Development history conveyor

1868 in the United Kingdom emerged conveyor; 1887 in the United States appeared screw conveyor; 1905 appeared in Switzerland steel belt conveyor; 1906 in the United Kingdom and

Germany appeared skate roller conveyor. Thereafter, conveyors manufactured by mechanical, electrical, chemical and metallurgical industry skills

The impact of advances in surgery, and constantly improve, and gradually complete the workshop by the internal transport, developed to accomplish within the enterprise, between

enterprises and even between cities material handling, mechanized and automated material handling systems become an indispensable component.
Chinese ancient high drum water overturned cars and mentioning, is the modern scraper bucket elevators and Telescopic conveyor prototype; 17th century, began to apply ropeway transport

bulk materials; 19th century, the delivery of a variety of modern architecture machines have appeared.

Screw conveyor conveying principle and structure characteristics

Commonly known as auger screw conveyor is suitable for granular or powdered materials horizontal conveyor, inclined roller chain conveyor, vertical transportation and other forms.

Transmission distance varies according to deformity, usually from two meters to seventy meters.
Features: Screw rotating shaft is welded spiral blades, blade face delivery of materials based on a solid surface different type, belt type face, leaves and other types of face.

Screw conveyor screw axis in the direction of movement of the material with a terminal thrust bearing to the accompanying material to the helix axis

Reaction force, the captain longer, should be added to intermediate hanger bearings.
Conveying principle: rotating spiral blade for Gravity roller conveyor passage of the material transported. So that the material does not rotate together with the screw conveyor blades

is the material force of its own weight and the frictional resistance of the material conveyor chassis.

Conveyor Control Circuit

From conveyor control system hardware control panel, door and check the signal, programmable controller, inverter speed control system, the control system architecture as shown

1.Chart speed inverter to complete the function, and logic control part is completed by the PLC.PLC responsible for the various signals

Send to a logic processing from the stop signal transduction responsible, while frequency converter will be their transport to the PLC operating state, forming a two-way

relationship.System also with the car is equipped with coaxial connection with rotary encoder and PG card, complete

Into a speed test and feedback form a closed loop speed and position loop.In addition, the system must also be equipped with a braking resistor, when the elevator is running

slow, the motor is in the national renewable energy generation, electricity back to the sensor, the pressure is increased with elevator lifts four-story office building designed

for AC

DC.The suppression through the analysis, the input signal shows the system including protection, selection of operating conditions, the on / off control 26, the position

detection, call ladder control.Output speed signal 21, including on / off, up, down, control signal converter, alarm, lighting

Such as Mitsubishi FX2's - 64MR PLC.Yaskawa use 616G5 inverter CIMR selected above on.Based - G5A 4022 Universal  Telescopic belt conveyor, technical features are: asynchronous motor direct

control current to maintain high output motor torque; suitable for various applications, at low and very

Surgically smooth start; This is the automatic adjustment feature can achieve a variety of high-performance motor control; its U / F control, vector control, closed loop ü / F

control, closed loop vector control melt into four control modes, including closed-loop the most suitable elevator control vector control

requirements.Rotary main motor encoder and a coaxial connector, through Pike Ka (also called encoder interconnect) for motor speed and position feedback elevator.Use Omron 's

light pulse pulse incremental rotary encoder.Coaxial 1024 rotary encoder with car

Connections, resulting in the A, B, A two-phase pulse phase pulse.When 90 degrees ahead of the B-phase pulse, the motor rotates country; when A-phase pulse lags behind the 90-

degree phase B pulse, that is, in reverse state.According motor A, B phase pulse phase sequence, you can determine the motor shift.According

To A, B pulse frequency (or period) can be measured motor speed.If A, B phase pulse edge before or after the counting pulses generated can be formed on behalf of the forward and

reverse displacement displacement flexible conveyor table pulse.Rotary encoder pulses This card output to Pique, Pike Ka adjustments will make this calculation

The feedback signal converter.

Conveyor belt tear how to do

Belt conveyor belt does not occur in normal operation of the longitudinal tear phenomenon, only when the deviation or internal tape harsh sharp objects, such as steel, iron, I-

beam, anchor, when the bulk waste rock and other Chuoru tape Tapes can be formed only scratched harsh when tear. Thus this side

Re-formed as sharp objects Chuoru tape longitudinal tear tape scratched or accident analysis. That is necessary to take comprehensive precautions to prevent the maximum limit

caliber machine tape walks longitudinal scratches or tears forming belt run accident occurred just ordinary tape tear torn tape edge, do not

Will be appearing in the tape inside. Avoid casual belt run analogy, a device according to the requesting device, the normal use of ordinary tape will not be thrown harsh

tearing accidents.
Avoid tape walks scratch or tear the longitudinal plane must understand the formation of scratch or tear tape foreign sources, and then take effective measures to prevent

foreign objects into the tape, improve maintenance installations, enhancing tape drivers and patrol officers walked machine Power Roller Conveyor sense of responsibility.

Research and application of new screw conveyor

This technology is a retractable tail structure to facilitate the use of time or adjusting screw conveyor chain tension after tightening chain level, in the technique is also

more mature, will lose further promoting the use of. Mining task in the current plane, the scraper walks of machine functions not only transported

Coal and materials, and is still the shearer orbits, and thus it became the ancient mining process is not a shortage of essential equipment.
Equipment Leasing standing task analysis Yanzhou Mining District walks machine usage and the surface characteristics of the foundation stage, the proposed mine in the further

establishment of "a mine shaft side of a" high-yield and efficient mine development trend when walks and improved machine direction.
The current level is Φ34 × 126mm Mining High intensity ring chain, followed by the laying of fully mechanized mining face length growth ring chain diameter can be increased to

Φ38mm or Φ42mm. As Yanzhou Mining Strong caterpillar traction way for a better use of results, so traction shearer will

The same in this form, but higher strength, more convenient maintenance traction tooth row selection will also become one of the ways. Its structure is important in order to

carry out all the forged grooves tend to help steel, welding plate tectonic-based, taking into interchangeable Metal detector for food inside width will insist on 900 ~ 1000mm,

Plate and bottom cover plates are high-strength wear plate. Scraper walks functions persist after another operation, production can be normal practice.

How to correctly grasp the conveyor installation and use

How to correctly grasp the conveyor installation and use
How to be able to accurately grasp industrial belt conveyor installation and reasonable use of it,
 An accurate installation and maintenance to ensure that the specifications of the same scraper chain, scroll at flexible operation. To ensure the flatness of the casing wall,

the interface does not agree with the upper and lower flanges and rails wrong move, should ensure smooth and no connection level. Also the interface flange should be straight,

not with the verticality of the casing

More than 1mm, to ensure that operation will not produce scraper chain scratching phenomenon is conducive to normal operation, to reduce wear and power consumption. Guaranteed

head, tail wheel center line level degree promised error less than 6mm and head, tail wheel and support rails must pair, and the head, tail shaft of the water

Roughness necessary leveling. Ascertain scraper chain running direction, do not hold against. Ensure an appropriate scraper chain tightness, not too tight or too loose. Adjust

the tail unit, to ensure that unused travel less than 50% of the whole. Electric motor output shaft, the output shaft gear and conveyors head shaft should be parallel, in response to the size of the chain and two sprockets axial offset to within 2mm.
Second, adjust the scraper machine slot backplane with proper clearance This is a relatively important issue, which affects the life of equipment and transportation efficiency.

Obviously, the gap is too small, clinker easily stuck in between the blade and the slot machine, slot machine floor scraper or cause damage or even break when severe

Chain of accidents. Gap is too large, then reduce the transmission efficiency. Gap size depends on the particle size of the clinker is generally determined by the following

formula: A> D / 2 +5 wherein A represents a blade clearance with the bottom slot board (mm); D represents a maximum particle size of the clinker (mm). After calcination kiln

clinker cooler through

Cooling, hammer crusher maximum particle size of 25mm or so later, control blade plate with a gap in the bottom slot 17.5mm or more, that can reduce the scraper plate and the

bottom groove wear and prolong its life.
Third, accurate, fair and timely maintenance efforts to strengthen inspection, examination revealed scraper chain without deformation or fracture, pin on pin off, should be

repaired or replaced. When the scraper chain loose should be timely adjusted so that the scraper chain tensioner in a suitable condition often work under the title found

Mesh, timely treatment, preventive measures.
Fourth, reasonable design and good manufacturing quality scraper is carrying member by 16Mn steel, welded directly perpendicular to the chains. Scraper chain traction member

which is designed for dual plate chain by two steel stamping forming rod welded into a chain, and then pinned together. Its characteristics are so

With reliable, making simple and cheap. In operation, the scraper chain to overcome a lot of friction, exposed to high dynamic loads and static load, and therefore the

manufacturing and welding scraper chain after heat treatment, it has a high strength, toughness and resistance to grindability. Chain plate in the material

On the selection 45Mn2 quenching, the hardness is HRC62, the longest life. Pin 45 steel or 40Cr quenched, its quenching hardness HRC38-43. Strict control blade clearance with

machine slot backplane. Found wandering, timely inspection, timely adjustment. After take relevant measures

, Buried scraper Airport conveyor greatly extended service life, overhaul period of four months from the original extended to 2.5 years, not only reduces the maintenance workload, but

also help reduce production costs, improve their market competitiveness.

Screw conveyor design requirements

Screw conveyor based design and select the required basic data as follows:
(A) the type of material to be transported and conditions
Experience has shown that the key to success conveyor design is about understanding the properties of materials being transported. In addition, the material is transported to

understand without rolling and shearing effect of tending to the screw conveyor is important, because it is easier to scroll difficult to cut than the material roll or cut

Material easier to transport. Familiar with and understand the flow of materials and rolling the impact of changes on the gravity skatewheel conveyor design is also very important. The

following properties of the material weakness to fully understand.
The type of material being transported, characteristics and temperature; material is dry or wet, corrosive no, block or adhesive properties, and other features;
The bulk density of the material being transported;
The material is transported largest block size, the percentage of the total volume bulk materials, the smallest material particle size. If possible, preferably with sieve

analysis results;
The abrasive material that can be used to represent the Mohs hardness;
Wash material off of mobility and its horns.
(2) requires the ability to transport OBJECTS
The ability of transportation of materials used t / to represent its normal and peak throughput.
(3) the delivery of materials from
The total length of the conveyor requires that the conveyor into and out of the spacing between the mouth again. If the incline conveyor system, to give the horizontal and

vertical distances and inclination.
(4) Conveyor Equipment
In order to choose a PC that meets the requirements of operation and installation of conveyors need to provide the following information;
Feeding method, the number and location of feed points;
The location of the discharge point;
Conveyor Application: transportation, upgrading, mixed, etc.;
Conveyor segment length (provided by the manufacturer segmented conveyor standard lengths and special lengths consisting of segmented total length);
Conveyor diameter and type of the spiral blade;
Some parts conveyor requires special materials;
The spiral trough of the type;
Require special suspension bearing frame, bearings, coupling shaft;
The type of the drive motor or the gear required layout.
(5) Operating conditions
Screw installed indoors or outdoors; ambient temperature range; batch or continuous operation; operation hours of a day.

Conveyor feed chute and discharge chute introduction

Since the unit at different heights and materials by virtue of its own gravity chute tilt slide from one device to another device. Sent from the device material chute called the

"next chute" or "out of the chute."; Send the material into the chute device called a "feed chute" or "derivative material

Slot ", actually two kinds chute chute can be the same, because of its different positions, leaving different name.
Belt conveyor feed chute
By supplying materials by conveyor chute to the application which is widely used. The types and uses, including the two most widely used feed chute.
With sieve feed chute allows fine material is formed on a Flexible skatewheel conveyor cushion to absorb the impact of bulk materials on conveyor belts and prevent massive material directly in

contact with the conveyor generated when rolling phenomenon.
Box with plot material feed chute for strong abrasive materials and slower conveyor, chute feed box at the bottom of a plot to absorb the impact of falling material and prevent

the chute being not normal wear and tear, but erosion of more than one material or materials to be transported

The conveyor can not use this chute.
Belt conveyor discharge chute
A typical belt conveyor chute top covering hood can be added, with the roller slide plate edge a sufficient distance in order to capture all the materials. If the material

contains hard, sharp block material, then slip rubber strips installed on the edge of the board is a better approach. Chute must be designed

Material left by the conveyor track to consider, in order to make the material falls inclined chute floor without falling pick up on a Extendable conveyor.
A properly designed chute, the material to be removed to make free and smooth flow of the material generated to avoid accumulation and clogging.

Advantages and disadvantages of vibrating conveyors

Vibrating feeder machine more types of materials transported from the large stones to powdered materials can be, but also transport larger abrasive and high temperature

materials. Conveyors and mechanical vibration mode electromagnetic drive in two, all the way to vibrational motion conveying materials.
The basic vibrating conveyor are mounted on a rigid frame from the upper plate by a hinged spring or a tank supported composition, material handling is the use of mechanical or

electromagnetic means to swing back and forth trough effect. Its structure type and drive type with the application. Vibrating tank mounted on it right

The fundamental role of bulk solid material is thrown upward and forward material particles, so that the material along the trough to form a series of short jumps forward.
Conveyor trough vibration caused by electrical or mechanical. After the force conveyor trough for forward and upward movement of the material also will be tossed, tank back down

and backwards when moving the material is relatively forward some distance down. This repeated cycle of movement, with this conveyance

Type, so that the material of the chain conveyor trough constantly move forward.
The material being transported along the tank by changing the flow rate of the vibration amplitude or frequency to adjust. It is widely used to make vibrating trough feeder, for

example, the vibration tank mounted directly below the hopper to control the discharge rate.
The advantage of vibrating conveyors
Can transport heat and abrasive materials, even when conveying high temperature material for the tank insulation without affecting the conveyor moving parts; material during

transport by water, steam jacket, through the hot air, infrared light materials are cooling, drying or dehydration, and other operations

For; own cleanup function can eliminate pollution, and can meet the health standards; equipment can be covered, so airtight and dustproof. Separated using a computer with a

conveyor trough different materials can be transported simultaneously without generating mixed; a vibrating conveyor can set up multiple discharge points in the middle,

May be simultaneously or alternately discharge; vibrating conveyor simple structure low headroom required; order to isolate the bulk material and coarse sieve, sieve can be

added; vibrating conveyer general required power is low, especially the natural frequency ( natural frequency) type.
Disadvantage vibrating conveyor
Since the relationship between economy and design limits the length of the vibrating conveyor (usually single single drive vibration conveyors generally not more than 100m);

transmission capacity is limited (to 30m long vibrating conveyor with a capacity of 350t / h); adhesion of the material can not be transported, to make certain materials broken

Crack; gas-containing materials can not be transported as easy to overflow the tank bottom or float moves along the thin layer of material; generally can not be used to

transport into items; not large angle upwardly inclined conveyor material (generally 10 to 15 degrees left and right); electromagnetic vibrating conveyor drive is noisy; pair

construction

Buildings with vibration; does not reverse transport; requires heavier and more support frame.

Chain conveyor applications and supporting frame structure

Chain conveyor applications
In general, the chain conveyor used to accomplish a lot of heavy bulk solids conveying tasks, such as coal, coke, ore, slag, rock, stone, sand, gravel, clay, coal, foundry sand.

Chain conveyor suitable for large-scale crusher, crusher, grinding machine

And of other similar mechanical feed device, can also be used from the processing machinery, storage silo warehouse, other devices for conveying material hopper to the feed

device, may be used as long horizontal transport or upward, downward transport tasks initially The transfer material feeding device or devices. Chain plate output

Sending machine's layout is flexible, depending on the level of requirements can be increased first and then tilting joint arrangement to adapt to changing conditions improve.

The structure of the support frame
The main purpose of the support frame for the conveyor roller chain to provide the orbit and the fixed link plates provide a solid support member. Scales conveyor mechanism

Frame Design There are three types:
A type - and return with a carrying chain track, the track of the angle iron, usually lined with wear-resistant steel;
Type B - used to load and return rail tracks;
Type C - type A and type B combination, bearing track for rail, on the return track of the angle iron.
These types of structures generally are made from a steel frame with rails and a rod and angle iron beams formed. For long Turn conveyor use truss support, and the same as the

conveyor to a walkway.
Material guide baffle material guide plate is usually based on the design capacity under the link layer height to decide. The main consideration is the material of the

conductive material to increase the frictional resistance generated baffles chain tension. As a general rule, the guide baffle material equal to 1.5 times the height of the

layer of material height.
Select the link plate thickness, generally considerations: each chain plate must be able to withstand the total weight of the respective materials, and to limit deflection to a

minimum, so as to prevent the chain plate bending at the overlap; loading the falling block material impact will cause the chain plate deformation; being transported material

Abrasive; corrosion resistance and resistance to chemical reactions; expected lifetime; economic costs (cost) limit.
If the material being transported to corrosion or chemical reaction with the performance, you can add metal chain plate surface protective coating, if the material is

transported metal chain plates fear of contamination, you can use a metal alloy chain plate.

Bucket elevator operation and maintenance instructions

Bucket elevator is used to aggregate and powder, respectively, to enhance the heat shock screens and weighing device to a horizontal plane.
In the load-bearing structure of the bucket is fixed on two parallel chains and pulleys to run side by side. By acting on the pin shaft and the slide in the vertical guide rod

bracket chain tensioner springs. Bucket elevator by spiral spring tension adjuster to adjust. The flexible conveyor drive shaft

And mounted on the gear box on the swing arm shaft torque by the motor drive.
1 chain tension
Appropriate tension to avoid slipping when running. To check the tension, you should remove the side panel observed.
Hand shake chain, chain should slightly rigid. If desired, the regulator to ensure that both sides of the movable plate and the fixed plate parallel to and equal distance. A

practical approach is to regulate the rotation of each regulator is the same number of turns. Each adjustment, spring compression must not exceed

50%, chain wear, foot shaft bracket close to the lower limit of the guide rod is best replaced with new chain and check whether it is necessary to replace the chain and bucket.
Each chain can be reduced to one or two links in order to correct the chain due to wear caused by long, but this is not a very reasonable method.
In operation, if the shaft or the driven shaft noted every turn, support a large vibration is generated, then the sprocket may be oval.
2 Replace the bucket or changing chain length
Remove Doumen, near the open Doumen, remove the bucket to be replaced and the chain.
Replace Grapples, simply tighten the four nuts that secure it to.
If the hook must be replaced, to thoroughly loosen the regulator and lift the driven shaft to chain relaxation. To ensure that one for a good hook to prevent the chain off.
3 Replace the chain
The fastest and easiest way is to maintain the status quo in the bucket in the case, both from the upper hoist remove two chains.
This step requires a suitable length with a rotation of the crane arm.
In reverse order, repeat the process to have been on the ground for a good chain and bucket mounted beside the swing. To prevent the danger and trouble to make sure when

installing the last bucket chain conveyor does not move.
4. Lubrication
Gearbox - with oiling and oil drain plug.
Bearings - bearing with grease fitting. Or fitted with lubricated bearings.

Vibrating conveyor trough structure

Vibrating conveyor trough generally made of steel plates, with its width and height to the required transmission capacity to adapt its length is based on the requirements of the

material transported in the distance. Tank with a spring or chain link with hinged support or suspension, by the driving means to produce vibrations.
(1) vibrating conveyor trough cross-section
Straight sidewalls flat tank from a single piece of steel from repression, for general transportation; oblique sidewall flat tank. When conveying hot materials can be material

on the side to minimize friction and deformation; slotted wall tank. Tank body stiffness and have a replacement flat; semicircular or elliptical

Tank. For conveying relatively thin, circular sheet materials (such as food, can lid, caps, etc.); straight walls with flat lid flat tank. Dust-proof and water proof, to make

the material being transported does not hit the top cover, so to limit the thickness of the material in the tank; tubular tank. Use for

Conveying or feeding seals required. The majority of the material being transported, the adoption of such a tank must not be above the centerline of materials; tank with an

arched roof, flat roof tank with the same, but its more rigid; V-shaped trough. Transmission capacity is very low for the occasion, you can continuously

Places to concentrate, were thin remove particulate material stream.
(2) vibrating conveyor trough material selection
For overloaded conveyor trough to obtain strong solid. The tank can be low carbon steel, wear-resistant steel, stainless steel or other special alloy steel, according to

requirements in a wide range of materials can be selected. Tank lining these materials may also be used, may also rubber, plastic

Or ceramic.
Tank lining material according to the performance of the material being transported and economic factors to select, size 25 or 50mm for less highly abrasive materials, high-

density alumina porcelain lined, bonded with epoxy resin The flat on the tank, this ceramic lining has been successfully used to

Transport rolling mill coke and other materials. There are also polyurethane plastic lining, this lining has been used to transport wet, thin, abrasive materials.
Other commonly used in the lining material is 304 stainless steel, it is particularly suitable for conveying corrosive and abrasive materials. Material in the feeder or conveyor

sliding action on the stainless steel worn very smooth, you can prevent the accumulation of material, but also thereby extending its life. When the need to

Vibrating conveyor to control the noise level within the allowable range in the standard, and sometimes the body located in the groove in addition to the lining, but also to

adjust the conveyor speed, inclination and length of stroke.
(3) vibrating conveyor trough structure
Vibrating conveyor trough is generally forming or pressure plate welded structure, depending on the load conditions, the groove width, transportation of materials

characteristics, expected degree of wear of the tank and replacement requirements to choose. Power Roller Conveyor trough body frame designed with beams, beams fixed on the solid

side

The longitudinal groove in order to ensure that the various operating conditions of the size and shape of the tank constant.
Pressure molded tank with a single piece of extruded steel bottom and two sides, which ensures that the powder material does not leak. This tank lining, especially the use of

thin stainless steel plate forming the lining, can be used in flat bottom ensures easy replacement.
Plate welded tank from the bottom and side panels three steel plates. The maximum width of the tank can be spliced ​​to 3650mm. Between the sides and bottom with a continuous weld

seams. This construction can be equipped with flat lining, the lining can be quickly and easily replaced.

Vibrating conveyor installation and influencing factors

Installation vibrating conveyor
Vibrating conveyor trough installation method according to the driving mode, the load of the tank material and to determine the structure of the stent, the stent inherent

vibration and inertia do not sync.
Vibrating conveyor frame to withstand the reaction force of the vibration, vibrating conveyors installed in the interior, in order to avoid resonance, a higher natural frequency

to building a solid structure.
Vibrating conveyor is started or stopped, tuned to the vibration of the time was short, but it will cause a lot of abnormal vibration.
Vibrating conveyor stack height from the ground stents generally no more than 3m, if too high will increase the cost of the stent, it is not economical.
Wu balanced industrial belt conveyor 90 percent if vibration isolation effect and the frequency of about 600c/min, no problem using one bracket.
Vibrating conveyor can not be directly installed in the silo or hopper below the column of material because of the increased load damping effect, so that the design of dynamic

equilibrium become unbalanced, so the material must be fed through the feeder vibrating conveyor inside.

Factors and there are data
As mentioned above, the material being transported in a vibrating conveyor trough is the principle of the body to move forward with a tank larger than g acceleration forward and

upward movement, and when a sudden stop, the material particles by shock acceleration effects continue forward and upward. In a flash tank behind the rise again under this

When the first particle out of its own weight naturally fall into the groove surface, and subsequently with the tank up again, get acceleration, and then rushed forward at the

top, leaving the material continuously repeated so moving forward particle transport. food conveyor trough body of material handling speed and transmission capacity and

This principle has a close relationship. In fact, the material being transported particles in the tank body force and the trajectory is very complicated because the nature of

the material being transported with conveyor trough conveying movement is closely related to each other, influence the following factors:
The conveyor-related factors: the manner and vibration of the vibration angle; vibration frequency; vibration amplitude; conveyor inclination of the tank; tank stiffness; groove

shape and smoothness of the body; tank liner installation flexibility; existence of static electricity.
Factors relating to the nature and the material: the bulk density of the material; material particle size and shape; material particle size distribution; coefficient of internal

friction of the material; material coefficient of sliding friction; materials cohesion; material internal damping; the material body in the groove thickness.
From the above listed with tank and materials related to the nature of the various factors shows that, in calculating the vibrating conveyor speed of transport and transport

capacity, it is not just theoretical formula projections, should also include other relevant factors in order to obtain reasonable results. These factors and related information

To rely on experience and laboratory tests to get. In recent years, Europe and the United States published on vibrating conveyor speed of transport and delivery capacity

theories and formulas are different, many manufacturers of conveyor also made a lot of their own research and experimental work, but concluded

Rarely published.

Two parts conveyor safety norms

Tensioning device
Tensioning device should be installed in the limit position limiters. Automatic tensioning device to rise from extreme positions, you must ensure that the lifting automatically

cut off the power, and gives the ban lifting signal. The current position to its limits, to ensure the power supply automatically cut down, and down signal given prohibited.
Weight tensioning device usually close to the place of personnel protective equipment should be added. Belt guards shall be able to prevent people from entering the space under

the hammer, the absence of such protective devices should be installed under the hammer supporting device and make it off the ground or other work surface clearance distance of

not less than

2.5m.

Braking device
Braking device must be able at all times the state of braking action. Its braking friction surface without any obstruction braking performance defects or glue oil.
Normal and emergency braking device should use eye-catching signs, and should be located in a position for easy operation.
Tripper car brakes should be sensitive and reliable. Its limit clamping device should be able to work independently of the state of maximum wind without being blown by the wind.

Rail end stops should be set to ensure tripper car does not derailed, do not fall over.

Hoppers, chutes and shroud
Feed hopper and chute opening or transshipment locations often have personnel protective equipment should be set closer.
Large hopper or chute inspection doors should be installed, its location should be easily accessible. Equipment operation inspection door should not be opened, in indeed

protected under the premise of full-time staff on the inspection door. If using manual inspection door opening force shall not be greater than its 300N.
Handling viscous materials can be a mechanical device or vibrating hopper dredge equipment, in the absence of protective Flexible skatewheel conveyor measures under the conditions of non-artificial poke

strike dredge.
Large hopper in its prominent position should be set banned cards. Need to be maintained into the hopper safety measures should be used exclusively.
Hoods and the lower edge of the funnel portion extending above the ground when the distance is greater than 300mm, the edge should be taken inwardly bent angle or curling and

other measures.
gravity conveyor Covers should be sealed tight, flame-retardant materials should be used. Hand tools should be free to remove or tighten. Its observation window should be located in the

material can be easily observed in the location of the operation.

Selection broken arch is installed Handling Precautions

      In a variety of coal storage warehouse, storage of coal due to moisture, the backlog of other reasons, can form different types of bagging clogging. In order to meet the

needs of a variety of situations, broken arch Selection and arrangement of positions should be based on the form of coal, capacity, cross-sectional area, discharge angle, stored

material nature, the environment, etc.

Conditions into account.
A principle of selection
(1) various volume broken arch device type: ① volume 70L or less broken arch is mainly used for dry coal, less impurities, good liquidity, coal storage capacity and the cross-

sectional area smaller occasions, such as: plastic chain conveyor coal preparation plant and so on. ② volume 70L, 170L between the broken arch is mainly used for storage of small general stores

Briquette positions. Such as: underground coal bunker transfer points and so on. ③ volume 170L, 300L between the broken arch, the main condition for the complex coal coal

storage, storage silo capacity and cross-sectional area is not too large, the flow conditions are poor and easily compacted compaction COAL BUNKER on. Such as: all kinds of

medium loading coal bunker, larger capacity

Coal storage, surge bin and so on. ④ volume 500L broken arch, mainly for large storage bunkers, such as: a large centralized coal storage capacity and so on.
(2) coal bunker meet the following situations, to use a larger volume of broken arch device.
 ① highly moist powder coal material; ② with large gangue, coal lump coal mixed material; ③ the consolidation of long-term storage of coal material; ④ bunker exit cone angle

flat or narrow;
(3) For the coal bunker with explosion-proof requirements of the broken arch device should be used in pneumatic or electric control type explosion-proof solenoid valve. I use

mine gas control type.
2 Installation Method
      Bunker structure  roller conveyor  analysis and field observations, in general, most likely bagging, blocked parts of the wall and the vertical position to the lower conical hopper

junction, so cloth emphasis should also be broken arch is in this range. For a variety of situations within easy camber angle at different levels by breaking the arch is

arranged a number of units,

Form a working operating system. In general, cloth broken arch device layer from 0.9 - 1.5 m, spaced about 5 meters staggered with. These are just general selection method. The

exact configuration of a bunker several, sub-layers shall be arranged according to specific circumstances.
      Broken arch uses flange connection, light weight, greater freedom for installation, use the rope hanging or bolted to the coal warehouse wall, can be placed on the

platform or the ground, as long as the safe, reliable, easy maintenance can be. Installation should try to find ways to reduce exhaust airflow resistance

, To reduce power consumption. Its exhaust port should be facing down, into the mouth to prevent the device sewage, debris affect the results. Broken arch drain plug on the

device body should also lower, to maximize the ejector body of water.
3 Operating System
      Broken arch the operation is very flexible and can be manual, pneumatic single control; regular automatic blasters and other control methods. When you first open the

manual valve operation, the gas will automatically enter device body requires blasting, click the Start button, an air signal to the valve. Broken arch device that

Powerful impact ejected through the vent airflow, automatic recovery after energy release inflated state, ready to complete the second work cycle.
4 Note Tong matters
      Broken arch is fully installed, after careful examination, no problem again broken arch is inflated and sealed inspection, after passing the test can be conducted sake of

making criticisms, the test can be used to put a lower pressure test, no problem then gradually rose to the maximum working pressure, safety qualified to be formally

Put into use.

Transportation machinery and butterfly valve

Gate (VA G-EKO valve is closed parts (ram) along the channel axis perpendicular to the direction of moving the valve, pipe cutting medium used primarily as a road, that is fully

open or fully closed to use. General, not be used as adjustable flow valve use. High pressure can also be used in combination suitable for high temperature

Low and according to material differences between the valve gate but not generally used for drag chain conveyor mud and other media pipeline.
Strengths:
① fluid resistance is small;
② opening and closing torque required is small;
③ can be used in a medium flowing in the direction to the two rings on the road network, that the medium flows unrestricted;
④ fully open, the sealing surface by the working medium erosion than globe valves;
⑤ body structure is more complex, the production process is better;
⑥ relatively short length of the structure.
Defects:
① larger dimensions and opening height, the required installation space is also large;
② In the opening and closing process, the sealing surface were relatively friction, wear large, resulting in high temperatures likely to cause abrasions;
③ generally has two valve sealing surface, to processing, polishing and maintenance of some difficulties;
④ open and close for a long time.
Butterfly (VA G-INTEREX VA G-EKN Butterfly is the  roller chain conveyor reciprocating rotary disc hoist about 90 ° to open, adjust the fluid channel blockade and a valve.
Strengths:
① simple structure, small size, light weight, supplies Province, particularly for large diameter valves;
② open and close rapidly, flow resistance coefficient;
③ can be used with the suspended solid particles of the medium, based on the strength of the sealing surface can also be used in powder and granular media. Suitable for

ventilation and dust piping bidirectional hoist and regulation throughout used in metallurgy, light industry, electricity, kerosene, gas pipelines and chemical fractions of

waterways.


Defects:
① flow adjustment range of small, up to 30% when open, the flow will carry more than 95%.
② As the butterfly structure and sealing material limits, not for low-temperature, low-pressure piping systems. General Task temperature below 300 ℃, PN40 6 40 less.
③ sealing performance relative to the valve, Stop Valves poor, so not very high requirements for sealing the center.

Two properties of bulk materials and verification elements

Electrical properties
1. Static electricity
Static electricity is an electrical potential of the material obtained, causing adhesion or attachment, and affect the material flow. When through the hopper or belt conveyor

discharge, sieving or dry granular materials are mixed, in close contact with these materials suddenly separated, the particles may induce electrostatic potential. Non-

conductive solids such as plastics are particularly prone to the above problems.
The size of static electricity by meter measurements. Design by equipment grounding, controlling the movement of atmospheric humidity and the appropriate methods to prevent

electrostatic material harm. Power Roller Conveyor
Typically, non-metallic oxides and acid generation, such as carbon, sulfur, silica, salt, starch, etc. can be positively charged. Metals and their oxides, such as iron oxide,

magnesium oxide, soda ash, aluminum, alumina, zinc oxide and zinc oxide can be negatively charged.
Take the following measures to reduce electrostatic effect: to make the material sufficiently grounded; controlled humidity to prevent moisture on the material impact; using

antistatic medium; using energy and materials compatible additives; changing the flow rate. Higher flow rates will lead to an uneven distribution of charge; change conveyors

method; changing device material, easy to charge elimination and so on.
2. Magnetic
Refers to a solid magnetic performance can be magnetically attracted. Magnetic force can be used to separate the iron from the solid, but also used to transport materials.  Flexible Roller Conveyor
3. Conductivity
The conductive material is capable of transmitting electric current in nature. When processing a material having such properties, the ground is necessary.
Temperature of
1. Mp
The melting point is a solid and a liquid which has a softening temperature. Some of the material when it reaches this temperature it is damaged, or there will be in a fluid

state, corrosive or toxic. Temperature control and alarm system can be used to avoid this hazard.
2. Freeze
Wet material can cause the ice to freeze bond impede flow. This phenomenon usually occurs during the cold season in storage bunkers or rail vehicle, which prevents tools are:

use of insulation material silo silo wall insulation or heating jacket used to control the heating temperature; using a small amount of additive is mixed with the storage of

materials, to lower the freezing point.
3. Temperature
Because such material is subjected to temperature changes and other physical properties of crystals changes, but also to appear caking cracking. Change of temperature and other

effects are not always clear lumps, due to the small amount of water, and in the process the presence of other vapor, will bring the problem of liquidity. Therefore, in the

operation of a genuinely representative sample sampling is important.
Summary
Section bulk solids with a variety of properties and a number of related properties. In the design of a variety of bulk solids storage system, you must first be investigated.

Typically, before you start designing the material given to verify the following:
To get the material bulk density, grain size, largest block of data as well as the shape of the solid; obtained angle of repose of the material and the sliding angle data;

determine whether the material containing dust or toxic or explosive; to understand the temperature or humidity on the flow properties of materials have any effect; according to

materials of construction material being processed and the extent of corrosion abrasive consider the need for the use of special construction materials or demonstration of its

correctness; understand the material is bonded or free-flowing, wet or dry, combustible or decomposable; materials can be caused due to electrostatic adhesion and adhesion.
The lack of any one of these various indicators of data, will seriously affect the system of the selected transport machinery, silos and feeding equipment in normal operation.

If you really can not get the data, it is best to run in all types of materials can be processed to obtain the actual operation unit test data. Operational test and ascertain

the effectiveness of these devices are required equipment manufacturer collaboration. In the United States generally use this method to solve such unknown and the lack of

experimental data by engineering problems.

The development of pneumatic conveying and classification

History of the development of pneumatic conveying
Pneumatic conveying applications in industry began in the first half of the 19th century (no more than about 1886), BFStutevant prove solid particles in the air stream in a

controlled delivery. The first pneumatic conveying practice is to use a vacuum fan drive system that is widely used in processing wood chips and grains. Early 20th century, the

greater use of positive pressure system. Conveying speed is relatively high, is transported suspended particle concentration was low in the gas, which is called dilute phase   chain conveyor

conveying. If the reference of modern engineering literature documented published articles is H. Gasterstadt discourse published in 1924, he proposed to describe the flow of air

and gas - solid mixture flow pressure drop in the pipeline theoretical laws. His main research work is the delivery of particulate solids and cereals (such as wheat), his   roller conveyor

empirical formula for such features as the material is still correct.
Since 1924, then, in this regard the rapid increase of available data and documentation, pneumatic conveying technology gradually be developed. Start the separation cyclone and

airflow through the filter material is transported separated, and then provide technical extended to overcome the pressure drop will reverse bulk solid material into the

conveying line (started using rotary feeder, then spiral pump) .
During World War II, due to the demand for aviation gasoline, creating a solid fluidization technology has been greatly developed. Many industries use pneumatic conveying

particulate material has become common methods, such as pharmaceutical, food, plastics, cement, chemical, glass, mining and metal industries, etc., generally used in the

materials storage, transportation, by the materials and measurement processes.

Classification of pneumatic conveying systems
So far still no elaborate various models of pneumatic conveying systems industry standards. Broadly speaking can be divided into pneumatic conveying and air conveyor trough two

categories.
(A) pneumatic conveyors
a. Low pressure pneumatic conveying system
The system material is imported under a vacuum or positive pressure air (or gas) stream. This system consists of an ordinary pressure system, negative (vacuum) system, positive,

negative, and a closed loop system hybrid system composition.
b. Mechanical pneumatic conveying system
The pipeline system through a specially designed inlet turbine spiral like a class of the air and material feeders are mixed together, that the material feeders air nozzles into

the mixing chamber and the contact surface is fed stream. This mechanical strength higher air pressure system, a pneumatic system generates pure dense flow of solids.
c. High-pressure pneumatic conveying system
Air in the system is stored into the material, causing the material flow. Material added called "Send pot" high-pressure position, enter the warehouse material into high-

pressure gas pipeline was carried away, this is called "dense phase" system or "Send pot" system. The higher the mean operating pressure at a higher bulk solids concentration

and the longer distance is conveyed.
d. Pulsed pneumatic conveying system
Pulsed pneumatic conveying system to supplement uninterrupted Tigong air into the pipeline to ensure the delivery of materials to maintain fluidization and transport along the

entire length of the flow.
(2) Air trough
In the system of fine, dry bulk solids fluidized by air, and by the self-gravity movement, the flow angle of repose of the material and the pile density. Housing trough

separated by a specific porous plate into an upper and lower two parts. Air enters through the bottom of the trough so that the material fluidized porous plate and the upper

flow of the trough.

Loading machinery use and maintenance of run-in period

Loading machinery use and maintenance of run-in period
First, the run-in period features
1 wear faster
Since the new machine parts processing, assembly and adjustment factors, the friction surface roughness, with the surface contact area is small, uneven surface pressure

conditions. The machine during operation, some parts of the surface irregularities friction fitted to each other, grinding down to the metal debris and continue to participate

as an abrasive friction, more accelerated wear of the mating surfaces of the parts. Therefore, run-in period is likely to cause parts (especially the mating surface) of the

wear, wear faster. At this time, if the overload operation, it may cause damage to components, resulting in premature failure.  bucket elevators
2. Poor lubrication
Parts of the new assembly with the gap is small, and of the assembly and other reasons, it is difficult to ensure uniformity with the gap, lubricant (grease) on the friction

surface is not easy to form a uniform film to prevent wear. Thereby reducing the lubrication performance, resulting in abnormal wear of the early parts. Cause serious friction

with precision surface scratches or bite phenomenon, leading to failure.
3. Loosening
New processing and assembly of parts, the presence of geometry and with the size of the deviation, the initial period in the loader, due to shock, vibration and alternating   Turn conveyor

load, and heat, deformation and other factors, coupled with excessive wear and other reasons, easily so that the original tightening of loose parts.
4. Leakage occurs
Loosening of the mechanical vibration of combined heat the machine, the machine and the sealing surface fitting logout leakage phenomenon, part casting, machining and other

defects in the assembly debugging difficult to find, but during the operation of the vibration, shock role of this flaw is exposed, the performance of the drain (infiltration)

(water), therefore, prone to leakage run-in period.
5. Operational errors and more
Because of the structure of the machine, do not know enough performance (especially the new operator), susceptible to failures caused by operational errors, and even cause

mechanical accidents.
Second, run the application and maintenance of
1. Since construction machinery is a special vehicle, operating personnel should receive factory training, guidance, and the machine structure, properties have a full

understanding of, and access to certain operating and maintenance experience before operating the machine. Manufacturers to provide "product maintenance manual" is the operator

to operate the equipment necessary information before operating the machine, be sure to read the "maintenance manual", according to the requirements of operation and

maintenance.
2. Note that the workload run-in period, half of the workload run-in period should not exceed the rated working load of 60%, and to arrange for appropriate workload, long

continuous operation to prevent the machine overheating caused by the occurrence of the scene.
3. Note that each instrument instruction frequently observed, abnormal should be excluded promptly stop in reason is not found, the fault is not excluded should be stopped

before operation.
4. Note that regular checks of lubricating oil, hydraulic oil, coolant, brake fluid and fuel oil (water) bit and the quality and attention to check the tightness of the machine.

Inspection found that too much water is missing, you should analyze the reasons. Meanwhile, the lubrication points should be strengthened lubrication is recommended run-in

period, the class must be on the lubrication point greasing (except for special requirements).
5. Keep the machine clean, adjust, tighten loose parts to prevent loosening due to increased wear and tear parts or cause parts missing.
6. Run-in period is over, deal with the mandatory machine maintenance, inspection and adjustment of work to do, while paying attention to fluid replacement.

Belt conveyor control characteristics installation and commissioning

Conveyor Control Features
Head and tail of the conveyor is mounted sweeper head and empty segment. For the hammer head cleaner scraper structure, mounted on the bottom of the drive roller, used to clear

the conveyor face sticky material. Empty segment as a scraper cleaner structure, installed in non-face conveyor belt near the tail above the conveyor belt used to clear the

non-working surface materials.  Elevator conveyor
Conveyor belt using polyester canvas, with oil, acid in nature. Joint use of vulcanized joints, the joint safety factor 10-12. Conveyor side mounted rope switch, when an

emergency occurs on the rope pull switches activate this switch, you can stop immediately. After troubleshooting, pulling the RESET pin switch can be reset.
Conveyor head tail mounted deviation switch, deviation occurs when the conveyor belt, the belt drive roller stand on the switch to rotate and tilt, tilt angle of 12 ° is

greater than one action, issue a set of switching signals; such as vertical roll continues tilt angle greater than 30 °, the two actions, issue another set of switching

signals. Two sets of signals for alarm and shutdown. When the conveyor to resume normal operation, the vertical roll automatically reset.

Installation and commissioning of belt conveyor
1 each of the legs conveyor, column, or a chemical anchor platform firmly fixed on the ground.
(2) the various components of the rack mounting bolts should be fully tightened. The roller should be flexible rotation. Roller axis line, drive pulley, bend pulley axis line   vertical conveyor

and the rack should be perpendicular to the longitudinal centerline.
3 spiral tensioning stroke captain 1% to 1.5%.
4 rope switch mounted on the side of the conveyor, two coated steel wire rope with a switch connected between the appropriate tightness.
5. Deviation switch mounted on the rear sides of the nose conveyor installed in pairs. Switch vertical roll band edge perpendicular to the conveyor belt, and to ensure a high

degree of vertical roller band edge is located about 1/3. Vertical distance between the roller and belt edge 50 ~ 70mm.
6 The sweeper, guide trough with rubber scraper conveyor belt full contact should be, otherwise, regulating and guiding trough cleaner mounting bolts to make contact with the

conveyor belt scraper.
7 After the installation is correct test run. Test run time less than 2 hours. And check the following:
(1) The roller conveyor should contact flexible rotation.
(2) No leakage at each lubrication.
(3) The no loose fasteners.
(4) bearing temperature not greater than 40 ° C, and the maximum temperature does not exceed 80 ° C.
(5) During normal operation, the conveyor should be running smoothly, no deviation, no abnormal noise.