The metal detector ZM roller conveyor used in the food industry

In the food industry to detect the metal impurities mainly use metal detector, metal detector for food is divided into two kinds: belt type and pipe type. Belt conveyor is a conveyor belt, put the food ZM rubber belt conveyor in the belt through the probe if metal containing impurities will alarm shutdown or exclude. Pipeline type is mainly free floor type, food free fall, after the probe will alarm and then discharged.
At present, the food with a metal detector, the best number of Germany, in the Chinese foreign products are made in japan. Requirements for metal Japanese food is very strict, they put forward at the China food processing standards, most of the domestic products are not up to the requirements, some special food even German products are not up to the ZM drag chain conveyorrequirements, such as: meat, salted vegetables, canned. Some make the product qualified domestic practices belong to the business secret, is not convenient to disclose. (metal detector is the electromagnetic principle, very susceptible to interference. The test block standard in general by the manufacturers to set)

Vertical transportation function continuously vertical transport of materials

Vertical transportation function continuously vertical transport of materials to make different continuous Telescopic belt conveyorheight remains short on material handling. You can also say that vertical conveyor is the conveyor system between different floors connected into a larger continuous conveyor system important equipment. Also known as continuous vertical screw conveyor  vertical conveyor (Vertical Continued Conveyor) and folded plate vertical conveyor.

Screw

Rotating helical blade passage of the material carried Screw conveyor, screw Chain conveyor so that the material does not force the blades rotate together is the material of its own weight and the screw Telescopic conveyor  cabinet friction materials. Screw rotation axis welding spiral blades, blade surface transport of materials depending on the type of entities face, belt face, the blade surface type and other types. Screw terminal helical axis in the direction of movement of the material to thrust bearing material to screw with axial reaction force, the longer the captain, should be added to the intermediate hanger bearings.

Factors affecting the performance of thespiral conveyor idlers

As an important part of roller belt conveyor , belt conveyor transport materials when exposed to more than 70 % of the resistance. As usage large, large frequency conveyor replacement parts, we need to consider some aspects of the selection, use and maintenance to improve the performance of idlers . Here, on the Hai Yu sound mechanical introduce affect performance ZM Belt conveyoridlers major factor . ( A ) the sealing effect is not good: the internal use of the sealing roller is axially non -contact labyrinth seal , which is characterized by the inner , outer seal is formed between the gap to achieve a small zigzag sealed better dust , but the water is less effective , and production status of underground ZM Pharmaceutical metal detectoris dusty , and dust with water , so that the sealing rollers must have a good dustproof, waterproof effect. If the water will corrode roller bearings, into the dust will damage the bearings, the ultimate impact idlers life. ( 2 ) roller shaft concentricity difference: drawing roller shaft axis , which is characterized by its surface roughness and dimensional accuracy can be achieved without working drawings , easy to use them , saving labor . However, due to wear and tear due to mold and other factors caused the production of dimensional accuracy when drawing axis unstable , often have exceeded the phenomenon , coupled with the transport process could easily lead to bend , so that the roller shaft concentricity poor , two idler shaft bearing clearance side installation can not be guaranteed , so that the roller rotation resistance increases , the impact roller life. ( 3 ) bearing concentricity difference: roller bearing is used for stamping , leather tie at the cylinder without processing , bearing directly on the cylinder welded skin . When stamping bearing is not round or cylindrical end face inequality skin are easy to create with the Department after the tube leather welding different ends of the bearing shaft , resulting in reduced bearing clearance , rotational resistance increases, the rotation is not The importance of idlers we all understand , then for idlers need to carefully consider the choice of treatment . The above three aspects that need to refer idler selection , but also in the use and maintenance of rollers need to focus attention in the three points.

Adjust the length of the belt conveyor installation tips

 When we use the conveyor belt, the installation procedure is particularly important. To ensure correct installation of the belt can not only avoid unnecessary defects, and also

allows the belt to work better .
    When installing the conveyor advance roller conveyor for the entire conveyor belt to be installed careful planning calculations, whether new or old belt replacement belt installed ,

otherwise it is likely to cause the situation to take a long conveyor belt , is a direct consequence weight ( weight counterweight ) hits the ground,

Lead to start slipping. Although there was no problem , no problem test , but the position of the lower configuration , running two or three months later , with heavy drooping,

hit the ground when starting . This is because the installation process does not take into account Flexible Roller Conveyor the elastic deformation and plastic deformation of the belt . Conveyor Safety

When loading or too short , you should leave a margin for future maintenance. If the length of the minimum basic tension in the spiral . Joint problems after a period of use ,

the conveyor belt margin is not sufficient to redo the joints, had to re- install the new belt. This makes our conveyor cause

The white waste. While enabling enterprises subject to certain unnecessary losses. This is what we want to see the production situation . Ideal conveyor installation is that

after installing the conveyor belt of moderate length ( we should take into account summer and winter temperature differences affect the expansion of the conveyor belt ).

Best to reserve a margin joints , which can effectively prevent the installation length of inappropriate questions .

Conveyor use can be divided into several

1 , bulk material handling machinery ( such as: conveyor screw conveyor bucket elevator steep conveyor , etc.)
( 1 ) by a drive belt conveyor conveyor belt tensioning device composed of the central frame and roller conveyor as traction and bearing member , whereby continuous conveyor

into pieces scattered and fragmentary automated sorting machine materials or goods .
A friction drive conveyor transported materials in a continuous mechanical . Apply it, the material can be transported in a certain line, from the initial feed point to the

final discharge point between hot water heat exchanger the formation of a material transport processes . It can deliver a granular material can also be

For delivery into items . In addition to the purely material handling , but also can be used with various industrial production processes required in the process of cooperating

to form a rhythmic flow transport line . So the belt conveyor is widely used in modern industrial enterprise.
Underground tunnel in the mine , mine ground transportation systems , open pit and concentrator , the widely used conveyor . It is used for horizontal or inclined transportation

transport .
Universal conveyor from the conveyor belt, roller , roller and drive , brake , tension , bend , loading, unloading , cleaning and other device components.
① conveyor
There are two commonly used with rubber bands and plastic . Rubber band applied between the working environment temperature -15 ~ 40 ° C. Mass temperature does not exceed 50 °

C. Transported upward inclination of Granules 12 ° ~ 24 °. Delivery available for large angle tread rubber band . Plastic belt with oil, acids,

Bases , etc., but for the poor climatic adaptability , slippery and aging. Bandwidth is the main technical parameters of belt conveyors.
② roller
Of single drum ( tape wrap angle on the drum 210 ° ~ 230 °), double drum ( wrap angle of 350 °) and multi- cylinder ( for power ) and so on . There grooved rollers , flat -

shaped roller , spherical roller, roller buffer . Grooved roller ( 2 to 5 of the roller component ) support bearing branch

For conveying granular materials ; aligning roller to adjust the lateral position of the band , to avoid deviation ; buffer roller mounted in place by the material in order to

reduce the impact of the band 's material .
③ drum
Minute drive rollers and idler pulley . Drive rollers of the main power transmission member . Of single drum ( tape wrap angle on the drum 210 ° ~ 230 °), double drum ( wrap

angle of 350 °) and multi- cylinder ( for power ) and so on .
④ tensioning device
Its role is to enable the belt to achieve the necessary tension to prevent slipping on the drive roller, and to the conveyor belt between the deflection roller to ensure within

a predetermined range .

Convex segments belt conveyor Troubleshooting

First, the convex cross section of the central conveyor belt camber
Convex segments belt conveyor belt section often occurs in the direction of the Central bagging, both central bulge. And to make the belt discount, folded after entering bend

pulley or belt drive roller interval belt conveyor design after the extent of damage will intensify . The main reason is bagging with discount transection of the belt

Surface of the central and lateral force per unit length on the value of the difference is belt conveyor manufacturer too large, the central part of the belt slide bagging or discount. Force per unit

length on the size of the difference value and the radius of curvature of the convex sections , roller groove angle. Groove angle, the smaller the radius of curvature of the

convex sections , the more severe camber and discounts .

When the belt conveyor trough angle of greater than or equal to 40 degrees, even in the straight section of the belt conveyor roller head or tail groove angle transition zone

bagging and discounts can also occur at this time should be reduced groove angle or lengthen the transition interval length the distance the belt groove angle slow transition .

For convex segments skin

Belt conveyors should be possible to increase the radius of curvature of the convex sections and transmission capacity to meet the conditions of reduced roller groove angle .
Second, the convex segments snap flat belt conveyor roller and oblique rolls
Belts snap onto rolls of flat roll and helical roller situation generally occurs between the moving bulk materials transport machinery. Such as ship loaders , stackers and

reclaimers . Such equipment cantilever is bent from the root position of the boom are susceptible to this phenomenon. At this time there is also equivalent to a belt convex

segments ,

Due to the geometry size restrictions , it is difficult to achieve a satisfactory transition radius of curvature of the convex section of the required size , the belt conveyor

is located at the root of the cantilever if only through a set of rollers to form two convex segments occurs when the belt Cards nursery rollers inclined flat roll and roller.

The solution

Here is the original one roller group formed two convex segments to forty-five or more groups .

Mine belt conveyors in the production line application

    Belt conveyor is a continuous conveying equipment, has applications in many occasions , such as supermarkets , workshops , etc. These occasions can be said of the belt

conveyor is a relatively small bucket elevators belt conveyor. In coal mines, sand and gravel quarry , metallurgy, chemical industry, construction , building materials and other fields

Together have applied a standard mine belt conveyor , belt conveyor of this type in the production process assume a major role , belongs to a large transportation equipment,

typically used to silo or shaker 90 degree conveyor next affected device transportation of materials, can be up to a few kilometers away , should primarily

With a series of belt conveyor stationary belt conveyor TD75 , DT and large angle belt conveyor belt conveyor .
    TD75 belt conveyor widely used in the coal industry as a belt conveyor is used for conveying bulk , powder, granular or finished material handling equipment over long

distances . Widely applied in metallurgy, mining, coal , power plants, chemical plants, building materials, ports and other industries. Based on the input

Send different processes can stand-alone, multi-level multi-machine Relay transport .
    DT is the original type fixed belt conveyor TD75 type machine , DX two series of belt conveyors unified , replacement new product can be widely used in metallurgy, mining,

coal, ports, power plants , building materials , chemical industry , light industry, petroleum and other industries.
    DJ inclined belt conveyor is a kind of material can be inclined conveyor conveying equipment , conveyor angle ranging from 0 ° ~ 90 ° range. With corrugated sidewall

conveyor belt using the belt and transverse bulkhead in underground mining engineering , open pit mining , large-scale self-unloading peers and have adopted

The belt conveyor equipment can be used for coal, chemical, metallurgy, electric power, light industry, construction , ports and other industries ,

How to make steel cord conveyor belt will make it more long lifetime

Steel cord conveyor belt is mainly used for strength . The rope is the quality of life of the key reasons for the decision belt .
A wire rope conveyor belt to the following four :
1 should have a high breaking strength . High strength steel cord belt strength can be increased . On the other hand , high Flexible skatewheel conveyor strength steel cord , can reduce the diameter of the

rope , belt thickness can be reduced accordingly , in order to achieve size reduction conveyor , the purpose of reducing equipment investment .
2 the steel cord and the rubber has a high adhesion. This is for the use of vulcanized joints of great significance. Improve the industrial belt conveyor adhesion between the rubber rope with the main

measures in the rope surface plating brass and with hard rubber.
3 should have a high fatigue strength , in order to improve life.
4 should have good flexibility, in order to facilitate the operation of conveyor rollers after the change to the bend.

About the process of belt conveyors Some way to deal

Belt conveyor is composed of rhythmic lines are indispensable economic conveying equipment . Belt conveyor can transport a wide variety of materials , can transport all kinds of

bulk material , but also transport all kinds of cartons , bags and other single piece weight small pieces of cargo , in line production purposes

Extremely broad. But the belt 90 degree turn conveyor in the transport of bulk materials in the process of scattering material problems often occur , the following teach you how to deal with

the problem scattering material conveyor belt . 1 belt conveyor transfer points at the scattering material . Point spread reprinted material is mainly down to the belt conveyor

hopper, guide trough

Etc. . Such as roller conveyor severe overload , guide trough gauge rubber apron damaged steel guide trough at design time far away from the belt rubber apron is relatively long,

so that the material out of the guide trough . The situation can be in control of belt conveyors transporting capabilities, strengthen maintenance be solved

. 2 belt conveyor belt vacant when the concave section of scattering material . Concave section belt interval when the radius of curvature smaller concave segment will generate

vacant belt , then the belt into a trough situation changes , because the belt has left the trough idlers , generally groove angle becomes smaller , so that part of the material

spread out .

Therefore, the belt conveyor at the design stage should be possible to use a larger radius of curvature of the concave section to prevent this from happening. If the mobile

mechanical ship loader , stacker-reclaimer device in order to shorten the trailer and the concave section designed here no arc transition interval , when the belt width

selection

Smaller degree than the material easier to spread . 3 belt conveyor belt slipping when the scattering material . The scattering material belt slip because the belt is running

two edge height changes , high side , the other side is low, the low side of the material from spreading out , processing method is to adjust the belt

Slip deviation.

Do security work to ensure stable operation of the conveyor

Improve operational stability conveyors , Power Roller Conveyor domestic industries and enterprises need to solve the primary problem. Domestic conveyor equipment manufacturing enterprises

in the design and production process to increase investment, accelerate innovation, and strive to improve the braking performance of the conveyor motor to ensure the safety

brake conveyor can quickly

Stop . In addition , the installation of the spiral conveyor laying process , the domestic conveyor equipment companies work to be ready for installation , considering the overall

length of the conveyor , height, and the specific load and the conveying speed , according to the work environment , to determine the components of the conveyor quality and

maximum dimension

Inch, to ensure safe and efficient operation of the conveyor . Conveyors in the production process has played a significant role in a wide range of applications, an important

transport production equipment. In recent years , as China 's rapid economic development , chemical metallurgy, coal ports and other industries growing demand for belt conveyors

By belt conveyor for delivering materials to shorten the production cycle, reduce engineering and shorten transport distance , save money, generate significant economic

benefits.

Prevention conveyors situation occurs when

Reasons for deviation 90 degree turn conveyor and processing methods , in addition to some other conveyor condition may also occur , such as conveyor belts appear Ditch . Conveyor appear Ditch

has two aspects: one is formula , on the other processes. The first formula is the formula is the side glue , its current

Of poor gum paste and cover with plastic can not achieve a total cure . Secondly process refers roller conveyor belt material molding process, irregular strip side , top gel process is

not required to do , side glue and there is a gap between the strip , causing the problems mentioned above , and finally the curing process : If more than two parties

Face no problems in the curing process , into the groove width and the compression ratio also appear to grasp unfit ditches and side glue edge Void phenomenon. To avoid conveyor

appear ditches , the most important aspects from the formulations and processes , to achieve excellence, in order to ensure that reduce this phenomenon

Chance .

Roller conveyor What are the main advantages of

Roller conveyor What are the main advantages :
( 1 ) arranged in a flexible , easy segmentation and connections , as needed , by a straight line , arc, horizontal, inclined , branching , merging section and an auxiliary

means such as to form open, closed , planar , three-dimensional and other forms of the delivery route.
( 2 ) versatile , you can press without power type, power type , product release type and other transport means of conveyance or accumulate items that can lift during transport

, move, flip items can be combined with auxiliary devices , according to right-angle , parallel , items up and down , etc. to achieve between the Power Roller Conveyor

Or roller conveyors and other transit between Flexible Roller Conveyor .
( 3 ) facilitate the convergence process equipment and facilities, Cohesion simple compact process equipment can sometimes be used directly as the input and output sections of

material . The gap between the parts of the rollers are arranged to facilitate a variety of devices and equipment.
( 4 ) Items transmission smooth , easy on the auxiliary send items during processing, assembly, testing , sorting , packaging, storage chips of various process operations,

facilitate the delivery process to achieve automatic control.
( 5 ) the two roller conveyor connecting small size , smaller size can transport items.
( 6 ) or double rows of roller conveyor transporting bulky items can be side by side the roller conveyor.
( 7 ) capable of delivering high-temperature materials.
( 8 ) roller conveyor standardization, serialization, universal high degree of easy assembly composed of different production lines , but does not require special civil

foundation .

Contrast packaging machinery and transportation machinery

Packaging machinery and transport machinery can be said to produce large products essential part of the product through the packaging before sending arrive via airport conveyor line packaging machinery transport links and other aspects of the combination again. Thereby producing a molded product. Can be described as just right. Let Jane

Park's first volume curve conveyor it!
Conveyor first volume: Conveyor and serialization using scales designed to fit the material used in various industries open delivery. The machine driven by the drive roller conveyor conveying materials, conveyor belt supported on the level of care in a group, V-shaped roller or plate, conveyor belt can be

Food and non-food grade PVC ring light nylon tape or a rubber band, with a light and durable, reasonable structure, beautiful shape, used to facilitate the characteristics of the chassis can lift can be fixed, horizontal conveyor can also be inclined conveyor conveying equipment The material can be carbon steel, stainless steel or aluminum

Gold. To ensure cleanliness and durability of the belt, such devices can be designed with a belt cleaner tensioner and the belt speed, the conveyor can be necessary to install a variety of baffles, chute and spillage trays, but also in install a variety of printing equipment and testing equipment. The Department

Column device can transport bulk material, but also transport materials packaged bags, bags, boxes, etc.

Conveyor types of materials commonly used in the skeleton and performance

Reinforcing materials for rubber products is to carry from the internal and external forces, improve the strength of rubber products, and limit the deformation. It largely

determines the performance of rubber products, service life and value in use. Skeletal material from the textile fibers (including day

Natural fibers and chemical fibers), wire, glass fiber processing is made. The fabric core and steel cord conveyor belt, the Incline Belt conveyor has been developed out of cotton

canvas, synthetic canvas belt has excellent strength properties gradually from straight through straight weft fabric conveyor belt for

Generations, straight through straight weft fabric roller conveyor fabric conveyor belt total production accounted for 10% to 20%; high strength (breaking strength of not less

than 2000kN / m) multi-use steel cord conveyor belt structure, steel cord conveyor belt production accounts for about 25% of total output conveyor. The traditional factors,

China's cotton canvas conveyor belt production still accounts for about 25% of total output, while the steel cord conveyor belt production accounted for only 15%, straight

through straight weft fabric conveyor belt research is still in its infancy [2]. Currently, the world's most advanced production technology tape is Europe, America, Japan and

other countries and regions

Industrial group monopoly. In recent years, most of the excess capacity in industrialized countries, while Asia has become the world's industrial development hot spot, known as

the world's factory. Our efforts to expand domestic demand and stimulate economic growth, especially in increasing water conservancy, agriculture, energy and urban

infrastructure construction

Let's macro-control policy inputs, stimulating economic growth in the transport sector; Meanwhile, China's coal, metallurgy, electric power, and ports and other areas of

improved operating conditions, increasing the demand for a variety of purposes conveyor. According to the coal industry and metallurgical industry statistics, in 2005 the major

industrial

Field of conveyor demand of 90 million m2, of which, 35% coal, 25% of metallurgy, ports 22%, chemical building materials 12%, other 6%; export volume of 5,000,000 m2.

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.

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.

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.