Bucket elevator manufacturer

1、 Introduction

The bucket elevator has significant advantages such as large conveying capacity, high lifting height, stable and reliable operation, and long service life. Its main performance and parameters comply with JB3926-85 "Vertical Bucket Elevator" (which is equivalent to referring to international standards and advanced foreign standards), and the traction ring chain complies with MT36-80 "High Strength Ring Chain for Mining". This elevator is suitable for conveying powdery, granular, and small block materials without abrasion or with low abrasion, such as coal, cement, stones, sand, clay, ores, etc. Due to the traction mechanism of the elevator being a circular chain, it is allowed to transport materials with higher temperatures (material temperature not exceeding 250 ℃). The general conveying height can reach 40 meters. The TG type can reach a height of up to 80 meters.

The bucket elevator is suitable for lifting from low to high, and the supply material is fed into the hopper through the vibration table, and the machine automatically runs continuously to transport upwards. The conveying speed can be adjusted according to the conveying capacity, and the lifting height can be selected as needed. The hopper is self-designed and manufactured, and the PP non-toxic hopper makes this type of bucket elevator more widely used. All sizes are designed and manufactured according to actual needs. It is designed to be matched with vertical packaging machines and computer measuring machines, suitable for lifting and feeding products such as food, medicine, chemical industry products, screws, nuts, etc. The automatic stop and start of the machine can be controlled by the signal recognition of the packaging machine.

A bucket elevator is a continuous conveying machinery that uses a series of hoppers uniformly attached to an endless traction component to vertically lift materials. It is divided into three types: loop chain, plate chain, and belt.

2、 Working principle

The hopper scoops up the material from the storage below, and as the conveyor belt or chain lifts it to the top, it flips down after passing around the top wheel. The bucket elevator pours the material into the receiving trough. The transmission belt of a bucket elevator with belt drive is generally made of rubber belt, which is installed on the lower or upper transmission drum and the upper and lower reversing drums. A bucket elevator with chain drive is generally equipped with two parallel drive chains, with a pair of drive sprockets on the top or bottom and a pair of reversing sprockets on the bottom or top. Bucket elevators are generally equipped with a casing to prevent dust from flying in the bucket elevator.

3、 Main components

The bucket elevator consists of a housing, a traction component (conveyor chain), a hopper, a driving wheel (head wheel), a reversing wheel (tail wheel), a tensioning device, a guiding device, a feeding port (inlet), and a discharging port (outlet).
1. Hopper

a. Cylindrical bucket:

The deep bucket and bucket mouth are inclined at 650 degrees, with a large depth, used for conveying granular materials that are dry, have good fluidity, and can be easily scattered.

Shallow hopper: The mouth is inclined at 450 degrees, with a small depth, used for moist and flowing granular materials.

Deep hopper: Generally, materials in deep hoppers are relatively dry and have good flowability.

Triangle hopper: The material is generally discharged in a directional self flow manner.

b. Sharp angled bucket: Its side wall extends to the outside of the bottom plate, becoming a blocking edge. When unloading, the material can be discharged along the groove formed by the blocking edge and bottom plate of a bucket, suitable for transporting viscous and heavy block materials.

2. Traction components

(1) Rubber tape: fixed to the tape mouth with screws and elastic washers, with a width of 35-40mm wider than the bucket. Generally, the tape can transport materials with a temperature not exceeding 60 ℃, while heat-resistant tape can transport materials up to 150 ℃.

(2) Chain: The single chain is fixedly attached to the back wall of the hopper; The double chain is connected to both sides of the hopper. When the hopper width of the chain hoist is 160-250mm, a single chain is used, and when the hopper width is 320-630mm, a double chain is used. The main disadvantage is that the wear between the chain links is large, which increases the frequency of maintenance.

3. Chain wheel

The transmission sprocket on the bucket elevator. Chain wheels are used to mesh with accurately spaced blocks on chain links or cables, and are solid or spoke gears that mesh with roller chains to transmit motion.

The design of the tooth profile of the sprocket: The tooth profile of the sprocket must ensure that the chain can enter and exit meshing smoothly and freely, minimize the impact and contact stress of the chain links during meshing, and be easy to process. The sprocket material should ensure that the teeth have sufficient strength and wear resistance, so the sprocket tooth surface is generally heat-treated to achieve a certain hardness.

4、 Main features

1. Low driving power, adopting inflow feeding, induction unloading, and large capacity hopper dense layout There is almost no material return or excavation during material lifting, so there is less ineffective power.

2. The lifting range is wide, and this type of lifting machine has fewer requirements for the types and characteristics of materials. It can not only lift general powder and small particle materials, but also improve materials with high grinding properties Good sealing and minimal environmental pollution.

3. Good operational reliability, advanced design principles and processing methods ensure the reliability of the entire machine, with a fault free time exceeding 20000 hours. Raise the height high The hoist runs smoothly, so it can achieve a high lifting height.

4. Long service life, the feeding of the elevator adopts an inflow type, without the need for digging with a bucket, and there is little squeezing and collision between materials. This machine is designed to ensure that materials are less scattered during feeding and unloading, reducing mechanical wear and tear.

5、 Installation requirements

1. The bucket elevator must be firmly installed on a sturdy concrete foundation. The surface of the concrete foundation should be flat and horizontal to ensure that the bucket elevator meets the vertical requirements after installation.

A bucket elevator with a higher height should be connected to adjacent buildings (such as silos, workshops, etc.) at appropriate positions on the middle and upper casings to increase its stability. When installing, first install the lower components, fix the anchor bolts, then install the middle casing, and finally install the upper casing. The installation of the casing has been successful, and the verticality has been corrected. Measure with a straight lead line at full height, with an error of less than 10mm. The upper and lower axes should be parallel, and their axis lines should be in the same plane.

When installing a bucket elevator with a lower height, the upper, middle, and lower casings can be connected and aligned perfectly on the ground level, and then lifted and fixed as a whole on a concrete foundation.

2. After installing the casing, install the chain and hopper. The U-shaped screw used for connecting the hopper serves as both a chain joint and a fixing component for the hopper. The nut of the U-shaped screw must be tightened and reliably prevented from loosening.

3. After installing the chain and hopper, tighten them appropriately.

4. Add appropriate amounts of engine oil and grease to the reducer and bearing seat respectively. The reducer is lubricated with industrial gear oil. Calcium based or sodium based butter can be used inside the bearing seat.

5. Trial operation should be carried out immediately after installation. Attention should be paid to air transportation: it cannot be reversed and there should be no collision. The air running time should not be less than 2 hours, and there should be no overheating phenomenon. The temperature rise of the bearing should not exceed 250C, and the temperature rise of the reducer should not exceed 300C. After 2 hours of air running, everything should be normal before the load test can be carried out. During the load test, the feeding should be uniform to prevent excessive feeding and blockage of the lower part, which may cause "stuffiness".

6、 Maintenance and upkeep

1. The bucket elevator should be driven with no load. So before stopping each time, all the materials in the hopper should be drained before stopping.

2. Cannot be reversed. Reversing may cause chain derailment, and troubleshooting derailment is very difficult.

3. Feed evenly. Do not suddenly increase the feeding amount. The feeding amount cannot exceed the conveying capacity of the elevator. Otherwise, it is easy to cause serious accumulation of materials at the bottom, resulting in a "stuck car" accident.

4. Timely and appropriately replenish lubricating oil.

5. When the chain and hopper are severely worn or damaged, they should be replaced in a timely manner.

6. Improper installation of the transmission shafts for the lifting head wheel and bottom wheel can easily cause the hopper belt to deviate. The main manifestation is that the transmission shafts for the head wheel and bottom wheel are in the same vertical plane and not parallel; Both transmission shafts are installed in a horizontal position and not in the same vertical plane; The two transmission shafts are parallel, in the same vertical plane, and not horizontal. After the above situation occurs, the hopper belt may deviate, which can easily cause collision between the hopper and the barrel, and tearing of the hopper belt. In addition, due to long-term and high-intensity continuous operation of the raw material storage lifting machine head wheel, local bulging, delamination, wear and other problems often occur in the rubber tile part of the head wheel, which poses hidden dangers to the production of the enterprise during long-term operation with defects. The price of belts and equipment components is relatively high, and traditional methods cannot achieve short-term on-site repair, which brings great difficulties to enterprises.

Once such problems occur, general repair methods are difficult to solve. Disassembly, replacement, lifting, and transportation are time-consuming and laborious, resulting in significantly prolonged downtime and increased labor intensity for workers, causing irreparable economic losses to the enterprise. Western countries mainly use polymer composite materials to deal with such problems, among which the widely used is the Fukushi Blue technology system. Polymer composite materials, with their excellent mechanical properties and good adhesion, have successfully solved this problem. Not only can it extend the service life of equipment and improve productivity, but it can also effectively avoid the secondary possibility of this problem without occupying additional downtime, providing continuous production support for enterprises.

7、 Regulations

1. The elevator is maintained and managed by designated personnel, and the key to the power switch box is managed by designated personnel.

2. The hoist must have a hoist limiter and a travel limiter, and the limiter should enable the pulley to automatically stop before lifting to a distance of 300mm from the drum or pulley.

3. The hoist should have a load mark, and the weight should not exceed the load limit (1T) during lifting and landing.

4. After power transmission, check the winch limiter, travel limiter, interlock switch and other devices for sensitive and reliable operation, and conduct a trial lifting.

5. Before lifting or landing, the car can only be driven after sounding the alarm bell.

6. Elevators are strictly prohibited from carrying people up and down.

7. After the work is completed, the lifting platform of the hoist should land, then cut off the power and close the upper and lower guardrail doors.

8. Regularly maintain the hygiene of the surrounding environment of the elevator.

8、 Basic requirements

1. The hoist shall comply with the requirements of JC460.1 and this standard, and shall be manufactured, installed, and used in accordance with the approved design drawings and technical documents through the prescribed procedures. Technical requirements not specified in the drawings and technical documents shall be implemented in accordance with relevant general standards in the building materials machinery, electromechanical industry, etc

2. The deviation of tolerance dimensions not indicated on the drawing shall comply with the provisions of GB 1804, where the machined surface is of tTl3 grade; The non machined surface of the welded parts is ITl6 grade; The non machined surface of the forged parts is manufactured at ITl5 level

3. Welding components shall comply with the relevant regulations for welding of building materials machinery

4. Gray iron castings shall comply with the provisions of GB 9439

5. Forged parts shall not have defects such as interlayer, folding, cracking, satin damage, scarring, slag inclusion, etc

6. The hoist should be equipped with a level gauge, speed monitor, and tape anti deviation device.

9、 Equipment modification

As a widely used vertical conveying equipment, bucket elevators have been widely used in the grain, feed, and seed processing industries. However, some issues have also arisen during use, and improvements have been made to enhance its performance and reliability.

1. An anti reverse device is installed at the head of the bucket elevator. When the power is suddenly interrupted during the operation of a bucket elevator, reversing is very dangerous for the bucket elevator. During the lifting process of a bucket elevator, one side is an upward bucket filled with materials, and the other side is a downward empty bucket after unloading materials. After power interruption, the bucket elevator will inevitably reverse due to gravity. The material is unloaded to the bottom of the bucket elevator as the bucket rotates, until it becomes full and the bucket is stuck. Due to the fact that reversing is an accelerated motion, and then suddenly getting stuck, it is easy to tear off the dustbin, causing damage to the belt or even breakage. In addition, the bottom of the bucket elevator is filled with materials, which also prevents the bucket elevator from starting. Anti reversal can be achieved by using a ratchet mechanism.

2. There should be suction ducts and ventilation openings at the head and bottom of the bucket elevator to ensure that negative pressure and dust overflow are not formed during the unloading and feeding processes of the bucket elevator. A well made conveying equipment must have reliable sealing. However, good sealing will inevitably generate pressure differences during material unloading and feeding processes, causing difficulties in feeding and unloading. The ventilation opening ensures that the internal pressure of the bucket elevator is basically equal to the external pressure. Proper ventilation should be used to prevent dust from overflowing from the ventilation area, avoid waste, and clean the environment.

10、 Common Categories

1. As a commonly used lifting equipment, bucket elevators have been widely used and classified according to the requirements of different industries. They can be divided into:

(1) TD series bucket elevator

Its specifications include TD100 (rarely used), TD160, TD250, TD315, TD400, TD500, TD630, TD800, TD1000 and other models, among which TD160, TD250, TD315 and other models are commonly used

(2) TH series bucket elevator

The TH series bucket elevator is a commonly used lifting equipment, which uses forged ring chains as the transmission part and has strong mechanical strength. It is mainly used to lift powder, small particles, and small block materials. Unlike the TD series bucket elevator, it has a larger lifting capacity and higher operating efficiency. It is commonly used for lifting materials with higher specific gravity.

(3) NE series plate chain bucket elevator

The NE series plate chain bucket elevator is a new type of bucket elevator that uses plate chain transmission. Unlike the old model TB series plate chain bucket elevator, it is named after the lifting amount rather than the bucket width. NE150 refers to a lifting capacity of 150 tons per hour instead of a bucket width of 150. The NE series bucket elevator has high efficiency and is divided into NSE model and high-speed plate chain bucket elevator according to different lifting speeds.

(4) TB series bucket elevator

The TB series bucket elevator is an older model of bucket elevator, and its transmission part adopts plate chain transmission. It has now been replaced by corresponding NE series bucket elevator products.

(5) TG series bucket elevator

The TG series bucket elevator is a reinforced tape bucket elevator, which is different from the TD series bucket elevator. The TG series bucket elevator uses steel wire tape as the transmission belt, which has stronger transmission capacity. This series of bucket elevators is commonly used in grain transportation and is also known as grain specific bucket elevators.

(6) Other models of bucket elevators

Common models of bucket elevators include HL series chain bucket elevators, GTD series bucket elevators, and PTH series bucket elevators, all of which are different names and evolved forms of the previous models.

2. According to the different running speeds of the hopper, bucket elevators can be divided into three forms: centrifugal unloading, gravity unloading, and mixed unloading

3. A bucket elevator is a continuous conveying machinery that uses a series of hoppers uniformly attached to an endless traction component to vertically lift materials. It is divided into three types: loop chain, plate chain, and belt.

11、 Precautions

The bucket elevator is used to vertically lift block and granular materials such as limestone, coal, gypsum, clinker, dry clay, as well as powdered materials such as raw materials, cement, and coal powder that have passed through the crusher. According to the speed of the hopper operation, bucket elevators can be divided into three forms: centrifugal unloading, gravity unloading, and mixed unloading. Centrifugal unloading has a fast bucket speed and is suitable for conveying materials with low grinding properties such as powder, granular, and small pieces; The bucket speed of gravity unloading is slow, suitable for conveying block shaped, high specific gravity, and highly abrasive materials such as limestone and clinker. The traction components of bucket elevators include ring chains, plate chains, and adhesive tapes. The structure and manufacturing of the chain are relatively simple, and the connection with the hopper is also very firm. When conveying materials with high abrasiveness, the wear of the chain is small, but its own weight is large. The plate chain structure is relatively sturdy and has a light weight, making it suitable for elevators with large lifting capacity. However, the hinged joints are prone to wear, and the structure of the adhesive tape is relatively simple, but it is not suitable for conveying materials with high abrasiveness. The temperature of ordinary adhesive tape materials does not exceed 60 ° C, steel rope tape allows material temperature to reach 80 ° C, heat-resistant tape allows material temperature to reach 120 ° C, and the temperature of materials conveyed by ring chains and plate chains can reach 250 ° C.

12、 Model selection

As a commonly used lifting equipment, the selection of bucket elevators is constrained by many factors, and choosing the wrong model can bring endless trouble to the user. The selection of bucket elevator generally depends on the following factors:

1. The form of the material: whether the material is in powder, particle, or small block form.

2. Physical properties of materials: whether the material has adsorption or viscosity, and whether it contains water.

3. Specific gravity of materials: Generally, the parameters of bucket elevators are designed and calculated for materials with a stacking density of 1.6 or less. For materials with a density that is too large, calculations of traction force and tensile strength of the transmission part are required.

4. Transport volume per unit time.

The form of the material directly determines the unloading method of the material. The common rule is that powdery materials are unloaded by centrifugal ejection, and block materials are unloaded by gravity. The different unloading methods determine the different hopper forms used by the bucket elevator. Centrifugal ejection unloading often uses shallow buckets and arc-shaped buckets, while gravity unloading requires deep buckets. The material conveying capacity per unit time varies depending on the type of hopper used in the bucket elevator. The conveying capacity of a bucket elevator is a comprehensive parameter that depends on the hopper form, hopper speed, material density, material properties, and the number of hoppers. The selection process is as follows: material density → transmission mode (bucket lifting model) → material properties → unloading method → hopper form → lifting capacity of the series of bucket elevators → determining the model.

13、 Common faults

Bucket elevators include belt bucket elevators, plate chain bucket elevators, chain bucket elevators, and other types of vertical lifting equipment widely used in agricultural product processing plants and grain bureaus. They have the advantages of large lifting height, stable lifting, small footprint, and good sealing, and are suitable for lifting powdered and small block materials.

The following are several common malfunctions of the device during use

1. The hopper belt slips

(1) The bucket elevator uses the friction torque between the hopper belt and the head wheel drive shaft to lift materials. If the tension of the hopper belt is insufficient, it will cause the hopper belt to slip. At this point, the machine should be stopped immediately and the tensioning device adjusted to tighten the hopper belt. If the tensioning device cannot fully tension the hopper belt, it indicates that the stroke of the tensioning device is too short and should be readjusted.

The correct solution is to disconnect the hopper belt joint, adjust the tension device on the bottom wheel to the high position, insert the hopper belt from the elevator head, pass through the head wheel and bottom wheel, and connect the head and end of the belt, so that the hopper belt is in a tensioned but not tensioned state. Then fully tighten the tensioning device. At this time, the unused tensioning stroke of the adjusting screw of the tensioning device should not be less than 50% of the full stroke.

(2) When the hoist is overloaded, the resistance torque increases, causing the hopper belt to slip. At this point, the feeding amount of materials should be reduced and efforts should be made to ensure even feeding. If the slip cannot be improved even after reducing the feeding amount, it may be due to excessive material accumulation in the machine seat or the hopper being stuck by the guide material. The machine should be stopped for inspection and troubleshooting.

(3) The inner surfaces of the head wheel drive shaft and the hopper belt are too smooth, which reduces the friction between the two and causes the hopper belt to slip. At this point, a layer of adhesive can be applied to the inner surface of the drive shaft and hopper belt to increase friction.

(4) The head and bottom wheel bearings do not rotate properly, resulting in increased resistance torque and causing the hopper belt to slip. At this point, you can disassemble, wash, add oil or replace the bearings.

2. Hopper belt deviation

(1) The improper installation of the head and bottom wheel transmission shafts is mainly reflected in the following aspects: firstly, the transmission shafts of the head and bottom wheels are in the same vertical plane and not parallel; Secondly, both transmission shafts are installed in a horizontal position and not in the same vertical plane; The third is that the two transmission shafts are parallel, in the same vertical plane, and not horizontal. At this point, the deviation of the hopper belt can easily cause collision between the hopper and the barrel, as well as tearing of the hopper belt. The machine should be stopped immediately to troubleshoot. Ensure that the transmission shafts of the head and bottom wheels are installed in the same vertical plane and in a horizontal position. The vertical deviation of the machine centerline at a height of 1000mm should not exceed 2mm, and the accumulated deviation should not exceed 8mm.

(2) The hopper belt joint is not aligned, which means that after the hopper belt is combined, the edge lines of the hopper belt are not on the same straight line. When working, the hopper belt is tightened and loosened on one side, causing the hopper belt to move laterally towards the tight side, resulting in deviation, insufficient material loading in the hopper, incomplete unloading, increased material return, decreased productivity, and in severe cases, causing the hopper belt to jam or tear. At this time, the machine should be stopped, the connector should be corrected and connected properly.

3. Excessive material return

Elevator return refers to the phenomenon where materials are not completely discharged from the machine at the discharge position, but some materials return to the elevator base. In lifting operations, if there is too much material return from the hoist, it will inevitably reduce production efficiency, increase power consumption and material crushing rate. There are several reasons for excessive material return: (1) The hopper runs too fast, and the elevator lifts different materials at different speeds. Generally, when lifting dry powder and granular materials, the speed is about 1-2m/s; When lifting block materials, the speed is 0.4-0.6m/s; When lifting wet powders and granules, the speed is 0.6-0.8m/s. Excessive speed leads to early unloading, resulting in material return. At this time, the speed of the hopper should be appropriately reduced according to the lifted material to avoid material return.

(2) The installation of the discharge tongue plate at the head outlet is not suitable, and the tongue plate is too far away from the discharge position of the hopper, which can cause material return. The position of the tongue plate should be adjusted in a timely manner to avoid material return.

4. The hopper falls off

Hopper detachment refers to the phenomenon of the hopper falling off the hopper belt during production. When the hopper falls, it will produce abnormal noise. It is necessary to stop the machine for inspection in a timely manner, otherwise it will cause more hoppers to deform and fall off; At the position where the hopper is connected, the hopper belt is torn. The main reasons for hopper detachment are:

(1) Excessive feeding can cause material accumulation in the machine base, increase lifting resistance, and hinder the operation of the hopper, which is the direct cause of hopper detachment and deformation. At this time, the machine should be stopped immediately, the lower insertion plate of the machine base should be removed, the accumulated material in the machine base should be discharged, a new hopper should be replaced, and then the production can be started again. At this point, reduce the feeding amount and strive for uniformity.

(2) The position of the feed inlet is generally too low, and during production, the hopper automatically takes in the material coming in from the feed inlet. If the position of the feeding port is too low, it will cause the hopper to not be able to take up the material in time, and most of the material will enter the machine base, causing the hopper to scoop up the material. And if the material is in the form of blocks, it is easy to cause deformation and detachment of the hopper. At this point, the feeding port position should be adjusted above the centerline of the bottom wheel.

(3) The material of the hopper is not good and its strength is limited. The load-bearing components of the hopper elevator have high requirements for its material. When installing, it is recommended to choose materials with good strength as much as possible. Generally, the hopper is welded or stamped from ordinary steel plates or galvanized sheets, and its edges are folded or rolled with lead wires to enhance the strength of the hopper.

(4) During production, if there is no accumulated material in the machine base when starting up, it is common to encounter sudden power outages or other reasons that cause the machine to shut down. If the accumulated material in the machine base is not cleared when starting up again, it is easy to cause the hopper to break and fall off due to excessive impact. Therefore, between shutdown and startup, it is necessary to clean the accumulated physics inside the machine base to avoid the hopper falling off. In addition, regularly check whether the connection between the hopper and the hopper belt is firm. If loose or detached screws, skewed or damaged hoppers are found, they should be repaired or replaced in a timely manner to prevent larger accidents from occurring.

5. The hopper belt is torn

The hoist hopper belt is usually a canvas belt, and sometimes tape and chains are also used. Under the combined effect of various faults, canvas and tape are prone to tearing, which is one of the serious faults. The process of deviation and detachment of the general hopper belt can easily cause tearing of the hopper. It is necessary to promptly and comprehensively investigate the cause and eliminate the fault. In addition, the inclusion of foreign objects with sharp edges in the material can also cause the hopper belt to crack. Therefore, in production, steel wire mesh or magnet should be installed at the feed inlet to prevent large foreign objects from falling into the machine base.

6. Abnormal sound occurs during operation

(1) The bottom plate of the bucket elevator base collides with the chain bucket, adjust the tension device of the base to tighten the chain.

(2) The transmission shaft and driven shaft keys are loose, the sprocket is displaced, and the chain bucket collides with the casing. Adjust the sprocket position and tighten the key.

(3) Adjust the position of the guide plate as it collides with the chain bucket.

(4) There is material sandwiched between the guide plate and the chain bucket, and the material feeding angle of the enlarged machine base is enlarged.

(5) The bearing has malfunctioned and cannot operate flexibly. The bearing should be replaced.

(6) If the material block or other foreign object gets stuck inside the machine base shell, stop the machine and remove the foreign object.

(7) The tooth profile of the sprocket (drive, driven sprocket) is not correct, correct the sprocket tooth profile or replace the sprocket.

(8) Poor tooth disengagement between the transmission sprocket and chain, correct the tooth profile of the transmission sprocket.

(9) The transmission chain is spinning, adjust the chain length.

(10) Incorrect installation of the casing, adjust the verticality of the entire length of the casing.

7. Motor base vibration

(1) The motor itself is not rotating properly. Remove the rotor to check the static balance.

(2) The installation accuracy of the reducer and the motor is poor, and the alignment exceeds the specifications. It needs to be readjusted.

(3) The installation accuracy of the motor base is insufficient and the levelness exceeds the specification requirements. It needs to be readjusted.

(4) The installation of the transmission sprocket has errors and needs to be readjusted.

(5) The tooth profile of the transmission sprocket is poor and needs to be corrected.

(6) The tightness of the transmission sprocket is not appropriate and should be adjusted again.

8. Leakage of dust

(1) The sealing gasket of the flange section of the entire casing is damaged or missing. Replace the gasket with a new one, apply sealant, and tighten the flange bolts again.

(2) The material leaks out from the gaps of the machine head and base, and sealing gaskets or sealant should be added.

(3) The height difference of the input materials is too large, which increases the feeding pressure. It is necessary to change the material input method and increase the feeding buffer device.

9. The increase cannot reach the design capability

(1) The material is bonded to the chain hopper and slider, and the material is cleaned regularly according to the degree of bonding.

(2) The front mechanical equipment of the hoist has insufficient capacity, resulting in a low amount of material input and the hoist cannot reach its design capacity. It is necessary to find ways to improve the production capacity of the front equipment

(3) The speed increase is slow, and the speed ratio of the transmission sprocket needs to be changed.

(4) Improper material measurement method or measurement error, check the measuring instrument, verify the specific gravity of the material, and revise the calculation method.

10. Insufficient discharge of materials

(1) The mechanical equipment at the rear of the hoist has limited capacity, causing blockage of the discharge chute and increasing the production capacity of the mechanical equipment at the rear.

(2) The discharge chute is too small or the angle of the chute is not suitable, correct the discharge chute.

(3) The material adheres to the chain bucket and slider and needs to be cleaned regularly.