The bucket type progress machine includes several types such as belt bucket type progress machine, plate chain bucket type progress machine, chain bucket type progress machine, etc. It is a vertical progress equipment widely used in agricultural product processing plants and grain bureaus. It has the advantages of high progress height, stable progress, small footprint, and excellent sealing performance, and is suitable for transporting powdered and small block materials.
 
The following are several common drawbacks of this device in the application process:
 
1. The hopper belt slips
 
(1) The bucket type progressive machine uses the resistance torque between the hopper belt and the head wheel drive shaft to lift materials. If the hopper belt is not tensioned, it will cause the hopper belt to slip. At this point, the machine should be stopped immediately and the tensioning equipment should be dispatched to tighten the hopper belt. If the tensioning equipment cannot fully tension the hopper belt, it indicates that the travel of the tensioning equipment is too short and should be scheduled from scratch.
 
The accurate solution is to untie the hopper belt joint, adjust the tensioning device on the bottom wheel to the highest position, insert the hopper belt from the head of the progressive machine, pass through the head wheel and bottom wheel, and connect the head and tail, 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 scheduling screw of the tensioning equipment should not be less than 50% of the full stroke.
 
(2) When the progress machine 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 the defect should be cleaned up.
 
(3) The inner surfaces of the head wheel drive shaft and the hopper belt are too smooth, which reduces the resistance 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 the resistance.
 
(4) The bearings of the head and bottom wheels do not roll properly, resulting in increased resistance torque and causing the hopper belt to slip. this
 
It can be disassembled, washed, oiled or replaced with bearings.
 
2. The hopper belt runs off center
 
(1) The misalignment of the head and bottom wheel transmission shaft equipment 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 positioned horizontally 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. It should be stopped immediately to eliminate the shortcomings. Ensure that the transmission shaft equipment of the head wheel and bottom wheel are in the same vertical plane, and both are in a horizontal orientation. The vertical error of the centerline of the whole machine at a height of 1000mm should not exceed 2mm, and the stacking error should not exceed 8mm.
 
(2) The improper connection of the hopper belt refers to the situation where the edges of the hopper belt are not in the same straight line after being connected. When working, the hopper belt is tightened and loosened at the same time, causing the hopper belt to move laterally towards the tight edge, resulting in deviation, insufficient material loading, incomplete unloading, increased material return, reduced production rate, and in severe cases, the hopper belt may become stuck or torn. At this time, the machine should be stopped, the connector should be modified and connected properly.
 
3. Excessive material return
 
Progressive machine feed back refers to the phenomenon where materials are not completely discharged from the machine in the discharge direction, but some materials return to the progressive machine base. In progressive work, if there is too much material return from the progressive machine, it will inevitably reduce production power, increase power consumption and material crushing rate. The elements that make up the majority of recycled materials are as follows:

(1) The working speed of the hopper is too fast, and the progress of the machine is different for different materials. The working speed of the hopper is different: generally, when progressing monotonous powder and granular materials, the speed is about 1-2m/s; When advancing block materials, the speed is 0.4~0.6m/s; When advancing moist powders and granules, the speed is 0.6~0.8m/s. Excessive speed leads to early unloading, resulting in material return. At this point, the speed of the hopper should be appropriately reduced based on the progress of the material to avoid material return.

(2) The discharge tongue plate equipment at the head outlet is not suitable, as the tongue plate is too far away from the discharge direction of the hopper, which will result in material return. The orientation of the tongue plate should be adjusted in a timely manner to avoid material return.
 
4. The hopper falls off
 
Hopper dropping refers to the phenomenon where the hopper falls off the hopper belt during production. When the hopper falls, there will be abnormal noises. It is necessary to stop the machine for inspection in a timely manner, otherwise it will cause more hoppers to deform and fall; In the direction of connecting the hopper, the hopper belt is torn. The primary factors causing hopper dropping are:

(1) Excessive feeding leads to the accumulation of materials in the machine base, increasing the lifting resistance and causing the hopper to malfunction, which is the direct factor causing the hopper to fall and deform. 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 orientation 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 orientation 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, forming a hopper scooping up the material. And if the material is in the form of blocks, it can easily cause the hopper to deform and fall off. At this point, the orientation of the feed inlet should be adjusted above the centerline of the bottom wheel.
 
(3) The raw materials in the hopper are poor and the strength is limited. The hopper is the load-bearing component of the progressive machine and has high requirements for its materials. When selecting equipment, materials with good strength should be selected 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 wire to enhance the strength of the hopper.
 
(4) During production, if the accumulated material in the machine base is not completely removed when starting up, sudden power outages or other factors that cause the machine to shut down are often encountered. If the accumulated material in the machine base is not completely removed when starting up again, it is easy to cause the hopper to crack and fall due to excessive impact. Therefore, it is necessary to eliminate the accumulated physics inside the machine base between shutdown and startup to avoid the hopper falling off. Other than that, regularly check whether the connection between the hopper and the hopper belt is robust. If loose or detached screws, tilting or damage of the hopper are found, they should be repaired or replaced in a timely manner to prevent bigger incidents from happening.
 
5. The hopper belt is torn
 
The hopper belt of the progressive machine is usually canvas belt, and sometimes tape and chain are also used. Under the induction effect of various drawbacks, canvas and adhesive tapes are prone to tearing, which is one of the most serious drawbacks. The deviation of the general hopper belt and the dropping process of the hopper are the simplest causes of the hopper tearing. All elements should be promptly identified and shortcomings eliminated. Other than that, the inclusion of sharp edged foreign objects in object guessing 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.


Article compilation: Guangdong bucket elevator www.zs-chsb.com