One of the problems of screw conveyor in conveying materials is material blocking. Once the blockage occurs, it will seriously affect the conveying efficiency of screw conveyor, and even cause the internal damage of screw conveyor. There are many reasons for blockage, and the following emergency measures can be taken to prevent blockage.

　　Screw conveyor is mainly used for horizontal or inclined conveying and vertical conveying of granular, powdery and small pieces of materials. Its conveying interval is from 2m to 70m, with various specifications, and can be made according to customer requirements. One of the problems of conveyor in conveying materials is material blocking. Once the blockage occurs, it will seriously affect the conveying efficiency of screw conveyor, and even cause the internal damage of screw conveyor. There are many reasons for blockage, and the following emergency measures can be taken to prevent blockage.

　　Emergency solution for blocking of screw conveyor

　　First of all, the screw conveyor is added to the discharge port or the end of the lengthening chute to solve the problem of poor discharge or too late discharge. At the same time, a small section of counter rotating blade can also be installed at the end of the material chute at the outlet to prevent blocking at the end. For example, the rotation speed of the slow screw conveyor should not be too high. Strictly carry out the damage rules, achieve no-load start and no-load parking; ensure the continuous and average feeding; clean the materials entering the conveyor to prevent large impurities or fiber impurities from entering the machine and causing blockage. The automatic control and alarm are realized by installing the bin level indicator and blocking sensor, and an anti blocking valve is set on the cover plate of the discharging end. The transverse dimension of the middle hanging bearing should be reduced as much as possible to reduce the possibility of blocking when the material passes through the middle bearing.

　　The material entering into the conveyor should be cleaned up to prevent large impurities or fibrous impurities from entering the machine and causing blockage. The automatic control and alarm can be realized by installing the bin level indicator and blocking sensor. Increase the outlet or lengthen the end of the chute to solve the problem of poor discharge or too late discharge. At the same time, a small section of counter rotating blade can be installed at the end of the material groove at the outlet to prevent blocking at the end.

　　An anti blocking valve is arranged on the cover plate of the discharging end. In case of blockage, due to material accumulation, open the anti blocking door and block the power supply through the travel switch. The transverse dimension of the middle hanging bearing should be reduced as much as possible to reduce the possibility of blocking when the material passes through the middle bearing. Reasonable selection of technical parameters, such as slow speed should not be too large. Strictly carry out the operation procedures, achieve no-load start, no-load parking; ensure continuous and average feeding.

　　Screw conveyor is a kind of continuous material conveying machinery. There are many kinds of continuous conveyors because of their different working principles, structural characteristics, conveying methods and directions, and a series of other characteristics. In the design of screw conveyor, the productivity and power of screw conveyor are determined mainly according to the nature of conveying materials, conveying capacity, conveying distance, conveying inclination angle and screw speed. There are two main types of design parameters. One is design constant, which is known data or pre-determined parameters according to objective laws and specific conditions. The other is design variables, which are changeable structural parameters to be determined in design.

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