Anti-blocking Operation Tips for LSY Cement Screw Auger Conveyor
The LSY series tubular screw auger conveyor is the core powder conveying equipment for concrete batching plants, widely used to transport cement, fly ash, and mineral powder from bolted cement silos to batching machines and mixing hosts. With sealed structure, flexible installation, and stable conveying performance, it has become standard supporting equipment for HZS stationary concrete batching plants and YHZS mobile concrete mixing plants.
However, material blockage is the most frequent and troublesome failure during daily operation. Once clogging occurs, it will cause motor overload, material backflow, unstable batching accuracy, and even forced production shutdown, seriously affecting the overall working efficiency of the concrete production line.
Most blockage faults are caused by irregular operation, poor material condition, and neglected daily maintenance rather than equipment quality problems.
This article summarizes professional and practical anti-blocking operation tips for LSY cement screw conveyors, helping global users effectively reduce clogging risks, cut maintenance costs, and maintain long-term stable equipment operation.
Before mastering prevention skills, it is essential to clarify the core causes of blockage in actual working conditions:
Non-standard operation is the primary cause of repeated blockages. Follow the unified industry operating standard: Start the screw conveyor first, then open the feeding valve; stop feeding first, and shut down the conveyor after all materials are completely conveyed.
This no-load start and empty-stop mode completely avoids material stacking at the pipe inlet and bottom, fundamentally eliminating most startup blockage failures. For intermittent production, prohibit long-term material retention inside the conveyor pipe.
LSY screw conveyors are designed for dry powdery materials. Wet and sticky cement powder will adhere to blades and form hard deposits over time. Users must strictly control raw material moisture, store cement and fly ash in sealed and moisture-proof environments, and screen caked materials before feeding.
For rainy and humid areas, regular inspection of cement silo dust removal and moisture-proof devices is required to prevent damp powder from entering the conveying system and causing adhesion blockage.
Overfeeding is a common cause of instantaneous blockage. It is forbidden to open the feeding valve to the maximum limit at one time. Adopt uniform and gradual feeding to match the conveying speed of the spiral blade.
For LSY series conveyors equipped with PLC variable frequency motors, adjust the operating speed according to actual material volume: low speed for stable conveying during large-volume continuous production, and appropriately increase speed to clean residual materials after production ends, effectively preventing material accumulation and bonding.
The applicable working inclination of LSY cement screw conveyors ranges from 0° to 45°. The larger the inclination angle, the lower the conveying efficiency and the higher the blockage risk. In actual project layout, try to adopt horizontal or low-inclination installation.
For projects requiring large-angle lifting, appropriately reduce single-time feeding volume and increase equipment power reserve to avoid material backflow and retention caused by excessive conveying resistance.
Long-term residual powder inside the pipe will harden and thicken, reducing the inner diameter and eventually causing blockage. Form a daily maintenance habit: clean residual materials inside the conveyor after daily shutdown.
Regularly check the wear degree of spiral blades and hanging bearings. Severely worn blades will weaken the pushing capacity and cause material accumulation, which needs timely replacement and maintenance. Meanwhile, check the discharge outlet to ensure smooth discharging without blockage.
For high-frequency use and high-humidity working scenarios, install customized anti-blocking configurations: material level alarm sensors and anti-arch vibration devices for cement silos. Once material accumulation or blockage is detected, the system will send an early warning to remind operators to troubleshoot in time, avoiding equipment overload damage.
If blockage occurs during operation, follow safe and standardized disposal steps: first cut off the power supply completely, prohibit forced startup; open the access door to manually clean blocked materials; check whether blades and bearings are damaged; restart operation after confirming no foreign matter and smooth transmission.
Do not operate the machine with overload for a long time, so as to prevent motor burnout, reducer damage and pipeline deformation caused by severe blockage.
Blockage failure of LSY cement screw auger conveyor is preventable and controllable. Standardized operating procedures, strict material quality control, reasonable parameter matching, and regular daily maintenance can greatly reduce blockage probability, ensure continuous and efficient powder conveying, and guarantee the precise batching and stable operation of the entire concrete batching plant.
Zeyu’s LSY series screw conveyors adopt optimized anti-blocking blade structure, fully sealed dust-proof design, and intelligent PLC speed regulation system. Matched with complete cement silo supporting equipment, they provide global customers with high-efficiency, low-failure, and low-maintenance powder conveying solutions for construction and precast concrete projects.