Device for preventing foreign matters from entering pipeline

By combining a pneumatic baffle and a pneumatic telescopic rod with a PLC controller, a pipeline anti-foreign object entry device is used to solve the problems of fire and explosion risks and poor suction effect caused by lint entering the pipeline during polyester fiber production, thus achieving safe and reliable automated cleaning and protection.

CN224100263UActive Publication Date: 2026-04-10JIANGSU HENGLI CHEM FIBER
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Patent Information

Application Number
CN202520739750.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-18
Publication Date
2026-04-10
Estimated Expiration
2035-04-18

AI Technical Summary

Technical Problem

In the current polyester fiber production process, lint in the heating box can easily enter the pipeline and accumulate during abnormal shutdowns, leading to the risk of fire and explosion. Furthermore, lint easily adheres to the filter screen, affecting the suction effect and posing safety hazards and quality problems.

Method used

The system employs a combination of pneumatic baffles and pneumatic telescopic rods with a PLC controller. By detecting filament breakage through a filament breakage sensor, it controls the pneumatic baffles to isolate the heat box from the branch flue. High-pressure airflow is used to remove lint, and the lint detection device and cleaning roller brush clean the lint capture holes, thus achieving automated prevention of foreign object entry and cleaning.

Benefits of technology

It effectively prevents lint from entering the suction system, ensuring system safety and reliability, removes lint from the pipes, avoids the risk of combustion and explosion, and improves suction effect and production stability.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a device for preventing foreign matters from entering a pipeline, the pipeline comprises a branch smoke pipe and a main smoke pipe which are sequentially connected, one end of the branch smoke pipe far away from the main smoke pipe is connected with the inside of a hot box, and the main smoke pipe is connected with a fan; the device for preventing the foreign matter from entering the pipeline comprises a broken wire sensing device, a pneumatic partition plate, a pneumatic telescopic rod and a PLC. The pneumatic partition plate is fixedly connected with the telescopic end of the pneumatic telescopic rod. When the pneumatic telescopic rod is in the maximum range, the pneumatic partition plate separates the interior of the branch smoke pipe from the interior of the hot box. The broken filament sensing device is used for detecting whether tows are broken; the pneumatic telescopic rod and the broken wire sensing device are electrically connected with the PLC. When the broken filament sensing device detects that the filament bundle is broken, the broken filament sensing device transmits a signal to the PLC, and the PLC controls the pneumatic telescopic rod to extend. The device prevents batting generated by abnormal broken yarn from entering a suction system, so that the suction system is safe and reliable.
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