Shutdown-free cleaning system of vacuum pipeline

Abstract

The invention relates to a shutdown-free cleaning system of a vacuum pipeline. The shutdown-free cleaning system of the vacuum pipeline comprises a vacuum pump and a vacuum pipe arranged at a gas intake end of the vacuum pump. The front end of the vacuum pipe is respectively communicated with a first gas intake pipe and a second gas intake pipe. A first vacuum detector is arranged in an entrance end of the first gas intake pipe. First electromagnetic valves are arranged at the two ends of the first gas intake pipe respectively. A first heater is arranged in the middle of the first intake pipe in a sleeved mode. An output end of the first vacuum detector is connected with a processor. The output end of the processor is respectively and electrically connected with the first heater and the two electromagnetic valves to form a first gas intake pipe working circuit. The second gas intake pipe and the first gas intake pipe are installed with a second vacuum detector, a second electromagnetic valve and a second heater to form a second gas intake pipe working circuit. The vacuum detector can detect the vacuum degree of a pipeline in a real time mode, a signal of the vacuum detector serves as a triggering signal of working of the pipeline heaters and the electromagnetic valves, the amount of fouling attached to the wall of the pipeline is reduced and the pipeline can be cleaned without shutting down the vacuum pump.

Description

technical field [0001] The invention relates to a vacuum pipeline, which is especially suitable for a vacuum pipeline-free shutdown cleaning system of a barrel of a BOPET twin-screw extruder. [0002] Background technique [0003] Biaxially oriented polyester film is a new type of multi-purpose film developed in recent years. Polyester film (BOPET) has high mechanical strength, good rigidity, strong toughness, excellent electrical insulation performance, transparency, high gloss, non-toxic and non-toxic Smell, tasteless, wear-resistant, folding-resistant, pinhole-resistant and tear-resistant. Polyester film (BOPET) is widely used in packaging materials, magnetic recording, photosensitive materials, electronics, electrical insulation, industrial films, decoration and other fields due to its excellent physical and chemical properties. It has recyclability, sustainable modification, etc. Features. [0004] At present, the twin-screw extruder for producing polyester film is e...

AI Technical Summary

Problems solved by technology

However, the existing vacuum system does not have a heating system at the pipeline inlet, and dirt is easy to adhere to the inner wall of the pipeline, causing frequent pipeline blockages. After the pipeline is blocked, it must be shut down for cleaning. The normal cleaning cycle is about once a week, and each shutdown is about 5 hours for cleaning. , which seriously affects the production efficiency and product quality of polyester film, and frequent shutdowns may easily cause mechanical failure

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