Device for preventing leakage of plate heat exchanger of cold continuous rolling emulsion system, and method

Abstract

The invention discloses a device for preventing leakage of a plate heat exchanger of a cold continuous rolling emulsion system, and a method. The device comprises a plate heat exchanger HRQ, wherein a liquid pressure measurement sensor Y is installed at the position of an emulsion inlet pipeline G1 of the plate heat exchanger HRQ; and a pneumatic flow control valve QDF is installed at the position of a bypass pipeline G2 connected with the plate heat exchanger HRQ in parallel. According to the device for preventing leakage of the plate heat exchanger of the cold continuous rolling emulsion system, and the method provided by the invention, by adjusting the flow of emulsion entering the plate heat exchanger HRQ, a sealing gasket is prevented from bearing instant high-pressure impact and losing efficacy, and the problems that in the prior art, the sealing gasket of the plate heat exchanger HRQ shifts, deforms and is damaged, the service life is shortened, and then failure, liquid channeling and abnormal leakage accidents are caused are solved.

Description

technical field [0001] The invention relates to the technical field of cold-rolled sheet rolling, in particular to a device and method for preventing leakage of a plate heat exchanger in an emulsion system of cold continuous rolling. Background technique [0002] In the cold tandem rolling mill, the emulsion plays the role of lubrication, cooling and cleaning during the rolling process, and is generally used for recycling. Its composition is mainly about 97-99% of water plus about 1-3% of rolling oil ( The main ingredients are mineral oil, oily agent, surfactant and extreme pressure agent, preservative, antioxidant and other additives). The emulsion system must have functions such as circulation, filtration, and temperature control to ensure good lubrication and cooling effects of the system, and to ensure continuous production and stable product quality. [0003] In the prior art, when the emulsion system is in the initial stage from stop state to resume operation, the jet...

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Problems solved by technology

[0005] 1. When leakage occurs, add a pre-tightening spring on the clamping bolt to increase the sealing pre-tightening force to prevent leakage, but it can only be maintained for a short time, and it will cause the deformation of the plate heat exchanger and reduce the service life;

[0006] 2. Take the method of increasing the maintenance of the plate heat exchanger (replacing the plates and gaskets), but it takes a long time to shut down and affect the production efficiency

[0009] The above-mentioned related patents all improve the gasket and plate structure, which also only play a mitigating role and cannot solve the fundamental problem

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