Low-temperature electric adjusting valve capable of adjusting pretightening force and adjusting method

Abstract

The invention provides a low-temperature electric adjusting valve capable of adjusting pretightening force and an adjusting method. The low-temperature electric adjusting valve capable of adjusting the pretightening force comprises a valve body structure, a pretightening force adjusting structure and a driving mechanism; the valve body structure comprises a valve body, a valve base, a liquid inlet, a liquid outlet, a valve rod and a valve element; and the pretightening force adjusting structure comprises an elastic piece mounting base, an elastic piece, a push rod pressing block, a push rod, acover shell and a baffle plate. The low-temperature electric adjusting valve capable of adjusting the pretightening force has the following advantages: (1) in the valve closing process, the magnitudeof sealing force between the valve element and the valve base can be simply, quickly and accurately detected, so that the sealing force between the valve element and the valve base is controlled in aneeded range; the unadjustability of the pretightening force of the adjusting valve is changed to adjustability, so that the pretightening force for tight bonding of sealing surfaces of the valve base and the valve element is adjusted more reasonably, and excessive pretightening force and insufficient pretightening force are prevented; and under the precondition of meeting leakage requirements, the wear of the valve element is effectively reduced, and the service life of the valve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a low-temperature electric control valve with adjustable pretightening force and an adjustment method. Background technique [0002] At present, there are many kinds of regulating valves and many patents, but the existing various regulating valves mainly have the following problems: when the regulating valve is closed, the sealing force between the valve seat and the sealing surface of the valve core cannot be detected, therefore, Often there is a problem that the sealing force is too large or too small. If the sealing force is too small, leakage will easily occur; if the sealing force is too large, it will effectively increase the wear of the valve core and reduce the service life of the valve. Therefore, how to simply and effectively control the sealing force between the valve core and the valve seat, effectively reduce the wear of the valve core and improve the serv...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many kinds of regulating valves and many patents, but the existing various regulating valves mainly have the following problems: when the regulating valve is closed, the sealing force between the valve seat and the sealing surface of the valve core cannot be detected, therefore, Often there is a problem that the sealing force is too large or too small. If the sealing force is too small, leakage will easily occur; if the sealing force is too large, it will effectively increase the wear of the valve core and reduce the service life of the valve.

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