Anti-blockage cutoff non-return regulating valve

Abstract

The invention discloses an anti-blockage cutoff non-return regulating valve, which comprises a valve body, a valve core, a valve stem, a valve seat and a valve stem operating mechanism, wherein two flow passages which are different in height are arranged in the valve body; a liquid inlet flow passage is arranged at a low position, a liquid outlet flow passage is arranged at a high position, and the liquid inlet flow passage is communicated with the liquid outlet flow passage by a middle flow passage; the valve seat is arranged at the middle passage; the valve core is concentric with the valve seat and forms a sealing pair with the valve seat; and a filter is arranged on the upper edge of the liquid inlet flow passage along the liquid inlet direction. The invention has the advantage that when the anti-blockage cutoff non-return regulating valve is used, the filtering of impurities in a fluid medium, the regulation of fluid flow and the emergent non-return and cutoff function can be realized, so that the valve is prevented from being blocked, can perform effective and high-accuracy regulation for a long term and used safely, and is in long service life.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to an anti-blocking and anti-blocking control valve capable of anti-blocking and anti-blocking, long-term effective high-precision adjustment and emergency non-return cut-off function in a fluid medium with relatively harsh conditions. Background technique [0002] Due to engineering construction, welding slag and other sundries enter the valve cavity, or the sundries of vulnerable parts of other equipment in front of the valve often cause the regulating valve to get stuck, blocked, etc., unable to work normally, and even affect other valves in the pipeline system. The normal operation of the equipment has caused great safety hazards. Although the existing technology has taken certain measures in some aspects, there is still no effective method to completely solve the problem of jamming and blocking, and it does not have the functions of automatic non-return and emergency...

AI Technical Summary

Problems solved by technology

[0002] Due to engineering construction, welding slag and other sundries enter the valve cavity, or the sundries of vulnerable parts of other equipment in front of the valve often cause the regulating valve to get stuck, blocked, etc., unable to work normally, and even affect other valves in the pipeline system. The normal operation of the equipment has caused a great safety hazard

Although the existing technology has taken certain measures in some aspects, there is still no effective method to completely solve the problem of jamming and blocking, and it does not have the functions of automatic non-return and emergency cut-off. The use effect is not good, and long-term high-precision adjustment cannot be performed. And long life, safe use

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