Adjustable compression release valve

Abstract

The invention provides an adjustable pressure reducing valve, belonging to the valve technical field, which solves the problems of small adjustable range of the pressure reducing valve, lower sensitivity in the traditional pressure reducing valve, which includes a valve body with an inlet chamber and an outlet chamber and a valve handle arranged in the valve body, wherein a middle chamber is arranged in the valve body between the inlet chamber and the outlet chamber, and the inlet chamber communicates with the outlet chamber through the middle chamber. A sealing surface and a valve core sealed with the sealing surface are arranged in the middle chamber. The valve handle is movably arranged in the inlet chamber, one end of which passes through the inlet chamber and is fixed with the valve core. A lower piston is arranged in the outlet chamber, the other end of valve handle passes through the inlet chamber backwards and is fixed with the lower piston. A spring is arranged at the lower part of the lower piston, and one end of the spring abuts against the lower piston, and the other end abuts against the adjusting mechanism which can adjust the blenometer. The adjustable pressure reducing valve has the characteristics of simple structure, high sensitivity and wide application range.

Description

technical field [0001] The invention belongs to the technical field of valves, and relates to a pressure reducing valve, in particular to an adjustable pressure reducing valve. Background technique [0002] On the pipelines that transport liquids, especially the water pipelines of high-rise buildings, in order to control and balance the pressure of the liquid in the pipelines, it is usually necessary to install a pressure reducing valve. [0003] Existing decompression valve such as Chinese patent application number is that 200420045101.2 provides a kind of " simple decompression valve ", comprises bonnet and valve body, is provided with spool in the valve body, and the middle part of valve body is provided with the big and small circles that connect up and down. Hole, the lower part of the spool is provided with a spring. An annular boss is arranged on the edge of the large round hole; an annular groove is arranged in the middle of the small round hole, and an annular rubb...

AI Technical Summary

Problems solved by technology

[0004] Although this simple pressure reducing valve can automatically adjust the outlet pressure according to the inlet pressure change, but because the spring force cannot be adjusted, the range of automatic adjustment is small.

Due to the unreasonable structural design of the spool, it cannot move up and down well when the water pressure changes, and the sensitivity is low

Other adjustable pressure reducing valves also do not have a structure for adjusting the spring, and there are also the above-mentioned problems.

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