Constant pressure full-closed reducing valve

Abstract

The invention provides a constant pressure full-closed reducing valve comprising a valve shell. One side of the valve shell is of a medium inlet, the opposite side of which is of a medium outlet. An adjusting spring is arranged at top of the inner valve shell, a valve disk is arranged at the lower end of the adjusting spring, the periphery of the valve disk is sealed with the inner wall of the valve shell through a diaphragm, a main valve spring is arranged at bottom of the valve shell, a valve seat is arranged above the main valve spring, a partition is arranged above the medium inlet, an auxiliary valve disk is connected above the partition, feedback holes are formed in the portions of the shell above and below the auxiliary valve disk, a power cavity is formed above the auxiliary valve disk, a valve seat connecting plate is arranged between the medium inlet and the medium outlet, the valve seat is connected below the valve seat connecting plate, and the valve seat connecting plate divides the space between the partition and the valve seat into two equal spaces as a first room and a second room. Under decompressing effects of the valve seat connecting plate and the valve seat, medium pressure Pj enters the second room after the medium enters the valve shell, so that consistent pressure above and below the auxiliary valve disk is realized through the feedback holes; the adjusting spring and the valve disk perform indifference adjustment to the medium, and the adjusting effect is stable.

Description

technical field [0001] The invention relates to a constant-pressure fully-enclosed decompression valve, which is a constant-pressure load, injection-type, fully-enclosed, auxiliary valve-type decompression valve, which belongs to the field of valves. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, ...

AI Technical Summary

Problems solved by technology

[0004] There are many types of pressure reducing valves, which have basically the same functions, but have different defects. Traditional pressure reducing valves are rarely suitable for both steam medium and liquid medium.

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