Axial multi-stage decompression sleeve and multi-stage decompression valve containing the sleeve

Abstract

The invention relates to an axial multi-stage decompression sleeve and a multi-stage decompression valve containing the sleeve. The sleeve includes multi-layer discs arranged at intervals along the axial direction. Through holes; the through holes on the adjacent disks are distributed radially and alternately, and the total area of ​​the through holes on each disk increases successively; the pressure relief valve includes a hollow valve body, a sleeve is installed on the bottom surface of the valve body, and the valve core hole in the middle of the sleeve The spool is installed inside, and the spool moves along the axial direction of the sleeve driven by the valve stem, so that the bottom of the spool is flush with one of the discs on the sleeve; the fluid enters from the inlet and passes through the passage on each disc. The hole and the interlayer flow channel between the holes flow into the valve body after circuitous flow and flow out from the outlet. During the circuitous flow, friction occurs between the fluid and the disk, thereby consuming energy, causing pressure loss, and realizing pressure reduction. The pressure regulating valve of the present invention has an ingenious structure and small size, and can adjust the decompression coefficient through the position of the valve core, has high precision, long service life and low noise.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an axial multi-stage decompression sleeve and a multi-stage decompression valve containing the sleeve. Background technique [0002] Regulating valves are often used to regulate the flow of media in pipelines. [0003] The flow path of the regulating valve generally adopts a high-inlet and low-outlet structure. The lower end of the valve core is made with a sealing surface that cooperates with the valve seat. The position of the valve core is controlled by the transmission mechanism, thereby controlling the flow of the medium through the valve to achieve flow regulation. The main problem of this structure is that when the pressure difference between the front and back of the valve is large, the flow rate of the medium in the valve is very high under the condition of small opening, and the medium has a strong scouring effect on the sealing surface of the valve core. Cavitation is ...

AI Technical Summary

Problems solved by technology

In the prior art, the structure of the multi-stage decompression valve sleeve is that several coaxial sleeves are arranged outside the valve core, and multiple holes are arranged on a single sleeve, and multi-layer sleeves are superimposed to perform multi-stage decompression; this technology The disadvantages are: the sleeve is a radial stacking structure. When the pressure difference of the valve is very large, it is necessary to stack multiple sleeves, which will increase the volume of the valve cavity and make the valve too heavy; in the case of a limited number of sleeves, In order to enhance the pressure-reducing capability of each stage of the sleeve, the diameter of the flow hole is usually set relatively small, which greatly increases the risk of valve blockage

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