Low-noise single-seat cage type regulating valve

Abstract

The invention discloses a low-noise single-seat cage type regulating valve. The low-noise single-seat cage type regulating valve comprises a valve body, a valve seat, a valve cage, a supporting cylinder, a sealing ring, a sealing gasket, a valve rod, a valve deck, a sealing washer, a flat gasket, a set screw, a valve element and a valve seat sealing gasket. A window is arranged on the valve cage and can allow fluid to circulate and allow the flow to be accurately controlled, and two guide rings and an elastic sealing washer are further arranged in an annular groove in the lower side of the inner wall of the supporting cylinder, so that sealing is achieved. The two guide rings are located on the two sides of the elastic sealing washer. The inner cylindrical surface of each guide ring makes contact with the outer cylindrical surface of the valve element. Both the radial width of each guide ring and the radial width of the elastic sealing washer are slightly larger than the radial depth of the annular groove in the lower side of the inner wall of the supporting cylinder, so that the inner surface of the valve cage is made to be in clearance fit with the outer cylindrical surface of the valve element, and in this way, abrasion of the surface of the valve element is reduced while both the guiding function and the sealing function are achieved. The low-noise single-seat cage type regulating valve has the advantages of being compact in structure, reliable in sealing performance, low in noise, high in regulating precision and the like.

Description

[0001] Technology [0002] The invention relates to the technical field of the valve industry, in particular to a low-noise single-seat cage-type regulating valve. Background technique [0003] The regulating valve is an important part of the industrial automation control system, which is mainly used to adjust the process parameters such as the flow and pressure of the medium. According to the control signal of the automation system, the opening of the valve is automatically adjusted, and the solid line accurately controls the flow and pressure of the medium in the pipeline. For the working conditions of large flow and high pressure difference, a cage is usually installed in the internal flow channel of the valve body. The cage is installed coaxially with the opening and closing parts such as the valve stem and the valve core. The cage with noise reduction function can effectively attenuate the medium. flow noise. The common cages with noise reduction function mostly adopt l...

AI Technical Summary

Problems solved by technology

This kind of labyrinth multi-stage noise reduction valve cage needs to have the functions of flow regulation and noise reduction at the same time, which has the disadvantages of difficult processing and assembly, high energy loss, and poor flow control accuracy.

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