Noise reduction device for piston valve and application thereof

Abstract

The invention belongs to noise reduction devices, and particularly relates to a noise reduction device for a piston valve and an application thereof. The noise reduction device for the piston valve comprises a shell and a piston barrel, wherein the shell is provided with an outlet and an inlet; and the piston barrel is fixed into the shell in the axial direction and the rear end of the piston barrel is conical. An air distributing piston is in motive seal pilot fit with the piston barrel and is further driven by a connecting rod drive mechanism. First open holes which are spaced in the radialdirection and further extend in the axial direction are formed in the front side wall of the air distributing piston, and the outer side of the air distributing piston and the outlet inner wall of theshell are in motive seal fit to control the air circuit on-off state and flow passing amount of the inside and outside of the shell. A reducing part with the pipe diameter being reduced is arranged on the inner wall of the air distributing piston in the radial direction and located in front of the first open holes. An opening of a front end cover of the air distributing piston comprises a centraloutlet consisting of second open holes which are distributed in the center of the front end cover at intervals, and an outer side outlet consisting of third open holes which are spaced in the radialdirection and further distributed in the outer side of the central outlet. By means of the noise reduction device for the piston valve and the application thereof, the technical problem that noise ofan existing product is large in the application process is effectively solved, and the advantages that the noise produced in the using process is effectively reduced and economical efficiency is goodare achieved.

Description

technical field [0001] The invention belongs to a noise reduction device, in particular to a noise reduction device of a piston valve and its application. Background technique [0002] The piston valve is different from the butterfly valve and gate valve which are only used for pipeline cutoff. The piston valve can meet various special adjustment requirements and also has a reliable cutoff control function. Its adjustment function is realized by a piston-like cylinder making axial movement in the valve cavity. The medium enters the housing in an arc shape along the axial direction, and the flow channel in the piston valve is axisymmetric, so that no turbulence occurs when the fluid flows. The change of the flow channel area is realized by a linear movement of a piston along the axis of the pipe. No matter where the piston is, the fluid section in the valve cavity is annular, and shrinks toward the axis at the outlet. The piston valve has high flow capacity, and the openin...

AI Technical Summary

Problems solved by technology

The above-mentioned prior art has obtained obvious technical progress in noise reduction due to the adoption of the piston valve instead of the existing butterfly valve, but the above-mentioned prior art has the following problems in practical application: one is that the structure of some parts in the valve body is not It is reasonable to cause mechanical noise caused by structural vibration during work; the second is the aerodynamic noise caused by the unreasonable structure of the valve cavity used for air pressure drop dispersion

[0006] As far as the applicant understands, there is currently no national standard or industry standard in China that regulates the performance indicators of piston valves.

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