Pneumatic eccentric rotary regulating valve

Abstract

The invention relates to a pneumatic eccentric rotary regulating valve which comprises a pneumatic actuating mechanism and an eccentric rotary valve. The eccentric rotary valve comprises a valve body and a valve stem penetrating through the valve body, wherein a valve core and a valve seat which are mounted on the valve stem are arranged in the valve body; an eccentric distance is designed between the spherical center of the valve core and the rotary center of a valve shaft; and the running track of the eccentric distance is shaped like a cam-shaped curve. Thus, the abrasion of the valve seat is reduced and the service life of the regulating valve is prolonged. As a result, the regulating valve has a self-cleaning function and high sealing performance.

Description

technical field [0001] The invention relates to a device that can be widely used in industrial production such as petroleum, chemical industry, metallurgy, etc. to cut off or regulate the flow of oil liquid, gas, natural gas and other media, and is especially suitable for regulating media with fibers, high viscosity and small particles A pneumatic eccentric rotary valve. Background technique [0002] At present, the regulating valves used to cut off or regulate the flow of media mainly include ball valves and butterfly valves. Although ball valves have small fluid resistance, they are simple in structure, small in size, light in weight, compact and reliable, easy to operate, fast to open and close, and easy to maintain. It has the advantages of wide range, but it has high processing precision, high cost, and is not easy to use in high temperature. If there are impurities in the pipeline, it is easy to be blocked by impurities, which will cause the valve to fail to open. [...

AI Technical Summary

Problems solved by technology

[0002] At present, the regulating valves used to cut off or regulate the flow of media mainly include ball valves and butterfly valves. Although ball valves have small fluid resistance, they are simple in structure, small in size, light in weight, compact and reliable, easy to operate, fast to open and close, and easy to maintain. Wide advantages, but high processing precision, high cost, difficult to use in high temperature, if there are impurities in the pipeline, it is easy to be blocked by impurities, causing the valve to fail to open

[0003] Although the butterfly valve has the advantages of convenient and rapid opening and closing, labor saving, small fluid resistance, frequent operation, simple structure, small size, light weight, and good adjustment performance, it has a small range of operating pressure and operating temperature, poor sealing, and low reliability.

[0004] The pneumatic eccentric rotary regulating valve of the present invention can overcome the shortcomings of the above-mentioned ball valves that there are impurities in the pipeline, which are easily blocked by magazines, the butterfly valve has poor sealing performance, low reliability, and small pressure and working temperature ranges. It is a self-cleaning function. , can protect the sealing surface from damage, a regulating valve with high sealing performance and a wide range of pressure and working temperature

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