High-pressure pollution discharge pneumatic valve

Abstract

The invention discloses a high-pressure pollution discharge pneumatic valve. The high-pressure pollution discharge pneumatic valve comprises a valve element, a valve seat and a valve body. The valve element is of a diaphragm type structure penetrating a rubber diaphragm to be connected with the rubber diaphragm through a locknut. The valve element is provided with a Y-shaped sealing ring, and the frictional resistance of the sealing ring during motion of the valve element can be effectively controlled while sealing between the valve element and the valve body is achieved. A valve seat sealing part matched with the sealing face of the lower end of the valve element to form sealing fit is arranged on the valve seat. The outer edge of the sealing face of the lower end of the valve element is arranged as a valve element spherical surface. The valve seat sealing part is matched with the valve element spherical surface through a valve seat inclined guiding surface to form primary sealing in the tangential direction of the spherical surface. The middle of the sealing face of the lower end of the valve element is provided with a plastic valve element filling block, and the valve seat sealing part is matched with the valve element filling block through a valve seat protruding block to form secondary sealing in the stroke direction of the valve element. The sealing performance of the pneumatic valve can be remarkably improved, and the problem that the pneumatic valve is not smoothly opened is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of blowdown valves, in particular to a high-pressure blowdown pneumatic valve. Background technique [0002] The high-pressure blowdown pneumatic valve is used in the blowdown system of the high-pressure compressor, and the discharge of the high-pressure gas-water-oil mixture is controlled by the discharge of the low-pressure control gas applied to the pneumatic valve. In the prior art, such as figure 1 As shown, the lower end of the pneumatic valve is connected to high-pressure exhaust gas, and the upper end is connected to low-pressure control air. Both air pressures can act on the valve core. The valve core and the middle partition of the valve body are also sealed by an O-ring; when no sewage is required, the upper end of the pneumatic valve is fed with low-pressure control air, which makes the upper end of the valve core receive greater pressure, and the valve core moves downward. When moving, the con...

AI Technical Summary

Problems solved by technology

[0003] Although the pneumatic valve is used in the high-pressure compressor blowdown system, it is more reliable and less costly than the direct use of high-pressure solenoid valve blowdown, but in the actual application process, it often occurs when the blowdown is not needed, and the valve core cannot be completely Sealing, there is leakage, which directly reduces the exhaust pressure and final volume flow of all levels; and there is also the problem that the valve core cannot be opened according to the design or the degree of opening is not enough when the sewage needs to be discharged, resulting in the problem of poor sewage discharge

[0004] Therefore, those skilled in the art urgently need to provide a high-pressure blowdown pneumatic valve that can significantly improve the sealing performance and effectively solve the problem of poor opening of the pneumatic valve.

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