High-precision diaphragm type muting pressure reduction valve

Abstract

The invention relates to a high-precision diaphragm type muting pressure reduction valve, and belongs to the technical field of diaphragm type pressure reduction valves. The high-precision diaphragm type muting pressure reduction valve comprises a valve body, a valve cover, a diaphragm, a valve element, a valve element sleeve and pressure regulating springs. The diaphragm is arranged in a diaphragm cavity of the valve body; the upper surface of the diaphragm is compressed and fixed by the lower end face of the valve cover, and the lower surface of the diaphragm is compressed on a step surface of the diaphragm cavity; the pressure regulating springs are mounted in the valve cover, and the lower ends of the pressure regulating springs are pressed on the upper surface of the diaphragm in an abutting manner; the valve element sleeve is fixedly arranged in the valve element cavity of the valve body, and the valve element is arranged in the valve element sleeve in a matched manner; the upper end of the valve element is connected with the diaphragm, and a distortion-prevention gasket is arranged between the upper surface of the diaphragm and the lower end face of the valve cover in a matched manner; each of the upper surface of the distortion-prevention gasket, the lower surface of the distortion-prevention gasket and the lower end face of the valve cover is provided with an inclined plane which inclines inwards; and meanwhile, a ring of first boss is arranged on the lower surface of the distortion-prevention gasket. The high-precision diaphragm type muting pressure reduction valve has the advantages of being high in pressure regulating precision, wide in pressure regulating range, low in noise and long in service life, being provided with an overpressure protection device on an outlet and the like.

Description

technical field [0001] The invention relates to a high-precision diaphragm type silent pressure reducing valve, which belongs to the technical field of diaphragm type pressure reducing valves. Background technique [0002] The existing diaphragm pressure reducing valve consists of a diaphragm, a spring, a valve core and a valve core sleeve to form a pressure balance assembly. The spring applies downward force to open the water flow, and the diaphragm acts upward to close the water flow. When the downstream water pressure rises, the valve core is pushed upwards, the water flow channel is reduced, and the downstream pressure is stabilized at the set pressure value. When the downstream water pressure decreases, the pressure of the spring is greater than the water pressure acting on the lower end of the spool, and the spool moves downward to open the water flow channel. The smaller the downstream water pressure, the smaller the water pressure acting on the lower end of the valv...

AI Technical Summary

Problems solved by technology

However, the diaphragm pressure reducing valves currently on the market have defects such as low pressure regulation accuracy, low pressure regulation range, high noise, relatively short service life, and no overpressure protection device at the outlet.

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