Large-flow air-control corrugated pipe type pressure reducing valve

Abstract

The invention discloses a large-flow air-control corrugated pipe type pressure reducing valve. An inlet cavity (2), an outlet cavity (4), a damping cavity (6), a control cavity (7) and an unloading cavity (9) are sequentially arranged in a valve body from top to bottom. The large-flow air-control corrugated pipe type pressure reducing valve is characterized in that the front end of the valve inlet cavity (3) is externally provided with a bypass pipeline (23) communicating with the unloading cavity (9), and the acting force applied by a medium to a throttling valve element (13) is balanced. Compared with the prior art, the large-flow air-control corrugated pipe type pressure reducing valve has the remarkable beneficial effects that a metal corrugated pipe serves as a sensitive element of the pressure reducing valve, rigidity is small, sensitivity is good, the effective area is large and the mass is small, and therefore the kind of valve has the beneficial effects of being high in outlet pressure control precision, stable in pressure, large in flow, small in dynamic-static pressure difference, good in dynamic characteristic and the like; and the unloading cavity can be used for counteracting the acting force applied by the high-pressure gas medium to the throttling valve element, the opening conditions of the throttling valve element are improved, the loads of the sensitive element are reduced, and the service life of the metal corrugated pipe is prolonged.

Description

technical field [0001] The invention relates to the field of gas pressure reducing valves, in particular to a large-flow air-controlled bellows type pressure reducing valve. Background technique [0002] The gas pressure reducing valve reduces the inlet pressure to the outlet pressure required by the system through adjustment, and uses the energy of the elastic element of the valve itself and the fluid medium itself, so that the outlet pressure of the valve does not change with the inlet pressure and flow rate, and automatically maintains a certain value. Valves with relatively stable values. From the perspective of fluid mechanics, the pressure reducing valve changes the flow velocity and kinetic energy of the medium particle by changing the throttle area of ​​the valve seat, resulting in different pressure drops, so as to achieve and maintain different pressures on the outlet side. Gas pressure reducing valves are widely used in the gas pipeline system to decompress the h...

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Problems solved by technology

[0004] The patent of this invention solves the problem of small flow of conventional gas pressure reducing valves, and provides a new type of large flow air-controlled bellows type pressure reducing valve

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