Multi-stage pressure-reducing erosion-resisting regulating valve

Abstract

The invention relates to a water dispenser, and discloses a multi-stage pressure-reducing erosion-resisting regulating valve. The multi-stage pressure-reducing erosion-resisting regulating valve comprises a valve body, and a valve base is arranged in the valve body; the valve base is provided with a valve element; the valve base is provided with a valve rod surrounded by the valve element, and the a third-stage pressure-reducing plate surrounding the valve element and the valve rod is arranged on the valve base; a second-stage pressure-reducing plate is surrounded by the third-stage pressure-reducing plate, and the valve body is connected with an upper valve cover; the valve rod penetrates the upper valve cover, and a lower valve cover is connected under the valve body; one side of the valve body is connected with an inlet valve body, and a medium inlet is formed in the inlet valve body; the lower valve cover is connected with an outlet valve body, and a medium outlet is formed in the outlet valve body; a first-stage pressure-reducing plate is arranged on the track where a medium flows towards the third-stage pressure-reducing plate from the medium inlet, and a first horn mouth is formed in one side, close to the medium inlet, of the first-stage pressure-reducing plate; and the small round end of the horn mouth faces towards the third-stage pressure-reducing plate. Aiming at solving the erosive problem of the valve base and the valve element of an existing regulating valve from a medium, the multi-stage pressure-reducing erosion-resisting regulating valve capable of achieving three-stage pressure reduction is provided.

Description

technical field [0001] The invention relates to a water dispenser, in particular to a multi-stage pressure-reducing and erosion-resistant regulating valve. Background technique [0002] Angular high-pressure regulating valve is a product developed for the severe problems of short service life, easy fracture of valve stem and easy falling off of bushing under the severe working conditions of high pressure or high pressure difference, severe cavitation and erosion. It adopts throttling mode to share the pressure difference, which reduces cavitation, erosion and torsion damage, and greatly improves the service life of the control valve. The valve body is right-angled, and the valve core is a single-guided structure. The flow path of the valve body is simple and the resistance is small. It is especially suitable for the regulation of high-viscosity, suspended solids and granular media fluids, which can avoid coking, sticking and clogging. However, the existing angle regulating ...

AI Technical Summary

Problems solved by technology

However, the existing angle control valves often cause cavitation and noise due to excessive fluid pressure and poor depressurization effect.

[0003] The Chinese patent number is CN201420666027.X, which discloses an angle-shaped high-pressure erosion-resistant regulating valve, including a driving mechanism, a valve core rod, a valve body, a valve seat and a lower valve cover, wherein the upper part of the valve seat is a cylinder shape, and there are multiple circles of first-stage pressure-reducing holes in the circumferential direction of the cylindrical part. The bottom of the valve seat is provided with a liquid outlet that communicates with the medium outflow channel. The opening and closing section extending into the liquid outlet of the valve seat. The opening and closing section is in the shape of a cone with a large upper part and a smaller lower part. A sleeve and an orifice plate are added. The sleeve is also cylindrical with open ends. The outer diameter of the sleeve is smaller than the inner diameter of the upper part of the valve seat, and the inner sleeve of the sleeve is placed on the upper part of the valve seat. There are multiple rings of secondary pressure-reducing holes on the circumference of the sleeve wall. The orifice plate is located between the valve seat and the lower valve cover. There are multiple three-stage pressure-reducing holes on the board connecting the liquid outlet and the medium outflow channel; the angle-shaped high-pressure erosion-resistant regulating valve with this structure can only depressurize the medium entering the valve seat and valve core twice, The protection effect is average, and the service life of the valve seat and valve core is average

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