Self-cleaning multistage depressurization adjusting valve

Abstract

The invention relates to a self-cleaning multistage depressurization adjusting valve comprising an internally hollow valve body. A sleeve is installed on the inner bottom face of the valve body. An interlayer is arranged in the part, outside the outer circumferential face of the sleeve, of the valve body. A dirt discharge cavity is formed between the interlayer and the inner wall face of the valvebody. The interlayer is provided with a dirt discharge groove. A valve element is installed in the middle of the sleeve. The sleeve comprises a plurality of layers of discs stacked at intervals. Eachsingle disc is provided with a plurality of through holes for flowing of fluid. The fluid flows through the through holes in all the discs and an interlayer runner to generate friction, and layer-by-layer depressurization is achieved. A valve rod drives the valve element to move, thus the valve element is aligned with different discs, and the depressurization coefficient is adjusted. When movingupwards, the valve element drives the sleeve to move finally, thus gaps between the discs are aligned with the dirt discharge groove, thus the fluid flows to the dirt discharge cavity through the interlayer runner and the dirt discharge groove, and self cleaning is achieved. Through the self-cleaning multistage depressurization adjusting valve, self-cleaning of the adjusting valve is achieved while multistage depressurization is achieved, service life is prolonged greatly, and usability is improved greatly.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a self-cleaning multi-stage decompression regulating valve. Background technique [0002] Regulating valves are commonly used in pipelines to regulate the flow of fluid in the pipeline. For applications where there is a large difference in fluid pressure before and after adjustment, a multi-stage pressure relief valve is usually used to gradually reduce the pressure of the fluid by using the multi-stage structure of the sleeve in the pressure relief valve. [0003] In the prior art, the sleeve of the multi-stage pressure-reducing valve mainly has two structural forms, one is a structure in which several coaxial sleeves are arranged outside the valve core, and a plurality of holes are arranged on each sleeve, stacking multiple multi-level sleeve for multi-stage decompression; the other is a labyrinth disc stacked structure, which processes multi-stage radial 90-degree bending chan...

AI Technical Summary

Problems solved by technology

These two existing multi-stage pressure-relief valves, because the size of a single flow hole or flow channel on the sleeve is small, and the flow is circuitous and bends many times during the flow process, there is a large gap in the flow hole or flow channel. Risk of blockage, and once blockage occurs, it cannot be cleared automatically, which will seriously reduce the performance of the valve and even cause the valve to fail

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