Anti-blocking dredging assembly using negative pressure effect for flow control valve

Abstract

The invention relates to the technical field of flow control valves, and discloses an anti-blocking dredging assembly using a negative pressure effect for a flow control valve. The anti-blocking dredging assembly comprises a valve body, the bottom of the valve body is fixedly connected with a precipitation bin, one side of the precipitation bin is fixedly connected with a connecting pipe, and theinterior of the precipitation bin is movably connected with a collecting box. A sliding plate is connected to the inner side wall of the collecting box in a sliding manner, and a first reset spring and a lower pressing disc are fixedly connected to the bottom of the sliding plate. A supporting sliding rod moves downwards under the action of the gravity of the collecting box, so that the collectingbox and a connecting hopper on the collecting box move downwards, the connecting hopper slides to a connecting pipe, the connecting hopper and the connecting pipe are in a communicating state, impurities in the collecting box enter a negative pressure pipe through the connecting hopper and the connecting pipe, and the purpose of automatic discharging is achieved; and the device can automaticallyachieve the purpose of discharging impurities according to the weight of the impurities, and therefore the problem that due to too many impurities, pressure adjustment in the valve is affected is solved.

Description

technical field [0001] The invention relates to the technical field of flow control valves, in particular to an anti-blocking and dredging assembly for flow control valves using negative pressure effects. Background technique [0002] The flow control valve is a multi-functional valve that uses high-precision pilot mode to control the flow. It is suitable for pipelines that need to control the flow and pressure of the water distribution pipe, keep the predetermined flow constant, limit the excessive flow to a predetermined value, and appropriately reduce the upstream high pressure, even if the pressure upstream of the main valve changes, it will not affect The flow rate downstream of the main valve, at present, due to the working method of the flow control valve, when the pressure is adjusted, the flow rate of the flow in the valve is relatively low, so it is very easy to block. [0003] In the prior art, in order to avoid blockage in the valve, a filter screen and a sedime...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an anti-blocking and dredging assembly for flow control valves, which has the advantage of automatically dredging and discharging impurities according to the weight of impurities and using negative pressure, and solves the problem of existing problems. Some valve bodies cannot automatically dredge and discharge the impurities according to the weight of the precipitated impurities, so that the impurities are easy to accumulate in the sedimentation tank. When more impurities are accumulated in the tank, it will affect the overall pressure in the valve, which will cause the control valve to fail. Accurately adjust the pressure, thus affecting the flow control accuracy

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