Self-cleaning structure for diaphragm throttling valve

Abstract

The invention relates to a self-cleaning structure for a diaphragm throttling valve. The structure involves a diaphragm and a valve seat, wherein the diaphragm and the valve seat are arranged on a valve body of the throttling valve, the diaphragm is arranged on the valve seat, a cavity communicating with a water outlet channel of the valve body is arranged in the valve seat, the upper end face ofthe valve seat is matched with the diaphragm, at least one throttling flow channel is directly or indirectly arranged on the end face, close to the diaphragm, of the valve seat, the inlet ends of thethrottling flow channels communicate with a water inlet channel of the valve body, the outlet ends of the throttling flow channels communicate with the cavity, and when the diaphragm moves downwards,the lower end face of the diaphragm covers the throttling flow channels; and when the diaphragm is moved upwards, the throttling flow channels are opened. By the adoption of the scheme, a self-cleaning mechanism does not need to be arranged outside, the structure is simple, and crystallization and blocking are avoided.

Description

technical field [0001] The invention relates to the technical field of throttle valves, in particular to a self-cleaning structure for diaphragm throttle valves. Background technique [0002] The throttle valve is mainly composed of a valve body and a valve core assembly. There is a throttle hole on the valve body. Due to the small size of the throttle hole, the calcium and magnesium ions in the water will crystallize at the throttle hole and form after long-term use. Causes clogging of the orifice, so dirt or crystals at the orifice need to be dealt with. [0003] The applicant disclosed in the invention patent No. 201410707814.9 a device for automatically cleaning the flow path used on the throttle valve, including a throttle valve core, a spring and a throttle adjustment needle. One end of the throttle hole of the throttle valve core is the water inlet, the other end is the water outlet, and the water outlet is the insertion port of the throttle adjustment needle. One en...

AI Technical Summary

Problems solved by technology

[0003] The applicant disclosed in the invention patent No. 201410707814.9 a device for automatically cleaning the flow path used on the throttle valve, including a throttle valve core, a spring and a throttle adjustment needle. One end of the throttle hole of the throttle valve core is the water inlet, the other end is the water outlet, and the water outlet is the insertion port of the throttle adjustment needle. One end of the spring acts on the throttle valve core. , the other end acts on the valve body of the throttle valve or other parts of the throttle valve. The direction of the elastic force of the spring on the throttle valve core is opposite to the flow direction of the throttle hole. The throttle valve core can be controlled by water pressure and spring. Under the action, it moves back and forth in the valve body of the throttle valve. One end of the throttle regulating needle is set on the valve body of the throttle valve or other parts of the throttle valve, and the other end is inserted into the throttle hole of the throttle valve core, and can be connected with The orifice is a movable plug fit, so that the throttle spool will move in the valve under the change of water pressure, so that the throttle adjustment needle can be inserted into the orifice, so that the calcification condensed in the orifice will be smashed or poked Loose, not easy to condense, so that the throttle hole will not be blocked, the problem in the above technical solution: the throttle hole of this type of throttle valve is through an external self-cleaning mechanism, and then dredging and anti-blocking, the structure is complex

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