Processing method of butterfly valve sealing mechanism

Abstract

The invention relates to a processing method of a butterfly valve sealing mechanism. A butterfly valve comprises a valve body, a butterfly plate and a valve rod, wherein a shaft hole is arranged in the valve body, the valve rod passes through the shaft hole to be fixedly connected with the butterfly plate, and the valve body and the butterfly plate are matched for forming a path capable of being opened and closed. The processing method comprises the following steps that a circle of annular groove is arranged on the valve body, the forming position of the groove is positioned on the valve body corresponding to the circumference surface of the butterfly plate in the closed state, at least one hole is arranged in the valve body, and in addition, the hole is communicated with the groove; the outer circumference surface of one annular sealing ring is made into a dovetail groove shape for forming a circular of dovetail groove shape edge part, an opening of the dovetail groove shape edge part of the sealing ring is inserted in a direction of facing the bottom surface of the groove, the butterfly plate is closed, in addition, resin is injected into the groove through the hole until the sealing ring and the butterfly plate are completely sealed; and the hole is sealed, the resin is cured, and finally, the processing of the sealing mechanism is completed. The structure of the groove and the sealing ring is used for realizing the sealing with the valve body and the butterfly plate, the structure is simple, the sealing effect is good, and the processing and the on-line maintenance are convenient.

Description

technical field [0001] The invention relates to a processing method of a sealing mechanism of a butterfly valve. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure, and it can also be used for switch control of low-pressure pipeline medium. Butterfly valve refers to a valve whose closing part (disc or butterfly plate) is a disc, which rotates around the valve shaft to open and close. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. Butterfly valves are suitable for pipelines conveying various corrosive and non-corrosive fluid media in engineering systems such as generators, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental p...

AI Technical Summary

Problems solved by technology

[0003]The key to the opening and closing of the butterfly valve is the tightness between the valve body and the butterfly plate. Since the butterfly plate is in the state of opening and closing for a long time, the friction between the butterfly plate and the valve body More, both of them are prone to wear and tear, resulting in poor sealing or no sealing, which seriously makes the entire butterfly valve scrapped, and its maintenance is also very inconvenient

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