Flange type high-temperature insulation high anticorrosive electric slow-closing stepless locked butterfly valve

Abstract

The invention discloses a flange type high-temperature insulation high anticorrosive electric slow-closing stepless locked butterfly valve, and relates to an improved valve on an industrial pipeline. The butterfly valve comprises a body; the body is provided with an electric slow-closing stepless locked control speed reducing device which is connected with a core shaft and mechanically connected with a valve body; a heat insulation shell is welded or cast on the flange-type valve body, and the sealing face of an inlet / outlet connecting pipe device is hermetically coupled with a butterfly plate to fulfill the purpose of sealing; the butterfly plate has three-eccentric effect of a cam, and eliminates all contact friction between a sealing element and a valve seat in the stroke of the valve, so that the butterfly plate has the sealing effect all the time when being frequently opened and closed; a sealing ring is contacted with the valve seat at a certain contact angle, can uniformly encircle the circumferential face of the valve seat and equivalently forms an elongated wedge shape, so that the acting force of the sealing ring is totally and uniformly distributed on the valve seat; and because the valve seat is stressed, a mechanical stopper is not needed when the electric slow-closing stepless locked control speed reducing device of the valve is closed.

Description

Technical field: [0001] The present invention relates to an improved valve for industrial pipelines, which is a valve with a thin body and can withstand high-temperature fluid at 455°C, especially an electric slow-closing stepless valve with a hardness lower than 316L hardness of strong phosphoric acid and particles. Tighten the butterfly valve. Background technique: [0002] Butterfly valves on existing pipelines, such as thin rubber-lined and fluorine-lined gate valves, can only be used below 120°C because the sealing materials cannot withstand temperatures above 120°C. Manual butterfly valves can only be sealed by means of five-stage positioning to open. The rubber-lined and fluorine-lined soft materials are resiliently sealed and can only be used at low temperatures. If there are residues, particles, and fast flow in pipeline transportation, they will break the sealing material and cannot be sealed. The five-stage positioning is opened, and it is rigidly sealed with a h...

AI Technical Summary

Problems solved by technology

[0002] Butterfly valves on existing pipelines, such as thin rubber-lined and fluorine-lined gate valves, can only be used below 120°C because the sealing materials cannot withstand temperatures above 120°C. Manual butterfly valves can only be sealed by means of five-stage positioning to open. Rubber-lined, fluorine-lined soft material has a rebound seal and can only be used at low temperature. If there is residue, granular, and fast flow in pipeline transportation, it will break the sealing material and cannot be sealed.

Five-stage positioning opening, rigid sealing with hard material, although it can be used at high temperature, there is no rebound seal of soft material, it cannot be sealed, and it can only be used at low pressure

Because other gate valves are very heavy, they cannot be installed on suspended pipelines. If they are installed, a lot of brackets must be designed, which wastes a lot of metal and building materials and man-hours, and affects the traffic under the pipeline.

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