Anti-blocking and scouring-resistant stop valve

Abstract

The invention relates to an anti-blocking and scouring-resistant stop valve which comprises a valve and a bonnet. A valve seat assembly is arranged on the valve and is provided with a valve ball, a valve stem and a lower shaft are respectively arranged on the upper side and the lower side of the valve ball, the valve ball is coaxially and centrally constrained by the lower shaft and the valve stem and can carry out rotation action along the coaxial central lines of the lower shaft and the valve stem, the valve seat assembly fittingly clings to the valve ball, the valve, the bonnet, the valve ball and the valve seat assembly are provided with coaxial straight circular flow channels, the bonnet is provided with a medium inlet end, the valve is provided with a flow channel outlet end, and the size of the inlet end of the bonnet is consistent with the inner diameter of a connecting pipeline and is inwardly reduced until the size of the inlet end of the bonnet is identical to the inner diameter of the valve seat assembly and the inner diameter of the valve ball, so that a flared inlet flow channel of the inlet end of the bonnet can be formed. The anti-blocking and scouring-resistant stop valve has the advantages that actual problems of material sedimentation and incapability of resisting scouring can be thoroughly solved by the aid of the anti-blocking and scouring-resistant stop valve, and the production running and operational safety can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an anti-blocking and erosion-resistant shut-off valve. Background technique [0002] In the transportation of powder media or solid particles, especially in the transportation of silicon powder in the polysilicon industry and the transportation of coal powder in the coal chemical industry, etc., disc valves are often used for cutting and conducting. The working principle of the disc valve is: the valve has a Or a pair of valve discs. When working, the driving device makes the valve disc rotate a certain angle or slide a certain stroke in a straight line through the action of the valve stem and rocker arm to realize the switch of the valve. The fixed valve seat is matched with the valve disc. The disc fits closely with the valve seat by means of a spring, and the valve disc and the valve seat are installed inside the valve cavity, and has a large cavity to meet the space requiremen...

AI Technical Summary

Problems solved by technology

[0005] In view of the above technical problems of the prior art, the purpose of the present invention is to provide an anti-clogging and erosion-resistant shut-off valve, which can solve the problems of material deposition, clogging or switch failure in applications such as powder media or solid particle media, and does not require Setting up the purging device can realize functions such as removing medium deposits and automatically cleaning the valve cavity.

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