Novel manual diaphragm valve

Abstract

The invention relates to the field of mechanical valves, in particular to a novel manual diaphragm valve. The novel manual diaphragm valve is characterized in that the connecting part of the lower end of a valve rod and a valve element are supported and fixed through two thrust ball bearings; the thrust ball bearing located at the upper end of the valve element and the upper surface of the valve element are axially positioned through a shaft shoulder of the valve rod; the thrust ball bearing at the upper end of the valve element works when the valve is closed; the thrust ball bearing located at an opening groove part of the valve element and a clamping spring installed on the valve rod are axially positioned through the upper surface of an opening groove of the valve element; and the thrust ball bearing at the opening groove part of the valve element works when the valve is opened. Compared with the prior art, the novel manual diaphragm valve has the beneficial effects that the service life of a diaphragm leaf is prolonged, the fake stroke phenomenon is eliminated, and the operation precision of the valve is improved; the diaphragm leaf is better attached to the sealing face of a valve body, and the sealing performance is improved; and circulation of media is improved, and circulation dead corners are avoided.

Description

[technical field] [0001] The invention relates to the field of mechanical valves, in particular to a novel manual diaphragm valve. [Background technique] [0002] Diaphragm valve is a special type of cut-off valve. Its most prominent feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper bonnet, which not only ensures the purity of the working medium, but also makes the bonnet above the diaphragm, Parts such as the valve stem and disc are not corroded by the medium, the packing sealing structure is omitted, and there is no leakage of the medium. The diaphragm made of soft material has better sealing performance. The closing and opening of the diaphragm valve is realized by controlling the up and down movement of the diaphragm, so its life depends on the fatigue resistance of the diaphragm. [0003] see figure 1 , at present, the diaphragm valve structure mainly includes valve body, bonnet, handwheel, valve stem,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art, provide a new type of manual diaphragm valve, solve the metal friction between the valve stem and the valve core during the use of the diaphragm valve, produce iron pins, reduce the service life of the diaphragm, and have false positives. Stroke phenomenon, leading to problems such as poor operation accuracy

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