Straight-flow shut-off valve sealed with elastic valve seat under fluid pressure

Abstract

The invention relates to a straight-flow shut-off valve which is sealed with an elastic valve seat under fluid pressure. According to the straight-flow shut-off valve, a support body which is arranged on a circular table of a valve flap additionally is connected with the valve flap and the circular table by a rib plate, and one end of the support body is supported in an annular groove which is bulged outwards out of the upper part of a valve body; a pin shaft is connected with a hole in the support body by a shaft hole of the valve body; a connecting body which extends out of one side is arranged at the position which is close to the upper part of a center circle on one side of a sealing body on the valve flap; a notch in the end of a valve rod is matched with two planes of the connecting body, and a straight notch is connected with a pin arranged in a pin hole in the tail end of the valve rod; an angle alpha of an inlet flow channel A and an outlet flow channel B of a valve body is 45 degrees; the circular arcs of the sealing ends of elastic valve seats are consistent with those of the valve bodies; the excircle is matched with a flow channel hole in the valve body; and upper and lower planes outside the elastic valve seat are hermetically connected with a lower sealing gasket in the valve body and an upper sealing gasket in a valve cover respectively.

Description

technical field [0001] The invention belongs to valves, in particular to a direct-flow shut-off valve utilizing fluid pressure and sealing with an elastic valve seat. Background technique [0002] There are basically five categories of general-purpose valves, which are sorted by usage: 1. Gate valves, 2. Globe valves, 3. Check valves, 4. Ball valves, 5. Butterfly valves. Among them, ball valves and butterfly valves are valves with rapid technological development in recent years, and there are many new designs. Therefore, the latter two types of valves have made rapid progress, made great contributions to the market, and their demand is further increasing. The widely used gate valves and globe valves have basically not changed much, especially the globe valves, which still stay in the long historical stage of the last century. [0003] Globe valves for petroleum and petrochemical industries are usually divided into two categories, one is vertically installed globe valves, an...

AI Technical Summary

Problems solved by technology

The advantages are obvious, but the disadvantage is that it is not very convenient to operate, and it is greatly affected by space, location, and location. Especially in the aspect of production automation control, it is more difficult to operate the valve as an electric device, or it cannot be implemented. Therefore, to achieve the purpose of reducing fluid resistance with this valve, it is still very limited, and the use of it cannot achieve satisfactory results.

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