Self-closed valve for gas transmission pipeline
A transmission pipeline, self-closing technology, applied in the field of self-closing valves, can solve the problems of high production cost, inconvenient transportation and access of dangerous gases, hidden safety hazards, etc., and achieve the effect of simple structure
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[0018] like Figure 1-4 As shown, the self-closing valve used in the gas delivery pipeline according to the present invention includes a valve body with a T-shaped structure composed of an inlet passage 1, an outlet passage 2 and a control chamber 3. On the upper part of the control chamber 3 A valve cover 4 is provided for sealing, and a sealing ring 12 is arranged on the joint surface of the valve cover 4 and the valve body; The valve core 6 of the hemispherical structure in 2 is fixedly connected; the upper end of the valve stem 5 placed outside the valve cover 4 is provided with a control handle 7; The two ends are respectively connected with the valve stem 5 and the valve cover 4; a positioning plate 9 is slid on the valve stem 5 close to the valve core 6, and the outer peripheral surface of the positioning plate 9 is sealed with the inner wall of the control chamber 3 through a stainless steel elastic ring film 10 Connection; the valve stem 5 above the positioning plate...
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