Sealing sluice valve

Abstract

The invention discloses a sealing sluice valve which comprises a valve body and a flashboard. One end of the inner wall of the valve body is provided with an adjusting jacking table. The other end of the inner wall of the valve body is provided with a guide rail. The flashboard is arranged in the valve body in the manner that the adjusting jacking table is matched with the guide rail. The upper end and the lower end of the flashboard are provided with sealing balls. The sealing balls are evenly arranged on the upper side and the lower side of the flashboard. The end, arranged on the guide rail, of the flashboard is further provided with a sealing ring. The adjusting jacking table comprises a jacking rod and a nut. One end of the jacking rod abuts against the flashboard. The other end of the jacking rod extends out of the valve body and is fixed through a nut. A sealing cover is arranged outside the nut. By means of the scheme, the defect that a floating valve seat of a similar original valve for vertical or inclined pipelines is pressed by the flashboard and bears medium pressure for a long time is overcome, the problem that the floating valve seat fails due to the fact that the floating valve seat is pressed for a long time and does not float is solved, the phenomenon of valve sealing failure is eliminated, and reliable bidirectional sealing of the inlet end and the outlet end of the valve is guaranteed.

Description

technical field [0001] The invention relates to a sealed gate valve, which belongs to the technical field of gate valves. Background technique [0002] The gate valve is simple in structure and reliable in performance. It is widely used in petrochemical, refining, oil and gas, city gas and other flammable and explosive hazardous occasions. In the previous production of valve products, the gap between the casting and the width of the guide rail groove of the valve body is relatively large. In the process of opening and closing, the rod is not only affected by the pressure of the medium, but also by the gravity of the gate and the medium. When the valve is installed in a vertical pipeline or installed on the side of a horizontal pipeline, the opening and closing torque of the valve is increased during the opening and closing process. , It also accelerates the wear between the valve stem and the stem nut transmission pair, and even causes premature failure of the transmission p...

AI Technical Summary

Problems solved by technology

[0002] The gate valve has simple structure and reliable performance, and is widely used in petrochemical, refining, oil and gas, city gas and other flammable and explosive hazardous occasions. In the previous production of valve products, the gap between the casting and the width of the guide rail groove of the valve body is relatively large. During the opening and closing process, the rod is not only affected by the pressure of the medium, but also by the gravity of the gate and the medium. When the valve is installed in a vertical pipeline or installed on the side of a horizontal pipeline, the opening and closing torque of the valve is increased during the opening and closing process. , also accelerates the wear between the valve stem and the stem nut transmission pair, and even causes premature failure of the transmission pair, therefore, it needs to be improved

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