Rocker-type non-rising stem seal gate valve

Abstract

The invention relates to a rocker-type non-rising stem seal gate valve which comprises a valve body, a valve cover, gate plates and a valve rod. The rocker-type non-rising stem seal gate valve is particularly characterized in that the motion mode of a gate plate of a conventional gate valve is changed; the two gate plates are utilized for sealing; the sealing direction is the same as the direction of a fluid; furthermore, a conventional method for rotating a valve rod by utilizing a hand wheel is improved, a rocking rod is rotated by utilizing a driving rod, and the driving rod can be hidden; by adoption of the rocker-type non-rising stem seal gate valve provided by the invention, the friction between the gate plates and a valve seat can be effectively reduced, and the service life of the valve seat can be prolonged; and meanwhile, a way to open and close a gate more conveniently and safely is adopted, so that the usage effect and the usage experience are better.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a rocker type concealed rod sealed gate valve with novel structure and excellent effect. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. [0003] Among them, the movement direction of the traditional gate valve gate is perpendicular to the direction of the fluid. When the gate valve is sealed, the pressure of the fluid is usually used to make the gate and the valve seat tightly connected to achieve static sealing. In this case, when the gate valve is opened and closed due to the valve Excessive extrusion between the seat and the gate will generate strong friction. During the movement of the gate, it is easy to generate friction and heat, and it is easy to cause deformation of the v...

AI Technical Summary

Problems solved by technology

[0003] Among them, the movement direction of the traditional gate valve gate is perpendicular to the direction of the fluid. When the gate valve is sealed, the pressure of the fluid is usually used to make the gate and the valve seat tightly connected to achieve static sealing. In this case, when the gate valve is opened and closed due to the valve Excessive extrusion between the seat and the gate will generate strong friction. During the movement of the gate, it is easy to generate friction and heat, and it is easy to cause deformation of the valve seat and affect its service life.

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