Elastic wedge-caulking type flat gate valve

Abstract

The invention relates to an elastic wedge-caulking type flat gate valve. The elastic wedge-caulking type flat gate valve comprises a valve body, a valve seat, a valve cover, a valve rod and gate plates, the gate plates are composed of a main gate plate and an auxiliary gate plate, the main gate plate and the auxiliary gate plate are in contact with each other through inclined surfaces in a cooperating mode, a limiting plate fixedly connected with the auxiliary gate plate is arranged above the main gate plate, a positioning pile is arranged at the bottom of an inner cavity of the valve body, anelastic separation device is arranged between the main gate plate and the auxiliary gate plate mainly, the elastic separation device adopts a hook-shaped spring to be arranged between the main gate plate and the auxiliary gate plate, one end of the hook-shaped spring is pressed into a hook groove formed in one side of the inclined surface of the main gate plate, the other end of the hook-shaped spring penetrates through the auxiliary gate plate, and is fixedly arranged on a mounting inclined plane manufactured on one side of a sealing surface of the auxiliary gate plate through a nut. Friction-free opening and closing between the sealing surfaces of the two sides of the gate plates and the sealing surface of the valve seat are achieved, and the advantages that opening and closing are light, the sealing performance is reliable, the service life is long and the like are achieved.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a wedge-tight flat gate valve. Background technique [0002] The wedge-tight slab gate valve is generally composed of a main gate and an auxiliary gate. The main gate and the auxiliary gate adopt a slope or a K-shaped slope to cooperate with each other. The main gate and the auxiliary gate are installed in the gate frame. , the main ram rises and separates from the inclined surface of the auxiliary ram, and then pulls the auxiliary ram to lift together. When the auxiliary ram is in place, it is wedged tightly by the inclined surface of the main ram and is tightly matched with the valve seat to reduce the opening and closing. The wear between the gate sealing surface and the valve seat sealing surface during the process. Its main disadvantage is that when the gate valve is closed for a long time, mutual adhesion is likely to occur between the slopes of the main gate and the auxiliary gate, ...

AI Technical Summary

Problems solved by technology

Its main disadvantage is that when the gate valve is closed for a long time, mutual adhesion is likely to occur between the slopes of the main gate and the auxiliary gate, and the opening torque is large. When the valve stem pulls the main gate to rise, the main gate and the auxiliary gate will The adhesive force between the inclined surfaces of the plates prevents the two from being out of contact in time, and it is easy to drive the auxiliary gate to move at the same time, causing the sealing surface of the gate and the sealing surface of the valve seat to wear and tear, affecting the sealing performance and service life of the product

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