A method and device for improving the sealing performance of a water filling valve for an ultra-high water head gate

Abstract

The invention discloses a method and device for improving the sealing performance of an ultra-high water head gate water filling valve. According to the method, a plane water seal and a plunger water seal are organically combined to form two sealing structures of different forms, and therefore the sealing performance of the ultra-high water head gate water filling valve is improved; to prevent a P-type water seal from being excessively extruded, rectangular bearing rings are arranged at the bottom face of a water seal installing plate; an inverted-frustum type plunger body is adopted in the plunger water seal, a conical face of the plunger water seal and a horn mouth of a top pipe opening of a bend assembly are sealed, a set of annular grooves are formed in the conical face of the plunger water seal so that the buffering performance of the plunger water seal can be improved, and the abrasion loss caused when the conical face of the plunger water seal makes contact with the bend assembly in a sliding manner is effectively reduced; and a limiting ring is arranged on the edge at the position, making contact with the bottom face of the water seal installing plate, of the plunger water seal, accurate positioning during installing is facilitated, and lateral deformation of the plunger water seal is relieved. According to the method and device for improving the sealing performance of the ultra-high water head gate water filling valve, the sealing performance is good, the water filling speed is high, maintaining and overhauling are facilitated, a valve column and lug plates slide flexibly, and the water filling valve can be safely closed.

Description

technical field [0001] The invention relates to a method and a device for improving the sealing performance of a water filling valve of an ultra-high water head gate, and belongs to the technical field of gate sealing in water conservancy and hydropower projects. Background technique [0002] Plane maintenance gates, emergency gates or fast gates are generally required to be opened in still water considering reducing the opening force. Therefore, before the maintenance gate, emergency gate or fast gate is opened, it is necessary to fill the gate section or the water pipeline with hydraulic pressure to balance the water pressure on both sides of the gate. [0003] The commonly used water pressure balance method is to use a bypass valve or a water filling valve to fill the water pressure. [0004] For the water filling valve, it is usually divided into three forms: gland type, plunger type and sub-gate type. Among them, the gland type is generally used for the downstream wat...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device for improving the sealing performance of the water filling valve of an ultra-high water head gate, so as to overcome the technical problem in the prior art that the water filling valve is not closed tightly and water leakage occurs when there are foreign objects on the top of the gate.

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