Self-adaptively assembled large-diameter nuclear power wedge-shaped gate valve and mounting method

Abstract

The invention belongs to the field of valve design, provides a self-adaptive assembly large-diameter nuclear power wedge-shaped gate valve and a mounting method, and is mainly used for opening and closing fluid in a complex pipeline of a nuclear power station. The whole gate valve is composed of a valve cover, a valve rod nut, a hand wheel, a support nut, a support, a supporting sleeve, an oil cup, a thrust ball bearing, a nut, a grease injection connector cover, a grease injection connector, a sealing framework, a pressing plate, a bolt, a valve cover, a valve rod, a gate plate, a sealing seat, a valve body and a pollution discharge plug, and circulation and stopping of a flow channel are controlled through ascending and descending of the gate plate. The gate plate of the gate valve is wedge-shaped and can be matched and wedged with the sealing seat by self-weight, so that the sealing performance of the gate valve is enhanced. In addition, the gate valve body is provided with an assembly guide groove, the sealing seat is provided with an assembly guide table, and the assembly guide groove and the assembly guide table are matched to achieve self-adaptive positioning installation during gate valve assembly, so that the accuracy of gate valve assembly is guaranteed.

Description

technical field [0001] The invention belongs to the field of valve design, and relates to an adaptively assembled large-diameter nuclear power wedge gate valve and an installation method. Background technique [0002] A gate valve is a fluid machine that drives the gate up and down by the valve stem to control the opening and closing of the pipeline. It is widely used in complex piping systems. The gate valve is usually in the closed state. When the gate valve is closed, the sealing surface can only be sealed by the medium pressure, that is, the sealing surface of the gate plate is pressed to the sealing seat on the other side by the medium pressure to ensure the sealing of the sealing surface, that is, self-sealing. Most gate valves are forcibly sealed, that is, when the valve is closed, the gate must be forced against the valve seat by external force to ensure the tightness of the sealing surface. The wedge gate valve is named because the sealing surface is at a certain ...

AI Technical Summary

Problems solved by technology

The present invention solves the problem that the wedge angle of the sealing seat 18 is difficult to fit with the wedge angle of the gate plate 17 when the large-caliber nuclear power wedge gate valve is installed. 28 to realize the fast and accurate positioning and installation of the sealing seat 18, to ensure the accurate fit between the sealing surface of the sealing seat 18 and the sealing surface of the gate plate 17, and to design the grease injection port 31, the oil cup port 32, the sewage discharge port 33 and other structures , can realize the functions of grease injection sealing, oil lubrication, residual dirt removal, etc.

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