A parallel gate valve

Abstract

The invention relates to a parallel gate valve. The gate valve comprises a valve body, a valve cover, a valve rod, a valve base and a gate component, wherein the gate component and the valve base fit to form a seal pair; the gate component comprises a gate frame; an inverted T-shaped groove is formed in the upper end of the gate frame; meanwhile, an inverted T-shaped mounting piece is arranged at the lower end of the valve rod; the mounting piece is corresponding to the inverted T-shaped groove on the gate frame; a left gate and a right gate are respectively mounted at the left and right ends of the gate frame; a spring is mounted between the left gate and the right gate; and the upper ends of the left gate and the right gate are fixed on the gate frame through a connecting plate. The parallel gate valve has the following advantages: the threaded connection between the valve rod and the gate frame is changed to the T-shaped groove connection, the left gate and the right gate are fixed on the gate frame through the connecting plate, and a movable connecting mode is adopted in the structure, so that the fixation is not needed, the installation and the disassembly are convenient, the centering requirement is low, and the machining precision and the perpendicularity requirement are correspondingly reduced.

Description

technical field [0001] The invention relates to a valve, in particular to a parallel gate valve with simple structure and convenient installation and disassembly. Background technique [0002] The gate valve is one of the most commonly used shut-off valves, which is mainly used to connect or cut off the medium in the pipeline, and is not used to adjust the flow of the medium. The range of pressure, temperature and diameter used is very large, especially for medium and large diameter pipes. The opening and closing part of the gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces, and the two sealing surfaces of the most commonly used pattern gate valve form a wedge, and the wedge angle varies with the valve parameters. [0003] In the traditional gate valve, the installation between the gate...

AI Technical Summary

Problems solved by technology

In the above structure, when installing or disassembling, many people are required to cooperate to complete it, which consumes a lot of manual labor, and also needs to use a variety of tools during assembly. In addition, for the gate and gate frame, valve stem and The connection between the gate frames needs to be threaded, so good alignment is required, the requirements for machining accuracy and verticality are high, and the corresponding production cost is high

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