A parallel double brace gate valve

Abstract

The invention belongs to the technical field of pipeline valves, and discloses a gate valve with parallel double braces, which includes a valve body, a valve stem, a wedge pressure block, a first valve plate, a second valve plate and a rotating shaft; the valve body is provided with a control hole, a wedge The pressing block is located in the control hole and is provided with a T-shaped hole. The rotating shaft is a T-shaped shaft located in the T-shaped hole and can rotate relative to the wedge pressing block; the first valve plate is a wedge-shaped plate, and the wedge-shaped surface of the first valve plate is in contact with the wedge The wedge-shaped surfaces of the pressure block are parallel to each other, and the wedge-shaped surface of the first valve plate is provided with a first connecting groove; the second valve plate is a wedge-shaped plate, and the wedge-shaped surface of the second valve plate is parallel to the other wedge-shaped surface of the wedge pressure block. The wedge-shaped surface of the second valve plate is provided with a second connecting groove; the valve rod drives the wedge pressure block to move along the control hole; the wedge pressure block can drive the first valve plate and the second valve plate to move through the rotating shaft, and the wedge pressure block can also move Can move relative to the first valve plate and the second valve plate. The parallel double spreader gate valve of the present invention can be used in different installation modes and has better stability and reliability.

Description

technical field [0001] The invention belongs to the technical field of pipeline valves, and in particular relates to a parallel double support plate gate valve. Background technique [0002] Gate valve is a valve used to fully open or fully close the medium flowing through the pipeline on the transportation pipeline or equipment. It is mainly used in the fields of petroleum, natural gas and chemical industry. In my country, the traditional gate valves currently produced mainly include flat gate valves and wedge gate valves. Among them, the flat gate valve always has two floating valve seats with pre-tightening force and the sealing surface of the valve plate rubbing against each other during the operation process, so the sealing life is low, but the advantage is that the output force of the actuator is small, and the opening and closing operation is stable; The gate valve has the advantages of good sealing performance and long service life, but the disadvantage is that the ...

AI Technical Summary

Problems solved by technology

[0004] 1. The parallel double brace gate valve in the prior art can only be installed in the vertical direction, so that the brace can fall by its own weight. When the gate valve is installed horizontally, the brace cannot move on the wedge block, so Unable to open and close, resulting in the failure of normal use of the parallel double brace gate valve;

[0005] 2. The parallel double braced gate valve in the prior art often blocks the valve plate due to impurities in the medium, or the excessive friction between the valve plate and the valve body causes the valve plate to open in advance before it moves to the designated position. The gate valve cannot be closed normally, resulting in poor stability and reliability of the parallel double brace gate valve

Images