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Novel three-way reversing valve

A three-way reversing valve, a new type of technology, used in fluid pressure actuating devices, servo motor components, mechanical equipment, etc., can solve problems such as low service life, air leakage or air leakage, and achieve high operating pressure and low cost. Effect

Inactive Publication Date: 2014-08-20
WUZHONG INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Products with this structure require reversing pistons, E-rings, and reversing chambers to have high processing requirements during processing, and when the sealing ring is worn, it is easy to cause air leakage or gas leakage, and the service life is low

Method used

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Effect test

Embodiment Construction

[0014] like figure 2 , 3 As shown, the present invention is a new type of three-way reversing valve, including a hollow reversing chamber 3, and an air inlet, an air outlet and a reversing port are respectively opened on the side of the reversing chamber 3, and the reversing The port is located between the air inlet and the air outlet, a piston chamber 1 is installed at the top of the reversing chamber 3, a signal inlet is opened on the piston chamber 1, and a base 5 is installed at the bottom end of the reversing chamber 3; A guide piston 82 is installed in the reversing chamber 3 , the top of the guide piston 82 is connected with an air control piston 2 , the air control piston 2 is located in the air pressure chamber 6 in the middle of the piston chamber 1 , and the air control piston 2 is The outer wall is hermetically sealed with the inner wall of the piston cavity 1; an annular first boss-type sealing valve seat 7 is arranged on the inner wall of the reversing cavity 3...

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Abstract

The invention relates to a novel three-way reversing valve. The novel three-way reversing valve is characterized by comprising a hollow reversing cavity (3), an air inlet, an air outlet and a reversing opening are respectively formed in the side face of the reversing cavity (3), the reversing opening is formed between the air inlet and the air outlet, a piston cavity (1) is formed in the top end of the reversing cavity (3), a signal inlet is formed in the piston cavity (1), a base (5) is arranged at the bottom end of the reversing cavity (3), a guide piston (82) is arranged in the reversing cavity (3), the top of the guide piston (82) is connected with a pneumatic piston (2), the pneumatic piston (2) is arranged in the piston cavity (1), and the outer wall of the pneumatic piston (2) and the inner wall of the piston cavity (1) are in gas seal. According to the reversing valve, a compressing structure of a metal valve base and V-type rubber is adopted by the sealing structure, and the defects that machining difficulty of a traditional structure is large, and after a sealing ring is abraded, air leakage is prone to happening are overcome.

Description

technical field [0001] The invention relates to a novel three-way reversing valve. Background technique [0002] A traditional new three-way reversing valve structure such as figure 1 Shown: When the input signal pressure at port S is higher than the pressure at the switching point of the air control valve, the signal air pressure pushes the air control piston and the reversing piston to move downward, the P port is connected to the A port, and the E port is connected to the A port and the P port. When the input signal pressure at port S is lower than the pressure at the switching point of the air control valve, the air control piston moves upwards under the action of the restoring force of the spring. port to port A is turned on. The internal reversing piston of the air control valve adopts the traditional spool valve structure with E-ring (or Y-ring) circumferential sealing. Products with this structure require high processing requirements for reversing pistons, E-rings...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 马玉山余少华姚敏郭中山
Owner WUZHONG INSTR
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