Novel pilot-operated type electromagnetic valve group

Abstract

The invention relates to the technical field of fluid control automation, in particular to a novel pilot-operated type electromagnetic valve group. The novel pilot-operated type electromagnetic valve group comprises a switch valve plate, wherein valve decks are installed on the surface of one side of the switch valve plate, air holes are formed in the centers of the valve decks, second sleeves are arranged in the switch valve plate, plungers are installed in the second sleeves, springs are installed in the plungers, air trapping mechanism hollow pipes penetrate through the interiors of the springs, needle valves are fixed to the uppermost end of the switch valve plate through needle valve fixing nuts, a cover plate is installed between the needle valves, electromagnetic valves are installed on the surface of the other side of the switch valve plate, first valve cores are installed in the switch valve plate, and a pilot-operated air opening is formed in one side of each first valve core. The novel pilot-operated type electromagnetic valve group has the beneficial effects that a sealing ring installed on the plunger in the prior art is omitted, reversing of the plungers in the electromagnetic valve group is achieved by controlling the pilot air pressure and the spring force, use of the sealing ring is reduced, and the requirement of the electromagnetic valves for fluid is lowered.

Description

technical field [0001] The invention relates to the technical field of fluid control automation, in particular to a novel pilot solenoid valve group. Background technique [0002] The role of the solenoid valve is mainly to control the progress and flow of various fluids, such as water, oil, chemical liquids, etc., based on parameters such as temperature, pressure and flow. Due to its cheapness, simplicity, fast action, easy installation, and easy maintenance, it has become the first choice for fluid control automation. [0003] The current solenoid valve has high requirements on the oil content of the air supply. The air supply with large oil content or the air supply with small oil content will corrode the sealing ring and accelerate the loss of the sealing ring. After working for a long time, the surface roughness of the solenoid valve core will continue to increase, resulting in The solenoid valve changes slowly, which affects the service life of the solenoid valve. C...

AI Technical Summary

Problems solved by technology

[0003] The current solenoid valve has high requirements on the oil content of the air supply. The air supply with large oil content or the air supply with small oil content will corrode the sealing ring and accelerate the loss of the sealing ring. After working for a long time, the surface roughness of the solenoid valve core will continue to increase, resulting in The solenoid valve changes slowly, which affects the service life of the solenoid valve

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