Cryogenic fluid electromagnetic valve

Abstract

Disclosed is a low-temperature fluid electromagnetic valve, which relates to a fluid valve structure. The prior art has shortages of poor sealing and unreliable operation. A fluid inlet is arranged on the inner wall of a cavity of a valve seat, the fluid inlet is connected with a fluid inlet pipe, a fluid outlet is also arranged on the inner wall of the cavity of the valve seat, the fluid outlet is connected with a fluid outlet pipe, a valve core which can perform lifting operation to control the open and close states of the fluid outlet is arranged in the electromagnetic valve, and an elastic piece is arranged between the valve core and a coil seat. The sealing is efficiently improved by improving the positions of the fluid inlet and the fluid outlet of the electromagnetic valve, and reliable operation, convenient process and long service life of the electromagnetic valve are guaranteed.

Description

【Technical field】 [0001] The invention relates to a fluid valve structure, in particular to a low-temperature fluid electromagnetic valve. 【Background technique】 [0002] The delivery of cryogenic fluids (such as liquid nitrogen, liquid oxygen, etc.) is involved in fields such as bioengineering, medical applications, and engine cooling, and solenoid valves are usually used to control the flow of fluids. [0003] The existing cryogenic fluid solenoid valve generally includes a valve seat and a coil seat. There is a cavity in the valve seat, and the liquid inlet is opened at the center of the bottom of the cavity. The valve core and the liquid outlet are arranged at other positions on the side wall or the bottom of the cavity, and the liquid inlet and the liquid outlet are respectively connected to the liquid inlet and the liquid outlet. When it is in the off state, the lower end of the spool presses the liquid inlet tightly to block the fluid flow; when it is opened, the val...

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Problems solved by technology

[0004] The solenoid valve with the above structure generally relies on the tension of the spring to press down on the valve core when it is in the off state, and the delivered fluid has a certain pressure, which will exert an upward force on the valve core at the liquid inlet. The force exceeds the tension of the spring, the fluid will push the valve core up, and part of the fluid will flow out from the liquid outlet, causing leakage and unreliable work

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