High-speed electromagnetic pulse gas valve device

Abstract

The invention discloses a high-speed electromagnetic pulse gas valve device. A cavity is formed between a valve body (18) and a gas chamber shell (6) to serve a a gas chamber, a gas inlet (7) is usedfor introducing working gas into the cavity, and the diffusion time of a magnetic field generated by a disc-shaped coil (16) and passing through a stainless steel sheet (13) is less than 1 microsecond. The gas inlet (7) is designed in the upper portion of the back surface of a piston (12), and the gas flows through a piston hole (11) in the piston (12), so that the pressure difference of the two sides of the piston (12) and the elastic force of a spring (9) act together to serve as a restoring force for the piston (12) to be closed downwards, thereby reducing the motion time of the closing process. By adjusting the magnitude of pulse current of the disc-shaped coil (16), the pop-up height of the piston (12) can be adjusted so as to change the movement time of opening and closing of the piston (12) and the gas intake amount. The disc-shaped coil (16) is isolated out of the gas chamber through the stainless steel sheet (13). Tests prove that a gas valve can be used for pulse gas intake of flammable and explosive gases such as hydrogen, and the bearable working pressure of the gas can be more than 0.3 Mpa.

Description

technical field [0001] The invention relates to the technical field of electromagnetic gas valves, in particular to a high-speed electromagnetic pulse gas valve device. Background technique [0002] The pulse width of traditional electromagnetic gas valves is usually more than tens of milliseconds. When the valve is closed, the injected gas has already diffused evenly in the vacuum chamber. If a certain amount of gas needs to be injected in a shorter time (such as on the order of milliseconds), or the gas needs to be distributed in a local area of ​​the vacuum chamber before the experimental operation, these traditional electromagnetic valves can no longer meet the demand. [0003] The reasons for the slow action of traditional solenoid valves can be summarized as follows: 1) The mass of the moving iron core of the traditional direct-acting solenoid valve is relatively large, resulting in a slow movement response time of the moving iron core; 2) Due to the winding of the ext...

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Problems solved by technology

If a certain amount of gas needs to be injected in a shorter time (such as on the order of milliseconds), or the gas needs to be distributed in a local area of ​​the vacuum chamber before the experimental operation, these traditional electromagnetic valves can no longer meet the demand

[0003] The reasons for the slow action of traditional solenoid valves can be summarized as follows: 1) The mass of the moving iron core of the traditional direct-acting solenoid valve is relatively large, resulting in a slow movement response time of the moving iron core; 2) Due to the winding of the external coil The wire diameters of the static iron core and the moving iron core as a piston are usually several centimeters along the direction of magnetic field diffusion, resulting in the time required for the magnetic field generated by the external coil to completely diffuse from the static iron core to the moving iron core to reach hundreds of microseconds. When the power supply is stopped, the response of the moving iron core will also be delayed by hundreds of microseconds

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