A Large Diameter Pilot Unloading Solenoid Valve

Abstract

The invention relates to a large-caliber pilot unloading type electromagnetic valve which comprises a valve body, a valve cover, a valve core component and an electromagnetic valve drive control component; the valve core component comprises a main valve core and a pilot valve core; the main valve core is positioned at a valve base; the upper part of the main valve core is of a cylindrical structure, and a pressure relief hole is formed in the bottom of the cylindrical structure; a throttle hole and a communicating hole are also formed in the main valve core; the throttle hole is formed in the medium inlet side of the valve body; one end of the communicating hole is communicated with an upper cavity of the main valve core, and the other end is communicated with the pressure relief hole; the pilot valve core is arranged in the cylindrical structure of the main valve core in a nesting manner, and a guide ring is mounted between the main valve core and the pilot valve core; when the pilot valve core moves, the main valve core is driven by the guide ring to move. The electromagnetic valve further comprises a diaphragm; the inner edge part of the diaphragm is fixedly connected with the main valve core, and the outer edge part of the diaphragm is fixedly connected with the valve body; the caliber of the solenoid valve is greater than or equal to 50 mm, the caliber of the valve seat is greater than or equal to 80 mm, and the upward / downward movement stroke of an armature is greater than or equal to 6 mm. The large-caliber pilot unloading type electromagnetic valve provided by the invention is suitable for working conditions under which the drift diameter is large and the flow resistance is small, and is small in size and light in weight.

Description

technical field [0001] The invention relates to a solenoid valve, in particular to a large-diameter pilot unloading solenoid valve, which is suitable for use as a control valve of a low-pressure large-diameter gas pipeline. The large-diameter solenoid valve mentioned in the present invention refers to a solenoid valve with a diameter ≥ 50 mm. Background technique [0002] The environmental control and life protection system of a space station needs to be equipped with a large-diameter solenoid valve for emergency pressure relief. It is proposed that the diameter is not less than 50mm, the working pressure is 0-0.15MPa, the seal is reliable, the weight is not more than 2kg, and the working life is not less than 3000 times. Design requirements. [0003] The existing commonly used solenoid valves include pilot solenoid valves and direct-acting solenoid valves. The disadvantages of these two valves are: [0004] Pilot-operated solenoid valve structure, its opening requires the...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the existing solenoid valve cannot meet the above-mentioned design requirements of the environmental control and life support system of the space station

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