A direct-acting electric control on-off valve

Abstract

The invention discloses a direct action type electric control on-off valve which comprises an electromagnetic coil, an armature, a valve body (2) and a mandrel. A valve seat (4) is arranged in the valve body (2). An upper channel communicated with the valve body inner cavity is formed in the valve body (2). A lower channel communicated with the valve body inner cavity is formed in the valve seat (4). An orifice at one end of the lower channel is machined into an inner conical surface (9). Sealed movable connection is formed among the mandrel, the upper channel and the lower channel. A flange plate is arranged on the mandrel. A corresponding outer conical surface (10) is machined on the flange plate, and a sealed valve is formed through the cooperation of the inner conical surface (9) and the outer conical surface (10). A first outlet (6) communicated with the lower channel and a second outlet (7) communicated with the valve body inner cavity are formed in the valve body (2) in the radial direction. A return spring (3) is arranged between the flange plate of the mandrel and the bottom surface of the valve body inner cavity. The diameter of a sealed cross section formed by the mandrel and the upper channel is identical to that of a sealed cross section formed by the mandrel and the lower channel. In this way, leakage is prevented, and soft-hard combined sealing and bidirectional ventilation can be achieved.

Description

Technical field [0001] The invention relates to a direct-acting electric control on-off valve, in particular to a small direct-acting electric control on-off valve for controlling the on-off of a high-pressure gas pipeline. Background technique [0002] Existing solenoid valves are generally divided into direct-acting solenoid valves and pilot-operated solenoid valves. At present, high-pressure electric control on-off valves in high-pressure gas pipelines above 30MPa mostly use pilot-operated electromagnetic control, and pilot-operated electromagnetic control valve body The volume is large, the structure is complex, and it is impossible to realize two-way ventilation and sealing and zero-pressure start; it adopts direct-acting electromagnetic control, and it is easy to leak due to the internal gas pressure difference. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a direct-acting electronically con...

AI Technical Summary

Problems solved by technology

[0002] Existing solenoid valves are generally divided into direct-acting solenoid valves and pilot-operated solenoid valves. At present, high-pressure electric control on-off valves in high-pressure gas pipelines above 30MPa mostly use pilot-operated electromagnetic control, and pilot-operated electromagnetic control valve body Large volume, complex structure, and can not achieve two-way ventilation seal and zero-pressure start; using direct-acting electromagnetic control, due to the internal gas pressure difference, it is easy to leak

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