Automatic emission valve capable of realizing slow decompression

Abstract

The invention discloses an automatic emission valve capable of realizing slow decompression, and relates to the technical field of gas valves. According to the automatic emission valve, a first conical surface is arranged at the top of the inner wall of a valve body; the top of the valve body is sleeved with an upper bonnet; an inner cavity is formed in the upper bonnet; a gas inlet is formed in the top end of the upper bonnet; a cylindrical sliding way is arranged on the inner wall of the upper bonnet; a piston is glidingly connected with the cylindrical sliding way; a cylindrical guide shaftis arranged in the cylindrical sliding way and can move up and down and extend outwards to form a shoulder; a second conical surface surrounds the bottom of a valve plate; a plurality of through holes penetrate through the shoulder; a throttling hole penetrates through the valve plate; the valve body is connected with a lower bonnet; a gas outlet is formed in the bottom end of the lower bonnet; an elastic component is arranged between the bottom of the piston and the top of the lower bonnet; a first gas cavity is formed by the gas inlet, the through holes and the inner cavity; a second gas cavity is formed by the valve body, the lower bonnet and the gas outlet; and the first gas cavity communicates with the second gas cavity through the throttling hole. The automatic emission valve has the beneficial effects as follows that decompression flow-limiting emission of high-pressure gas and quick emission of low-pressure gas can be realized simultaneously.

Description

technical field [0001] The invention relates to a gas valve, in particular to a slow decompression automatic discharge valve. Background technique [0002] Pressure relief and discharge valves for high-pressure gas mainly include manual valves, pneumatic control valves, electric control valves, automatic pressure relief valves and check valves. Manual valves, whether they are ball valves, gate valves, globe valves, or throttle valves, require manual operation for their opening and closing or opening; pneumatic control valves and electric control valves need to control air source or power supply, and the size of their discharge channels is usually It is non-adjustable; while the automatic pressure relief valve and check valve in the prior art, its working principle is that when the pressure difference between the inlet and outlet gas becomes larger, the sealing member blocked by the elastic member is pushed open, the valve is opened, and the gas in the equipment is discharged...

AI Technical Summary

Problems solved by technology

Manual valves, whether they are ball valves, gate valves, globe valves, or throttle valves, require manual operation for their opening and closing or opening; pneumatic control valves and electric control valves need to control air source or power supply, and the size of their discharge channels is usually It is non-adjustable; while the automatic pressure relief valve and check valve in the prior art, its working principle is that when the pressure difference between the inlet and outlet gas becomes larger, the sealing member blocked by the elastic member is pushed open, the valve is opened, and the gas in the equipment is discharged. After the internal pressure drops suddenly, the elastic part resets, the valve closes automatically, and its discharge channel becomes smaller as the pressure difference between the inlet and outlet gas becomes smaller, so it cannot exhaust quickly at low pressure difference. Later, due to elastic fatigue, it needs to be replaced frequently, and the stroke of the piston or valve stem cannot be adjusted or is difficult to adjust

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