Automatic blowdown valve

Abstract

The invention relates to an automatic blowdown valve, and belongs to the field of blowdown valves. The automatic blowdown valve comprises a valve body (5), and is characterized in that: the valve body (5) is divided into an upper part and a lower part which are in threaded connection; the upper part in the valve body (5) is provided with a valve core (3); the valve body (5) above the valve cover (3) is provided with a rubber sealing ring (2); a lining is arranged in the rubber sealing ring (2); three blowdown holes (4) are uniformly distributed at the upper periphery of the upper part valve body (5); a spring (6) is arranged in the valve body (5) at the bottom of the valve core (3); and a jacket (1) is sleeved outside the valve body (5). The automatic blowdown valve has the advantages of sealing reliability, small volume, light weight, good blowdown effect and the like, and is convenient to open.

Description

technical field [0001] An automatic blowdown valve belongs to the field of blowdown valves. Background technique [0002] The blowdown valve of the valve is generally installed in the middle cavity of the valve. Most of the blowdown of the existing valves adopts the plug blowdown of the tapered pipe thread for sealing or the sealing method of non-metallic sealing materials such as polytetrafluoroethylene and metal, and the tapered pipe for sealing is used. The sewage valve with threaded plug is actually a plug processed with tapered pipe thread for sealing. When sewage needs to be discharged, the plug should be unscrewed from the valve body to realize that the middle cavity of the valve is connected with the atmosphere and discharge the middle cavity of the valve. The main disadvantage is that after the plug is unscrewed from the valve body many times, the thread used for sealing will be damaged, resulting in unreliable sealing, short service life, time-consuming and labor-i...

AI Technical Summary

Problems solved by technology

[0002] The blowdown valve of the valve is generally installed in the middle cavity of the valve. Most of the blowdown of the existing valves adopts the plug blowdown of the tapered pipe thread for sealing or the sealing method of non-metallic sealing materials such as polytetrafluoroethylene and metal, and the tapered pipe for sealing is used. The sewage valve with threaded plug is actually a plug processed with tapered pipe thread for sealing. When sewage needs to be discharged, the plug should be unscrewed from the valve body to realize that the middle cavity of the valve is connected with the atmosphere and discharge the middle cavity of the valve. The main disadvantage is that after the plug is unscrewed from the valve body many times, the thread used for sealing will be damaged, resulting in unreliable sealing, short service life, time-consuming and labor-intensive; the other sewage valve uses PTFE When the temperature or pressure exceeds the applicable range of non-metal, that is, when the temperature exceeds 200°C or the medium pressure exceeds 15MPa, or there are many and large hard particles in the medium, it cannot be used, even if In the normal scope of application, the service life of this kind of sewage valve is relatively short, and the function of automatic sewage discharge cannot be realized.

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