Ultrahigh-pressure exhaust valve

Abstract

The invention relates to an ultrahigh-pressure exhaust valve comprising a main valve and a trace exhaust valve group. The lower end of the main valve communicates with a pipeline, the main valve is used for achieving large-amount low-pressure exhaust and large-amount air suction, and the main valve comprises a main valve body, a main valve deck installed on the top of the main valve body and provided with a first exhaust hole, a main valve floating ball assembly installed in the main valve body and a throttling exhaust assembly installed on the upper portion of the main valve deck. The trace exhaust valve group is connected with the main valve and is used for achieving high-pressure automatic exhaust. The trace exhaust valve group comprises a trace exhaust valve group valve body, a trace exhaust valve group valve deck, a sealing base and a floating ball lever assembly. The bottom of the trace exhaust valve group valve body communicates with the lower part of the main valve body, and the upper part of the trace exhaust valve group valve body is fixedly connected with the main valve body. The trace exhaust valve group valve deck is arranged on the top of the trace exhaust valve group valve body. The sealing base is arranged on the trace exhaust valve group valve deck and is used for achieving trace exhaust. The floating ball lever assembly is fixed to the trace exhaust valve group valve deck and is used for achieving opening and closing of the sealing base. Compared with the prior art, the ultrahigh-pressure exhaust valve has the advantages of being high in strength, good in sealing performance, capable of preventing overcompression and capable of achieving rapid and stable opening through the eccentric fit lever principle.

Description

technical field [0001] The invention relates to the technical field of water pipeline exhaust valves, in particular to an ultra-high pressure exhaust valve. Background technique [0002] At present, on domestic water pipelines, the pressure rating of the exhaust valve products actually used is usually only below PN26, and very few can reach PN40, but there are almost no exhaust valves with a pressure rating of PN63 and above. Moreover, in high-altitude areas, especially the Yunnan-Guizhou-Sichuan and Qinghai plateau areas, due to the high local altitude and long water pipelines, a high drop is formed, so the pipeline pressure is generally high. On pipelines with a pressure rating exceeding PN63, currently There is no available exhaust valve, and only a ball valve can be installed to manually exhaust. Manual exhaust not only greatly increases labor costs, but also cannot discharge the gas in the pipeline in a timely and frequent manner, which affects the efficiency of water d...

AI Technical Summary

Problems solved by technology

[0004] 1. When the buoyancy is guaranteed, the volume of the traditional stainless steel floating ball increases, and the rigidity of the external pressure is not enough, which is easy to cause instability and damage; if the rigidity is ensured, the wall thickness becomes thicker and the weight increases; this creates a contradiction that is not conducive to the design. more difficult to resolve;

[0005] 2. The main seal under high pressure adopts conventional rubber seal, which is easy to cause excessive compression of rubber under high pressure, resulting in damage to the seal and invalidation of the seal;

[0006] 3. The seal of the micro-exhaust valve group is sucked due to the ultra-high pressure and it is difficult to open it again when exhaust is required

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