Superhigh-temperature and high-pressure check valve

Abstract

The invention discloses a superhigh-temperature and high-pressure check valve. The superhigh-temperature and high-pressure check valve comprises a valve body. The upper end of the valve body is provided with a fixed block. A valve rod penetrates through the fixed block. The upper end of the valve rod is provided with a turning wheel. The lower end of the valve rod is provided with a mounting block. A device cavity is formed in the middle of the mounting block. A guide rod is arranged in the device cavity. The guide rod is sleeved with two movable plates. The sidewalls of the two movable platesare both provided with insertion rods. The two insertion rods penetrate through the inner wall of the device cavity. Two round cavities are formed in the sidewall of the mounting block. The two roundcavities are located on the two sides of the device cavity. The inner walls of the two round cavities are both provided with sliding cavities which communicate with the device cavity. The inner wallsof the round cavities are fixedly connected with the fixed block. The superhigh-temperature and high-pressure check valve is reasonable in structure design and easy to operate. The service life of the superhigh-temperature and high-pressure check valve is greatly prolonged by adopting a replaceable valve clack. Meanwhile, the enterprise cost is lowered.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an ultra-high temperature and high pressure stop valve. Background technique [0002] The existing high temperature and high pressure globe valve mainly includes a valve body, a valve cover, a valve stem, a valve disc and an operating mechanism, etc., the valve disc is placed in the cavity of the valve body, and one end of the valve rod is fixed to the valve disc The other end is connected with the operating mechanism; in order to ensure the sealing performance, most of the existing valve discs adopt a conical structure and form a single seal by fitting it with the valve seat. With this structure, it can be effectively applied to ordinary globe valves. Guarantee its sealing performance, but in the high temperature and high pressure globe valve, because the valve disc is eroded by high temperature and high pressure medium for a long time, the cone-shaped single sealing form is adop...

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Problems solved by technology

[0002] The existing high temperature and high pressure globe valve mainly includes a valve body, a valve cover, a valve stem, a valve disc and an operating mechanism, etc., the valve disc is placed in the cavity of the valve body, and one end of the valve rod is fixed to the valve disc The other end is connected with the operating mechanism; in order to ensure the sealing performance, most of the existing valve discs adopt a conical structure and form a single seal by fitting it with the valve seat. With this structure, it can be effectively applied to ordinary globe valves. Guarantee its sealing performance, but in the high temperature and high pressure globe valve, because the valve disc is eroded by high temperature and high pressure medium for a long time, the cone-shaped single sealing form is adopted, and under the erosion of high temperature and high pressure medium, it is easy to cause deformation of the valve disc and valve seat Second, because the valve disc is eroded by high-temperature and high-pressure medium for a long time, there are high requirements for the corrosion resistance and hardness of the valve disc. If it is made of ordinary steel, it cannot meet the technical requirements, and it is easy to cause annealing and softening of the valve disc. , which also causes leakage; and if all of them are made of high-hardness nickel alloy materials, the production cost is high and the processing efficiency is low, which is not conducive to processing. The existing valve stem and valve disc are integrally formed, and often the whole shut-off valves to be replaced, resulting in wasted

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