Composite radiating disk bonnet cryogenic adjusting valve

Abstract

A composite radiating disk bonnet cryogenic adjusting valve comprises a main valve and a bonnet. An actuator is disposed on the bonnet. A valve element is disposed in the middle of the valve body of a main valve. A seal valve seat is disposed below the valve element. A sleeve cage is disposed on the periphery of the valve element. A valve rod is connected above the valve element. The upper section of the valve rod is matched with the seal filler in the stuffing box on the upper portion of the bonnet to extend out to be connected with the actuator component. The actuator drives the valve element to perform up-down linear travel movement. A composite radiating disk structure formed by a large-piece large-diameter radiating disk and a plurality circles of small-diameter radiating disks is disposed outside the bonnet, average temperature conductivity is increased, cold temperature on the periphery of the neck and convection radiating area and temperature differences of surrounding environments are increased, excellent radiating effects are achieved, freezing adhesion of the slide fit part of the valve rod and the filler can be avoided when the temperature is above 0 DEG C, reliable opening and closing and adjusting of the valve is guaranteed, the valve rod and the filler are prevented from being scratched by frozen hard objects, the overall strength of the bonnet and the valve are increased, cost is lowered, and economical benefits and reliability are increased.

Description

technical field [0001] The invention relates to a cryogenic regulating valve, in particular to a cryogenic regulating valve with a composite temperature-dissipating disc valve cover. Background technique [0002] Cryogenic regulating valves play a very important role in the automatic control of the process of modern liquefied natural gas, liquid oxygen, liquid hydrogen, liquid helium, etc. In this process control, it is necessary to open and close and adjust the circulation parameters of the medium according to the real-time data signal. Sensitivity, reliability, sealing and life between valve stem and packing are crucial for control action. Because the lower section of the valve stem in the bonnet of the cryogenic regulating valve is connected to the valve core, and the upper section cooperates with the sealing packing in the sealing box to extend out to connect with the actuator, the cryogenic medium in the space in the bonnet communicates with the valve body, and the val...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the bonnet of the cryogenic regulating valve adopts a single-piece large-diameter cooling plate and an extended bonnet top, but the radius of the single-piece cooling plate increases, and the closer to the periphery, the base surface of the cryogenic medium is transmitted. The smaller the temperature difference between the cold temperature and the ambient convection, that is to say, the lower the average thermal conductivity, the insufficient heat dissipation conditions, and the poorer effect; it is necessary to lengthen the top of the bonnet, but the cold temperature and the ambient temperature of the peripheral wall of the extended top The convection area is small, the heat dissipation conditions are not good enough, and the valve stem is too long, which will cause the instability of the vertically stressed pressure rod, seal leakage, and reduce the strength of the valve cover, while increasing the cost

Insufficient cooling conditions will cause the sliding joint between the valve stem and the packing to freeze and bond, resulting in loss of adjustment action or insensitivity, and hard objects that freeze will scratch the valve stem and packing. The service life of the cryogenic regulating valve is short and frequent replacement

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