Ultra-temperature high-pressure stop valve

Abstract

The invention relates to an ultra-temperature high-pressure stop valve comprising a valve body, a valve cover, a valve rod, a valve clack, a valve seat and an operation mechanism, wherein, cooling channels are arranged in the valve rod and the valve clack. The invention is characterized in that at least two groups of sealing surfaces are arranged between the valve clack and the valve seat; the valve clack is provided with an annular notch separating adjacent sealing surfaces, and the two ends of the notch are stuck with the inner wall of a valve seat path to form an insulated tank. The invention has the following beneficial effects: a plurality of groups of sealing surfaces are arranged between the valve clack and the valve seat, and the insulated tank is arranged between two adjacent sealing surfaces; if an outer sealing surface leaks, medium enters the insulated tank but is blocked by the outer sealing surface, so that the heat quantity of medium entering the insulated tank is small; because the insulated tank is near the valve rod and the cooling path of the valve clack, the temperature of the medium entering the insulated tank can be quickly lowered, which effectively ensures that inner sealing surface can be free from being affected by high-temperature and high-pressure medium, and the whole sealing performance of the valve can be improved.

Description

technical field [0001] The invention relates to a valve, more specifically to an ultra-high temperature and high pressure cut-off valve, which is mainly used in various pipeline system projects. 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, ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems that the existing high-temperature and high-pressure globe valve adopts a single sealing form, which easily causes the sealing surface of the disc and the valve seat to deform and cause leakage under the erosion of high-temperature and high-pressure medium, the invention provides an ultra-high temperature and high pressure globe valve , with reasonable design and simple structure, it can effectively solve the leakage problem caused by the erosion of high temperature and high pressure medium; secondly, it can also solve the leakage caused by the annealing and softening of the material and reduce the corresponding production cost

Images