Adjusting stop valve

Abstract

The invention discloses an adjusting stop valve. The adjusting stop valve comprises a valve body, a valve base and a sealing assembly; a certain gap is arranged between the valve base and the valve body as well as between a sealing ring and a sealing assembly body, and therefore it is guaranteed that the valve base or the sealing ring has an enough floating space; and due to the double floating spaces, cooperation of sealing pairs achieves the ideal state that no leakage exists in two directions, and therefore the problem that according to a high temperature ultra-large-caliber valve, due to deformation of a valve body, sealing loses efficacy is solved. Supporting bases providing radial supporting for a transmission shaft are arranged into a C shape, and the first supporting base and the second supporting base are arranged in front of the valve body, the supporting bearing interval is substantially decreased, and therefore the bending moment borne by the transmission shaft is substantially decreased, and the problems that the transmission shaft is too large in bending moment and large in machining difficulty are solved; and due to the arrangement of an isolating base, the disassembling and assembling difficulty of a flat key is effectively lowered, and due to the structure, preventing the shaft from fleeing out, on the isolating base, the overall rigidity and the action reliability of a transmission assembly are greatly improved.

Description

technical field [0001] The invention relates to a valve, in particular to a regulating cut-off valve. Background technique [0002] For the super large diameter sleeve control valve used in high temperature conditions, due to the irregular deformation of the valve body under high temperature conditions, it will have some adverse effects on the sealing performance of the valve, resulting in the problem of sealing failure of the valve. At present, there is no particularly effective solution for the seal failure that occurs in this situation. [0003] In addition, due to the large caliber of the valve, if the traditional design method is adopted, the positioning of the transmission shaft will be large, which will lead to excessive bending moment and increase the difficulty of production and processing. Contents of the invention [0004] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a valve t...

AI Technical Summary

Problems solved by technology

[0002] For the super-large diameter sleeve control valve used in high temperature conditions, due to the irregular deformation of the valve body under high temperature conditions, it will have some adverse effects on the sealing performance of the valve, resulting in the problem of sealing failure of the valve

At present, there is no particularly effective solution to the seal failure that occurs in this case

[0003] In addition, due to the large caliber of the valve, if the traditional design method is adopted, the positioning of the drive shaft will be large, which will lead to excessive bending moment and increase the difficulty of production and processing.

Images