High-temperature-pressure-resistant double-direction rigidity seal rotary ball valve with pretension compensation movable valve seat

Abstract

The invention provides a high-temperature-pressure-resistant double-direction rigidity seal rotary ball valve with a pretension compensation movable valve seat, and the rotary ball valve comprises a valve body, a valve rod, a jacking rod and a valve clack. It is presumed that the center line of the valve body is arranged in the horizontal direction from left to right, the valve rod stretches into the valve body from top to bottom, and the valve rod is rotatably connected with the valve body through a sealing assembly; the jacking rod stretches into the valve body from bottom to top in the radial direction of the valve body, and the jacking rod is fixedly connected with the valve body; the lower end of the valve body is provided with a bottom cover and a sealing gasket, wherein the bottom cover and the sealing gasket are used for blocking the jacking rod; the center line of the valve rod and the center line of the jacking rod are overlapped; and the valve clack is arranged inside the valve body, the lower end of the valve rod is fixedly connected with the upper portion of the left side of the valve clack, the lower portion of the left side of the valve clack is rotatably connected on the jacking rod through a shaft sleeve, and a movable valve seat sealing structure is arranged between the right side portion of the valve clack and the circumferential inner wall of the right side of the valve body. According to the high-temperature-pressure-resistant double-direction rigidity seal rotary ball valve with the pretension compensation movable valve seat, the structure process is easy to achieve, the design is reasonable, the sealing effect is good, the adjustment is easy, the maintaining and changing are convenient, the rotary ball valve is of a novel structure, advantages of flap valves and advantages of ball valves are integrated, and the rotary ball valve is a pioneering and innovative novel valve.

Description

technical field [0001] The invention relates to a valve, in particular to a high temperature and high pressure bidirectional hard-seal rotary ball valve with a preload compensation movable valve seat. Background technique [0002] The rotary ball valve is a valve with a new structure developed in recent years. It is widely used in urban central heating and high-pressure steam pipelines to open, close or adjust the medium flow. At present, the structure of the rotary ball valve is only used for the flange structure. Due to the limitation of the baffle form of the fixed and movable valve seat, the baffle is fixed on the valve body with fastening screws and needs to be extended to the outside for a certain position, so the flange type The structure has this position to allow it to be used, resulting in the situation that rotary ball valves are only used on flanged valves in recent years. In addition, the auxiliary sealing form of the existing movable valve seat structure and t...

AI Technical Summary

Problems solved by technology

At present, the structure of the rotary ball valve is only used for the flange structure. Due to the limitation of the baffle form of the fixed and movable valve seat, the baffle is fixed on the valve body with fastening screws and needs to be extended to the outside for a certain position, so the flange type The structure has this position to allow it to be used, resulting in the situation that the rotary ball valve is only used on flanged valves in recent years.

In addition, the auxiliary sealing form of the existing movable valve seat structure and the pretightening force for moving compensation are all realized by the "O" type rubber ring, which cannot be used on high temperature and high pressure pipelines due to the temperature limit of the "O" type ring material. ;The welded connection form of valves is often used in pipeline connections, and is used in high-temperature and high-pressure pipelines. The current structural form is difficult to achieve because the welded valve has no flange, and the outer connection is equivalent to the pipe wall.

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