a ball valve

Abstract

The invention relates to a ball valve, comprising a valve body and a valve ball. An installation chamber is provided at the upper end of the valve body, a connecting sleeve is arranged in the installation chamber, a connecting chamber is provided in the middle of the connecting sleeve, and the connecting chamber rotates A valve stem is provided, and the valve stem separates the connecting chamber into a first sealed chamber and a second sealed chamber that are not connected to each other. When the valve stem breaks, the first sealed chamber and the second sealed chamber Connected, and then the clamping block on the connecting sleeve is disengaged from the valve body, so that the connecting sleeve and the valve stem can be removed. The invention has the advantages that the broken valve stem is automatically ejected out of the valve body by the pressure in the ball valve, so that when the valve stem breaks, the replacement is quicker and more convenient, thereby saving maintenance time.

Description

technical field [0001] The invention relates to the field of valves, in particular to a ball valve. Background technique [0002] The existing ball valve mainly includes a valve body, a valve seat, a ball and a valve stem. The ball is placed in the inner cavity of the valve body. There is a flow channel in the ball that can communicate with the inner cavity of the valve body. The contact surface of the valve seat and the ball body is made of non-metallic plastic material. , can form a seal with the outer surface of the ball. The ball is driven by the valve stem and rotates 90 degrees around the axis of the ball valve. The ball and the valve seat cooperate to open and close the fluid. When the existing ball valve is used for a long time, due to oxidation corrosion or The rotation resistance of the valve ball is too large, and the valve stem may break. After the valve stem is broken, the valve stem will not be able to effectively control the opening and closing of the ball val...

AI Technical Summary

Problems solved by technology

[0002] The existing ball valve mainly includes a valve body, a valve seat, a ball and a valve stem. The ball is placed in the inner cavity of the valve body. There is a flow channel in the ball that can communicate with the inner cavity of the valve body. The contact surface of the valve seat and the ball body is made of non-metallic plastic material. , can form a seal with the outer surface of the ball. The ball is driven by the valve stem and rotates 90 degrees around the axis of the ball valve. The ball and the valve seat cooperate to open and close the fluid. When the existing ball valve is used for a long time, due to oxidation corrosion or The rotation resistance of the valve ball is too large, and the valve stem may break. After the valve stem is broken, the valve stem will not be able to effectively control the opening and closing of the ball valve. The current existing solution is usually to shut down the entire system. Take it off the pipeline and disassemble the ball valve for maintenance. This process is a lot of work, time-consuming and labor-intensive, and also affects the use of the entire system. It will also cause leakage of liquid in the pipeline and pollute the surrounding working environment; this invention is designed to solve the above problems

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