Sealing connection structure of floating ball valve

Abstract

A sealing connection structure of a floating ball valve comprises a water inlet connector which is arranged on a valve body part and provided with external threads, a nut which is connected to the water inlet connector in a screwed manner and a sealing gasket which is connected to the water inlet connector in a sleeving manner and located between a sealing face of the valve body part and the nut.The sealing connection structure is characterized in that an inner annular flange and an outer annular flange are arranged along the edge of the face, back on to the sealing face of the valve body part, of the sealing gasket and the edge of a through hole correspondingly, and a plurality of flanges distributed in a radial manner are arranged between the inner annular flange and the outer annular flange. Compared with the prior art, the sealing connection structure has the advantage that the relative movement between the sealing face of the valve body part and the sealing gasket can be prevented.

Description

technical field [0001] The present invention relates to a valve technology. Background technique [0002] The existing float valve installed on the water tank that supplies water to the steam generator, its connection structure with the water tank includes a water inlet joint with an external thread arranged on the valve body, a nut screwed on the water inlet joint, a sleeve The sealing gasket connected to the water inlet joint and located between the sealing surface of the valve body and the nut. When in use, the water inlet joint sleeved with the sealing gasket passes through the side wall of the water tank from the inside of the water tank, and the nut is screwed from the outside of the water tank to the inlet. On the water joint, make the sealing surface of the valve body part close to the inner wall of the water tank through the gasket and seal it through the gasket. This kind of sealing connection structure, in the process of rotating the nut so that the sealing surfa...

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Problems solved by technology

This kind of sealing connection structure, in the process of rotating the nut so that the sealing surface of the valve body part is pressed by the nut, will inevitably drive the valve body part to rotate through the water inlet joint, even if a wrench is used to block the valve body part to prevent it The rotating installation method cannot avoid the small rotation of the valve body part. Because the force exerted by the wrench on the nut will generate torque, the sealing surface of the valve body part is not evenly pressed on the gasket, resulting in a certain edge of the sealing surface. The force pressing on the gasket increases a lot, while most other forces pressing on the gasket decrease. At the same time, between the gasket and the side wall of the water tank, in addition to the friction force generated by the force exerted by the valve body, there is also a sealing gasket. Close to the smooth side wall of the water tank (because the water tank is usually made of stainless steel plate, so the inner side wall of the water tank has a smooth surface), the friction force formed by the pressure of the atmosphere, when the resultant force of the two friction forces is greater than that of the valve body When there is friction between the sealing surface and the gasket, the relative movement between the sealing surface of the valve body and the gasket occurs, and the force of a certain edge of the sealing surface pressing on the gasket increases, causing the gasket to be torn and cracked, resulting in It loses its sealing effect

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