Top Entry Ball Valve
A top-mounted, ball valve technology, applied in the direction of valve devices, cocks including cut-off devices, engine components, etc., can solve the problems of short life, poor sealing reliability, etc., and achieve the effect of prolonging service life and two-way reliable sealing effect
Active Publication Date: 2017-11-14
NEWAY VALVE SUZHOU
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Problems solved by technology
[0006] For this reason, the technical problem to be solved by the present invention is that in the prior art, the ball valve capable of realizing bidirectional sealing has a short service life and poor sealing reliability due to the movement of the sealing element, while the valve seat assembly structure capable of realizing the fixed sealing element can only realize unidirectional sealing Therefore, by rationally designing the structure of the valve seat assembly, a ball valve that can prevent the seal from moving and achieve bidirectional reliable sealing can be provided.
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Embodiment Construction
[0032] like Figure 4-Figure 6 Shown is a top-mounted ball valve of the present invention, including a valve seat 3 located between the ball 1 and the valve body 2, the valve seat 3 and the ball 1 are sealed and connected by a sealing material 4, and the valve seat 3 and the valve body 2 are connected by a seal 5 sealed connection, and also includes a spring assembly 6 located between the valve body 2 and the valve seat 3, one end of the spring assembly 6 leans against the valve body 2, a first step 21 is formed on the valve body 2, and the seal 5 is located on the second In the sealing gap formed by the shoulder 211 of a step 21 and the radial end surface of the spring assembly 6, one end of the seal 5 abuts against the shoulder 211 of the first step 21, and the other end abuts against the radial direction of the spring assembly 6. On the end surface; on the outer peripheral surface of the valve seat 3, a limiting member 7 is provided, and the radial end surface of the limiti...
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The invention relates to a top-mounted ball valve which comprises a valve seat between a ball body and a valve body, and a spring assembly between the valve body and the valve seat, wherein the valve seat is hermetically connected with the ball body through a sealing material and hermetically connected with the valve body through a sealing piece; one end of the spring assembly abuts on the valve body; a first step is formed in the valve body; the sealing piece is arranged in a sealing gap formed by the shoulder of the first step and the radial end surface of the spring assembly; one end of the sealing piece abuts to the shoulder of the first step, and the other end of the sealing piece abuts on the radial end surface of the spring assembly, so that the sealing piece cannot be moved; a limiting piece is arranged on the outer circumferential surface of the valve seat, the radial end surface of the limiting piece abuts with the other end of the spring assembly, and the limiting piece is used for limiting the spring assembly.
Description
technical field [0001] The invention relates to the technical field of valve manufacturing, in particular to a top-mounted ball valve. Background technique [0002] Ball valve has become one of the most widely used valves due to its reliable sealing, simple structure and convenient maintenance. Compared with the side-entry ball valve, the top-entry ball valve has the advantages of fewer external leakage points and less influence of pipeline stress on it. At the same time, the top-entry ball valve is widely used because it can realize convenient online maintenance. Among the top-entry ball valves, DBB and DIB are two types of seat functions. Among them, the DBB seat is also called a single-piston effect seat. Each seat can resist the force in one direction and discharge the middle cavity. DIB valve seat is divided into DIB-1 valve seat and DIB-2 valve seat. Each valve seat of DIB-1 valve seat resists two directions of force, which is called double piston effect valve seat, b...
Claims
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IPC IPC(8): F16K5/20
CPCF16K5/0663F16K5/201
Inventor 徐涌丁城王国军王建华
Owner NEWAY VALVE SUZHOU