Metal lip-shaped sealing valve seat fixing ball valve

Abstract

A fixed ball valve with a metal lip-shaped sealing valve seat is characterized in that the valve seat is integrally formed by metal materials in a punching mode and comprises a mounting portion, a lip-shaped sealing portion and an elastic connecting portion, and the mounting portion is fixedly connected with a valve cover or a valve body; the lip-shaped sealing part is attached to the surface of the ball body; the elastic connecting part is connected with the mounting part and the lip-shaped sealing part and can provide elastic force for pressing the surface of the ball body for the lip-shaped sealing part. By the adoption of the scheme, reliable sealing between the valve seat and the ball is achieved through buckling deformation of the valve seat and thrust of a medium, and the valve seat is simple in structure, convenient to install, low in production and machining cost and capable of being applied to special working conditions such as high temperature and high pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a metal lip sealing valve seat fixed ball valve. Background Art

[0002] The valve seat of a conventional metal-sealed trunnion-mounted ball valve utilizes spring preload and medium pressure to push the valve seat and the ball to seal. However, under higher fluid pressure and temperature operating conditions, the valve seat needs to be clad or sprayed with carbide and matched with grinding. However, this special manufacturing process requirement significantly increases the manufacturing cost.

[0003] Therefore, there is an urgent need to develop a fixed ball valve that can not only adapt to high temperature and high pressure working conditions, but also has a low cost, is more economical, and has extremely strong sealing performance. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a metal lip sealing valve seat fixed ball valve.

[0005] The technical solution adopted by the utility model is: a metal lip sealing valve seat fixed ball valve, comprising:

[0006] Valve body;

[0007] Valve covers are arranged at both ends of the valve body;

[0008] A top cover, which is arranged at the upper end of the valve body;

[0009] a ball rotatably mounted inside the valve body;

[0010] A valve stem, one end of which is connected to the ball, and the other end of which extends out of the top cover and is connected to the operating part;

[0011] The valve seat is arranged on both sides of the ball and is in sealing cooperation with the ball;

[0012] The valve seat is formed by integral stamping of metal material, and comprises:

[0013] A mounting portion, which is fixedly connected to the valve cover or the valve body;

[0014] A lip seal portion that fits against the surface of the ball;

[0015] The elastic connecting portion connects the mounting portion and the lip sealing portion, and can provide the lip sealing portion with elastic force for pressing the surface of the ball.

[0016] A limiting ring is also provided in the valve body, and the limiting ring cooperates with the elastic connecting part in limiting position.

[0017] The elastic connecting portion is in an arc-shaped structure.

[0018] A clamping boss is formed on the end surface of the valve cover facing one end of the valve body, and the valve body and the clamping boss of the valve cover fix the clamping mounting portion.

[0019] The outer ring of the clamping boss is provided with a first sealing gasket which is sealed with the mounting portion.

[0020] A second sealing gasket is arranged between the valve body and the valve cover.

[0021] The valve body is provided with a lower support shaft for supporting the ball, and the lower end of the lower support shaft is provided with an adjusting bolt matched with the valve body thread.

[0022] A bottom cover is provided at the bottom of the valve body, and a spring is provided between the bottom cover and the adjusting bolt.

[0023] A third sealing gasket is provided between the bottom cover and the valve body.

[0024] A fourth sealing gasket is provided between the top cover and the valve body.

[0025] The beneficial effect of the utility model is that: by adopting the above scheme, the warping deformation of the valve seat itself and the thrust of the medium are utilized to achieve reliable sealing between the valve seat and the ball. It is not only simple in structure, easy to install, and has low production and processing costs, but also can adapt to applications in special working conditions such as high temperature and high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a metal lip sealing valve seat fixed ball valve according to an embodiment of the utility model.

[0027] Figure 2 for Figure 1 A magnified schematic diagram of center A. DETAILED DESCRIPTION

[0028] The embodiments of the utility model are further described below in conjunction with the accompanying drawings.

[0029] As shown in the figure, a metal lip sealing valve seat fixed ball valve includes a valve body 1, a valve cover 2, a top cover 3, a ball 4, a valve stem 5, and a valve seat 6.

[0030] Two valve covers 2 are provided and are respectively installed at both ends of the valve body 1. The valve covers 2 and the valve body 1 are fixed and locked by screws, and a second sealing gasket 9 is provided between the valve body 1 and the valve cover 2 to ensure a reliable seal therebetween.

[0031] The top cover 3 is installed on the upper end of the valve body 1 , and the top cover 3 and the valve body 1 are fixed and locked by screws. A fourth sealing gasket 15 is provided between the top cover 3 and the valve body 1 to ensure reliable sealing between the two.

[0032] The valve body 1 is provided with a lower support shaft 10 for supporting the ball 4. The ball 4 is installed inside the valve body 1 and rotatably installed on the lower support shaft 10. A shaft sleeve and an anti-wear gasket are provided between the ball and the lower support shaft 10 to reduce friction and wear and increase service life.

[0033] One end of the valve stem 5 is connected to the ball 4, and the other end extends out of the top cover 3 and is connected to the operating component, which is specifically a handle. There is a packing between the valve stem 5 and the top cover 3, and the packing ensures a reliable seal between the valve stem 5 and the top cover 3. A shaft sleeve and an anti-wear gasket are provided between the valve stem 5 and the valve body, which not only ensures the stability of the valve stem 5 structure, but also reduces friction and wear, and increases the service life.

[0034] There are two valve seats 6 , which are respectively mounted on both sides of the sphere 4 . The valve seats 6 are integrally stamped from metal material and include a mounting portion 61 , a lip sealing portion 62 and an elastic connecting portion 63 .

[0035] The mounting portion 61 is used to be fixedly connected to the valve cover 2 or the valve body 1. A clamping boss 21 is formed on the end surface of the valve cover 2 facing the valve body 1, and the mounting portion 61 is fixedly clamped by the valve body 1 and the clamping boss 21 of the valve cover 2. The outer ring of the clamping boss 21 is provided with a first sealing gasket 8 that seals with the mounting portion 61 to ensure reliable sealing between the mounting portion 61 and the valve cover 2.

[0036] The lip seal portion 62 fits the surface of the ball 4 , and the elastic connection portion 63 is in an arc-shaped structure and connects the mounting portion 61 and the lip seal portion 62 , and can provide the lip seal portion 62 with an elastic force to press the surface of the ball 4 .

[0037] The valve seat 6 utilizes its own warping deformation and the thrust of the medium to achieve reliable sealing with the ball, which is not only simple in structure, easy to install, and low in production and processing cost, but also adaptable to applications under special working conditions such as high temperature and high pressure.

[0038] In addition, a limiting ring 7 is provided in the valve body 1, and the limiting ring 7 cooperates with the elastic connecting portion 63 to limit the valve seat, thereby preventing the valve seat from being disengaged from the fixed position due to excessive medium pressure.

[0039] The lower end of the lower support shaft 10 is also provided with an adjusting bolt 11 which is threadedly matched with the valve body 1. The upper and lower positions of the ball 4 can be fine-tuned by adjusting the bolt 11 so that it can better form a sealing fit with the lip sealing portion of the valve seat to improve the sealing performance.

[0040] Furthermore, a bottom cover 12 is provided at the bottom of the valve body 1, and a spring 13 is provided between the bottom cover 12 and the adjusting bolt 11. The spring 13 presses the adjusting bolt 11 to prevent the adjusting bolt 11 from loosening. At the same time, a third sealing gasket 14 is provided between the bottom cover 12 and the valve body 1 to further ensure reliable sealing of the bottom of the valve body.

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0043] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept of the utility model is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent right.

Claims

1. A metal lip sealing seat fixed ball valve, comprising: Valve body (1); Valve covers (2) are arranged at both ends of the valve body (1); A top cover (3) disposed on the upper end of the valve body (1); A ball (4) rotatably mounted inside the valve body (1); A valve stem (5), one end of which is connected to the ball (4), and the other end of which extends out of the top cover (3) and is connected to the operating component; Valve seats (6) are arranged on both sides of the ball (4) and are in sealing cooperation with the ball (4); The feature is that the valve seat (6) is made of metal material and is integrally stamped and formed, and comprises: A mounting portion (61) fixedly connected to the valve cover (2) or the valve body (1); A lip-shaped sealing portion (62) which fits the surface of the ball (4); The elastic connection portion (63) connects the mounting portion (61) and the lip-shaped sealing portion (62), and can provide the lip-shaped sealing portion (62) with an elastic force for pressing the surface of the ball (4).

2. The metal lip sealing seat fixed ball valve according to claim 1, characterized in that: A limiting ring (7) is also provided in the valve body (1), and the limiting ring (7) cooperates with the elastic connecting portion (63) in limiting manner.

3. The metal lip sealing seat fixed ball valve according to claim 1, characterized in that: The elastic connecting portion (63) has an arc-shaped structure.

4. The metal lip sealing seat fixed ball valve according to claim 1, characterized in that: A clamping boss (21) is formed on an end surface of the valve cover (2) facing the valve body (1), and the valve body (1) and the clamping boss (21) of the valve cover (2) are fixedly clamped to the mounting portion (61).

5. The metal lip sealing seat fixed ball valve according to claim 4, characterized in that: The outer ring of the pressing boss (21) is provided with a first sealing gasket (8) which seals with the mounting portion (61).

6. The metal lip sealing seat fixed ball valve according to claim 4, characterized in that: A second sealing gasket (9) is provided between the valve body (1) and the valve cover (2).

7. The metal lip sealing seat fixed ball valve according to claim 1, characterized in that: A lower support shaft (10) for supporting the ball (4) is provided in the valve body (1), and an adjusting bolt (11) threadably matched with the valve body (1) is provided at the lower end of the lower support shaft (10).

8. The metal lip sealing seat fixed ball valve according to claim 7, characterized in that: A bottom cover (12) is provided at the bottom of the valve body (1), and a spring (13) is provided between the bottom cover (12) and the adjusting bolt (11).

9. The metal lip sealing seat fixed ball valve according to claim 8, characterized in that: A third sealing gasket (14) is provided between the bottom cover (12) and the valve body (1).

10. The metal lip sealing seat fixed ball valve according to claim 7, characterized in that: A fourth sealing gasket (15) is provided between the top cover (3) and the valve body (1).

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