Ball valve with valve seat convenient to replace

Abstract

The utility model relates to the technical field of ball valves, in particular to a ball valve with a valve seat convenient to replace, which comprises a valve body and a left body, the valve seat is fixed inside the valve body, the inner side wall of the valve seat is in contact with the outer side wall of a ball body, a threaded hole is arranged on the side wall of the left body, and the valve seat comprises a valve ring, a connecting plate fixed on the outer side of the valve ring and a locking bolt. The connecting plate is fixed in the threaded hole through the locking bolt, the top end of the ball body is fixedly connected with the valve rod, the packing and the packing gland are fixed to the outer side of the valve rod, and the handle is arranged on the outer side of the top end of the valve rod in a sleeving mode. And secondly, the possibility is provided for quick disassembly and assembly of the valve seat and the internal structure of the valve seat, so that in the valve body and the left body, after the left body is disassembled, the valve seat or the ball body structure can be directly replaced, and compared with an existing structure, the device has the advantage that the internal valve seat structure can be replaced more quickly.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to a ball valve with an easy-to-replace valve seat. Background Technology

[0002] Floating ball valves are widely used in critical locations in process pipelines such as oil pipelines and nuclear power systems, where they provide a safe shut-off function through forced sealing. Most applications of floating ball valves require in-line maintenance and seat replacement.

[0003] Currently, floating ball valves on the market are generally two-piece or three-piece valve bodies. The valve seat is usually replaced by disassembling the valve body. However, disassembling the valve body requires first removing the floating ball valve from the pipeline, which is time-consuming and labor-intensive, and online maintenance and replacement of the valve seat cannot be achieved. Utility Model Content

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a ball valve with easy-to-replace valve seat, which can effectively solve the problems in the prior art.

[0006] Technical solution

[0007] This utility model provides a ball valve with an easy-to-replace valve seat, including a valve body and a left body. A valve seat is fixed inside the valve body, and the inner side wall of the valve seat is in contact with the outer side wall of the ball. A threaded hole is provided on the side wall of the left body. The valve seat includes a valve ring, a connecting plate fixed to the outside of the valve ring, and a locking bolt. The connecting plate is fixed in the threaded hole by the locking bolt. The top of the ball is fixedly connected to the valve stem. A packing and a packing gland are fixed to the outside of the valve stem. A handle is sleeved on the outside of the top of the valve stem.

[0008] Furthermore, the valve body and the left body are connected by bolts and nuts, and a metal spiral wound gasket is fitted between the left body and the valve body.

[0009] Furthermore, a limiting piece is fixed to the inner side of the handle, and the top of the handle is fixedly connected to the valve stem by an external hexagonal bolt.

[0010] Furthermore, the valve ring has a concave structure, and the connecting plate is fixed to the outside of the valve ring. The outside of the connecting plate has a square structure. Two sets of threaded holes are provided on one side of the connecting plate, and locking bolts are provided in both sets of threaded holes. Locking nuts are sleeved on the outside of the locking bolts.

[0011] Furthermore, the inner wall of the valve ring remains in contact with the outer wall surface of the ball.

[0012] Beneficial effects

[0013] This utility model, through its combined structure of valve body and left body, allows users to connect the two structures using nuts and bolts during actual operation. This facilitates the connection and provides the possibility for quick disassembly and assembly of the valve seat and its internal structure. Therefore, after removing the left body, the valve seat or ball structure can be directly replaced. Compared with existing structures, this device allows for faster replacement of the internal valve seat structure.

[0014] In this device, by setting a valve ring structure with a connecting plate, the user can fix it to the valve body by fixing it with bolts in the threaded hole to achieve a combined connection. Then, the ball is placed in the valve seat to combine the valve body and the left plate, which facilitates the combination and connection of the internal valve seat. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the valve seat in this utility model;

[0019] Figure 4 This is a schematic diagram of the valve seat in this utility model.

[0020] The labels in the diagram represent: 1. Valve body; 2. Valve seat; 21. Valve ring; 22. Connecting plate; 23. Locking bolt; 3. Ball; 4. Metal spiral wound gasket; 5. Left body; 6. Bolt; 7. Nut; 8. Valve stem; 9. Packing; 10. Packing gland; 11. Limiting plate; 12. Handle; 13. External hex bolt; 14. Threaded hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example: A ball valve with an easy-to-replace valve seat, see attached figure. Figure 1 - Appendix Figure 4 The device includes a valve body 1 and a left body 5. A valve seat 2 is fixed inside the valve body 1. The inner side wall of the valve seat 2 is in contact with the outer side wall of the ball 3. A threaded hole 14 is provided on the side wall of the left body 5. The valve seat 2 includes a valve ring 21, a connecting plate 22 fixed to the outside of the valve ring 21, and a locking bolt 23. The connecting plate 22 is fixed in the threaded hole 14 by the locking bolt 23. The top end of the ball 3 is fixedly connected to the valve stem 8. The outer side of the valve stem 8 is fixed with packing 9 and packing gland 10. A handle 12 is sleeved on the outer side of the top end of the valve stem 8. In this device, by setting the valve ring 21 structure with the connecting plate 22, the user can fix it in the threaded hole 14 with bolts 6 to connect and fix it with the valve body 1, and then place the ball 3 in the valve seat 2 to combine and connect the valve body 1 and the left plate, which facilitates the combination and connection of the internal valve seat 2.

[0024] The valve body 1 and the left body 5 are connected by bolts 6 and nuts 7, and a metal spiral wound gasket 4 is fitted between the left body 5 and the valve body 1; a limit plate 11 is fixed to the inner side of the handle 12, and the top of the handle 12 is fixed to the valve stem 8 by an external hexagonal bolt 13; the valve ring 21 has a concave structure, and the connecting plate 22 is fixed to the outer side of the valve ring 21, and the outer side of the connecting plate 22 has a square structure. Two sets of threaded holes 14 are opened on one side of the connecting plate 22, and locking bolts 23 are provided in both sets of threaded holes 14. A locking nut is fitted on the outer side of the locking bolt 23; the inner wall of the valve ring 21 is in contact with the outer wall surface of the ball 3; through the combined structure of the valve body 1 and the left body 5, in actual operation, the user can combine and connect the two structures using the nut 7 and the bolt 6. This facilitates the combination and connection, and provides the possibility for quick disassembly and assembly of the valve seat 2 and its internal structure. Therefore, after removing the left body 5, the valve seat 2 or the ball 3 structure can be directly replaced. Compared with the existing structure, this device can replace the internal valve seat 2 structure more quickly.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ball valve facilitating replacement of a valve seat, characterized by The valve includes a valve body (1) and a left body (5). A valve seat (2) is fixed inside the valve body (1). The inner wall of the valve seat (2) is in contact with the outer wall of the ball (3). A threaded hole (14) is provided on the side wall of the left body (5). The valve seat (2) includes a valve ring (21), a connecting plate (22) fixed to the outside of the valve ring (21), and a locking bolt (23). The connecting plate (22) is fixed in the threaded hole (14) by the locking bolt (23). The top of the ball (3) is fixedly connected to the valve stem (8). The outer side of the valve stem (8) is fixed with packing (9) and packing gland (10). A handle (12) is sleeved on the outer side of the top of the valve stem (8).

2. A ball valve with easy-to-replace valve seat according to claim 1, characterized in that The valve body (1) and the left body (5) are connected by bolts (6) and nuts (7), and a metal spiral wound gasket (4) is fitted between the left body (5) and the valve body (1).

3. The ball valve of claim 1, wherein, A limiting piece (11) is fixed to the inner side of the handle (12), and the top of the handle (12) is fixedly connected to the valve stem (8) by an external hexagonal bolt (13).

4. The ball valve of claim 1, wherein, The valve ring (21) has a concave structure, and the connecting plate (22) is fixed to the outside of the valve ring (21). The outside of the connecting plate (22) is a square structure. Two sets of threaded holes (14) are provided on one side of the connecting plate (22), and locking bolts (23) are provided in both sets of threaded holes (14). Locking nuts are sleeved on the outside of the locking bolts (23).

5. A ball valve facilitating replacement of the valve seat according to claim 4, characterized in that The inner wall of the valve ring (21) is in contact with the outer wall surface of the ball (3).

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