Welding ball valve with welding port preventing welding deformation

Abstract

The utility model discloses a welding ball valve of welding mouth prevents welding deformation, it includes left valve body, right valve body, main valve seat, deputy valve seat, valve ball and heat radiation structure, and valve ball is rotatablely located inside right valve body, and one end of left valve body has welding end, and the other end of left valve body is connected in right valve body, and main valve seat and deputy valve seat all are located inside right valve body, and main valve seat is pressed between left valve body and one end of valve ball, and deputy valve seat is pressed between right valve body and the other end of valve ball, and heat radiation structure is set between welding end and main valve seat, and one end of heat radiation structure is connected to the outer surface of left valve body, and the other end of heat radiation structure extends outward and protrudes. Through heat radiation structure can be active from the welding heat of welding end and thus effectively blocked the heat transfer path, and the root cause of the problem of sealing failure caused by welding is solved. At the same time, the manufacturing cost increases little, but the benefit is huge, and the fault tolerance is stronger, and the application range is wider, and the structure is simple, and easy to realize.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to a welded ball valve that prevents welding deformation at the weld joint. Background Technology

[0002] Welded ball valves are widely used in harsh operating conditions due to their reliable connections and good sealing performance. However, during the on-site welding process between the valve and the pipeline, a significant amount of concentrated heat is generated at the weld joint. This heat is conducted along the valve body, and in particular, it directly affects the main valve seat located inside the valve body.

[0003] In traditional welded ball valves, the main valve seat is usually in direct or indirect contact with the valve body. The input of welding heat can easily cause the main valve seat to expand and deform due to heat. Once deformed, the geometric accuracy of the valve's main sealing surface (i.e., the contact surface between the valve ball and the main valve seat) will be compromised, leading to internal leakage and sealing failure after welding, causing significant safety hazards and economic losses. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings of existing products. This invention provides a welded ball valve that prevents welding deformation at the weld joint.

[0005] This utility model is achieved through the following technical solution:

[0006] A welded ball valve for preventing weld deformation at the weld joint includes a left valve body, a right valve body, a main valve seat, a secondary valve seat, a valve ball, and a heat dissipation structure. The valve ball is rotatably located inside the right valve body. One end of the left valve body has a welded end, and the other end of the left valve body is connected to the right valve body. The main valve seat and the secondary valve seat are both located inside the right valve body, with the main valve seat pressed between one end of the left valve body and the valve ball, and the secondary valve seat pressed between the other end of the right valve body and the valve ball. The heat dissipation structure is disposed between the welded end and the main valve seat, with one end of the heat dissipation structure connected to the outer surface of the left valve body, and the other end of the heat dissipation structure extending outward and protruding.

[0007] Furthermore, the distance between the heat dissipation structure and the welding end is less than the distance between the heat dissipation structure and the main valve seat.

[0008] Furthermore, the heat dissipation structure includes a heat sink, which is sleeved around the outer surface of the left valve body.

[0009] Furthermore, the thermal conductivity of the heat sink is higher than that of the left valve body.

[0010] Furthermore, the number of heat sinks is one;

[0011] Alternatively, there may be multiple heat sinks, which are spaced apart on the outer surface of the left valve body.

[0012] Furthermore, the outer surface of the left valve body has a surrounding recessed groove, into which the heat sink is embedded.

[0013] Furthermore, the left valve body and the heat sink are integrally formed.

[0014] Furthermore, the weld ball valve for preventing welding deformation at the weld joint also includes a metal sealing ring, which is disposed on the outer surface of the main valve seat and between the left valve body and the right valve body.

[0015] Furthermore, the weld ball valve for preventing weld deformation at the weld joint also includes a disc spring, which is pressed between the secondary valve seat and the right valve body.

[0016] Furthermore, the weld ball valve for preventing weld deformation at the weld joint also includes a valve stem, packing, and a gland. The valve stem is rotatably embedded in the right valve body and connected to the top of the valve ball. The packing is pressed between the outer surface of the valve stem and the right valve body. The gland is connected to the top of the right valve body, and the bottom of the gland is pressed against the top of the packing.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model discloses a welded ball valve designed to prevent welding deformation at the weld joint. By incorporating a heat dissipation structure between the weld end and the main valve seat, this structure actively dissipates welding heat from the weld end, effectively blocking the heat transfer path and ensuring that the main valve seat experiences almost no temperature rise or deformation during welding. This structurally eliminates the problem of sealing failure caused by welding. Furthermore, the heat dissipation structure is located on the outer surface of the left valve body, requiring no changes to the valve's main structure or assembly process. This results in minimal increase in manufacturing costs but significant benefits, enhanced fault tolerance, and a wider range of applications. Moreover, the structure is simple and easy to implement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of a welded ball valve for preventing welding deformation at the weld joint, according to an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] Right valve body 1

[0022] Left valve body 2

[0023] Welding end 21

[0024] Valve ball 3

[0025] Main valve seat 4

[0026] Subsidiary valve seat 5

[0027] Heat dissipation structure 6

[0028] Heatsink 61

[0029] Valve stem 7

[0030] Pressure cap 8

[0031] Packing material 9

[0032] Metal sealing ring 10

[0033] Disc Spring 11

[0034] Inverted seal bearing 12 Detailed Implementation

[0035] The following description of the embodiments is with reference to the accompanying drawings, which illustrate specific embodiments in which the present invention can be implemented.

[0036] like Figure 1 As shown, this embodiment discloses a welded ball valve for preventing weld deformation at the weld joint. The welded ball valve for preventing weld deformation includes a right valve body 1, a left valve body 2, a valve ball 3, a main valve seat 4, a secondary valve seat 5, and a heat dissipation structure 6. The valve ball 3 is rotatably located inside the right valve body 1. One end of the left valve body 2 has a welded end 21, and the other end of the left valve body 2 is connected to the right valve body 1. The main valve seat 4 and the secondary valve seat 5 are both located inside the right valve body 1. The main valve seat 4 is pressed between one end of the left valve body 2 and the valve ball 3, and the secondary valve seat 5 is pressed between the other end of the right valve body 1 and the valve ball 3. The heat dissipation structure 6 is disposed between the welded end 21 and the main valve seat 4. One end of the heat dissipation structure 6 is connected to the outer surface of the left valve body 2, and the other end of the heat dissipation structure 6 extends outward and protrudes.

[0037] The left valve body 2 is connected to the right valve body 1, forming a channel through which the internal medium or air flows. When the welded end 21 of the left valve body 2 is heated, the heat dissipation structure 6 actively and quickly absorbs and conducts away most of the incoming heat, dissipating it into the internal medium or air of the left valve body 2. This creates a thermal barrier, significantly reducing the heat transferred to the main valve seat 4 and keeping the temperature rise in the main valve seat 4 area within an extremely low range, fundamentally preventing deformation caused by uneven thermal expansion. By setting the heat dissipation structure 6 between the welded end 21 and the main valve seat 4, the heat dissipation structure 6 can actively dissipate the welding heat from the welded end 21, rather than passively bearing it, thus effectively blocking the heat transfer path and ensuring that the main valve seat 4 experiences almost no temperature rise or deformation during welding, structurally eliminating the sealing failure problem caused by welding. Meanwhile, one end of the heat dissipation structure 6 is connected to the outer surface of the left valve body 2, and the other end of the heat dissipation structure 6 extends outward and protrudes. The heat dissipation structure 6 is set on the outer surface of the left valve body 2 without changing the valve body structure and assembly process. The manufacturing cost increases very little, but the benefits are huge. It reduces the dependence on the technical level of on-site welding operators and high-precision welding processes, has stronger fault tolerance, and a wider range of applications. Moreover, the structure is simple and easy to implement.

[0038] In this embodiment, the distance between the heat dissipation structure 6 and the welding end 21 is less than the distance between the heat dissipation structure 6 and the main valve seat 4. That is, the heat dissipation structure 6 is located near the welding end 21 of the left valve body 2 and far away from the main valve seat 4, which can effectively block the heat transfer path and ensure that the main valve seat 4 hardly experiences temperature rise and deformation during the welding process, thus fundamentally solving the sealing failure problem caused by welding.

[0039] In this embodiment, the heat dissipation structure 6 includes a heat sink 61, which is sleeved around the outer surface of the left valve body 2. The heat sink 61 has a sheet-like structure and is disposed on the outer surface of the left valve body 2, which is simple in structure and convenient to install.

[0040] The heat sink 61 can be a single fin or multiple fins, with multiple fins 61 spaced apart on the outer surface of the left valve body 2, thereby improving the heat dissipation effect.

[0041] In one embodiment, the outer surface of the left valve body 2 has a surrounding recessed groove into which a heat sink 61 is embedded. The heat sink 61 is fitted onto the outer surface of the left valve body 2 and embedded in the recessed groove, thereby effectively strengthening the connection between the heat sink 61 and the left valve body 2. The heat sink 61 is embedded and in close contact with the heat transfer path between the welding end 21 and the main valve seat 4, ensuring that the heat sink 61 will not shift or misalign on the outer surface of the left valve body 2, resulting in high stability and guaranteeing heat dissipation.

[0042] The heat sink 61 has a higher thermal conductivity than the left valve body 2. Both the heat sink 61 and the left valve body 2 are made of metal. The heat sink 61 is made of a metal with a much higher thermal conductivity than the material of the left valve body 2. This allows the heat sink 61 to actively and quickly absorb and conduct away most of the heat when the welded end 21 of the left valve body 2 is heated, dissipating it into the flowing medium or air inside the left valve body 2. This creates a thermal barrier, significantly reducing the heat transferred to the main valve seat 4 and keeping the temperature rise in the main valve seat 4 area within a very low range. This fundamentally avoids deformation caused by uneven thermal expansion. The heat sink 61 effectively isolates and dissipates the heat generated during the welding process, preventing heat transfer to the main valve seat 4 and thus avoiding sealing failure of the main valve seat 4 due to thermal deformation.

[0043] Of course, in another embodiment, the left valve body 2 and the heat sink 61 are integrally formed. The heat dissipation structure 6 can be prefabricated on the left valve body 2 as a standard component without changing the valve body structure and assembly process. The manufacturing cost increases very little, but the benefits are huge. The structure is simple and easy to implement. At the same time, the use of integral molding process makes processing and manufacturing convenient, and the structure has high strength and high stability.

[0044] The welded ball valve, designed to prevent welding deformation at the weld joint, also includes a metal sealing ring 10. The metal sealing ring 10 is disposed on the outer surface of the main valve seat 4, between the left valve body 2 and the right valve body 1. The metal sealing ring 10 serves to strengthen the seal, thereby effectively enhancing the sealing effect between the main valve seat 4, the left valve body 2, and the right valve body 1, and further preventing leakage.

[0045] The welded ball valve designed to prevent weld deformation at the weld joint also includes a disc spring 11, which is pressed between the secondary valve seat 5 and the right valve body 1. The disc spring 11 provides a continuous elastic force, applying an axial force to the secondary valve seat 5 near the right valve body 1. This effectively compensates for minor deformations caused by vibration between the secondary valve seat 5 and the right valve body 1, ensuring a tight fit between them and effectively preventing instantaneous loss of seal, thus achieving elastic pre-tightening. Simultaneously, the disc spring 11 absorbs and attenuates some of the vibration energy transmitted to internal parts, protecting precision sealing surfaces from impact damage, achieving buffering energy absorption, reducing maintenance frequency and cost, and significantly improving the safety and stability of the welded ball valve designed to prevent weld deformation at the weld joint.

[0046] The welded ball valve designed to prevent weld deformation at the weld joint also includes a valve stem 7, a gland 8, and packing 9. The valve stem 7 is rotatably embedded in the right valve body 1 and connected to the top of the valve ball 3. The packing 9 is pressed between the outer surface of the valve stem 7 and the right valve body 1. The gland 8 is connected to the top of the right valve body 1, with its bottom pressing against the top of the packing 9. The packing 9 provides a sealing function, effectively preventing external leakage of the welded ball valve when conveying media. Simultaneously, the gland 8, connected to the top of the right valve body 1 and pressing against the packing 9, further enhances the sealing effect by tightening the packing 9 with the gland 8.

[0047] The welded ball valve designed to prevent weld deformation at the weld joint also includes a reverse sealing bearing 12. The reverse sealing bearing 12 is fitted onto the valve stem 7 and located within the right valve body 1, below the packing 9. The reverse sealing bearing 12 ensures that the valve stem 7 will not be blown out of the right valve body 1 by the medium pressure, effectively preventing catastrophic accidents. Simultaneously, the reverse sealing bearing 12 provides stable support for the valve stem 7, greatly reducing vibration-induced swaying, ensuring smooth operation, and significantly improving the safety and stability of the welded ball valve designed to prevent weld deformation at the weld joint.

[0048] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A welded ball valve for preventing weld deformation at the weld joint, characterized in that, It includes a left valve body, a right valve body, a main valve seat, a secondary valve seat, a valve ball, and a heat dissipation structure. The valve ball is rotatably located inside the right valve body. One end of the left valve body has a welded end, and the other end of the left valve body is connected to the right valve body. The main valve seat and the secondary valve seat are both located inside the right valve body, and the main valve seat is pressed between one end of the left valve body and the valve ball. The secondary valve seat is pressed between the other end of the right valve body and the valve ball. The heat dissipation structure is disposed between the welded end and the main valve seat, and one end of the heat dissipation structure is connected to the outer surface of the left valve body, while the other end of the heat dissipation structure extends outward and protrudes.

2. The welded ball valve for preventing weld deformation at the weld joint as described in claim 1, characterized in that, The distance between the heat dissipation structure and the welding end is less than the distance between the heat dissipation structure and the main valve seat.

3. The welded ball valve for preventing weld deformation at the weld joint as described in claim 1, characterized in that, The heat dissipation structure includes heat sinks, which are sleeved around the outer surface of the left valve body.

4. The welded ball valve for preventing weld deformation at the weld joint as described in claim 3, characterized in that, The thermal conductivity of the heat sink is higher than that of the left valve body.

5. The welded ball valve for preventing weld deformation at the weld joint as described in claim 3, characterized in that, The number of heat sinks is one; Alternatively, there may be multiple heat sinks, which are spaced apart on the outer surface of the left valve body.

6. The welded ball valve for preventing weld deformation at the weld joint as described in claim 3, characterized in that, The outer surface of the left valve body has a surrounding groove, into which the heat sink is embedded.

7. The welded ball valve for preventing weld deformation at the weld joint as described in claim 3, characterized in that, The left valve body is integrally formed with the heat sink.

8. The welded ball valve for preventing weld deformation at the weld joint as described in claim 1, characterized in that, The welded ball valve for preventing welding deformation at the weld joint also includes a metal sealing ring, which is disposed on the outer surface of the main valve seat and between the left valve body and the right valve body.

9. The welded ball valve for preventing weld deformation at the weld joint as described in claim 1, characterized in that, The weld ball valve that prevents welding deformation at the weld joint also includes a disc spring, which is pressed between the secondary valve seat and the right valve body.

10. The welded ball valve for preventing weld deformation at the weld joint as described in claim 1, characterized in that, The welded ball valve for preventing weld deformation at the weld joint also includes a valve stem, packing, and a gland. The valve stem is rotatably embedded in the right valve body and connected to the top of the valve ball. The packing is pressed between the outer surface of the valve stem and the right valve body. The gland is connected to the top of the right valve body, and the bottom of the gland is pressed against the top of the packing.

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