A pipe connection for a ball valve

Abstract

The application discloses a pipeline connecting piece for a ball valve, which comprises a first connecting assembly and a second connecting assembly; the first connecting assembly is detachably connected to a first end of the ball valve and comprises a first connecting pipe body, a first compression nut and a first sealing ring; one end of the first connecting pipe body is connected to the first end of the ball valve, the other end is connected to a first pipeline and is compressed by the first compression nut, and the first sealing ring is arranged between the first pipeline and the first connecting pipe body; the second connecting assembly is detachably connected to a second end of the ball valve and comprises a second connecting pipe body, a second compression nut and a second sealing ring; one end of the second connecting pipe body is connected to the second end of the ball valve, the other end is connected to a second pipeline and is compressed by the second compression nut, and the second sealing ring is arranged between the second pipeline and the second connecting pipe body. The pipeline connecting piece can quickly complete the connection, installation and dismounting of the pipeline and the ball valve, has a simple structure and good sealing performance.

Description

Technical Field

[0001] This invention belongs to the field of pipe connection technology, and specifically relates to a pipe connector for ball valves. Background Technology

[0002] Pipe fittings are used to connect pipe ends to extend the pipe. Pipe construction is a crucial part of water conservancy projects, and pipe fittings, as important accessories for connecting pipes, play a role in securing the connection.

[0003] The invention patent with announcement number CN215674112U discloses a connector for water supply pipes, including a first connecting frame, a first water pipe, and a second water pipe. One end of the first water pipe is fixedly connected to a second connecting rod, and both ends of the second connecting rod are fixedly connected to fixing blocks. In this invention, a threaded rod and a U-shaped groove are provided. The threaded rod is rotated towards the first water pipe and passes through the U-shaped groove. Then, by rotating the nut, the first connecting rod and the second connecting rod are tightly fitted together. The silicone blocks on the inner sides of the first connecting rod and the second connecting rod provide waterproof protection to prevent leakage.

[0004] While the aforementioned patent can achieve the function of connecting pipes, the connector can only connect adjacent pipes and is relatively troublesome to install. Some complex connectors require special tools and skills to install correctly, which increases the difficulty of construction. Summary of the Invention

[0005] To address at least one technical problem of the prior art, the present invention provides a pipe connector for a ball valve.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is: a pipe connector for a ball valve, used to connect the ball valve to a pipe, comprising: A first connecting assembly is detachably connected to the first end of the ball valve, including a first connecting pipe body, a first clamping nut and a first sealing ring. One end of the first connecting pipe body is connected to the first end of the ball valve, and the other end is connected to a first pipe and clamped by the first clamping nut. The first sealing ring is disposed between the first pipe and the first connecting pipe body. And a second connecting assembly, detachably connected to the second end of the ball valve, including a second connecting pipe body, a second clamping nut and a second sealing ring, one end of the second connecting pipe body being connected to the second end of the ball valve and the other end being connected to the second pipe and clamped by the second clamping nut, the second sealing ring being disposed between the second pipe and the second connecting pipe body.

[0007] In some embodiments, both the end of the first connecting pipe body connected to the ball valve and the end of the second connecting pipe body connected to the ball valve are provided with external threads, and the first connecting pipe body, the second connecting pipe body and the ball valve are threadedly connected.

[0008] In some embodiments, the first connecting assembly further includes a first connecting sleeve, in which the first connecting tube body and the first pipe are mated, and the first clamping nut is disposed on the outside of the first connecting sleeve.

[0009] In some embodiments, the other end of the first connecting tube is provided with an outwardly extending first annular boss, and the inner wall of the first connecting sleeve is provided with a plurality of first limiting protrusions evenly distributed in the circumferential direction. When the other end of the first connecting tube is disposed in the first connecting sleeve, the end of the first annular boss abuts against the end of the first limiting protrusion.

[0010] In some embodiments, the first connecting assembly further includes a first connecting tapered tube, one end of which is inserted into the first pipe and the other end which is connected to the first connecting pipe body. The first sealing ring is disposed between the first connecting tapered tube and the first connecting pipe body, and the first clamping nut is disposed on the outside of the joint between the first connecting tapered tube and the first connecting pipe body.

[0011] In some embodiments, the first connecting tapered pipe includes a tapered section and a connecting section connected as one piece. The outer diameter of the tapered section decreases continuously along the axial direction. The tapered section is inserted into the first pipe. The outer diameter of the connecting section is greater than the maximum outer diameter of the tapered section. The connecting section is connected to the first connecting pipe body.

[0012] In some embodiments, the end of the docking section is provided with an outwardly extending first limiting ring, the first clamping nut has a constriction, and the docking section is limited within the first clamping nut by the cooperation of the constriction and the first limiting ring. The other end of the first connecting tube is provided with an external thread that mates with the first clamping nut.

[0013] In some embodiments, the second connecting assembly further includes a second connecting sleeve, in which the second connecting tube body and the second pipe are mated, and the second clamping nut is disposed on the outside of the second connecting sleeve.

[0014] In some embodiments, the second connecting assembly further includes a second connecting tapered tube, one end of which is inserted into the second pipe and the other end which is connected to the second connecting pipe body. The second sealing ring is disposed between the second connecting tapered tube and the second connecting pipe body, and the second clamping nut is disposed on the outside of the joint between the second connecting tapered tube and the second connecting pipe body.

[0015] In some embodiments, the other end of the first connecting pipe is provided with an outwardly extending first limiting protrusion, the first clamping nut has a constriction, and the other end of the first connecting pipe is limited in the first clamping nut by the constriction and the first limiting protrusion. The connecting end of the first pipe is provided with an external thread that mates with the first clamping nut, and the first connecting pipe and the first pipe are connected at the first clamping nut. The other end of the second connecting pipe is provided with an outwardly extending second limiting protrusion. The second clamping nut has a constriction. The constriction and the second limiting protrusion limit the other end of the second connecting pipe in the second clamping nut. The connecting end of the second pipe is provided with an external thread that mates with the second clamping nut. The second connecting pipe and the second pipe are connected at the second clamping nut.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The pipe connector for ball valve of the present invention has a connecting pipe body and a clamping nut. The connecting pipe body can be connected to the ball valve by turning the knob of the connecting pipe body, and the connecting pipe body can be connected to the pipe by turning the clamping nut. It can quickly complete the connection, installation and disassembly of the pipe and the ball valve. In addition, there is a sealing ring between the connecting pipe body and the pipe to prevent liquid from leaking from the connection pipe body and the pipe. The structure is simple.

[0017] 2. The pipe connector for ball valves of the present invention further includes a connecting cone and a connecting sleeve. The connecting cone can be connected to a flexible hose, and the connecting sleeve can be connected to a PVC pipe. Therefore, the pipe connector of the present invention can be connected to different types of pipes. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure after the pipe connector is connected to the ball valve in Embodiment 1 of the present invention; Figure 2 This is an exploded view of the pipe connection components for the ball valve in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the pipe connector connecting the ball valve and the pipe in Embodiment 2 of the present invention; Figure 4This is an exploded view of the pipe connection components used for the ball valve in Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the structure of the pipe connector connecting the ball valve and the pipe in Embodiment 3 of the present invention; Figure 6 This is an exploded view of the pipe connection components for the ball valve in Embodiment 3 of the present invention; Figure 7 This is a schematic diagram of the structure of the pipe connector connecting the ball valve and the pipe in Embodiment 4 of the present invention; Figure 8 The exploded view shows the pipe connection components used for the ball valve in Embodiment 4 of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1 Please refer to Figure 1 and Figure 2 This invention provides a pipe connector for a ball valve, used to connect a ball valve 3 to a pipe. It includes a first connecting assembly 1 and a second connecting assembly 2. The first connecting assembly 1 is detachably connected to a first end of the ball valve 3, and the second connecting assembly 2 is detachably connected to a second end of the ball valve 3. The first connecting assembly 1 includes a first connecting pipe body 11, a first clamping nut 12, and a first sealing ring 13. One end of the first connecting pipe body 11 is connected to the first end of the ball valve 3, and the other end is connected to a first pipe 4 and clamped by the first clamping nut 12. The first sealing ring 13 is disposed between the first pipe 4 and the first connecting pipe body 11. The second connecting assembly 2 includes a second connecting pipe body 21, a second clamping nut 22, and a second sealing ring 23. One end of the second connecting pipe body 21 is connected to the second end of the ball valve 3, and the other end is connected to a second pipe 5 and clamped by the second clamping nut 22. The second sealing ring 23 is disposed between the second pipe 5 and the second connecting pipe body 21.

[0027] When connecting ball valve 3 to the pipeline, the connecting pipe body can be connected to ball valve 3 by turning the knob, and the connecting pipe body can be connected to the pipeline by turning the tightening nut. The connection, installation and disassembly of the pipeline and ball valve 3 can be completed quickly. There is a sealing ring between the connecting pipe body and the pipeline to prevent liquid from leaking from between the connecting pipe body and the pipeline. The structure is simple and the sealing performance is good.

[0028] Furthermore, the first connecting pipe body 11 and the second connecting pipe body 21 are respectively threadedly connected to the ball valve 3. Specifically, the first connecting pipe body 11 is partially disposed inside the ball valve 3, and the portion of the first connecting pipe body 11 disposed inside the ball valve 3 is provided with an external thread that mates with the internal thread of the ball valve 3; the second connecting pipe body 21 is partially disposed inside the ball valve 3, and the portion of the second connecting pipe body 21 disposed inside the ball valve 3 is provided with an external thread that mates with the internal thread of the ball valve 3.

[0029] In some embodiments, when the first connecting assembly 1 and the second connecting assembly 2 are respectively connected to threaded pipes, the other end of the first connecting pipe body 11 is provided with an outwardly extending first limiting protrusion 210, and the first clamping nut 12 has a constriction, which, together with the first limiting protrusion 210, limits the other end of the first connecting pipe body 11 within the first clamping nut 12. The connecting end of the first pipe 4 is provided with an external thread that mates with the first clamping nut 12, and the first connecting pipe body 11 and the first pipe 4 are connected to the first clamping nut 12. The other end of the second connecting pipe body 21 is provided with an outwardly extending second limiting protrusion 220, and the second clamping nut 22 has a constriction, which, together with the second limiting protrusion 220, limits the other end of the second connecting pipe body 21 within the second clamping nut 22. The connecting end of the second pipe 5 is provided with an external thread that mates with the second clamping nut 22, and the second connecting pipe body 21 and the second pipe 5 are connected to the second clamping nut 22.

[0030] Example 2 This embodiment is based on the first embodiment described above, and the similarities with the first embodiment will not be repeated.

[0031] Reference Figure 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that, when the first pipe 4 and the second pipe 5 are PVC pipes, the first connecting assembly 1 further includes a first connecting sleeve 14, the first connecting pipe body 11 and the first pipe 4 are connected in the first connecting sleeve 14, and the first clamping nut 12 is disposed on the outside of the first connecting sleeve 14. The second connecting assembly 2 further includes a second connecting sleeve 24, the second connecting pipe body 21 and the second pipe 5 are connected in the second connecting sleeve 24, and the second clamping nut 22 is disposed on the outside of the second connecting sleeve 24.

[0032] Furthermore, the other end of the first connecting tube 11 is provided with an outwardly extending first annular boss 110, and the inner wall of the first connecting sleeve 14 is provided with a plurality of first limiting protrusions (not shown) evenly distributed in the circumferential direction. When the other end of the first connecting tube 11 is disposed in the first connecting sleeve 14, the end of the first annular boss 110 abuts against the end of the first limiting protrusion.

[0033] Furthermore, the other end of the second connecting tube 21 is provided with an outwardly extending second annular boss 210, and the inner wall of the second connecting sleeve 24 is provided with a plurality of second limiting protrusions (not shown in the figure) evenly distributed along the circumference. When the other end of the second connecting tube 21 is disposed in the second connecting sleeve 24, the end of the second annular boss 210 abuts against the end of the first limiting protrusion.

[0034] Example 3 This embodiment is based on the first embodiment described above, and the similarities with the first embodiment will not be repeated.

[0035] Reference Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that, when the first pipe 4 and the second pipe 5 are flexible hoses, the first connecting assembly 1 further includes a first connecting tapered tube 15. One end of the first connecting tapered tube 15 is inserted into the first pipe 4, and the other end is connected to the first connecting pipe body 11. A first sealing ring 13 is disposed between the first connecting tapered tube 15 and the first connecting pipe body 11, and a first clamping nut 12 is disposed on the outside of the joint between the first connecting tapered tube 15 and the first connecting pipe body 11. The second connecting assembly 2 further includes a second connecting tapered tube 25. One end of the second connecting tapered tube 25 is inserted into the second pipe 5, and the other end is connected to the second connecting pipe body 21. A second sealing ring 23 is disposed between the second connecting tapered tube 25 and the second connecting pipe body 21, and a second clamping nut 22 is disposed on the outside of the joint between the second connecting tapered tube 25 and the second connecting pipe body 21.

[0036] In some embodiments, the first connecting tapered pipe 15 includes a tapered section 151 and a connecting section 152 connected as one piece. The outer diameter of the tapered section 151 decreases continuously along the axial direction. The tapered section 151 is inserted into the first pipe 4. The outer diameter of the connecting section 152 is greater than the maximum outer diameter of the tapered section 151. The connecting section 152 is connected to the first connecting pipe body 11.

[0037] In some embodiments, the end of the mating section 152 is provided with an outwardly extending first limiting ring 153, the first clamping nut 12 has a constriction, and the mating section 152 is limited within the first clamping nut 12 by the cooperation of the constriction and the first limiting ring 153. The other end of the first connecting tube 11 is provided with an external thread that cooperates with the first clamping nut 12.

[0038] In some embodiments, the second connecting tapered pipe 25 includes a tapered section 251 and a connecting section 252 connected as one piece. The outer diameter of the tapered section 251 decreases continuously along the axial direction. The tapered section 251 is inserted into the second pipe 5. The outer diameter of the connecting section 252 is greater than the maximum outer diameter of the tapered section 251. The connecting section 252 is connected to the second connecting pipe body 21.

[0039] In some embodiments, the end of the mating section 252 is provided with an outwardly extending second limiting ring 253, the second clamping nut 22 has a constriction, and the mating section 252 is limited within the second clamping nut 22 by the cooperation of the constriction and the second limiting ring 253. The other end of the second connecting tube 21 is provided with an external thread that cooperates with the second clamping nut 22.

[0040] Example 4 This embodiment is based on the first embodiment described above, and the similarities with the first embodiment will not be repeated.

[0041] Reference Figure 7 and Figure 8 The difference between this embodiment and Embodiment 1 is that, when the first pipe 4 is a flexible hose and the second pipe 5 is a PVC pipe, the first connecting assembly 1 further includes a first connecting tapered tube 15. One end of the first connecting tapered tube 15 is inserted into the first pipe 4, and the other end is connected to the first connecting pipe body 11. A first sealing ring 13 is disposed between the first connecting tapered tube 15 and the first connecting pipe body 11, and a first clamping nut 12 is disposed on the outside of the joint between the first connecting tapered tube 15 and the first connecting pipe body 11. The second connecting assembly 2 further includes a second connecting sleeve 24. The second connecting pipe body 21 and the second pipe 5 are connected in the second connecting sleeve 24, and a second clamping nut 22 is disposed on the outside of the second connecting sleeve 24.

[0042] In some embodiments, the first connecting tapered pipe 15 includes a tapered section 151 and a connecting section 152 connected as one piece. The outer diameter of the tapered section 151 decreases continuously along the axial direction. The tapered section 151 is inserted into the first pipe 4. The outer diameter of the connecting section 152 is greater than the maximum outer diameter of the tapered section 151. The connecting section 152 is connected to the first connecting pipe body 11.

[0043] In some embodiments, the end of the mating section 152 is provided with an outwardly extending first limiting ring 153, the first clamping nut 12 has a constriction, and the mating section 152 is limited within the first clamping nut 12 by the cooperation of the constriction and the first limiting ring 153. The other end of the first connecting tube 11 is provided with an external thread that cooperates with the first clamping nut 12.

[0044] Furthermore, the other end of the second connecting tube 21 is provided with an outwardly extending second annular boss 210, and the inner wall of the second connecting sleeve 24 is provided with a plurality of second limiting protrusions (not shown in the figure) evenly distributed along the circumference. When the other end of the second connecting tube 21 is disposed in the second connecting sleeve 24, the end of the second annular boss 210 abuts against the end of the first limiting protrusion.

[0045] Example 5 This embodiment is based on the first embodiment described above, and the similarities with the first embodiment will not be repeated.

[0046] The difference between this embodiment and Embodiment 1 is that, when the first pipe 4 is a PVC pipe and the second pipe 5 is a flexible hose, the first connecting assembly 1 further includes a first connecting sleeve 14, the first connecting pipe body 11 and the first pipe 4 are connected in the first connecting sleeve 14, and the first clamping nut 12 is disposed on the outside of the first connecting sleeve 14. The second connecting assembly 2 further includes a second connecting tapered tube 25, one end of which is inserted into the second pipe 5, and the other end is connected to the second connecting pipe body 21. A second sealing ring 23 is disposed between the second connecting tapered tube 25 and the second connecting pipe body 21, and a second clamping nut 22 is disposed on the outside of the joint between the second connecting tapered tube 25 and the second connecting pipe body 21.

[0047] Furthermore, the other end of the first connecting tube 11 is provided with an outwardly extending first annular boss 110, and the inner wall of the first connecting sleeve 14 is provided with a plurality of first limiting protrusions (not shown) evenly distributed in the circumferential direction. When the other end of the first connecting tube 11 is disposed in the first connecting sleeve 14, the end of the first annular boss 110 abuts against the end of the first limiting protrusion.

[0048] In some embodiments, the second connecting tapered pipe 25 includes a tapered section 251 and a connecting section 252 connected as one piece. The outer diameter of the tapered section 251 decreases continuously along the axial direction. The tapered section 251 is inserted into the second pipe 5. The outer diameter of the connecting section 252 is greater than the maximum outer diameter of the tapered section 251. The connecting section 252 is connected to the second connecting pipe body 21.

[0049] In some embodiments, the end of the mating section 252 is provided with an outwardly extending second limiting ring 253, the second clamping nut 22 has a constriction, and the mating section 252 is limited within the second clamping nut 22 by the cooperation of the constriction and the second limiting ring 253. The other end of the second connecting tube 21 is provided with an external thread that cooperates with the second clamping nut 22.

[0050] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe connector for a ball valve, characterized in that, For connecting the ball valve (3) to the pipeline, including: A first connecting assembly (1), detachably connected to the first end of the ball valve (3), includes a first connecting pipe body (11), a first clamping nut (12), and a first sealing ring (13). One end of the first connecting pipe body (11) is connected to the first end of the ball valve (3), and the other end is connected to the first pipe (4) and clamped by the first clamping nut (12). The first sealing ring (13) is disposed between the first pipe (4) and the first connecting pipe body (11). The second connecting assembly (2) is detachably connected to the second end of the ball valve (3), including a second connecting pipe body (21), a second clamping nut (22), and a second sealing ring (23). One end of the second connecting pipe body (21) is connected to the second end of the ball valve (3), and the other end is connected to the second pipe (5) and clamped by the second clamping nut (22). The second sealing ring (23) is disposed between the second pipe (5) and the second connecting pipe body (21).

2. The pipe connector for a ball valve as described in claim 1, characterized in that, The first connecting pipe (11) is connected to the ball valve (3) at one end and the second connecting pipe (21) is connected to the ball valve (3) at the other end, both of which are provided with external threads. The first connecting pipe (11), the second connecting pipe (21) and the ball valve (3) are threadedly connected.

3. The pipe connector for a ball valve as described in claim 1, characterized in that, The first connecting assembly (1) further includes a first connecting sleeve (14), in which the first connecting tube (11) and the first pipe (4) are mated, and the first clamping nut (12) is disposed on the outside of the first connecting sleeve (14).

4. The pipe connector for a ball valve as described in claim 3, characterized in that, The other end of the first connecting tube (11) is provided with an outwardly extending first annular boss (110), and the inner wall of the first connecting sleeve (14) is provided with a plurality of first limiting protrusions evenly distributed along the circumference. When the other end of the first connecting tube (11) is disposed in the first connecting sleeve (14), the end of the first annular boss (110) abuts against the end of the first limiting protrusion.

5. The pipe connector for a ball valve as described in claim 1, characterized in that, The first connecting assembly (1) further includes a first connecting tapered tube (15), one end of which is inserted into the first pipe (4), and the other end is connected to the first connecting pipe body (11). The first sealing ring (13) is disposed between the first connecting tapered tube (15) and the first connecting pipe body (11), and the first clamping nut (12) is disposed on the outside of the part where the first connecting tapered tube (15) and the first connecting pipe body (11) meet.

6. The pipe fitting for a ball valve as described in claim 5, characterized in that, The first connecting tapered pipe (15) includes a tapered section (151) and a connecting section (152) connected as one piece. The outer diameter of the tapered section (151) decreases continuously along the axial direction. The tapered section (151) is inserted into the first pipe (4). The outer diameter of the connecting section (152) is greater than the maximum outer diameter of the tapered section (151). The connecting section (152) is connected to the first connecting pipe body (11).

7. The pipe connector for a ball valve as described in claim 6, characterized in that, The end of the docking section (152) is provided with an outwardly extending first limiting ring (153), and the first clamping nut (12) has a constriction. The docking section (152) is limited within the first clamping nut (12) by the cooperation of the constriction and the first limiting ring (153). The other end of the first connecting tube (11) is provided with an external thread that cooperates with the first clamping nut (12).

8. The pipe fitting for a ball valve as described in any one of claims 1 to 7, characterized in that, The second connecting assembly (2) further includes a second connecting sleeve (24), in which the second connecting tube body (21) and the second pipe (5) are mated, and the second clamping nut (22) is disposed on the outside of the second connecting sleeve (24).

9. The pipe fitting for a ball valve as described in any one of claims 1 to 7, characterized in that, The second connecting assembly (2) further includes a second connecting tapered tube (25), one end of which is inserted into the second pipe (5), and the other end is connected to the second connecting pipe body (21). The second sealing ring (23) is disposed between the second connecting tapered tube (25) and the second connecting pipe body (21), and the second clamping nut (22) is disposed on the outside of the part where the second connecting tapered tube (25) and the second connecting pipe body (21) meet.

10. The pipe fitting for a ball valve as described in claim 1, characterized in that, The other end of the first connecting tube (11) is provided with an outwardly extending first limiting protrusion (210), the first clamping nut (12) has a constriction, and the other end of the first connecting tube (11) is limited in the first clamping nut (12) by the constriction and the first limiting protrusion (210). The connecting end of the first pipe (4) is provided with an external thread that mates with the first clamping nut (12). The first connecting tube (11) and the first pipe (4) are connected at the first clamping nut (12). The other end of the second connecting tube (21) is provided with an outwardly extending second limiting protrusion (220). The second clamping nut (22) has a constriction. The constriction and the second limiting protrusion (220) limit the other end of the second connecting tube (21) within the second clamping nut (22). The connecting end of the second pipe (5) is provided with an external thread that mates with the second clamping nut (22). The second connecting tube (21) and the second pipe (5) are connected at the second clamping nut (22).

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