Pipe joint and pipe connection structure

Abstract

The application discloses a pipe joint and a pipe connecting structure. The pipe joint comprises a connecting piece, an adjusting assembly and a first sealing piece. The connecting piece comprises opposite first and second ends. The first end of the connecting piece is provided with a butt joint part for cooperating with another part. The second end of the connecting piece is internally provided with a connecting hole. The adjusting assembly comprises opposite first and second ends. The first end of the adjusting assembly is rotatably inserted into the connecting hole of the second end of the connecting piece. The second end of the adjusting assembly is used for butt joint with a pipe to be connected. The first sealing piece is arranged between the first end of the adjusting assembly and the second end of the connecting piece, so that the connecting piece and the adjusting assembly are sealingly connected. When the pipe joint is connected with other pipe joints or other liquid supply equipment, the pipe connected with the pipe joint can avoid being twisted or bent due to stretching, dragging or winding, and the complexity and operation difficulty of pipe connection are reduced.

Description

Technical Field

[0001] This application relates to the field of pipe connection technology, and in particular to a pipe joint and pipe connection structure. Background Technology

[0002] Pipe fittings, as key components in pipe connections, are widely used in daily life and construction, such as for connecting water pipes. Common pipe fittings include threaded fittings, clamp fittings, and flange fittings, all of which provide reliable sealing connections and ensure unobstructed fluid flow.

[0003] However, existing pipe joints, once connected to water pipes, have a limitation where the joint portion cannot rotate relative to the pipe. This can easily lead to pipe twisting or deformation during installation, requiring manual intervention for correction, significantly increasing the complexity and difficulty of installation. Moreover, in actual use, water pipes often rotate due to stretching, dragging, or coiling. If the joint portion is fixed and cannot rotate accordingly, it will cause the water pipe to bend, thereby blocking water flow, affecting usage and storage efficiency, and even exacerbating the pipe bending problem. Utility Model Content

[0004] In view of this, this application provides a pipe joint and a pipe connection structure, which prevents the pipe from twisting or bending during the installation of the pipe joint.

[0005] To achieve the above objectives, this application provides a pipe fitting, comprising: A connector, comprising a first end and a second end opposite to each other, wherein the first end of the connector has a mating portion for engaging with another component, and the second end of the connector has a connecting hole formed therein; An adjustment assembly, comprising a first end and a second end opposite to each other, wherein the first end of the adjustment assembly is rotatably inserted into a connection hole at the second end of the connector, and the second end of the adjustment assembly is used to connect to a pipe to be connected. A first sealing element is disposed between the first end of the adjusting assembly and the second end of the connecting element, so as to make the connecting element and the adjusting assembly sealed together.

[0006] In some embodiments, the connector includes a first end and a second end opposite to each other, the first end of the connector having a mating portion for engaging with another component, and the second end of the connector having a connecting hole formed inside. An adjustment assembly, comprising a first end and a second end opposite to each other, wherein the first end of the adjustment assembly is rotatably inserted into a connection hole at the second end of the connector, and the second end of the adjustment assembly is used to connect to a pipe to be connected. A first sealing element is disposed between the first end of the adjusting assembly and the second end of the connecting element, so as to make the connecting element and the adjusting assembly sealed together.

[0007] In some embodiments, the second end of the connector and the first end of the nozzle are spaced apart axially.

[0008] In some embodiments, the pipe fitting further includes an outer sleeve, wherein a first end of the nozzle extends radially outward to form a stop, and the outer sleeve encircles the nozzle and abuts against the stop in the axial direction.

[0009] In some embodiments, the pipe fitting further includes an outer sleeve, wherein the second end of the connector extends radially outward to form a stop, and the outer sleeve loops around the nozzle and the second end of the connector and abuts against the stop in the axial direction.

[0010] In some embodiments, the first end of the core includes a first core segment, a second core segment with an outer diameter smaller than the first core segment, and a first stepped surface located between the first core segment and the second core segment, and the second end of the core extends outward from the second core segment; The connecting hole includes a first hole segment, a second hole segment with an inner diameter smaller than that of the first hole segment, and a second stepped surface located between the first hole segment and the second hole segment; The first core segment transitions into the first hole segment, and the second core segment transitions into the second hole segment. The first seal is disposed between the first core segment and the first hole segment. The first stepped surface and the second stepped surface abut and are positioned in the axial direction.

[0011] In some embodiments, the mating part is an internally threaded sleeve with threads on its inner circumferential surface. The internally threaded sleeve includes an internally threaded hole communicating with the connecting hole. The inner diameter of the internally threaded hole is larger than that of the connecting hole, so that the connector forms a stepped surface facing the internally threaded hole between the internally threaded hole and the connecting hole. The pipe joint also includes a second sealing element disposed in the internally threaded sleeve and abutting against the stepped surface.

[0012] In some embodiments, the connector is made of aluminum alloy; and / or, the adjustment component is made of copper or stainless steel.

[0013] On the other hand, this application also provides a pipe connection structure, including a first component, a second component, and the aforementioned pipe joint, wherein the first component is a pipe and is connected to the second end of the adjustment assembly of the pipe joint; the second component is connected to the mating portion of the connector of the pipe joint.

[0014] In some embodiments, there are two pipe fittings, one of which has an internally threaded connecting part and the other has an externally threaded connecting part, with the internally threaded connecting part and the externally threaded connecting part threadedly engaged; the second component is a pipe, and the second ends of the adjusting assemblies of the two pipe fittings are respectively connected to the first component and the second component.

[0015] The pipe fitting provided in this application allows the first end of the adjusting component to be rotatably inserted into the connection hole of the connector, and the second end of the adjusting component to be connected to the pipe. This enables the adjusting component to rotate circumferentially relative to the connector during the connection process. When the pipe fitting of this application is connected to other pipe fittings or other liquid supply equipment, it can effectively prevent the pipe connected to the pipe fitting of this application from twisting or bending due to stretching, dragging or coiling, thereby reducing the complexity and difficulty of pipe connection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the detailed description of the embodiments are briefly introduced below. Obviously, the drawings used in the following detailed description are merely some embodiments of this application. Based on these drawings, those skilled in the art can obtain other drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a pipe joint according to an embodiment of this application; Figure 2 yes Figure 1 The pipe fitting shown is a structural cross-sectional view from one perspective. Figure 3 yes Figure 1 The exploded view of the pipe joint shown; Figure 4 This is a schematic diagram of the structure of a pipe joint according to another embodiment of this application; Figure 5 yes Figure 4 The pipe fitting shown is a structural cross-sectional view from one perspective. Figure 6 yes Figure 4 The exploded view of the pipe joint shown; Figure 7 This is a schematic diagram of a pipe connection structure according to an embodiment of this application; Figure 8 yes Figure 7 The diagram shows a cross-sectional view of the pipe connection structure from one perspective.

[0018] Explanation of reference numerals in the attached figures: Pipe fitting 100; Connector 1; Butt joint 11; Internal threaded sleeve 111; External threaded sleeve 112; Internal threaded hole 113; Connecting hole 12; First hole section 121; Second hole section 122; Second step surface 123; Step surface 13; Adjustment component 2; Core 21; First core section 211; Second core section 212; First step surface 213; Core hole 214; Groove 215; Nozzle 22; Nozzle hole 221; Anti-detachment rib 222; First seal 3; Outer sleeve 4; Stop part 5; Second seal 6; Pipe connection structure 200. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. One or more embodiments of this application are exemplarily shown in the drawings to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that this application can be implemented in many different forms and is not limited to the embodiments described below.

[0020] In the accompanying drawings of this application, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0022] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0023] Please see Figures 1 to 6This application provides a pipe joint 100, which can be used as a connecting component in a pipeline to connect and connect two components, thereby forming a circulation pipeline or a transport pipeline for fluids such as liquids or gases. For example, the pipe structure can be used to connect two pipes, such as connecting two water pipes; or, it can be used to connect a pipe to a corresponding fitting or terminal, such as connecting a water pipe to a nozzle, shower head, valve, etc.

[0024] In one specific embodiment, the pipe joint 100 includes a connector 1, an adjusting component 2, and a first sealing element 3. Specifically, the connector 1 is generally a hollow cylindrical structure, including a first end and a second end that are axially opposite each other. The first end of the connector 1 has a mating portion 11 for cooperating with another corresponding connector or component. The second end of the connector 1 has a connecting hole 12 for connecting the adjusting component 2.

[0025] In one embodiment, a pipe connector 100 is respectively configured on the two components to be connected, such as two pipes. The end of each pipe is connected to the adjustment component 2 of the corresponding pipe connector 100. The mating part 11 of the connector 100 configured on one pipe is a female and the mating part 11 of the pipe connector 100 configured on the other pipe is a male. The two mating parts 11 cooperate to realize the connection of the two pipe connectors 100, thereby realizing the connection of the two pipes.

[0026] In another embodiment, one of the two components to be connected can be a pipe, and the other can be a nozzle, shower head, valve, etc. In this case, the end of the pipe is connected to the adjustment component 2 of a pipe connector 100. The mating part 11 of the connector 100 can be a female or male connector. The nozzle, shower head, valve, etc. form a male or female connector that matches the mating part 11. In this way, the connection between the pipe and the nozzle, shower head, valve, etc. can be achieved through a single pipe connector 100.

[0027] The adjusting component 2 is generally a hollow cylindrical structure, including a first end and a second end. The first end of the adjusting component 2 is rotatably inserted into the connecting hole 12 of the second end of the connector 1, and the second end of the adjusting component 2 extends outward relative to the connector 1 to facilitate docking with the pipe to be connected. Through the rotatable engagement between the connector 1 and the adjusting component 2, the connected pipe can rotate relative to the connector 1.

[0028] The first sealing element 3 is disposed between the contact interface of the first end of the adjusting component 2 and the second end of the connecting component 1, so as to provide a sealing fit between the connecting component 1 and the adjusting component 2. Specifically, the first sealing element 3 is sandwiched between the outer peripheral wall of the first end of the adjusting component 2 and the wall of the connecting hole 12 of the connecting component 1. The first sealing element 3 is preferably a sealing ring, and its quantity can be one or more.

[0029] The pipe joint 100 provided in this application allows the first end of the adjusting component 2 to be rotatably inserted into the connecting hole 12 of the connector 1, and the second end of the adjusting component 2 to be connected to the pipe, so that the pipe can rotate relative to the connector 1 during the connection process. When the pipe joint 100 of this application is connected to other components, it can effectively prevent the pipe connected to the pipe joint 100 of this application from twisting or bending due to stretching, dragging or coiling, thereby reducing the complexity and difficulty of pipe connection.

[0030] In one embodiment, please refer to Figure 2 The adjustment assembly 2 includes a core 21 and a nozzle 22 connected to each other. Specifically, the core 21 is a hollow cylindrical structure with an internal core hole 214, including a first end and a second end opposite to each other. Similarly, the nozzle 22 is a hollow cylindrical structure with an internal nozzle hole 221, and includes a first end and a second end opposite to each other.

[0031] The first end of the core 21 is rotatably inserted into the connecting hole 12. The first sealing member 3 is sandwiched between the outer peripheral wall of the first end of the core 21 and the hole wall of the connecting hole 12 of the connector 1.

[0032] To further improve the sealing effect, in one embodiment, please refer to... Figure 2 , Figure 3 , Figure 5 and Figure 6 The pipe joint 100 includes two first sealing elements 3. These two first sealing elements 3 are arranged axially at intervals and are both sandwiched between the outer peripheral wall of the first end of the core 21 and the wall of the connecting hole 12 of the connector 1. For example, the first sealing element 3 is an O-ring, and its material includes, but is not limited to, rubber, silicone, etc., which have a certain elastic deformation capability.

[0033] To further improve sealing reliability, in one embodiment, please refer to... Figure 2 and Figure 5 An annular groove 215 is formed on the outer peripheral wall of the first end of the core 21. The first seal 3 is partially embedded in the corresponding groove 215 and partially protrudes out of the groove 215. During assembly, the first seal 3 can be pre-installed in the groove 215, and then the core 21 with the first seal 3 is inserted into the connecting hole 12 of the connector 1. During this process, the first seal 3 is deformed by the compression of the hole wall of the connecting hole 12 and a seal is formed between the hole wall and the outer peripheral wall of the core 21.

[0034] By providing the groove 215, the assembly of the pipe joint 100 can be facilitated, and the axial position of the first seal 3 after assembly can be defined, preventing the first seal 3 from falling off or slipping during installation or use. In other embodiments, an annular groove 215 can also be formed on the wall of the connecting hole 12 for installing the first seal 3.

[0035] The second end of the core 21 is screwed into the first end of the nozzle 22. Specifically, the outer peripheral wall of the second end of the core 21 has an external thread, and the nozzle hole 221 of the nozzle 22 has an internal thread. The external thread on the outer peripheral wall of the second end of the core 21 is threaded into the internal thread of the nozzle hole 221, thereby screwing the second end of the core 21 into the nozzle hole 221 of the nozzle 22.

[0036] The second end of the nozzle 22 is used to connect to a pipe. Specifically, the outer peripheral wall of the second end of the nozzle 22 is provided with multiple anti-detachment ribs 222 to prevent the pipe from falling off after connection. The multiple anti-detachment ribs 222 are arranged sequentially along the axial direction. The outer wall surface of each anti-detachment rib 222 is conical, and the outer diameter of the conical surface gradually increases along the axial direction from the second end of the nozzle 22 toward the first end of the nozzle 22, which can play a guiding role for the connection of the pipe.

[0037] In one embodiment, please refer to Figure 2 and Figure 5 The connector 1 and the nozzle 22 are spaced apart axially. Specifically, there is a certain gap between the end face of the second end of the connector 1 and the end face of the first end of the nozzle 22, which can prevent the nozzle 22 from interfering with the relative rotation between the core 21 and the connector 1, thereby preventing the core 21 from rotating with the connector 1 relative to the nozzle 22 due to jamming between the nozzle 22 and the connector 1, and ensuring the reliability of the threaded fit between the nozzle 22 and the core 21.

[0038] In one embodiment, please refer to Figure 2 and Figure 3 The pipe fitting 100 also includes a sleeve 4. The first end of the nozzle 22 extends radially outward to form a stop 5. The outer sleeve 4 surrounds the nozzle 22 and abuts against the stop 5 axially. The end of the pipe to be connected is blocked by the sleeve 4. Specifically, the stop 5 is an annular flange structure, the outer sleeve 4 is generally a hollow sleeve structure, the inner wall of the outer sleeve 4 has internal threads, and the outer peripheral wall of the second end of the nozzle 22 has external threads. The internal threads on the inner wall of the outer sleeve 4 and the external threads on the outer peripheral wall of the second end of the nozzle 22 are threaded together.

[0039] In this embodiment, the outer sleeve 4 is threadedly connected to the nozzle 22, and the nozzle 22 is then threadedly connected to the core 21. At the same time, the nozzle 22 is also connected to the pipe, so that the outer sleeve 4, the nozzle 22, the core 21 and the pipe form a whole that moves together. This whole can rotate relative to the connector 1.

[0040] The outer sleeve 4 effectively protects the connection points between the pipe and the pipe fitting 100, enhancing the safety of the pipe fitting 100 during use. Furthermore, after the adjusting component 2 of the pipe fitting 100 is fully engaged with the pipe, when the mating portion 11 of the pipe fitting 100 is connected to the mating portion 11 of another pipe fitting 100 or other components, the user can hold the outer sleeve 4 without directly holding the pipe to complete the connection. This avoids pipe damage due to direct force or improper operation, improving installation reliability. Therefore, the material of the outer sleeve 4 includes, but is not limited to, plastic, allowing it to possess both strength and flexibility.

[0041] In addition, the outer kit 4 can also adopt another connection method. In another embodiment, please refer to Figure 5 and Figure 6 The second end of the connector 1 extends radially outward to form a stop portion 5, and the outer sleeve 4 encircles the nozzle 22 and abuts against the stop portion 5 axially. In this embodiment, the outer sleeve 4 is threadedly engaged with the second end of the connector 1, thereby making the outer sleeve 4 and the connector 1 form a whole that moves together, and this whole can rotate relative to the nozzle 22, the core 21, and the pipe.

[0042] In one embodiment, please refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 Along the axial direction, the first end of the core 21 includes a first core segment 211, a second core segment 212 with an outer diameter smaller than the first core segment 211, and a first step surface 213 located between the first core segment 211 and the second core segment 212. The second end of the core 21 extends outward from the second core segment 212.

[0043] The connecting hole 12 includes a first hole segment 121, a second hole segment 122 with an inner diameter smaller than that of the first hole segment 121, and a second stepped surface 123 located between the first hole segment 121 and the second hole segment 122. The first hole segment 121 is relatively closer to the first end of the connector 1.

[0044] The core component 21 is inserted into the connecting hole 12 from the first end of the connector 1 until the first stepped surface 213 and the second stepped surface 123 abut against each other and can no longer move. At this point, the second end of the core component 21 extends out of the connecting hole 12. The first core segment 211 transitions into the first hole segment 121, and the second core segment 212 transitions into the second hole segment 122, facilitating the assembly of the core component 21 and the connector 1. Moreover, the second end of the core component 21 is screwed and fixed to the first end of the nozzle 22, so that the connector 1 and the core component 21 will not automatically detach after assembly.

[0045] Specifically, in one embodiment, please refer to Figure 2 and Figure 5 The first core segment 211 has two annular grooves 215 arranged axially at intervals. Two first sealing elements 3 are disposed between the first core segment 211 and the first hole segment 121, and are respectively embedded in one of the corresponding annular grooves 215. Since the outer diameter of the first core segment 211 is larger than that of the second core segment 212, the structural strength of the first core segment 211 is relatively higher than that of the second core segment 212. Therefore, placing the first sealing element 3 on the first core segment 211 can reduce the risk of material deformation during processing, thereby reducing the process complexity and processing cost of machining the annular grooves 215 on the core segment 21.

[0046] In one embodiment, please refer to Figures 1 to 3 The first end of the connector 1 has a mating portion 11, which is an internally threaded sleeve 111 with threads on its inner circumferential surface, allowing a structure with external threads on its outer circumferential surface to be inserted into the mating portion 11 via threaded engagement. In another embodiment, please refer to... Figures 4 to 6 The mating part 11 is an external threaded sleeve 112 with threads on its outer peripheral surface, so that the mating part 11 can be inserted into a structure with internal threads through threaded engagement.

[0047] In one embodiment, the connector 1 is made of aluminum alloy. The use of aluminum alloy for the connector 1 is lightweight and easy to process, which reduces the overall weight and manufacturing cost of the pipe fitting 100.

[0048] In one embodiment, the adjusting component 2 is made of copper or stainless steel. Compared to the connector 1, the adjusting component 2 is made of more wear-resistant copper or stainless steel, which can reduce frictional resistance during rotation. At the same time, since the metal material of the connector 1 is different from that of the adjusting component 2, cold welding or seizing between the same metals can be avoided, ensuring smooth and reliable relative rotation between the two.

[0049] Please see Figure 7 and Figure 8 This application also provides a pipe connection structure 200, which includes two pipe joints 100. The second ends of the adjusting components 2 of the two pipe joints 100 are respectively connected to two pipes. The mating portion 11 of the connector 1 of one pipe joint 100 is an internally threaded sleeve 111, and the mating portion 11 of the connector 1 of the other pipe joint 100 is an externally threaded sleeve 112. The externally threaded sleeve 112 of the mating portion 11 of one pipe joint 100 is threadedly inserted into the internally threaded sleeve 111 of the mating portion 11 of the other pipe joint 100.

[0050] In one embodiment, please refer to Figure 2 , Figure 3 as well as Figure 8The internal threaded sleeve 111 includes an internal threaded hole 113 that communicates with the connecting hole 12. The inner diameter of the internal threaded hole 113 is larger than that of the connecting hole 12, so that the connector 1 forms a stepped surface 13 facing the side where the internal threaded hole 113 is located between the internal threaded hole 113 and the connecting hole 12. The pipe joint 100 also includes a second sealing element 6, which is accommodated in the internal threaded sleeve 111 and supported on the stepped surface 13.

[0051] For example, the second sealing element 6 is an annular sealing element, and its material includes, but is not limited to, rubber, silicone, etc., which have a certain elastic deformation capability. When the external threaded sleeve 112 is screwed into the internal threaded sleeve 111 through threaded engagement, one of its axial ends abuts against the second sealing element 6, so that the second sealing element 6 is pressed axially against the stepped surface 13, thereby preventing fluid leakage between the internal threaded sleeve 111 and the external threaded sleeve 112 and ensuring the sealing performance of the connection between the two.

[0052] Finally, it should be noted that the above description only depicts preferred embodiments of this application and does not constitute a limitation on the scope of protection of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art will recognize that the technical solutions described in the foregoing embodiments can still be modified or some technical features can be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be within the scope of protection of this application.

Claims

1. A pipe fitting, characterized in that, include: A connector, comprising a first end and a second end opposite to each other, wherein the first end of the connector has a mating portion for engaging with another component, and the second end of the connector has a connecting hole formed therein; An adjustment assembly, comprising a first end and a second end opposite to each other, wherein the first end of the adjustment assembly is rotatably inserted into a connection hole at the second end of the connector, and the second end of the adjustment assembly is used to connect to a pipe to be connected. A first sealing element is disposed between the first end of the adjusting assembly and the second end of the connecting element, so as to make the connecting element and the adjusting assembly sealed together.

2. The pipe joint according to claim 1, characterized in that, The adjustment assembly includes a core and a nozzle connected to each other. The first end of the core is rotatably inserted into the connection hole. The second end of the core is screwed to the first end of the nozzle, and the second end of the nozzle is used to connect to a pipe.

3. The pipe joint according to claim 2, characterized in that, The second end of the connector and the first end of the nozzle are spaced apart axially.

4. The pipe joint according to claim 2, characterized in that, The pipe fitting also includes an outer sleeve, wherein the first end of the nozzle extends radially outward to form a stop portion, and the outer sleeve is fitted around the nozzle and abuts against the stop portion axially.

5. The pipe joint according to claim 2, characterized in that, The pipe fitting also includes an outer sleeve, the second end of the connector extends radially outward to form a stop portion, the outer sleeve loops around the nozzle and the second end of the connector and abuts against the stop portion axially.

6. The pipe joint according to claim 2, characterized in that, The first end of the core component includes a first core segment, a second core segment with an outer diameter smaller than that of the first core segment, and a first stepped surface located between the first core segment and the second core segment; the second end of the core component extends outward from the second core segment. The connecting hole includes a first hole segment, a second hole segment with an inner diameter smaller than that of the first hole segment, and a second stepped surface located between the first hole segment and the second hole segment; The first core segment transitions into the first hole segment, and the second core segment transitions into the second hole segment. The first seal is disposed between the first core segment and the first hole segment. The first stepped surface and the second stepped surface abut and are positioned in the axial direction.

7. The pipe joint according to claim 1, characterized in that, The mating part is an internally threaded sleeve with threads on its inner circumferential surface. The internally threaded sleeve includes an internally threaded hole that communicates with the connecting hole. The inner diameter of the internally threaded hole is larger than that of the connecting hole, so that the connector forms a stepped surface facing the internally threaded hole between the internally threaded hole and the connecting hole. The pipe joint also includes a second sealing element, which is disposed inside the internally threaded sleeve and abuts against the stepped surface.

8. The pipe fitting according to any one of claims 1-7, characterized in that, The connector is made of aluminum alloy; and / or the adjusting component is made of copper or stainless steel.

9. A pipe connection structure, characterized in that, It includes a first component, a second component, and a pipe fitting as described in any one of claims 1-8, wherein the first component is a pipe and is connected to the second end of the adjusting assembly of the pipe fitting; the second component is connected to the mating portion of the connector of the pipe fitting.

10. The pipe connection structure according to claim 9, characterized in that, The pipe joint consists of two parts. The connecting part of one pipe joint has an internal threaded sleeve, and the connecting part of the other pipe joint has an external threaded sleeve. The internal threaded sleeve and the external threaded sleeve are threadedly engaged. The second component is a pipe, and the second ends of the adjusting components of the two pipe joints are respectively connected to the first component and the second component.

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