Connector assembly and pipeline piece connecting device

Abstract

The utility model discloses a connector assembly and a pipeline piece connecting device, the connector assembly comprises a connector main body and a first pipe connecting part, the first pipe connecting part is fixedly connected with the connector main body, the first pipe connecting part is provided with a first channel penetrating in the axial direction of the first pipe connecting part, the connector assembly comprises a containing cavity, and the connector assembly comprises a valve element and an elastic piece; the valve element is located in the containing cavity, one end of the elastic piece abuts against the extending part, and the other end of the elastic piece abuts against the first pipe connecting part or the connector body. The valve element comprises a valve element body and an extending part, the extending part extends from one end of the valve element body to one side of the elastic piece, and the elastic piece abuts against the extending part. The connector assembly comprises a first working state and a second working state, in the first working state, the peripheral wall of the valve element body is in sealing fit with the inner side wall of the connector body, and in the second working state, a gap is formed between the peripheral wall of the valve element body and the inner side wall of the connector body.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a joint assembly and a pipe fitting connection device. Background Art

[0002] A household air conditioner includes an indoor unit and an outdoor unit, which are connected by a connecting pipe. A stop valve is set on one side of the outdoor unit. The outdoor unit needs to be filled with a certain amount of refrigerant before leaving the factory. After the air conditioner is installed, the pipes of the indoor unit and the outdoor unit are connected, and the stop valve is opened to allow the refrigerant to enter the indoor unit. In related technologies, in order to achieve rapid disassembly and assembly of the pipes connecting the indoor unit and the stop valve, a quick connector is set between the stop valve and the pipe. Although this improves the convenience of connection, the cost also increases accordingly. Summary of the Invention

[0003] The present application aims to provide a joint assembly and a pipe fitting connection device that can reduce costs and are easy to assemble.

[0004] In one aspect, the present application provides a connector assembly, comprising a connector body and a first connecting portion, wherein the first connecting portion is fixedly connected to the connector body, the first connecting portion having a first passage extending axially therethrough, the connector assembly comprising an accommodating cavity, the connector assembly comprising a valve core and an elastic member, the valve core being located in the accommodating cavity;

[0005] The valve core includes a valve core body and an extension portion, wherein the extension portion extends from one end of the valve core body toward one side of the elastic member, one end of the elastic member abuts against the extension portion, and the other end abuts against the first connecting pipe portion or the joint body;

[0006] The joint assembly includes a first working state and a second working state. In the first working state, the outer peripheral wall of the valve core body and the inner wall of the joint body are sealed together. In the second working state, there is a gap between the outer peripheral wall of the valve core body and the inner wall of the joint body.

[0007] The connector assembly of the present application is provided with a first connecting pipe portion, which can be used to connect the pipeline of the outdoor unit. The valve core is pushed to move by the elastic member to realize the switching of the two working states of the connector assembly, thereby realizing the connection and cutoff of the pipeline.

[0008] Another aspect of the present application provides a pipe fitting connection device, comprising a connector assembly and a connection assembly capable of plugging and mating, the connector assembly comprising a connector body, a valve core, and a first connecting portion, the first connecting portion being fixedly connected to the connector body, and the connector body comprising a recessed portion;

[0009] The connecting assembly includes a clamping member, a connecting body, a core shaft, a sliding assembly, and a second connecting portion, wherein the second connecting portion is fixedly connected to the connecting body, the sliding assembly is arranged between the connecting body and the core shaft, a second channel is defined between the sliding assembly and the core shaft, and the sliding assembly is capable of moving in the axial direction of the connecting assembly relative to the connecting body and the core shaft;

[0010] When the joint assembly and the connecting assembly are matched, part of the clamping member can be located in the recessed portion, a gap is provided between the outer peripheral wall of the valve core and the inner side wall of the joint body, and the second channel is connected to the gap.

[0011] The pipe fitting connection device of the present application includes a joint assembly and a connection assembly. The joint body of the joint assembly is provided with a recessed portion. Correspondingly, the connection assembly is provided with a snap-in component. When the joint assembly and the connection assembly are docked, part of the snap-in component can be limited to the recessed portion to achieve quick connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of a pipe fitting connection device of the present application;

[0013] Figure 2 This is a partial cross-sectional structural schematic diagram of a connector assembly of the present application;

[0014] Figure 3 This is a schematic cross-sectional view of a connector assembly of the present application;

[0015] Figure 4 A schematic diagram of the structure of a joint assembly and other pipe components of the present application;

[0016] Figure 5 for Figure 3 A schematic diagram of a three-dimensional structure of an embodiment of a valve core;

[0017] Figure 6 for Figure 3 A schematic cross-sectional view of an embodiment of the connector body;

[0018] Figure 7 This is a schematic cross-sectional view of a pipe fitting connection device according to the present application;

[0019] Figure 8 for Figure 7 A schematic cross-sectional structural diagram of an embodiment of a connecting component.

[0020] Reference numerals:

[0021] 10. Connector assembly; 11. Connector body; 12. First connecting pipe portion; 121. First channel; 117. Accommodating chamber; 13. Valve core; 14. Elastic member; 17. Gap; 118. First interface portion; 119. Cavity portion; 1181. Accommodating groove; 15. Sealing member; 114. First limiting portion; 131. Valve core body; 132. Extension portion; 1321. Communication port; 1322. Leg; 16. Abutment member; 122. Pipe connecting section; 123. Fitting section; 124. Second Limiting portion; 112, second interface portion; 1121, third limiting portion; 116, recessed portion; 20, connecting assembly; 28, snap-fitting member; 27, connecting body; 22, core shaft; 23, sliding assembly; 29, second connecting pipe portion; 100, piping; 231, sleeve; 232, bushing; 233, second channel; 271, hole portion; 2321, first locking portion; 2311, second locking portion; 21, cover assembly; 211, cover; 212, spring; 2111, pushing portion. Specific embodiments

[0022] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0023] It should be understood that the words "first", "second" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one; "several" indicates a quantity of two or more, unless otherwise specified. Directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in the text are defined relative to the structure shown in the corresponding drawings. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects.

[0024] The pipe fitting connection device of the exemplary embodiment of the present application is described in detail below with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can complement or be combined with each other.

[0025] The following is combined with Figure 1 To the attached Figure 8 Certain embodiments are described in detail.

[0026] like Figure 1 The present application provides a joint assembly 10, including a joint body 11 and a first connecting pipe portion 12, the first connecting pipe portion 12 is fixedly connected to one end of the joint body 11, the fixed connection here can be welding, threaded connection, clamping, interference fit or a combination of the two connection methods, the first connecting pipe portion 12 is provided with a first channel 121 running through it axially, the joint assembly 10 includes an accommodating cavity 117, the first channel 121 is connected to the accommodating cavity 117, further, the joint assembly 10 includes a valve core 13 and an elastic member 14, the valve core 13 is located in the accommodating cavity 117, one end of the elastic member 14 abuts the valve core 13, and the other end abuts the first connecting pipe portion 12, the abutment here can be direct abutment or indirect abutment, and the elastic member 14 can push the valve core 13 to move.

[0027] like Figure 2 、 Figure 3 and Figure 4 Furthermore, the joint assembly 10 includes a first working state and a second working state. In the first working state, the outer peripheral wall of the valve core 13 and the inner side wall of the joint body 11 are sealed, that is, the valve core 13 blocks one side outlet of the accommodating chamber 117; in the second working state, a gap 17 is formed between the outer peripheral wall of the valve core 13 and the inner side wall of the joint body 11, and the refrigerant in the accommodating chamber 117 can flow out through the gap 17. When the end of the first connecting pipe 12 facing away from the joint body 11 is connected to the pipeline of the outdoor unit, if the joint assembly 10 is in the first working state, the refrigerant in the outdoor unit will not flow out through the joint assembly 10, achieving the function of cutting off the outflow of refrigerant; when the joint assembly 10 is in the second working state, the refrigerant in the outdoor unit can flow out through the gap 17.

[0028] like Figure 6The connector body 11 includes a cavity portion 119 and a first interface portion 118. The first interface portion 118 is located at one end of the connector body 11 away from the first connecting pipe portion 12. The inner diameter of the cavity portion 119 is smaller than the inner diameter of the first interface portion 118. Furthermore, the inner diameter of at least part of the valve core 13 is smaller than or equal to the inner diameter of the first interface portion 118. The first interface portion 118 includes a receiving groove 1181, which is arranged along the circumference of the first interface portion 118. The connector assembly 10 includes a sealing member 15, at least part of which is located in the receiving groove 1181. In some In an embodiment, there may be multiple accommodating grooves 1181 and seals 15, for example, there are two accommodating grooves 1181, and correspondingly there are two seals 15, and the two seals 15 and the accommodating grooves 1181 are arranged at intervals along the circumferential direction; in some embodiments, when the joint assembly 10 is in the first working state, along the radial direction of the seal 15, one side of the seal 15 abuts against the groove wall of the accommodating groove 1181, and the other side abuts against the outer wall of the valve core 13, and by setting the seal 15, the valve core 13 and the joint body 11 are sealed, thereby achieving the purpose of cutting off the outflow of refrigerant.

[0029] like Figure 2 、 Figure 3 and Figure 6 A first limiting portion 114 is provided on the inner side of the connector body 11. The first limiting portion 114 is provided along the circumference of the connector body 11 and is located between the cavity portion 119 and the first interface portion 118 along the axial direction of the connector body 11. When the connector assembly 10 is in the first working state, the first limiting portion 114 cooperates with the outer wall surface of the valve core 13 to limit the movement of the valve core 13 to the side away from the elastic member 14. That is, at this time, the first limiting portion 114 and the valve core 13 abut against each other. By providing the first limiting portion 114 on the inner side of the connector body 11, both the first limiting portion 114 and the elastic member 14 act on the valve core 13. The restoring force of the elastic member 14 and the abutting force of the first limiting portion 114 are balanced, so that the valve core 13 is located at one side port of the connector body 11.

[0030] like Figure 3 、 Figure 4 and Figure 5The valve core 13 includes a valve core body 131 and an extension portion 132. The extension portion 132 extends from one end of the valve core body 131 toward the side of the elastic member 14. The extension portion 132 includes a communication port 1321. The communication port 1321 is arranged along the circumference of the valve core 13 and communicates with the accommodating cavity 117. Furthermore, the outer diameter of the valve core body 131 is smaller than the outer diameter of the extension portion 132. The elastic member 14 abuts the extension portion 132. The abutment here can be direct or indirect. By setting the outer diameter of the extension portion 132 to be larger than the outer diameter of the valve core body 131, it is helpful to expand the outer diameter of the elastic member 14. In addition, without increasing the outer diameter of the joint body 11, it is helpful to increase the outer diameter of the elastic member 14, thereby relatively improving the actuation stability of the elastic member 14. When the joint assembly 10 is in the first working state, the valve core body 131 is located in the first interface portion 118, the extension portion 132 is located in the cavity portion 119, and the first limit portion 114 and the connection between the valve core body 131 and the extension portion 132 are in contact with each other; when the joint assembly 10 is in the second working state, the valve core 13 overcomes the elastic force of the elastic member 14 under the action of external force and moves toward the side of the elastic member 14, and the valve core body 131 is separated from the first interface portion 118 and located in the cavity portion 119. Since the inner diameter of the cavity portion 119 is larger than the outer diameter of the valve core body 131, a gap 17 is formed between the valve core body 131 and the cavity portion 119, and the refrigerant in the outdoor unit pipeline flows into the accommodating cavity 117 through the first channel 121, flows into the gap 17 through the connecting port 1321 and flows out of the joint assembly 10. Figure 5 Specifically, the extension portion 132 is a support leg 1322. In some embodiments, the valve core 13 includes at least three support legs 1322, and a connecting port 1321 is formed between two adjacent support legs 1322. The elastic member 14 directly abuts the support leg 1322, or the valve core 13 includes an abutment 16. The abutment 16 is annular and is arranged between the elastic member 14 and the support leg 1321. The elastic member 14 indirectly abuts the support leg 1322 through the abutment 16. By providing the abutment 16, the contact area with the elastic member 14 is increased, thereby achieving a better abutment effect between the elastic member 14 and the support leg 1322.

[0031] like Figure 3The other end of the elastic member 14 abuts against the first connecting portion 12. The first connecting portion 12 includes a pipe connecting section 122 and a matching section 123. The pipe connecting section 122 is connected to the pipeline of the outdoor unit. The first connecting portion 12 is connected to the joint body 11 through the matching section 123. Further, the first connecting portion 12 includes a second limiting portion 124. The second limiting portion 124 is located between the connecting section 122 and the matching section 123. The inner diameter of the matching section 123 is larger than the inner diameter of the limiting portion 124. One end of the elastic member 14 abuts against the second limiting portion 124 to achieve axial limitation of the elastic member 14. Further, the outer diameter of the elastic member 14 is Slightly smaller than the inner diameter of the mating section 123 and / or the cavity portion 119. "Slightly smaller than" here can be understood as the elastic member 14 being able to move along the inner wall surface of the mating section 123 and / or the cavity portion 119. In some embodiments, the inner diameter of the mating section 123 is equal to the inner diameter of the cavity portion 119. During the expansion and contraction process, the elastic member 14 is guided and radially limited by the inner wall surface of the mating section 123 and / or the cavity portion 119. On the one hand, the deflection of the elastic member 14 is reduced. On the other hand, when the outer diameter of the joint body 11 remains unchanged, it helps to increase the outer diameter of the elastic member 14, thereby relatively improving the actuation stability of the elastic member 14.

[0032] like Figure 3 and Figure 6 The connector body 11 includes a second interface portion 112, and the first connecting portion 12 is connected to the connector body 11 through the second interface portion 112. The inner side wall of the second interface portion 112 is provided with an internal thread, and correspondingly, the outer peripheral wall of the first connecting portion 12 is provided with an external thread. The first connecting portion 12 can be connected to the second interface portion 112 through a threaded connection. Furthermore, the second interface portion 112 includes a third limiting portion 1121, and the third limiting portion 1121 is used to limit the insertion depth of the first connecting portion 12. Furthermore, after the first connecting portion 12 and the connector body 11 are fixed by threaded connection, a welding process is used to make the two more firmly fixed and achieve further sealing. Specifically, laser welding can be used to fix the first interface portion 112 and the first connecting portion 12 at the joint surface. In some embodiments, during the assembly of the connector assembly 10, the sealing member 15, the valve core 13, and the elastic member 14 are first installed into the accommodating cavity 117, and then the first connecting pipe portion 12 is screwed in so that the first connecting pipe portion 12 and the connector body 11 are relatively fixed, and then the first connecting pipe portion 12 and the connector body 11 are welded at the joint surface by laser welding. Due to the elastic force of the elastic member 14, the relative positioning of the first connecting pipe portion 12 and the connector body 11 is more difficult, which increases the difficulty of laser welding. The first connecting pipe portion 12 and the connector body 11 are pre-fixed by threaded connection to facilitate subsequent laser welding.

[0033] like Figure 2The connector body 11 includes a recessed portion 116, which is arranged between the cavity portion 119 and the first interface portion 118. The outer diameter of the recessed portion 116 is smaller than the outer diameter of the first interface portion 118. When the connector assembly 10 is used as a male connector and docked with a female connector in the air-conditioning pipeline, the clip of the female connector is limited to the recessed portion 116, thereby realizing docking and locking of the male connector and the female connector.

[0034] like Figure 1 and Figure 2 The connector assembly 10 includes a fixing portion 111, which includes a connecting hole 1111. When the connector assembly 10 is connected to the pipeline of the outdoor unit, the connecting assembly 10 is fixed to the sheet metal of the outdoor unit through the fixing portion 111. Since the connector assembly 10 can achieve the effect of cutting off and conducting the pipeline, and can also serve as a male head and a female head of the air-conditioning pipeline to achieve the function of quick plug-in, by directly connecting the connector assembly 10 to the pipeline of the outdoor unit, the shut-off valve is saved and the purpose of quick plug-in can also be achieved.

[0035] like Figure 1 、 Figure 7 and Figure 8 The present application also provides a pipe fitting connection device, which includes the joint assembly 10 and the connection assembly 20 as described above. The connection assembly 20 includes a clamping member 28, a connection body 27, a core shaft 22, a sliding assembly 23 and a second connecting portion 29. One end of the second connecting portion 29 is connected to the connection body 27, and the other end is connected to the air conditioning pipe 100. The sliding assembly 23 is arranged between the connection body 27 and the core shaft 22. The sliding assembly 23 can move relative to the connection body 27 and the core shaft 22 along the axial direction of the connection assembly 20. Further, the sliding assembly 23 The connecting member 20 includes a sleeve 231 and a bushing 232. At least a portion of the bushing 232 is sleeved on the outer circumference of the sleeve 231. The sleeve 231 is sleeved on the outer circumference of the core shaft 22. A second channel 233 is defined between the sleeve 231 and the core shaft 22. A hole 271 is defined on one side of the connecting body 27 near the free end. The hole 271 penetrates the wall of the connecting body 27. The clamping member 28 penetrates the hole 271. In other words, the width of the clamping member 28 in the radial direction of the connecting assembly 20 is greater than the wall thickness of the connecting body 27. The clamping member 28 can move in the radial direction of the connecting assembly 20 within the hole 271. When the joint assembly 10 and the connecting assembly 20 are connected, the end face of the bushing 231 abuts the end face of the first interface portion 118, the core shaft 22 abuts the valve core 13, and the clip 28 moves radially along the connecting assembly 20 toward the side of the core shaft 22 and is limited to the recessed portion 116, that is, part of the clip 28 is located in the recessed portion 116, and the other part of the clip 28 is located in the hole portion 271, thereby realizing the connection between the joint assembly 10 and the connecting assembly 20.

[0036] like Figure 7Furthermore, the bushing 232 includes a first locking portion 2321, and correspondingly, the sleeve 231, the sleeve 231 includes a second locking portion 2311. When the sleeve 231 moves a certain distance axially to the right side of the figure along the connecting component 20, the first locking portion 2321 and the second locking portion 2311 abut against each other. As the bushing 232 continues to move to the right, the sleeve 231 is also driven to move to the right, and the core shaft 22 located in the sleeve 231 protrudes from the sleeve 231, and the second channel 233 between the sleeve 231 and the core shaft 22 is opened and connected to the gap 17, so that the refrigerant flowing out through the gap 17 of the joint assembly 10 flows into the second channel 233, and then flows into the pipe 100 connected to the second connecting pipe portion 29, thereby realizing quick connection of the pipeline.

[0037] Furthermore, the outer diameter of the free end of the sleeve 231 is equal to the outer diameter of the valve core body 131. When the joint assembly 10 and the connecting assembly 20 are connected, the sleeve 231 and the first interface portion 118 are sealed through the sealing member 15 to ensure the sealing performance of the pipeline connection device after connection.

[0038] like Figure 1 、 Figure 7 and Figure 8 Furthermore, the connection assembly 20 includes a cover assembly 21, which is sleeved on the outer peripheral side of the connection body 27. At least part of the cover assembly 21 can move axially along the connection assembly 20 relative to the connection body 27, and the clamping member 28 abuts the cover assembly 21. Specifically, the cover assembly 21 includes a cover 211 and a spring 212. One end of the spring 212 abuts the cover 211, and the other end abuts the connection body 27. The cover 211 includes a pushing portion 2111, as shown in FIG. Figure 8 Before the connecting assembly 20 is connected to the joint assembly 10, the pushing portion 2111 pushes against the clamping member 28, that is, in a plane perpendicular to the axis of the connecting assembly 20, the projection of the clamping member 28 and the projection of the pushing portion 2111 partially overlap; when the joint assembly 10 and the connecting assembly 20 are connected, the bushing 232 moves to the right side in the figure until the recessed portion 116 of the joint body 11 is located in the radial direction of the clamping member 28, and under the push of the pushing portion 2111, the clamping member 28 moves along the hole portion 271 toward the recessed portion 116 and is limited in the recessed portion 116, so that part of the clamping member 28 is located in the hole portion 271, and part of the clamping portion 28 is located in the recessed portion 116, thereby quickly connecting the joint assembly 10 and the connecting assembly 20.

[0039] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A joint assembly, characterized in that: The connector assembly (10) comprises a connector body (11) and a first connecting pipe portion (12), wherein the first connecting pipe portion (12) and the connector body (11) are fixedly connected, and the first connecting pipe portion (12) is provided with a first passage (121) extending through the connector body along its axial direction. The connector assembly (10) comprises an accommodating cavity (117), and the first passage (121) is connected to the accommodating cavity (117). The connector assembly (10) comprises a valve core (13) and an elastic member (14), and the valve core (13) is located in the accommodating cavity (117). The valve core (13) includes a valve core body (131) and an extension portion (132), wherein the extension portion (132) extends from one end of the valve core body (131) toward one side of the elastic member (14), and one end of the elastic member (14) abuts against the extension portion (132), and the other end abuts against the first connecting pipe portion (12) or the joint body (11); the joint assembly (10) includes a first working state and a second working state, wherein in the first working state, the outer peripheral wall of the valve core body (131) and the inner side wall of the joint body (11) are sealed together, and in the second working state, a gap (17) is provided between the outer peripheral wall of the valve core body (131) and the inner side wall of the joint body (11).

2. The joint assembly according to claim 1, wherein: The extension portion (132) includes a communication port (1321), the communication port (1321) is arranged along the circumference of the valve core (13), and the communication port (1321) is connected to the accommodating cavity (117); The connector body (11) includes a first interface portion (118) and a cavity portion (119), the inner diameter of the cavity portion (119) is smaller than the inner diameter of the first interface portion (118), the outer diameter of the valve core body (131) is smaller than the outer diameter of the extension portion (132), and the outer diameter of the valve core body (131) is smaller than the inner diameter of the cavity portion (119). In the second working state, the valve core body (131) is located in the cavity portion (119), and the gap (17) is formed between the valve core body (131) and the cavity portion (119), and the communication port (1321) is connected to the gap (17).

3. The joint assembly according to claim 1 or 2, characterized in that: The connector body (11) includes a first interface portion (118) and a cavity portion (119), wherein the first interface portion (118) is located at one end of the connector body (11) away from the first connecting pipe portion (12), and the first interface portion (118) includes a receiving groove (1181), and the receiving groove (1181) is arranged along the circumference of the first interface portion (118). The connector assembly (10) includes a sealing member (15), and at least part of the sealing member (15) is located in the receiving groove (1181). In the first working state, along the radial direction of the sealing member (15), one side of the sealing member (15) abuts against the groove wall of the receiving groove (1181), and the other side abuts against the outer peripheral wall of the valve core (13).

4. The joint assembly according to claim 3, wherein: The first connecting pipe portion (12) includes a pipe connecting section (122) and a matching section (123), the pipe connecting section (122) is connected to the pipeline of the outdoor unit, the first connecting pipe portion (12) is connected to the joint body (11) through the matching section (123), the first connecting pipe portion (12) includes a second limiting portion (124), the second limiting portion (124) is located between the connecting section (122) and the matching section (123), the inner diameter of the matching section (123) is larger than the inner diameter of the second limiting portion (124), one end of the elastic member (14) abuts against the second limiting portion (124), and the outer diameter of the elastic member (14) is slightly smaller than the inner diameter of the matching section (123) and / or the cavity portion (119).

5. The connector assembly according to any one of claims 2 and 4, characterized in that: The joint body (11) comprises a recessed portion (116), which is arranged between the cavity portion (119) and the first interface portion (118), and an outer diameter of the recessed portion (116) is smaller than an outer diameter of the first interface portion (118).

6. The joint assembly according to claim 3, wherein: The joint body (11) includes a second interface portion (112), an inner side wall of the second interface portion (112) is provided with an internal thread, an outer peripheral wall of the first connecting portion (12) is provided with an external thread, the first connecting portion (12) and the second interface portion (112) are connected by threads, and the first connecting portion (12) and the joint body (11) are fixed by threads and welding; The joint body (11) comprises a fixing portion (111), the fixing portion (111) protrudes from the cavity portion (119), and the fixing portion (111) comprises a connecting hole (1111).

7. A pipe fitting connection device, comprising a connector assembly (10) and a connection assembly (20) that can be plugged in and matched, characterized in that: The joint assembly (10) comprises a joint body (11), a valve core (13) and a first connecting portion (12), wherein the first connecting portion (12) and the joint body (11) are fixedly connected, and the joint body (11) comprises a recessed portion (116); The connecting assembly (20) comprises a clamping member (28), a connecting body (27), a core shaft (22), a sliding assembly (23) and a second connecting pipe portion (29), wherein the second connecting pipe portion (29) is fixedly connected to the connecting body (27), the sliding assembly (23) is arranged between the connecting body (27) and the core shaft (22), a second channel (233) is provided between the sliding assembly (23) and the core shaft (22), and the sliding assembly (23) can move relative to the connecting body (27) and the core shaft (22) along the axial direction of the connecting assembly (20); When the connector assembly (10) and the connection assembly (20) are mated, part of the clamping member (28) can be located in the recessed portion (116), a gap (17) is provided between the outer peripheral wall of the valve core (13) and the inner side wall of the connector body (11), and the second channel (233) is in communication with the gap (17).

8. The pipe fitting connection device according to claim 7, characterized in that: The sliding assembly (23) includes a sleeve (231) and a bushing (232), at least a portion of the bushing (232) is sleeved on the outer peripheral side of the sleeve (231), the sleeve (231) is sleeved on the outer peripheral side of the core shaft (22), and the second channel (233) is provided between the sleeve (231) and the core shaft (22); When the joint assembly (10) and the connecting assembly (20) are mated, the bushing (232) drives the sleeve (231) to move toward a side away from the joint assembly (10), so that the core shaft (22) located inside the sleeve (231) protrudes from the sleeve (231), and the second channel (233) between the sleeve (231) and the core shaft (22) is opened and communicated with the gap (17).

9. The pipe fitting connection device according to claim 7 or 8, characterized in that: A hole portion (271) is provided at the free end of the connecting body (27), and the hole portion (271) passes through the wall of the connecting body (27). Part of the clamping member (28) is located in the recessed portion (116), and another part of the clamping member (28) is located in the hole portion (271).

10. The pipe fitting connection device according to claim 7, characterized in that: The joint assembly (10) includes an elastic member (14), the joint body (11) includes a cavity portion (119), a recessed portion (116) and a first interface portion (118), the recessed portion (116) is arranged between the cavity portion (119) and the first interface portion (118), the valve core (13) includes a valve core body (131) and an extension portion (132), the extension portion (132) extends from one end of the valve core body (131) toward one side of the elastic member (14), the elastic member (14) abuts against the extension portion (132), the extension portion (132) includes a communication port (1321), and the communication port (1321) is arranged along the circumference of the valve core (13), and the sliding assembly (23) includes a sleeve (231) and a bushing (232); When the joint assembly (10) and the connecting assembly (20) are mated, the core shaft (22) abuts against the valve core body (131), the valve core body (131) is located inside the cavity portion (119), the gap (17) is formed between the valve core body (131) and the cavity portion (119), the communication port (1321) communicates with the gap (17), the bushing (232) abuts against the end surface of the first interface portion (118), and the bushing (232) moves relative to the core shaft (22) toward a side away from the joint assembly (10), so that the second channel (233) and the gap (17) are connected; The outer diameter of the free end of the sleeve (231) is equal to the outer diameter of the valve core body (131); The connecting assembly (20) includes a cover assembly (21), which is sleeved on the outer peripheral side of the connecting body (27). At least a portion of the cover assembly (21) can move axially along the connecting assembly (20) relative to the connecting body (27), and the clamping member (28) abuts against the cover assembly (21).

11. The pipe fitting connection device according to claim 8, characterized in that: The connector assembly (10) includes an elastic member (14), the connector body (11) includes a cavity portion (119), a recessed portion (116) and a first interface portion (118), the recessed portion (116) is arranged between the cavity portion (119) and the first interface portion (118), the valve core (13) includes a valve core body (131) and an extension portion (132), the extension portion (132) extends from one end of the valve core body (131) toward one side of the elastic member (14), the elastic member (14) abuts against the extension portion (132), the extension portion (132) includes a communication port (1321), and the communication port (1321) is arranged along the circumference of the valve core (13); When the joint assembly (10) and the connecting assembly (20) are mated, the core shaft (22) abuts against the valve core body (131), the valve core body (131) is located inside the cavity portion (119), the gap (17) is formed between the valve core body (131) and the cavity portion (119), the communication port (1321) communicates with the gap (17), the bushing (232) abuts against the end surface of the first interface portion (118), and the bushing (232) moves relative to the core shaft (22) toward a side away from the joint assembly (10), so that the second channel (233) and the gap (17) are connected; The outer diameter of the free end of the sleeve (231) is equal to the outer diameter of the valve core body (131); The connecting assembly (20) includes a cover assembly (21), which is sleeved on the outer peripheral side of the connecting body (27). At least a portion of the cover assembly (21) can move axially along the connecting assembly (20) relative to the connecting body (27), and the clamping member (28) abuts against the cover assembly (21).

12. The pipe fitting connection device according to claim 7 or 8, characterized in that: A hole portion (271) is formed at the free end of the connecting body (27), and the hole portion (271) passes through the wall of the connecting body (27); part of the clamping member (28) is located in the recessed portion (116), and another part of the clamping member (28) is located in the hole portion (271); The joint body (11) includes a cavity portion (119), a recessed portion (116) and a first interface portion (118), wherein the recessed portion (116) is arranged between the cavity portion (119) and the first interface portion (118); the valve core (13) includes a valve core body (131) and an extension portion (132), wherein the extension portion (132) extends from one end of the valve core body (131) toward a side of the elastic member (14); the joint assembly (10) includes an elastic member (14), wherein the elastic member (14) abuts against the extension portion (132), and the extension portion (132) includes a communication port (1321), wherein the communication port (1321) is arranged along the circumference of the valve core (13); and the sliding assembly (23) includes a sleeve (231) and a bushing (232); When the joint assembly (10) and the connecting assembly (20) are mated, the core shaft (22) abuts against the valve core body (131), the valve core body (131) is located inside the cavity portion (119), the gap (17) is formed between the valve core body (131) and the cavity portion (119), the communication port (1321) communicates with the gap (17), the bushing (232) abuts against the end surface of the first interface portion (118), and the bushing (232) moves relative to the core shaft (22) toward a side away from the joint assembly (10), so that the second channel (233) and the gap (17) are connected; The outer diameter of the free end of the sleeve (231) is equal to the outer diameter of the valve core body (131); The connecting assembly (20) includes a cover assembly (21), which is sleeved on the outer peripheral side of the connecting body (27). At least a portion of the cover assembly (21) can move axially along the connecting assembly (20) relative to the connecting body (27), and the clamping member (28) abuts against the cover assembly (21).

13. The pipe fitting connection device according to claim 12, characterized in that: The joint body (11) comprises a recessed portion (116), which is arranged between the cavity portion (119) and the first interface portion (118), and an outer diameter of the recessed portion (116) is smaller than an outer diameter of the first interface portion (118).

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