Coupling device

Abstract

A coupling device, comprising a male coupling and a female coupling. The male coupling comprises a coupling body and a core body located in the coupling body, and the core body comprises a core body head; the female coupling comprises a core rod, the core rod comprises a core rod head, and the core rod is provided with a core rod cavity and a through hole; and the coupling device is provided with a circulation channel S, part of the inner wall of the coupling body forms part of the wall surface of the circulation channel S, and the outer peripheral wall of the core body head and the outer peripheral wall of the core rod head form at least another part of the wall surface of the circulation channel S; when the male coupling and the female coupling are in a connected state, the core body head and the core rod head abut against each other, and the circulation channel S, the through hole, and the core rod cavity are communicated with each other.

Description

A joint device

[0001] The present application claims priority to the Chinese patent application No. 2024106234374, filed on May 20, 2024, and entitled "A joint device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of refrigeration control, in particular to a joint device. BACKGROUND

[0003] A household air conditioner includes an indoor unit and an outdoor unit, and the two units are connected through a connecting pipe. In order to achieve fast disassembly and assembly at the market end, a quick joint is usually used for connection. The quick joint includes a first joint and a second joint. The first joint and the second joint are connected through a nut. The first joint includes a top rod and a bushing. The second joint includes a valve core. The top rod pushes the valve core to separate the valve core from a sealing cone surface of the second joint. At the same time, a front end step of the second joint pushes the bushing to separate the bushing and the top rod. The first joint and the second joint are simultaneously opened and connected to each other to form a medium passage. After the two joints are connected, there are many product parts, and there are many flow passage throttling factors, such as the bushing, a stopper, and a base, which all need to be provided with a plurality of measuring holes. The fluid changes the flow direction after passing through each part, and the flow resistance is large, which corresponds to a large pressure loss. SUMMARY

[0004] The present application aims to provide a joint device with a new structure, which can relatively reduce the flow resistance and the pressure loss.

[0005] The present application provides a joint device, which includes a male joint and a female joint. The male joint and the female joint are detachably connected. The male joint includes a joint body and a core body located in the joint body. The core body includes a core body head. The female joint includes a core rod and a bushing sleeved on an outer circumferential part of the core rod. The core rod includes a core body head, a core rod cavity, and a through hole. The through hole penetrates the inner and outer surfaces of the core rod. The joint device is provided with a flow passage S. Part of the inner wall of the joint body forms part of the wall surface of the flow passage S. The outer circumferential wall of the core body head and the outer circumferential wall of the core rod head form at least another part of the wall surface of the flow passage S.

[0006] When the male joint and the female joint are in a connected state, the core body head abuts against the core rod head, the end surface part of the joint body abuts against the bushing abutting part of the bushing, one side part of the bushing is in sealing cooperation with the core rod, and the other side part of the bushing is in sealing cooperation with the joint body. The flow passage S, the through hole, and the core rod cavity are connected.

[0007] The application optimizes the structure of the joint device, so that the female joint comprises a core rod, the core rod is provided with a through hole, the joint device is provided with a flow channel S, part of the inner wall of the joint body forms part of the wall surface of the flow channel S, the outer peripheral wall of the core body head and the outer peripheral wall of the core rod head form at least another part of the wall surface of the flow channel S, the path for the medium flow is formed by optimizing the structure of the parts themselves, and in the connected state of the male joint and the female joint, the medium can enter from the male joint or the female joint in the actual application scene, so as to realize the communication among the flow channel S, the through hole and the core rod cavity, the blockage is relatively reduced, the flow resistance of the fluid is relatively reduced, and the pressure loss of the fluid is relatively reduced.

[0008] The application also provides a joint device, which comprises a female joint, the female joint comprises a core rod, a sleeve, a bushing, a second elastic member and a connecting nut, the core rod comprises a connecting part, the connecting part is fixedly connected with the sleeve or is an integral structure, the bushing is sleeved on the outer peripheral part of the core rod, the bushing is sealingly connected with the core rod and can axially displace relative to the core rod, part of the bushing is located between the sleeve and the core rod, the second elastic member is sleeved on the outer peripheral part of the core rod and directly or indirectly abuts between the bushing and the connecting part, the connecting nut is sleeved on the outer peripheral part of the sleeve, and the core rod is provided with a through hole penetrating through the inner and outer surfaces of the core rod, the through hole is in communication with the core rod cavity of the core rod.

[0009] The application optimizes the structure of the female joint of the joint device, which comprises a core rod, a sleeve, a bushing, a second elastic member and a connecting nut, the core rod is provided with a through hole penetrating through the inner and outer surfaces of the core rod, the through hole is in communication with the core rod cavity of the core rod, the path for the medium flow is formed by optimizing the structure of the parts themselves, the blockage can be relatively reduced, the flow resistance of the fluid can be relatively reduced, and the pressure loss of the fluid can be relatively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a perspective view of the male and female joints of the joint device in a separated state according to the application;

[0011] Fig. 2 is a sectional view of the overall structure of the male joint of the joint device according to the application;

[0012] Fig. 3 is a sectional view of the overall structure of the female joint of the joint device according to the application;

[0013] Fig. 4 is a perspective view of the core body of the joint device according to the application;

[0014] Fig. 5 is a perspective view of the female joint of the joint device according to the application;

[0015] Fig. 6 is a sectional view of the male and female joints of the joint device in a connected state according to the application.

[0016] Reference signs: male connector 10, connector nut 11, abutting portion 111, first clamping portion 112, connector body 12, connector body inner cavity 12a, sub-cavity 121a, base 121, end face portion 1211, extension portion 122, extension portion end face 122a, core body 13, first sealing fitting portion 131, first abutting portion 132, support leg 133, gasket 14, first elastic member 15, sealing member 16, fourth sealing member 17, external thread portion 18, ramp portion 19, second internal thread portion 20; female connector 20, core rod 21, core rod cavity 21a, second sealing fitting portion 211, second abutting portion 212, through hole 213, connecting portion 214, core rod step portion 215, third sealing fitting portion 216; sleeve 22, first abutting portion 221, second abutting portion 222, third abutting portion 223; bushing 23, bushing abutting portion 231, bushing abutting portion 232, bushing step portion 233; first installation groove 11, second installation groove 12, third installation groove 13, first sealing member 1A, second sealing member 2A, third sealing member 3A, second elastic member 25, connecting nut 26, first internal thread portion 261, nut abutting portion 262, second clamping portion 263, connector 200, inner cavity 201, flow-through passage S. DETAILED DESCRIPTION

[0017] In order for those skilled in the art to better understand the technical solutions provided by the present application, the technical solutions of the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0018] Please refer to FIG. 1-FIG. 3, FIG. 1 shows a perspective view of the male and female connectors of the connector device provided by the present application in a separated state, FIG. 2 shows a cross-sectional view of the overall structure of the male connector of the connector device provided by the present application, and FIG. 3 shows a cross-sectional view of the overall structure of the female connector of the connector device provided by the present application.

[0019] The connector device comprises a male connector 10 and a female connector 20.

[0020] The male connector 10 comprises a connector nut 11 and a connector body 12, part of the connector nut 11 is located in the connector body 12 and can be fixedly connected with the connector body 12 by welding or the like. The connector body 12 is provided with an external thread portion 18 which is threadedly fitted with a connecting nut 26 of the female connector 20. The connector nut 11 comprises an abutting portion 111, a second internal thread portion 20 and a first clamping portion 112, wherein the second internal thread portion 20 is used for threadedly fitting with an external thread portion of a stop valve, and the first clamping portion 112 comprises a hexagonal face portion structure which is used for cooperating with an external wrench to realize the thread tightening cooperation with the stop valve. The connector nut 11 is further provided with a fourth sealing member 17 which is used for abutting cooperation with a connecting end of the stop valve to prevent leakage of refrigerant.

[0021] The male connector 10 further comprises a core 13, a gasket 14, a first elastic member 15 and a sealing member 16. The core 13, the gasket 14 and the sealing member 16 are located in the inner cavity 12a of the connector body 12, and the first elastic member 15 is at least partially located in the inner cavity 12a. Referring to FIG. 4, and in combination with FIG. 2, the core 13 comprises a core head and support feet 133 capable of being in sliding fit with the connector body 12, and a sub-flow passage is formed between adjacent two support feet 133. One end of the first elastic member 15 directly abuts against the abutting portion 111, and the other end abuts against the support feet 133 through the gasket 14. Specifically, one side of the gasket 14 abuts against the support feet 133, and the other side abuts against the first elastic member 15. The core head comprises a first sealing fit portion 131 and a first abutting portion 132. The connector body 12 is provided with a mounting groove, and the sealing member 16 is at least partially limited in the mounting groove, and the sealing member 16 is in sealing fit with the first sealing fit portion 131, and the sealing member 16 is in sealing fit with the connector body 12; or, the core head can also be provided with a mounting groove, and the sealing member 16 is also at least partially limited in the mounting groove. In summary, when the male connector 10 and the female connector 20 are in a separated state, the sealing member 16 can realize the sealing fit between the core and the connector body.

[0022] The connector body 12 comprises a base 121 and an extension 122 protruding from an end face 1211 of the base 121. The connector body 12 is further provided with a slope portion 19, and a tapered surface of the core 13 abuts against the slope portion 19. The core 13 can approach or move away from the slope portion 19, and through the direct abutment of one end of the first elastic member 15 against the abutting portion 111 and the above structural design, when the male connector 10 and the female connector 20 are connected, the refrigerant flowing from the cut-off valve side into the inner cavity of the connector nut 11 can directly pass through the inner space of the first elastic member 15 and flow outwards through the sub-flow passage, which can greatly reduce the use of stopper and other components, and relatively reduce the refrigerant flow resistance and pressure loss.

[0023] The inner cavity 12a comprises a sub-cavity 121a. When the male connector 10 and the female connector 20 are in a separated state, the sub-cavity 121a is located on one side of the first abutting portion 132.

[0024] The structure of the female joint 20 will be described below with reference to FIG. 3, FIG. 5 in combination with FIG. 2. The female joint 20 includes a core rod 21, a sleeve 22, a bushing 23, a second elastic member 25, and a connecting nut 26. The core rod 21 includes a connecting portion 214. The sleeve 22 is located at the outer peripheral portion of the core rod 21, and is fixedly connected with the connecting portion 214 or is an integral structure. The sleeve 22 can be fixedly connected with the outer side portion of the connecting portion 214 by welding or the like, and the inner side portion of the connecting portion 214 can be connected with an external connecting member. For example, the external connecting member can be a connecting pipe or a threaded member. The inner side portion can be fixedly connected with the connecting pipe by welding, or the inner side portion can be threadedly connected with the threaded member. The bushing 23 is sleeved on the outer peripheral portion of the core rod 21, and part of the bushing 23 is located between the sleeve 22 and the core rod 21. The second elastic member 25 directly or indirectly abuts between the core rod 21 and the bushing 23. The connecting nut 26 is sleeved on the outer peripheral portion of the sleeve 22. The core rod 21 includes a core rod head, and the core rod head includes a second sealing cooperation portion 211 and a second abutting portion 212. In the connected state of the male joint and the female joint, the second abutting portion 212 abuts against the first abutting portion 132. The core body 13 is provided with a core rod cavity 21a and a through hole 213. The through hole 213 penetrates the inner and outer surfaces of the core body 13, and the through hole 213 and the core rod cavity 21a are connected in communication. When the external connecting member is connected with the connecting portion of the female joint 20, the through hole 213, the core rod cavity 21a, and the inner cavity of the external connecting member are connected in communication. For example, when the external connecting member is the connecting pipe 200, the through hole 213, the core rod cavity 21a, and the inner cavity 201 are connected in communication. When the external connecting member is a threaded member, the through hole, the core rod cavity, and the inner cavity of the threaded member are connected in communication. The passage for the flow of refrigerant is formed by the optimized design of the structure of the core rod itself, which can reduce the use of parts and accordingly reduce the flow resistance and the pressure loss of the refrigerant. The core rod 21 is provided with a core rod step portion 215 and a third sealing cooperation portion 216. The second sealing cooperation portion 211 and the third sealing cooperation portion 216 are located at different sides of the through hole 213.

[0025] In this embodiment, the inner peripheral portion of the bushing 23 is provided with a first installation groove 11 and a second installation groove 12. The first installation groove 11 and the second installation groove 12 are recessed inwardly from the inner peripheral wall of the bushing 23. The female joint 20 includes a first sealing member 1A and a second sealing member 2A. The first sealing member 1A is at least partially limited in the first installation groove 11, and abuts against the second sealing cooperation portion 211 and the bushing 23 at the same time. The second sealing member 2A is at least partially limited in the second installation groove 12, and abuts against the third sealing cooperation portion 216 and the bushing 23 at the same time. It should be noted that the first installation groove 11 and the second installation groove 12 can also be provided on the core rod 21, and the first installation groove 11 and the second installation groove 12 can be recessed inwardly from the outer peripheral wall of the core rod 21.

[0026] The outer peripheral wall of the bushing 23 is further provided with a third mounting groove 13 in the embodiment. The female connector 20 comprises a third sealing member 3A which is at least partially limited in the third mounting groove 13. When the male and female connectors are in the connected state, the third sealing member 3A abuts against the connector body 12 and the third sealing member 3A abuts against the bushing 23 to achieve the sealing fit between the connector body 12 and the bushing 23. It should be noted that the third mounting groove 13 can be formed on the connector body 12 and recessed inwardly from the inner wall of the connector body 12, and the sealing fit between the two can also be achieved.

[0027] In the separated state of the male and female connectors, one end of the second elastic member 25 abuts against the core rod step portion 215 and the other end abuts against the bushing step portion 233. The bushing 23 further comprises a bushing abutting top portion 231 and a bushing abutting portion 232. When the male and female connectors are connected, the bushing abutting top portion 231 can abut against the end face portion 1211 and axially displace to the right to compress the second elastic member 25 under the threaded cooperation. The sleeve 22 comprises a first abutting portion 221, a second abutting portion 222 and a third abutting portion 223, and the connecting nut 26 comprises a first internal thread portion 261, a nut abutting portion 262 and a second clamping portion 263. In the separated state of the male and female connectors, the nut abutting portion 262 abuts against the first abutting portion 221 and the bushing abutting portion 232 abuts against the second abutting portion 222, and the first internal thread portion 261 can be threadedly fitted with the external thread portion 18. The second clamping portion 263 comprises a hexagonal face portion structure which is used to cooperate with an external wrench to facilitate the threaded fit-up of the male and female connectors.

[0028] In the connected state, the first internal thread part 261 is threadedly engaged with the external thread part 18, the extension part end face 122a of the extension part 122 is hard sealedly engaged with the third abutting part 223 to cooperate with other soft sealing parts to prevent leakage of the medium; the end face part 1211 abuts against the bushing abutting part 231, the bushing abutting part 232 is away from the second abutting part 222, the second elastic member 25 is further compressed; the nut abutting part 262 abuts against the first abutting part 221; the third sealing member 3A abuts between the joint body 12 and the bushing 23, the sealing member 16 abuts between the joint body and the third sealing part 216, the first sealing member 1A abuts between the third sealing part 216 and the bushing 23, and the second sealing member 2A abuts between the third sealing part 216 and the bushing 23. It should be noted that the first sealing part 131 in the present application refers to the abutting face part of the core body 13 for sealing cooperation with the sealing member 16, and the second sealing part 211 and the third sealing part 216 refer to the abutting face parts for sealing cooperation with the first sealing member 1A and the second sealing member 2A, respectively. In the connected state, the core body head abuts against the core rod head, specifically, the first abutting part 132 abuts against the second abutting part 212, and the first elastic member 15 is further compressed. The joint device has a flow passage S, part of the inner wall of the joint body 12 forms part of the wall of the flow passage S, and the outer wall of the core body head and the outer wall of the core rod head form at least another part of the wall of the flow passage S. When the medium enters from the joint nut 11 side, the medium passes through the inner cavity of the joint nut 11, directly passes through the inner space of the first elastic member 15, enters the flow passage S through the sub-flow passage of the core body 13, and directly enters the core rod cavity 21a through the through hole 213, and then flows out through the inner cavity of the external connecting member. In this process, by optimizing the structure of the male and female joint, by improving the structure of the parts, and by forming a channel for the flow of the refrigerant through the structure of the parts themselves, the number of parts is reduced, the flow resistance in the refrigerant flow process can be significantly reduced, the pressure loss is reduced, and the product performance of the joint device is improved.

[0029] The present application provides a joint device, which comprises a male joint 10 and a female joint 20. The male joint 10 and the female joint 20 are detachably connected. The male joint 10 comprises a joint body 12 and a core body 13 located in the joint body 12, and the core body 13 comprises a core body head. The female joint 20 comprises a core rod 21 and a bushing 23 sleeved on the outer peripheral part of the core rod 21, and the core rod 21 comprises a core rod head, a core rod cavity 21a, and a through hole 213 penetrating the inner and outer surfaces of the core rod 21. The joint device is provided with a flow passage S. Part of the inner wall of the joint body 12 forms part of the wall of the flow passage S, and the outer wall of the core body head and the outer wall of the core rod head form at least another part of the wall of the flow passage S.

[0030] When the male connector 10 and the female connector 20 are in the connected state, the core head abuts against the core rod head, the end face part 1211 of the connector body 12 abuts against the bushing abutting part 231 of the bushing 23, one side part of the bushing 23 is in sealing cooperation with the core rod 21, and the other side part of the bushing 23 is in sealing cooperation with the connector body, and the flow passage S, the through hole 213 and the core rod cavity 21a are in communication.

[0031] The application optimizes the structure of the connector device, and the female connector 20 comprises the core rod 21, the core rod 21 is provided with the through hole 213, and the connector device is provided with the flow passage S, part of the inner wall of the connector body forms part of the wall surface of the flow passage S, and the outer peripheral wall of the core head and the outer peripheral wall of the core rod head form at least another part of the wall surface of the flow passage S. The path for the medium flow is formed by optimizing the structure of the parts themselves. In the connected state of the male and female connectors, in the actual application scene, the medium enters from the male connector 10 or the female connector 20 side, and the communication among the flow passage S, the through hole 213 and the core rod cavity 21a can be realized, the flow resistance of the fluid can be relatively reduced, and the pressure loss of the fluid can be relatively reduced.

[0032] The application also provides a connector device comprising a female connector 20. The female connector 20 comprises a core rod 21, a sleeve 22, a bushing 23, a second elastic member 25 and a connecting nut 26. The core rod 21 comprises a connecting part 214 which is fixedly connected with the sleeve 22 or is an integral structure. The bushing 23 is sleeved on the outer peripheral part of the core rod 21, is in sealing cooperation with the core rod 21 and can axially displace relative to the core rod 21. Part of the bushing 23 is located between the sleeve 22 and the core rod 21. The second elastic member 25 is sleeved on the outer peripheral part of the core rod 21 and directly or indirectly abuts between the bushing 23 and the connecting part 214. The connecting nut 26 is sleeved on the outer peripheral part of the sleeve 22. The core rod 21 is provided with the through hole 213 which penetrates through the inner and outer surfaces of the core rod 21 and is in communication with the core rod cavity 21a of the core rod 21.

[0033] The application optimizes the structure of the female connector 20 of the connector device, and the female connector 20 comprises the core rod 21, the sleeve 22, the bushing 23, the second elastic member 25 and the connecting nut 26. The core rod 21 is provided with the through hole 213 which penetrates through the inner and outer surfaces of the core rod 21 and is in communication with the core rod cavity 21a of the core rod 21. The path for the medium flow is formed by optimizing the structure of the parts themselves, the flow resistance of the fluid can be relatively reduced, and the pressure loss of the fluid can be relatively reduced.

[0034] It should be noted that the above, below, left, right and other orientation terms mentioned herein are based on the drawings as a reference, introduced for ease of description; and the ordinal numbers in the component names, such as 'first','second', etc., are also introduced for ease of description, and do not mean any order of the components. In addition, since the functions of some parts of the components provided by the above embodiments are the same, the specification uses a unified naming method for these parts. The above provides a detailed introduction to the joint device provided by the related technical solutions, and the specific embodiments are applied in this paper. The above description of the embodiments is only used to help understand the method and its core idea of the application, and does not limit the application in any form.

Claims

1. A joint device, characterized in that The joint device comprises a male joint and a female joint which are detachably connected, the male joint comprises a joint body and a core body in the joint body, the core body comprises a core body head, the female joint comprises a core rod and a bushing sleeved on the outer peripheral part of the core rod, the core rod comprises a core body head, the core rod is provided with a core rod cavity and a through hole, the through hole penetrates the inner and outer surfaces of the core rod, the joint device is provided with a flow passage S, part of the inner wall of the joint body forms part of the wall surface of the flow passage S, the outer peripheral wall of the core body head and the outer peripheral wall of the core rod head form at least another part of the wall surface of the flow passage S; When the male joint and the female joint are in the connected state, the core body head abuts against the core rod head, the end face part of the joint body abuts against the bushing abutting part of the bushing, one side part of the bushing is in sealing cooperation with the core rod, the other side part of the bushing is in sealing cooperation with the joint body, the flow passage S, the through hole and the core rod cavity are in communication.

2. The joint device according to claim 1, characterized in that The core rod comprises a connecting part which is directly connected with an external connecting piece, the flow passage S, the through hole, the core rod cavity and the inner cavity of the external connecting piece are in communication.

3. The joint device according to claim 2, characterized in that The external connecting piece comprises a connecting pipe, the connecting part is welded and fixed with the connecting pipe, the connecting pipe is provided with an inner cavity, the flow passage S, the through hole, the core rod cavity and the inner cavity are in communication.

4. The joint device of claim 2, wherein The external connecting piece comprises a threaded piece, the connecting part is in threaded cooperation with the threaded piece, the flow passage S, the through hole, the core rod cavity and the inner cavity of the threaded piece are in communication.

5. A joint device according to any one of claims 1-4, characterised in that The male joint further comprises a joint nut and a first elastic piece, the joint nut is fixedly connected with the joint body, the joint nut comprises an abutting part, one end part of the first elastic piece abuts against the abutting part, the other end part abuts against the core body, the inner cavity of the joint nut, the inner space of the first elastic piece, the flow passage S, the through hole and the core rod cavity are in communication.

6. The joint device according to claim 5, the male joint further comprises a gasket, the core body comprises a supporting leg which can be in sliding cooperation with the inner wall of the joint body, one side part of the gasket abuts against the supporting leg, the other side part abuts against the first elastic piece, the end part of the first elastic piece which is away from the gasket directly abuts against the abutting part, a sub-flow passage is formed between two adjacent supporting legs, the inner cavity of the joint nut, the inner space of the first elastic piece, the sub-flow passage, the flow passage S, the through hole and the core rod cavity are in communication.

7. A joint device according to any one of claims 1-4, characterised in that The joint body comprises a base and an extension part which protrudes from the end face part, the joint body is provided with a slope part, the male joint comprises a sealing piece, the joint body or the core body head is provided with a mounting groove, the sealing piece is at least partially limited in the mounting groove, the core body head is provided with a first sealing cooperation part, the sealing piece abuts between the first sealing cooperation part and the joint body, in the separated state, the core body abuts against the slope part.

8. A joint device according to any one of claims 1-4, characterised in that The female joint comprises a sleeve, a bushing, a second elastic member and a connecting nut, the sleeve is fixedly connected with the connecting portion or is an integral structure, the connecting nut is sleeved on the outer peripheral portion of the sleeve, the joint body is provided with an outer threaded portion, the connecting nut is provided with an inner threaded portion which is threadedly matched with the outer threaded portion, part of the bushing is located between the sleeve and the core rod, the bushing comprises a bushing step portion, the core rod comprises a core rod step portion, the second elastic member is sleeved on the outer peripheral portion of the core rod, one end portion of the second elastic member abuts against the core rod step portion, and the other end portion abuts against the bushing step portion.

9. The joint device according to claim 8, characterized in that The sleeve comprises a first abutting portion, a second abutting portion and a third abutting portion, the connecting nut is provided with a nut abutting portion, the bushing comprises a bushing abutting portion and a bushing abutting portion, the inner peripheral wall of the bushing or the outer peripheral wall of the core rod is provided with a first installation groove and a second installation groove, the female joint comprises a first sealing member which is at least partially limited in the first installation groove, and a second sealing member which is at least partially limited in the second installation groove, the outer peripheral wall of the bushing or the inner peripheral wall of the joint body is provided with a third installation groove, and the female joint comprises a third sealing member which is at least partially limited in the third installation groove.

10. The joint device according to claim 9, characterized in that The core rod comprises a second sealing cooperation portion and a third sealing cooperation portion, the second sealing cooperation portion and the third sealing cooperation portion are located on different sides of the through hole, in the separated state of the joint device, the first sealing member abuts between the first sealing cooperation portion and the bushing, the second sealing member abuts between the second sealing cooperation portion and the bushing, the nut abutting portion abuts against the first abutting portion, and the bushing abutting portion abuts against the second abutting portion.

11. The joint device of claim 9, wherein The core body head comprises a first abutting portion, the core rod head comprises a second abutting portion, the joint body comprises an extension portion end face, in the connected state of the joint device, the connecting nut is threadedly connected with the joint body, the first abutting portion abuts against the second abutting portion, the end face portion of the joint body abuts against the bushing abutting portion, the extension portion end face is hard sealingly matched with the third abutting portion, the first sealing member abuts between the bushing and the third sealing cooperation portion, the second sealing member abuts between the bushing and the third sealing cooperation portion, and the third sealing member abuts between the bushing and the joint body.

12. A joint device according to any one of claims 1-4, characterised in that The joint nut is provided with a first clamping portion, the connecting nut is provided with a second clamping portion, and the first clamping portion and the second clamping portion are used for cooperating with an external wrench for operation.

13. A joint device, characterized by The female joint comprises a core rod, a sleeve, a bushing, a second elastic member and a connecting nut, the core rod comprises a connecting part, the connecting part is fixedly connected with the sleeve or is an integral structure, the bushing is sleeved on the outer circumferential part of the core rod, the bushing is sealingly matched with the core rod and can axially displace relative to the core rod, part of the bushing is located between the sleeve and the core rod, the second elastic member is sleeved on the outer circumferential part of the core rod and directly or indirectly abuts between the bushing and the connecting part, the connecting nut is sleeved on the outer circumferential part of the sleeve, the core rod is provided with a through hole penetrating through the inner and outer surfaces of the core rod, and the through hole is communicated with the core rod cavity.

14. The joint device of claim 13, wherein One side of the connecting part is fixedly connected with the sleeve or is an integral structure, the other side of the connecting part is directly connected with an external connecting piece, and the external connecting piece comprises a pipe or a threaded piece.

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