A pipe fitting connection apparatus and method of use thereof

Abstract

The pipe connecting device is optimized, and the clamping piece is arranged. When the pipe connecting device is in the connecting state, the first joint body is in clearance fit with the second bushing, part of the clamping portion is located in the groove portion, and the clamping portion abuts against the groove portion. When the pipe connecting device is in the dismounting state, the first joint body is displaced relative to the second joint body, the clamping piece is separated from the groove portion, the pressing ring is displaced relative to the second joint body, the pressing ring abuts against the clamping portion, the clamping portion is deformed towards the first bushing, and the first joint part is separated from the second joint part. Therefore, the installation or dismounting of the first joint part and the second joint part is more convenient.

Description

[Technical Field]

[0001] This application relates to the field of refrigeration control technology, and in particular to a pipe fitting connection device and its usage method. [Background Technology]

[0002] Quick couplings are widely used in pipeline connections, including male and female couplings. The male coupling is inserted into the female coupling, and the two are connected by a steel ball for limiting. The female coupling has a connecting sleeve on the outside. The movement of the connecting sleeve controls the movement of the steel ball. When the connecting sleeve is pushed to a certain position to the right, the steel ball slides into the groove at the front end of the connecting sleeve, and the steel ball and the male coupling body separate, thus separating the male and female couplings. [Summary of the Invention]

[0003] The purpose of this invention is to provide a new type of pipe fitting connection device and its usage method, which has a relatively simple overall structure.

[0004] To achieve the above objectives, the present invention provides a pipe fitting connection device, including a first connector component and a second connector component, wherein the first connector component and the second connector component are detachably connected, the first connector component includes a first connector body, and the outer periphery of the first connector body is provided with a groove, and the second connector component includes a second connector body, a first bushing, a second bushing, a pressure ring component, and a snap-fit ​​component.

[0005] The first bushing is connected to the second connector body or is an integral structure. The second bushing is connected to the second connector body. The snap-fit ​​member includes a base and a snap-fit ​​part. The base is limited or fixed between the first bushing and the second bushing. The snap-fit ​​part protrudes from the base in a direction away from the second bushing. A portion of the pressure ring member is limited inside the second bushing. A portion of the first connector body is located inside the first bushing. Yet another portion of the first connector body is located inside the pressure ring member.

[0006] The engaging portion deforms and abuts against the bottom wall of the groove, with a portion of the engaging portion located within the groove.

[0007] This application also provides a method for connecting and using a pipeline fitting connection device, which includes at least the following steps: pushing the first connector component along the axial direction of the second connector component, so that the first connector component slides into the pressure ring component and is inserted into the first receiving cavity of the second connector component;

[0008] The engaging portion of the latching member deforms and abuts against the bottom wall of the groove, with a portion of the engaging portion located within the groove.

[0009] This application also provides a method for disassembling and using a pipe fitting connection device, which includes at least the following steps:

[0010] Along the axial direction of the pipe fitting connection device, the first connector body is displaced relative to the second connector body, and the engaging portion disengages from the groove portion;

[0011] The pressure ring is displaced relative to the second bushing, causing the pressure ring to abut against the engaging portion, and the engaging portion deforms toward the first bushing;

[0012] This causes the first connector component to detach from the second connector component.

[0013] This invention provides a novel pipe fitting connection device and its usage method. Through optimized design of the pipe fitting connection device, a snap-fit ​​component is provided. The snap-fit ​​component includes a base and an engaging portion. The base is limited or fixed between the first bushing and the second bushing. Part of the pressure ring component is located within the second bushing. Part of the first connector body is located within the first bushing, and another part of the first connector body is located within the pressure ring component. The engaging portion deforms and abuts against the bottom wall of the groove portion. Part of the engaging portion is located within the groove portion. The overall structure of the pipe fitting connection device is relatively simple. [Attached Image Description]

[0014] Figure 1 A three-dimensional structural diagram of the pipe fitting connection device provided in this application after it has been detached;

[0015] Figure 2 A cross-sectional schematic diagram of the first connector component after the pipe fitting connection device provided in this application has been disengaged;

[0016] Figure 3 A cross-sectional schematic diagram of the second connector component after the pipe fitting connection device provided in this application has been disengaged;

[0017] Figure 4 for Figure 3 A magnified schematic diagram of the mating structure between the pressure ring and the second connector component;

[0018] Figure 5 A cross-sectional view of the pipe fitting connection device provided in this application after connection;

Detailed Implementation Methods

[0019] To enable those skilled in the art to better understand the technical solutions provided in this application, the technical solutions of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] First Implementation Method

[0021] Reference Figure 1-3As shown, this application provides a pipe fitting connection device structure, including a first connector component 10 and a second connector component 20. The first connector component 10 and the second connector component 20 are detachably connected. The first connector component 10 includes a first connector body 11, which has a groove portion 111a. The second connector component 20 includes a second connector body 21, a first bushing 27, a second bushing 28, a pressure ring 29, and a snap-fit ​​component 30. The first bushing 27 is fixedly connected to the second connector body 21 or is an integral structure. The second bushing 28 is fixedly connected to the second connector body 21. The snap-fit ​​component 30 includes a base portion 31 and a snap-fit ​​portion 32. The base portion 31 is limited or fixed between the first bushing 27 and the second bushing 28. The snap-fit ​​portion 32 protrudes from the base portion 31 in a direction away from the second bushing 28. Part of the pressure ring 29 is located inside the second bushing 28, and the pressure ring 29 is limitedly connected to the second bushing 28.

[0022] When the pipe fitting connection device is in the connected state, part of the first connector body 11 is located inside the first bushing 27 and is in clearance fit with the first bushing 27, and another part of the first connector body 11 is located inside the pressure ring 29 and is in clearance fit with the pressure ring 29. Part of the locking part 32 is located inside the groove 111a, and the locking part 32 directly or indirectly abuts against the bottom wall of the groove 111a. When in the disassembled state, along the radial direction of the pipe fitting connection device, the first connector body 11 is displaced relative to the second connector body 21, causing the locking part 30 to disengage from the groove 111a. The pressure ring 29 is displaced relative to the second connector body 21, causing the pressure ring 29 to abut against the locking part 32 of the locking part 30. The locking part 32 deforms towards the first bushing 27, and the first connector component 10 disengages from the second connector component 20.

[0023] This application provides a novel pipe fitting connection device structure. By adding a snap-fit ​​component, when the first connector component 10 needs to be connected to the second connector component 20, the snap-fit ​​component can achieve a snap-fit ​​and limiting connection with the groove through the deformation of the snap-fit ​​part. When it is necessary to disassemble the two, it is only necessary to operate the first connector body 11 to make the snap-fit ​​component disengage from the groove. Then, press the pressure ring component to make the pressure ring component abut against the snap-fit ​​part to deform the snap-fit ​​part, thereby disengaging the first connector component from the second connector component. Compared with the traditional connection method of setting steel balls and elastic elements between male and female connectors, the overall structure of the pipe fitting connection device provided in this application is relatively simpler, requires fewer components, and is relatively convenient to install or disassemble.

[0024] The pipe fitting connection device structure provided in this application includes a first connector component 10, which includes a first connector body 11, a first connecting portion 12, a first limiting component, and a first valve core assembly 15. The first connector body 11 and the first connecting portion 12 are fixedly connected. A sealing element 200 is provided in the first connecting portion 12 to provide a sealed connection when connected to an external pipe. The first limiting component is fixed or limited between the first connector body 11 and the first connecting portion 12. The first limiting component includes a first limiting portion 13 and a first abutting portion 14. The first valve core assembly 15 is located inside the first connector component 10. The first valve core assembly 15 includes a first valve core 151, a first elastic element 152, and a first valve core seal 153. 3. A first elastic element 152 is disposed on the outer periphery of the first valve core 151, and directly or indirectly abuts against the first limiting member and the first valve core 151. The first valve core 151 includes a first top end portion 1511. The first connector body 11 includes a large-diameter portion 111 and a small-diameter portion 112. The outer diameter of the small-diameter portion 112 is smaller than the outer diameter of the large-diameter portion 111. The large-diameter portion 111 is provided with a groove portion 111a, which is recessed inward from the outer periphery of the large-diameter portion 111. The groove portion 111a includes a first side portion 1111, a second side portion 1112, and a bottom wall portion 1113. The bottom wall portion 1113 is located between the first side portion 1111 and the second side portion 1112. The small-diameter portion 112 is provided with a first valve port portion 113. The first valve core 151 can approach... The first valve core seal 153 can abut against the first valve port 113, or be located away from the first valve port 113. The second connector component 20 includes a second connector body 21, a second connecting part 22, a second limiting component, and a second valve core assembly 25. The second connector component 20 is provided with a first receiving cavity 212 and a second receiving cavity 214. The second connector body 21 is fixedly connected to the second connecting part 22. The second connecting part 22 can be connected and communicated with the external pipe 100. The second connector body 21 is provided with a second valve port 213. The first receiving cavity 212 and the second receiving cavity 214 are located on different sides of the second valve port 213. The second receiving cavity 214 is closer to the second connecting part 22 than the first receiving cavity 212. The second limiting component limits or fixes the second connector body. Between the second connector 21 and the second connecting portion 22, the second limiting component includes a second limiting portion 23 and a second abutting portion 24. At least a portion of the second valve core assembly 25 is located in the second receiving cavity 214. The second valve core assembly 25 includes a second valve core 251, a second elastic member 252, and a second valve core seal 253. The second valve core seal 253 is located on the outer periphery of the second valve core 251. The second elastic member 252 directly or indirectly abuts against the second valve core 251 and the second limiting component. The second valve core 251 can approach or move away from the second valve port 213, and the second valve core seal 253 can abut against the second valve port 213. The second connector component 20 also includes a seal 26, a first bushing 27, a second bushing 28, a pressure ring 29, and a snap-fit ​​member 30.The first bushing 27 and the second bushing 28 are located in the first receiving cavity 212. The second connector body 21 has a stepped portion 21a and a deformable portion 211. The first bushing 27 can be connected to the second connector body 21, or the two can be an integral structure. For example, the first bushing 27 and the second connector body 21 can be press-fitted, clearance-fitted, or threaded-fitted. The first bushing 27 includes a first bushing body 271 and a shaft seat 272. The first bushing body 271 extends axially along the second connector body 21, and the shaft seat 272 protrudes radially from the first bushing body 271. The second bushing 28 is generally a hollow sleeve structure. The second bushing 28 has a first protrusion 281. Part of the seal 26 is located in the receiving groove formed by the shaft seat 272 and the second connector body 21. The seal 26 abuts against the outer periphery of the first connector body 11 to achieve a sealed connection and prevent refrigerant leakage. The seal 26 can use a double sealing ring structure. In the case where the first bushing 27 and the second connector body are an integral structure, a single sealing ring structure can also be used to embed into the receiving groove to achieve a sealed connection with the first connector body. In this embodiment, the snap-fit ​​30 can be a snap-fit ​​structure. The snap-fit ​​30 is generally a hollow, thin-walled metal structure, including a base 31 and a snap-fit ​​part 32. The base 31 is generally annular, and the snap-fit ​​part is generally a plurality of internal teeth protruding circumferentially along the base. The snap-fit ​​part 32 protrudes from the base 31 in a direction away from the second bushing 28. The snap-fit ​​part 32 is generally conical, and the snap-fit ​​part 32 includes a first part 321 and a second part 322. The first part 321 is farther from the base 31 than the second part 322. Along the radial direction of the pipe fitting connection device, the longitudinal cross-sectional area of ​​the second part 322 is larger than that of the first part 321. Through the riveting deformation applied to the deformable part 211 of the second connector body 21, the base 31 is confined between the first bushing and the second bushing. The bearing seat 271 abuts against the step part 21a, and the deformable part 211 abuts against the second bushing 28. Alternatively, the base 31 of the snap-fit ​​member 30 can be welded and fixed to one of the first bushing 27 or the second bushing 28 first, and then fixed between the first bushing and the second bushing through the riveting deformation of the deformable part 211. For example, the base 31 can be welded to the first bushing body 271 of the first bushing 27 first. The first bushing 27 and the snap-fit ​​component are integrally inserted into the first receiving cavity of the second connector body 21. The first bushing 27 is clearance-fitted or press-fitted with the first connector body 21. A riveting deformation action is applied to the deformable part 211 to fix the snap-fit ​​component 30 between the first bushing and the second bushing. The pressure ring 29 is generally a hollow cylindrical structure with a flange. Part of the pressure ring 29 is located inside the second bushing 28. The pressure ring 29 includes a crimping part 291 and a body part 292. The crimping part 291 is flanged radially outward from the body part 292. When the first connector component 10 is inserted into the second connector component 20, the body part 292 can slide with the large-diameter part 111. The body part 292 includes a thin-walled part and a thick-walled part. The thin-walled part is closer to the snap-fit ​​component 30 than the thick-walled part.The main body 292 also includes an abutment portion 2922 and a second protrusion portion 2921. The abutment portion 2922 is closer to the latching member 30 than the second protrusion portion 2921. The abutment portion 2922 can abut against the engaging portion 32. The first protrusion portion 281 protrudes towards the main body 292, and the second protrusion portion 2921 protrudes from the thin-walled portion towards the second bushing 28. The thin-walled portion can deform to engage the first protrusion portion 281 and the second protrusion portion 2921 to limit the connection between the pressure ring member 29 and the second bushing 28. Alternatively, the first protrusion portion and the second protrusion portion can be replaced by an internal and external thread engagement, with a threaded mechanism of several turns to limit the connection between the pressure ring member and the second bushing. It should be noted that when the pressure ring and the second bushing are connected by threads, only a portion of the pressure ring needs to be confined within the second bushing 28 through the threaded engagement. Specifically, the inner edge of the second bushing 28, relatively close to the snap-fit ​​member 30, has an internal thread, and the outer edge of the body 292, relatively close to the snap-fit ​​member 30, has an external thread. The portion of the second bushing 28 relatively far from the internal thread and the portion of the body 292 relatively far from the external thread are clearance-fitted to prevent the pressure ring from locking into the second bushing and preventing axial displacement. When it is necessary to operate the pressure ring to abut against the snap-fit ​​member, the pressure ring only needs to be axially displaced to the right relative to the second bushing through the threaded engagement of both.

[0025] The following is a brief description of the installation and disassembly processes of the first and second connector components. When the first connector component 10 and the second connector component 20 are in a separated state, the first valve core seal 153 abuts against the first valve port 113, and the second valve core seal 253 abuts against the second valve port 213. The first connector component 10, i.e., the male connector assembly, is installed into the second connector component 20, i.e., the female connector assembly. The large diameter portion slides into the inner wall of the pressure ring 29. Through the deformation of the engaging portion 32 of the snap-fit ​​component 30, it snaps into the groove 111a. Part of the engaging portion 32 is located in the groove 111a. The engaging portion 32 engages and abuts against the bottom wall portion 1113 of the groove 111a. The first side portion 1111 is opposite to the second... The side portion 1112 is closer to the pressure ring 29. The shape of the first side portion 1111 is adapted to the shape of the engaging portion 32. The first side portion 1111 is generally conical. The seal 26 abuts against the small diameter portion 112. Part of the large diameter portion 111 is located inside the pressure ring 29. A gap is formed between the front end of the large diameter portion 111 and the shaft seat 272. The small diameter portion 112 is located in the first receiving cavity 212. The first top end portion 1511 of the first valve core 151 and the second top end portion 2511 of the second valve core 251 push against each other, so that the first valve core sealing component 153 is away from the first valve port portion 113 and the second valve core sealing component 253 is away from the second valve port portion 213, so that the first valve port portion 113 and the second valve port portion 213 are in communication with each other.

[0026] When it is necessary to disassemble the first connector component and the second connector component, a force is applied to the first connector body 11 along the axial direction of the pipe fitting connection device, causing the first connector body 11 to shift to the right relative to the second connector body 21, so that the gap formed between the front end of the large diameter portion 111 and the shaft seat 272 disappears, the large diameter portion 111 abuts against the shaft seat 272, and the first side portion 1111 of the groove portion 111a is adapted to the shape of the engaging portion 32 of the snap-fit ​​member 30, and the engaging portion 32 moves out of the groove portion 111a. 1a slides out to disengage from the groove, and then a force is applied to the pressing part 291 of the pressure ring 29, causing the pressure ring 29 to also shift to the right relative to the second connector body 21. At this time, the second protrusion 2921 moves away from the first protrusion 281, causing the abutting part 2922 to abut against the engaging part 32 of the snap-fit ​​member. The engaging part 32 expands under the force and deforms in the direction of the first bushing 27, thereby causing the first connector component 10 to disengage entirely from the second connector component 20.

[0027] To further ensure the connection reliability of the first connector component and the second connector component, in the initial state, i.e., when the two are disengaged, the minimum inner diameter of the first part, i.e., the engagement portion 32 of the snap-fit ​​component 30, is set to be smaller than the outer diameter of the bottom wall portion 1113 of the groove portion 111a. With the above-mentioned setting, after the first connector component and the second structural component are connected, the snap-fit ​​component 30 can be deformed and clamp the groove portion 111a, preventing the snap-fit ​​component 30 from coming out of the groove portion 111a, thus enhancing the connection reliability. The thickness of the engagement portion 32 is set to be smaller than the width of the groove portion 111a. The width of the groove portion 111a is the distance between the first side portion 1111 and the second side portion 1112, and the thickness of the engagement portion 32 is smaller than the depth of the groove portion 111a. When the snap-fit ​​component engages with the groove portion, the engagement portion can be reliably engaged in the groove portion. At the same time, in the event of misoperation, pressing the pressure ring component 29 directly will not easily cause the engagement portion to come out of the groove portion, which can effectively prevent misoperation.

[0028] Traditional male and female connectors often use a ball-bearing retaining structure. This structure has many components, complex manufacturing processes, and cumbersome assembly. Furthermore, it poses a safety hazard due to misoperation, potentially causing the connector to loosen. This application provides a novel pipe fitting connection device structure. By adding a snap-fit ​​structure and improving the structure of the first and second connector components, when the pipe fitting device is in the connected state, the first connector body and the second bushing have a clearance fit, with part of the snap-fit ​​portion located within the groove, abutting against the groove. When in the disassembled state, the first connector body is positioned relative to the second connector body. When displacement occurs, the snap-fit ​​part disengages from the groove, the pressure ring part displaces relative to the second connector body, the pressure ring part abuts against the engaging part, the engaging part deforms toward the first bushing, and the first connector component disengages from the second connector component. This makes the installation or disassembly of the first connector component and the second connector component more convenient. After the first connector component and the second connector component are connected, due to the spring force of the snap-fit ​​part engaging and limiting the snap-fit ​​part with the groove, as well as the pressure inside the pipeline, if the pressure ring part 29 is pressed directly by mistake, the snap-fit ​​part cannot be disengaged from the groove. This can play a role in preventing opening, thereby solving the safety hazard of connector disengagement caused by mistaken operation.

[0029] Second Implementation Method

[0030] The difference from the first embodiment lies in the way the second bushing 28 and the second connector body 21 are fitted together. The second bushing 28 is provided with an external thread, and the side of the second connector body 21 that is relatively far away from the first bushing 27 is provided with an internal thread. The external thread of the second bushing 28 and the internal thread of the second connector body 21 are connected by a thread to limit or fix the base 31 of the snap-fit ​​member 30 between the first bushing and the second bushing, which can also achieve the technical effect of this application.

[0031] Third Implementation Method

[0032] The difference from the first embodiment lies in the way the second bushing 28 and the second connector body 21 are connected by welding, so that the base 31 of the snap-fit ​​30 is limited or fixed between the first bushing and the second bushing, which can also achieve the technical effect of this application.

[0033] This application provides a pipe fitting connection device structure, including a first connector component and a second connector component. The first connector component and the second connector component are detachably connected. The first connector component includes a first connector body, and the outer periphery of the first connector body is provided with a groove. The second connector component includes a second connector body, a first bushing, a second bushing, a pressure ring, and a snap-fit ​​component.

[0034] The first bushing is connected to the second connector body or is an integral structure. The second bushing is connected to the second connector body. The snap-fit ​​part includes a base and a snap-fit ​​part. The base is limited or fixed between the first bushing and the second bushing. The snap-fit ​​part protrudes from the base in a direction away from the second bushing. Part of the pressure ring is located inside the second bushing. Part of the first connector body is located inside the first bushing. Yet another part of the first connector body is located inside the pressure ring.

[0035] The engaging part deforms and abuts against the bottom wall of the groove, with part of the engaging part located inside the groove.

[0036] This application provides a novel pipe fitting connection device structure. By adding a snap-fit ​​component, when the first connector component 10 needs to be connected to the second connector component 20, the snap-fit ​​component can achieve a snap-fit ​​and limiting connection with the groove through the deformation of the snap-fit ​​part. When it is necessary to disassemble the two, it is only necessary to operate the first connector body 11 to make the snap-fit ​​component disengage from the groove. Then, press the pressure ring component to make the pressure ring component abut against the snap-fit ​​part to deform the snap-fit ​​part, thereby disengaging the first connector component from the second connector component. Compared with the traditional connection method of setting steel balls and elastic elements between male and female connectors, the overall structure of the pipe fitting connection device provided in this application is relatively simpler, requires fewer components, and is relatively convenient to install or disassemble.

[0037] It should be noted that the directional terms such as "up" and "down" or ordinal numbers such as "first" and "second" mentioned in this document are introduced for ease of description based on the accompanying drawings; they do not imply any limitation on the order of the components. Furthermore, the term "mutual abutment" mentioned in this invention includes both direct and indirect abutment between two components. For example, the engaging portion of a snap-fit ​​component can achieve indirect abutment with the bottom wall portion by using a gasket fitted onto the outer periphery of the bottom wall portion of the groove portion. Since some parts of the components provided in the above embodiments have the same function, this specification uses a unified naming convention for these parts. The above provides a detailed description of the pipe fitting connection device provided by the relevant technical solutions. Specific embodiments have been used in this document for illustration. The description of the above embodiments is only for helping to understand the method and core idea of ​​the present invention and is not intended to limit the present invention in any way.

Claims

1. A pipe fitting connection device, characterized in that, It includes a first connector component and a second connector component, the first connector component and the second connector component are detachably connected, the first connector component includes a first connector body, the outer periphery of the first connector body is provided with a groove, and the second connector component includes a second connector body, a first bushing, a second bushing, a pressure ring and a snap-fit ​​component. The first bushing is connected to the second connector body or is an integral structure. The second bushing is connected to the second connector body. The snap-fit ​​member includes a base and a snap-fit ​​part. The base is limited or fixed between the first bushing and the second bushing. The snap-fit ​​part protrudes from the base in a direction away from the second bushing. A portion of the pressure ring member is limited inside the second bushing. A portion of the first connector body is located inside the first bushing. Yet another portion of the first connector body is located inside the pressure ring member. The engaging portion deforms and abuts against the bottom wall of the groove portion, with a portion of the engaging portion located within the groove portion; The second connector body includes a stepped portion, and the first bushing includes a first bushing body and a bearing seat, the bearing seat extending radially from the first bushing body and abutting against the stepped portion; The first connector component includes a first connecting portion, and the first connector body is fixedly connected to the first connecting portion. The first connector body includes a large-diameter portion and a small-diameter portion. The large-diameter portion is provided with a groove portion, which is recessed inward from the outer edge of the large-diameter portion. The large-diameter portion can slide with the pressure ring component. When the first connector and the second connector are in the connected state, a gap is formed between the front end of the large-diameter portion and the shaft seat. The groove portion includes a first side portion, a second side portion, and a bottom wall portion. The bottom wall portion is located between the first side portion and the second side portion. The engaging portion can engage and limit the bottom wall portion through deformation. The first side portion is generally conical in shape, and the second side portion is straight in shape.

2. The pipe fitting connection device according to claim 1, characterized in that, The second connector body includes a deformable part, which clamps the base between the first bushing and the second bushing through the riveting deformation of the deformable part. The first bushing abuts against the stepped part, and the second bushing abuts against the deformable part.

3. A pipe fitting connection device according to claim 1, characterized in that, The first bushing is clearance-fitted or press-fitted with the second connector body. The first bushing abuts against the stepped portion of the second connector body. The second bushing is provided with an external thread portion, and the second connector body is provided with an internal thread portion. The base is clamped between the first bushing and the second bushing through the threaded engagement of the external thread portion and the internal thread portion.

4. A pipe fitting connection device according to claim 1, characterized in that, The first bushing is clearance-fitted or press-fitted with the second connector body, the first bushing abuts against the stepped portion of the second connector body, and the second bushing is welded to the second connector body for fixation.

5. A pipe fitting connection device according to any one of claims 2-4, characterized in that, The pipeline connection device also includes a seal, part of which is located in the receiving groove formed by the shaft seat and the second connector body, and the seal abuts against the first connector body.

6. A pipe fitting connection device according to any one of claims 1-4, characterized in that, The second bushing is provided with a first rib, and the pressure ring includes a pressing part and a body part. The pressing part is radially outward from the body part, and the body part is provided with a second rib. The first rib protrudes toward the body part, and the second rib protrudes toward the second bushing. The first rib and the second rib abut against each other.

7. A pipe fitting connection device according to claim 1, characterized in that, The second connector body is provided with a first receiving cavity, and the small diameter portion is located in the first receiving cavity.

8. A pipe fitting connection device according to claim 7, characterized in that, It also includes a first valve core assembly and a first limiting component. The first valve core assembly includes a first valve core and a first elastic element. The first limiting component limits or fixes between the first connecting portion and the first joint component. The first elastic element abuts against the first limiting component and the first valve core. The small-diameter portion is provided with a first valve port. The first valve core can approach or move away from the first valve port.

9. A pipe fitting connection device according to claim 1, characterized in that, The second connector component is provided with a second receiving cavity, including a second connecting portion. The second connector body is fixedly connected to the second connecting portion. The pipeline connection device also includes a second valve core assembly and a second limiting component. At least a portion of the second valve core assembly is located in the second receiving cavity. The second valve core assembly includes a second valve core and a second elastic element. The second limiting component limits or fixes itself between the second connector body and the second connecting portion. The second elastic element abuts against the second limiting component and the second valve core. The second connector body is provided with a second valve port. The second valve core can approach or move away from the second valve port.

10. A pipe fitting connection device according to any one of claims 1-4 or 7-9, characterized in that, The first side portion is closer to the pressure ring than the second side portion. The shape of the first side portion is adapted to the shape of the engaging portion. The engaging portion is generally conical in shape and includes a first part and a second part. The first part is farther from the base than the second part. Along the radial direction of the pipe fitting connection device, the longitudinal cross-sectional area of ​​the second part is larger than that of the first part.

11. A pipe fitting connection device according to any one of claims 1-4 or 7-9, characterized in that, The minimum inner diameter of the engaging portion is smaller than the outer diameter of the bottom wall of the groove portion, the thickness of the engaging portion is smaller than the width of the groove portion, and the thickness of the engaging portion is smaller than the depth of the groove portion.

12. The connection and usage method of the pipe fitting connection device as described in claim 1, characterized in that, At least the following operational steps are included: Push the first connector component along the axial direction of the second connector component to make the first connector component slide into the pressure ring component and be inserted into the first receiving cavity of the second connector component; The engaging portion of the snap-fit ​​component deforms and abuts against the bottom wall of the groove, with a portion of the engaging portion located within the groove.

13. The method for disassembling and using a pipe fitting connection device as described in claim 1, characterized in that, At least the following operational steps are included: Along the axial direction of the pipe fitting connection device, the first connector body is displaced relative to the second connector body, and the engaging portion disengages from the groove portion; The pressure ring is displaced relative to the second bushing, causing the pressure ring to abut against the engaging portion, and the engaging portion deforms toward the first bushing; This causes the first connector component to detach from the second connector component.

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