Pipe fitting connecting structure

Abstract

The utility model belongs to the technical field of connecting structures, and discloses a pipe fitting connecting structure which comprises a first pipe fitting, a second pipe fitting, a first connecting piece and a second connecting piece, the second pipe fitting is connected with the first pipe fitting in a sleeved mode, and the first connecting piece is provided with a first locking part and an unlocking part; an elastic second locking part is arranged on the second connecting piece; during locking, the second connecting piece is inserted into the first connecting piece, and the second locking part enters the first locking part and locks the first connecting piece and the second connecting piece; during unlocking, the second connecting piece is rotated to drive the second locking part to enter the unlocking part from the first locking part, and the first connecting piece and the second connecting piece are unlocked. According to the utility model, the unlocking efficiency of the first pipe fitting and the second pipe fitting is high, and the reliability is high.

Description

Technical Field

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

[0002] Pipe-to-pipe connections are typically achieved by using connectors between the two pipes. For telescopic pipes, in addition to locking and securing the outer and inner pipes, easy unlocking is also required. Existing telescopic pipes generally use a snap-fit ​​locking mechanism between the outer and inner pipes; one pipe has a slot, and the other has a latch, which engage to lock the pipes. Unlocking requires manually pressing the latch and coordinating with the relative movement of the outer and inner pipes, which is relatively laborious. Utility Model Content

[0003] The purpose of this utility model is to provide a pipe connection structure to solve the problem of laborious unlocking operation between the outer pipe and the inner pipe.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A pipe fitting connection structure, comprising:

[0006] First pipe fitting;

[0007] The second pipe fitting is sleeved with the first pipe fitting;

[0008] A first connector is connected to the first pipe fitting, and the first connector is provided with a first locking part and an unlocking part;

[0009] The second connector is connected to the second pipe fitting, and the second connector is provided with a second locking part that has elasticity.

[0010] When locked, the second connector is inserted into the first connector, and the second locking part enters the first locking part and locks the first connector and the second connector.

[0011] When unlocking, the second connector is rotated to move the second locking part from the first locking part into the unlocking part, thereby unlocking the first connector and the second connector.

[0012] In some embodiments, the first pipe is an outer pipe and the second pipe is an inner pipe; the first locking part includes a locking groove and the unlocking part includes an unlocking groove, the locking groove and the unlocking groove are disposed on the inner wall of the first connector and communicate with each other along the circumferential direction of the first connector; the second locking part protrudes from the outer wall of the second connector.

[0013] In some embodiments, the depth of the locking groove is greater than the depth of the unlocking groove, the unlocking groove includes a first unlocking groove and a second unlocking groove arranged radially, the connection between the first unlocking groove and the locking groove is smoothly arranged, the second unlocking groove is smoothly arranged with the first unlocking groove, and one end of the second unlocking groove away from the first unlocking groove is smoothly arranged with the inner wall of the first connector.

[0014] In some embodiments, the first connector is provided with a guide channel, and the second locking part can slide along the guide channel to enter the locking groove.

[0015] In some embodiments, the sidewall of the guide channel is a smooth surface, and the width of the guide channel gradually decreases along the insertion direction of the second connector, and the minimum width of the guide channel is not less than the width of the locking groove;

[0016] And / or, along the circumferential direction, the width L1 of the unlocking groove is greater than the width L2 of the second locking part.

[0017] In some embodiments, a first guide slope is provided between the guide channel and the locking groove. The first guide slope has a first distance between one end near the guide channel and the axis of the first connector, and a second distance between the one end near the locking groove and the axis of the first connector. The first distance is greater than the second distance.

[0018] And / or,

[0019] The second locking part has a second guide slope at one end near the first connector. The second guide slope has a third distance between the end near the first connector and the axis of the second connector, and a fourth distance between the end away from the first connector and the axis of the second connector. The third distance is smaller than the fourth distance.

[0020] In some embodiments, the second connector is provided with a first spring piece, and the second locking part is disposed at the free end of the first spring piece, wherein the width of the free end of the first spring piece is smaller than the width of its fixed end.

[0021] In some embodiments, the side wall of the second pipe is provided with an opening to avoid the second locking part. When the second connector is fixed inside the second pipe, the second locking part passes through the opening and protrudes from the outer wall of the second pipe.

[0022] In some embodiments, one of the first connector and the first pipe is provided with a first elastic buckle and the other is provided with a first positioning hole, wherein the first elastic buckle engages with the first positioning hole.

[0023] In the second connector and the second pipe fitting, one is provided with a second elastic buckle and the other is provided with a second positioning hole, and the second elastic buckle engages with the second positioning hole.

[0024] In some embodiments, the first elastic buckle is provided with a third guide slope, which is configured to guide the first connector into the first pipe fitting; the second elastic buckle is provided with a fourth guide slope, which is configured to guide the second connector into the second pipe fitting.

[0025] And / or, the first elastic buckle is disposed at one end of the first connector near the second connector, and the other end of the first connector is provided with a first annular protrusion; the second elastic buckle is disposed in the middle of the second connector, and the end of the second connector opposite to the second locking part is provided with a second annular protrusion.

[0026] The beneficial effects of this utility model are:

[0027] The pipe fitting connection structure provided by this utility model includes a first connector connected to a first pipe fitting and a second connector connected to a second pipe fitting. The first connector has a first locking part and an unlocking part, and the second connector has a resilient second locking part. When locking, the second connector is inserted into the first connector, and the second locking part moves directly into the first locking part, locking both the first and second connectors, thereby locking the first and second pipe fittings. Locking is convenient, quick, and efficient. When unlocking, the second connector is rotated to move the second locking part from the first locking part into the unlocking part, unlocking both the first and second connectors, and thus unlocking the first and second pipe fittings. During unlocking, manual pressing is not required; the first and second pipe fittings are held with both hands and rotated relative to each other to achieve unlocking, resulting in high efficiency and reliability in unlocking the first and second pipe fittings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the pipe fitting connection structure provided in this embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the locking state of the pipe fitting connection structure provided in this embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the unlocked state of the pipe fitting connection structure provided in this embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the first connector and the second connector in the pipe connection structure provided in this embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram showing the positional relationship between the locking groove and the unlocking groove in the pipe fitting connection structure provided in this embodiment of the utility model;

[0033] Figure 6 This is a schematic diagram of the pipe fitting connection structure provided in this embodiment of the present invention, showing the first connector and the second connector located in the guide position.

[0034] Figure 7 This is a schematic diagram of the pipe fitting connection structure provided in this embodiment of the present invention, in which the first connector and the second connector are in a locked state;

[0035] Figure 8 This is a schematic diagram of the pipe fitting connection structure provided in this embodiment of the utility model, in which the first connector and the second connector are in the unlocked state;

[0036] Figure 9 This is a cross-sectional view of the first connector in the pipe connection structure provided in this embodiment of the utility model;

[0037] Figure 10 yes Figure 9 Enlarged structural diagram of region A in the middle;

[0038] Figure 11 This is a schematic diagram of the first guide slope in the pipe fitting connection structure provided in this embodiment of the utility model;

[0039] Figure 12 yes Figure 11 A magnified structural diagram of region B in the middle;

[0040] Figure 13 This is a schematic diagram of the structure of the second connector in the pipe connection structure provided in this embodiment of the utility model;

[0041] Figure 14 This is a schematic diagram of the structure of the first connector in the pipe connection structure provided in this embodiment of the utility model;

[0042] Figure 15 This is a partially exploded structural diagram of the pipe fitting connection structure provided in this embodiment of the utility model.

[0043] In the picture:

[0044] 1. First pipe fitting; 11. First positioning hole;

[0045] 2. Second fitting; 21. Opening; 22. Second positioning hole;

[0046] 3. First connector; 31. First locking part; 311. Locking groove; 32. Unlocking part; 321. Unlocking groove; 3211. First unlocking groove; 3212. Second unlocking groove; 322. Limiting step; 33. Guide channel; 34. First guide slope; 35. First elastic buckle; 351. Third guide slope; 36. First annular protrusion;

[0047] 4. Second connector; 41. Second locking part; 411. Second guide slope; 42. First spring; 43. Second elastic buckle; 431. Fourth guide slope; 44. Second spring; 45. Second annular protrusion. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0052] like Figures 1-4 As shown, this utility model embodiment provides a pipe connection structure, including a first pipe 1, a second pipe 2, a first connector 3, and a second connector 4. The second pipe 2 is sleeved with the first pipe 1; the first connector 3 is connected to the first pipe 1, and the first connector 3 is provided with a first locking part 31 and an unlocking part 32; the second connector 4 is connected to the second pipe 2, and the second connector 4 is provided with a resilient second locking part 41. When locked, the second connector 4 is inserted into the first connector 3, and the second locking part 41 enters the first locking part 31 and locks the first connector 3 and the second connector 4. When unlocked, the second connector 4 is rotated to drive the second locking part 41 from the first locking part 31 into the unlocking part 32, thus unlocking the first connector 3 and the second connector 4.

[0053] For ease of explanation, the pipe connection structure provided in this embodiment of the utility model is illustrated using the locking and unlocking of the outer and inner pipes as an example. Figure 1 As shown, the first fitting 1 is the outer pipe, and the second fitting 2 is the inner pipe. The first fitting 1 is sleeved over the second fitting 2. After sleeved, the first connector 3 and the second connector 4 are both located inside the first fitting 1. When locked, as shown... Figure 2 Second pipe fitting 2 along Figure 2 The second connector 4 moves relative to the first connector 3 in the direction indicated by the middle arrow, causing the second locking part 41 to insert into the first connector 3. The second locking part 41 then moves directly into the first locking part 31 and locks the first connector 3 and the second connector 4, thereby quickly locking the first connector 1 and the second connector 2. The first connector 1 and the second connector 2 remain in their extended state, making locking convenient, quick, and efficient. When unlocking, as... Figure 3 The second connector 4 is rotated by the second tube 2, causing the second locking part 41 to move from the first locking part 31 into the unlocking part 32. This unlocks the first connector 3 and the second connector 4, and consequently, the first tube 1 and the second tube 2. During the unlocking process, manual pressing is not required; the first tube 1 and the second tube 2 are held by both hands and rotated relative to each other to achieve unlocking. This results in high unlocking efficiency and reliability for both the first tube 1 and the second tube 2. After unlocking, the second tube 2 can retract into the first tube 1. It can be understood that both the movement during locking and the rotational movement during unlocking between the first connector 3 and the second connector 4 are relative movements.

[0054] In some embodiments, the first pipe 1 is an outer pipe and the second pipe 2 is an inner pipe; the first locking part 31 includes a locking groove 311 and the unlocking part 32 includes an unlocking groove 321. The locking groove 311 and the unlocking groove 321 are disposed on the inner wall of the first connector 3 and are connected along the circumferential direction of the first connector 3; the second locking part 41 protrudes from the outer wall of the second connector 4.

[0055] like Figure 4 As shown, the second locking part 41 is a protrusion provided on the outer wall of the second connector 4. Multiple protrusions can be provided; in this embodiment, two protrusions are used as an example. The two protrusions are evenly spaced along the circumferential direction of the outer wall of the second connector 4 to provide uniform force during locking. Figure 5 Multiple sets of locking grooves 311 and unlocking grooves 321 are spaced apart along the circumferential direction of the inner wall of the first connecting member 3. The locking grooves 311 and unlocking grooves 321 are connected, allowing the second connecting member 4 to rotate and unlock the second locking part 41 from the locking groove 311 to the unlocking groove 321. It can be understood that in this embodiment, the second locking part 41 is elastic. Therefore, by utilizing the difference in elastic deformation between the second locking part 41 in the locking groove 311 and the unlocking groove 321, the second locking part 41 is gradually compressed and deformed during the rotation from the locking groove 311 to the unlocking groove 321, thus achieving unlocking. It should be noted that the locking grooves 311 and unlocking grooves 321 are at least partially connected along the circumferential direction of the inner wall of the first connecting member 3, allowing the second locking part 41 to rotate from the locking groove 311 to the unlocking groove 321 by a certain angle. Further, along the axial direction of the first connecting member 3, as... Figure 6 The length of the locking groove 311 can be extended to a certain length close to the insertion direction so that after the second locking part 41 is inserted into the locking groove 311, there will be no accidental rotation unlocking problem. Figure 7 When locked, as the first pipe fitting 1 and the second pipe fitting 2 extend relative to each other, the first connecting piece 3 and the second connecting piece 4 move relative to each other, and the second locking part 41 moves into the first locking part 31 to achieve locking; when unlocked, as... Figure 8By rotating the first connector 3 counterclockwise (or clockwise in other embodiments), the first connector 3 and the second connector 4 can be unlocked. Furthermore, if the locking groove 311 has a certain axial extension length, during unlocking, the first tube 1 and the second tube 2 are first pulled out a certain distance so that the second locking part 41 is located at the connection between the locking groove 311 and the unlocking groove 321. Then, unlocking is achieved by rotation, further ensuring the accuracy and reliability of the locking position. By setting the circumferential dimensions of the locking groove 311 and the unlocking groove 321, the rotation angle during unlocking can be controlled. In this embodiment, a relative rotation of 10° between the first tube 1 and the second tube 2 can achieve unlocking. After unlocking, relative axial movement disengages the first connector 3 and the second connector 4, allowing the second tube 2 to be completely retracted into the first tube 1.

[0056] In some embodiments, the depth of the locking groove 311 is greater than the depth of the unlocking groove 321. The unlocking groove 321 includes a first unlocking groove 3211 and a second unlocking groove 3212 arranged radially. The connection between the first unlocking groove 3211 and the locking groove 311 is smoothly arranged, and the second unlocking groove 3212 is smoothly arranged with the first unlocking groove 3211. One end of the second unlocking groove 3212, which is away from the first unlocking groove 3211, is smoothly arranged with the inner wall of the first connecting member 3. "Smoothly arranged" means that the two parts are connected by a bevel, such as the beveled connection between the end of the second unlocking groove 3212, which is away from the first unlocking groove 3211, and the inner wall of the first connecting member 3.

[0057] like Figure 5 As shown, on the inner wall of the first connector 3, the depth of the locking groove 311 is greater than the depth of the unlocking groove 321. When the second locking part 41 is located in the locking groove 311, the second locking part 41 fully expands elastically under its own elastic action and is inserted into the locking groove 311 to achieve locking. When the second locking part 41 rotates from the locking groove 311 to the unlocking groove 321, the second locking part 41 gradually compresses elastically, and when it reaches the unlocking groove 321, the compression deformation reaches its minimum value to achieve unlocking. Furthermore, in order to limit the rotation unlocking angle of the second locking part 41 and improve the unlocking efficiency, such as... Figure 9 and Figure 10 As shown, the end of the unlocking groove 321 furthest from the locking groove 311 in the circumferential direction has a limiting step 322 between it and the inner wall of the first connecting member 3. When the second locking part 41 rotates to the position of the limiting step 322, it is stopped. At this time, the second tube 2 is pushed closer to the first tube 1 in the axial direction, achieving the final separation after unlocking. Specifically, as Figure 5The first unlocking groove 3211 is circumferentially connected to the locking groove 311 and forms a limiting step 322 with the inner wall of the first connector 3. The second unlocking groove 3212 is located in the unlocking and separation direction of the first unlocking groove 3211 along the axial direction. The connection between the first unlocking groove 3211 and the locking groove 311 is smoothly arranged so that the second locking part 41 can rotate smoothly to unlock. The connection between the first unlocking groove 3211 and the second unlocking groove 3212 is smoothly transitioned so that the second locking part 41 can move smoothly from the first unlocking groove 3211 to the second unlocking groove 3212 to achieve final unlocking and separation.

[0058] In some embodiments, the first connector 3 is provided with a guide channel 33, and the second locking part 41 can slide along the guide channel 33 to enter the locking groove 311.

[0059] like Figure 9 As shown, the insertion end of the first connector 3 is provided with multiple guide channels 33 along the circumferential direction to cooperate with the second locking part 41. When the second locking part 41 is provided with two protrusions, four guide channels 33 are provided accordingly, so that the two protrusions can slide along the guide channels 33 to enter the locking groove 311. By providing guide channels 33, the first connector 3 and the second connector 4 do not need to be aligned during locking, and the second locking part 41 can quickly slide into the locking groove 311 to lock. The guide channels 33 are flared to facilitate the quick sliding of the second locking part 41. The guide channels 33 and the locking groove 311 are connected and coaxially arranged along the axial direction of the first connector 3, so that the first tube 1 and the second tube 2 can achieve quick locking through relative axial movement during locking.

[0060] In some embodiments, the sidewall of the guide channel 33 is a smooth surface, and the width of the guide channel 33 gradually decreases along the insertion direction of the second connector 4, and the minimum width of the guide channel 33 is not less than the width of the locking groove 311.

[0061] Along the circumferential direction, the width L1 of the unlocking groove 321 is greater than the width L2 of the second locking part 41.

[0062] For example Figure 11 The middle arrow indicates the insertion and locking direction of the second locking part 41. The width of the guide channel 33 gradually decreases, and the sidewalls of the insertion ends of adjacent guide channels 33 have a rounded transition, facilitating the second locking part 41 to enter either guide channel 33 and quickly slide into the locking groove 311 and lock. The width of the end of the guide channel 33 near the locking groove 311 is not less than the width of the second locking part 41, and not less than the width of the locking groove 311, ensuring smooth sliding and guidance of the second locking part 41. For example... Figure 10 and Figure 12Along the circumferential direction of the first connector 3 or the second connector 4, the width of the unlocking groove 321 is greater than the width of the second locking part 41, ensuring that the second locking part 41 can completely leave the locking groove 311 to unlock during the rotation unlocking process, and facilitating the smooth sliding out of the second locking part 41 during axial movement.

[0063] In some embodiments, a first guide slope 34 is provided between the guide channel 33 and the locking groove 311. The first guide slope 34 has a first distance between one end near the guide channel 33 and the axis of the first connector 3, and a second distance between the other end near the locking groove 311 and the axis of the first connector 3. The first distance is greater than the second distance.

[0064] The second locking part 41 has a second guide slope 411 at one end near the first connector 3. There is a third distance between the end of the second guide slope 411 near the first connector 3 and the axis of the second connector 4. There is a fourth distance between the end of the second guide slope 411 away from the first connector 3 and the axis of the second connector 4. The third distance is less than the fourth distance.

[0065] like Figure 9 and Figure 10 The guide channel 33 penetrates the side wall of the first connector 3, and the first guide slope 34 is provided on the inner side wall of the first connector 3 to guide the second locking part 41 into the first connector 3. Under the action of the first guide slope 34, the second locking part 41 is elastically compressed and gradually slides into the first connector 3 so as to smoothly slide into the locking groove 311. Figure 12 The second guide slope 411 is located at the end of the second locking part 41 near the first connecting member 3. When the second connecting member 4 is inserted and locked near the first connecting member 3, the second guide slope 411 facilitates the gradual elastic compression of the second locking part 41, allowing it to slide into the first connecting member 3. Figure 11 When the first guide slope 34 and the second guide slope 411 are provided at the same time, the two can cooperate with each other during insertion, which can further improve the insertion speed of the second locking part 41 and reduce resistance.

[0066] In some embodiments, the second connector 4 is provided with a first spring 42, and a second locking part 41 is provided at the free end of the first spring 42, wherein the width of the free end of the first spring 42 is smaller than the width of its fixed end.

[0067] like Figure 13The second connector 4 has a slit on its side wall, which connects the insertion end of the second connector 4 and the inner and outer sides of the second connector 4, thus forming a first spring piece 42 between the two slits. A second locking part 41 is disposed at the free end of the first spring piece 42, realizing an elastic second locking part 41. During the insertion and locking process, the first spring piece 42 and the second locking part 41 deform elastically synchronously, resulting in a simple structure that is easy to manufacture. In other embodiments, the elastic performance of the second locking part 41 can also be achieved by using a protrusion made of elastic material or by elastically mounting the protrusion on the outer wall of the second connector 4, which is not limited to this specific method. In this embodiment, the width of the free end of the first spring piece 42 is smaller than the width of the fixed end, which facilitates the rapid elastic deformation and rapid reset of the free end of the first spring piece 42. The fixed end provides a stable connection, which helps to improve the service life of the first spring piece 42 and increase the elastic force of the first spring piece 42.

[0068] In some embodiments, the side wall of the second pipe 2 is provided with an opening 21 to avoid the second locking part 41. When the second connector 4 is fixed inside the second pipe 2, the second locking part 41 passes through the opening 21 and protrudes from the outer wall of the second pipe 2.

[0069] like Figure 15 As shown, in this embodiment, the opening 21 is a long groove. When the second connector 4 is connected to the second pipe 2, the second locking part 41 can slide along the long groove. The second locking part 41 protrudes from the outer wall of the second pipe 2 to facilitate locking and unlocking with the first connector 3. In other embodiments, the opening 21 can also be a through hole. When the second locking part 41 is installed, it contracts under the action of elasticity and inserts into the second pipe 2. It elastically expands at the opening 21 and protrudes from the outer wall of the second pipe 2, thereby achieving a fixed connection between the second connector 4 and the second pipe 2, and facilitating disassembly.

[0070] In some embodiments, one of the first connector 3 and the first pipe 1 is provided with a first elastic buckle 35 and the other is provided with a first positioning hole 11. The first elastic buckle 35 and the first positioning hole 11 are engaged and locked together.

[0071] In the second connector 4 and the second pipe 2, one is provided with a second elastic buckle 43 and the other is provided with a second positioning hole 22. The second elastic buckle 43 and the second positioning hole 22 are engaged and locked together.

[0072] like Figure 14 and Figure 15As shown, at least two first elastic buckles 35 are evenly arranged on the outer wall of the first connector 3, and a first positioning hole 11 is provided on the side wall of the first pipe 1 to cooperate with the first elastic buckle 35. When the first connector 3 is installed, it is inserted into the first pipe 1, and the first elastic buckle 35 is engaged in the first positioning hole 11, thereby achieving a fixed installation of the first connector 3 and the first pipe 1. Two or more second positioning holes 22 are evenly arranged on the second pipe 2, and two or more second elastic buckles 43 are evenly arranged on the second connector 4. When installed, the second connector 4 is inserted into the second pipe 2, and the second elastic buckle 43 is engaged in the second positioning hole 22, thereby achieving a fixed installation of the second connector 4 and the second pipe 2. It can be understood that the positions of the first elastic buckle 35 and the first positioning hole 11 are interchangeable, and the positions of the second elastic buckle 43 and the second positioning hole 22 are interchangeable. In other embodiments, the first connector 3 and the first pipe 1 can also be fixed by means of bonding, screwing or welding, and the second connector 4 and the second pipe 2 can also be fixed by means of bonding, screwing or welding.

[0073] In some embodiments, the first elastic buckle 35 is provided with a third guide slope 351, which is configured to guide the first connector 3 into the first pipe 1; the second elastic buckle 43 is provided with a fourth guide slope 431, which is configured to guide the second connector 4 into the second pipe 2.

[0074] The first elastic buckle 35 is disposed at one end of the first connector 3 near the second connector 4, and the other end of the first connector 3 is provided with a first annular protrusion 36; the second elastic buckle 43 is disposed in the middle of the second connector 4, and the end of the second connector 4 opposite to the second locking part 41 is provided with a second annular protrusion 45.

[0075] like Figure 14 As shown, the first elastic buckle 35 is positioned in the middle of two adjacent guide channels 33. The portion between the two guide channels 33 forms a spring-loaded structure, which provides elastic force to the first elastic buckle 35. When the first connector 3 is inserted into the first pipe fitting 1 for installation, the portion between the two guide channels 33 can elastically deform synchronously with the first elastic buckle 35, facilitating the installation of the first connector 3 and providing sufficient elastic force after installation and engagement. The first annular protrusion 36 on the first connector 3 protrudes from the outer wall of the first connector 3. After the first connector 3 is inserted into the first pipe fitting 1, the first annular protrusion 36 can abut against the end face of the first pipe fitting 1, preventing the first connector 3 from sliding into the interior of the first pipe fitting 1. The end face of the first elastic buckle 35 is provided with a third guide slope 351, which facilitates the insertion of the first connector 3 into the first pipe fitting 1 for installation and fixation. The first annular protrusion 36 can be a continuous or intermittent protrusion structure, used to limit the length of the first connector 3 inserted into the first pipe fitting 1.

[0076] like Figure 13 The second elastic buckle 43 is disposed on the side wall of the second connector 4. The side wall of the second connector 4 is provided with a second spring piece 44, which is obtained by opening a U-shaped slit in the side wall of the second connector 4. The second elastic buckle 43 is disposed on the second spring piece 44, which can provide elastic force for the second elastic buckle 43. When the second connector 4 is inserted into the second pipe 2 for installation, the second spring piece 44 and the second elastic buckle 43 deform elastically in sync, which is conducive to the installation of the second connector 4 and can provide sufficient elastic force after installation and snapping. The second annular protrusion 45 on the second connector 4 protrudes from the outer wall of the second connector 4. After the second connector 4 is inserted into the second pipe 2, the second annular protrusion 45 can abut against the end face of the second pipe 2 to prevent the second connector 4 from sliding into the interior of the second pipe 2. The end face of the second elastic buckle 43 is provided with a fourth guide slope 431, which facilitates the insertion of the second connector 4 into the second pipe 2 for installation and fixation. The second annular protrusion 45 can be a continuous or discontinuous protrusion structure, used to limit the length of the second connector 4 inserted into the second tube 2.

[0077] The pipe fitting connection structure provided by this utility model can quickly lock and unlock the first pipe fitting 1 and the second pipe fitting 2. Because a guide channel 33 is provided on the first connector 3, there is no need to align the pipe fittings during locking; simply pulling the first pipe fitting 1 and the second pipe fitting 2 will extend and lock quickly. During unlocking, there is no need to manually press the second locking part 41; simply rotating the first pipe fitting 1 and the second pipe fitting 2 by a certain angle, such as about 10°, will unlock them. After unlocking, the second pipe fitting 2 can be directly pushed into the first pipe fitting 1 to retract. The overall structure is simple, easy to operate, and has high locking and unlocking efficiency.

[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pipe fitting connection structure, characterized in that, include: First pipe fitting (1); The second pipe fitting (2) is sleeved with the first pipe fitting (1); The first connector (3) is connected to the first pipe (1), and the first connector (3) is provided with a first locking part (31) and an unlocking part (32); The second connector (4) is connected to the second pipe (2), and the second connector (4) is provided with a second locking part (41) with elasticity; When locked, the second connector (4) is inserted into the first connector (3), and the second locking part (41) enters the first locking part (31) and locks the first connector (3) and the second connector (4); When unlocking, the second connector (4) is rotated to drive the second locking part (41) from the first locking part (31) into the unlocking part (32), and the first connector (3) and the second connector (4) are unlocked.

2. The pipe fitting connection structure according to claim 1, characterized in that, The first pipe fitting (1) is an outer pipe, and the second pipe fitting (2) is an inner pipe; the first locking part (31) includes a locking groove (311), and the unlocking part (32) includes an unlocking groove (321). The locking groove (311) and the unlocking groove (321) are disposed on the inner wall of the first connector (3) and are connected along the circumferential direction of the first connector (3); the second locking part (41) protrudes from the outer wall of the second connector (4).

3. The pipe fitting connection structure according to claim 2, characterized in that, The depth of the locking groove (311) is greater than the depth of the unlocking groove (321). The unlocking groove (321) includes a first unlocking groove (3211) and a second unlocking groove (3212) arranged radially. The connection between the first unlocking groove (3211) and the locking groove (311) is smoothly arranged. The second unlocking groove (3212) is smoothly arranged with the first unlocking groove (3211). One end of the second unlocking groove (3212) away from the first unlocking groove (3211) is smoothly arranged with the inner wall of the first connector (3).

4. The pipe fitting connection structure according to claim 2, characterized in that, The first connector (3) is provided with a guide channel (33), and the second locking part (41) can slide along the guide channel (33) to enter the locking groove (311).

5. The pipe fitting connection structure according to claim 4, characterized in that, The sidewall of the guide channel (33) is a smooth surface. Along the insertion direction of the second connector (4), the width of the guide channel (33) gradually decreases, and the minimum width of the guide channel (33) is not less than the width of the locking groove (311). And / or, along the circumferential direction, the width L1 of the unlocking groove (321) is greater than the width L2 of the second locking part (41).

6. The pipe fitting connection structure according to claim 5, characterized in that, A first guide slope (34) is provided between the guide channel (33) and the locking groove (311). The first guide slope (34) has a first distance between the end of the first guide slope (34) near the guide channel (33) and the axis of the first connector (3). The first distance is greater than the second distance. And / or, The second locking part (41) has a second guide slope (411) at one end near the first connector (3). The second guide slope (411) has a third distance between the end near the first connector (3) and the axis of the second connector (4). The second guide slope (411) has a fourth distance between the end away from the first connector (3) and the axis of the second connector (4). The third distance is smaller than the fourth distance.

7. The pipe fitting connection structure according to claim 1, characterized in that, The second connector (4) is provided with a first spring (42), and the second locking part (41) is provided at the free end of the first spring (42). The width of the free end of the first spring (42) is smaller than the width of its fixed end.

8. The pipe fitting connection structure according to claim 1, characterized in that, The side wall of the second pipe fitting (2) is provided with an opening (21) to avoid the second locking part (41). When the second connector (4) is fixed inside the second pipe fitting (2), the second locking part (41) passes through the opening (21) and protrudes from the outer wall of the second pipe fitting (2).

9. The pipe fitting connection structure according to claim 1, characterized in that, In the first connector (3) and the first pipe fitting (1), one is provided with a first elastic buckle (35) and the other is provided with a first positioning hole (11). The first elastic buckle (35) and the first positioning hole (11) are engaged and locked together. In the second connector (4) and the second pipe (2), one is provided with a second elastic buckle (43) and the other is provided with a second positioning hole (22). The second elastic buckle (43) and the second positioning hole (22) are engaged and locked together.

10. The pipe fitting connection structure according to claim 9, characterized in that, The first elastic buckle (35) is provided with a third guide slope (351), which is configured to guide the first connector (3) to be inserted into the first pipe fitting (1); the second elastic buckle (43) is provided with a fourth guide slope (431), which is configured to guide the second connector (4) to be inserted into the second pipe fitting (2); And / or, the first elastic buckle (35) is disposed at one end of the first connector (3) near the second connector (4), and the other end of the first connector (3) is provided with a first annular protrusion (36); the second elastic buckle (43) is disposed in the middle of the second connector (4), and the end of the second connector (4) opposite to the second locking part (41) is provided with a second annular protrusion (45).

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