Quick assembling and disassembling structure for pipe fitting

Abstract

The utility model discloses a pipe fitting quick-mounting and quick-dismounting structure which comprises an external connection seat, an external pipeline, a limiting clamping seat, a connecting rod, a connecting rod, a connecting rod, a connecting rod and a connecting rod, wherein one end of the external connection seat is communicated with an external pipeline; the buckle connector is arranged on the periphery of an inner inserting pipe section in a sleeving mode, the buckle connector comprises a plurality of wing-shaped elastic pieces extending in an inclined mode, and a piece body of each wing-shaped elastic piece is provided with a protruding part; when all the wing-shaped elastic pieces are elastically bent inwards, the inner inserting pipe section and the buckle connector are inserted into the outer connecting base, so that the end of the inner inserting pipe section is communicated with the outer pipeline, at the moment, the wing-shaped elastic pieces are restored, and protruding parts of piece bodies of the wing-shaped elastic pieces are connected with the limiting clamping base in a clamped mode. By means of the structure, an operator can conveniently complete quick connection and disassembly between the two pipe fittings, the two connected pipe fittings are not prone to falling off, and the efficiency of pipeline connection work is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pipe fitting connection, more specifically, the utility model relates to a pipe fitting quick mounting and quick dismounting structure. BACKGROUND

[0002] In daily life, agricultural production, water and electricity construction, it is often necessary to temporarily connect two water pipes to extend the length of the pipeline, and the connection between the pipes is generally carried out by using a threaded coupling method, a plurality of components such as a threaded transition piece and a sealing ring are used, and the two water pipes are connected by manual screwing, this method needs to manually hold the two pipes and screw them, which is not efficient and inconvenient, and leakage may occur after connection, a Chinese patent with application publication number CN110220060A discloses a quick dismounting structure of a pipeline, which uses pipe fittings with ratchet teeth and bosses at both pipe openings to complete the connection by screwing and pressing, but the ratchet teeth and boss structure in this method are thin and easy to be damaged, and the connection method needs to be pressed and screwed to complete the connection, which requires a certain operation time, and there is a possibility that the two connected pipes may be disconnected by external force during use.

[0003] In the pipeline connection work, one of the pipelines is usually a fixed pipe opening for device water inlet, device water outlet or the like, and since such a pipe opening is generally located at the rear of the device, high place or blocked by other devices, the operation space for connection is limited and it is difficult to complete the radial centering of the to-be-connected pipeline, at this time, since the operator cannot directly observe the pipeline connection position, it is difficult for a single person to complete the centering of the two pipelines without the aid of other instruments, and it is difficult to quickly complete the connection of the two pipelines.

[0004] The conventional pipeline connection structure usually adopts screwing or pressing for operation, and the efficiency of pipe connection and disconnection is not high, and it is also difficult to be applied to the pipeline quick connection work in complex environment, and the connected pipe fittings are also easy to be disconnected, therefore, a new type of pipe fitting quick mounting and quick dismounting structure is urgently needed, which can enable the operator to quickly complete the mounting and dismounting, and the pipe fitting connection position is not easy to be disconnected. UTILITY MODEL CONTENTS

[0005] The utility model provides a pipe fitting quick mounting and quick dismounting structure, the operator can quickly complete the insertion and mounting of two pipe fittings in the pipe connection operation, the efficiency of pipe fitting connection is improved, and the pipe fittings are not easy to be disconnected under the action of external force, when the pipe fittings need to be separated, the operator only needs to hold the rear section of the wing-shaped elastic sheet extending out of the limiting clamping seat and pull it out, so that the two pipelines can be easily separated.

[0006] In order to realize these objects and other advantages of the present application, a pipe fast assembly and disassembly structure is provided, comprising: an external connector, one end of which is communicated with an external pipeline and the other end is connected with a limiting seat on the outside; a buckle connector, which is sleeved on the outer periphery of an inner pipe segment, the buckle connector 3 comprising a plurality of obliquely extending wing-shaped elastic sheets, the sheet body of the wing-shaped elastic sheet being provided with a protruding portion; wherein, when the wing-shaped elastic sheet is elastically bent inward, the inner pipe segment and the buckle connector are inserted into the external connector, so that the end of the inner pipe segment is communicated with the external pipeline, at this time the wing-shaped elastic sheet is restored, and the protruding portion of the sheet body of the wing-shaped elastic sheet is clamped with the limiting seat.

[0007] Preferably, the inner diameter of the external connector is greater than the outer diameter of the inner pipe segment, one end of the inner pipe segment is a socket head with an outer diameter matching the inner diameter of the external connector, the buckle connector further comprises a buckle sleeve ring, the buckle sleeve ring is rotatably sleeved on the outer periphery of the inner pipe segment, one end of the buckle sleeve ring abuts against the socket head, and one end of the wing-shaped elastic sheet is fixed to the side surface of the buckle sleeve ring.

[0008] Preferably, the limiting seat is a circular ring type, the external connector, the limiting seat and the inner pipe segment are coaxially arranged, wherein when the wing-shaped elastic sheet protruding portion of the buckle connector is clamped between the external connector and the limiting seat, the rotating range of the buckle connector on the inner pipe segment is ±360°.

[0009] Preferably, the end of the external connector towards the inner pipe segment gradually expands in diameter along the axial direction, forming an external connector flared mouth.

[0010] Preferably, the outer periphery of the inner pipe segment is provided with a buckle limiting ring, the buckle sleeve ring is rotatably sleeved on the pipe body of the inner pipe segment between the socket head and the buckle limiting ring, and the two end surfaces of the buckle sleeve ring respectively abut against the socket head and the buckle limiting ring.

[0011] Preferably, the two sides of the buckle sleeve ring are connected with two wing-shaped elastic sheets in a spreader type, the sheet body of the wing-shaped elastic sheet is outwardly convex with a tapered wedge block with an inclined outer wall, wherein when the buckle connector passes through the limiting seat towards the external connector, the outer wall of the tapered wedge block is acted on by the ring body of the limiting seat to make the wing-shaped elastic sheet continuously bend downward, and when the tapered wedge block passes through the limiting seat, the wing-shaped elastic sheet is reset, and the bottom of the tapered wedge block is clamped in the limiting seat to check the buckle connector.

[0012] Preferably, the two ring type end surfaces of the limiting seat are flat, and one end of the inner wall of the ring body of the limiting seat away from the external connector is provided with an inclined guide angle.

[0013] Preferably, the side wall of the socket head is provided with a plurality of ring type grooves in the circumferential direction, and one sealing ring is sleeved on each ring type groove.

[0014] Preferably, the snap-on collar is C-shaped, with an inner diameter equal to the outer diameter of the inner tube segment, and the snap-on collar is snap-fitted onto the inner tube segment from the opening thereof.

[0015] Preferably, the C-shaped opening of the snap-on collar extends outwardly at both ends with two parallel guide pieces, and the distance between the two guide pieces is less than the outer diameter of the inner tube segment.

[0016] The utility model has at least the following beneficial effects:

[0017] First, the utility model adopts the design that the external socket and the snap-on connector, i.e. the inner tube segment, are matched and plugged, wherein the external socket is communicated with one side pipeline, the inner tube segment is communicated with another pipeline, the snap-on connector with the wing-shaped elastic sheet is sleeved on the inner tube segment, when the pipe is quickly inserted, the operator holds the plurality of wing-shaped elastic sheets with his hand to make them elastically bent, at this time, the protruding part on the wing-shaped elastic sheet is not blocked by the limiting clamp, then the inner tube segment is sent forward from the limiting clamp, the socket is inserted into the sleeve socket, at the same time, the snap-on connector passes through the limiting clamp, after the wing-shaped elastic sheet is loosened, the protruding part on the wing-shaped elastic sheet forms the clamping relationship with the limiting clamp, the snap-on connector is fixed between the external socket and the limiting clamp, and the inner tube segment is not taken out of the external socket due to the action of the snap-on connector.

[0018] Second, when the external socket and the inner tube segment are in the socket state, the sheet body of the wing-shaped elastic sheet is stretched out from the limiting clamp, when it is necessary to quickly pull out, the operator holds the outer stretching section of all the wing-shaped elastic sheets with his hand, at this time, the wing-shaped elastic sheet is elastically bent downward, the protruding part thereon is disengaged from the clamping relationship with the limiting clamp, and the operator can conveniently pull out the inner tube segment and the snap-on connector from the external socket.

[0019] Third, when the utility model is quickly installed, the operator only needs to firstly complete the communication of the external socket with one of the pipeline openings, then stretches the front end of the inner tube segment into the limiting clamp at a certain angle and pushes it forward, the snap-on connector forms the guiding action in the process of passing through the limiting clamp, the user only needs to continuously send the inner tube segment forward to complete the connection and fixation of the two pipelines, without the accurate centering of the two pipelines by the operator and other operations of the operator, in the case that the operator cannot directly observe the connection position and the operation space is limited, the problems of misoperation or inconvenient operation do not occur.

[0020] Fourth, when the utility model is quickly disassembled, the operator only needs to hold the outer stretching section of the wing-shaped elastic sheet with one hand to pull it out, the snap-on connector can be freely rotated around the inner tube segment between the limiting clamp and the external socket, in some special environment, the operator can firstly rotate the snap-on connector to a suitable angle for holding the wing-shaped elastic sheet with his hand and then pull it out, in theory, as long as the operator can touch the place with one hand, the quick insertion operation can be completed, and the overall operation is more flexible.

[0021] Other advantages, objects, and features of the present utility model will be partly illustrated by the following description, and will be partly understood by those skilled in the art through research and practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the schematic diagram of the external socket and the internal pipe section in one of the technical schemes of the present utility model.

[0023] Figure 2 It is the schematic diagram of the internal pipe section with buckle joint before insertion in one of the technical schemes of the present utility model.

[0024] Figure 3 It is the schematic diagram of the internal pipe section after insertion in one of the technical schemes of the present utility model.

[0025] Figure 4 It is the schematic diagram of the external socket in one of the technical schemes of the present utility model.

[0026] Figure 5 It is the schematic diagram of the cross section of the external socket in one of the technical schemes of the present utility model.

[0027] Figure 6 It is the schematic diagram of the internal pipe section in one of the technical schemes of the present utility model.

[0028] Figure 7 It is the schematic diagram of the buckle joint in one of the technical schemes of the present utility model.

[0029] Figure 8 It is the three-way schematic diagram of the buckle joint in one of the technical schemes of the present utility model.

[0030] Figure 9 It is the cross section schematic diagram of the external socket and the internal pipe section in one of the technical schemes of the present utility model.

[0031] Figure 10 It is the schematic diagram of the buckle joint and the limiting holder in one of the technical schemes of the present utility model.

[0032] Figure 11 It is the schematic diagram of the internal pipe section insertion process in one of the technical schemes of the present utility model.

[0033] Legend: 1-external seat, 11-limiting seat, 111-limiting end face, 112-guide angle, 12-connection structure, 10-external seat horn, 13-insertion tube, 130-insertion tube end face, 131-ring type protrusion, 132-ball type protrusion, 2-inner insertion tube section, 21-buckle limiting ring, 22-socket, 221-ring type groove, 3-buckle joint, 31-buckle sleeve ring, 311-ring block, 312-guide piece, 32-wing type elastic piece, 321-cone wedge, 4-sealing ring, 5-outer pipeline. DETAILED DESCRIPTION

[0034] The utility model will be made further detailed description in combination with the drawings, to enable the person skilled in the art to implement with the description text.

[0035] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0036] It should be noted that the experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "set" should be understood in a broad sense, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances. The orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] As Figures 1-11 shown, the utility model embodiment provides a pipe fitting quick mounting and quick dismounting structure, include: external seat 1, its one end has the outer pipeline 5, the other end outside is connected with the limiting seat 11 of card buckle;Buckle joint 3, the buckle joint 3 is set on the outer periphery of an inner insertion tube section 2, and buckle joint 3 includes multiple obliquely extended wing type elastic pieces 32, the piece body of wing type elastic piece 32 is provided with a protruding part;Wherein, when wing type elastic piece 32 is elastically bent inwards, insert inner insertion tube section 2 and buckle joint 3 into external seat 1, so that the end of inner insertion tube section 2 is communicated with outer pipeline 5, at this time, restore wing type elastic piece 32, and the protruding part of the piece body of wing type elastic piece 32 is clamped with limiting seat 11.

[0038] In the technical solution, as shown in Figures 1-4 The one end of the outer connector 1 axially extends out of the insertion pipe 13, which is inserted into the outer pipe 5 to be connected. The outer diameter of the insertion pipe 13 is the same as the inner diameter of the outer pipe 5. When the outer pipe 5 is a hose, the outer periphery of the insertion pipe 13 can be provided with multiple annular protrusions 131 and multiple spherical protrusions 132 to make it more difficult for the insertion pipe 13 to come out of the outer pipe 5. The other end of the outer connector 1 is fixedly connected with the limiting seat 11 through the connecting structure 12. The connecting structure 12 can be a stick-shaped or sheet-shaped structure, as shown in Figures 4-5 The connecting structure 12 is four arc-shaped sheets. Optionally, the limiting seat 11 can be a circular ring or a ring of other shapes.

[0039] In the technical solution, the inner insertion pipe section 2 can be another water pipe to be connected to the outer pipe 5 or a transition pipe connected to another water pipe. The buckle connector 3 can be rotatably sleeved on the pipe body of the inner insertion pipe section 2 and axially fixed with the inner insertion pipe section 2 by a clasp ring or other measures. The side of the buckle connector 3 extends out of a plurality of pairs of axisymmetric wing-shaped elastic sheets 32. The protrusions formed in the middle of the sheet body of the wing-shaped elastic sheet 32 can be in various forms such as ladder-shaped, tab-shaped, and tenon-shaped. The protrusions make the buckle connector 3 unable to pass through the limiting seat 11 from any direction when not tightly held. When the operator holds the rear sheet body of all the wing-shaped elastic sheets 32, the wing-shaped elastic sheets 32 are bent to make the protrusions retract. At this time, the buckle connector 3 can pass through the limiting seat 11 with the inner insertion pipe section 2, so that the inner insertion pipe section 2 is inserted into the outer connector 1 and communicates with the outer pipe 5. At this time, after the protrusions in the middle of the wing-shaped elastic sheet 32 pass through the limiting seat 11, the operator releases the wing-shaped elastic sheet 32. After the wing-shaped elastic sheet 32 restores, the protrusions on the sheet body just form a clamping connection with the limiting end surface 110 of the limiting seat 11 facing the outer connector 1. The buckle connector 3 is clamped between the limiting seat 11 and the outer connector 1 and cannot move. The inner insertion pipe section 2 cannot come out of the outer connector 1.

[0040] In the technical solution, since the protrusions are arranged at the middle position of the wing-shaped elastic sheet 32, the rear half of the wing-shaped elastic sheet 32 passes out of the ring of the limiting seat 11. When the pipe quick-release operation needs to be completed, the operator holds the rear half of all the wing-shaped elastic sheets 32 exposed to make the wing-shaped elastic sheets 32 bend downward, so as to release the clamping relationship between the protrusions of the wing-shaped elastic sheet 32 and the limiting seat 11. Thus, the inner insertion pipe section 2 can be easily pulled out of the outer connector 1.

[0041] In the technical solution, the operator can simply hold the wing-shaped elastic sheet 32 to complete the insertion and pulling of the inner insertion pipe section 2 and the outer connector 1. The operation is simple, and the connected inner insertion pipe section 2 will not easily come out of the outer connector 1. The structure has the advantages of simple operation and reliable connection.

[0042] In another technical solution, the inner diameter of the outer sleeve 1 is greater than the outer diameter of the inner pipe segment 2, one end of the inner pipe segment 2 is a socket head 22 with an outer diameter matching the inner diameter of the outer sleeve 1, the buckle joint 3 further comprises a buckle collar 31, the buckle collar 31 is sleeved on the outer periphery of the inner pipe segment 2, one end of the buckle collar 31 abuts against the socket head 22, and one end of the wing-shaped elastic sheet 32 is fixed to the side surface of the buckle collar 31, as shown in the figure. Figures 6-7 The buckle collar 31 extends circumferentially at the end of the socket head 22, and the ring-shaped block 311 at one end of the buckle collar 31 abuts against the ring-shaped end surface of the socket head 22, and the other end surface is fixed with two symmetrical wing-shaped elastic sheets 32. The intersection position of the outer sleeve 1 and the insertion pipe 13 has a reduced diameter, generating an insertion pipe end surface 130. The outer diameter of the socket head 22 is equal to the inner diameter of the outer sleeve 1. After the socket head 22 is inserted into the outer sleeve 1, the front end surface abuts against the insertion pipe end surface 130, and the rear end surface is abutted by the buckle collar 31. The socket head 22 does not shake in the outer sleeve 1.

[0043] In another technical solution, the limiting clamp 11 is a circular ring type, the outer sleeve 1, the limiting clamp 11 and the inner pipe segment 2 are coaxially arranged, wherein when the protruding part of the wing-shaped elastic sheet 32 of the buckle joint 3 is clamped between the outer sleeve 1 and the limiting clamp 11, the rotating range of the buckle joint 3 on the inner pipe segment 2 is ±360°. In this technical solution, as shown in the figure, the outer sleeve, the inner pipe segment 2 and the limiting clamp 11 are coaxial, and when the buckle joint 3 rotates around the inner pipe segment 2, the protruding part on the wing-shaped elastic sheet 32 can always be in abutting relationship with the limiting end surface 110. During the rotation of the buckle joint 3, the connecting structure 12 between the outer sleeve 1 and the limiting clamp 11 does not conflict with the protruding part of the wing-shaped elastic sheet 32. The operator can insert the inner pipe segment 2 into the outer sleeve pipe 13 at any rotating angle, and when pulling out the inner pipe segment 2, the wing-shaped elastic sheet 32 can be rotated to an angle suitable for holding and then the inner pipe segment 2 is pulled out. Compared with the conventional rotary pipe joint device, the operator does not need to consider the corresponding angle when inserting the inner pipe segment 2 into the outer sleeve 1, and can rotate the buckle joint 3 to an angle suitable for holding the wing-shaped elastic sheet 32 when pulling out the inner pipe segment 2. Figure 10

[0044] In another technical solution, the end of the outer sleeve 1 towards the inner pipe segment 2 gradually expands in the axial direction, forming an outer sleeve bell mouth 10. The operator does not need to accurately center the socket head 22 and the socket 1, and the socket head 22 can be smoothly inserted into the outer sleeve 1 under the guidance of the inner wall of the outer sleeve bell mouth 10.

[0045] ​In another technical solution, a snap-fit ​​limiting ring 21 is provided on the outer periphery of the inner insertion tube section 2. The snap-fit ​​sleeve 31 is screwed onto the tube body of the inner insertion tube section 2 between the socket 22 and the snap-fit ​​limiting ring 21. The two ends of the snap-fit ​​sleeve 31 abut against the socket 22 and the snap-fit ​​limiting ring 21 respectively. The snap-fit ​​sleeve 31 is fixed in position on the inner insertion tube section 2 and is not easy to fall off, which makes it convenient for operators to complete the connection and disassembly of the fittings.

[0046] In another technical solution, the two sides of the snap-fit ​​collar 31 are connected in a figure-eight shape with two wing-shaped spring pieces 32. The front half of the wing-shaped spring piece 32 has a conical wedge block 321 with an inclined outer wall. When the snap-fit ​​connector 3 passes through the limiting seat 11 towards the outer connecting seat 1, the outer wall of the conical wedge block 321 is constrained by the ring body of the limiting seat 11, causing the wing-shaped spring piece 32 to continuously bend downward. When the conical wedge block 321 has completely passed through the limiting seat 11, the wing-shaped spring piece 32 springs back to its original position, and the bottom of the conical wedge block 321 engages with the limiting seat 11 to prevent the snap-fit ​​connector 3 from returning. Figure 11 As shown, the snap-fit ​​connector 3 is fixed on the inner tube section 2. When the snap-fit ​​connector 3 is pushed forward past the limiting seat 11, the conical wedge 321 is continuously squeezed by the limiting seat 11, causing the wing-shaped spring 32 to bend elastically. After the conical wedge 321 has completely passed through the limiting seat 11, the wing-shaped spring 32 returns to its shape, and the bottom surface of the conical wedge 321 abuts against the limiting end face 110. In this technical solution, by setting the conical wedge 321, the snap-fit ​​connector 3 can pass through the limiting seat 11 in one direction and be fixed. When performing quick connection of pipe fittings, the operator only needs to hold the inner tube section 2, roughly align it, and push the inner tube section 2 straight into the limiting seat 11 to complete the connection of the pipe fittings and automatic check, which further simplifies the difficulty of pipe fitting connection.

[0047] In another technical solution, the two annular end faces of the limiting card seat 11 are flat, and the inner wall of the limiting card seat 11 is provided with an inclined guide angle 112 at one end far from the outer connecting seat 1, such as... Figure 5 As shown, the guide angle 112 allows the snap-fit ​​connector 3 to be pushed into the limiting seat 11 at a certain angle, and automatically completes the alignment under the joint guidance of the inner wall of the limiting seat 11 and the guide angle 112, further facilitating the operator's use.

[0048] In another technical solution, the side wall of the socket 22 is provided with multiple annular grooves 221 along the circumference, and a sealing ring 4 is fitted on each annular groove 221. The sealing ring 4 can be a rubber water-stop ring made of rubber, which can effectively seal the gap between the socket 22 and the outer sleeve pipe 13.

[0049] In another technical solution, the buckle sleeve ring 31 is in the shape of C, the inner diameter is the same as the outer diameter of the inner cannula section 2, the buckle sleeve ring 31 is buckled on the tube of the inner cannula section 2 from the opening thereof, the buckle sleeve ring 31 can be conveniently buckled and removed on the inner cannula section 2, and the application is more flexible. Optionally, the C-shaped opening of the buckle sleeve ring 31 is less than 180°, and the buckle sleeve ring 31 is more difficult to fall off when buckled on the tube of the inner cannula section 2.

[0050] In another technical solution, the C-shaped opening of the buckle sleeve ring 31 extends outwardly at both ends two parallel guide pieces 312, the interval of the two guide pieces 312 is less than the outer diameter of the inner cannula section 2, and the buckle sleeve ring 31 is elastically deformed under the action of the guide pieces 312 when the inner cannula section 2 enters the buckle sleeve ring 31 from between the two guide pieces 312, and the buckle sleeve ring 31 restores the shape after the inner cannula section 2 passes through the two guide pieces 312, so that the buckle sleeve ring 31 is more difficult to fall off from the inner cannula section 2, and the sleeve effect of the buckle sleeve ring 31 on the inner cannula section 2 is better.

[0051] The number of devices and the scale of processing described herein are used to simplify the description of the present application. The application, modification and change of the present application are obvious to those skilled in the art.

[0052] Although the embodiments of the present application have been disclosed as above, it is not limited to the application and the embodiments listed in the specification, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A quick-assembly and quick-disassembly structure of a pipe fitting, characterized by comprising: The utility model relates to a kind of outer socket (1), one end of which is connected with outer pipeline (5), the other end is connected with limit card seat (11) outside;Clasp joint (3) is set on the outer periphery of inner insertion pipe section (2), and clasp joint (3) includes multiple obliquely extended airfoil spring (32), and the blade body of airfoil spring (32) is provided with protruding part;Wherein, when airfoil spring (32) is elastically bent inwards, inner insertion pipe section (2) and clasp joint (3) are inserted into outer socket (1), so that the end of inner insertion pipe section (2) is communicated with outer pipeline (5), at this time, airfoil spring (32) is restored, and the protruding part of the blade body of airfoil spring (32) is clamped with limit card seat (11). The inner diameter of the outer socket (1) is greater than the outer diameter of the inner insertion pipe section (2), one end of the inner insertion pipe section (2) is a socket head (22) with an outer diameter matching the inner diameter of the outer socket (1), the clasp joint (3) further includes a clasp sleeve ring (31), the clasp sleeve ring (31) is rotatably sleeved on the outer periphery of the inner insertion pipe section (2), one end of the clasp sleeve ring (31) abuts against the socket head (22), and one end of the airfoil spring (32) is fixed to the side surface of the clasp sleeve ring (31). The limit card seat (11) is a circular ring, the outer socket (1), the limit card seat (11), and the inner insertion pipe section (2) are coaxially arranged, wherein, when the protruding part of the airfoil spring (32) of the clasp joint (3) is clamped between the outer socket (1) and the limit card seat (11), the clasp joint (3) can rotate on the inner insertion pipe section (2) within a range of ±360°. The end of the outer socket (1) towards the inner insertion pipe section (2) gradually expands in diameter along the axial direction, forming an outer socket flared mouth (10).

2. The quick-mounting and quick-detaching structure of a pipe fitting according to claim 1, wherein The outer periphery of the inner insertion pipe section (2) is provided with a clasp limiting ring (21), the clasp sleeve ring (31) is rotatably sleeved on the pipe body of the inner insertion pipe section (2) between the socket head (22) and the clasp limiting ring (21), and the two end surfaces of the clasp sleeve ring (31) respectively abut against the socket head (22) and the clasp limiting ring (21).

3. The quick-mounting and quick-detaching structure of a pipe fitting according to claim 1, wherein The two sides of the clasp sleeve ring (31) are connected with two airfoil springs (32) in a spreader shape, the blade body of the airfoil spring (32) has an outer wall inclined taper surface wedge (321) protruding outward in the first half, wherein, when the clasp joint (3) passes through the limit card seat (11) towards the outer socket (1), the outer wall of the taper surface wedge (321) is acted on by the ring body of the limit card seat (11) to continuously bend the airfoil spring (32) downwards, after the taper surface wedge (321) passes through the limit card seat (11), the airfoil spring (32) is reset, and the bottom of the taper surface wedge (321) is clamped in the limit card seat (11) to prevent backflow of the clasp joint (3).

4. The quick fitting and detaching structure of pipe according to claim 1, wherein, The two ring-shaped end surfaces of the limit card seat (11) are flat, and the inner wall of the ring body of the limit card seat (11) is provided with an inclined guide angle (112) away from the outer socket (1).

5. The quick fitting and detaching structure of pipe according to claim 2, wherein, The side wall of the socket head (22) is provided with a plurality of ring-shaped grooves (221) in the circumferential direction, and one sealing ring (4) is sleeved on each ring-shaped groove (221).

6. The quick fitting and detaching structure of pipe according to claim 5, wherein, ​ 7. The quick assembly and disassembly structure of pipe according to claim 6, characterized in that, ​ 8. The quick fitting and detaching structure of pipe according to claim 2, wherein, ​ 9. The quick fitting and detaching structure of pipe according to claim 2, wherein, The buckle collar (31) is C-shaped, and its inner diameter is the same as the outer diameter of the inner cannula segment (2). The buckle collar (31) is buckled on the tube of the inner cannula segment (2) from the opening thereof.

10. The quick fitting and detaching structure of pipe according to claim 9, wherein, The C-shaped opening part of the buckle collar (31) extends outwardly at both ends with two parallel guide pieces (312), and the interval between the two guide pieces (312) is smaller than the outer diameter of the inner cannula segment (2).

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