Integrated air pipe quick connector
By setting up a jig assembly at the connection end of the metal pipe fittings and using the structure of the jig and sealing ring, the problem of inconvenient connection between the metal pipe and the pipe fittings is solved, and quick tool-free connection and efficient sealing are achieved.
Patent Information
- Application Number
- CN202423297892.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the prior art, there is inconvenience in the connection method between metal pipes and pipe fittings, including welding, threaded connection and clamping connection, all require tools, resulting in inconvenient connection and low efficiency.
A pipe fitting made of metal material is used, and a jig assembly is provided at the connecting end, including a jig and a sealing ring. Through the coordination of the jaws and the tapered part, the toolless connection between the pipe and the pipe fitting and the circumferential seal are achieved.
It realizes fast and reliable connection and sealing between pipes and fittings, avoids the use of tools, and improves the connection efficiency and sealing effect.
Smart Images
Figure CN223215960U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of trachea joints, in particular to an integrated trachea quick joint. Background Art
[0002] At present, when metal pipes and metal pipe fittings are butt-connected, the ends of the pipes and the connecting ends of the pipe fittings are mostly connected, fixed and circumferentially sealed by welding, threaded connection or crimping connection. The above-mentioned welding connection method requires the use of a welding machine to complete the welding, fixing and circumferential sealing of the ends of the pipes and the connecting ends of the pipe fittings, which has the disadvantage of inconvenient connection between the pipes and the pipe fittings. Similarly, the threaded connection method requires the provision of threads on the outer wall of the end of the pipe and the inner wall of the connecting end of the pipe fitting, which also has the disadvantage of inconvenient connection between the pipes and the pipe fittings. If the above-mentioned crimping connection method is used to connect the ends of the pipes and the connecting ends of the pipe fittings, a crimping tool is required, which also has the disadvantage of inconvenient connection between the pipes and the pipe fittings. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an integrated trachea quick connector, which has the advantages of convenient connection with metal pipes and high connection efficiency.
[0004] The utility model provides an integrated air pipe quick connector, comprising a pipe fitting made of metal material; a clamping pipe assembly is provided on at least one connecting end of the pipe fitting, and when the end of the pipe made of metal material passes through the clamping pipe assembly and is inserted into the connecting end of the pipe fitting, the clamping pipe assembly is used to clamp the pipe and perform a circumferential seal on the pipe and the pipe fitting.
[0005] By adopting the above structure, the utility model can clamp the pipe and circumferentially seal the pipe and the pipe fitting after the end of the pipe made of metal material passes through the pipe clamping assembly and is inserted into the connecting end of the pipe. That is, no tools are required for the connection of the pipe and the pipe fitting, thereby having the advantages of convenient connection with the metal pipe and high connection efficiency.
[0006] In one possible embodiment, a pipe clamping assembly is provided on each connecting end of the pipe fitting. By adopting this structure, each connecting end of the pipe fitting can be clamped and circumferentially sealed with the metal pipe through the pipe clamping assembly, thereby facilitating the connection between the pipe and the pipe fitting.
[0007] In one possible embodiment, the pipe clamping assembly includes a clamping sleeve and a sealing ring; a first annular step is provided on the inner wall of the connecting end of the pipe fitting, and the side wall of the first annular step forms an annular tapered portion, which gradually shrinks from the inside to the outside, and the sealing ring abuts against the first annular step, and the outer edge of the sealing ring is tightly sealed with the inner wall of the tapered portion, and the inner edge of the sealing ring is tightly sealed with the outer peripheral wall of the pipe; the inner end of the clamping sleeve is inserted into the connecting end of the pipe fitting and can move axially relative to the connecting end of the pipe fitting, and an anti-slip structure is provided between the connecting end of the clamping sleeve and the pipe fitting, and the inner end of the clamping sleeve forms a plurality of claws spaced apart in the circumferential direction of the clamping sleeve, and the inner ends of the plurality of claws abut against the outer end of the tapered portion. On the inner wall, several claws are used to hold the pipe passing through the ferrule; after adopting this pipe clamping assembly, when the end of the pipe is connected to the connecting end of the pipe fitting, the ferrule is first squeezed toward the side close to the pipe fitting. When the ferrule is squeezed and moves inward relative to the connecting end of the pipe fitting, the tapered portion gradually contracts from the inside to the outside, which is equivalent to the tapered portion gradually expanding from the outside to the inside, so that the inner end of each claw can expand outward along the radial direction of the ferrule. Then the end of the pipe can be passed through the ferrule and the sealing ring and inserted into the connecting end of the pipe fitting. After the pipe passes through the ferrule, several claws can hold the outer wall of the pipe tightly, and then the ferrule can be released. When the pipe is subjected to outward tension, Or when the pipe is pushed by the air pressure flowing through the pipe fitting, that is, when the pipe wants to leave the pipe fitting, the plurality of claws hold the outer wall of the pipe tightly, so that the pipe can drive the ferrule to move synchronously toward the side away from the pipe fitting, and because the tapered portion gradually contracts from the inside to the outside, the plurality of claws cooperate with the tapered portion to further hold the pipe in the process of the ferrule moving outward, which can effectively prevent the pipe from leaving the connecting end of the pipe fitting, thereby achieving a reliable connection between the pipe and the pipe fitting; in addition, since the outer edge of the sealing ring is tightly sealed with the inner wall of the tapered portion, the inner edge of the sealing ring is tightly sealed with the outer peripheral wall of the pipe, which can The sealing ring can reliably seal the gap between the pipe and the fitting; when the pipe needs to be separated from the fitting, the ferrule is first squeezed toward the side close to the pipe fitting. When the ferrule is squeezed and moves inward relative to the connecting end of the pipe fitting, the tapered portion gradually contracts from the inside to the outside, which is equivalent to the tapered portion gradually expanding from the outside to the inside, so that the inner end of the clamping claw has space to expand outward along the radial direction of the ferrule, and then the pipe can be pulled toward the side away from the fitting. Because the inner end of the clamping claw has space to expand outward along the radial direction of the ferrule, the several clamping claws can release the clamping state on the pipe, that is, the pipe can be pulled out of the ferrule, thereby realizing the separation of the pipe and the fitting.
[0008] In one possible embodiment, an annular chamfered surface is provided on the inner wall of the connecting end of the pipe fitting, the inner end of the annular chamfered surface is connected to the outer end of the tapered portion, and the annular chamfered surface is used to cooperate and guide with the inner end portions of several claws so that the several claws can be inserted into the inner side of the tapered portion; by adopting this structure, when the inner end portion of the ferrule is inserted into the connecting end of the pipe fitting, under the action of the annular chamfered surface, the annular chamfered surface can cooperate and guide with the inner end portions of several claws so that the several claws can be inserted into the inner side of the tapered portion.
[0009] In one possible embodiment, a protruding and serrated abutment portion is provided on the outer wall of the inner end portion of each jaw, and the abutment portion abuts against the inner wall at the outer end of the tapered portion; by adopting this structure, under the action of the abutment portion, the inner end portion of each jaw can reliably abut against the inner wall at the outer end of the tapered portion. In addition, since each abutment portion is a protruding serrated structure, the friction between the inner end portion of the jaw and the tapered portion can be reduced when the sleeve moves relative to the connecting end of the pipe.
[0010] In one possible embodiment, a protrusion is provided on the outer side wall of each clamping claw, and an annular neck is provided at the outer end of the connecting end of the pipe fitting, and the annular neck is used to abut against the protrusion on the clamping claw to prevent the ferrule from axially separating from the connecting end of the pipe fitting; by adopting this structure, the ferrule can be effectively prevented from separating from the connecting end of the pipe fitting. In addition, after the inner end of the ferrule is inserted into the connecting end of the pipe fitting, the outer end of the connecting end of the pipe fitting is necked by a necking device to form the above-mentioned annular neck.
[0011] In one possible embodiment, an annular ridge is provided on the outer wall of the outer end portion of the ferrule, and the annular ridge is used to abut against the fingers so that the fingers can squeeze the ferrule toward one side of the pipe. After adopting this structure, when squeezing the ferrule toward one side of the pipe, the fingers can abut against the annular ridge, thereby facilitating the fingers to squeeze the ferrule toward one side of the pipe.
[0012] In a possible embodiment, a ring-shaped open groove is provided in the middle of the inner end surface of the sealing ring, the sealing ring located on the inner side of the open groove gradually shrinks inwardly along the axial direction of the sealing ring and forms an annular shrinkage portion, the inner edge of the annular shrinkage portion is tightly sealed with the outer wall of the pipe, and the sealing ring located on the outer side of the open groove gradually expands outwardly along the axial direction of the sealing ring and forms an annular expansion portion, the outer edge of the annular expansion portion is tightly sealed with the inner wall of the tapered portion; after adopting this structure, when the end of the pipe is connected to the connecting end of the pipe fitting through the pipe clamping assembly, when there is fluid pressure in the pipe fitting and the pipe, the fluid pressure can act on the inner wall of the open groove, because the sealing ring located on the inner side of the open groove gradually shrinks inwardly along the axial direction of the sealing ring and forms an annular shrinkage portion. part, so that the fluid pressure can act on the annular contraction part, and the annular contraction part is further in close contact with the outer wall of the pipe, and the greater the fluid pressure, the better the sealing effect of the annular contraction part and the pipe is, that is, the sealing effect of the sealing ring and the pipe is further improved; similarly, since the sealing ring located outside the open groove gradually expands outward along the axial direction of the sealing ring and forms an annular expansion part, the fluid pressure can act on the annular expansion part, and the annular expansion part is further in close contact with the inner wall of the tapered part, and the greater the fluid pressure, the better the sealing effect of the annular expansion part and the tapered part is, that is, the sealing effect of the sealing ring and the tapered part is further improved, that is, the sealing effect of the sealing ring on the gap between the pipe and the pipe fitting is improved.
[0013] In one possible embodiment, a second annular step is provided on the inner wall of the connecting end of the pipe fitting; when the end of the pipe passes through the clamping tube assembly and is inserted into the connecting end of the pipe, the second annular step is used to abut against the end of the pipe; by adopting this structure, when the end of the pipe passes through the clamping tube assembly and is inserted into the connecting end of the pipe, the second annular step can abut against the end of the pipe, thereby limiting the connecting end of the pipe and the pipe fitting, and reminding the installer that the connecting end of the pipe fitting and the pipe has been inserted into place. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a partial cross-sectional structural diagram after the pipe is connected with the utility model;
[0015] Figure 2 Schematic diagram of the cross-sectional structure of the ferrule;
[0016] Figure 3 Schematic diagram of the cross-sectional structure of the sealing ring. DETAILED DESCRIPTION
[0017] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.
[0018] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.
[0019] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0020] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] See also Figure 1-3 As shown, an embodiment of the present application discloses an integrated air pipe quick connector, including a pipe fitting 1 made of metal material; a clamping pipe assembly 2 is provided on at least one connecting end of the pipe fitting 1. When the end of a pipe 3 made of metal material passes through the clamping pipe assembly 2 and is inserted into the connecting end of the pipe fitting 1, the clamping pipe assembly 2 is used to clamp the pipe 3 and perform circumferential sealing on the pipe 3 and the pipe fitting 1.
[0022] A clamping assembly 2 is provided on each connecting end of the pipe fitting 1. By adopting this structure, each connecting end of the pipe fitting can be clamped and circumferentially sealed with the metal pipe through the clamping assembly, thereby facilitating the connection between the pipe and the pipe fitting.
[0023] The pipe clamping assembly 2 includes a ferrule 21 and a sealing ring 22; a first annular step 11 is provided on the inner wall of the connecting end of the pipe fitting 1, and the side wall of the first annular step 11 forms an annular tapered portion 12, which gradually shrinks from the inside to the outside, and the sealing ring 22 abuts against the first annular step 11, and the outer edge of the sealing ring 22 is tightly sealed with the inner wall of the tapered portion 12, and the inner edge of the sealing ring 22 is tightly sealed with the outer peripheral wall of the pipe 3; the inner end of the ferrule 21 is inserted into the connecting end of the pipe fitting 1 and can move axially relative to the connecting end of the pipe fitting 1, and an anti-slip structure is provided between the ferrule 21 and the connecting end of the pipe fitting 1, and the inner end of the ferrule 21 forms a plurality of claws 211 distributed at intervals in the circumferential direction of the ferrule 21. If The inner ends of the plurality of claws 211 rest against the inner wall at the outer end of the tapered portion 12, and the plurality of claws 211 are used to tightly hold the pipe 3 passed through the ferrule 21. After adopting this pipe clamping assembly, when the end of the pipe is connected to the connecting end of the pipe fitting, the ferrule is first squeezed toward the side close to the pipe fitting. When the ferrule is squeezed and moves inward relative to the connecting end of the pipe fitting, the tapered portion gradually contracts from the inside to the outside, which is equivalent to the tapered portion gradually expanding from the outside to the inside. As a result, the inner end of each claw can expand outward along the radial direction of the ferrule, and then the end of the pipe can be passed through the ferrule and the sealing ring and inserted into the connecting end of the pipe fitting. After the pipe passes through the ferrule, the plurality of claws can be tightly clamped on the outer wall of the pipe and then released. The ferrule can be used; when the pipe is subjected to outward pulling force, or when the pipe is subjected to the thrust of the air pressure flowing through the pipe fitting, that is, when the pipe wants to detach from the pipe fitting, the plurality of claws hold the outer wall of the pipe tightly, so that the pipe can drive the ferrule to move synchronously toward the side away from the pipe fitting, and because the tapered portion gradually contracts from the inside to the outside, the plurality of claws can further hold the pipe in the process of the ferrule moving outward under the cooperation of the plurality of claws and the tapered portion, that is, it can effectively prevent the pipe from detaching from the connecting end of the pipe fitting, thereby realizing a reliable connection between the pipe and the pipe fitting; in addition, since the outer edge of the sealing ring is tightly sealed with the inner wall of the tapered portion, the inner edge of the sealing ring is tightly sealed with the outer peripheral wall of the pipe The seal is tight, so that the sealing ring can reliably seal the gap between the pipe and the fitting; when the pipe needs to be separated from the fitting, the ferrule is first squeezed toward the side close to the pipe fitting. When the ferrule is squeezed and moves inward relative to the connecting end of the pipe fitting, the tapered portion gradually contracts from the inside to the outside, which is equivalent to the tapered portion gradually expanding from the outside to the inside, so that the inner end of the clamping claw has space to expand outward along the radial direction of the ferrule, and then the pipe can be pulled toward the side away from the fitting. Because the inner end of the clamping claw has space to expand outward along the radial direction of the ferrule, the several clamping claws can release the clamping state of the pipe, that is, the pipe can be pulled out of the ferrule, thereby realizing the separation of the pipe and the fitting.
[0024] An annular chamfered surface 13 is provided on the inner wall of the connecting end of the pipe fitting 1, and the inner end of the annular chamfered surface 13 is connected with the outer end of the tapered portion 12. The annular chamfered surface 13 is used to cooperate with the inner end portions of several claws 211 to guide so that the several claws 211 can be inserted into the inner side of the tapered portion 12; by adopting this structure, when the inner end portion of the ferrule is inserted into the connecting end of the pipe fitting, under the action of the annular chamfered surface, the annular chamfered surface can cooperate with the inner end portions of several claws to guide so that the several claws can be inserted into the inner side of the tapered portion.
[0025] A protruding and serrated abutment portion 212 is provided on the outer wall of the inner end portion of each clamping jaw 211, and the abutment portion 212 abuts against the inner wall at the outer end of the tapered portion 12; by adopting this structure, under the action of the abutment portion, the inner end portion of each clamping jaw can reliably abut against the inner wall at the outer end of the tapered portion. In addition, since each abutment portion is a protruding serrated structure, the friction between the inner end portion of the clamping jaw and the tapered portion can be reduced when the sleeve moves relative to the connecting end of the pipe.
[0026] A protrusion 213 is provided on the outer side wall of each clamping claw 211, and an annular necking 14 is provided at the outer end of the connecting end of the pipe fitting 1. The annular necking 14 is used to abut against the protrusion 213 on the clamping claw 211 to prevent the ferrule 21 from axially separating from the connecting end of the pipe fitting 1; by adopting this structure, the ferrule can be effectively prevented from separating from the connecting end of the pipe fitting. In addition, after the inner end of the ferrule is inserted into the connecting end of the pipe fitting, the outer end of the connecting end of the pipe fitting is necked by a necking device to form the above-mentioned annular necking.
[0027] An annular convex edge 214 is provided on the outer wall of the outer end portion of the ferrule 21, and the annular convex edge 214 is used to abut against the fingers so that the fingers can squeeze the ferrule 21 toward the side of the pipe 1; after adopting this structure, when squeezing the ferrule toward one side of the pipe, the fingers can abut against the annular convex edge, thereby facilitating the fingers to squeeze the ferrule toward the side of the pipe.
[0028] An annular opening groove 221 is provided in the middle of the inner end surface of the sealing ring 22. The sealing ring 22 located inside the opening groove 221 gradually shrinks inwardly along the axial direction of the sealing ring 22 and forms an annular shrinkage portion 222. The inner edge of the annular shrinkage portion 222 is tightly sealed with the outer wall of the pipe 3. The sealing ring 22 located outside the opening groove 221 gradually expands outwardly along the axial direction of the sealing ring 22 and forms an annular expansion portion 223. The outer edge of the annular expansion portion 223 is tightly sealed with the inner wall of the tapered portion 12. After adopting this structure, when the end of the pipe is connected to the connecting end of the pipe fitting through the pipe clamp assembly, when there is fluid pressure in the pipe fitting and the pipe, the fluid pressure can act on the inner wall of the opening groove. Since the sealing ring located inside the opening groove gradually shrinks in the axial direction of the sealing ring, the sealing ring 22 gradually expands outwardly along the axial direction of the sealing ring. The outer edge of the annular expansion portion 223 is tightly sealed with the inner wall of the tapered portion 12. It shrinks inward and forms an annular contraction portion, so that the fluid pressure can act on the annular contraction portion, and the annular contraction portion is further tightly attached to the outer wall of the pipe, and the greater the fluid pressure, the better the sealing effect of the annular contraction portion and the pipe, that is, the sealing effect of the sealing ring and the pipe is further improved; similarly, since the sealing ring located outside the open groove gradually expands outward along the axial direction of the sealing ring and forms an annular expansion portion, the fluid pressure can act on the annular expansion portion, and the annular expansion portion is further tightly attached to the inner wall of the tapered portion, and the greater the fluid pressure, the better the sealing effect of the annular expansion portion and the tapered portion is, that is, the sealing effect of the sealing ring and the tapered portion is further improved, that is, the sealing effect of the sealing ring on the gap between the pipe and the pipe fitting is improved.
[0029] A second annular step 15 is provided on the inner wall of the connecting end of the pipe fitting 1; when the end of the pipe 3 passes through the pipe clamping assembly 2 and is inserted into the connecting end of the pipe 3, the second annular step 15 is used to abut against the end of the pipe 3; by adopting this structure, when the end of the pipe passes through the pipe clamping assembly and is inserted into the connecting end of the pipe, the second annular step can abut against the end of the pipe, thereby limiting the connection end of the pipe and the pipe fitting, and reminding the installer that the connection end of the pipe fitting and the pipe has been inserted into place.
[0030] In this embodiment, the pipe fittings and ferrules are both made of steel, and the pipe is made of copper.
[0031] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. An integrated trachea quick connector, comprising a pipe (1) made of a metal material; characterized in that: A pipe clamping assembly (2) is provided on at least one connecting end of the pipe fitting (1). When the end of a pipe (3) made of a metal material passes through the pipe clamping assembly (2) and is inserted into the connecting end of the pipe fitting (1), the pipe clamping assembly (2) is used to clamp the pipe (3) and perform circumferential sealing on the pipe (3) and the pipe fitting (1).
2. The integrated trachea quick connector according to claim 1, characterized in that: A pipe clamping assembly (2) is provided on each connecting end of the pipe fitting (1).
3. The integrated trachea quick connector according to claim 1 or 2, characterized in that: The pipe clamping assembly (2) includes a clamping sleeve (21) and a sealing ring (22); a first annular step (11) is provided on the inner wall of the connecting end of the pipe (1); the side wall of the first annular step (11) forms an annular tapered portion (12); the tapered portion (12) gradually shrinks from the inside to the outside; the sealing ring (22) abuts against the first annular step (11); the outer edge of the sealing ring (22) is tightly sealed with the inner wall of the tapered portion (12); and the inner edge of the sealing ring (22) is tightly sealed with the outer peripheral wall of the pipe (3); The inner end of the ferrule (21) is inserted into the connecting end of the pipe fitting (1) and can move axially relative to the connecting end of the pipe fitting (1). An anti-slip structure is provided between the ferrule (21) and the connecting end of the pipe fitting (1). The inner end of the ferrule (21) forms a plurality of claws (211) spaced apart in the circumferential direction of the ferrule (21). The inner ends of the plurality of claws (211) abut against the inner wall at the outer end of the tapered portion (12). The plurality of claws (211) are used to clamp the pipe (3) passed through the ferrule (21).
4. The integrated trachea quick connector according to claim 3, characterized in that: An annular chamfered surface (13) is provided on the inner wall of the connecting end of the pipe fitting (1), the inner end of the annular chamfered surface (13) is connected to the outer end of the tapered portion (12), and the annular chamfered surface (13) is used to cooperate with the inner end of a plurality of claws (211) to guide so that the plurality of claws (211) can be inserted into the inner side of the tapered portion (12).
5. The integrated trachea quick connector according to claim 3, characterized in that: An outwardly protruding and sawtooth-shaped abutting portion (212) is provided on the outer wall of the inner end portion of each of the claws (211), and the abutting portion (212) abuts against the inner wall at the outer end of the conical portion (12).
6. The integrated trachea quick connector according to claim 3, characterized in that: A protrusion (213) is provided on the outer side wall of each of the clamping claws (211), and an annular constriction (14) is provided at the outer end of the connecting end of the pipe fitting (1). The annular constriction (14) is used to abut against the protrusion (213) on the clamping claw (211) to prevent the ferrule (21) from axially separating from the connecting end of the pipe fitting (1).
7. The integrated trachea quick connector according to claim 3, characterized in that: An annular convex edge (214) is provided on the outer wall of the outer end portion of the ferrule (21), and the annular convex edge (214) is used to abut against a finger so that the finger can press the ferrule (21) toward one side of the pipe (1).
8. The integrated trachea quick connector according to claim 3, characterized in that: An annular opening groove (221) is provided in the middle of the inner end surface of the sealing ring (22); the sealing ring (22) located inside the opening groove (221) gradually contracts inwardly along the axial direction of the sealing ring (22) to form an annular contraction portion (222); the inner edge of the annular contraction portion (222) is tightly sealed with the outer wall of the pipe (3); the sealing ring (22) located outside the opening groove (221) gradually expands outwardly along the axial direction of the sealing ring (22) to form an annular expansion portion (223); the outer edge of the annular expansion portion (223) is tightly sealed with the inner wall of the tapered portion (12).
9. The integrated trachea quick connector according to claim 1 or 2, characterized in that: A second annular step (15) is provided on the inner wall of the connecting end of the pipe fitting (1); when the end of the pipe (3) passes through the pipe clamping assembly (2) and is inserted into the connecting end of the pipe (3), the second annular step (15) is used to abut against the end of the pipe (3).