Metal pipeline quick-insertion connecting structure

Abstract

The utility model discloses a metal pipeline quick-plug connecting structure, the connecting structure is composed of a quick pipeline connector and a ring groove arranged on the surface of a metal pipeline, the quick pipeline connector is composed of a shell assembly, a sealing assembly, a pipe locking piece and an auxiliary piece, and at least one ring groove is arranged on the surface of the metal pipeline. The pipe locking piece is provided with a plurality of clamping jaws distributed in the circumferential direction of the inner edge, the end of each clamping jaw is inserted into an annular groove in the surface of the metal pipeline, and the metal pipeline is matched in a quick insertion port of the quick pipeline connector in a non-detachable connection mode or in a detachable connection mode through an auxiliary piece. The connecting structure solves the problem that the pipe locking clamping jaw cannot clamp and lock the surface of the pipeline due to the fact that the material of the pipeline is too hard, the pipeline can be installed on site in a bare-handed mode, the pipeline can be easily pulled out from the quick pipeline connector in a bare-handed mode to be disassembled, quick assembly and disassembly between the metal pipeline and the quick pipeline connector are achieved, and the practicability is high. And the pipeline construction is simpler, more convenient, safer and more environment-friendly, and the construction cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a metal pipeline quick-plug connection structure. Background Art

[0002] Metal pipes are widely used, especially stainless steel pipes. Taking stainless steel pipes as an example, the pipe connection process is currently mainly welding connection and compression connection. Among them, welding connection requires professional welding equipment to carry out on-site welding construction to weld pipes and pipes or pipes and pipe fittings; compression connection uses stainless steel pipe fittings with sealing rings to naturally socket stainless steel pipes, and then uses professional hydraulic equipment to perform pipe compression operation, so that the connection between pipe fittings and pipes is flattened and deformed, thereby forming an obstacle point to prevent the pipe from falling off. Whether it is welding connection or compression connection, on-site construction requires professional equipment and professionals, and needs to rely on electricity. In addition, the connected pipeline is disposable, and there is no opportunity for flexible angle adjustment and flexible disassembly and assembly. It is inconvenient to operate in narrow space construction, high-altitude construction and later pipeline maintenance, which greatly affects on-site construction and pipeline application. Utility Model Content

[0003] In view of the above-mentioned technical deficiencies, the utility model provides a solution to the problem that the locking claws cannot press and lock the pipe on the pipe surface due to the pipe material being too hard. The pipe can be plugged in by hand on site without the need for professional equipment or electricity. The pipe can also be easily pulled out of the quick pipe connector by hand during disassembly. Rapid assembly and disassembly between the metal pipe and the quick pipe connector can be achieved, making pipe construction simpler, safer, and a quick-plug connection structure with lower construction costs.

[0004] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0005] The utility model discloses a metal pipe quick-insert connection structure, which is composed of a quick pipe connector and an annular groove provided on the surface of the metal pipe. The quick pipe connector is composed of a shell component, a sealing component, a pipe lock component and an auxiliary component. At least one annular groove is provided on the surface of the metal pipe. The pipe lock component has a plurality of claws distributed along the inner circumference. The ends of the claws are inserted into an annular groove on the surface of the metal pipe. The metal pipe is matched in a quick-insert port of the quick pipe connector in a non-detachable connection mode or in a detachable connection mode using an auxiliary component. The quick pipe connector is provided with one or more sealing components.

[0006] Further, the minimum distance between the end of the jaw inserted into the annular groove and the stop step in the housing assembly that restricts further insertion of the metal pipe is L1. When the metal pipe is inserted into the quick-insert port and abuts against the stop step, the maximum distance between the entire sealing assembly farthest from the port of the metal pipe and the port of the metal pipe in the axial direction of the metal pipe is L2. The value range of the distance C from the annular groove to the port of the metal pipe is between L2 and L1.

[0007] Further, the cross-sectional shape of the annular groove is "V"-shaped. The inclined surface of the annular groove near the port where the metal pipe is inserted into the quick-insert port has an inclination angle of ∠1, and the inclined surface of the annular groove on the side away from the port of the metal pipe has an inclination angle of ∠2. The included angle formed by the jaw inserted into the annular groove and the plane of the cross-section parallel to the axial direction of the metal pipe is ∠3. The inclination angle of the inclined surface of the annular groove near the port of the metal pipe satisfies ∠1 > 45° and ∠1 ≥ 90° - ∠3, and the inclination angle of the inclined surface of the annular groove on the side away from the port of the metal pipe satisfies ∠2 ≤ ∠3.

[0008] Further, the cross-sectional shape of the annular groove is rectangular, and the end face of the jaw inserted into the annular groove abuts against one side edge of the notch of the annular groove.

[0009] Further, the metal pipe is detachably fitted in the quick-insert port. The auxiliary member is fitted in the housing assembly and translates in the housing assembly by being pushed as a whole by an external force or driven to rotate as a whole by an external force. The auxiliary member translates in the housing assembly and pushes the jaw away from the annular groove to realize the detachment of the metal pipe from the jaw.

[0010] Further, an elastic ring is provided in the space of the housing assembly near the locking pipe fitting side, and the elastic ring abuts against the surface of the jaw on the side other than the pipe insertion direction.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1) When the hardness of the metal pipe material is much lower than the hardness of the jaw material, no matter how smooth the surface of the metal pipe is, the jaw can directly embed into the surface of the metal pipe to form a stop point. At this time, the jaw can directly and effectively clamp and lock the pipe. However, when the hardness of the metal pipe material is greater than or close to the hardness of the jaw material, the jaw cannot quickly and effectively embed into the pipe surface, and the jaw cannot effectively clamp and lock the metal pipe. By adopting the connection structure disclosed in the present utility model, the problem that the locking pipe jaw cannot clamp and lock the surface of the metal pipe due to the too hard material of the metal pipe can be solved.

[0013] 2) When the jaws grip the annular groove of the metal pipe, the tips of the jaws can rotate flexibly within the annular groove of the pipe, and at the same time, the jaw ring can also rotate flexibly inside the quick pipe connector. Thus, after the quick pipe connector is connected to the pipe, each quick connection can rotate flexibly by 360 degrees. Therefore, during pipe installation, the pipe can be adjusted flexibly according to the actual on-site needs, which is convenient for construction and helps reduce rework waste.

[0014] 3) The quick pipe connector is used to connect metal pipes with annular grooves. Without the aid of any special tools, it can achieve quick installation by hand, making pipe construction simpler, safer, more environmentally friendly, and with lower construction costs.

[0015] 4) Compared with the previous crimped pipe connection structure for metal pipes, this connection structure can achieve the connection between the pipe connection structure and the metal pipe without deforming the connection between the pipe material and the pipe fitting towards the inner cavity. This connection structure is beneficial to maintaining the stability and repeatability of the metal pipe's own structure, ensuring that the medium transmission path at the connection is always the same.

[0016] 5) Since the quick insertion connection structures for pipes with the same pipe diameter can be exactly the same, it is possible to achieve standardized production of the annular groove structure at the pipe end and the quick pipe connector, and modular quick insertion connection of pipes can be realized.

[0017] 6) In the pipeline of the detachable quick pipe connector, each metal pipe and each quick pipe connector can be easily disassembled and reused, saving more materials in construction and being more environmentally friendly and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the components of this connection structure.

[0019] Figure 2 It is a schematic diagram of the distance from the annular groove to the end of the metal pipe.

[0020] Figure 3 It is a schematic diagram of the structure when the jaws are fitted in the annular groove with a "V" - shaped cross - section on the metal pipe.

[0021] Figure 4 It is a schematic diagram of the structure when the jaws are fitted in the "V" - shaped annular groove with the inclined angles of the two sides being ∠1.

[0022] Figure 5 It is a schematic diagram of the structure of the first metal pipe with a "V" - shaped annular groove.

[0023] Figure 6 It is a schematic diagram of the structure when the jaws are fitted in the "V" - shaped annular groove with the inclined angles of the two sides being ∠1 and ∠2 respectively.

[0024] Figure 7Structural schematic of the second metal pipe with a "V"-shaped annular groove Figure Two 。

[0025] Figure 8 Structural schematic when the clamping jaw is fitted into the annular groove with a rectangular cross-section on the metal pipe

[0026] Figure 9 Structural schematic of the metal pipe detachably fitted into its quick-insertion port

[0027] Figure 10 Structural schematic of the metal pipe non-detachably fitted into its quick-insertion port

[0028] Figure 11 Schematic diagram of the depth of the annular groove

[0029] Figure 12 Structural schematic of the locking pipe fitting with the clamping jaw not inserted into the annular groove

[0030] Figure 13 Structural schematic when the elastic ring abuts against the end face of the clamping jaw

[0031] In the figure, 1. metal pipe; 2. annular groove; 3. housing assembly; 4. sealing assembly; 5. locking pipe fitting; 6. auxiliary part; 7. clamping jaw; 8. quick-insertion port; 9. stop step; 10. tip; 11. elastic ring Specific embodiments

[0032] The present utility model discloses a quick-insertion connection structure for a metal pipe. As shown in Figure 1 、 Figure 9 and Figure 10 , the connection structure is composed of a quick pipe connector and an annular groove 2 provided on the surface of the metal pipe 1. The quick pipe connector is composed of a housing assembly 3, a sealing assembly 4, a locking pipe fitting 5 and an auxiliary part 6. At least one annular groove 2 is provided on the surface of the metal pipe 1. The locking pipe fitting 5 is provided with a plurality of clamping jaws 7 circumferentially distributed along the inner edge. The end of the clamping jaw 7 is inserted into an annular groove 2 on the surface of the metal pipe 1. The metal pipe 1 is non-detachably connected or detachably connected by using the auxiliary part 6 and fitted into the quick-insertion port 8 of the quick pipe connector. The quick pipe connector is provided with one or more sealing assemblies 4

[0033] It should be noted that the annular groove 2 in the connection structure needs to be formed by machining on the surface of the metal pipe 1. The number of annular grooves 2 provided in a specific area near the port of the metal pipe 1 can be selected to be one or more according to actual usage considerations. Moreover, the specific area where the annular groove 2 is provided can be determined according to the distance from the position where the quick pipe connector is connected to it to the port of the metal pipe 1. The machining of the annular groove 2 of the metal pipe 1 can be pre-set by machining in the factory or can be machined temporarily at the construction site. Generally, the annular groove 2 is machined by a machining tool on equipment such as a lathe or a sawing machine, or the annular groove 2 can also be formed by manual or electric tools such as hydraulic pliers shaping and rotary extrusion;

[0034] Secondly, the metal pipe 1 may be affected by vibrations, water hammer impacts, ground pressure impacts, and other adverse environments for a long time. By strengthening the support strength at the root of the jaws 7 on the jaw 7 ring, by optimizing the inclination angle of the jaws 7 and reducing the inner diameter of the pipe locked by the tips of the jaws 7, the pre-pressure on the pipe surface by the tips of the jaws 7 is enhanced, so as to prevent the problem of the jaws 7 loosening during the long-term pipe locking process; when the material hardness of the metal pipe 1 is lower than the material hardness of the jaws 7, no matter how smooth the surface of the metal pipe 1 is, the jaws 7 can directly embed into the surface of the metal pipe 1 to form a stop point. At this time, the jaws 7 can directly and effectively clamp and lock the pipe; when the pipe material hardness is greater than or equal to the material hardness of the jaws 7, the jaws 7 cannot effectively embed into the pipe surface, so the pipe cannot be effectively clamped and locked. Therefore, by adopting this connection structure, the problem that the locking pipe jaws 7 cannot clamp and lock the smooth pipe surface due to the too hard pipe material can be solved; moreover, the annular groove 2 on the surface of the metal pipe 1 can cooperate with the currently common crimped pipe connection structure in the industry, that is, a hydraulic tool is used to change the shape of the pipe connection component to achieve the matching means between the pipe connection component and the annular groove 2 on the surface of the metal pipe 1. This connection structure can also be well compatible, enabling this connection structure to have the ability to adapt to different types of metal pipe 1 connection methods; compared with the crimped pipe connection structure, this connection structure does not require the inner cavity of the pipe material or pipe fitting to deform to realize the connection between the pipe connection structure and the metal pipe 1. The formation of the metal pipe 1 connection structure has less impact on the self-characteristics of the metal pipe 1 for medium transmission, and is beneficial to maintaining the stability of the metal pipe 1's own structure and the stability of its transmitted medium.

[0035] In addition, since the lock pipe fitting 5 can rotate flexibly inside the quick pipe connector, when the claw 7 catches the annular groove 2 of the pipe, the tip of the claw 7 can also rotate flexibly within the annular groove 2 of the metal pipe 1. Therefore, after the quick pipe connector is connected to the pipe, each connection can rotate 360 degrees. Thus, when installing the metal pipe 1, the installation angle of the metal pipe 1 can be adjusted flexibly according to the actual on-site needs; the quick pipe connector is connected to the metal pipe 1 provided with the annular groove 2, and it can be quickly installed by hand without the aid of any special tools; the pipe can be inserted by hand on-site without professional equipment and electricity, and the quick connection between the metal pipe 1 and the quick pipe connector can be realized, making the construction of the metal pipe 1 simpler, safer, and with lower construction costs; the quick pipe connector is connected to the pipe provided with the annular groove 2. Move the unlocking component of the quick pipe connector between the claw 7 and the pipe surface to separate the claw 7 from the pipe surface to complete unlocking. At this time, the pipe can be easily pulled out by hand from the quick pipe connector; since the quick insertion connection structure of the same batch of pipes can be made exactly the same, the standardized production of pipes and quick pipe connectors can be realized, and the modular quick insertion connection of pipes can be realized; on the detachable quick pipe connector pipeline, each pipe and each quick pipe connector can be easily disassembled and reused, saving more materials in construction and being more environmentally friendly.

[0036] As a further preference of the above embodiment, as Figure 2 shown, the minimum distance between the end of the claw 7 inserted into the annular groove 2 and the stop step 9 in the housing assembly 3 that restricts the further insertion of the metal pipe 1 is L1. When the metal pipe 1 is inserted into the quick insertion port 8 and abuts against the stop step 9, the maximum distance between the entire sealing assembly 4 farthest from the port of the metal pipe 1 and the port of the metal pipe 1 in the axial direction of the metal pipe 1 is L2. The value range of the distance C from the annular groove 2 to the port of the metal pipe 1 is between L2 and L1.

[0037] Among them, the annular groove 2 can be processed and set in one or multiple ways; as long as the width of the specific area where the annular groove 2 can be arranged allows at the relevant position, it should be less than the distance from the tip of the claw 7 of the quick insertion pipe fitting to the center section of the sealing ring, that is, it is set within the length value range composed of L2 and L1. As many annular grooves 2 as possible can be set to increase the safety and reliability of the pipe locking by the claw 7. The plane where the annular groove 2 is located should be perpendicular to the pipe to facilitate the claw 7 to fall into the groove at the same time and reversely catch the annular groove 2 to prevent reverse displacement between the pipe and the quick insertion pipe fitting when the pipe is under pressure.

[0038] As one of the embodiments of the present invention, as Figures 3 - 5As shown in the figure, the cross-sectional shape of the annular groove 2 is "V"-shaped, the inclined surface of the annular groove 2 close to the port where the metal pipe 1 is inserted into the quick-insert port 8 has an inclination angle of ∠1, the inclination angle of the inclined surface in the annular groove 2 away from the port side of the metal pipe 1 is ∠2, the angle formed by the claw 7 inserted into the annular groove 2 and the plane parallel to the axial cross-section of the metal pipe 1 is ∠3, the inclination angle of the inclined surface in the annular groove 2 close to the port side of the metal pipe 1 is ∠1>45° and ∠1≥90°-∠3, and the inclination angle of the inclined surface in the annular groove 2 away from the port side of the metal pipe 1 is ∠2≤∠3.

[0039] Among them, when the end of the claw 7 is engaged in the annular groove 2, the end face of the claw 7 will abut against the inclined surface on one side of the anti-slipping claw 7, and the inclined surface must have a large slope and at least 45 degrees, and it is also larger than the angle formed by the claw 7 and the vertical line perpendicular to the metal pipe 1, that is, the above-mentioned ∠3. The use of an inclined surface with an inclination angle that meets the ∠1 condition is conducive to forming a stop point with the claw 7, so that the claw 7 can clamp and fix the metal pipe 1, and it is not easy for the claw 7 to detach from the annular groove 2 under the action of external force, resulting in the inability to lock the pipe. The inclined surface with an inclination angle of ∠2 in the annular groove 2 is mainly for avoiding the end of the claw in an inclined state to avoid the inclination angle of the inclined surface being too large to interfere with the surface of the claw end and affect its locking effect.

[0040] In addition, the annular groove 2 of the "V"-shaped cross section can be formed on the surface of the metal pipe 1 by using simple on-site cutting equipment or extrusion molding equipment. Figure 5 It is a "V" type ring groove structure when ∠1=∠2; Figure 7 When ∠1>∠2, the "V" type ring groove structure is Figure 5 A variable structure of the "V"-shaped ring groove in the middle, the "V"-shaped ring groove is a ring groove 2 formed by one-time pressing, cutting or grinding using hydraulic equipment, and the two V"-shaped ring grooves achieve the same effect.

[0041] As one of the embodiments of the present utility model, Figure 8 As shown, the cross-sectional shape of the annular groove 2 is rectangular, and the end surface of the end of the claw 7 inserted into the annular groove 2 abuts against a notch edge line of the annular groove 2 .

[0042] Among them, the claw 7 of the above-mentioned structure has its end formed with two stop points in the annular groove 2. When the metal pipe 1 is subjected to water pressure and moves away from the quick-connect port, the end of the claw 7 can be used to support the metal pipe 1, so that the metal pipe 1 is limited by the claw 7, so that the claw 7 will not be separated from the annular groove 2 and the pipe cannot be locked. In addition, the annular groove 2 with a rectangular cross-section needs to be pre-processed by processing equipment. Compared with the annular groove 2 with a triangular cross-section, the annular groove 2 with a rectangular cross-section has a better effect of locking the pipe by the claw 7 of the quick-connect pipe fitting.

[0043] As one of the embodiments of the present utility model, as shown in Figure 9 , the metal pipe 1 is detachably fitted in the quick-insert port 8. The auxiliary member 6 is fitted in the housing assembly 3 and translates in the housing assembly 3 in a manner of being pushed as a whole by an external force or driven to rotate as a whole by an external force. The auxiliary member 6 translates in the housing assembly 3 and pushes the claw 7 away from the annular groove 2 to disengage the metal pipe 1 from the claw 7.

[0044] Among them, the auxiliary member 6 is a component for releasing the locking of the metal pipe 1 by the claw 7. When pushing the auxiliary member 6 to translate in the housing assembly 3, the end of the auxiliary member 6 can be used to press open the claw 7, so that all the claws 7 on the lock pipe member 5 open outwards, thereby releasing the locking of the metal pipe 1, and then the metal pipe 1 can be pulled out from the quick-insert port 8.

[0045] As a further preference of the above embodiment, as shown in the combination of Figure 9 and Figure 12 , the thickness of the claw 7 is R, the outer diameter value of the metal pipe 1 is D1, the inner diameter value of the annular groove 2 is D2, and the depth value H of the annular groove 2 is H = (D1 - D2) / 2 and R / 2 < H < R.

[0046] Among them, the depth value H of the annular groove 2 is less than the thickness of the wall of the metal pipe 1, which is beneficial to maintaining the stability of the structure of the metal pipe 1 itself. When the claw 7 is inserted into the annular groove 2, the surface of the metal pipe 1 will not be damaged. Moreover, the design that the depth value of the annular groove 2 is greater than half of the thickness value of the claw 7 and less than the thickness of the claw 7 is beneficial to the formation of the stop point between the annular groove 2 and the end of the claw 7; based on the detachable connection structure of the metal pipe 1, the above-mentioned annular groove depth design is convenient for the claw 7 to bounce open when disassembling the metal pipe 1. Even if the depth of the annular groove 2 is relatively deep, the auxiliary member 6 can still push open the claw 7 of the lock pipe to realize pipe disassembly; based on the non-detachable connection structure of the metal pipe 1, a deeper depth of the annular groove 2 is more helpful for the stability of the connection between the metal pipe 1 and the quick pipe connector.

[0047] As a further preference of the above embodiment, as shown in the combination of Figure 11 and Figure 12 , for the claw 7 not inserted into the annular groove 2, the inner upper tip 10 has an inner diameter value D3 in the lock pipe member 5, and the inner diameter value D3 of the tip 10 is D3 < D2.

[0048] Among them, for the claw 7 that is not inserted into the annular groove 2, the tip 10 on its inner edge is designed such that when the inner diameter value D3 of the pipe locking member 5 is smaller than the inner diameter value D2 of the annular groove 2, it is to ensure the pipe locking stability of the pipe locking member. When the metal pipe 1 is inserted into the quick pipe connector, the claw 7 will be pushed open by the metal pipe 1 and pass through the pipe locking member 5. At this time, the inner diameter value of the tip 10 is equal to the outer diameter value D1 of the metal pipe 1 until the tip of the claw 7 falls into the annular groove 2 of the metal pipe 1. The claw 7 will change the inner diameter value of the tip 10 under the action of its own elastic recovery. At this time, the size of the inner diameter value of the tip 10 should be smaller than D2 + 2H. The claw 7 falling into the annular groove 2 exerts a pre-pressure on the metal pipe 1, so that it is pre-pressed on the annular groove 2 of the metal pipe 1. When the metal pipe 1 is under pressure or pulled by an external force, there will be a tendency to separate from the quick pipe connector outward. At this time, under the action of the prestress, the claw 7 will firmly hold the annular groove 2 of the metal pipe 1 to prevent the metal pipe 1 from separating.

[0049] As one of the embodiments of the present invention, as Figure 13 shown, an elastic ring 11 is provided in the space on the side of the housing assembly 3 close to the pipe locking member 5, and the elastic ring 11 abuts against the surface of the claw 7 on the non-pipe insertion direction side.

[0050] Among them, due to possible metal fatigue after the claw 7 has locked the pipe for a long time, the prestress / pre-pressure of the original claw 7 for locking the pipe may disappear or weaken. An elastic elastic ring 11 is provided on the surface of the claw 7 on the non-pipe insertion direction side, which can apply a pre-pressure to the tip of the claw 7, so as to ensure that the claw 7 can continuously lock the pipe and increase the reliability of the connection of this connection structure.

[0051] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A metal pipe quick-connection structure, characterized in that: The connection structure is composed of a quick pipe connector and an annular groove provided on the surface of a metal pipe. The quick pipe connector is composed of a shell component, a sealing component, a pipe lock component and an auxiliary component. At least one annular groove is provided on the surface of the metal pipe. The pipe lock component has a plurality of claws distributed circumferentially along the inner edge. The ends of the claws are inserted into an annular groove on the surface of the metal pipe. The metal pipe is fitted in the quick-insertion port of the quick pipe connector in a non-detachable connection manner or in a detachable connection manner using an auxiliary component. The quick pipe connector is provided with one or more sealing components.

2. A metal pipe quick-connection structure according to claim 1, characterized in that: The minimum distance between the end of the claw inserted into the annular groove and the stop step in the shell assembly that limits the further insertion of the metal pipe is L1. When the metal pipe is inserted into the quick-insert port and abuts against the stop step, the maximum distance between the entire sealing assembly farthest from the metal pipe port and the port of the metal pipe in the axial direction of the metal pipe is L2. The value range of the distance C from the annular groove to the metal pipe port is between L2 and L1.

3. A metal pipe quick-connection structure according to claim 1, characterized in that: The cross-sectional shape of the annular groove is "V"-shaped, the inclined surface of the annular groove close to the port where the metal pipe is inserted into the quick-insert port has an inclination angle of ∠1, the inclination angle of the inclined surface in the annular groove away from the port side of the metal pipe is ∠2, the angle formed by the claw inserted into the annular groove and the plane parallel to the axial cross-section of the metal pipe is ∠3, the inclination angle of the inclined surface in the annular groove close to the port side of the metal pipe is ∠1>45° and ∠1≥90°-∠3, and the inclination angle of the inclined surface in the annular groove away from the port side of the metal pipe is ∠2≤∠3.

4. A metal pipe quick-connection structure according to claim 1, characterized in that: The cross-sectional shape of the annular groove is rectangular, and the end surface of the end of the claw inserted into the annular groove abuts against a notch edge line of the annular groove.

5. The metal pipe quick-connection structure according to claim 1, characterized in that: The metal pipe is detachably fitted in the quick-insert port, and the auxiliary component is fitted in the shell assembly and translates in the shell assembly in a manner where the whole is pushed by an external force or the whole is rotated by an external force. The auxiliary component translates in the shell assembly and pushes the claw away from the annular groove to enable the metal pipe to disengage from the claw.

6. A metal pipe quick-connection structure according to claim 1, characterized in that: An elastic ring is arranged in the space of the housing component close to the locking tube part, and the elastic ring presses against the surface of the claw on the non-insertion direction side.

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