Aluminum alloy male tube type joint

Abstract

The application relates to an aluminum alloy convex pipe type joint and relates to the technical field of pipe joints, which comprises an equal-diameter clamp pipe, the two ends of the equal-diameter clamp pipe are inserted with clamp inner parts, screwing caps are threadedly connected to the outer walls of the two ends of the equal-diameter clamp pipe, the clamp inner parts are located between the equal-diameter clamp pipe and the screwing caps, a first sealing ring is sleeved on the outer wall of the aluminum alloy pipe, a containing annular groove containing the first sealing ring is arranged on the clamp inner part and the screwing sleeve close to the inner wall of the aluminum alloy pipe, an operating sleeve is movably sleeved on the outer wall of the screwing cap, a first clamp sleeve capable of self-contracting is fixedly connected to the end of the screwing cap away from the equal-diameter clamp pipe, a second sealing ring is arranged in the first clamp sleeve, the second sealing ring is sleeved on the outer wall of the aluminum alloy pipe, and a first shrinkage assembly for driving the first clamp sleeve to shrink is arranged between the operating sleeve and the first clamp sleeve. The application has the function effect of more convenient and rapid leakage emergency treatment.

Description

Technical Field

[0001] This application relates to the field of pipe fitting technology, and in particular to an aluminum alloy convex pipe fitting. Background Technology

[0002] Pipe fittings are connecting tools between pipes, serving as detachable connection points between components and pipes. They play an indispensable and crucial role in pipe fittings, forming one of the main components connecting two pipes.

[0003] Existing and commonly used convex tube type fittings, such as Figure 1 As shown, the convex tube type connector includes a clamp 10 sleeved between two aluminum alloy tubes 1. Inner tube fittings 11 are inserted into both ends of the clamp 10. External threads are provided on the outer walls of both ends of the clamp 10. Locking nuts 12, which are fitted on the aluminum alloy tubes 1, are threaded onto the outer walls of both ends of the clamp 10. The inner tube fittings 11 are located between the clamp 10 and the locking nuts 12. A sealing ring 13 is sleeved on the outer wall of the aluminum alloy tubes 1. A receiving annular groove for accommodating the sealing ring 13 is provided between the inner tube fittings 11 and the locking nuts 12 near the inner wall of the aluminum alloy tubes 1. The sealing ring 13 is provided to achieve the sealing of the pipeline. When assembling two aluminum alloy tubes 1, first cut the aluminum alloy tubes 1 to a suitable length according to the requirements and remove the burrs from their mating ends. Then, insert the locking nut 12, sealing ring 13, and inner tube fitting 11 into the aluminum alloy tubes 1 one by one. Next, insert the ends of the two aluminum alloy tubes 1 into the clamp tube 10. Then, insert the inner tube fitting 11 into the end of the clamp tube 10 and the sealing ring 13 into the end of the inner tube fitting 11. Finally, thread the locking nut 12 to the clamp tube 10 to complete the assembly of the aluminum alloy tubes 1.

[0004] Regarding the above-mentioned related technologies, the inventors discovered a drawback: as the joint is used for a longer period of time, the sealing ring will gradually age, making it very easy for leakage to occur from both ends of the joint during high-pressure transportation of fluid media. At this time, the joint needs to be replaced. Before replacing the new joint, the leaking area is usually wrapped with sealing tape as an emergency treatment. However, the fluid media easily wets the sealing tape during the wrapping process, causing it to fold together and making it difficult to fix at the joint. Therefore, the sealing tape treatment is time-consuming and inconvenient, and this needs to be further improved. Summary of the Invention

[0005] To enable more convenient and rapid emergency handling of leaks in the joint, this application provides an aluminum alloy convex tube type joint.

[0006] The aluminum alloy convex tube type connector provided in this application adopts the following technical solution:

[0007] An aluminum alloy convex tube type connector includes equal-diameter clamps for fitting onto two aluminum alloy tubes. Clamping inner parts are inserted into both ends of the equal-diameter clamps. Threaded caps are threaded onto the outer walls of both ends of the equal-diameter clamps. The clamping inner parts are located between the equal-diameter clamps and the threaded caps. A first sealing ring is fitted onto the outer wall of each aluminum alloy tube. A receiving annular groove for accommodating the first sealing ring is formed between the clamping inner parts and the threaded caps near the inner wall of the aluminum alloy tube. An operating cylinder is movably fitted onto the outer wall of the threaded caps. A first clamping cylinder capable of retracting its radius is fixedly connected to the end of the threaded cap away from the equal-diameter clamps. A second sealing ring is disposed inside the first clamping cylinder and fitted onto the outer wall of the aluminum alloy tube. A first tightening component for driving the first clamping cylinder to retract is disposed between the operating cylinder and the first clamping cylinder.

[0008] By adopting the above technical solution, the first tightening component shrinks the metal of the first clamp, thereby tightening the second sealing ring and plugging the leakage at both ends of the joint. This method replaces the existing method of sealing tape, which can effectively reduce the occurrence of difficult operation, making it simpler and faster. In addition, there is no need to buy or pick up sealing tape. Emergency treatment can be achieved by directly operating the first tightening component on the joint, which is very convenient.

[0009] Optionally, the first clamping cylinder is a cylindrical body with a through hole in the middle. The upper and lower ends of the cylinder are evenly spaced along the extension direction of the cylinder and have deformation openings that communicate with the through hole. The deformation openings at the upper and lower ends are staggered. The second sealing ring is located inside the first clamping cylinder and is embedded in the deformation opening. The inner sidewall of the second sealing ring is provided with a tightening opening along the extension direction of the deformation opening.

[0010] By adopting the above technical solution, the deformation port is designed to facilitate the deformation of the first clamping cylinder, thereby achieving the tightening of the second sealing ring. The tightening port is also designed to facilitate the deformation of the first clamping cylinder, and at the same time, it is also designed to facilitate the overflow of the second sealing ring after it is tightened to fill the space.

[0011] Optionally, the first tightening assembly includes a limiting cylinder, which is fixedly connected to the outer wall of the first clamping cylinder. A sliding cavity is formed between the limiting cylinder and the first clamping cylinder. The sliding cavity is provided with an internal thread on the inner wall of the limiting cylinder. The end of the operating cylinder is provided with a tapered threaded ring that is threaded to the internal thread of the sliding cavity. The inner wall of the tapered threaded ring abuts against the outer wall of the first clamping cylinder.

[0012] By adopting the above technical solution, rotating the operating cylinder drives the tapered threaded ring to rotate. Under the restriction of the limiting cylinder, the tapered threaded ring is tightened and tightens the first clamping cylinder, which in turn tightens the second sealing ring, thus enabling emergency handling of leakage at the end of the screw cap. The operation is convenient.

[0013] Optionally, the equal-diameter clamp has a recessed abutment ring at the middle position that abuts against the end of the aluminum alloy tube.

[0014] By adopting the above technical solution, the set clamping concave ring is conducive to positioning the aluminum alloy tube inserted into the equal diameter clamp tube, and avoids the risk of leakage at the shorter end due to uneven positioning of the equal diameter clamp tube on the two aluminum alloy tubes.

[0015] Optionally, a square ring block is rotatably connected to the outer wall of the abutting concave ring, and a locking block is protruding from one end of the two screw caps near the square ring block. A locking bolt is connected through the square ring block and the two locking blocks.

[0016] By adopting the above technical solution, the locking bolts enhance the overall stability of the joint.

[0017] Optionally, a third sealing ring is fitted on the outer wall of the equal-diameter clamp tube near the side of the square ring block at the threaded connection with the screw cap, and a receiving ring groove for accommodating the third sealing ring is opened between the square ring block and the screw cap near the inner wall of the equal-diameter clamp tube.

[0018] By adopting the above technical solution, the third sealing ring further ensures the airtightness of the end of the screw cap near the thread.

[0019] Optionally, a fourth sealing ring is fitted on the outer wall between the square ring block and the screw cap, and a second clamping cylinder is provided outside the fourth sealing ring. The structure of the second clamping cylinder and the fourth sealing ring is the same as that of the first clamping cylinder and the second sealing ring. The end of the second clamping cylinder is fixedly connected to the end of the operating cylinder, and the end of the operating cylinder is provided with a second tightening component for driving the second clamping cylinder to tighten.

[0020] By adopting the above technical solution, the second tightening component drives the second clamp to tighten, thereby tightening the fourth sealing ring and realizing emergency treatment for leakage at the other end of the screw cap.

[0021] Optionally, the second tightening assembly includes a tapered helical ring. The square ring block has a sliding cavity near both sides of the operating cylinder. The inner wall of the sliding cavity has an internal thread. The tapered helical ring is disposed at the end of the operating cylinder and is threadedly connected to the internal thread of the sliding cavity. The inner wall of the tapered helical ring abuts against the outer wall of the second clamping cylinder.

[0022] By adopting the above technical solution, rotating the operating cylinder drives the conical screw ring to rotate. Under the constraint of the square ring block, the conical screw ring is tightened and tightens the second clamping cylinder, which in turn tightens the fourth sealing ring, thus enabling emergency handling of leakage at the other end of the screw cap. The operation is convenient.

[0023] Optionally, the operating cylinder is composed of two separate cylindrical bodies connected by a connecting rod, and the locking block has a semi-circular arc groove on the inner side near the screw cap for the connecting rod to slide through.

[0024] By adopting the above technical solution, the semi-circular arc groove helps to limit the rotation path of the operating cylinder, and also helps the operating cylinder and the screw cap to become an integral structure, reducing the possibility of parts loosening or being lost during use.

[0025] Optionally, a hemispherical protrusion is provided on the inner wall near one end of the semi-circular arc groove, and an embedding cavity is formed between the hemispherical protrusion and the inner wall of the end of the semi-circular arc groove for the connecting rod to be embedded and engaged.

[0026] By adopting the above technical solution, the embedded cavity is beneficial for clamping after emergency treatment by rotating the operating cylinder, thereby increasing the stability of the structure after operation.

[0027] In summary, the beneficial technical effects of this application are as follows:

[0028] The first tightening component shrinks the metal of the first clamp, thereby tightening the second sealing ring and sealing any leaks at both ends of the joint. This method replaces the existing method of using sealing tape, effectively reducing operational difficulties and making the process simpler and faster. It also eliminates the need to purchase or retrieve sealing tape, as emergency treatment can be achieved simply by operating the first tightening component on the joint, making it very convenient. Attached Figure Description

[0029] Figure 1 This is a cross-sectional schematic diagram of the prior art structure in the background art of this application.

[0030] Figure 2 This is a schematic cross-sectional view of an embodiment of this application.

[0031] Figure 3 This is a three-dimensional structural diagram of the first clamp and the second sealing ring in an embodiment of this application.

[0032] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0033] Figure 5 yes Figure 1 Enlarged view of section B in the middle.

[0034] Figure 6 This is a side sectional view of the connection structure between the operating cylinder and the locking block in an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Aluminum alloy tube; 10. Tube clamp; 11. Inner tube fitting; 12. Locking nut; 13. Sealing ring; 2. Equal diameter tube clamp; 20. Inner tube clamp fitting; 21. Screw cap; 22. Operating cylinder; 23. First sealing ring; 3. First clamp; 30. Second sealing ring; 31. Deformation port; 32. Tightening port; 4. Restricting cylinder; 40. Tapered threaded ring; 5. Abutment concave ring; 50. Square ring block; 51. Locking square block; 52. Locking bolt; 53. Third sealing ring; 6. Fourth sealing ring; 60. Second clamp; 61. Tapered threaded ring; 7. Connecting rod; 70. Semi-circular arc groove; 71. Semi-spherical protrusion; 72. Embedded cavity. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 2-6 This application will be described in further detail.

[0037] This application discloses an aluminum alloy convex tube type connector. (Refer to...) Figure 2 and Figure 3 The aluminum alloy convex tube type connector includes an equal-diameter clamp tube 2, which is fitted onto two aluminum alloy tubes 1. Clamping inner parts 20 are inserted into both ends of the equal-diameter clamp tube 2. Threaded caps 21 are threaded onto the outer walls of both ends of the equal-diameter clamp tube 2. Both the clamping inner parts 20 and the threaded caps 21 are fitted onto the aluminum alloy tubes 1, with the clamping inner parts 20 located between the equal-diameter clamp tube 2 and the threaded caps 21. A first sealing ring 23 is fitted onto the outer wall of the aluminum alloy tube 1, and a receiving annular groove for accommodating the first sealing ring 23 is formed between the clamping inner parts 20 and the threaded caps 21 near the inner wall of the aluminum alloy tube 1.

[0038] Because the first sealing ring 23 will be damaged due to aging, the substance inside the aluminum alloy tube 1 will leak from the non-threaded part of the screw cap 21. In order to enable immediate emergency treatment without tools after leakage occurs, an operating cylinder 22 is movably sleeved on the outer wall of the screw cap 21. At the same time, a first clamping cylinder 3 is fixedly connected to the end of the screw cap 21 away from the equal-diameter clamping tube 2. The first clamping cylinder 3 can shrink its radius. A second sealing ring 30 is provided inside the first clamping cylinder 3. The second sealing ring 30 is sleeved on the outer wall of the aluminum alloy tube 1. A first tightening component is provided between the operating cylinder 22 and the first clamping cylinder 3. The first tightening component can drive the first clamping cylinder 3 to shrink. By shrinking the radius of the first clamping cylinder 3 through the first tightening component, the second sealing ring 30 is squeezed. After being squeezed and deformed, the second sealing ring 30 is tightly pressed against the outer wall of the aluminum alloy tube 1, thereby preventing the substance from leaking.

[0039] It is worth noting that the second sealing ring 30 is in a naturally relaxed state when not in emergency use, and is merely attached to the outside of the aluminum alloy tube 1 without deformation. Therefore, the service life of the second sealing ring 30 will be longer than that of the first sealing ring 23.

[0040] Specifically, the first clamping cylinder 3 is a cylinder with a through hole in the middle along its extension direction. Deformation openings 31 are evenly spaced at both ends of the cylinder along its extension direction. The deformation openings 31 are connected to the through hole. The deformation openings 31 at both ends are staggered. The length of the deformation openings 31 at both ends is less than the length of the cylinder to prevent the cylinder from breaking as a whole. Meanwhile, the second sealing ring 30 is located inside the first clamping cylinder 3 and is embedded in the deformation port 31. The inner sidewall of the second sealing ring 30 is provided with a constriction port 32 with a triangular cross-section along the extension direction of the deformation port 31. The constriction port 32 has a triangular cross-section and the two corners of the triangle at the bottom edge are concave. The opening depth of the constriction port 32 extends into the deformation port 31. This setting is conducive to the deformation of the first clamping cylinder 3 and is not easily affected by the overflow of the second sealing ring 30 due to the extrusion reaction. In addition, the cross-sectional shape of the constriction port 32 of the second sealing ring 30 is conducive to the second sealing ring 30 being squeezed and closed near the inner wall of the aluminum alloy tube 1 and deformed to fill the constriction port 32, thus ensuring the sealing performance of the second sealing ring 30 after extrusion.

[0041] Furthermore, refer to Figure 4 In this embodiment, the first tightening component includes a limiting cylinder 4, which is integrally formed on the outer wall of the first clamping cylinder 3. A sliding cavity is formed between the limiting cylinder 4 and the first clamping cylinder 3. The radius of the sliding cavity gradually decreases in the direction of the equal-diameter clamping tube 2. An internal thread is provided on the inner wall of the sliding cavity located in the limiting cylinder 4. A tapered threaded ring 40 is provided at the end of the operating cylinder 22 away from the equal-diameter clamping tube 2. Two opposing first notches are provided on the ring wall of the tapered threaded ring 40 along its own extension direction. The tapered threaded ring 40 is threadedly connected to the internal thread of the sliding cavity. The inner wall of the tapered threaded ring 40 abuts against the outer wall of the first clamping cylinder 3. By rotating the operating cylinder 22, the tapered threaded ring 40 is driven to rotate. Under the limiting action of the limiting cylinder 4, the tapered threaded ring 40 is tightened and tightens the first clamping cylinder 3, thereby tightening the second sealing ring 30, realizing emergency handling of leakage at the end of the screw cap 21.

[0042] In addition, refer to Figure 2 In this embodiment, a recessed abutment ring 5 is provided in the middle of the equal-diameter clamp 2, at the junction of the two aluminum alloy tubes 1. The abutment ring 5 abuts against the end of the aluminum alloy tube 1, and the thickness of the abutment ring 5 is the same as the thickness of the aluminum alloy tube 1. Specifically, the abutment ring 5 is formed by extruding the middle of the equal-diameter clamp 2 inward through an extrusion device. The abutment ring 5 being located in the middle of the equal-diameter clamp 2 helps to position the aluminum alloy tube 1 when inserted into the equal-diameter clamp 2, and minimizes the risk of leakage at the shorter end due to uneven placement of the equal-diameter clamp 2 on the two aluminum alloy tubes 1.

[0043] In addition, refer to Figure 2In this embodiment, in order to prevent the screw cap 21 from loosening after being threaded onto the outer wall of the equal-diameter clamp tube 2, a square ring block 50 is rotatably connected at the outer wall of the abutting concave ring 5. Since the abutting concave ring 5 is a recessed structure of the equal-diameter clamp tube 2 facing inward, the outer wall of the equal-diameter clamp tube 2 also forms an annular groove for the square ring block 50 to be rotatably connected. At the same time, a locking block 51 is protruding at one end of the two screw caps 21 near the square ring block 50. A locking bolt 52 is connected through the square ring block 50 and the two locking blocks 51 to enhance the stability of the overall joint.

[0044] Because the first sealing ring 23 is damaged due to aging, the substance inside the aluminum alloy tube 1 may leak from the thread of the screw cap 21. Therefore, in this embodiment, a third sealing ring 53 is fitted on the outer wall of the equal diameter clamp tube 2 near the side of the square ring block 50 at the threaded connection with the screw cap 21. A receiving ring groove for accommodating the third sealing ring 53 is opened between the square ring block 50 and the screw cap 21 near the inner wall of the equal diameter clamp tube 2. This setting further ensures the airtightness of the screw cap 21 near the thread.

[0045] Furthermore, refer to Figure 2 and Figure 5 Since the first sealing ring 23 and the third sealing ring 53 are subjected to similar compression pressure, they may age simultaneously. Therefore, in order to enable immediate emergency treatment without tools after leakage occurs at the third sealing ring 53, a fourth sealing ring 6 is fitted on the outer wall between the square ring block 50 and the screw cap 21. A second clamping cylinder 60 is provided outside the fourth sealing ring 6. The structure of the second clamping cylinder 60 and the fourth sealing ring 6 is consistent with the shape and connection structure of the first clamping cylinder 3 and the second sealing ring 30. The end of the second clamping cylinder 60 is integrally formed on the end of the operating cylinder 22 near the square ring block 50. A second tightening component is provided at the end of the operating cylinder 22. The second tightening component can drive the radius of the second clamping cylinder 60 to tighten.

[0046] Specifically, the second tightening component includes a conical helical ring 61. The square ring block 50 has sliding cavities on both sides near the operating cylinder 22. The inner wall of the sliding cavity has internal threads. The radius of the sliding cavity gradually increases towards the operating cylinder 22. The conical helical ring 61 is integrally formed on one end of the operating cylinder 22 near the square ring block 50. The conical helical ring 61 is threaded to the internal threads of the sliding cavity. The ring wall of the conical helical ring 61 has two opposing second notches along its own extension direction. The inner wall of the conical helical ring 61 abuts against the outer wall of the second clamping cylinder 60. Its tightening principle is the same as that of the first tightening component, and will not be described in detail. In this application, there is a possibility of leakage at both ends of the screw cap 21. If an emergency treatment is carried out for leakage at one end of the screw cap 21 that is opposite to each other, there is a risk that the other end of the screw cap 21 will also leak due to increased pressure. In addition, the other end itself also has a risk of leakage. Therefore, this application can perform the tightening operation on both tightening components at the same time by rotating the operating cylinder 22 once towards the square ring block 50, which is very convenient.

[0047] Furthermore, refer to Figure 2 and Figure 6 In this embodiment, the operating cylinder 22 is composed of two separate cylinders connected by a connecting rod 7. The locking block 51 is provided with a semi-circular arc groove 70 evenly distributed near the inner side of the screw cap 21. The semi-circular arc groove 70 allows the connecting rod 7 to slide through. The connecting rod 7 can slide along the extension direction of the operating cylinder 22 and can also rotate along the arc direction of the semi-circular arc groove 70. The semi-circular arc groove 70 helps to limit the rotation path of the operating cylinder 22, and also helps the operating cylinder 22 and the screw cap 21 to become an integral structure, reducing the possibility of parts loosening or being lost during use.

[0048] Furthermore, a hemispherical protrusion 71 is provided on the inner wall of the semi-circular arc groove 70 near one end. An embedding cavity 72 is formed between the hemispherical protrusion 71 and the inner wall of the end of the semi-circular arc groove 70 for the connecting rod 7 to be embedded and locked. The embedding cavity 72 is conducive to locking after emergency treatment by rotating the operating cylinder 22, increasing the stability of the structure after operation, improving the replacement cycle time, and ensuring the normal operation of the aluminum alloy tube 1 during the replacement cycle.

[0049] The implementation principle of this application embodiment is as follows: when the joint leaks, the operating cylinder 22 can be rotated. The rotation of the operating cylinder 22 drives the tapered threaded ring 40 to rotate. Under the restriction of the limiting cylinder 4, the tapered threaded ring 40 is tightened. The tightening of the diameter of the tapered threaded ring 40 will tighten the first clamping cylinder 3, and then tighten the second sealing ring 30, so as to realize emergency treatment for the leakage at the end of the screw cap 21.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An aluminum alloy convex tube type connector, characterized in that, include: Equal diameter clamps (2) are used to be fitted onto two aluminum alloy tubes (1). The equal diameter clamps (2) have clamping inner parts (20) inserted at both ends. The outer walls of the equal diameter clamps (2) are threaded with screw caps (21). The clamping inner parts (20) are located between the equal diameter clamps (2) and the screw caps (21). A first sealing ring (23) is fitted on the outer wall of the aluminum alloy tube (1). A receiving annular groove for accommodating the first sealing ring (23) is opened between the inner part of the clamping tube (20) and the screw cap (21) near the inner wall of the aluminum alloy tube (1). An operating cylinder (22) is movably fitted on the outer wall of the screw cap (21). A first clamping cylinder (3) that can shrink its own radius is fixedly connected to the end of the screw cap (21) away from the equal diameter clamping tube (2). A second sealing ring (30) is provided inside the first clamping cylinder (3). The second sealing ring (30) is fitted on the outer wall of the aluminum alloy tube (1). A first tightening component for driving the first clamping cylinder (3) to shrink is provided between the operating cylinder (22) and the first clamping cylinder (3). The equal diameter clamp (2) has a recessed abutment ring (5) in the middle position that abuts against the end of the aluminum alloy tube (1). A square ring block (50) is rotatably connected to the outer wall of the abutting concave ring (5). Two screw caps (21) are provided with locking blocks (51) protruding from one end near the square ring block (50). A locking bolt (52) is connected through the square ring block (50) and the two locking blocks (51). Among them, a fourth sealing ring (6) is sleeved on the outer wall between the square ring block (50) and the screw cap (21), and a second clamping cylinder (60) is provided outside the fourth sealing ring (6). The structure of the second clamping cylinder (60) and the fourth sealing ring (6) is the same as that of the first clamping cylinder (3) and the second sealing ring (30). The end of the second clamping cylinder (60) is fixedly connected to the end of the operating cylinder (22), and the end of the operating cylinder (22) is provided with a second tightening component for driving the second clamping cylinder (60) to tighten. Furthermore, the second tightening assembly includes a conical helical ring (61), and the square ring block (50) has a sliding cavity on both sides near the operating cylinder (22). The inner wall of the sliding cavity has an internal thread. The conical helical ring (61) is disposed at the end of the operating cylinder (22). The conical helical ring (61) is threaded to the internal thread of the sliding cavity. The inner wall of the conical helical ring (61) abuts against the outer wall of the second clamping cylinder (60).

2. The aluminum alloy convex tube type connector according to claim 1, characterized in that: The first clamp (3) is a cylinder with a through hole in the middle. The upper and lower ends of the cylinder are evenly spaced along the extension direction of the cylinder and have deformation openings (31) that communicate with the through hole. The deformation openings (31) at the upper and lower ends are staggered. The second sealing ring (30) is located inside the first clamp (3). The second sealing ring (30) is embedded in the deformation opening (31), and the inner sidewall of the second sealing ring (30) has a tightening opening (32) along the extension direction of the deformation opening (31).

3. The aluminum alloy convex tube type connector according to claim 2, characterized in that: The first tightening assembly includes a limiting cylinder (4), which is fixedly connected to the outer wall of the first clamping cylinder (3). A sliding cavity is formed between the limiting cylinder (4) and the first clamping cylinder (3). The sliding cavity is provided with an internal thread on the inner wall of the limiting cylinder (4). The end of the operating cylinder (22) is provided with a tapered threaded ring (40) that is threaded to the internal thread of the sliding cavity. The inner wall of the tapered threaded ring (40) abuts against the outer wall of the first clamping cylinder (3).

4. The aluminum alloy convex tube type connector according to claim 1, characterized in that: A third sealing ring (53) is fitted on the outer wall of the equal diameter clamp (2) near the side of the square ring block (50) at the threaded connection with the screw cap (21). A receiving ring groove for accommodating the third sealing ring (53) is opened between the square ring block (50) and the screw cap (21) near the inner wall of the equal diameter clamp (2).

5. An aluminum alloy convex tube type connector according to claim 1, characterized in that: The operating cylinder (22) is composed of two separate cylinders connected by a connecting rod (7). The locking block (51) has a semi-circular arc groove (70) on the inner side near the screw cap (21) for the connecting rod (7) to slide through.

6. An aluminum alloy convex tube type connector according to claim 5, characterized in that: The semi-circular groove (70) has a hemispherical protrusion (71) on the inner side wall near one end. An embedding cavity (72) for the connecting rod (7) to be embedded and engaged is formed between the hemispherical protrusion (71) and the inner wall of the end of the semi-circular groove (70).

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