Adjustable duct piece connecting piece

Abstract

The invention relates to the technical field of shield tunnel engineering, in particular to an adjustable pipe piece connecting piece which comprises an outer pipe, the outer pipe is rotationally connected to an inner pipe, a locking piece is connected to the inner pipe, the end of the locking piece is arranged away from the outer pipe, threaded parts are arranged on the inner walls of the two ends of the outer pipe correspondingly, and sliding grooves are formed in the side walls of the two ends of the inner pipe correspondingly; the sliding grooves are in sliding connection with the sliding blocks, the sliding blocks are installed on the inner walls of the ends of the telescopic pipes, threads at the ends of the telescopic pipes are in threaded connection with the threaded parts, the telescopic pipes are moved by rotating the outer pipes forwards or reversely, finally, the overall length of the adjusting mechanism is increased or decreased, then one side of the mechanism is inserted into one installation groove, and the locking pieces lock one installation groove. When the ends of the two duct pieces are in contact, the mechanism is inserted into the other mounting groove and locks the other mounting groove, the adaptation capacity of the mechanism with the length adjusted to the mounting grooves with different depths and inner diameters is greatly improved, and the applicability of the mechanism under different working conditions is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shield tunnel engineering, and in particular to an adjustable pipe segment connector. Background Art

[0002] With the development of the times and the advancement of technology, underground space development has developed rapidly, and the shield method has been widely used as a safe and efficient construction method. The shield method is a fully mechanized construction method. During the advancement of the shield machine, the soil is excavated in front of the excavation face with a cutting device, and the surrounding rock is supported by the shield shell and segments to prevent collapse. The shield machine excavates in the front, and the precast concrete segments are assembled in the rear as the shield shell moves forward to form a tunnel structure. The structure of the shield segment joint is generally divided into connectors, convex and concave tenons, force transmission pads, elastic sealing pads, etc. More than 80% of tunnels at home and abroad are connected by connectors. Segment bolts are the most important tunnel connectors. Common segment bolts on the market generally include single-bend bolts and short double straight bolts. In the process of assembling the segments, the longitudinal annular bolts need to be inserted into the bolt holes, the nuts are put on and tightened with an electric wrench, and the pneumatic wrench is used for secondary tightening after the segments are separated from the shield tail.

[0003] However, the prior art still has shortcomings. For example, patent number: CN214836385U is a pipe segment socket connector, which includes a first embedded part, a connecting rod and a second embedded part; the outer walls of the first and second embedded parts are provided with a plurality of anti-retraction threads, and the outer wall of the first embedded part is provided with a plurality of anchor points and at least two anti-rotation reinforcement ribs; the first embedded part is sleeved on the first end of the connecting rod, and the two are threadedly connected; the second embedded part is sleeved on the second end of the connecting rod, and the two are snap-connected; an array of elastic cards is evenly distributed axially on the inner wall of the second embedded part, and each group of elastic cards is contracted forward to form a unidirectional expansion bayonet. The length of the mechanism is fixed, so when connecting pipe segments with installation grooves of different depths, the mechanism needs to be replaced to meet the needs of pipe segment connection, and the applicability is extremely low. Summary of the invention

[0004] The present invention provides an adjustable pipe segment connector to solve the problem raised in the background technology.

[0005] In order to achieve the above-mentioned invention objectives, the present invention provides the following technical solutions: an adjustable pipe segment connector, comprising: an outer tube, an inner tube, a telescopic tube, a slide groove and a slider, the outer tube is rotatably connected to the inner tube, a locking piece is connected to the inner tube, the end of the locking piece is arranged away from the outer tube, the inner walls at both ends of the outer tube are provided with threaded portions, the side walls at both ends of the inner tube are respectively provided with a slide groove, the slide groove is slidably connected to the slider, the slider is installed on the inner wall of the end of the telescopic tube, the thread at the end of the telescopic tube is threadedly connected to the threaded portion, and the other end of the telescopic tube is arranged away from the outer tube.

[0006] Preferably, the locking member comprises: a notch, a second notch, a rod and a connecting member, a plurality of second notches are provided through the side of the telescopic tube, the second notch is arranged away from the end of the outer tube, the second notch is arranged concentrically with the notch, the area of ​​the second notch is larger than the area of ​​the notch, the notch is provided through the side of the inner tube, a rod is longitudinally slidably connected in the notch, the rod is placed in the second notch, and the bottom of the rod is connected to the telescopic tube through the connecting member.

[0007] Preferably, the rod member includes: a rod body, a mounting plate, a spring and a sleeve, the slot is longitudinally slidably connected to the rod body, the rod body is placed in slot two, the mounting plate on the rod body is connected to the bottom of the spring, the top of the spring is connected to the bottom of the sleeve, the jack at the bottom of the sleeve is slidably connected to the top of the rod body, a dome is provided on the top of the sleeve, the bottom of the rod body is connected to the telescopic tube through a connecting piece, and the dome is arranged away from the side wall of the outer tube.

[0008] Preferably, the connecting member includes: a guide block, a guide block 2, a connecting rod and a pressure plate, the bottom of the rod body is connected to the top of the guide block, the bottom of the guide block is provided with a slope, the slope is arranged toward the inner tube, the slope is slidably matched with the slope 2, the slope 2 is arranged on the top of the guide block 2, the side of the guide block 2 is connected to the end of the connecting rod, the other end of the connecting rod is connected to the pressure plate, and the pressure plate is connected to the inner wall of the telescopic tube.

[0009] Preferably, the other end of the telescopic tube is connected with a rubber tube.

[0010] Preferably, a through hole is opened in the middle of the pressure plate, the through hole is slidably sealed with the connecting rod, one end of the connecting rod is connected to the load-bearing plate, and the load-bearing plate is connected to the inner wall of the inner tube.

[0011] Preferably, the other end of the connecting rod is connected to the piston disk, the piston disk is slidably sealed with the inner wall of the telescopic tube, a pressure chamber is formed between the inner wall of the telescopic tube, the pressure disk and the piston disk, an injection hole is opened on the inner wall of the pressure chamber, a one-way valve is provided in the injection hole, and adhesive is injected into the pressure chamber.

[0012] Preferably, a plurality of guide tubes are connected to the piston disc, one end of the guide tube is placed in the pressure chamber, the second through hole on the rubber tube is slidably sealed with the guide tube, and the other end of the guide tube is placed in the rubber tube.

[0013] Preferably, a plurality of rupture grooves are provided on the inner wall of the rubber tube away from the piston disc, and the cross-section of the rupture grooves is an inverted triangle.

[0014] Preferably, the end portions of a plurality of guide pieces are connected to the side wall of the telescopic tube, and the bottom wall of the rupture groove is arranged toward the guide pieces.

[0015] The beneficial effects of the present invention are as follows:

[0016] In the scheme of the present invention:

[0017] By rotating the outer tube forward or reversely, the telescopic tube is moved, and the overall length of the adjustment mechanism is finally increased or decreased. Subsequently, one side of the mechanism is inserted into the installation groove, and the locking piece locks one installation groove. When the ends of the two pipe segments are in contact, the mechanism is inserted into the other installation groove and locked. The mechanism after the length adjustment greatly improves the ability to adapt to installation grooves of different depths and inner diameters, and improves the applicability of the mechanism under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the main structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the sliding connection relationship between the rod body and the sleeve of the present invention;

[0021] Figure 4 It is a schematic diagram of the connection relationship between the rod body and the guide block of the present invention;

[0022] Figure 5 It is a schematic diagram of the connection relationship between the telescopic tube and the rubber tube of the present invention;

[0023] Figure 6 It is a schematic diagram of the connection relationship between the connecting rod and the load-bearing plate of the present invention;

[0024] Figure 7 It is a schematic diagram of the relative position relationship between the piston disk and the guide tube of the present invention;

[0025] Figure 8 It is a schematic diagram of the location of the rupture groove of the present invention;

[0026] Fig. 9 It is a cross-sectional view of the rupture groove of the present invention.

[0027] Among them: outer tube 1, inner tube 2, telescopic tube 3, slide groove 4, slider 5, locking piece 6, notch 2 7, rod 8, notch 9, rod body 10, mounting plate 11, spring 12, sleeve 13, guide block 14, guide block 2 15, connecting rod 16, pressure plate 17, rubber tube 18, connecting rod 19, load-bearing plate 20, piston plate 21, guide tube 22, rupture groove 23, guide sheet 24. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] Example 1: Reference Figure 1-Figure 9A spring self-locking pipe segment connector comprises: an outer tube 1, an inner tube 2, a telescopic tube 3, a slide groove 4, a slider 5 and a locking piece 6. The outer tube 1 is rotatably connected to the inner tube 2, and the inner tube 2 is connected with the locking piece 6. The end of the locking piece 6 is arranged away from the outer tube 1. The inner walls at both ends of the outer tube 1 are provided with threaded parts, and the side walls at both ends of the inner tube 2 are respectively provided with a slide groove 4. The slide groove 4 is slidably connected with the slider 5. The slider 5 is installed on the inner wall of the end of the telescopic tube 3. The thread at the end of the telescopic tube 3 is threadedly connected with the threaded part, and the other end of the telescopic tube 3 is arranged away from the outer tube 1.

[0030] The principles and beneficial effects of the above scheme are:

[0031] Affected by the bearing capacity and inner diameter of the pipe segment, the depth and inner diameter of the installation groove of the pipe segment are different. The pipe segment with strong bearing capacity or large inner diameter has a deeper installation groove with a larger inner diameter, and the pipe segment with ordinary bearing capacity or relatively small inner diameter has a shallower installation groove with a smaller inner diameter. Therefore, the installation groove needs to be measured before using the connector. After measuring the depth and inner diameter of the installation groove of the pipe segment, the operator keeps a telescopic tube 3 fixed, and then rotates the outer tube 1 forward or reverse. During the rotation of the outer tube 1, its threaded portion rotates synchronously, and the threaded portion is connected to the thread at the end of the telescopic tube 3. Therefore, under the guidance of the slide groove 4, the slider 5 can drive the telescopic The tube 3 moves outward or inward. After the telescopic tube 3 moves outward, the overall length of the mechanism increases. After the telescopic tube 3 moves inward, the overall length of the mechanism decreases. By rotating the outer tube 1 forward or reversely, the telescopic tube 3 is moved, and finally the overall length of the mechanism is increased or decreased. Subsequently, one side of the mechanism is inserted into the installation groove, and the locking piece 6 locks one installation groove. When the ends of the two pipe segments contact each other, the mechanism is inserted into the other installation groove and locked. The mechanism after the length adjustment greatly improves the adaptability to installation grooves of different depths and inner diameters, and improves the applicability of the mechanism under different working conditions.

[0032] Example 2: Reference Figure 1-Figure 9 The locking member 6 includes: a notch 9, a second notch 7, a rod 8 and a connecting member. A plurality of second notches 7 are provided through the side of the telescopic tube 3. The second notch 7 is arranged away from the end of the outer tube 1. The second notch 7 is arranged concentrically with the notch 9. The area of ​​the second notch 7 is larger than that of the notch 9. The notch 9 is provided through the side of the inner tube 2. A rod 8 is longitudinally slidably connected in the notch 9. The rod 8 is placed in the second notch 7. The bottom of the rod 8 is connected to the telescopic tube 3 through a connecting member.

[0033] The principles and beneficial effects of the above scheme are:

[0034] During the adjustment of the length of the mechanism, the length of the locking member 6 is adjusted synchronously. When the mechanism is lengthened, the length of the rod 8 becomes longer, and when the mechanism is shortened, the length of the rod 8 becomes shorter. During the length change of the rod 8, the rod 8 can slide longitudinally in the slot 9.

[0035] The connecting piece in the mechanism fixes the bottom of the rod 8, the slot 2 7 is concentrically arranged with the slot 9, and the area of ​​the slot 2 7 is larger than the area of ​​the slot 9. During the process of inserting the mechanism into the installation slot, the end of the rod 8 contacts the side of the pipe segment, and the mechanism continues to be moved, and the rod 8 moves downward. When one side of the mechanism is completely moved into the installation slot, the rod 8 applies pressure upward and locks the mechanism in an installation slot. When connecting two pipe segments, after the other installation slot is aligned with the other side of the rod 8, the moving pipe segment can complete the locking of the two pipe segments by the mechanism; at the same time, since multiple rods 8 are arranged on the side of the mechanism, the coaxiality of the mechanism and the installation slot can be improved, which is convenient for more accurate connection of the two pipe segments and greatly reduces the difficulty of connecting the pipe segments; the area of ​​the slot 2 7 is larger than the area of ​​the slot 9, so in the process of the telescopic tube 3 moving outward, the inner wall of the slot 2 7 will not cause impact on the side of the rod 8.

[0036] Example 3: Reference Figure 1-Figure 9 The rod 8 includes: a rod body 10, a mounting plate 11, a spring 12 and a sleeve 13. The slot 9 is longitudinally slidably connected to the rod body 10. The rod body 10 is placed in the slot 2 7. The mounting plate 11 on the rod body 10 is connected to the bottom of the spring 12. The top of the spring 12 is connected to the bottom of the sleeve 13. The jack at the bottom of the sleeve 13 is slidably connected to the top of the rod body 10. A dome is provided on the top of the sleeve 13. The bottom of the rod body 10 is connected to the telescopic tube 3 through a connector, and the dome is arranged away from the side wall of the outer tube 1.

[0037] The principles and beneficial effects of the above scheme are:

[0038] In the process of inserting the mechanism into the installation slot, the side of the sleeve 13 first contacts the side of the pipe segment, and the mechanism continues to move. After the dome on the top of the sleeve 13 contacts the inner wall edge of the installation slot, the sleeve 13 moves downward along the rod body 10, and the spring 12 is compressed. Finally, after the mechanism is inserted into the installation slot, the upward elastic force of the spring 12 locks the mechanism with the installation slot, thereby realizing the locking of the mechanism in the installation slot. The setting of the installation plate 11 provides a force support point for the spring 12, thereby improving the stability of the parts after installation. At the same time, due to the different types of pipe segments, the inner wall of the installation slot is different, and the locking capacity of the installation slots with different inner diameters can be further met by changing the length of the spring 12.

[0039] Example 4: Reference Figure 1-Figure 9The connecting member includes: a guide block 14, a guide block 15, a connecting rod 16 and a pressure plate 17. The bottom of the rod body 10 is connected to the top of the guide block 14. The bottom of the guide block 14 is provided with an inclined surface, which is arranged toward the inner tube 2. The inclined surface is slidably matched with the inclined surface 2. The inclined surface 2 is arranged on the top of the guide block 15. The side of the guide block 15 is connected to the end of the connecting rod 16. The other end of the connecting rod 16 is connected to the pressure plate 17, and the pressure plate 17 is connected to the inner wall of the telescopic tube 3.

[0040] The principles and beneficial effects of the above scheme are:

[0041] In the process of adjusting the length of the telescopic tube 3, when the telescopic tube 3 moves outward and drives the pressure plate 17 to move, the guide block 2 15 and the connecting rod 16 move synchronously, the inclined plane 2 slides with the inclined plane, the guide block 14 drives the rod body 10 to move upward, and the rod body 10 moves upward along the slot 9; when the telescopic tube 3 moves inward and drives the pressure plate 17 to move in the opposite direction, the guide block 2 15 and the connecting rod 16 move in the opposite direction synchronously, the inclined plane 2 slides with the inclined plane, and under the action of gravity, the rod body 10 moves downward along the slot 9. The setting of the guide block 14 and the guide block 2 15 facilitates the advance adjustment of the height of the rod body 10 in the installation groove. The setting of the pressure plate 17 increases the structural strength of the telescopic tube 3 without increasing the weight of the mechanism.

[0042] Example 5: Reference Figure 1-Figure 9 The other end of the telescopic tube 3 is connected to a rubber tube 18.

[0043] The principles and beneficial effects of the above scheme are:

[0044] When the mechanism is plugged into the mounting groove, the two pipe segments are connected. When the two pipe segments are relatively close to each other, the inner wall of the mounting groove squeezes the rubber tube 18, and the rubber tube 18 provides a buffer for the mechanism. When the two pipe segments move in an interlaced manner, the rubber tube 18 can rub against the inner wall of the mounting groove and, with the cooperation of the sleeve 13, prevent the mechanism from being displaced on the axis of the mounting groove.

[0045] Example 6: Reference Figure 1-Figure 9 A through hole is opened in the middle of the pressure plate 17, and the through hole is slidably sealed with the connecting rod 19. One end of the connecting rod 19 is connected to the bearing plate 20, and the bearing plate 20 is connected to the inner wall of the inner tube 2.

[0046] The principles and beneficial effects of the above scheme are:

[0047] The load-bearing plate 20 increases the bearing capacity and structural strength of the inner tube 2 without increasing the weight of the inner tube 2. When the telescopic tube 3 moves outward or inward, the through hole and the connecting rod 19 slide relative to each other. The connecting rod 19 guides the movement of the pressure plate 17, thereby auxiliary improving the stability of the movement of the telescopic tube 3. At the same time, it prevents the telescopic tube 3 from deflecting relative to the outer tube 1 due to the lack of a support point inside the telescopic tube 3 after the telescopic tube 3 moves outward for a long distance relative to the outer tube 1, thereby further improving the safety of the structure when in use.

[0048] Example 7: Reference Figure 1-Figure 9 The other end of the connecting rod 19 is connected to the piston disc 21, and the piston disc 21 is slidably sealed with the inner wall of the telescopic tube 3. A pressure chamber is formed between the inner wall of the telescopic tube 3, the pressure disc 17 and the piston disc 21. A liquid injection hole is opened on the inner wall of the pressure chamber, and a one-way valve is arranged in the liquid injection hole. Adhesive is injected into the pressure chamber.

[0049] The principles and beneficial effects of the above scheme are:

[0050] When the telescopic tube 3 moves outward, the volume of the pressure chamber decreases, and when the telescopic tube 3 moves inward, the volume of the pressure chamber increases. The pressure chamber is filled with adhesive, and the adhesive is specifically epoxy resin adhesive. The adhesive can be added by injecting through the injection hole. The setting of the one-way valve can facilitate the replenishment of the adhesive and prevent the leakage of the adhesive. The setting of the adhesive can serve as an auxiliary connection between the mechanism and the mounting groove, and the pressure chamber can be used as a storage space for the adhesive.

[0051] Example 8: Reference Figure 1-Figure 9 The piston disc 21 is connected with a plurality of guide tubes 22 , one end of the guide tube 22 is placed in the pressure chamber, the through hole 2 on the rubber tube 18 is slidably sealed with the guide tube 22 , and the other end of the guide tube 22 is placed in the rubber tube 18 .

[0052] The principles and beneficial effects of the above scheme are:

[0053] It is known from the prior art that pipe segments with different load-bearing capacities have installation grooves of different depths. Therefore, setting a pressure chamber in the mechanism can not only provide storage space for the adhesive, but also can adjust the length of the telescopic tube 3, thereby adjusting the spacing between the piston plate 21 and the pressure plate 17 to reduce or increase, and then inject the adhesive stored in the pressure chamber into the rubber tube 18 through the guide tube 22, or inject the adhesive in the rubber tube 18 into the pressure chamber through the guide tube 22, thereby increasing or decreasing the volume of the rubber tube 18. The rubber tube 18 itself can serve as a buffer structure between the mechanism and the installation groove, and the purpose of adjusting the length of the telescopic tube 3 and thereby changing the volume of the rubber tube 18 is to enable the rubber tube 18 in the mechanism to adapt to the ability to perfectly contact the inner wall of the installation groove of different depths, thereby realizing the adaptability of the mechanism to different installation grooves, so that the rubber tube 18 can better play its buffering ability;

[0054] The rubber tube 18 is made of rubber, so it has great friction. After the connection of the pipe segments is completed, when the pipe segments are subjected to force, the rubber tube 18 can provide friction for the mechanism by using the characteristics of its own material, and further prevent the mechanism from deflecting relative to the axis of the installation groove.

[0055] After the rubber tube 18 contacts the inner wall of the installation groove, it will not cause damage to the inner wall structure. After repeated force, the integrity of the inner wall of the installation groove can still be guaranteed, so that the pipe segment will not loosen after being connected for a period of time, which greatly improves the safety of facilities, equipment and personnel inside the pipe segment.

[0056] Example 9: Reference Figure 1-Figure 9 A plurality of rupture grooves 23 are provided on the inner wall of the rubber tube 18 away from the piston disk 21, and the cross section of the rupture groove 23 is an inverted triangle.

[0057] The principles and beneficial effects of the above scheme are:

[0058] Since the cross-section of the rupture groove 23 is an inverted triangle, when the friction force applied to the rubber tube 18 is too large, that is, when the tube segment is subjected to a great external force and a dangerous situation occurs, the bottom of the rupture groove 23 cracks and then the outer wall of the rubber tube 18 ruptures. After the adhesive in the rubber tube 18 flows into the installation groove, the cracks in the installation groove caused by stress deformation are first sealed, which improves the waterproof and anti-penetration capabilities while preventing secondary damage to the installation groove. At the same time, the injected adhesive can reduce the stress in the installation groove and evenly distribute the stress. Further, the mechanism can be used to increase the strength of the mechanical connection with the installation groove.

[0059] Example 10: Reference Figure 1-Figure 9 The end portions of a plurality of guide pieces 24 are connected to the side wall of the telescopic tube 3 , and the bottom wall of the rupture groove 23 is arranged toward the guide piece 24 .

[0060] The principles and beneficial effects of the above scheme are:

[0061] After the rupture groove 23 is ruptured, if the stress change on the rubber tube 18 is small, the volume of the adhesive flowing out is small. At this time, the adhesive can be initially guided by the guide sheet 24 and the flow direction of the adhesive can be restricted to implement the bonding of the mounting groove and the rubber tube 18 with the adhesive, while the remaining adhesive can seal the generated crack again. When the rubber tube 18 is stressed again, the adhesive can be discharged again through the bonded rupture groove 23; if the stress change on the rubber tube 18 is large, the rupture groove 23 is completely ruptured and the adhesive can implement the complete bonding of the mechanism and the mounting groove.

[0062] After the adhesive flowing out from the outer wall of the rubber tube 18 is guided by the guide piece 24, the diffusion area of ​​the adhesive is increased, and the adhesive can then bond the mechanism to the inner wall of the mounting groove.

[0063] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An adjustable segment connector, characterized in that: include: An outer tube (1), an inner tube (2), a telescopic tube (3), a slide groove (4) and a slider (5), wherein the outer tube (1) is rotatably connected to the inner tube (2), a locking piece (6) is connected to the inner tube (2), and an end of the locking piece (6) is arranged away from the outer tube (1), both ends of the inner wall of the outer tube (1) are provided with a threaded portion, and both ends of the inner tube (2) are provided with a slide groove (4), the slide groove (4) is slidably connected to the slider (5), the slider (5) is installed on the inner wall of the end of the telescopic tube (3), the thread of the end of the telescopic tube (3) is threadedly connected to the threaded portion, and the other end of the telescopic tube (3) is arranged away from the outer tube (1).

2. The adjustable segment connector according to claim 1, characterized in that: The locking member (6) comprises: a notch (9), a second notch (7), a rod (8) and a connecting member. A plurality of second notches (7) are provided through the side of the telescopic tube (3). The second notch (7) is arranged away from the end of the outer tube (1). The second notch (7) and the notch (9) are arranged concentrically. The area of ​​the second notch (7) is larger than that of the notch (9). The notch (9) is provided through the side of the inner tube (2). A rod (8) is longitudinally slidably connected in the notch (9). The rod (8) is placed in the second notch (7). The bottom of the rod (8) is connected to the telescopic tube (3) through the connecting member.

3. The adjustable segment connector according to claim 2, characterized in that: The rod member (8) comprises: a rod body (10), a mounting plate (11), a spring (12) and a sleeve (13); the notch (9) is longitudinally slidably connected to the rod body (10); the rod body (10) is placed in the second notch (7); the mounting plate (11) on the rod body (10) is connected to the bottom of the spring (12); the top of the spring (12) is connected to the bottom of the sleeve (13); the jack at the bottom of the sleeve (13) is slidably connected to the top of the rod body (10); a dome is provided at the top of the sleeve (13); the bottom of the rod body (10) is connected to the telescopic tube (3) through a connecting piece; the dome is arranged away from the side wall of the outer tube (1).

4. The adjustable segment connector according to claim 3, characterized in that: The connecting member comprises: a guide block (14), a second guide block (15), a connecting rod (16) and a pressure plate (17); the bottom of the rod body (10) is connected to the top of the guide block (14); the bottom of the guide block (14) is provided with an inclined surface, the inclined surface is arranged toward the inner tube (2), the inclined surface is slidably matched with the second inclined surface, the second inclined surface is arranged on the top of the second guide block (15); the side of the second guide block (15) is connected to the end of the connecting rod (16); the other end of the connecting rod (16) is connected to the pressure plate (17), and the pressure plate (17) is connected to the inner wall of the telescopic tube (3).

5. The adjustable segment connector according to claim 4, characterized in that: The other end of the telescopic tube (3) is connected to a rubber tube (18).

6. The adjustable segment connector according to claim 4, characterized in that: A through hole is opened in the middle of the pressure plate (17), and the through hole is slidably sealed with the connecting rod (19). One end of the connecting rod (19) is connected to the bearing plate (20), and the bearing plate (20) is connected to the inner wall of the inner tube (2).

7. The adjustable segment connector according to claim 6, characterized in that: The other end of the connecting rod (19) is connected to the piston disc (21), and the piston disc (21) is slidably sealed with the inner wall of the telescopic tube (3). A pressure chamber is formed between the inner wall of the telescopic tube (3), the pressure disc (17) and the piston disc (21). The inner wall of the pressure chamber is provided with a liquid injection hole, and a one-way valve is arranged in the liquid injection hole. Adhesive is injected into the pressure chamber.

8. The adjustable segment connector according to claim 7, characterized in that: The piston plate (21) is connected to a plurality of flow guide tubes (22), one end of the flow guide tube (22) is placed in the pressure chamber, the second through hole on the rubber tube (18) is slidably sealed with the flow guide tube (22), and the other end of the flow guide tube (22) is placed in the rubber tube (18).

9. The adjustable segment connector according to claim 8, characterized in that: A plurality of rupture grooves (23) are provided on the inner wall of the rubber tube (18) away from the piston disc (21), and the cross section of the rupture grooves (23) is an inverted triangle.

10. The adjustable segment connector according to claim 9, characterized in that: The end portions of a plurality of guide pieces (24) are connected to the side wall of the telescopic tube (3), and the bottom wall of the rupture groove (23) is arranged toward the guide piece (24).

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