Remote sensing monitoring device for effect of mine restoration treatment area

Abstract

The utility model provides a remote sensing monitoring device for the effect of a mine remediation treatment area. The remote sensing monitoring device for the effect of the mine remediation treatment area comprises a base plate, a vertical rod, a lantern ring, a fixing piece and a pull rope. According to the remote sensing monitoring device for the effect of the mine repair treatment area, the base plate is arranged, the fixing holes are formed in the base plate, when the base plate is installed, bolts can be pre-buried on the ground according to the positions of the fixing holes, and then the base plate is fixed to the ground through nuts. According to the application, the lantern ring is slidably arranged on the outer side of the vertical rod, the height of the lantern ring can be freely adjusted, the fixing part is in threaded connection with the outer side wall of the lantern ring, and the pull rope is mounted on the outer side of the fixing part, so that after the vertical rod is fixed to the ground, the pull rope can be fixed to the periphery of the vertical rod according to the terrain of a site; and the pull rope can play a role in pulling and supporting. And the pull ropes are arranged on the peripheries of the vertical rods, so that the mounting stability of the vertical rods can be further ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine environment restoration monitoring, and particularly relates to a remote sensing monitoring device for the effect of a mine restoration and treatment area. Background Art

[0002] The remote sensing survey of surface matrix mainly depends on the tone characteristics, texture characteristics, surface conditions, geomorphic characteristics, water system characteristics and spectral characteristics of the remote sensing images of the soil. By dividing the interpretable degree area, three methods, namely the direct interpretation method, the comparison method and the neighborhood method, are adopted to complete the remote sensing interpretation of the surface matrix in a man-machine interactive interpretation mode. At present, during the mine treatment process, remote sensing monitoring technology is usually used to monitor the environment around the mine. It is necessary to install the remote sensing monitoring device on site. Currently, the monitoring device is usually installed on a bracket and the bracket is fixed on site. However, the mine geology is relatively complex, and the fixation of the monitoring device cannot be ensured only by the fixation at the bottom end of the bracket, which affects the normal use of the later monitoring equipment. Summary of the Utility Model

[0003] An embodiment of the utility model provides a remote sensing monitoring device for the effect of a mine restoration and treatment area, aiming to solve the problem that the stability of the existing mine remote sensing monitoring device is poor during the fixation process, which affects the normal use of the later monitoring equipment.

[0004] To achieve the above object, the technical solution adopted by the utility model is: to provide a remote sensing monitoring device for the effect of a mine restoration and treatment area, including:

[0005] A chassis, on which a plurality of fixing holes for fixing to the ground are provided;

[0006] A vertical rod, fixedly installed on the chassis in the vertical direction, and a monitoring device is installed at the top of the vertical rod;

[0007] A collar, sleeved on the outside of the vertical rod, and the collar is slidably arranged in the vertical direction on the outside of the vertical rod;

[0008] A plurality of fixing members, which are arranged around the outside of the collar, are threadedly connected to the collar and penetrate through the collar, and the end of the fixing member can abut against the vertical rod for fixing the collar to the vertical rod;

[0009] A pull rope, one end of which is fixedly installed on the fixing member, and the other end is used for fixing to the ground.

[0010] In a possible implementation manner, an installation ring for installing the pull rope is fixedly installed at the end of the fixing member, one end of the pull rope passes through the inside of the installation ring, and a rope buckle is further arranged on the pull rope.

[0011] In a possible implementation, the rope buckle includes:

[0012] A fixing plate;

[0013] A U-shaped member, both ends of which penetrate through the fixing plate, and an installation gap for installing the pulling rope is formed between the U-shaped member and the fixing plate;

[0014] A fastener, which is threadedly connected to the end of the U-shaped member and abuts against the fixing plate, and is used to fix the pulling rope inside the installation gap.

[0015] In a possible implementation, a fixing rod is fixedly installed at one end of the pulling rope away from the fixing member, and the fixing rod includes a connecting portion for connecting the pulling rope and a fixing portion for fixing to the ground.

[0016] In a possible implementation, the connecting portion includes:

[0017] A connecting rod, which is fixedly connected to the fixing portion;

[0018] An L-shaped plate, one side wing plate of which is fixedly installed on the connecting rod, and the other side wing plate extends towards the fixing portion;

[0019] A fastening bolt, which is threadedly connected to the connecting rod, and the fastening bolt is used to limit the pulling rope inside the L-shaped plate.

[0020] In a possible implementation, the fixing portion includes:

[0021] A fixing tube, a plurality of elastic pieces are installed at the bottom of the fixing tube, the plurality of elastic pieces are evenly spaced along the circumferential direction of the fixing tube, the outer side wall of the elastic piece is flush with the fixing tube, and the thickness of the elastic piece gradually increases from top to bottom;

[0022] A top rod, which is threadedly connected to the fixing tube and abuts against the inner wall of the elastic piece.

[0023] In a possible implementation, the vertical rod includes a bottom tube for fixing to the chassis and a top tube slidably arranged inside the bottom tube, the monitoring device is installed on the top tube, and a fixing component for fixing the top tube inside the bottom tube is arranged between the bottom tube and the top tube.

[0024] In a possible implementation, the fixing component includes:

[0025] A sleeve, which is fixedly installed at the top end of the bottom tube and is coaxially arranged with the bottom tube, and the sleeve is sleeved outside the top tube;

[0026] The expansion ring is installed inside the casing. The outer sidewall of the expansion ring abuts against the inner wall of the casing, and the jacking pipe is located inside the expansion ring;

[0027] The extrusion sleeve is threadedly connected to the casing and can abut against the expansion ring for extruding the expansion ring to deform so that the expansion ring presses against the outer sidewall of the jacking pipe.

[0028] The solution shown in the embodiment of the present application, compared with the prior art, by providing a chassis with a plurality of fixing holes provided on the chassis, and the plurality of fixing holes are uniformly arranged on the outer side of the vertical rod. When installing the chassis, bolts can be embedded in the ground according to the positions of the fixing holes, and the bolts are inserted into the fixing holes, and then nuts are used to fix the chassis to the ground. In the present application, by slidably arranging a collar on the outer side of the vertical rod, the height of the collar can be freely adjusted, and a fixing member is threadedly connected to the outer sidewall of the collar, and a pull rope is installed on the outer side of the fixing member. After the vertical rod is fixed to the ground, the pull rope can be fixed around the vertical rod according to the terrain of the site, so that the pull rope can play a role of pulling and supporting. At the same time, the height of the collar can be freely adjusted, and the position of the collar can be effectively adjusted in combination with the topography of the site to ensure that the pull rope can play an effective pulling role. Pull ropes are arranged around the circumference of the vertical rod, which can further ensure the stability of the installation of the vertical rod. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of a remote sensing monitoring device for the effect of a mine restoration and treatment area provided by an embodiment of the present invention;

[0030] Figure 2 It is a schematic installation structure diagram of a collar provided by an embodiment of the present invention;

[0031] Figure 3 It is a schematic structural diagram of a rope buckle provided by an embodiment of the present invention;

[0032] Figure 4 It is a schematic structural diagram of a fixing rod provided by an embodiment of the present invention;

[0033] Figure 5 It is an exploded structural diagram of a fixing component provided by an embodiment of the present invention.

[0034] Description of the Reference Numerals:

[0035] 1. Chassis; 2. Vertical rod; 21. Bottom pipe; 22. Top pipe; 3. Monitoring device; 4. Collar; 5. Fixing member; 51. Installation ring; 6. Pulling rope; 61. Rope buckle; 611. Fixing plate; 612. U-shaped member; 613. Fastening member; 7. Fixed rod; 71. Connecting portion; 711. Connecting rod; 712. L-shaped plate; 713. Fastening bolt; 72. Fixed portion; 721. Fixed pipe; 722. Elastic piece; 8. Fixing assembly; 81. Sleeve; 82. Expansion ring; 83. Extrusion sleeve. Detailed implementation manner

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0037] Please refer to Figures 1 to 5 simultaneously, and a remote sensing monitoring device for the effect of a mine restoration and treatment area provided by the present utility model will be described. The remote sensing monitoring device for the effect of the mine restoration and treatment area includes a chassis 1, a vertical rod 2, a collar 4, a fixing member 5 and a pulling rope 6. A plurality of fixing holes for fixing to the ground are provided on the chassis 1; the vertical rod 2 is fixedly installed on the chassis 1 along the vertical direction, and a monitoring device 3 is installed at the top of the vertical rod 2; the collar 4 is sleeved outside the vertical rod 2, and the collar 4 is slidably arranged outside the vertical rod 2 along the vertical direction; the number of the fixing members 5 is multiple, and the multiple fixing members 5 are arranged around the outside of the collar 4, the fixing member 5 is threadedly connected with the collar 4 and penetrates through the collar 4, and the end of the fixing member 5 can abut against the vertical rod 2 to fix the collar 4 to the vertical rod 2; one end of the pulling rope 6 is fixedly installed on the fixing member 5, and the other end is used for fixing to the ground.

[0038] Compared with the prior art, the remote sensing monitoring device for the effect of the mine restoration and treatment area provided in this embodiment is provided with a chassis 1, and a plurality of fixing holes are provided on the chassis 1. The plurality of fixing holes are uniformly arranged outside the vertical rod 2. When installing the chassis 1, bolts can be embedded in the ground according to the positions of the fixing holes, and the bolts are inserted into the fixing holes, and then the chassis 1 is fixed to the ground by using nuts. In this application, a collar 4 is slidably arranged outside the vertical rod 2, the height of the collar 4 can be freely adjusted, and a fixing member 5 is threadedly connected to the outer side wall of the collar 4, and a pulling rope 6 is installed on the outer side of the fixing member 5. After the vertical rod 2 is fixed to the ground, the pulling rope 6 can be fixed around the vertical rod 2 according to the terrain of the site, so that the pulling rope 6 can play a role of pulling and supporting. At the same time, the height of the collar 4 can be freely adjusted, and the position of the collar 4 can be adjusted effectively in combination with the landform of the site to ensure that the pulling rope 6 can play an effective pulling role. The pulling ropes 6 are arranged around the circumference of the vertical rod 2, which can further ensure the stability of the installation of the vertical rod 2.

[0039] Preferably, in this embodiment, a plurality of pits for accommodating the end portions of the fixing members 5 are recessed on the outer sidewall of the vertical rod 2, and the plurality of pits are arranged on the vertical rod 2 at intervals along the length direction of the vertical rod 2. The end portions of the fixing members 5 can slide into the pits to ensure the installation position of the sleeve 81.

[0040] Specifically, in this embodiment, the monitoring device 3 is a prior art and will not be elaborated herein. The housing of the monitoring device 3 is installed on the vertical rod 2, and the installation structure adopts the prior art and will not be elaborated herein.

[0041] In some embodiments, the above-mentioned pull rope 6 can adopt structures such as Figure 1 , Figure 2 and Figure 3 as shown. Referring to Figure 1 , Figure 2 and Figure 3 collectively, an installation ring 51 for installing the pull rope 6 is fixedly installed at the end portion of the fixing member 5. One end of the pull rope 6 passes through the inside of the installation ring 51 and a rope buckle 61 is also provided on the pull rope 6. One end of the pull rope 6 passes through the inside of the installation ring 51 and the end portion of the pull rope 6 is fixed to the middle of the rope by the rope buckle 61, which can fix the pull rope 6 to the fixing member 5. At the same time, the length of the pull rope 6 can be adjusted to keep the pull rope 6 under a certain tension and ensure the stability of the installation of the vertical rod 2.

[0042] In some embodiments, the above-mentioned rope buckle 61 can adopt structures such as Figure 2 , Figure 3 as shown. Referring to Figure 2 , Figure 3 collectively, the rope buckle 61 includes a fixing plate 611, a U-shaped member 612 and a fastening member 613. The two ends of the U-shaped member 612 penetrate through the fixing plate 611, and an installation gap for installing the pull rope 6 is formed between the U-shaped member 612 and the fixing plate 611; the fastening member 613 is threadedly connected to the end portion of the U-shaped member 612, and the fastening member 613 abuts against the fixing plate 611 to fix the pull rope 6 inside the installation gap. The U-shaped member 612 is formed by bending a steel rod, and a groove for accommodating the pull rope 6 is bent on the fixing plate 611. The fastening member 613 is a nut, and by tightening the fastening member 613, the U-shaped member 612 can press the pull rope 6 against the fixing plate 611, so that the end portion of the pull rope 6 can be fixed to the middle of the pull rope 6.

[0043] Specifically, in this embodiment, both the middle and the end of the pull rope 6 are located between the U-shaped member 612 and the fixing plate 611.

[0044] In some embodiments, the above-mentioned pull rope 6 can adopt structures such as Figure 1 , Figure 4 as shown. Referring to Figure 1 , Figure 4, a fixing rod 7 is fixedly installed at one end of the pulling rope 6 far away from the fixing member 5. The fixing rod 7 includes a connecting portion 71 for connecting the pulling rope 6 and a fixing portion 72 for fixing to the ground. By installing the fixing rod 7 at one end of the pulling rope 6 and fixing the fixing portion 72 of the fixing rod 7 to the installation hole, it is convenient to process the installation hole for installing the fixing portion 72 on the ground or rock, which facilitates the stability of the fixation of the other end of the pulling rope 6.

[0045] In some embodiments, the above-mentioned connecting portion 71 may adopt a structure as Figure 4 shown. Refer to Figure 4 , the connecting portion 71 includes a connecting rod 711, an L-shaped plate 712 and a fastening bolt 713. The connecting rod 711 is fixedly connected to the fixing portion 72; one side wing plate of the L-shaped plate 712 is fixedly installed on the connecting rod 711, and the other side wing plate extends towards the direction close to the fixing portion 72; the fastening bolt 713 is threadedly connected to the connecting rod 711, and the fastening bolt 713 is used to limit the pulling rope 6 inside the L-shaped plate 712. The L-shaped plate 712 is fixedly installed in the middle of the connecting rod 711, and the end of the pulling rope 6 is in a ring structure, and the end of the pulling rope 6 is sleeved inside the L-shaped plate 712. The fastening bolt 713 is threadedly connected to the connecting rod 711, and by rotating the fastening bolt 713 to adjust the position of the fastening bolt 713 so that the fastening thread is located at the mouth of the gap between the L-shaped plate 712 and the connecting rod 711, the pulling rope 6 can be limited between the L-shaped plate 712 and the connecting rod 711 to prevent the pulling rope 6 from slipping out of the inside of the L-shaped plate 712.

[0046] Specifically, in this embodiment, the fastening bolt 713 can abut against the outer side wall of the pulling rope 6, so as to squeeze the pulling rope 6 against one side wing plate where the L-shaped plate 712 is connected to the connecting rod 711, ensuring the stability of the fixation of the pulling rope 6.

[0047] Specifically, in this embodiment, the two wing plates on the L-shaped plate 712 are perpendicularly arranged.

[0048] In some embodiments, the above-mentioned fixing portion 72 may adopt a structure as Figure 4 shown. Refer to Figure 4, the fixing part 72 includes a fixing pipe 721 and a push rod. A plurality of elastic pieces 722 are installed at the bottom of the fixing pipe 721. The plurality of elastic pieces 722 are evenly arranged at intervals along the circumferential direction of the fixing pipe 721. The outer side wall of the elastic piece 722 is flush with the fixing pipe 721, and the thickness of the elastic piece 722 gradually increases from top to bottom; the push rod is threadedly connected to the fixing pipe 721 and abuts against the inner wall of the elastic piece 722. The fixing pipe 721 is threadedly connected to the connecting rod 711, and a through hole for installing the push rod is provided inside the connecting rod 711. One end of the push rod is located inside the connecting rod 711. By rotating the push rod, the end of the push rod abuts against the inner wall of the elastic piece 722. The inner wall of the elastic piece is inclined from top to bottom towards the axis of the fixing pipe, so as to push the elastic piece 722 to expand outwards. The elastic piece 722 is abutted against the inner wall of the installation hole for installing the fixing pipe 721, so as to fix the fixing pipe 721 inside the installation hole.

[0049] Specifically, in this embodiment, by processing an installation hole for installing the fixing pipe 721 on the on-site ground or rock, then putting the fixing pipe 721 into the installation hole, using a tool to pass through the connecting rod 711 and the fixing pipe 721 to rotate the push rod, and moving the push rod downward to drive the elastic piece 722 to expand outwards, so as to fix the fixing pipe 721 inside the installation hole. The structure is simple and it is convenient to fix the fixing rod 7 on-site.

[0050] Preferably, in this embodiment, in the free state, when the push rod does not abut against the elastic piece 722, the fixing pipe 721 can slide into the fixing hole of the chassis 1, so that the fixing pipe 721 can be installed on the chassis 1, which is convenient for the operator to carry the monitoring device to the installation position.

[0051] Specifically, in this embodiment, the connecting rod 711 and the fixing pipe 721 are of an integrally formed structure.

[0052] In some embodiments, the above-mentioned vertical rod 2 can adopt a structure such as Figure 1 , Figure 5 shown. Referring to Figure 1 , Figure 5 together, the vertical rod 2 includes a bottom pipe 21 for fixing to the chassis 1 and a top pipe 22 slidably arranged inside the bottom pipe 21. The monitoring device 3 is installed on the top pipe 22, and a fixing component 8 for fixing the top pipe 22 inside the bottom pipe 21 is arranged between the bottom pipe 21 and the top pipe 22. The vertical rod 2 includes a bottom pipe 21 and a top pipe 22. The top pipe 22 is slidably arranged inside the bottom pipe 21. A cross bar for installing the monitoring device 3 is fixedly installed on the top pipe 22, and a variety of monitoring devices 3 can be installed. The end of the bottom pipe 21 is fixedly installed on the chassis 1 by welding. And by adjusting the position of the top pipe 22 inside the bottom pipe 21 to adjust the height of the monitoring device 3, so that the monitoring device 3 can be applicable to the on-site monitoring working conditions.

[0053] Preferably, in this embodiment, the jacking pipe 22 is rotatably arranged inside the bottom pipe 21, so that the monitoring angle of the monitoring device 3 can be adjusted.

[0054] In some embodiments, the above-mentioned fixing component 8 can adopt the structure as shown in Figure 1 , Figure 5 . Referring to Figure 1 , Figure 5 together, the fixing component 8 includes a sleeve 81, an expansion ring 82 and an extrusion sleeve 83. The sleeve 81 is fixedly installed at the top end of the bottom pipe 21 and is coaxially arranged with the bottom pipe 21. The sleeve 81 is sleeved outside the jacking pipe 22; the expansion ring 82 is installed inside the sleeve 81. The outer wall of the expansion ring 82 abuts against the inner wall of the sleeve 81, and the jacking pipe 22 is located inside the expansion ring 82; the extrusion sleeve 83 is threadedly connected with the sleeve 81 and can abut against the expansion ring 82 for extruding the expansion ring 82 to deform so that the expansion ring 82 is extruded against the outer wall of the jacking pipe 22. A flange is fixedly installed at the top of the bottom pipe 21, the sleeve 81 is fixedly installed on the flange, and the expansion ring 82 is installed inside the sleeve 81. By rotating the extrusion sleeve 83, the end of the extrusion sleeve 83 can abut against the expansion ring 82, causing the expansion ring 82 to deform and the inner hole to become smaller, so that the expansion ring 82 is extruded onto the jacking pipe 22, fixing the jacking pipe 22 inside the bottom pipe 21.

[0055] Preferably, in this embodiment, a plurality of gasket rings are also slidably arranged inside the sleeve 81. The number of expansion rings 82 is multiple, and the expansion rings 82 are located between two gasket rings. The end of the extrusion sleeve 83 abuts against the end face of the gasket ring. It can improve the connection stability between the bottom pipe 21 and the jacking pipe 22. By facilitating the rotation of the extrusion sleeve 83 to compress the expansion ring 82.

[0056] Specifically, in this embodiment, the expansion ring 82 is made of polyurethane.

[0057] Specifically, in this embodiment, a rotating part is fixedly installed at the end of the extrusion sleeve 83. The rotating part is located outside the bottom pipe 21, so as to facilitate the use of tools to rotate the extrusion sleeve 83.

[0058] Specifically, in this embodiment, a limiting platform for installing the expansion ring 82 is arranged inside the sleeve 81, and the extrusion sleeve 83 is used to extrude the expansion ring 82 onto the limiting platform.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A remote sensing monitoring device for the effect of mine restoration and management area, characterized in that: include: A chassis (1), wherein the chassis (1) is provided with a plurality of fixing holes for fixing to the ground; A vertical pole (2) is fixedly mounted on the chassis (1) in a vertical direction, and a monitoring device (3) is mounted on the top of the vertical pole (2); A collar (4) is sleeved on the outside of the upright pole (2), and the collar (4) is slidably arranged on the outside of the upright pole (2) in a vertical direction; A plurality of fixing members (5), the plurality of fixing members (5) being arranged around the outer side of the collar (4), the fixing members (5) being threadedly connected to the collar (4) and being arranged through the collar (4), the ends of the fixing members (5) being able to abut against the upright pole (2) to fix the collar (4) to the upright pole (2); A pull rope (6) has one end fixedly mounted on the fixing member (5) and the other end used for fixing to the ground.

2. The remote sensing monitoring device for the effect of mine restoration and management area according to claim 1 is characterized in that: A mounting ring (51) for mounting the pull rope (6) is fixedly mounted on the end of the fixing member (5); one end of the pull rope (6) is inserted into the mounting ring (51) and a rope buckle (61) is also provided on the pull rope (6).

3. The remote sensing monitoring device for the effect of mine restoration and management area according to claim 2 is characterized in that: The rope buckle (61) comprises: Fixed plate (611); A U-shaped member (612) with two ends penetrating the fixing plate (611), and a mounting gap for mounting the pull rope (6) is formed between the U-shaped member (612) and the fixing plate (611); A fastener (613) is threadedly connected to the end of the U-shaped member (612), and the fastener (613) abuts against the fixing plate (611) to fix the pull rope (6) inside the installation gap.

4. The remote sensing monitoring device for the effect of mine restoration and treatment area according to claim 1 is characterized in that: A fixing rod (7) is fixedly mounted on one end of the pull rope (6) away from the fixing member (5), and the fixing rod (7) comprises a connecting portion (71) for connecting the pull rope (6) and a fixing portion (72) for fixing to the ground.

5. The remote sensing monitoring device for the effect of mine restoration and treatment area according to claim 4 is characterized in that: The connecting portion (71) comprises: A connecting rod (711) fixedly connected to the fixing portion (72); An L-shaped plate (712), one side wing plate being fixedly mounted on the connecting rod (711), and the other side wing plate being extended in a direction close to the fixing portion (72); A fastening bolt (713) is threadedly connected to the connecting rod (711), and the fastening bolt (713) is used to limit the pull rope (6) inside the L-shaped plate (712).

6. The remote sensing monitoring device for the effect of mine restoration and treatment area according to claim 5 is characterized in that: The fixing portion (72) comprises: A fixed tube (721), wherein a plurality of elastic sheets (722) are installed at the bottom of the fixed tube (721), the plurality of elastic sheets (722) are evenly spaced along the circumference of the fixed tube (721), the outer side walls of the elastic sheets (722) are flush with the fixed tube (721), and the thickness of the elastic sheets (722) gradually increases from top to bottom; The push rod is threadably connected to the fixing tube (721) and abuts against the inner wall of the elastic sheet (722).

7. The remote sensing monitoring device for the effect of mine restoration and treatment area according to claim 1 is characterized in that: The upright pole (2) comprises a bottom tube (21) for fixing to the bottom plate (1) and a top tube (22) slidably arranged inside the bottom tube (21); the monitoring device (3) is mounted on the top tube (22); and a fixing assembly (8) for fixing the top tube (22) to the inside of the bottom tube (21) is arranged between the bottom tube (21) and the top tube (22).

8. The remote sensing monitoring device for the effect of mine restoration and treatment area according to claim 7, characterized in that: The fixing assembly (8) comprises: A sleeve (81) is fixedly mounted on the top of the bottom tube (21) and is coaxially arranged with the bottom tube (21), and the sleeve (81) is sleeved on the outside of the top tube (22); An expansion ring (82) is installed inside the sleeve (81), the outer wall of the expansion ring (82) abuts against the inner wall of the sleeve (81), and the top tube (22) is located inside the expansion ring (82); The extrusion sleeve (83) is threadedly connected to the sleeve (81) and can be pressed against the expansion ring (82) to squeeze the expansion ring (82) to deform it so that the expansion ring (82) is pressed against the outer wall of the top tube (22).

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