Double-spliced centering device and anchor rod supporting system

Abstract

The utility model relates to a double-splicing type centering device and an anchor rod supporting system, and belongs to the technical field of engineering structure supporting appliances, the centering device comprises a first semi-circular pipe and a first semi-circular plate, the first semi-circular plate is arranged on the outer wall of the first semi-circular pipe and is coaxial with the first semi-circular pipe, a fixing block is arranged on the outer wall of the first semi-circular pipe, and a second semi-circular plate is arranged on the outer wall of the first semi-circular pipe. The fixed block is provided with a locking part; the second semicircular plate is arranged on the outer wall of the second semicircular pipe and is coaxial with the second semicircular pipe, and a belt loop is arranged on the outer wall of the second semicircular pipe; one end of the flexible belt body is fixedly connected to the fixing block, the other end of the flexible belt body is provided with a lock catch, the flexible belt body movably penetrates through the belt loop, and the outer diameter of the lock catch is larger than the caliber of the belt loop. The anchor rod supporting system comprises the double-spliced centering device.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering structure support tools, and particularly relates to a double-jointed centering device and an anchor support system. Background Art

[0002] At present, the anchor support system mainly includes an anchor rod body, a tray, a nut and a centering device, wherein the anchor rod body is inserted into the anchor hole opened in the rock mass and fixed in the anchor hole by means of resin, slurry, expansion shell and the like. The tray is provided with a center hole, the anchor rod body is passed through the center hole of the tray, and the nut is screwed to the anchor rod body. The nut is used to press the tray against the rock wall of the rock mass, and the centering device is sleeved on the middle part of the anchor rod body so that the anchor rod body is centered in the anchor hole to prevent the rod body from being tightly attached to the wall of the anchor hole.

[0003] A double-piece centerer is a type of existing centerer, which is usually composed of two semicircular components on the left and right. Before assembly, the two semicircular components on the left and right are completely separate. During construction, the left and right halves of the components need to be used in conjunction with each other. However, the left and right halves of the current double-piece centerer are not coded and numbered, so at the construction site, construction workers need to spend a certain amount of time and energy to pair them. Utility Model Content

[0004] The utility model provides a double-jointed centering device, which is used to solve the above technical problems pointed out in the background technology.

[0005] The utility model is realized by the following technical solution: a double-jointed centering device, comprising:

[0006] A first semicircular tube and a first semicircular plate, wherein the first semicircular plate is arranged on the outer wall of the first semicircular tube and is coaxial with the first semicircular tube, a fixing block is arranged on the outer wall of the first semicircular tube, and the fixing block is provided with a locking portion;

[0007] a second semicircular tube and a second semicircular plate, wherein the second semicircular plate is arranged on the outer wall of the second semicircular tube and is coaxial with the second semicircular tube, and a belt loop is arranged on the outer wall of the second semicircular tube;

[0008] A flexible belt body, one end of which is fixedly connected to the fixed block, and the other end of which is provided with a lock buckle, wherein the flexible belt body is movably connected to the belt loop, and the outer diameter of the lock buckle is larger than the diameter of the belt loop;

[0009] In a first state, the first semicircular tube and the second semicircular tube are spliced ​​together to form a circular tube, the first semicircular plate and the second semicircular plate are spliced ​​together to form a circular plate, the locking buckle is connected to the locking portion, and the flexible belt tightly binds the circular tube;

[0010] In the second state, the lock buckle is not connected to the locking portion, and the first semicircular tube and the second semicircular tube are connected by the flexible belt.

[0011] Furthermore, in order to better implement the present invention, the lock buckle includes a wedge-shaped block, the wedge-shaped block having a pointed end and a tail end opposite to the pointed end, the wedge-shaped block also having an inclined surface located between the pointed end and the tail end, and a positioning hole is opened on the inclined surface;

[0012] The locking portion includes a spring and a lock head adapted to the positioning hole. A lock hole is provided on the fixing block, and a mounting hole is provided on the hole wall of the lock hole. The lock head is slidably inserted into the mounting hole. The spring is placed in the mounting hole, and both ends of the spring abut against the lock head and the bottom of the mounting hole respectively.

[0013] When the wedge-shaped block is inserted into the lock hole, the inclined surface cooperates with the lock head, so that the lock head overcomes the elastic force of the spring and slides into the mounting hole;

[0014] When the wedge-shaped block is inserted until the lock head corresponds to the lock hole, the lock head is inserted into the positioning hole under the elastic force of the spring, so that the lock buckle is locked with the locking portion.

[0015] Furthermore, in order to better implement the present invention, the flexible belt body is a flexible steel belt, one end of the flexible steel belt body is welded to the fixed block, and the other end of the flexible belt body is welded to the wedge block.

[0016] Furthermore, in order to better implement the present invention, a first arc-shaped groove and a second arc-shaped groove are respectively provided on the inner walls of the first semicircular tube and the second semicircular tube;

[0017] When the first semicircular tube and the second semicircular tube are spliced ​​together to form the circular tube, the first arcuate groove and the second arcuate groove are spliced ​​together to form an internal thread on the inner wall of the circular tube, and the internal thread is adapted to the external thread on the outer wall of the anchor rod.

[0018] Furthermore, in order to better implement the present invention, both the first semicircular plate and the second semicircular plate are provided with weight-reducing notches.

[0019] Furthermore, in order to better implement the present invention, the first semicircular plate is arranged in the middle of the first semicircular tube, and the number of the fixing blocks is two, and the two fixing blocks are symmetrically arranged on both sides of the first semicircular plate;

[0020] The second semicircular plate is arranged in the middle of the second semicircular tube, and the number of the belt loops is two, and the two belt loops are symmetrically arranged on both sides of the second semicircular plate;

[0021] There are two flexible belts, and the two flexible belts correspond one to one with the two fixing blocks and the two belt loops.

[0022] Furthermore, in order to better implement the present invention, a first reinforcing rib is provided between the first semicircular tube and the first semicircular plate;

[0023] A second reinforcing rib is provided between the second semicircular tube and the second semicircular plate.

[0024] The anchor support system provided by the utility model includes:

[0025] Anchor rod body;

[0026] An anchor head, mounted on one end of the anchor rod body;

[0027] A tray is sleeved on the anchor rod body;

[0028] A nut, screwed to the anchor rod body, wherein the nut and the anchor head are respectively located on two sides of the tray;

[0029] The above-mentioned double-jointed centralizer, the circular tube composed of the first semicircular tube and the second semicircular tube is sleeved on the middle part of the anchor rod body and is tied by the flexible belt body, and the double-jointed centralizer is located between the tray and the anchor head.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The double-jointed centering device provided by the present invention comprises a first semicircular tube, a first semicircular plate, a second semicircular tube, a second semicircular plate and a flexible belt body, wherein the first semicircular plate is arranged on the outer wall of the first semicircular tube and is coaxial with the first semicircular tube, a fixed block is arranged on the outer wall of the first semicircular tube, the fixed block is provided with a locking portion, the second semicircular plate is arranged on the outer wall of the second semicircular tube and is coaxial with the second semicircular tube, a belt loop is arranged on the outer wall of the second semicircular tube, one end of the flexible belt body is fixedly connected to the fixed block, and the other end is provided with a lock buckle, the flexible belt body is movably connected to the belt loop, and the outer diameter of the lock buckle is larger than the diameter of the belt loop. In the first state, the first semicircular tube and the second semicircular tube are joined to form a circular tube, the first semicircular plate and the second semicircular plate are joined to form a circular plate, the lock buckle is connected to the locking portion, and the flexible belt body tightly binds the circular tube; in the second state, the lock buckle is not connected to the locking portion, and the first semicircular tube and the second semicircular tube are connected by the flexible belt body.

[0032] When installed on the anchor rod body, the first semicircular tube and the second semicircular tube are put outside the anchor rod body, so that the anchor rod body is placed in the circular tube composed of the first semicircular tube and the second semicircular tube, and then the flexible belt body is pulled up and the lock buckle at the other end of the flexible belt body is connected to the above-mentioned locking part. At this time, the flexible belt body ties the above-mentioned circular tube tightly to the anchor rod body, thereby installing the double-spliced ​​centering device on the anchor rod body.

[0033] When it does not need to be installed on the anchor rod body, the lock buckle and the locking part are not connected, because one end of the flexible belt body is fixedly connected to the fixed block on the first semicircular tube, the flexible belt body is passed through the belt loop on the second semicircular tube, and the other end of the flexible belt body is provided with a lock buckle whose size is larger than the belt loop diameter. In this way, the flexible belt body cannot come out of the belt loop, and with the help of the flexible belt body, the component composed of the second semicircular tube and the second semicircular plate is connected to the component composed of the first semicircular tube and the first semicircular plate.

[0034] Through the above structure, the double-piece type centerer provided by the utility model uses a flexible belt to connect the two halves of the component when not in use, so that the two halves of the component will not be separated. Therefore, when used on the construction site, construction workers do not need to spend time and energy to pair the double-piece type centerer. When in use, the lock buckle is connected to the locking part, and the double-piece type centerer can be installed on the anchor rod body. It has a simple structure, is easy to use, and is highly practical.

[0035] (2) The anchor support system provided by the present invention uses the above-mentioned double-type centering device. Therefore, during the support process, construction workers do not need to spend time and energy to pair the double-type centering devices, saving the construction workers' time and energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a structural diagram of a double-jointed centering device provided in Example 1 of the present utility model;

[0038] Figure 2 yes Figure 1 Another perspective view of the double-piece centering device shown;

[0039] Figure 3 This is a schematic structural diagram of the first semicircular component in Example 1 of the present utility model;

[0040] Figure 4 yes Figure 3Another perspective view of the first semicircular member shown;

[0041] Figure 5 This is a schematic structural diagram of the second semicircular member in Example 1 of the present utility model;

[0042] Figure 6 yes Figure 5 Another perspective view of the second semicircular member shown;

[0043] Figure 7 Schematic diagram of the structure composed of the flexible belt and the wedge-shaped block in Example 1 of the present utility model;

[0044] Figure 8 This is a schematic diagram of the connection structure between the lock buckle and the locking portion in Example 1 of the present utility model;

[0045] Figure 9 It is a structural diagram of the anchor support system in Example 2 of the present utility model.

[0046] In the picture:

[0047] 100-first semicircular tube, 110-first arc-shaped groove, 200-first semicircular plate, 210-first reinforcing rib, 300-fixing block, 310-spring, 320-locking head, 330-locking hole, 340-mounting hole, 400-second semicircular tube, 410-second arc-shaped groove, 500-second semicircular plate, 520-second reinforcing rib, 600-belt loop, 700-flexible belt body, 710-wedge-shaped block, 711-positioning hole, 800-weight-reducing notch, 910-anchor rod body, 920-anchor head, 930-tray, 940-nut. DETAILED DESCRIPTION

[0048] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0049] Example 1:

[0050] This embodiment provides a double-jointed centering device, such as Figures 1-8 As shown, it includes a first semicircular tube 100, a first semicircular plate 200, a second semicircular tube 400, a second semicircular plate 500 and a flexible belt 700, wherein:

[0051] The first semicircular plate 200 is arranged on the outer wall of the first semicircular tube 100 and is coaxial with the first semicircular tube 100. At this time, the first semicircular plate 200 and the first semicircular tube 100 constitute a first semicircular component. A fixing block 300 is integrally formed on the outer wall of the first semicircular tube 100, and the fixing block 300 is provided with a locking portion.

[0052] The second semicircular plate 500 is disposed on the outer wall of the second semicircular tube 400 and is coaxial with the second semicircular tube 400 . At this time, the second semicircular plate 500 and the second semicircular tube 400 form a second semicircular component. A belt loop 600 is disposed on the outer wall of the second semicircular tube 400 .

[0053] One end of the flexible belt 700 is fixedly connected to the fixed block 300, and the other end is provided with a lock buckle. The flexible belt 700 is movably connected to the belt loop 600, and the outer diameter of the lock buckle is larger than the diameter of the belt loop 600. Specifically, the flexible belt 700 is installed at the manufacturer. During installation, the lock buckle is first connected to the other end of the flexible belt 700, then one end of the lock buckle is passed through the belt loop 600, and finally one end of the lock buckle is fixed to the fixed block 300. In this way, because the outer diameter of the lock buckle is larger than the diameter of the belt loop 600, the lock buckle cannot pass through the belt loop 600. Therefore, the flexible belt 700 and the lock buckle are used to connect the second semicircular tube 400 to be suspended on the first semicircular tube 100, thereby connecting the first and second semicircular components together.

[0054] In the first state, the first semicircular tube 100 and the second semicircular tube 400 are spliced ​​together to form a circular tube, the first semicircular plate 200 and the second semicircular plate 500 are spliced ​​together to form a circular plate, the lock buckle is connected to the locking part, and the flexible belt body 700 tightens the circular tube; in the second state, the lock buckle is not connected to the locking part, and the first semicircular tube 100 and the second semicircular tube 400 are connected by the flexible belt body 700. It should be noted that the first state refers to the state when the double-piece type centralizer is installed on the anchor rod body. Specifically, when installed on the anchor rod body, the first semicircular tube 100 and the second semicircular tube 400 are put outside the anchor rod body, so that the anchor rod body is placed in the circular tube composed of the first semicircular tube 100 and the second semicircular tube 400. Then, the flexible belt body 700 is pulled up and the lock buckle at the other end of the flexible belt body 700 is connected to the above-mentioned locking part. At this time, the flexible belt body 700 ties the above-mentioned circular tube tightly to the anchor rod body, thereby installing the double-piece type centralizer on the anchor rod body.

[0055] In the second state, the lock buckle is not connected to the locking part, and the first semicircular tube 100 and the second semicircular plate 500 are connected by the flexible belt body 700. The second state refers to when the double-piece centering device is installed on the anchor rod body, the lock buckle and the locking part are not connected, because one end of the flexible belt body 700 is fixedly connected to the fixed block 300 on the first semicircular tube 100, and the flexible belt body 700 is passed through the belt loop 600 on the second semicircular tube 400, and the other end of the flexible belt body 700 is provided with a lock buckle whose size is larger than the diameter of the belt loop 600. In this way, the flexible belt body 700 cannot come out of the belt loop 600. With the help of the flexible belt body 700 and the above-mentioned lock buckle, the second semicircular component composed of the second semicircular tube 400 and the second semicircular plate 500 is connected to the first semicircular component composed of the first semicircular tube 100 and the first semicircular plate 200.

[0056] Through the above structure, the double-piece type centralizer provided by the utility model uses a flexible belt body 700 to connect the two halves of the component when not in use, so that the two halves of the component will not be separated. Therefore, when used on the construction site, construction workers do not need to spend time and energy to pair the double-piece type centralizer. When in use, the lock buckle is connected to the locking part, and the double-piece type centralizer can be installed on the anchor rod body. It has a simple structure, is easy to use, and is highly practical.

[0057] An optional implementation of this embodiment is as follows: the above-mentioned lock includes a wedge-shaped block 710, the wedge-shaped block 710 has a pointed end and a tail end opposite to the pointed end, the wedge-shaped block 710 also has an inclined surface located between the pointed end and the tail end, and a positioning hole 711 is provided on the inclined surface, the locking part includes a spring 310 and a locking head 320 adapted to the positioning hole 711, a locking hole 330 is provided on the fixing block 300, and a mounting hole 340 is provided on the hole wall of the locking hole 330, the locking head 320 is slidably inserted into the mounting hole 340, the spring 310 is placed in the mounting hole 340 and the two ends of the spring 310 are respectively in contact with the locking head 320 and the bottom of the mounting hole 340.

[0058] When the wedge block 710 is not inserted into the lock hole 330, the spring 310 holds the lock head 320 tightly against the wall of the lock hole 330. When the wedge block 710 is inserted into the lock hole 330, the inclined surface cooperates with the lock head 320, so that the lock head 320 overcomes the elastic force of the spring 310 and slides into the mounting hole 340. When the wedge block 710 is inserted until the lock head 320 corresponds to the lock hole 330, the lock head 320 is inserted into the positioning hole 711 under the elastic force of the spring 310, so that the lock buckle is connected to the locking portion and locked. It should be noted that after the anchor rod is anchored in the anchor hole, it is usually not used a second time, that is, the double-piece centering device is also a disposable device. After it is installed on the anchor rod body, it does not need to be removed.

[0059] With the above structure, when the double-jointed centering device is installed on the anchor rod body, it is only necessary to insert the wedge block 710 into the locking hole 330 so that the locking head 320 enters the positioning hole 711 on the wedge block 710, thereby locking the wedge block 710 in the locking hole 330 on the fixed block 300. Of course, the length of the flexible belt 700 is configured appropriately so that when the locking head 320 is inserted into the locking hole 330, the flexible belt 700 just tightly binds the circular tube.

[0060] Optionally, the flexible strip 700 is a flexible steel strip, one end of which is welded to the fixing block 300, and the other end of which is welded to the wedge-shaped block 710. Of course, the flexible strip 700 can also be a plastic strap, one end of which is connected to the fixing block 300 by hot melt, and the other end is connected to the lock buckle by hot melt.

[0061] More preferably, a first arcuate groove 110 and a second arcuate groove 410 are respectively provided on the inner walls of the first semicircular tube 100 and the second semicircular tube 400. When the first semicircular tube 100 and the second semicircular tube 400 are spliced ​​together to form a circular tube, the first arcuate groove 110 and the second arcuate groove 410 are spliced ​​together to form an internal thread located on the inner wall of the circular tube, and the internal thread is adapted to the external thread on the outer wall of the anchor rod. In this way, when the double-piece centering device is installed on the anchor rod body, the internal thread engages with the external thread on the outer wall of the anchor rod body (i.e., is screwed together), thereby making the double-piece centering device more securely installed on the anchor rod body.

[0062] More preferably, the first semicircular plate 200 and the second semicircular plate 500 are both provided with weight-reducing notches 800 , which not only reduces the weight of the entire double-jointed centerer but also reduces the material used, thereby saving costs.

[0063] More preferably, the first semicircular plate 200 is disposed in the middle of the first semicircular tube 100, two fixing blocks 300 are symmetrically disposed on either side of the first semicircular plate 200, the second semicircular plate 500 is disposed in the middle of the second semicircular tube 400, two belt loops 600 are symmetrically disposed on either side of the second semicircular plate 500, and two flexible belt bodies 700 correspond one-to-one to the two fixing blocks 300 and the two belt loops 600. This allows the circular tube to be better tightened, thereby more securely connecting the double-jointed centering device to the anchor rod body.

[0064] More preferably, a first reinforcing rib 210 is provided between the first semicircular tube 100 and the first semicircular plate 200, and a second reinforcing rib 520 is provided between the second semicircular tube 400 and the second semicircular plate 500. In this way, the structural strength of the entire double-jointed centering device is higher.

[0065] Example 2:

[0066] This embodiment provides an anchor support system, such as Figure 9 As shown, it includes an anchor rod body, an anchor head 920, a tray 930, a nut 940 and the double-jointed centering device provided in Example 1, wherein:

[0067] The outer wall of the anchor rod body is provided with external threads. The anchor rod body is used to be inserted into an anchor hole in the rock wall. The anchor rod body has an anchoring section and a free end. The anchoring section is anchored in the anchor hole. An anchor head 920 is installed at one end of the anchor rod body. Of course, this anchor head 920 will also be inserted into the anchor hole. A tray 930 is sleeved on the anchor rod body and located outside the anchor hole. A nut 940 is screwed onto the anchor rod body. The nut 940 and the anchor head 920 are respectively located on either side of the tray 930. The nut 940 is used to press the tray 930 against the rock wall. The above-mentioned double-jointed centering device is installed in the middle of the anchor rod body. Specifically, the circular tube composed of the first semicircular tube 100 and the second semicircular tube 400 is sleeved in the middle of the anchor rod body and is tied together by a flexible belt body 700. The double-jointed centering device is located between the tray 930 and the anchor head 920.

[0068] In this way, when the double-split centerer of the anchor support system is installed on the anchor rod body, the construction workers do not need to spend time and energy to pair the double-split centerer, which saves the construction workers' time and energy, and the double-split centerer can be installed on the anchor rod body more conveniently and quickly.

[0069] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A double-jointed centering device, characterized in that: include: A first semicircular tube (100) and a first semicircular plate (200), wherein the first semicircular plate (200) is arranged on the outer wall of the first semicircular tube (100) and is coaxial with the first semicircular tube (100), and a fixing block (300) is arranged on the outer wall of the first semicircular tube (100), and the fixing block (300) is provided with a locking portion; a second semicircular tube (400) and a second semicircular plate (500), wherein the second semicircular plate (500) is arranged on the outer wall of the second semicircular tube (400) and is coaxial with the second semicircular tube (400), and a belt loop (600) is arranged on the outer wall of the second semicircular tube (400); A flexible belt body (700) is fixedly connected to the fixed block (300) at one end and provided with a lock buckle at the other end. The flexible belt body (700) is movably connected to the belt loop (600), and the outer diameter of the lock buckle is larger than the diameter of the belt loop (600); In a first state, the first semicircular tube (100) and the second semicircular tube (400) are spliced ​​together to form a circular tube, the first semicircular plate (200) and the second semicircular plate (500) are spliced ​​together to form a circular plate, the lock buckle is connected to the locking portion, and the flexible belt (700) is used to tighten the circular tube; In the second state, the lock buckle is not connected to the locking portion, and the first semicircular tube (100) and the second semicircular tube (400) are connected via the flexible belt (700).

2. The double-jointed centering device according to claim 1, characterized in that: The lock buckle comprises a wedge-shaped block (710), the wedge-shaped block (710) having a pointed end and a tail end opposite to the pointed end, the wedge-shaped block (710) further comprising an inclined surface between the pointed end and the tail end, and a positioning hole (711) being provided on the inclined surface; The locking portion includes a spring (310) and a locking head (320) adapted to the positioning hole (711); a locking hole (330) is provided on the fixing block (300); a mounting hole (340) is provided on the hole wall of the locking hole (330); the locking head (320) is slidably inserted into the mounting hole (340); the spring (310) is placed in the mounting hole (340) and the two ends of the spring (310) are respectively in contact with the locking head (320) and the bottom of the mounting hole (340); When the wedge-shaped block (710) is inserted into the lock hole (330), the inclined surface cooperates with the lock head (320) so that the lock head (320) overcomes the elastic force of the spring (310) and slides into the mounting hole (340); When the wedge-shaped block (710) is inserted until the lock head (320) corresponds to the lock hole (330), the lock head (320) is inserted into the positioning hole (711) under the elastic force of the spring (310), so that the lock buckle is locked with the locking portion.

3. The double-jointed centering device according to claim 2, characterized in that: The flexible strip (700) is a flexible steel strip, one end of the flexible steel strip is welded to the fixed block (300), and the other end of the flexible strip (700) is welded to the wedge-shaped block (710).

4. The double-jointed centering device according to claim 3, characterized in that: A first arc-shaped groove (110) and a second arc-shaped groove (410) are respectively provided on the inner walls of the first semicircular tube (100) and the second semicircular tube (400); When the first semicircular tube (100) and the second semicircular tube (400) are spliced ​​to form the circular tube, the first arc groove (110) and the second arc groove (410) are spliced ​​to form an internal thread located on the inner wall of the circular tube, and the internal thread is adapted to the external thread on the outer wall of the anchor rod body (910).

5. The double-jointed centering device according to any one of claims 1 to 4, characterized in that: The first semicircular plate (200) and the second semicircular plate (500) are both provided with a weight-reducing notch (800).

6. The double-jointed centering device according to claim 5, characterized in that: The first semicircular plate (200) is arranged in the middle of the first semicircular tube (100), and there are two fixing blocks (300), which are symmetrically arranged on both sides of the first semicircular plate (200); The second semicircular plate (500) is arranged in the middle of the second semicircular tube (400), and the number of the belt loops (600) is two, and the two belt loops (600) are symmetrically arranged on both sides of the second semicircular plate (500); There are two flexible belt bodies (700), and the two flexible belt bodies (700) correspond one to one with the two fixing blocks (300) and the two belt loops (600).

7. The double-jointed centering device according to claim 6, characterized in that: A first reinforcing rib (210) is provided between the first semicircular tube (100) and the first semicircular plate (200); A second reinforcing rib (520) is provided between the second semicircular tube (400) and the second semicircular plate (500).

8. An anchor support system, characterized in that: include: Anchor rod body (910); An anchor head (920) is mounted on one end of the anchor rod body (910); A tray (930) is sleeved on the anchor rod body (910); a nut (940) threadedly connected to the anchor rod body (910), wherein the nut (940) and the anchor head (920) are respectively located on two sides of the tray (930); The double-jointed centralizer according to any one of claims 1 to 7, wherein the circular tube composed of the first semicircular tube (100) and the second semicircular tube (400) is sleeved on the middle part of the anchor rod body (910) and is fastened by the flexible belt body (700), and the double-jointed centralizer is located between the tray (930) and the anchor head (920).

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