Light combined hanging basket for long-span cantilever box girder construction

Abstract

This utility model relates to the field of box girder construction technology, specifically disclosing a lightweight combined hanging basket for the construction of large-span cantilever box girders. It includes a traveling mechanism, a hanging basket mechanism mounted on the traveling mechanism, and an auxiliary reinforcement mechanism mounted on the hanging basket mechanism. The traveling mechanism comprises a bridge deck, a sliding rail, a first anchor rod, a sliding seat, a linkage rod, and a second anchor rod. The hanging basket mechanism comprises a foundation curved rod, a foundation vertical rod, a boom rod, reinforcing ribs, a first foundation horizontal rod, a first upper horizontal plate of the hanging basket, a second upper horizontal plate of the hanging basket, a first lower horizontal plate of the hanging basket, and a second lower horizontal plate of the hanging basket. This solution significantly improves the efficiency and safety of large-span cantilever box girder construction through the synergistic effect of the traveling mechanism, the hanging basket mechanism, and the auxiliary reinforcement mechanism. The traveling mechanism adopts a combination structure of sliding rail and sliding seat, combined with multiple sets of anchor rods and extension plates to achieve smooth movement and precise positioning, effectively avoiding displacement deviations during construction and ensuring accurate connection of the poured sections.

Description

Technical Field

[0001] This utility model relates to the field of box girder construction technology, and specifically discloses a lightweight combined hanging basket for the construction of large-span cantilever box girders. Background Technology

[0002] The box girder formwork is a widely used construction equipment in bridge construction, primarily for cantilever casting. It allows for the gradual casting of various bridge sections, thus enabling the bridge to span the distance. The application of box girder formwork not only improves construction efficiency but also ensures construction safety and quality.

[0003] The application range of box girder hanging baskets is very wide. They can be used in the construction of various types of bridges, including highway bridges, railway bridges, and urban overpasses. For example, the utility model authorized by announcement number CN205662854U discloses a bridge hanging basket cast-in-place box girder support frame, including a horizontal support rod (1). The two ends of the horizontal support rod (1) are respectively installed with vertical baffles (2). The horizontal support rod (1) is placed on the top of the pier (5). A steel hoop (3) is fixedly sleeved in the middle and upper part of the pier (5). The horizontal support rod (1) is composed of several hinged sub-support rods, and each sub-support rod has the same length. A diagonal brace (4) is set at the bottom of each sub-support rod. The top of the diagonal brace (4) is fixedly connected to the bottom of the corresponding sub-support rod. The bottom of the diagonal brace (4) is fixedly installed on the surface of the hoop (3). The bridge hanging basket cast-in-place box girder bracket provided by this utility model has the following advantages: it features simple installation and construction, small material consumption, low cost, and high support strength, enabling stable support of the cast-in-place box girder; it also has the advantages of easy disassembly and recyclable raw materials. Currently, in traditional box girder hanging baskets, the frame points of each other are directly welded and fixed using the same steel structure. This installation method greatly increases the overall weight of the hanging basket, and the disassembly process after use is relatively cumbersome. At the same time, the disassembly connection points are prone to damage to the material surface, affecting the safety of the next use. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a lightweight combined hanging basket for the construction of large-span cantilever box girders, so as to solve the problem that the main frame of the traditional hanging basket is connected by steel, resulting in excessive weight, and the problem that disassembly is complicated due to the welding of steel.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lightweight combined hanging basket for the construction of large-span cantilever box girders, comprising a traveling mechanism, a hanging basket mechanism on the traveling mechanism, and an auxiliary reinforcement mechanism on the hanging basket mechanism; The traveling mechanism includes a bridge deck, a slide rail, an anchor rod one, a sliding seat, a linkage rod, and an anchor rod two; The hanging basket mechanism includes a basic curved rod, a basic vertical rod, a boom rod, a reinforcing rib, a basic horizontal rod one, an upper horizontal plate one for the hanging basket, an upper horizontal plate two for the hanging basket, a lower horizontal plate one for the hanging basket, and a lower horizontal plate two for the hanging basket. The auxiliary reinforcement mechanism includes a first positioning seat, a second positioning seat, fastening screws, a sleeve, and a positioning rod.

[0006] Furthermore, a slide rail is provided at the upper end of the bridge deck, and several anchor rods are distributed on the surface of the slide rail. A slide seat is slidably mounted on the surface of the slide rail. Two sets of slide seats are symmetrically distributed along the upper end of the slide rail. A linkage rod is erected on the upper end of the two slide seats distributed on one side. An anchor rod is provided on the slide seat. The connection position between the linkage rod and the slide seat is fixed through the anchor rod. An extension plate is also symmetrically provided on both sides of the slide seat. An anchor rod is provided in the middle of the extension plate. The extension plate is fixed to the bridge deck through the anchor rod.

[0007] Furthermore, a basic curved rod is provided on one side of the upper end of the linkage rod, and a basic vertical rod is provided on the side of the upper end of the linkage rod away from the basic curved rod. The end of the basic curved rod is fixed to the surface of the basic vertical rod by bolts. A basic horizontal rod is provided between two basic vertical rods distributed along both sides, and several basic horizontal rods are distributed between two basic curved rods distributed along both sides.

[0008] Furthermore, a boom is provided on the side of the foundation vertical rod away from the foundation curved rod. A reinforcing rib is provided at the lower end of the boom, and the other end of the reinforcing rib is provided on the surface of the foundation vertical rod. The two ends of the reinforcing rib are fixed to the surface of the boom and the surface of the foundation vertical rod respectively by screws.

[0009] Furthermore, the ends of the boom rods distributed along both sides that are away from the foundation vertical rods are all provided with the same upper horizontal plate one for the hanging basket, and the upper ends of the foundation vertical rods distributed along both sides are all provided with the same upper horizontal plate two for the hanging basket. Both the upper horizontal plate one and the upper horizontal plate two for the hanging basket are provided with reinforcing curved rods at their upper ends.

[0010] Furthermore, a lower horizontal plate is provided directly below the upper horizontal plate of the basket. Several anchor rods are distributed on the upper horizontal plate. The upper horizontal plate is fixedly installed to the lower horizontal plate via the anchor rods. A lower horizontal plate is provided below the upper horizontal plate. An anchor rod is provided at both ends of the upper horizontal plate. The upper horizontal plate is fixedly installed to the lower horizontal plate via the anchor rods. A reinforcing plate is provided between the lower horizontal plate and the lower horizontal plate.

[0011] Furthermore, a reinforcing seat is provided at the upper end of the lower horizontal plate 2 of the hanging basket, and an anchor rod 6 is provided on the reinforcing seat. The reinforcing seat is fixedly installed to the bridge deck through the anchor rod 6.

[0012] Furthermore, each of the anchor rods four is provided with a positioning seat one and a positioning seat two. Both ends of the positioning seat one and the positioning seat two are fixedly installed by fastening screws. The surface of the anchor rod five is fixedly sleeved with a rod sleeve. A positioning rod is fixedly installed on the outer ring wall of the rod sleeve by bolts. The other end of the positioning rod is fixedly assembled with the surface of the positioning seat one.

[0013] The working principle and beneficial effects of this scheme are as follows: 1. This scheme significantly improves the efficiency and safety of large-span cantilever box girder construction through the synergistic effect of the traveling mechanism, hanging basket mechanism and auxiliary reinforcement mechanism. The traveling mechanism adopts a combination structure of sliding rail and sliding seat, and with multiple sets of anchor rods and extension plates, it can achieve smooth movement and precise positioning, effectively avoid displacement deviation during construction, and ensure accurate connection of the pouring section. The hanging basket mechanism constructs a spatial frame with curved rods, vertical rods and horizontal rods, and forms a stable load-bearing platform with the upper and lower horizontal plates, which can evenly distribute the concrete load and prevent local deformation. The auxiliary reinforcement mechanism provides secondary constraint on key anchor points through positioning seats, rod sleeves and positioning rods, further enhancing the overall rigidity and vibration resistance, and ensuring the structural durability and reliability under long-term construction. 2. As described in point 1, the hanging basket achieves high load-bearing capacity and adaptability while maintaining a lightweight structure. The traveling mechanism can slide across multiple sets of anchors without obstruction, reducing repeated disassembly and assembly steps and improving equipment relocation efficiency. The boom and reinforcing ribs in the hanging basket mechanism extend to create a wide working surface, meeting the cantilever requirements of large-span beam sections. The reinforced curved rods and reinforcing plates further optimize the force transmission path, avoiding stress concentration. The auxiliary reinforcement mechanism connects the independent anchor rods into a whole for bearing the load, significantly improving the bending and shear resistance of the hanging basket under dynamic loads and reducing possible deflection changes during the pouring process.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the distribution of the various mechanisms in the embodiment; Figure 2 This is a front view of the overall structure of the embodiment; Figure 3 This is a side view of the overall structure of the embodiment; Figure 4 This is a bottom view of the overall structure of the embodiment; Figure 5 For the example Figure 4 Enlarged view of point A; Figure 6 This is a top view of the overall structure of the embodiment.

[0016] The following are the markings in the attached diagram: 1. Traveling mechanism; 10. Bridge deck; 11. Slide rail; 12. Anchor rod one; 13. Slide seat; 14. Linkage rod; 15. Anchor rod two; 16. Extension plate; 17. Anchor rod three; 2. Hanging basket mechanism; 20. Basic curved rod; 21. Basic vertical rod; 22. Boom rod; 23. Reinforcing rib; 24. Basic horizontal rod one; 25. Upper horizontal plate one of the hanging basket; 26. Upper horizontal plate two of the hanging basket; 27. Basic horizontal rod two; 28. Reinforcing curved rod; 201. Anchor rod four; 202. Lower horizontal plate one of the hanging basket; 203. Anchor rod five; 204. Lower horizontal plate two of the hanging basket; 205. Reinforcing plate; 2001. Reinforcing seat; 2002. Anchor rod six; 3. Auxiliary reinforcement mechanism; 30. Positioning seat one; 31. Positioning seat two; 32. Fastening screw; 33. Rod sleeve; 34. Positioning rod. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method: Example like Figures 1 to 6 As shown, a lightweight combined hanging basket for the construction of large-span cantilever box girder is disclosed, including a traveling mechanism 1, a hanging basket mechanism 2 is provided on the traveling mechanism 1, and an auxiliary reinforcement mechanism 3 is provided on the hanging basket mechanism 2. The traveling mechanism 1 includes a bridge deck 10, a slide rail 11, an anchor rod 12, a slide block 13, a linkage rod 14, and an anchor rod 2 15; The hanging basket mechanism 2 includes a basic curved rod 20, a basic vertical rod 21, a large arm rod 22, a reinforcing rib 23, a basic horizontal rod 1 24, an upper horizontal plate 1 of the hanging basket 25, an upper horizontal plate 26 of the hanging basket 26, a lower horizontal plate 1 of the hanging basket 202, and a lower horizontal plate 204 of the hanging basket 204. The auxiliary reinforcement mechanism 3 includes a first positioning seat 30, a second positioning seat 31, a fastening screw 32, a rod sleeve 33, and a positioning rod 34.

[0018] A slide rail 11 is provided at the upper end of the bridge deck 10. Two slide rails 11 are provided and are arranged parallel to each other. Several anchor rods 12 are distributed on the surface of the slide rail 11. The slide rail 11 is fixed to the bridge deck 10 through the anchor rods 12. The anchor rods 12 are evenly spaced. Slide seats 13 are slidably mounted on the surface of the slide rail 11. Two sets of slide seats 13 are symmetrically distributed along the upper end of the slide rail 11. When the slide seats 13 slide on the slide rail 11, they directly cross the anchor rods 12 without being obstructed. A linkage rod 14 is erected on the upper end of the two slide seats 13 distributed on one side. The linkage rod 14 is horizontally positioned. Anchor rods 15 are provided on the slide seats 13. The connection between the moving rod 14 and the slide block 13 is fixed by the second anchor rod 15. The two slide blocks 13 distributed on one side can be connected and linked by the linkage rod 14 to form a walking bottom structure, which increases the overall structural stability. There are also symmetrical extension plates 16 on both sides of the slide block 13. One end of the extension plate 16 is fixed to the connection with the slide block 13 by welding. An anchor rod 17 is set in the middle of the extension plate 16. The extension plate 16 and the bridge deck 10 are fixed by the anchor rod 17. The anchor rod 17, together with the extension plate 16, can tighten the position of the slide block 13 after it moves on the slide rail 11, thereby ensuring that the position of the walking part will not move when the hanging basket is in operation.

[0019] A foundation curved rod 20 is provided on one side of the upper end of the linkage rod 14. The connection between the foundation curved rod 20 and the linkage rod 14 is fixed with bolts. A foundation vertical rod 21 is provided on the upper end of the linkage rod 14 away from the foundation curved rod 20. The connection between the foundation vertical rod 21 and the foundation curved rod 20 is fixed with bolts. The end of the foundation curved rod 20 is fixed to the surface of the foundation vertical rod 21 with bolts. A foundation horizontal rod 24 is provided between two foundation vertical rods 21 distributed on both sides. The connection between the foundation horizontal rod 24 and the foundation vertical rod 21 is anchored with bolts. Several foundation horizontal rods 27 are distributed between two foundation curved rods 20 distributed on both sides. The two ends of the foundation horizontal rods 27 are anchored to the corresponding foundation curved rods 20 with bolts. Through the cooperation of the foundation curved rod 20, foundation vertical rod 21, foundation horizontal rod 24 and foundation horizontal rod 27, the entire load-bearing area of ​​the hanging basket has a good frame stability effect.

[0020] A boom 22 is provided on the side of the foundation vertical rod 21 away from the foundation curved rod 20. The connection between the boom 22 and the foundation vertical rod 21 is anchored by bolts. A reinforcing rib 23 is provided at the lower end of the boom 22. The reinforcing rib 23 is inclined. The other end of the reinforcing rib 23 is provided on the surface of the foundation vertical rod 21. The two ends of the reinforcing rib 23 are fixed to the surface of the boom 22 and the surface of the foundation vertical rod 21 by screws. When the boom 22 is installed in the hanging area of ​​the hanging basket, it can extend stably outward. At the same time, the reinforcing rib 23 can ensure the stability of the support of the boom 22.

[0021] The ends of the booms 22 distributed along both sides away from the foundation verticals 21 are all provided with the same upper horizontal plate 25 of the hanging basket. The upper horizontal plate 25 of the hanging basket is fixed to any boom 22 by welding. The upper ends of the foundation verticals 21 distributed along both sides are all provided with the same upper horizontal plate 26 of the hanging basket. The upper horizontal plate 26 of the hanging basket is fixed to any foundation vertical 21 by bolts. The upper ends of the upper horizontal plate 25 and the upper horizontal plate 26 of the hanging basket are both provided with reinforcing curved rods 28. The two ends of the reinforcing curved rods 28 are fixed to the upper horizontal plate 25 and the upper horizontal plate 26 of the hanging basket by screws. Through the connection of the reinforcing curved rods 28, the upper horizontal plates 25 and 26 of the hanging basket, which are distributed above to form the hanging basket, can be stably connected.

[0022] A lower horizontal plate 202 is installed directly below the upper horizontal plate 25 of the hanging basket. Several anchor rods 201 are distributed on the upper horizontal plate 25. The upper horizontal plate 25 is fixedly installed to the lower horizontal plate 202 via the anchor rods 201. A lower horizontal plate 204 is installed below the upper horizontal plate 26 of the hanging basket. Anchor rods 203 are installed at both ends of the upper horizontal plate 26. Anchor rod 5 203 is fixedly installed to the lower horizontal plate 204 of the hanging basket. A reinforcing plate 205 is provided between the lower horizontal plate 1 202 and the lower horizontal plate 204 of the hanging basket. The two ends of the reinforcing plate 205 are fixed to the connection positions of the lower horizontal plate 1 202 and the lower horizontal plate 204 of the hanging basket with bolts. The lower horizontal plate 1 202, the lower horizontal plate 204 of the hanging basket and the reinforcing plate 205 can ensure the stability of the frame under the hanging basket.

[0023] A reinforcing seat 2001 is provided at the upper end of the lower horizontal plate 204 of the hanging basket. The reinforcing seat 2001 is a right-angle frame structure. The lower end of the reinforcing seat 2001 is fixed to the lower horizontal plate 204 of the hanging basket with bolts. Anchor rods 6 2002 are provided on the reinforcing seat 2001. The reinforcing seat 2001 is fixedly installed to the bridge deck 10 through the anchor rods 6 2002. With the cooperation of the reinforcing seat 2001, the connection between the lower horizontal plate 204 of the hanging basket and the bridge deck 10 is more stable.

[0024] Several anchor rods 201 are respectively provided with positioning seats 30 and 31. Positioning seats 30 and 31 are fitted together. By splicing positioning seats 30 and 31, multiple anchor rods 201 arranged side by side can be reinforced and connected. Both ends of positioning seats 30 and 31 are fixedly installed with fastening screws 32. Anchor rods 203 are fixedly sleeved with rod sleeves 33. Positioning rods 34 are fixedly installed on the outer ring wall of the rod sleeves 33 with bolts. The other end of the positioning rods 34 is fixedly assembled with the surface of positioning seat 30. Through the cooperation of the rod sleeves 33 and the positioning rods 34, the multiple anchor rods used for vertical connection in the middle of the hanging basket can be fixed to each other, thereby making the frame of the hanging basket more stable.

[0025] In practice The walking mechanism 1 of this scheme realizes the overall movement of the hanging basket through the sliding cooperation of the slide rail 11 and the slide seat 13. The slide rail 11 is fixed to the bridge deck 10 at equal intervals by the anchor rod 12 to provide a stable support foundation. The slide seats 13 are set in pairs on the slide rail 11 and connected by the linkage rod 14 to form an overall walking unit. The linkage rod 14 is fixed to the slide seat 13 by the anchor rod 2 15 to ensure the synchronicity and structural rigidity during movement. After moving into place, the slide seat 13 is anchored to the bridge deck 10 by the extension plates 16 on both sides of the slide seat 13 and the anchor rod 3 17 to prevent the hanging basket from shifting during construction. During the entire walking process, the slide seat 13 can cross the anchor rod 12 and slide without obstruction, realizing the rapid and stable positioning and fixing of the hanging basket, and providing a movable support platform for cantilever construction. The hanging basket mechanism 2 forms a spatial load-bearing structure through the foundation curved rod 20, foundation vertical rod 21, boom rod 22, and various horizontal rods and plates. The foundation curved rod 20 and foundation vertical rod 21 are respectively bolted to the linkage rod 14 and to each other, forming the vertical and side support frame of the hanging basket. The foundation horizontal rod one 24 connects the foundation vertical rods 21 on both sides, and the foundation horizontal rod two 27 connects the foundation curved rods 20 on both sides, enhancing the overall rigidity and stability. The boom rod 22 extends outward and is obliquely connected to the foundation vertical rod 21 through the reinforcing rib 23, improving the bending and shear resistance of the cantilever end. The upper horizontal plate one 25 and the upper horizontal plate two 26 of the hanging basket are respectively fixed to the upper ends of the boom rod 22 and the foundation vertical rod 21, and are connected to each other through the reinforcing curved rod 28 to form the upper construction platform, which jointly bears the concrete pouring load. The auxiliary reinforcement mechanism 3 enhances the overall integrity and local rigidity of the hanging basket through various anchor rods and connecting components. Anchor rod four 201 connects the upper horizontal plate one 25 and the lower horizontal plate one 202 of the hanging basket, and anchor rod five 203 connects the upper horizontal plate two 26 and the lower horizontal plate two 204 of the hanging basket, forming a vertical force transmission path. Positioning seat one 30 and positioning seat two 31 clamp the side-by-side anchor rod four 201 with fastening screws 32 to prevent individual loosening or instability. Set 33 is installed on the outer wall of anchor rod 5 203 and connected to positioning seat 1 30 through positioning rod 34, so that anchor rods at different positions are connected to each other to form a cooperative force-bearing system. Reinforcing plate 205 connects lower horizontal plate 1 202 and lower horizontal plate 2 204 of hanging basket. Reinforcing seat 2001 anchors lower horizontal plate 2 204 of hanging basket to bridge deck 10 through anchor rod 6 2002, further restricting vertical and horizontal displacement and ensuring construction safety and forming quality.

[0026] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A light combined hanging basket for long-span cantilever box girder construction, characterized in that: It includes a walking mechanism, on which a hanging basket mechanism is provided, and on which an auxiliary reinforcement mechanism is provided; The traveling mechanism includes a bridge deck, a slide rail, an anchor rod one, a sliding seat, a linkage rod, and an anchor rod two; The hanging basket mechanism includes a basic curved rod, a basic vertical rod, a boom rod, a reinforcing rib, a basic horizontal rod one, an upper horizontal plate one for the hanging basket, an upper horizontal plate two for the hanging basket, a lower horizontal plate one for the hanging basket, and a lower horizontal plate two for the hanging basket. The auxiliary reinforcement mechanism includes a first positioning seat, a second positioning seat, fastening screws, a sleeve, and a positioning rod.

2. The light combined hanging basket for long-span cantilever box girder construction according to claim 1, characterized in that: The upper end of the bridge deck is equipped with a slide rail, and several anchor rods are distributed on the surface of the slide rail. Slide seats are slidably mounted on the surface of the slide rail. There are two sets of slide seats symmetrically distributed along the upper end of the slide rail. A linkage rod is erected on the upper end of the two slide seats distributed on one side. Anchor rods are installed on the slide seats. The connection between the linkage rod and the slide seat is fixed through the anchor rods. Extension plates are also symmetrically mounted on both sides of the slide seats. Anchor rods are installed in the middle of the extension plates. The extension plates are fixed to the bridge deck through the anchor rods.

3. The light combined hanging basket for long-span cantilever box girder construction according to claim 2, characterized in that: A foundation curved rod is provided on one side of the upper end of the linkage rod, and a foundation vertical rod is provided on the side of the upper end of the linkage rod away from the foundation curved rod. The end of the foundation curved rod is fixed to the surface of the foundation vertical rod by bolts. A foundation horizontal rod I is provided between two foundation vertical rods distributed along both sides, and several foundation horizontal rods II are distributed between two foundation curved rods distributed along both sides.

4. The light combined hanging basket for long-span cantilever box girder construction according to claim 3, characterized in that: A boom is provided on the side of the foundation vertical rod away from the foundation curved rod. A reinforcing rib is provided at the lower end of the boom, and the other end of the reinforcing rib is provided on the surface of the foundation vertical rod. The two ends of the reinforcing rib are fixed to the surface of the boom and the surface of the foundation vertical rod respectively by screws.

5. The light combined hanging basket for long-span cantilever box girder construction according to claim 4, characterized in that: The ends of the booms distributed along both sides away from the foundation verticals are all provided with the same upper horizontal plate one for the hanging basket, and the upper ends of the foundation verticals distributed along both sides are all provided with the same upper horizontal plate two for the hanging basket. Both the upper horizontal plate one and the upper horizontal plate two for the hanging basket are provided with reinforcing curved rods at their upper ends.

6. The light combined hanging basket for long-span cantilever box girder construction according to claim 5, characterized in that: A lower horizontal plate is located directly below the upper horizontal plate of the basket. Several anchor rods are distributed on the upper horizontal plate. The upper horizontal plate is fixedly installed to the lower horizontal plate via the anchor rods. A lower horizontal plate is located below the upper horizontal plate. An anchor rod is located at both ends of the upper horizontal plate. The upper horizontal plate is fixedly installed to the lower horizontal plate via the anchor rods. A reinforcing plate is located between the lower horizontal plate and the lower horizontal plate.

7. The light combined hanging basket for long-span cantilever box girder construction according to claim 6, characterized in that: A reinforcing seat is provided at the upper end of the lower horizontal plate 2 of the hanging basket, and an anchor rod 6 is provided on the reinforcing seat. The reinforcing seat is fixedly installed to the bridge deck through the anchor rod 6.

8. The light combined hanging basket for long-span cantilever box girder construction according to claim 7, characterized in that: The surfaces of several anchor rods four are respectively provided with positioning seat one and positioning seat two. Both ends of positioning seat one and positioning seat two are fixedly installed by fastening screws. An anchor rod five is fixedly sleeved on its surface. A positioning rod is fixedly installed on the outer ring wall of the rod sleeve by bolts. The other end of the positioning rod is fixedly assembled with the surface of positioning seat one.

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