Large-diameter long-inclined embedded bolt measuring installation method and angle adjusting device

Abstract

The application provides a large-diameter long-inclination embedded bolt measurement installation method and an angle adjusting device. The application utilizes a frame support to control the inclination angle of the embedded bolt, utilizes a positioning steel plate device to control the elevation and relative position relationship of the embedded bolt, and only needs to measure the center plane coordinate of the bolt top during the later installation positioning measurement. The application ingeniously converts the complex inclination angle measurement into simple plane coordinate measurement, reduces the measurement difficulty and process during the installation, greatly shortens the embedded bolt measurement installation time, and improves the precision of the embedded bolt installation. The application decomposes the difficulty of the embedded bolt installation positioning, utilizes a bolt leveling device, a frame support and a positioning plate combination device to complete the elevation, plane position and inclination angle control of the embedded bolt, and reduces the installation measurement workload.

Description

Technical Field

[0001] This invention relates to the field of embedded bolt fixing technology, and in particular to a method for measuring and installing large-diameter, long, inclined embedded bolts and an angle adjustment device. Background Technology

[0002] The pre-embedded bolts have large diameters, long lengths, and inclined angles, making it difficult to control their pre-embedding accuracy. Conversely, the accuracy requirements for pre-embedding are very high, demanding that the subsequent derrick installation be successful on the first attempt. Therefore, the accuracy of the planar position, elevation, and inclination angle of the pre-embedded bolts plays a decisive role in the successful installation of the derrick steel structure.

[0003] The installation of anchor bolts for derricks typically involves pre-drilling bolt holes during the pouring of the derrick foundation concrete, then embedding the anchor bolts after the derrick equipment is installed, followed by the pouring of concrete. However, due to the significant risks and difficulties associated with pre-embedding large-diameter, extra-long, and inclined bolts, and the high precision required, this method is rarely used.

[0004] Existing methods for measuring and installing large-diameter, long, inclined embedded bolts involve a large amount of measurement work and a long overall installation time. At the same time, the accuracy control during the installation process is poor, and it is difficult to conveniently adjust and control the angle of the embedded bolts during installation. As a result, the overall structural robustness and stability are poor. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a method for measuring and installing large-diameter, long, inclined pre-embedded bolts, along with an angle adjustment device. This invention breaks down the difficulty of positioning the pre-embedded bolts by using a bolt leveling device, a frame support, and a positioning plate combination device to control the elevation, planar position, and inclination angle of the pre-embedded bolts, reducing the workload of installation and measurement. The steel structure, through pre-design and fabrication and bolted connections, ensures installation accuracy and saves installation time, ultimately achieving precise bolt pre-embedding. This allows the derrick bolts to be poured into the derrick foundation along with the derrick foundation, forming an integral structure, making the derrick installation more robust, safe, and reliable.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A method for measuring and installing large-diameter, long, inclined pre-embedded bolts includes the following steps:

[0008] S1. Concrete I-beam base construction: Measure and locate the positions of the first I-beams of the four bases; and fix the four first I-beams.

[0009] S2. Install bolt leveling device: Measure the accurate position of the first column connecting steel plate and fix the first column connecting steel plate at the accurate position;

[0010] S3. Assemble the frame support columns and frame support slope structure: Process the inclined openings with a predetermined slope at the upper end of the long and short columns, and install the frame support slope structure on the surface of the inclined openings;

[0011] S4. Assembly of the pre-embedded bolt positioning assembly: Support and fix the top positioning steel plate and the bottom positioning steel plate, and insert four pre-embedded bolts in sequence into the pre-embedded bolt holes on the surface of the top positioning steel plate and the bottom positioning steel plate to complete the elevation control of the pre-embedded bolts and the control of the relative position relationship between the bolts.

[0012] S5. Assemble and adjust the pre-embedded bolt positioning assembly with the frame support: After the pre-embedded bolt positioning assembly is assembled in place, weld the transverse support steel pipe, weld the transverse support steel pipe to the long column, insert the angle adjustment device, and adjust the angle of the pre-embedded bolt through the angle adjustment device.

[0013] The above method breaks down the difficulty of positioning the pre-embedded bolts. By using a bolt leveling device, a combination of frame support and positioning plate, the elevation, plane position, and tilt angle of the pre-embedded bolts can be controlled, reducing the workload of installation measurement. The steel structure is pre-designed and processed, and bolted connections can ensure installation accuracy and save the time of pre-embedded bolt installation. Ultimately, the bolts are accurately pre-embedded, and the derrick bolts are poured with the derrick foundation to form an integral structure, making the derrick installation more solid, safe, and reliable.

[0014] Preferably, in step S1, a concrete foundation is first poured, and the first I-beam is vertically positioned on the upper surface of the concrete foundation. The first I-beam is then fixed by pouring a concrete base. By pre-embedding the first I-beam in the concrete structure, the stability of the overall structure can be ensured, as well as the stability of the subsequent installation of the frame structure and the pre-embedded bolts.

[0015] Preferably, in step S2, four sets of bolt adjustment assemblies are welded onto each first I-beam. The height of the first column connecting steel plate is adjusted by rotating the bolts to reach the design height. The accurate position of the first column connecting steel plate is measured using a total station. The height of the first column connecting steel plate can be adjusted and initially limited by the bolt adjustment assemblies, saving the overall adjustment time and improving the efficiency of the measurement and installation of the pre-embedded bolts.

[0016] Preferably, in step S2, the first I-beam and the connecting steel plate of the first column are welded together using a welding plate. The welding plate can fix the first I-beam and the connecting steel plate of the first column, ensuring the stability of the connection between the two, and further ensuring the stability of the subsequent installation of the frame structure and the pre-embedded bolts.

[0017] Preferably, in step S3, a third column connecting steel plate is welded to the beveled surface, and the second column connecting steel plate is bolted to the first column connecting steel plate; the second I-beam is bolted to the third column connecting steel plate; the channel steel is bolted to the second I-beam through the channel steel connecting plate; the overall structure is designed to be detachable, which reduces the difficulty of assembling the overall structure and facilitates the disassembly and recycling of the overall structure in the later stage, thereby reducing the cost of pre-embedded bolt installation.

[0018] Preferably, in step S4, a total station is used to check the levelness, verticality, and spacing of the top and bottom positioning steel plates; the levelness of the pre-embedded bolt rods is leveled using the total station to ensure that the assembled pre-embedded bolts are perpendicular to the positioning steel plates; then, the distance between the four bolts and the exposed length of the threaded ends are adjusted according to the parameters in the design drawings to meet the design requirements; finally, the pre-embedded bolts are connected and fixed to the top and bottom positioning steel plates into a whole by bolts and welding, thus completing the elevation control of the pre-embedded bolts and the control of the relative positional relationship between the bolts.

[0019] Preferably, in step S5, the welding positions of the transverse support steel pipes are marked on the two long columns. After the pre-embedded bolt positioning assembly is assembled, the transverse support steel pipes are welded. The pre-embedded bolt positioning assembly is hoisted as a whole onto the frame support inclined structure using a crane, so that the top positioning steel plate is closely fitted with the second I-beam and channel steel in the frame support inclined structure, thus completing the assembly of the pre-embedded bolt positioning assembly with the frame support.

[0020] Preferably, after the pre-embedded bolt positioning assembly device and the frame support are assembled in step S5, an angle adjustment device is inserted between the transverse support steel pipe and the long column, and the pre-embedded bolt is adjusted by the angle adjustment device.

[0021] An angle adjustment device for a large-diameter long inclined pre-embedded bolt includes a horizontally arranged transverse support steel pipe installed inside the pre-embedded bolt. A wedge-shaped iron block is provided between the transverse support steel pipe and the pre-embedded bolt. The long vertical side of the wedge-shaped iron block abuts against the pre-embedded bolt, and the long inclined side of the wedge-shaped iron block abuts against the transverse support steel pipe.

[0022] The above scheme allows for fine-tuning of the angle of the embedded bolts to ensure accurate installation. At the same time, the wedge-shaped iron block can be locked between the embedded bolts and the transverse support steel pipe, ensuring the stability of the overall structure.

[0023] Preferably, the long inclined side surface of the wedge-shaped iron block is provided with an adjusting toothed plate, and an adjusting gear adapted to the adjusting toothed plate is rotatably provided on the outer side of the transverse support steel pipe. A drive device for controlling the unidirectional rotation of the adjusting gear is provided on the surface of the transverse support steel pipe. With the above structure, it is convenient to control the wedge-shaped iron block, especially for adjusting wedge-shaped iron blocks with a high vertical height; it accelerates the efficiency of the pre-embedded bolt installation; and the overall installation structure is more stable during the adjustment process.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention reduces the difficulty of measuring embedded bolts, especially the angle control measurement of large-diameter inclined bolts, and improves the installation measurement accuracy. Because the plane center coordinates of large-diameter inclined bolts cannot be accurately measured in actual operations, their inclination angle is difficult to achieve using only a total station. This invention utilizes a frame support to control the inclination angle of the embedded bolts, and a positioning steel plate device to control the elevation and relative position of the embedded bolts. Subsequent installation positioning measurements only require measuring the plane coordinates of the bolt's top center. This cleverly transforms the complex inclination angle measurement into a simple plane coordinate measurement, reducing the difficulty and procedures during installation, greatly shortening the measurement and installation time of embedded bolts, and improving the accuracy of embedded bolt installation.

[0026] 2. This invention shortens the installation time of large-diameter, ultra-long, inclined pre-embedded bolts. Due to the change in measurement method, the processing, fabrication, and assembly of frame support and positioning steel plates can be carried out simultaneously and in parallel, without affecting the critical path schedule. In addition, the measurement process is simplified, thus significantly reducing the actual installation measurement time of the pre-embedded bolts.

[0027] 3. This invention ensures the installation accuracy of the pre-embedded bolts. The main steel structure is connected by bolts, ensuring installation accuracy while making assembly more convenient and faster. Simultaneously, the angle of the pre-embedded bolts can be fine-tuned using an angle adjustment device, further ensuring that the angle of the pre-embedded bolts is within the predetermined angle range. This invention overcomes the difficulties in the pre-embedding construction of large-diameter, ultra-long inclined bolts, and is highly operable and widely applicable. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the installation and measurement structure for the large-diameter, ultra-long, inclined pre-embedded bolts of the present invention.

[0029] Figure 2 This is a schematic diagram of the concrete-casting I-beam base support structure of the present invention.

[0030] Figure 3 This is a schematic diagram of the method for leveling the connecting plate using a leveling bolt device according to the present invention.

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of the structure along direction A.

[0032] Figure 5 For the present invention Figure 1 A schematic diagram of the B-direction structure with the frame-supported inclined structure not installed.

[0033] Figure 6 For the present invention Figure 1 A schematic diagram of the cross-sectional structure along line I-I.

[0034] Figure 7 This is a schematic diagram of the assembly structure of the positioning plate steel plate and the pre-embedded bolts of the present invention.

[0035] Figure 8 This is a schematic diagram of the first embodiment of the pre-embedded bolt angle adjustment device of the present invention.

[0036] Figure 9 This is a schematic diagram of the second embodiment of the pre-embedded bolt angle adjustment device of the present invention.

[0037] In the diagram: 1. Concrete I-beam base; 101. Concrete pad; 102. Concrete base; 103. First I-beam; 2. Bolt leveling device; 201. Bolt adjusting assembly; 202. First column connecting steel plate; 203. Welded plate; 3. Frame support vertical column; 301. Second column connecting steel plate; 302. Long column; 303. Short column; 4. Frame support inclined structure; 401. Second I-beam; 402. Channel steel; 403. Third column connecting steel plate; 404. Channel steel connecting plate; 5. Embedded bolt positioning assembly device; 501. Embedded bolt; 502. Top positioning steel plate; 503. Bottom positioning steel plate; 6. Horizontal support steel pipe; 601. Adjusting gear; 7. Wedge-shaped iron block; 701. Adjusting tooth plate. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] See attached document Figure 1 -Appendix Figure 9 A method for measuring and installing large-diameter, long, inclined pre-embedded bolts, comprising the following steps:

[0040] Please refer to the appendix for details. Figure 2 Step 1: Construct concrete I-beam base 1. Pour concrete foundation 101, accurately measure and locate the positions of the first I-beam 103 of the four bases with a total station, and pour concrete base 102 to fix the first I-beam 103.

[0041] Please refer to the appendix for details. Figure 2 Appendix Figure 3Step 2: Install bolt leveling device 2. Weld four sets of bolt adjustment components 201 onto each first I-beam 103. Adjust the height of the first column connecting steel plate 202 by rotating the bolts to achieve the designed height. Use a total station to measure the accurate position of the first column connecting steel plate 202. Use welding plate 203 to weld the first I-beam 103 and the first column connecting steel plate 202 into a whole. At this point, the planar position measurement of the pre-embedded bolts has been completed.

[0042] Appendix Figure 5 -Appendix Figure 6 Assemble the frame supporting the vertical column 3 and the frame supporting the inclined structure 4. The specific implementation steps are as follows:

[0043] Step 3: Weld the second column connecting steel plate 301 to the lower end of the long column 302 and the short column 303. The upper end of the plate is processed into a bevel with a predetermined slope according to the design drawings, and the third column connecting steel plate 403 is welded on. The second column connecting steel plate 301 is bolted to the first column connecting steel plate 202. The second I-beam 401 is bolted to the third column connecting steel plate 403. The channel steel 402 is bolted to the second I-beam 401 through the channel steel connecting plate 404. At this time, the tilt angle control of the pre-embedded bolts has been completed.

[0044] It should be noted that some of the welding of components in the above steps were manufactured by the factory according to the design drawings, which better ensures the installation accuracy. For example, the welding of the long column 302, the short column 303 to the connecting steel plate 301 of the second column, and the connecting steel plate 403 of the third column; and the processing and control of the upper slope of the long column 302 and the short column 303.

[0045] Please refer to the appendix for details. Figure 7 The assembly of the pre-embedded bolt positioning assembly 5 is carried out in the following steps:

[0046] Step 4: On a leveled site, support and fix the top positioning steel plate 502 and the bottom positioning steel plate 503. Use a total station to check their levelness, verticality, and spacing to ensure that the positions of the pre-embedded bolt holes are consistent. Insert four pre-embedded bolts 501 in sequence, and use a total station to level the level of the pre-embedded bolt rods to ensure that the assembled pre-embedded bolts are perpendicular to the positioning steel plates. Then, adjust the distance between the four bolts and the exposed length of the threaded ends according to the parameters in the design drawings to meet the design requirements. Finally, connect and fix the pre-embedded bolts 501 to the top positioning steel plate 502 and the bottom positioning steel plate 503 into a whole by bolting and welding. This completes the control of the elevation of the pre-embedded bolts and the control of the relative positional relationship between the bolts.

[0047] Please refer to the appendix for details. Figure 1 and appendix Figure 8 The pre-embedded bolt positioning assembly 5 is assembled with the frame support and adjusted. The specific implementation steps are as follows:

[0048] Step 5: Mark the welding positions of the transverse support steel pipes 6 on the two long columns 302. After the pre-embedded bolt positioning assembly 5 is assembled, weld the transverse support steel pipes 6 to support the lower end of the pre-embedded bolt positioning assembly 5, ensuring that the whole assembly will not deform due to its own weight and affect the installation accuracy. Use a crane to hoist the pre-embedded bolt positioning assembly 5 onto the frame support inclined structure 4, so that the top positioning steel plate 502 is tightly attached to the second I-beam 401 and channel steel 402 in the frame support inclined structure 4. Weld the transverse support steel pipes 6 to the long columns 302 at the marked positions and insert the angle adjustment device.

[0049] A total station was set up to measure the plane coordinates and elevation data of the top center of the pre-embedded bolt. Installation errors were checked and verified. The angle of the pre-embedded bolt 501 was adjusted using an angle adjustment device until the error met the specifications. Then, the top positioning steel plate 502 was connected to the second I-beam 401 using bolts. This completed the installation and positioning of the large-diameter, extra-long, inclined pre-embedded bolt 501.

[0050] As a first embodiment of the above-mentioned angle adjustment device, a separate wedge-shaped iron block 7 can be selected. The wedge-shaped iron block 7 is inserted between the pre-embedded bolt 501 and the transverse support steel pipe 6 to adjust the angle of the pre-embedded bolt 501. As a second embodiment of the above-mentioned angle adjustment device, an adjustment toothed plate 701 can be opened on the inclined side wall surface of the wedge-shaped iron block 7. At the same time, an adjustment gear 601 that rotatably cooperates with the adjustment toothed plate 701 is sleeved on the outside of the transverse support steel pipe 6. The position of the wedge-shaped iron block 7 can be adjusted and controlled by controlling the rotation of the adjustment gear 601 from the outside.

[0051] Please refer to the appendix for details. Figure 8 and appendix Figure 9 A device for adjusting the angle of a large-diameter, long, inclined pre-embedded bolt includes a horizontally arranged transverse support steel pipe 6 installed inside the pre-embedded bolt 501. A wedge-shaped iron block 7 is placed between the transverse support steel pipe 6 and the pre-embedded bolt 501. The long vertical side of the wedge-shaped iron block 7 abuts against the pre-embedded bolt 501, and the long inclined side of the wedge-shaped iron block 7 abuts against the transverse support steel pipe 6. The surface of the long inclined side of the wedge-shaped iron block 7 is selected to be a rough surface, while the surface of the long vertical side can be selected to be a smooth surface. During the adjustment process, the wedge-shaped iron block 7 is inserted into the gap between the pre-embedded bolt 501 and the transverse support steel pipe 6 to change the inclination angle of the pre-embedded bolt 501. Through the above scheme, the angle of the pre-embedded bolt 501 can be finely adjusted to ensure the accuracy of the installation position of the pre-embedded bolt 501. At the same time, the wedge-shaped iron block 7 can be locked between the pre-embedded bolt 501 and the transverse support steel pipe 6 to ensure the stability of the overall structure.

[0052] To facilitate control of the wedge-shaped iron block 7, especially for wedge-shaped iron blocks 7 with a high vertical height, an adjusting toothed plate 701 is provided on the long inclined side surface of the wedge-shaped iron block 7. An adjusting gear 601, adapted to the adjusting toothed plate 701, is rotatably mounted on the outer side of the transverse support steel pipe 6. A drive device for controlling the unidirectional rotation of the adjusting gear 601 is provided on the surface of the transverse support steel pipe 6. This drive device can be a drive roller with a one-way bearing installed inside. The drive roller is fixed to the adjusting gear 601, and a drive rope is sleeved on the surface of the drive roller. By pulling the drive rope, the unidirectional rotation of the drive roller can be controlled. At the same time, under the limit of the one-way bearing, avoids... The rotation of the driveless roller and adjusting gear 601 ensures the stability of the overall structure. Through this configuration, under the structural constraints of adjusting gear 601 and adjusting toothed plate 701, the pre-embedded bolt 501 maintains a stable tilt. Simultaneously, workers can pull the drive rope from the bottom to adjust the position of the wedge-shaped iron block 7, thereby quickly adjusting the deflection angle of the pre-embedded bolt 501 and further accelerating the installation efficiency. By controlling the rotation of the adjusting gear 601 by pulling the drive rope from below, the direction of force on the drive rope is the same as that of the long column 302, making the overall installation structure more stable during adjustment.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for measuring and installing large-diameter, long, inclined pre-embedded bolts, characterized in that, Includes the following steps: S1. Construction of concrete I-beam base (1): Measure and locate the positions of the four base first I-beams (103); and fix the four first I-beams (103). S2. Install bolt leveling device (2): Measure the accurate position of the first column connecting steel plate (202) and fix the first column connecting steel plate (202) at the accurate position; S3. Assemble the frame support vertical column (3) and frame support inclined structure (4): Process the inclined opening with a predetermined slope at the upper end of the long column (302) and short column (303), and install the frame support inclined structure (4) on the surface of the inclined opening. S4. Assembly of the pre-embedded bolt positioning assembly (5): The top positioning steel plate (502) and the bottom positioning steel plate (503) are supported and fixed. Four pre-embedded bolts (501) are inserted into the pre-embedded bolt holes on the surface of the top positioning steel plate (502) and the bottom positioning steel plate (503) in sequence to complete the elevation control of the pre-embedded bolts and the control of the relative position relationship between the bolts. S5. The pre-embedded bolt positioning assembly device (5) is assembled and adjusted with the frame support: After the pre-embedded bolt positioning assembly device (5) is assembled in place, the transverse support steel pipe (6) is welded, the transverse support steel pipe (6) is welded to the long column (302), the angle adjustment device is inserted, and the angle of the pre-embedded bolt (501) is adjusted by the angle adjustment device. A large-diameter long inclined pre-embedded bolt angle adjustment device is used, including a horizontal support steel pipe (6) installed inside the pre-embedded bolt (501) and arranged horizontally. A wedge-shaped iron block (7) is provided between the horizontal support steel pipe (6) and the pre-embedded bolt (501). The long vertical side of the wedge-shaped iron block (7) abuts against the pre-embedded bolt (501), and the long inclined side of the wedge-shaped iron block (7) abuts against the horizontal support steel pipe (6). Insert the wedge-shaped iron block into the gap between the pre-embedded bolt and the transverse support steel pipe to change the angle of inclination of the pre-embedded bolt.

2. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, In step S1, a concrete pad (101) is first poured, and the first I-beam (103) is vertically positioned on the upper surface of the concrete pad (101). The first I-beam (103) is then fixed by pouring a concrete base (102).

3. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, In step S2, four sets of bolt adjustment assemblies (201) are welded on each first I-beam (103). The height of the first column connecting steel plate (202) is adjusted by rotating the bolts to reach the design height. The accurate position of the first column connecting steel plate (202) is measured using a total station.

4. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, In step S2, the first I-beam (103) and the first column connecting steel plate (202) are welded together using a welding plate (203).

5. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, In step S3, the third column connecting steel plate (403) is welded to the bevel surface, and the second column connecting steel plate (301) is bolted to the first column connecting steel plate (202); the second I-beam (401) is bolted to the third column connecting steel plate (403); the channel steel (402) is bolted to the second I-beam (401) through the channel steel connecting plate (404).

6. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, In step S4, a total station is used to check the levelness, verticality, and spacing of the top positioning steel plate (502) and the bottom positioning steel plate (503); the levelness of the pre-embedded bolt rod is leveled using a total station to ensure that the assembled pre-embedded bolt is perpendicular to the positioning steel plate; then, the distance between the four bolts and the exposed length of the threaded end are adjusted according to the parameters of the design drawings to meet the design requirements; finally, the pre-embedded bolt (501) is connected and fixed to the top positioning steel plate (502) and the bottom positioning steel plate (503) into a whole by bolts and welding, thus completing the elevation control of the pre-embedded bolt and the control of the relative positional relationship between the bolts.

7. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, In step S5, the welding positions of the transverse support steel pipes (6) are marked on the two long columns (302). After the pre-embedded bolt positioning assembly (5) is assembled in place, the transverse support steel pipes (6) are welded. The pre-embedded bolt positioning assembly (5) is hoisted as a whole onto the frame support inclined structure (4) using a crane, so that the top positioning steel plate (502) is closely fitted with the second I-beam (401) and channel steel (402) in the frame support inclined structure (4), thus completing the assembly of the pre-embedded bolt positioning assembly (5) with the frame support.

8. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 7, characterized in that, After the pre-embedded bolt positioning assembly device (5) and the frame support are assembled in step S5, an angle adjustment device is inserted between the transverse support steel pipe (6) and the long column (302) to adjust the pre-embedded bolt (501).

9. The method for measuring and installing large-diameter, long, inclined pre-embedded bolts according to claim 1, characterized in that, The long inclined side surface of the wedge-shaped iron block (7) is provided with an adjusting tooth plate (701), and the outer side of the transverse support steel pipe (6) is rotatably provided with an adjusting gear (601) that is compatible with the adjusting tooth plate (701). The surface of the transverse support steel pipe (6) is provided with a drive device for controlling the unidirectional rotation of the adjusting gear (601).

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