Device and method for adjusting concentricity of anchor bolt holes of double-layer column bottom plate

Abstract

The invention provides a device and method for adjusting concentricity of anchor bolt holes of a double-layer column bottom plate. The device comprises a base, an arc-shaped rail and an adjusting expansion mechanism. The arc-shaped track is arranged on the base, the multiple adjusting and expanding mechanisms are movably connected to the arc-shaped track, and each adjusting and expanding mechanism further comprises a diameter adjusting assembly, a mounting base, a driving mechanism, a moving mechanism and a limiting mechanism; the diameter adjusting assembly comprises a second driving piece and a positioning rod. The device is wide in application range, by adjusting the distance between the positioning rods, the positioning rods can abut against the inner walls of the corresponding bolt holes, then the double-layer column bottom plates are driven to move relatively, and the concentricity of the bolt holes of the double-layer column bottom plates is efficiently and accurately adjusted. The offset of the bolt hole of the double-layer column bottom plate can be accurately detected; the automation degree is high, the operation difficulty is reduced, and the efficiency and precision of mounting the double-layer column bottom plate are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure construction, and in particular relates to a device and a method for adjusting the concentricity of anchor bolt holes in a double-layer column bottom plate. Background Art

[0002] As more and more steel structures with frame structures appear in people's lives, the difficulty of making and installing steel structures is also increasing. When installing the double-layer column base plate, the concentricity of the bolt holes on the upper and lower base plates is very important for the smooth alignment and connection of the steel column and the anchor bolts. However, due to the large thickness of the column base plate, the cutting accuracy of the bolt holes is difficult to strictly control, and the deformation of the bolt holes caused by the welding process will eventually lead to deviations in the bolt holes when installing the upper and lower double-layer column base plates, affecting the installation effect. The existing technology usually uses a manual tape measure for measurement and adjustment. Although this method is relatively simple, its measurement accuracy is low, and it is difficult to achieve precise control during manual measurement. This not only affects the accuracy of measurement and adjustment, but also greatly increases the construction time and labor input. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a device and method for intelligently adjusting the concentricity of anchor bolt holes in a double-layer column base plate, which is easy to operate and has precise and efficient adjustment.

[0004] The technical solution adopted by the present invention is: a device for adjusting the concentricity of the anchor holes of the bottom plate of a double-layer column, comprising a base, an arc track and an adjusting and expanding mechanism; the arc track is arranged on the base, and a plurality of the adjusting and expanding mechanisms are movably connected to the arc track and can move along the arc track to align with the anchor holes of the bottom plate of the column; the adjusting and expanding mechanism includes a diameter adjusting component, and the shape and size of the diameter adjusting component can be adjusted to match the diameter of the anchor hole.

[0005] Furthermore, the adjustment and expansion mechanism also includes a mounting seat, a driving mechanism, a moving mechanism and a limiting mechanism; the diameter adjustment component is arranged at one end of the mounting seat, and the moving mechanism is fixed to the end of the mounting seat opposite to the diameter adjustment component through a pin shaft, and is rollingly connected to the top end surface of the arc track; the driving mechanism and the limiting mechanism are respectively arranged on both sides of the moving mechanism, and are movably connected to the two side end surfaces of the arc track.

[0006] Furthermore, the top end surface is provided with a limiting groove, and the limiting groove is adapted to the moving mechanism.

[0007] Furthermore, the driving mechanism includes a first driving member and a gear connected to the first driving member, and one side end surface of the arc track is provided with a toothed belt meshing with the gear; the limiting mechanism is embedded with a ball, and the ball is rollingly connected to the other side end surface of the arc track; the limiting mechanism is penetrated by a limiting pin.

[0008] Furthermore, the arc track is provided with a notch, so that the adjustment and expansion mechanism can be connected to the arc track through the notch.

[0009] Furthermore, the diameter adjustment assembly includes a second driving member and a positioning rod, the second driving member has two opposite driving ends, and the positioning rods are respectively vertically connected to the driving ends of the second driving member.

[0010] Furthermore, the toothed belt is arranged on the inner ring of the arc track, and the outer ring of the arc track is also provided with scale lines.

[0011] Furthermore, the base includes a rotating platform and an adjustment seat, the arc track is arranged on the rotating platform; the adjustment seat is provided with a rotating mechanism, and the rotating mechanism is connected to one end of the rotating platform to adjust the angle of the rotating platform relative to the adjustment seat.

[0012] Furthermore, the base is also provided with a control system, and the control system is electrically connected to the adjustment and expansion mechanism and the rotation mechanism respectively.

[0013] A method for adjusting the concentricity of an anchor bolt hole in a double-layer column bottom plate, using the device for adjusting the concentricity of an anchor bolt hole in a double-layer column bottom plate as described above, comprises the following steps:

[0014] The expansion mechanism is adjusted and installed on the arc track according to the number of anchor holes of the double-layer column bottom plate;

[0015] adjusting the angle of the rotating platform according to the posture of the double-layer column base plate;

[0016] Adjusting and fixing the position of the regulating expansion mechanism according to the relative position of the anchor bolt hole;

[0017] Put the double-layer column bottom plate into the adjustment and expansion mechanism;

[0018] Adjusting the distance between the positioning rods on the adjusting expansion mechanism so that they abut against the anchor bolt hole;

[0019] Welding the double-layer column bottom plate, and after welding, separating the double-layer column bottom plate from the device for adjusting the concentricity of the anchor bolt holes of the double-layer column bottom plate;

[0020] Removing some of the adjusting and expanding mechanisms until at least three adjusting and expanding mechanisms remain;

[0021] adjusting the positions of the remaining regulating and expanding mechanisms;

[0022] After welding, the double-layer column base plate is again put into the adjusting and expanding mechanism for concentricity detection.

[0023] The advantages and positive effects of the present invention are as follows: the device for adjusting the concentricity of the anchor bolt holes of the double-layer column bottom plate proposed in the present application has a wide range of applications. By adjusting the distance between the positioning rods, the inner wall of the corresponding bolt hole can be pressed against, thereby driving the relative movement between the double-layer column bottom plates, achieving concentric alignment of the bolt holes, and efficiently and accurately adjusting the concentricity of the bolt holes of the double-layer column bottom plates. At the same time, the bolt hole offset of the double-layer column bottom plate can also be accurately checked to provide a basis for subsequent adjustment work; the device has a high degree of automation, does not require operators to measure repeatedly, reduces the difficulty of operation, greatly improves the efficiency and accuracy of the installation of the double-layer column bottom plate, and ensures the installation quality of the double-layer column bottom plate during the installation of the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the structure of an adjustment and expansion mechanism of a specific embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the use of a specific embodiment of the present invention.

[0027] In the figure:

[0028] 1. Base 11, rotating platform 12, rotating mechanism

[0029] 121, rotating shaft 122, rotating arm 13, horizontal traverse mechanism

[0030] 14. Adjustment seat 2. Arc track 21. Limiting groove

[0031] 22. Toothed belt 23. Scale line 3. Adjustment expansion mechanism

[0032] 31. Moving mechanism 32. Driving mechanism 321. First driving member

[0033] 322, gear 33, limit mechanism 331, ball

[0034] 332, limit pin 34, diameter adjustment component 341, positioning rod

[0035] 342. Second driving member DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0037] The present invention proposes a device for adjusting the concentricity of the anchor holes of a double-layer column base plate, which is used for adjusting and detecting the concentricity of the bolt holes of the double-layer column base plate during the installation of the steel structure. Usually, the column base plate is arranged at the bottom of the steel column, and a plurality of bolt holes are evenly arranged along the circumference of the steel column, and the steel column is fixed to the ground by being aligned with the screws pre-buried in the ground; however, when the column base plate of the steel column adopts a double-layer column base plate, the double-layer column base plate needs to be welded first, and the bolt holes of the column base plate should be aligned during welding to ensure that the column base plate and the anchor bolts are smoothly aligned and connected; a device for adjusting the concentricity of the anchor holes of the double-layer column base plate proposed in the present application has a wide range of applications and can be flexibly adjusted according to the position and diameter of the bolt holes, so that the bolt holes of the double-layer column base plate are concentrically aligned; the efficiency and accuracy of the installation of the double-layer column base plate are greatly improved, and the installation quality of the double-layer column base plate during the installation of the steel structure is guaranteed.

[0038] like Figure 1 As shown, a device for adjusting the concentricity of the anchor holes of the bottom plate of a double-layer column comprises a base 1, an arc track 2 and an adjusting and expanding mechanism 3; the arc track 2 is arranged on the base 1, and a plurality of adjusting and expanding mechanisms 3 are movably connected to the arc track 2 and can move along the arc track 2 to align with the anchor holes of the bottom plate of the column; the adjusting and expanding mechanism 3 comprises a diameter adjusting component 34, and the shape and size of the diameter adjusting component 34 can be adjusted to match the diameter of the anchor hole.

[0039] The number of the above-mentioned adjustment and expansion mechanisms 3 is set according to the number and position of the bolt holes on the double-layer column base plate, and the position of the adjustment and expansion mechanism 3 on the arc track 2 can be adjusted according to the relative position between the bolt holes, so that each adjustment and expansion mechanism 3 can be aligned with the corresponding bolt hole and penetrate into the bolt hole; by adjusting the shape and size of the diameter adjustment component 34, each diameter adjustment component 34 can be pressed against the inner wall of the corresponding bolt hole, thereby driving the relative movement between the double-layer column base plates, realizing the concentric alignment of the bolt holes, and efficiently and accurately adjusting the concentricity of the bolt holes of the double-layer column base plate. At the same time, it can also be used to check the concentricity of the bolt holes of the double-layer column base plate. When adjusting the diameter adjustment component 34, if the size of part or all of the diameter adjustment components 34 cannot be consistent with the diameter of the bolt hole, it indicates that the concentricity of the bolt holes of the double-layer column base plate is insufficient; in addition, the offset of the bolt hole can also be judged according to the test results, providing a basis for subsequent adjustment work.

[0040] Normally, the bolt holes are evenly arranged around the steel column, and the cross-sectional shape of the steel column is generally circular or square. The shape of the arc track 2 in the present application is set according to the distribution of the screw holes on the column base plate. When the position of the adjustment and expansion mechanism 3 on the arc track 2 is adjusted, the adjustment and expansion mechanism 3 can be aligned with more than three bolt holes. Preferably, more than three screw holes are dispersed relative to the center of the column base plate, which can improve the accuracy of adjustment and inspection.

[0041] Furthermore, if Figure 2 As shown, the adjustment expansion mechanism 3 also includes a mounting seat, a driving mechanism 32, a moving mechanism 31 and a limiting mechanism 33; the adjustment component is arranged at one end of the mounting seat, and the moving mechanism 31 is fixed to the end of the mounting seat opposite to the diameter adjustment component 34 through a pin shaft, and is rollingly connected with one end face of the arc track 2; the driving mechanism 32 and the limiting mechanism 33 are respectively arranged on both sides of the moving mechanism 31; the driving mechanism 32 and the limiting mechanism 33 are respectively movably connected with the end faces of both sides of the arc track 2. By running the driving mechanism 32, the mounting seat and the adjustment component on the mounting seat can be driven to move along the arc track 2 to adjust the relative position between the expansion mechanism 3 so that it can be aligned with the bolt holes of the double-layer column bottom plate; by setting the limiting mechanism 33 opposite to the driving mechanism 32, the adjustment expansion mechanism 3 can be prevented from being separated from the arc track 2 during the movement, thereby achieving a good limiting effect.

[0042] The top end surface is provided with a limiting groove 21 , which is arranged along the length direction of the arc track 2 . The limiting groove 21 is matched with the moving mechanism 31 , so that the moving mechanism 31 can move along the limiting groove 21 .

[0043] The above-mentioned driving mechanism 32 includes a first driving member 321 and a gear 322 connected to the first driving member 321. One of the side end faces of the arc track 2 is provided with a toothed belt 22 meshing with the gear 322, so that the gear 322 can move along the toothed belt 22 under the drive of the first driving member 321; the limiting mechanism 33 is embedded with a ball 331, and the ball 331 is rollingly connected to the other side end face of the arc track 2, and cooperates with the gear 322 to stably fix the base 1 on the arc track 2 to prevent it from deviating to the two sides of the arc track 2; the limiting mechanism 33 is penetrated by a limiting pin 332, preferably, the limiting pin 332 is threadedly connected to the limiting mechanism 33, and by screwing the limiting pin 332 to make it close to the side end face of the arc track 2, the base 1 can be fixed to the set position of the arc track 2 to prevent it from moving during adjustment and inspection.

[0044] In a specific embodiment, grooves are respectively provided on the two side end faces of the arc track 2, the toothed belt 22 is arranged in the groove, and the limit pin 332 is arranged at the position of the limit mechanism 33 corresponding to the groove. In the process of adjusting the movement of the expansion mechanism 3, the limit pin 332 extends into the groove and does not contact it, and cooperates with the gear 322 to achieve further limiting, thereby preventing the base 1 from moving away from the top end surface of the arc track 2 and disengaging; but when the base 1 needs to be fixed, the base 1 can be fixed to the arc track 2 by screwing the limit pin 332 against the groove.

[0045] In the present application, the shape and size of the diameter adjustment component 34 are adjusted to press against the inner wall of the corresponding bolt hole; in a specific embodiment, the above-mentioned diameter adjustment component 34 includes a second driving member 342 and a positioning rod 341, the second driving member 342 has two opposite driving ends, and the positioning rods 341 are respectively vertically connected to the driving ends of the second driving member 342, and are driven by the second driving member 342 to approach or move away from each other; specifically, the cross-section of the above-mentioned positioning rods 341 is preferably circular or semicircular, and when the two positioning rods 341 approach each other, the distance between the farthest ends of the enclosed shape is the minimum diameter, and the minimum diameter is smaller than the diameter of the bolt hole on the bottom plate of the double-layer column to be adjusted or inspected, so that the two positioning rods 341 can penetrate into the bolt hole; when the two positioning rods 341 move away from each other, the distance between the farthest ends of the enclosed shape gradually increases until it is the same as the diameter of the bolt hole, and the bolt hole can be pressed against.

[0046] In the present application, the arc track 2 is provided with a notch so that the adjustable expansion mechanism 3 can be connected to the arc track 2 through the notch, so as to adjust the number of adjustable expansion mechanisms 3 according to the number of bolt holes, and prevent the redundant adjustable expansion mechanisms 3 from affecting the use of the device.

[0047] Preferably, the toothed belt 22 in the present application is arranged on the inner ring of the arc track 2, and the outer ring of the arc track 2 is also provided with a scale line 23. The operator can adjust the position of the expansion mechanism 3 according to the scale value to make it match the relative position of the bolt hole of the double-layer column base plate; the operator can also check whether the position of the expansion mechanism 3 is accurate according to the scale value of the position of the expansion mechanism 3.

[0048] Furthermore, the base 1 includes a rotating platform 11 and an adjusting seat 14, and the arc track 2 is arranged on the rotating platform 11; the adjusting seat 14 is provided with a rotating mechanism 12, and the rotating mechanism 12 is connected to one end of the rotating platform 11 to adjust the angle of the rotating platform 11 relative to the adjusting seat 14. Through the action of the rotating mechanism 12, the rotating platform 11 can be set in the horizontal direction or the vertical direction to adapt to the double-layer column base plate set in the horizontal direction or the double-layer column base plate set in the vertical direction.

[0049] Specifically, the rotating mechanism 12 includes a rotating drive member, a rotating shaft 121 and a rotating arm 122. One end of the rotating arm 122 is connected to one end of the rotating platform 11, and the other end of the rotating arm 122 is connected to the rotating shaft 121. The rotating shaft 121 is connected to the driving end of the rotating drive member and can rotate under the drive of the rotating drive member to adjust the angle of the rotating platform 11 relative to the adjustment seat 14 to adapt to the posture during the processing and manufacturing of the double-layer column base plate.

[0050] Furthermore, the base 1 is also provided with a horizontal transverse mechanism 13, which is provided with a transverse guide rail and a transverse driving member, and the direction of the transverse guide rail is the same as the extension direction of the positioning rod 341 when the rotating platform 11 is arranged in the vertical direction; the rotating mechanism 12 is arranged at the driving end of the horizontal transverse mechanism 13, and can move along the transverse guide rail under the drive of the horizontal transverse mechanism 13, so as to drive the positioning rod 341 to leave the bolt hole of the double-layer column bottom plate after the adjustment or detection is completed. Preferably, the transverse driving member adopts a cylinder, and the structure of the horizontal transverse mechanism 13 is a prior art, which will not be described in detail here.

[0051] Preferably, the base 1 is also provided with a control system, and the control system is electrically connected to the adjustment and expansion mechanism 3 and the rotation mechanism 12 respectively.

[0052] The present application also proposes a method for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate, which adopts the device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate proposed in the present application, and specifically comprises the following steps:

[0053] S1, installing and adjusting the expansion mechanism 3 on the arc track 2 according to the number of anchor bolt holes of the double-layer column bottom plate;

[0054] Specifically, according to the radius of the arc track 2 and the distance between the bolt holes on the double-layer column base plate, three or more dispersed bolt holes are selected as adjustment objects, and then a corresponding number of adjustment expansion mechanisms 3 are installed on the arc track 2 from the notch of the arc track 2, and the limit pin 332 is adjusted to extend into the groove on one side end face of the arc track 2 without contacting the groove.

[0055] S2, adjusting the angle of the rotating platform 11 according to the posture of the double-layer column bottom plate;

[0056] During the adjustment operation, the double-layer column base plate is temporarily fixed in the vertical direction or in the horizontal direction. According to its different postures, the rotating platform 11 is adjusted through the control system so that it is also set in the vertical direction or in the horizontal direction.

[0057] S3, adjusting the position of the expansion mechanism 3 according to the relative position of the anchor bolt hole and fixing it;

[0058] Specifically, according to the relative positions between the selected bolt holes, the position data and diameter data are imported into the control system, and the position of the adjusting and expanding mechanism 3 is adjusted by the control system so that the relative positions between the adjusting and expanding mechanism 3 are the same as the relative positions between the bolt holes, and then the adjusting and expanding mechanism 3 is fixed to the arc track 2 by screwing the limit pin 332; then the device is moved as a whole to a position corresponding to the double-layer column base plate, so that the rotating platform 11 is parallel to the double-layer column base plate and maintains a set distance from the double-layer column base plate, and the positioning rods 341 are respectively aligned with the bolt holes.

[0059] S4, inserting the double-layer column bottom plate into the adjustment expansion mechanism 3;

[0060] In the present application, according to actual needs, the double-layer column base plate can be moved and the device can also be moved so that the positioning rod 341 of each adjustment and expansion mechanism 3 passes through a corresponding bolt hole.

[0061] S5, adjusting the distance between the positioning rods 341 on the expansion mechanism 3 so that they abut against the anchor bolt hole;

[0062] The control system controls the operation of the second driving member so that the positioning rods 341 on the same adjusting expansion mechanism 3 move away from each other until the distance between the farthest ends of the shape enclosed by the positioning rods 341 is the same as the bolt hole diameter preset in the control system; in this process, the double-layer column base plates are displaced relative to each other under the drive of the positioning rods 341 until the bolt holes on the two column base plates are concentrically aligned.

[0063] S6, welding the double-layer column bottom plate, separating the double-layer column bottom plate after welding, and a device for adjusting the concentricity of the anchor bolt holes of the double-layer column bottom plate;

[0064] In the present application, the double-layer column bottom plate can be removed or the device can be removed as needed. In the present embodiment, the concentricity of the bolt holes of the double-layer column bottom plate needs to be checked after welding is completed, so after welding is completed, the device for adjusting the concentricity of the anchor bolt holes of the double-layer column bottom plate is first removed.

[0065] In a specific embodiment, Figure 3 As shown, the double-layer column base plate is arranged in the vertical direction, and the rotating platform 11 is also arranged in the vertical direction; when the double-layer column base plate is welded, the horizontal lateral movement mechanism 13 is controlled by the control system to operate, so that the rotating platform 11 drives the positioning rod 341 to move away from the bolt hole to leave the bolt hole; in subsequent inspection operations, there is no need to adjust the position of the device again to simplify the operation.

[0066] S7, removing some of the adjusting and expanding mechanisms 3 until at least three adjusting and expanding mechanisms 3 remain;

[0067] Several adjusting and expanding mechanisms 3 are removed from the notches of the arc-shaped track 2, and at least three adjusting and expanding mechanisms 3 are retained for the detection operation.

[0068] S8, adjusting the position of the remaining adjustment expansion mechanism 3;

[0069] A bolt hole is selected as the detection object, and the relative position of the adjusting and expanding mechanism 3 is adjusted again according to the relative position of the detection object, so that the positioning rod 341 of each adjusting and expanding mechanism 3 is aligned with a bolt hole. Preferably, a bolt hole different from that in the adjustment operation is selected as the detection object, or at least it is ensured that the bolt hole aligned with the adjusting and expanding mechanism 3 in the adjustment operation is not the same as the bolt hole aligned in the detection operation.

[0070] S9, the double-layer column base plate after welding is put into the adjusting expansion mechanism 3 again to perform concentricity detection.

[0071] The operation method of this step is the same as that in step S5; when the positioning rod 341 is adjusted to move away, when the distance between the farthest ends of the positioning rods 341 of some or all of the diameter adjustment components 34 cannot be consistent with the diameter of the bolt hole, it indicates that the concentricity of the bolt hole of the double-layer column base plate is insufficient; in addition, the offset of the bolt hole can also be judged according to the detection results, providing a basis for subsequent adjustment work.

[0072] The device for adjusting the concentricity of the anchor bolt holes of the double-layer column bottom plate proposed in this application has a wide range of applications. By adjusting the distance between the positioning rods, the inner wall of the corresponding bolt hole can be pressed against, thereby driving the relative movement between the double-layer column bottom plates, achieving concentric alignment of the bolt holes, and efficiently and accurately adjusting the concentricity of the bolt holes of the double-layer column bottom plates. At the same time, the bolt hole offset of the double-layer column bottom plate can also be accurately checked to provide a basis for subsequent adjustment work; the high degree of automation does not require operators to repeatedly measure, which reduces the difficulty of operation, greatly improves the efficiency and accuracy of the installation of the double-layer column bottom plate, and ensures the installation quality of the double-layer column bottom plate during the installation of the steel structure.

[0073] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A device for adjusting the concentricity of anchor bolt holes in double-layer column bottom plates, characterized in that: It includes a base, an arc track and an adjustment and expansion mechanism; the arc track is arranged on the base, and a plurality of the adjustment and expansion mechanisms are movably connected to the arc track and can move along the arc track to align with the anchor hole of the column base plate; the adjustment and expansion mechanism includes a diameter adjustment component, and the shape and size of the diameter adjustment component can be adjusted to match the diameter of the anchor hole.

2. The device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate according to claim 1 is characterized in that: The adjustment and expansion mechanism also includes a mounting seat, a driving mechanism, a moving mechanism and a limiting mechanism; the diameter adjustment component is arranged at one end of the mounting seat, and the moving mechanism is fixed to the end of the mounting seat opposite to the diameter adjustment component through a pin shaft, and is rollingly connected to the top end surface of the arc track; the driving mechanism and the limiting mechanism are respectively arranged on both sides of the moving mechanism, and are movably connected to the two side end surfaces of the arc track.

3. The device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate according to claim 2 is characterized in that: The top end surface is provided with a limiting groove, and the limiting groove is adapted to the moving mechanism.

4. The device for adjusting the concentricity of the anchor bolt hole in the bottom plate of a double-layer column according to claim 2 or 3, characterized in that: The driving mechanism includes a first driving member and a gear connected to the first driving member, and one side end face of the arc track is provided with a toothed belt meshing with the gear; the limiting mechanism is embedded with a ball, and the ball is rollingly connected to the other side end face of the arc track; the limiting mechanism is penetrated by a limiting pin.

5. The device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate according to claim 4 is characterized in that: The arc track is provided with a notch, so that the adjustment expansion mechanism can be connected to the arc track through the notch.

6. The device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate according to claim 5 is characterized in that: The diameter adjustment assembly includes a second driving member and a positioning rod. The second driving member has two opposite driving ends. The positioning rods are respectively vertically connected to the driving ends of the second driving member.

7. The device for adjusting the concentricity of the anchor bolt hole in the bottom plate of a double-layer column according to claim 5 or 6, characterized in that: The toothed belt is arranged on the inner ring of the arc track, and the outer ring of the arc track is also provided with scale lines.

8. The device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate according to claim 7 is characterized in that: The base comprises a rotating platform and an adjusting seat, the arc track is arranged on the rotating platform; the adjusting seat is provided with a rotating mechanism, and the rotating mechanism is connected to one end of the rotating platform to adjust the angle of the rotating platform relative to the adjusting seat.

9. The device for adjusting the concentricity of the anchor bolt hole of the double-layer column bottom plate according to claim 8 is characterized in that: The base is also provided with a control system, and the control system is electrically connected to the regulating and expanding mechanism and the rotating mechanism respectively.

10. A method for adjusting the concentricity of anchor bolt holes in double-layer column bottom plates, characterized in that: The device for adjusting the concentricity of the anchor bolt hole in the bottom plate of a double-layer column as claimed in any one of claims 1 to 9 comprises the following steps: The expansion mechanism is installed and adjusted on the arc track according to the number of anchor bolt holes of the double-layer column bottom plate; adjusting the angle of the rotating platform according to the posture of the double-layer column base plate; Adjusting and fixing the position of the regulating expansion mechanism according to the relative position of the anchor bolt hole; Put the double-layer column bottom plate into the adjustment and expansion mechanism; Adjusting the distance between the positioning rods on the adjusting expansion mechanism so that they abut against the anchor bolt hole; Welding the double-layer column bottom plate, and after welding, separating the double-layer column bottom plate from the device for adjusting the concentricity of the anchor bolt holes of the double-layer column bottom plate; Removing some of the adjusting and expanding mechanisms until at least three adjusting and expanding mechanisms remain; adjusting the positions of the remaining regulating and expanding mechanisms; After welding, the double-layer column base plate is again put into the adjusting and expanding mechanism for concentricity detection.

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