Large-span steel structure assembly device and construction method thereof

Abstract

The present invention relates to the field of steel structure construction, and in particular to a large-span steel structure assembling device and a construction method thereof. The large-span steel structure assembling device comprises a hoisting mechanism, an assembling cradle, a clamping mechanism, a lifting mechanism, a fine-tuning mechanism and a sliding mechanism. The large-span steel structure is pre-assembled by the assembling device of the present invention and transported to a factory for assembly, thereby greatly reducing the construction period. The large-span steel structure is moved to a specified position by the cooperation of the fine-tuning mechanism and the lifting mechanism, and then four cradle columns and steel columns are leveled, so that the bottom plates of the four steel columns of the pre-assembled large-span steel structure can abut against a concrete base at the same time, thereby avoiding the problem of inaccurate installation caused by the height difference of the four large-span steel structures and the impact of a hydraulic jack on the concrete base caused by a large drop.

Description

Technical Field

[0001] The invention relates to the field of steel structure building construction, and in particular to a large-span steel structure assembling device and a construction method thereof. Background Art

[0002] Large-span steel structures are increasingly widely used in the construction field. In order to improve construction efficiency, the overall pre-assembly hoisting technology has received widespread attention and research. In the construction of existing pre-assembled large-span steel structures, after the large-span steel structure is moved to the designated position, the large-span steel structure undergoes slight deformation caused by the hoisting and the difficulty in controlling the hoisting level is very great, resulting in inconsistent height differences among the steel columns of the large-span steel structure before descent. The existing lifting mechanism or hoisting mechanism is unable to accurately control the lifting and lowering stroke. The pre-assembled steel structure as a whole has inconsistent height differences, which will cause the steel column base plate to tilt. The bolt mounting holes of the concrete base may not be able to accurately pass through the mounting holes of the steel column base plate, and the steel column will have an impact on the concrete base when it descends. In view of this, this case arises. Summary of the invention

[0003] An object of the present invention is to solve at least the above-mentioned problems through a large-span steel structure assembly device and a construction method thereof.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a large-span steel structure assembly device, comprising:

[0005] The lifting mechanism is used to lift the steel columns and beams to the designated positions on the assembly frame;

[0006] Assembly cradle, used to pre-assemble steel columns and beams into long-span steel structures;

[0007] A clamping mechanism, used for clamping and positioning the steel column, wherein the clamping mechanism is arranged on the side of the assembly frame;

[0008] Lifting mechanism, used to raise or lower the height of the assembly frame and pre-assembled large-span steel structure;

[0009] Fine-tuning mechanism, used to fine-tune the height of the assembled frame and pre-assembled large-span steel structure;

[0010] and a sliding mechanism for driving the assembly frame and the pre-assembled large-span steel structure to move to a designated position in the site, the fine-adjustment mechanism is arranged at the bottom of the assembly frame, and the lifting mechanism is arranged between the fine-adjustment mechanism and the sliding mechanism.

[0011] Preferably, the assembled tire frame includes tire frame columns located on both sides and a tire frame crossbeam for connecting the tire frame columns on both sides.

[0012] Preferably, the clamping mechanism includes a support plate, a positioning movable plate, a positioning hydraulic cylinder, a positioning guide rod and a positioning bracket. The support plate is fixedly mounted at the bottom of the tire frame column and is used to support the corbel of the steel column. The positioning bracket is fixedly mounted on the tire frame column. The positioning hydraulic cylinder is fixedly mounted on the positioning bracket. The positioning guide rod is slidably mounted on the positioning bracket. The positioning movable plate is fixedly connected to the piston rod end of the positioning hydraulic cylinder and the end of the positioning guide rod.

[0013] Preferably, the sliding mechanism includes a sliding guide rail and a sliding seat slidably disposed on the sliding guide rail.

[0014] Preferably, the lifting mechanism includes a hydraulic pusher, a lifting guide column, a lifting guide seat and a lifting top plate, the hydraulic pusher is arranged between the lifting top plate and the sliding seat, the lifting guide column and the lifting guide seat are slidably matched, the top end of the lifting guide column is fixed on the lifting top plate, and the lifting guide seat is fixed on the sliding seat.

[0015] Preferably, the fine-tuning mechanism includes an upper fixed wedge block, a lower movable wedge block, a fine-tuning base, a worm, a turbine, a servo motor, a longitudinal displacement sensor, a wedge displacement sensor and a base displacement sensor, the upper fixed wedge block and the lower movable wedge block have inclined surfaces with the same inclination and fitting each other, the upper fixed wedge block is fixed to the bottom of the tire frame column, the fine-tuning base is fixed to the upper end surface of the lifting top plate, the fine-tuning base is provided with a fine-tuning dovetail groove, the bottom of the lower movable wedge block is provided with a fine-tuning dovetail protrusion that slides with the fine-tuning dovetail groove, the turbine is fixed to the fine-tuning base, the worm cooperates with the turbine and is driven to rotate by the servo motor, the longitudinal displacement sensor is arranged on the lifting top plate to detect the distance between the lifting top plate and the bottom plate of the tire frame column, the wedge displacement sensor is arranged on the servo motor to detect the lateral displacement distance of the lower movable wedge, and the base displacement sensor is fixed to the lower end surface of the support plate to detect the distance between the support plate and the concrete base.

[0016] Preferably, the hoisting mechanism includes a hoisting track, a gantry slidably arranged on the hoisting track, and two hoists slidably arranged on the main beam on the gantry.

[0017] Preferably, the assembled tire frame also includes a manual installation platform and a platform moving mechanism fixed to the top of the tire frame column, the manual installation platform includes a U-shaped platform fixed to the tire frame column and a flip platform rotatably arranged at the two ends of the U-shaped platform, and when the two flip platforms are flipped down, they are spliced ​​with the U-shaped platform to form a circular manual installation platform surrounding the tire frame column and the steel column, and the platform moving mechanism includes a platform support frame fixed to the tire frame column and a screw slide arranged on the platform support frame, and the manual installation platform is fixedly connected to the sliding seat of the screw slide.

[0018] The construction method of the large-span steel structure assembly device comprises the following steps:

[0019] Step a: The assembling tire frame is at the pre-installation station, and the steel column is lifted to the concrete base beside the tire frame column by a lifting mechanism, and the bottom of the steel column is connected to the bolt of the concrete base by a nut;

[0020] Step b, lifting the tire frame column to a specified height through the fine-tuning mechanism, placing the corbel on the support plate and fitting it to the steel column, and welding the corbel to the steel column;

[0021] Step c, clamping the corbel by a clamping mechanism;

[0022] Step d: Use a lifting mechanism to lift the steel beam to the top of the steel column, and fix the steel column and the steel beam to obtain a pre-assembled large-span steel structure;

[0023] Step e: Unscrew the nut at the bottom of the steel column, and lift the frame column and the large-span steel structure through the lifting mechanism, so that the bottom plate of the steel column leaves the concrete base;

[0024] Step f, moving the pre-assembled large-span steel structure to a designated location within the factory through a sliding mechanism;

[0025] Step g, adjusting the height of each steel column from the concrete base to be consistent through a fine-tuning mechanism;

[0026] Step h, driving the steel column down through the lifting mechanism and the fine-adjusting mechanism until the bottom plate of the steel column abuts against the concrete base, and the bottom of the steel column is connected to the bolts of the concrete base through nuts;

[0027] Step i, the clamping mechanism releases the clamping of the corbel, and the assembly frame is driven down by the fine-tuning mechanism, so that the support plate is separated from the corbel;

[0028] Step j: Move the assembly frame to the pre-assembly station through the sliding mechanism.

[0029] Preferably, in step b, the hydraulic pusher of the lifting mechanism is at the lowest point of the stroke, and in the fine-tuning mechanism, the servo motor drives the worm to rotate, and through the transmission of the worm gear, drives the lower movable wedge to move laterally, thereby driving the upper fixed wedge and the support plate to rise until the support plate reaches the specified position;

[0030] In the step c, the positioning movable plate is driven by the positioning hydraulic cylinder to move downward until it abuts against the top surface of the corbel of the steel column to clamp and position it;

[0031] In step g, the current height of each steel column is measured by the base displacement sensor, and the servo motor drives the movable wedge to fine-tune the steel column to the specified height.

[0032] From the above description, it can be seen that the large-span steel structure assembly device and the construction method provided by the present invention have the following beneficial effects: the large-span steel structure is pre-assembled by the assembly device of the present invention and transported to the factory for assembly, which greatly reduces the construction period; after the large-span steel structure is moved to the specified position through the cooperation of the fine-tuning mechanism and the lifting mechanism, the four frame columns and steel columns are leveled, so that the bottom plates of the four steel columns of the pre-assembled large-span steel structure can simultaneously abut the concrete base, avoiding the problem of inaccurate installation caused by the height difference of the four large-span steel structures, and the impact of the hydraulic thruster on the concrete base due to a sharp drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the large-span steel structure assembling device of the present invention.

[0034] Figure 2 for Figure 1 A magnified schematic diagram of a local area.

[0035] Figure 3 for Figure 1 main view.

[0036] Figure 4 for Figure 3 b is a partial enlarged schematic diagram of . DETAILED DESCRIPTION

[0037] The present invention is further described below through specific implementation modes.

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] like Figure 1 and 2 As shown, the large-span steel structure assembly device of the present invention comprises:

[0040] The hoisting mechanism 1 is used to lift the steel column 71 and the steel beam 72 to the designated position on the assembly frame 2;

[0041] An assembly frame 2 is used to pre-assemble steel columns 71 and steel beams 72 into a large-span steel structure;

[0042] The clamping mechanism 3 is used to clamp and position the steel column 71, and the clamping mechanism 3 is arranged on the side of the assembled tire frame 2;

[0043] A lifting mechanism 4 is used to raise or lower the height of the assembly frame 2 and the pre-assembled large-span steel structure;

[0044] A fine-adjustment mechanism 5 is used to fine-adjust the height of the assembled tire frame 2 and the pre-assembled large-span steel structure;

[0045] and a sliding mechanism 6, which are used to drive the assembly frame 2 and the pre-assembled large-span steel structure to move to a designated position in the site; the fine-adjustment mechanism 5 is arranged at the bottom of the assembly frame 2, and the lifting mechanism 4 is arranged between the fine-adjustment mechanism 5 and the sliding mechanism 6.

[0046] The assembly tire frame 2 includes tire frame columns 21 located on both sides and tire frame cross beams 22 for connecting the tire frame columns 21 on both sides. The sizes of the tire frame columns 21 and the tire frame cross beams 22 match the span and height of the large-span steel structure, and the number of tire frame columns 21 is adjusted according to the number of frames of the large-span steel structure pre-assembled in a single time. For example, the attached figure of the present invention shows a steel structure pre-assembled in two frames, so the assembly tire frame 2 adapted thereto has four tire frame columns 21 for fixing and supporting the steel columns 71 of the large-span steel structure. The tire frame columns 21 on both sides of the same frame are connected by the tire frame cross beams 22, and the tire frame columns 21 on the same side of different frames are connected by the tire frame cross beams 22, so that the entire assembly tire frame 2 forms a whole. During pre-assembly, the steel column 71 is temporarily fixed to the side of the tire frame column 21, and the steel beam 72 is installed between the top ends of the two steel columns 71 through the hoisting mechanism 1.

[0047] like Figure 2 and 4The clamping mechanism 3 includes a support plate 31, a positioning movable plate 32, a positioning hydraulic cylinder 33, a positioning guide rod 34 and a positioning bracket 35. The support plate 31 is fixedly mounted at the bottom of the tire frame column 21 and is used to support the corbel 711 of the steel column 71. The positioning bracket 35 is fixedly mounted on the tire frame column 21. The positioning hydraulic cylinder 33 is fixedly mounted on the positioning bracket 35. The positioning guide rod 34 is slidably mounted on the positioning bracket 35. The positioning movable plate 32 is fixedly connected to the piston rod end of the positioning hydraulic cylinder 33 and the end of the positioning guide rod 34. The positioning movable plate 32 is relatively arranged above the supporting plate 31, and there is a space between the two for clamping the bracket 711 of the steel column 71. When the steel column 71 is hoisted to the side of the tire frame column 21, the bottom of the steel column 71 abuts against the concrete base 8, and the positioning bolts on the concrete base 8 pass through the mounting holes of the bottom plate of the steel column 71. The positioning nuts are installed on the positioning bolts on the concrete base 8 to temporarily fasten the steel column 71 to ensure the safety of the steel structure splicing construction. The bracket 711 is placed on the supporting plate 31, and the side of the bracket 711 abuts against the steel column 71. The function of the corbel 711 is to lift the entire steel structure through the corbel 711 when the steel structure is subsequently moved, so that it can slide; the positioning movable plate 32 is driven by the positioning hydraulic cylinder 33 to approach the corbel 711 of the steel column 71, and clamp the corbel 711 between the support plate 31 and the positioning movable plate 32. Furthermore, a positioning protrusion is provided on the corbel 711, and the positioning movable plate 32 is provided with a through hole that matches the shape of the positioning protrusion. When the positioning movable plate 32 approaches the corbel 711, the positioning protrusion passes through the through hole to limit the corbel 711.

[0048] like Figure 2 and 4 The sliding mechanism 6 includes a sliding guide rail 61 and a sliding seat 62 slidably arranged on the sliding guide rail 61. A guide wheel is provided at the bottom of the sliding seat 62, and the guide wheel is driven by a motor to drive the assembly frame 2 and the large-span steel structure to move along the sliding guide rail 61. The sliding guide rail 61 extends from the pre-assembly station to the factory area.

[0049] like Figure 2 and 4The lifting mechanism 4 includes a hydraulic jack 41, a lifting guide column 42, a lifting guide seat 43 and a lifting top plate 44. The hydraulic jack 41 is arranged between the lifting top plate 44 and the sliding seat 62. The lifting guide column 42 and the lifting guide seat 43 are slidably matched. The top of the lifting guide column 42 is fixed on the lifting top plate 44, and the lifting guide seat 43 is fixed on the sliding seat 62. The hydraulic jack 41 adopts a hydraulic jack. The lifting guide column 42 and the lifting guide seat 43 can be arranged in four groups and distributed on the four corners of the lifting top plate 44 to limit the lifting top plate 44 to move only in the longitudinal direction. The lifting top plate 44 is lifted and lowered under the drive of the hydraulic jack 41. When the hydraulic jack 41 is lifted, the bracket 711 is lifted through the support plate 31, thereby driving the entire pre-assembled large-span steel structure to be lifted. The stroke of the lifting mechanism 4 is 15-20 cm. It has a large stroke to ensure that the bottom plate of the steel column 71 can be separated from the positioning bolts of the concrete base 8 during lifting.

[0050] like Figure 2 and 4The fine-tuning mechanism 5 includes an upper fixed wedge block 51, a lower movable wedge block 52, a fine-tuning base 53, a worm 54, a turbine, a servo motor 55, a longitudinal displacement sensor 56, a wedge displacement sensor 57 and a base displacement sensor 58. A longitudinal guide structure is provided between the lifting top plate 44 and the bottom plate of the tire frame column 21, including a guide rod and a guide seat that slides with the guide rod to limit the lifting top plate 44 and the bottom plate of the tire frame column 21 to only move relative to each other in the longitudinal direction. The upper fixed wedge block 51 and the lower movable wedge block 52 have inclined surfaces with the same inclination and fit each other. The upper fixed wedge block 51 is fixed to the bottom of the tire frame column 21. The fine-tuning base 53 is fixed to the upper end surface of the lifting top plate 44. A fine-tuning dovetail groove is provided on 53, and a fine-tuning dovetail protrusion that slides with the fine-tuning dovetail groove is provided at the bottom of the lower movable wedge block 52. The dovetail groove structure allows the lower movable wedge block 52 to move only in the lateral direction. The turbine is fixed on the fine-tuning base 53, and the worm 54 cooperates with the turbine and is driven to rotate by the servo motor 55. The longitudinal displacement sensor 56 is arranged on the lifting top plate 44 to detect the distance between the lifting top plate 44 and the bottom plate of the tire frame column 21. The wedge block displacement sensor 57 is arranged on the servo motor 55 to detect the lateral displacement distance of the lower movable wedge block 52. The base displacement sensor 58 is fixed on the lower end surface of the support plate 31 to detect the distance between the support plate 31 and the concrete base 8.The lower movable wedge block 52 is slidably arranged on the fine-tuning base 53, and the servo motor 55 drives the worm 54 to rotate. Through the transmission of the worm gear 54, the rotational motion of the servo motor 55 is converted into the lateral movement of the lower movable wedge block 52. Since the inclined surfaces of the upper fixed wedge block 51 and the lower movable wedge block 52 fit together, the lateral movement of the lower movable wedge block 52 is converted into the longitudinal movement of the upper fixed wedge block 51 and the large-span steel structure. The angle of the inclined surfaces of the upper fixed wedge block 51 and the lower movable wedge block 52 is 8-12 degrees. Therefore, when the lateral movement of the lower movable wedge block 52 is converted into the longitudinal movement of the upper fixed wedge block 51, the movement range is reduced. In addition, the servo motor 55 accurately controls the rotation speed, and the displacement sensor detects the distance, so the longitudinal displacement of the entire large-span steel structure can be accurately controlled. The worm gear has a self-locking function. When the servo motor 55 stops rotating, the upper fixed wedge block 51 and The lower movable wedge block 52 does not move relative to each other, and the lifting top plate 44 and the sliding seat 62 remain unchanged; since the hydraulic pusher 41 cannot accurately control the stroke, the pre-assembled steel structure as a whole has inconsistent height differences, which will cause the bottom plate of the steel column 71 to tilt, and the bolt mounting holes of the concrete base may not be able to accurately pass through the mounting holes of the bottom plate of the steel column 71, and the steel column 71 will impact the concrete base. The present invention cooperates with the lifting mechanism 4 through the fine-tuning mechanism 5 to move the large-span steel structure to the specified position, and then level the four tire frame columns 21 and the steel column 71, so that the bottom plate mounting holes of the four steel columns 71 of the pre-assembled large-span steel structure can be installed on the mounting bolts of the concrete base 8 at the same time, avoiding the problem of inaccurate installation caused by the height difference of the four large-span steel structures and the impact of the hydraulic pusher 41 on the concrete base 8 due to a sharp drop.

[0051] like Figure 1 and 3 The hoisting mechanism 1 is arranged on the pre-assembly station of the large-span steel structure. The hoisting mechanism 1 includes a hoisting track 11, a gantry 12 slidably arranged on the hoisting track 11, and two hoists 13 slidably arranged on the main beam on the gantry 12. The legs of the gantry 12 are located on the outside of the tire frame columns 21 of the assembly tire frame 2, and the main beam of the gantry 12 is located above the tire frame cross beam 22 of the tire frame columns 21. The gantry 12 moves along the hoisting track 11 to lift the steel column 71 and the steel beam 72 of the steel structure to the specified position. When lifting the steel column 71, a single hoist 13 is used for hoisting, and when lifting the steel beam 72, two hoists 13 are used to cooperate synchronously, so that the steel beam 72 is assembled to the top of the steel column 71 stably.

[0052] The assembled tire frame 2 also includes an artificial installation platform 23 and a platform moving mechanism 24 fixedly mounted on the top of the tire frame column 21. The artificial installation platform 23 includes a U-shaped platform fixedly mounted on the tire frame column 21 and a flipping platform rotatably mounted on the two ends of the U-shaped platform. When the two flipping platforms are flipped down, they are spliced ​​with the U-shaped platform to form a circular artificial installation platform 23 surrounding the tire frame column 21 and the steel column 71. The platform moving mechanism 24 includes a platform support frame fixedly mounted on the tire frame column 21 and a screw slide set on the platform support frame. The artificial installation platform 23 is fixedly connected to the sliding seat of the screw slide. The ends of the flip platform and the U-shaped platform are hinged. Before the steel column 71 is hoisted to the tire frame column 21, the flip platform needs to be flipped up and opened so that the column can approach the tire frame column 21 from the gap of the U-shaped platform. When the steel column 71 is fixed to the tire frame column 21, the two flip platforms are flipped down and spliced ​​to form a U-shaped corridor, which is convenient for workers to splice and install the steel beam 72 and the steel column 71. In addition, the tire frame column 21 is provided with a ladder connected to the manual installation platform 23; the manual installation platform 23 is set on the platform support frame through guide rail sliding, and moves under the drive of the screw slide, so as to move away from or close to the tire frame column 21. After the large-span steel structure is pre-installed on the assembly tire frame 2, the screw slide drives the manual installation platform 23 to move inward, so that the manual installation platform 23 is away from the steel column 71, and will not interfere with each other when the assembly tire frame 2 and the large-span steel structure are separated.

[0053] The construction method of the large-span steel structure assembly device comprises the following steps:

[0054] Step a: The tire frame 2 is at the pre-installation station, and the steel column 71 is lifted to the concrete base 8 beside the tire frame column 21 by the lifting mechanism 1, and the bottom of the steel column 71 is connected to the bolt of the concrete base 8 by a nut;

[0055] Step b, lifting the tire frame column 21 to a specified height through the fine adjustment mechanism 5, placing the corbel 711 on the support plate 31 and fitting it with the steel column 71, and welding the corbel 711 to the steel column 71;

[0056] Step c, clamping the corbel 711 by the clamping mechanism 3;

[0057] Step d: Use the hoisting mechanism 1 to lift the steel beam 72 to the top of the steel column 71, and fix the steel column 71 and the steel beam 72 to obtain a pre-assembled large-span steel structure;

[0058] Step e: unscrew the nut at the bottom of the steel column 71, and lift the tire frame column 21 and the large-span steel structure through the lifting mechanism 4, so that the bottom plate of the steel column 71 leaves the concrete base 8;

[0059] Step f, moving the pre-assembled large-span steel structure to a designated location within the factory through the sliding mechanism 6;

[0060] Step g, adjusting the height of each steel column 71 from the concrete base 8 to be consistent through the fine adjustment mechanism 5;

[0061] Step h, driving the steel column 71 down through the lifting mechanism 4 and the fine-tuning mechanism 5 until the bottom plate of the steel column 71 abuts against the concrete base 8, and the bottom of the steel column 71 is connected to the bolts of the concrete base 8 through nuts;

[0062] Step i, the clamping mechanism 3 releases the clamping of the corbel 711, and drives the assembly tire frame 2 to descend through the fine adjustment mechanism 5, so that the support plate 31 is separated from the corbel 711;

[0063] Step j: Move the assembly tire frame 2 to the pre-assembly station through the sliding mechanism 6.

[0064] Repeat the above process, move each pre-assembled large-span steel structure to the designated position in sequence, install other components such as tie rods and roofs, and finally form the entire large-span steel structure building.

[0065] In step b, the hydraulic pusher 41 of the lifting mechanism 4 is at the lowest point of the stroke. In the fine-tuning mechanism 5, the servo motor 55 drives the worm 54 to rotate, and through the transmission of the worm gear 54, the lower movable wedge 52 is driven to move laterally, thereby driving the upper fixed wedge 51 and the support plate 31 to rise until the support plate 31 reaches the specified position; the base displacement sensor 58 is fixed to the lower end surface of the support plate 31 and is used to detect the distance between the support plate 31 and the concrete base 8. The base displacement sensor 58 transmits the current position information to the processor, and calculates the distance that the lower movable wedge 52 needs to move laterally in combination with the preset height of the support plate 31. The servo sensor of the servo motor 55 and the longitudinal displacement sensor 56 and the wedge displacement sensor 57 accurately control the rotation speed of the servo motor 55, so that the support plates 31 of each tire frame column 21 are all at the same preset height.

[0066] In step c, the positioning movable plate 32 is driven by the positioning hydraulic cylinder 33 to move downward until it abuts against the top surface of the corbel 711 of the steel column 71 to clamp and position it;

[0067] In step g, the current height of each steel column 71 is measured by the base displacement sensor 58, and the servo motor 55 drives the lower movable wedge 52 to fine-tune the steel column 71 to the specified height; the height directly measured by the base displacement sensor 58 is the distance between the support plate 31 and the concrete base 8, which is converted by the processor into the height of the steel column 71. The specified height of the steel column 71 after fine-tuning should meet the following conditions: In step h, the hydraulic jack 41 first descends to the lowest point of the stroke. At this time, the bottom plate of the steel column 71 does not contact the concrete base 8, leaving 2-3 cm of space for the fine-tuning mechanism 5 to fine-tune the height of the steel column 71, and then each servo motor 55 drives each steel column 71 to descend synchronously and slowly through the wedge adjustment system to reduce the impact on the concrete base 8.

[0068] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A large-span steel structure assembly device, characterized in that: include: The lifting mechanism is used to lift the steel columns and beams to the designated positions on the assembly frame; Assembly cradle, used to pre-assemble steel columns and beams into long-span steel structures; A clamping mechanism, used for clamping and positioning the steel column, wherein the clamping mechanism is arranged on the side of the assembly frame; Lifting mechanism, used to raise or lower the height of the assembly frame and pre-assembled large-span steel structure; Fine-tuning mechanism, used to fine-tune the height of the assembled frame and pre-assembled large-span steel structure; and a sliding mechanism, used for driving the assembly frame and the pre-assembled large-span steel structure to move to a designated position in the site, the fine-adjustment mechanism is arranged at the bottom of the assembly frame, and the lifting mechanism is arranged between the fine-adjustment mechanism and the sliding mechanism; The sliding mechanism comprises a sliding guide rail and a sliding seat slidably arranged on the sliding guide rail; The lifting mechanism comprises a hydraulic pusher, a lifting guide column, a lifting guide seat and a lifting top plate, wherein the hydraulic pusher is arranged between the lifting top plate and the sliding seat, the lifting guide column and the lifting guide seat are slidably matched, the top end of the lifting guide column is fixed on the lifting top plate, and the lifting guide seat is fixed on the sliding seat; The fine-tuning mechanism includes an upper fixed wedge block, a lower movable wedge block, a fine-tuning base, a worm, a turbine, a servo motor, a longitudinal displacement sensor, a wedge displacement sensor and a base displacement sensor. The upper fixed wedge block and the lower movable wedge block have inclined surfaces with the same inclination and fit each other. The upper fixed wedge block is fixed to the bottom of the tire frame column. The fine-tuning base is fixed to the upper end surface of the lifting top plate. The fine-tuning base is provided with a fine-tuning dovetail groove. The bottom of the lower movable wedge block is provided with a fine-tuning dovetail protrusion that slides with the fine-tuning dovetail groove. The turbine is fixed to the fine-tuning base. The worm and the turbine cooperate and are driven to rotate by the servo motor. The longitudinal displacement sensor is arranged on the lifting top plate to detect the distance between the lifting top plate and the bottom plate of the tire frame column. The wedge displacement sensor is arranged on the servo motor to detect the lateral displacement distance of the lower movable wedge. The base displacement sensor is fixed to the lower end surface of the support plate to detect the distance between the support plate and the concrete base.

2. The large-span steel structure assembly device according to claim 1, characterized in that: The assembled tire frame comprises tire frame columns located on both sides and a tire frame crossbeam used for connecting the tire frame columns on both sides.

3. The large-span steel structure assembly device according to claim 2 is characterized in that: The clamping mechanism includes a support plate, a positioning movable plate, a positioning hydraulic cylinder, a positioning guide rod and a positioning bracket. The support plate is fixedly mounted at the bottom of the tire frame column and is used to support the corbel of the steel column. The positioning bracket is fixedly mounted on the tire frame column. The positioning hydraulic cylinder is fixedly mounted on the positioning bracket. The positioning guide rod is slidably mounted on the positioning bracket. The positioning movable plate is fixedly connected to the piston rod end of the positioning hydraulic cylinder and the end of the positioning guide rod.

4. The large-span steel structure assembly device according to claim 1, characterized in that: The hoisting mechanism comprises a hoisting track, a gantry slidably arranged on the hoisting track, and two hoists slidably arranged on the main beam on the gantry.

5. The large-span steel structure assembly device according to claim 2, characterized in that: The assembled tire frame also includes a manual installation platform and a platform moving mechanism fixed to the top of the tire frame column. The manual installation platform includes a U-shaped platform fixed to the tire frame column and a flip platform rotatably arranged at the two ends of the U-shaped platform. When the two flip platforms are flipped down, they are spliced ​​with the U-shaped platform to form a circular manual installation platform surrounding the tire frame column and the steel column. The platform moving mechanism includes a platform support frame fixed to the tire frame column and a screw slide arranged on the platform support frame. The manual installation platform is fixedly connected to the sliding seat of the screw slide.

6. The construction method of the large-span steel structure assembly device according to any one of claims 1 to 5, characterized in that: The steps include: Step a: The assembling tire frame is at the pre-installation station, and the steel column is lifted to the concrete base beside the tire frame column by a lifting mechanism, and the bottom of the steel column is connected to the bolt of the concrete base by a nut; Step b, lifting the tire frame column to a specified height through the fine-tuning mechanism, placing the corbel on the support plate and fitting it to the steel column, and welding the corbel to the steel column; Step c, clamping the corbel by a clamping mechanism; Step d: Use a lifting mechanism to lift the steel beam to the top of the steel column, and fix the steel column and the steel beam to obtain a pre-assembled large-span steel structure; Step e: Unscrew the nut at the bottom of the steel column, and lift the frame column and the large-span steel structure through the lifting mechanism, so that the bottom plate of the steel column leaves the concrete base; Step f, moving the pre-assembled large-span steel structure to a designated location within the factory through a sliding mechanism; Step g, adjusting the height of each steel column from the concrete base to be consistent through a fine-tuning mechanism; Step h, driving the steel column down through the lifting mechanism and the fine-adjusting mechanism until the bottom plate of the steel column abuts against the concrete base, and the bottom of the steel column is connected to the bolts of the concrete base through nuts; Step i, the clamping mechanism releases the clamping of the corbel, and the assembly frame is driven down by the fine-tuning mechanism, so that the support plate is separated from the corbel; Step j: Move the assembly frame to the pre-assembly station through the sliding mechanism.

7. The construction method of the large-span steel structure assembly device according to claim 6 is characterized in that: In step b, the hydraulic pusher of the lifting mechanism is at the lowest point of the stroke, and in the fine-tuning mechanism, the servo motor drives the worm to rotate, and through the transmission of the worm gear, the lower movable wedge is driven to move laterally, thereby driving the upper fixed wedge and the support plate to rise until the support plate reaches the specified position; In the step c, the positioning movable plate is driven by the positioning hydraulic cylinder to move downward until it abuts against the top surface of the corbel of the steel column to clamp and position it; In step g, the current height of each steel column is measured by the base displacement sensor, and the servo motor drives the movable wedge to fine-tune the steel column to the specified height.

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