A steel structure pre-assembly device and assembly method based on limited perception

Abstract

The present invention belongs to the technical field of steel structure assembly, and particularly relates to a steel structure pre-assembly device and assembly method based on limited perception. The device includes a replica plate, a longitudinal connection frame and a positioning connecting rod. The replica plate includes a flange plate, and four longitudinal adjustment screw holes are evenly arranged on the annular surface of the flange plate; the longitudinal connection frame includes an annular frame, and four positioning plates are evenly arranged on the side wall of the annular frame, and positioning plates are arranged at both ends of the positioning plate, and positioning clips are fixed on the inner wall, and radial adjustment screw holes are arranged on the annular frame; the positioning connecting rod includes four connecting rods, four radial connecting screws and four longitudinal connecting screws, and the long arm end of the connecting rod is connected to the flange plate through the longitudinal adjustment screw hole, and the short arm end is connected to the annular frame through the radial adjustment screw hole. The present invention physically replicates the relative position and posture of the end to be matched through the longitudinal connection frame, the replica plate and the positioning connecting rod, guides the precise matching and installation of adjacent connection ends, saves time and space costs, and ensures economy.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel structure assembly, and in particular relates to a steel structure pre-assembly device and an assembly method based on limited perception. Background Art

[0002] Due to the limitations of transportation and installation conditions, steel structure segments need to be assembled on site, which requires strict control of assembly accuracy. For example, the butt joints of steel structure segments are often connected by internal flange bolting and external pipe welding. Therefore, it is necessary to ensure that the postures of the flanges match each other and fit tightly to prevent overall linear deviation caused by connection angle deviation.

[0003] The traditional matching method is to place the assembled front and rear segments according to the design pattern, complete the welding installation of the front end flange, and first spot weld the rear end flange to be installed close to the installed flange to form a stable working surface, weld the flange ribs, and then cut off the spot welding connection parts to complete a flange matching. However, there are several disadvantages in the actual processing process: 1. The connection process requires the front and rear segments to be placed on the assembly site, and the lifting and adjustment process is time-consuming and laborious; 2. Due to the limited space of the assembly site, group matching and installation are required, so each group must have a segment in an idle state, occupying the assembly site and affecting the construction progress; 3. Spot welding fixation and welding point cutting may cause the flange to deform, affecting the close fit of the flanges between the segments. Summary of the invention

[0004] In order to overcome the problems that the existing on-site steel structure connection end matching process is time-consuming and labor-intensive and affects the construction progress, the purpose of the present invention is to provide a steel structure pre-assembly device and assembly method based on limited perception, so that when assembling steel structure segments, the connection ends can be quickly matched and installed without the assistance of the previous segment. It only needs to rely on the equipment's own posture adjustment to achieve accurate positioning and provide a rigid construction platform.

[0005] The technical solution of the present invention is: a steel structure pre-assembly device based on limited perception, including a replica plate, a longitudinal connection frame and a positioning connecting rod, the replica plate includes a flange plate, the flange plate is annular, and four longitudinal adjustment screw holes are evenly arranged on the annular surface of the flange plate; the longitudinal connection frame includes an annular frame, the annular frame is located outside the flange plate, and four positioning plates are evenly arranged on the side wall of the annular frame, the positioning plate is H-shaped, and the left and right ends of the H-shaped positioning plate are respectively provided with positioning pieces, and the inner wall of the positioning plate is fixed with a positioning clip, The positioning clip is of the same size and shape as the positioning plate and is arranged in parallel. A radial adjustment screw hole is provided on the annular frame at the symmetrical center of the positioning plate; the adjustment connecting rod includes four connecting rods, four radial connecting screws and four longitudinal connecting screws. The longitudinal connecting screws are located in the longitudinal adjustment screw holes, and the radial connecting screws are located in the radial adjustment screw holes. The connecting rod is L-shaped, and the long arm end of the L-shaped connecting rod is connected to the flange plate through the longitudinal connecting screw, and the short arm end of the L-shaped connecting rod is connected to the annular frame through the radial connecting screws.

[0006] The upper edge of the annular frame is provided with a plurality of lifting ears.

[0007] A plurality of flange holes are evenly arranged on the annular surface of the flange plate, and a plurality of flange stops are respectively arranged on both sides of the annular surface of the flange plate. The flange plate is used to connect with a matching flange plate, and the length of the inner side of the flange stop from the center of the annular surface of the flange plate is greater than 3 mm of the outer diameter of the flange plate matching with the flange plate, and the inner circle size of the annular surface of the flange plate and the opening position of the flange holes are consistent with the matching flange plate.

[0008] The positioning piece is provided with scale lines, the positioning plate is provided with clip bolts, the positioning clip is fixedly connected to the positioning plate through the clip bolts, a matching end steel structure is provided on the inner side of the positioning clip, the inner diameter of the positioning clip is 3 mm larger than the outer diameter of the matching end steel structure, the inner side of the positioning piece is used to connect to the matching end steel structure, the inner diameter of the positioning piece is 3 mm larger than the outer diameter of the end steel structure matching the positioning piece.

[0009] The width of the short arm end of the L-shaped connecting rod is greater than the width of the long arm end of the L-shaped connecting rod, and an oblong hole is provided at the short arm end of the L-shaped connecting rod connected to the annular frame.

[0010] A virtual assembly method for a steel structure, using any one of the steel structure pre-assembly devices based on limited perception as described above, comprises the following steps:

[0011] S1: Determine the matched connection ends, the connection ends to be matched, the installed connections and the connection parts to be installed of the steel structure on site, draw a longitudinal design baseline along the longitudinal direction of the steel structure within the range of 1000mm from the highest point of the top of the steel structure of the matched connection ends and the connection ends to be matched to the end face, and determine the actual deviation values ​​of the steel structure end faces of the matched connection ends and the connection ends to be matched respectively;

[0012] S2: According to the actual deviation value of the end face of the steel structure at the matched connection end, the replica plate is controlled and positioned by adjusting the positioning plate of the annular frame of the steel structure pre-assembly device with the fixed position of the matched connection end, and the top edge of the positioning plate at the uppermost part of the steel structure pre-assembly device is controlled to be aligned with the longitudinal design baseline;

[0013] S3: According to the actual deviation value of the steel structure end face of the connection end to be matched, adjust the fixed position of the steel structure pre-assembly device and the connection end to be matched, use the replica plate as the working surface, and complete the positioning and installation of the connection end to be matched.

[0014] The actual deviation value of the steel structure end face is determined in step S1 by using the lofting parameter method to measure the physical component, specifically: a number of sections and feature points are selected on the steel structure of the matched connection end or the connection end to be matched, and the coordinate positions are measured by vertically hitting the ground with a laser point, and the measured feature point coordinate connection line is compared with the steel structure design component of the matched connection end or the connection end to be matched, and the design component end face line of the actual component of the steel structure of the matched connection end or the connection end to be matched is determined, thereby obtaining the position deviation of the actual component end face line of the steel structure of the matched connection end or the connection end to be matched with the design component end face line; or The method comprises the following steps: performing three-dimensional laser scanning on the steel structure of the matched connection end to be measured or the steel structure to be matched, obtaining point cloud data of the actual component of the steel structure of the matched connection end to be measured or the steel structure to be matched, aligning the point cloud data to obtain a complete point cloud data model of the actual component, performing three-dimensional modeling on the theoretical design component of the steel structure of the matched connection end to be measured or the steel structure to be matched, extracting the point cloud model of the design entity model, performing deviation detection on the actual point cloud model and the design point cloud model, and obtaining the position deviation between the end surface line of the actual component of the steel structure of the matched connection end to be measured or the steel structure to be matched and the end surface line of the design component.

[0015] In the step S2, the replica plate is controlled and positioned, and the specific process is: the top edge of the uppermost positioning piece of the steel structure pre-assembly device is controlled to be aligned with the longitudinal design baseline, each longitudinal connecting screw is first adjusted to the farthest position to leave space for adjusting the posture of the replica plate, and the flange plate is adjusted to be close to the installed connecting piece by adjusting the radial connecting screw and the longitudinal connecting screw, and the connecting piece to be installed is fixed on the flange plate by using the flange block, and the flange holes are aligned, 2 to 4 flange holes 2 are selected for trial tightening and fixing, and the radial connecting screws and the longitudinal connecting screws are tightened; or directly by obtaining the measurement positioning and lofting parameters, the expansion and contraction amount of the radial connecting screws and the longitudinal connecting screws are adjusted, the connecting piece to be installed is fixed on the flange plate by using the flange block, and the flange holes are aligned, 2 to 4 flange holes 2 are selected for trial tightening and fixing, the connecting piece to be installed is used to be installed with the steel structure of the connecting end to be matched, and the radial connecting screws and the longitudinal connecting screws are tightened to complete the control positioning of the replica plate.

[0016] In the steps S2 and S3, the fixed position of the steel structure pre-assembly device and the matched connection end or the to-be-matched connection end is adjusted according to the actual deviation value of the steel structure end face. The specific process is: determine the actual component end face line of the steel structure end face of the matched connection end or the to-be-matched connection end by measuring the physical component, and adjust the position of the port positioning piece according to the deviation. If the actual component end face line size exceeds the designed component end face line, adjust the position to the outside; if the actual component end face line size is shorter than the designed component end face line, adjust the position to the inside; after determining the end face position, fix the positioning clip on this side, tighten the clip bolt on this side, and complete the position fixing of the steel structure pre-assembly device and the matched connection end or the to-be-matched connection end.

[0017] When the connection end to be matched in step S2 is a multi-limb lattice, the adjustment offset value of the replica board is determined by respectively measuring the horizontal and vertical distances from the limb spacing reference line at both ends of the center line of the connection pieces on both sides of the multi-limb lattice of the connection end to be matched.

[0018] The technical effects of the present invention are: 1. The present invention completes the adaptive fixation of posture and installed connecting parts through radial connecting screws and longitudinal connecting screws, which greatly speeds up the construction progress and saves construction costs while ensuring the matching accuracy; 2. The present invention uses a replica plate to guide the installation of the plane position parameters and inclination parameters of the installed connecting end in the form of a physical template, so that the connecting parts to be installed can be fixed in space, and the matching and installation of adjacent connecting ends can be achieved accurately and reliably; 3. The present invention fixes the connecting parts to be installed through flange plates and adopts non-welding means. Deformation caused by welding and cutting will not occur during the fixing process, making the connection link tighter and more reliable.

[0019] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of a steel structure pre-assembly device based on limited perception according to the present invention.

[0021] Figure 2 It is a structural front view of a steel structure pre-assembly device based on limited perception according to the present invention.

[0022] Figure 3 It is a structural side view of a steel structure pre-assembly device based on limited perception according to the present invention.

[0023] Figure 4 It is a schematic diagram of connecting a steel structure pre-assembly device based on limited perception and a matched connection end of the present invention.

[0024] Figure 5 It is a cross-sectional view of a steel structure pre-assembly device based on limited perception and a matched connection end of the present invention.

[0025] Figure 6 It is a schematic diagram of connecting a steel structure pre-assembly device based on limited perception and a connection end to be matched according to the present invention.

[0026] Figure 7 It is a top view schematic diagram of a multi-limb lattice docking of a steel structure pre-assembly device based on limited perception of the present invention.

[0027] Figure 8 It is a schematic side view of a multi-limb lattice docking of a steel structure pre-assembly device based on limited perception according to the present invention.

[0028] Figure markings: 1-flange plate; 2-flange hole; 3-flange stopper; 4-positioning clip; 5-scale line; 6-clip bolt; 7-annular frame; 8-lifting ear; 9-connecting rod; 10-radial connecting screw; 11-longitudinal connecting screw; 12-matched connection end; 13-longitudinal design baseline, 14-installed connector, 15-actual component end line, 16-design component end line, 17-connector to be installed, 18-connection end to be matched, 19-connector center line, 20-reference line of spacing between limbs. DETAILED DESCRIPTION

[0029] Example 1

[0030] like Figure 1~Figure 3As shown, a steel structure pre-assembly device based on limited perception includes a replica plate, a longitudinal connection frame and a positioning connecting rod, wherein the replica plate includes a flange plate 1, the flange plate 1 is annular, and four longitudinal adjustment screw holes are evenly arranged on the annular surface of the flange plate 1; the longitudinal connection frame includes an annular frame 7, the annular frame 7 is located outside the flange plate 1, and four positioning plates are evenly arranged on the side wall of the annular frame 7, the positioning plate is H-shaped, and the left and right ends of the H-shaped positioning plate are respectively provided with positioning pieces, and the inner wall of the positioning plate is fixed A positioning clip 4 is provided, which is of the same size and shape as the positioning plate and is arranged in parallel. A radial adjustment screw hole is provided on the annular frame 7 at the symmetrical center of the positioning plate; the adjustment connecting rod includes four connecting rods 9, a radial connecting screw 10 and a longitudinal connecting screw 11, the longitudinal connecting screw 11 is located in the longitudinal adjustment screw hole, the radial connecting screw 10 is located in the radial adjustment screw hole, the connecting rod 9 is L-shaped, the long arm end of the L-shaped connecting rod 9 is connected to the flange plate 1 through the longitudinal connecting screw 11, and the short arm end of the L-shaped connecting rod 9 is connected to the annular frame 7 through the radial connecting screw 10.

[0031] When the present invention is actually used, according to Figure 4~Figure 6 As shown, each longitudinal connecting screw 11 is first adjusted to the farthest position to leave space for adjusting the replica plate posture, and then the deviation of the end face of the matched connecting end 12 is checked, and the actual component end face line 15 of the end face is determined by measuring the physical component, and the position of the port positioning piece is adjusted according to the deviation. If the size of the actual component end face line 15 exceeds the design component end face line 16, it is adjusted to the outside. If the size of the actual component end face line 15 is shorter than the design component end face line 16, it is adjusted to the inside. The present invention can adjust the manufacturing error of 20mm at each end; control the maximum The top edge of the upper positioning piece is aligned with the longitudinal design baseline 13; after determining the end face position, fix the positioning clip 4 on this side, tighten the clip bolt 6 on this side, and then loosen and adjust the radial connecting screws 10 and the longitudinal connecting screws 11 as needed, fix the flange plate 1 to the matching flange plate, tighten the radial connecting screws 10 and the longitudinal connecting screws 11, and complete the posture replication and fixation. The virtual assembly joint device of the steel structure provided in the implementation scheme of the present invention not only ensures the matching accuracy, but also greatly speeds up the construction progress and saves the construction cost.

[0032] Example 2

[0033] On the basis of Embodiment 1, in this embodiment, a plurality of lifting ears 8 are provided on the upper edge of the annular frame 7 .

[0034] The upper edge of the annular frame 7 of the present invention is provided with a plurality of lifting ears 8, which facilitates lifting during use.

[0035] Example 3

[0036] On the basis of Example 1 or Example 2, in this embodiment, a plurality of flange holes 2 are evenly arranged on the annular surface of the flange plate 1, a plurality of flange stops 3 are respectively arranged on both sides of the annular surface of the flange plate 1, the flange plate 1 is used to connect a flange plate matching it, the length of the inner side of the flange stop 3 from the center of the annular ring of the flange plate 1 is greater than 3 mm of the outer diameter of the flange plate matching it, and the inner circle size of the annular ring of the flange plate 1 and the opening position of the flange hole 2 are consistent with the flange plate matching it.

[0037] The flange plate 1 of the present invention is evenly provided with a plurality of flange holes 2 on the annular surface, and the connecting piece 17 to be installed is fixed through the flange holes 2 of the flange plate 1. Non-welding means are adopted, and deformation caused by welding and cutting will not occur during the fixing process, making the connection link more compact and reliable. A plurality of flange stoppers 3 are respectively provided on both sides of the annular surface of the flange plate 1, and the flange plate 1 is connected with a matching flange plate. The length of the inner side of the flange stopper 3 from the center of the annular ring of the flange plate 1 is greater than the outer diameter of the matching flange plate by 3 mm, which is convenient for the posture matching and fixing of the flange.

[0038] Example 4

[0039] On the basis of Example 1 or Example 3, in this embodiment, the positioning piece is provided with a scale line 5, the positioning plate is provided with a clip bolt 6, the positioning clip 4 is fixedly connected to the positioning plate through the clip bolt 6, and a matching end steel structure is provided on the inner side of the positioning piece, and the inner diameter of the positioning piece is 3 mm larger than the outer diameter of the matching end steel structure.

[0040] The inner side of the positioning piece of the present invention is provided with a matching end steel structure, and the inner diameter of the positioning piece is 3 mm larger than the outer diameter of the matching end steel structure, which is convenient for the insertion of the clip. The position of the positioning clip 4 can be flexibly adjusted by the clip bolt 6. The spacing between the positioning positions of each pair of the positioning clips 4 and the positioning pieces is 30 mm smaller than the designed spacing of the connection ends. 20 mm is reserved on each side for adjusting the fixed position of the connection ends, which can ensure that the spacing between adjacent connection ends is the designed spacing.

[0041] Example 5

[0042] Based on Example 1 or Example 4, in this embodiment, the width of the short arm end of the L-shaped connecting rod 9 is greater than the width of the long arm end of the L-shaped connecting rod 9, and the short arm end of the L-shaped connecting rod 9 connected to the annular frame 7 is provided with an oblong hole.

[0043] The width of the short arm end of the L-shaped connecting rod 9 of the present invention is greater than the width of the long arm end of the L-shaped connecting rod 9, and the width is widened by 100 mm for easy connection. The short arm end of the L-shaped connecting rod 9 connected to the annular frame 7 is provided with an oblong hole to facilitate the adjustment of the replica plate in the annular plane.

[0044] Example 6

[0045] A virtual assembly method for a steel structure, using any one of the steel structure pre-assembly devices based on limited perception as described above, comprises the following steps:

[0046] S1: Determine the matched connection end 12, the connection end to be matched 18, the installed connection piece 14 and the connection piece to be installed 17 of the steel structure on site, draw a longitudinal design baseline 13 along the longitudinal direction of the steel structure within the range of 1000mm from the highest point of the top of the steel structure of the matched connection end 12 and the connection end to be matched 18 to the end face, and determine the actual deviation values ​​of the end faces of the steel structures of the matched connection end 12 and the connection end to be matched 18 respectively;

[0047] S2: According to the actual deviation value of the steel structure end face of the matched connection end 12, the positioning plate of the annular frame 7 of the steel structure pre-assembly device is adjusted to the fixed position of the matched connection end 12, and the top edge of the uppermost positioning piece of the steel structure pre-assembly device is controlled to be aligned with the longitudinal design baseline 13, so as to control the positioning of the replica plate;

[0048] S3: According to the actual deviation value of the steel structure end face of the connection end 18 to be matched, adjust the fixed position of the steel structure pre-assembly device and the connection end 18 to be matched, and use the replica plate as the working surface to complete the positioning and installation of the connection end 18 to be matched.

[0049] In the step S2, the replica plate is controlled and positioned, and the specific process is: the top edge of the uppermost positioning plate of the steel structure pre-assembly device is controlled to be aligned with the longitudinal design baseline 13, and each longitudinal connecting screw 11 is first adjusted to the farthest position to leave space for adjusting the posture of the replica plate, and the flange plate 1 is adjusted to be close to the installed connecting piece 14 by adjusting the radial connecting screw 10 and the longitudinal connecting screw 11, and the connecting piece 17 to be installed is fixed to the flange plate 1 by the flange stopper 3, and the flange holes 2 are aligned, and 2 to 4 flange holes 2 are selected for trial tightening and fixing. The connecting piece 17 to be installed is used for installation with the steel structure of the connecting end 18 to be matched, and the radial connecting screw 10 and the longitudinal connecting screw 11 are tightened to complete the control positioning of the replica plate.

[0050] In step S2, the replica plate is controlled and positioned, and the specific process is: omitting the step of fixing and connecting the device to the matched connection end, directly obtaining the measurement positioning and layout parameters, accurately adjusting the expansion and contraction amount of the radial connecting screw 10 and the longitudinal connecting screw 11, fixing the connecting piece 17 to be installed on the flange plate 1 by means of the flange stopper 3, aligning the flange holes 2, selecting 2 to 4 flange holes 2 for trial tightening and fixing, tightening the radial connecting screw 10 and the longitudinal connecting screw 11, and completing the control and positioning of the replica plate.

[0051] In the step S1, the actual deviation value of the end face of the steel structure is determined by using the lofting parameter method to measure the physical component, specifically: a number of sections and feature points are selected on the steel structure of the matched connection end steel structure pre-assembly device 12 or the to-be-matched connection end steel structure pre-assembly device 18, and the coordinate position thereof is measured by vertically hitting the ground with a laser point, and the measured feature point coordinate connection line is connected with the steel structure design component of the matched connection end steel structure pre-assembly device 12 or the to-be-matched connection end steel structure pre-assembly device 18 By comparison, the design component end line steel structure pre-assembly device 16 steel structure pre-assembly device of the steel structure actual component of the matched connection end steel structure pre-assembly device 12 steel structure pre-assembly device or the to-be-matched connection end steel structure pre-assembly device 18 steel structure pre-assembly device is determined, thereby obtaining that the steel structure actual component end line steel structure pre-assembly device 15 steel structure pre-assembly device of the matched connection end steel structure pre-assembly device 12 steel structure pre-assembly device or the to-be-matched connection end steel structure pre-assembly device 18 steel structure pre-assembly device is the same as the design component end line steel structure pre-assembly device 16 steel structure pre-assembly device or perform three-dimensional laser scanning on the steel structure of the matched connection end steel structure pre-assembly device 12 steel structure pre-assembly device to be tested or the steel structure pre-assembly device 18 steel structure pre-assembly device to be matched, obtain the point cloud data of the actual components of the steel structure of the matched connection end steel structure pre-assembly device 12 steel structure pre-assembly device to be tested or the steel structure pre-assembly device 18 steel structure pre-assembly device to be matched, align the point cloud data to obtain a complete point cloud data model of the actual components, and align the point cloud data to obtain a complete point cloud data model of the actual components. The theoretical design components of the steel structure of the steel structure pre-assembly device or the matching connection end steel structure pre-assembly device 18 steel structure pre-assembly device are three-dimensionally modeled, the point cloud model of the design entity model is extracted, and the actual point cloud model is detected for deviation from the design point cloud model to obtain the position deviation of the steel structure actual component end surface line steel structure pre-assembly device 15 steel structure pre-assembly device of the matched connection end steel structure pre-assembly device 12 steel structure pre-assembly device or the matching connection end steel structure pre-assembly device 18 steel structure pre-assembly device and the design component end surface line steel structure pre-assembly device 16 steel structure pre-assembly device.

[0052] In step S1, the actual deviation value of the end face of the steel structure is determined, and the solid component is measured by the lofting parameter method, specifically: or a three-dimensional laser scan is performed on the steel structure to be measured, and the point cloud data of the actual component is obtained, and the point cloud data is aligned to obtain a complete point cloud data model of the actual component, and a three-dimensional modeling is performed on the theoretical design component of the steel structure to be measured, and the point cloud model of the design entity model is extracted, and the deviation detection is performed between the actual point cloud model and the design point cloud model to obtain the position deviation between the end face line 15 of the actual component and the end face line 16 of the design component, and then the fixed position of the steel structure of the matched connection end 12 on the positioning piece and the scale line 5 can be adjusted according to the deviation adjustment step in Example 1. In the process of performing a three-dimensional laser scanning process on the steel structure of the matched connection end 12, the relative position between the matched connection end 12 and the installed connection part 14 can be obtained at the same time, and the extracted relative position parameters can be used as the lofting parameters for guiding the installation of the connection part 17 to be installed; when the replica plate is controlled and positioned, the lofting parameters are used to guide the radial connection screw 10 and the longitudinal connection screw 11 to extend or shorten, and the flange plate 1 is adjusted in place.

[0053] In the steps S2 and S3, the fixed position of the steel structure pre-assembly device with the matched connection end 12 or the to-be-matched connection end 18 is adjusted according to the actual deviation value of the steel structure end face. The specific process is: the actual component end face line 15 of the steel structure end face of the matched connection end 12 or the to-be-matched connection end 18 to be measured is determined by measuring the physical component, and the position of the port positioning piece is adjusted according to the deviation. If the size of the actual component end face line 15 exceeds the design component end face line 16, it is adjusted to be clamped outwardly; if the size of the actual component end face line 15 is shorter than the design component end face line 16, it is adjusted to be clamped inwardly; after determining the end face position, the positioning clip 4 on this side is fixed, and the clip bolt 6 on this side is tightened to complete the position fixing of the steel structure pre-assembly device with the matched connection end 12 or the to-be-matched connection end 18.

[0054] When the connection end 18 to be matched in step S2 is a multi-limb lattice, the adjustment offset value of the replica board is determined by measuring the horizontal and vertical distances from the two ends of the center line 19 of the connection end 18 on both sides of the multi-limb lattice to the limb spacing reference line 20.

[0055] like Figure 7 , Figure 8As shown, at the end 18 of each limb to be matched in a segmented multi-limb lattice, the center point of each end face is determined, and the longitudinal extension line corresponding to the intersection of the diagonal center point connection line is used as the limb spacing reference line 20. It is assumed that the limb spacing reference lines 20 coincide with each other when adjacent segments are docked, and the offset value is calculated based on this; optionally, a measurement method or a method of extracting characteristic parameters using a three-dimensional laser scanning technology is used to obtain the overall lateral center spacing L1 and L11, L2 and L22, and the overall vertical center spacing L3 and L33, L4 and L44 of the lattice at both ends to be docked; in Example 1, after adjusting the posture of the replica plate according to the installation posture of the installed connector 14, tighten the longitudinal connecting screw 11, and then according to the obtained parameters, the horizontal directions are respectively adjusted along the annular plane of the device annular frame 7. and vertical direction The radial connection screw 10 is adjusted to adjust the offset. If the to-be-matched connection end 18 is located inside or above the matched connection end 12, the replica plate is adjusted outside or below. Otherwise, the replica plate is adjusted inside or above.

[0056] Preferably, the highest point of the top of each limb end face at one end of the multi-limb lattice segment is used as the measurement target, and the coordinates of the intersection of the diagonal lines are calculated. The coordinate point after subtracting the end face radius in the vertical direction is a point on the limb spacing reference line 20. At the same time, it is assumed that the limb spacing reference line 20 is parallel to the design end face normal direction. The horizontal and vertical distances of the end face center from the limb spacing reference line 20 are calculated for each limb end face, and used as parameters to calculate the adjustment of the offset. , .

[0057] Preferably, a three-dimensional laser scan is performed on the entire multi-limb lattice structure at one end of the segment, and the intersection of the diagonal lines connecting the centers of the end faces of each limb of the point cloud model is extracted as the limb spacing reference line 20. The reference line is parallel to the normal direction of the designed end face. The horizontal and vertical distances of the end face center from the limb spacing reference line 20 are calculated for each limb end face, and used as parameters to calculate the adjustment of the deviation. , .

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A steel structure pre-assembly device based on limited perception, characterized in that: The invention comprises a replica plate, a longitudinal connection frame and a positioning connecting rod, wherein the replica plate comprises a flange plate (1), the flange plate (1) is in the shape of a ring, and four longitudinal adjustment screw holes are evenly arranged on the annular surface of the flange plate (1); the longitudinal connection frame comprises an annular frame (7), the annular frame (7) is located outside the flange plate (1), and four positioning plates are evenly arranged on the side wall of the annular frame (7), the positioning plate is in the shape of an H, and positioning plates are respectively arranged at the left and right ends of the H-shaped positioning plate, and a positioning clip (4) is fixedly arranged on the inner wall of the positioning plate, and the positioning clip (4) is of the same size and shape as the positioning plate and is arranged in parallel, so that A radial adjustment screw hole is provided on the annular frame (7) at the symmetrical center of the positioning plate; the adjustment connecting rod comprises four connecting rods (9), four radial connecting screws (10) and four longitudinal connecting screws (11), the longitudinal connecting screws (11) are located in the longitudinal adjustment screw holes, the radial connecting screws (10) are located in the radial adjustment screw holes, the connecting rod (9) is L-shaped, the long arm end of the L-shaped connecting rod (9) is connected to the flange plate (1) through the longitudinal connecting screws (11), and the short arm end of the L-shaped connecting rod (9) is connected to the annular frame (7) through the radial connecting screws (10).

2. A steel structure pre-assembly device based on limited perception according to claim 1, characterized in that: The upper edge of the annular frame (7) is provided with a plurality of lifting ears (8).

3. According to claim 2, a steel structure pre-assembly device based on limited perception is characterized in that: A plurality of flange holes (2) are evenly arranged on the annular surface of the flange plate (1), and a plurality of flange stoppers (3) are respectively arranged on both sides of the annular surface of the flange plate (1). The flange plate (1) is used to connect with a matching flange, and the length of the inner side of the flange stopper (3) from the center of the annular ring of the flange plate (1) is greater than 3 mm of the outer diameter of the flange matching the flange plate (1). The inner circle size of the annular ring of the flange plate (1) and the opening position of the flange hole (2) are consistent with the matching flange.

4. According to claim 3, a steel structure pre-assembly device based on limited perception is characterized in that: The positioning piece is provided with a scale line (5), the positioning plate is provided with a clip bolt (6), the positioning clip (4) is fixedly connected to the positioning plate via the clip bolt (6), the inner side of the positioning piece is used to connect with the end steel structure matching with it, and the inner diameter of the positioning piece is 3 mm larger than the outer diameter of the end steel structure matching with the positioning piece.

5. A steel structure pre-assembly device based on limited perception according to claim 4, characterized in that: The width of the short arm end of the L-shaped connecting rod (9) is greater than the width of the long arm end of the L-shaped connecting rod (9), and the short arm end of the L-shaped connecting rod (9) connected to the annular frame (7) is provided with an oblong hole.

6. A steel structure virtual assembly method, using a steel structure pre-assembly device based on limited perception as claimed in claim 5, characterized in that: The steps include: S1: Determine the matched connection end (12), the connection end to be matched (18), the installed connection piece (14) and the connection piece to be installed (17) of the steel structure on site, draw a longitudinal design baseline (13) along the longitudinal direction of the steel structure within 1000 mm from the highest point of the top of the steel structure of the matched connection end (12) and the connection end to be matched (18) to the end face, and determine the actual deviation value of the end face of the steel structure of the matched connection end (12) and the connection end to be matched (18); S2: According to the actual deviation value of the steel structure end face of the matched connection end (12), the positioning plate of the annular frame (7) of the steel structure pre-assembly device is adjusted to the fixed position of the matched connection end (12), and the top edge of the uppermost positioning plate of the steel structure pre-assembly device is controlled to be aligned with the longitudinal design baseline (13), so as to control the positioning and lock the replica plate; S3: According to the actual deviation value of the steel structure end face of the to-be-matched connection end (18), the fixed position of the steel structure pre-assembly device and the to-be-matched connection end (18) is adjusted, and the positioning installation of the to-be-matched connection end (18) is completed using the replica plate as the working surface.

7. A virtual assembly method for steel structures according to claim 6, characterized in that: The actual deviation value of the steel structure end face is determined in step S1 by using the lofting parameter method to measure the physical component, specifically: a plurality of cross sections and characteristic points are selected on the steel structure of the matched connection end (12) or the connection end (18) to be measured, and the coordinate positions are measured by vertically hitting the ground with a laser point, and the measured characteristic point coordinate connection line is compared with the steel structure design component of the matched connection end (12) or the connection end (18) to be matched, and the design component end face line (16) of the actual component of the steel structure of the matched connection end (12) or the connection end (18) to be matched is determined, thereby obtaining the position deviation between the actual component end face line (15) of the steel structure of the matched connection end (12) or the connection end (18) to be matched and the design component end face line (16). ; or performing three-dimensional laser scanning on the steel structure of the matched connection end (12) or the matched connection end (18) to be tested, obtaining point cloud data of the actual component of the steel structure of the matched connection end (12) or the matched connection end (18) to be tested, aligning the point cloud data to obtain a complete point cloud data model of the actual component, performing three-dimensional modeling on the theoretical design component of the steel structure of the matched connection end (12) or the matched connection end (18) to be tested, extracting the point cloud model of the design entity model, performing deviation detection on the actual point cloud model and the design point cloud model, and obtaining the position deviation between the end surface line (15) of the actual component of the steel structure of the matched connection end (12) or the matched connection end (18) to be tested and the end surface line (16) of the designed component.

8. A virtual assembly method for steel structures according to claim 6, characterized in that: In step S2, the replica plate is controlled and positioned. The specific process is as follows: the top edge of the uppermost positioning piece of the steel structure pre-assembly device is controlled to be aligned with the longitudinal design baseline (13), each longitudinal connecting screw (11) is first adjusted to the farthest position to leave space for adjusting the posture of the replica plate, the flange plate (1) is adjusted to be in close contact with the installed connecting piece (14) by adjusting the radial connecting screw (10) and the longitudinal connecting screw (11), the connecting piece (17) to be installed is fixed to the flange plate (1) by the flange stopper (3), and the flange holes (2) are aligned, 2 to 4 flange holes (2) are selected for trial tightening and fixing, and the radial connecting screws are tightened. (10) and longitudinal connecting screw (11); or the step of fixing and connecting the device with the matched connecting end is omitted, and the expansion and contraction of the radial connecting screw (10) and the longitudinal connecting screw (11) are accurately adjusted by directly obtaining the measurement positioning and lofting parameters, and the connecting piece (17) to be installed is fixed on the flange plate (1) by using the flange stopper (3), and the flange holes (2) are aligned, and 2 to 4 flange holes (2) are selected for trial tightening and fixing, and the connecting piece (17) to be installed is used to be installed with the steel structure of the matching connecting end (18), and the radial connecting screw (10) and the longitudinal connecting screw (11) are tightened to complete the control positioning of the replica plate.

9. A virtual assembly method for steel structures according to claim 6, characterized in that: In the steps S2 and S3, the fixed position of the steel structure pre-assembly device with the matched connection end (12) or the connection end to be matched (18) is adjusted according to the actual deviation value of the steel structure end face. The specific process is as follows: the actual component end face line (15) of the steel structure end face of the matched connection end (12) or the connection end to be matched (18) to be measured is determined by measuring the physical component, and the position of the port positioning piece is adjusted according to the deviation. If the size of the actual component end face line (15) exceeds the design component end face line (16), it is adjusted to be positioned outward; if the size of the actual component end face line (15) is shorter than the design component end face line (16), it is adjusted to be positioned inward; after the end face position is determined, the positioning clip (4) on this side is fixed, and the clip bolt (6) on this side is tightened to complete the position fixing of the steel structure pre-assembly device with the matched connection end (12) or the connection end to be matched (18).

10. A steel structure virtual assembly method according to claim 6, characterized in that: When the connection end (18) to be matched in step S2 is a multi-limb lattice, the adjustment offset value of the replica board is determined by respectively measuring the horizontal and vertical distances between the two ends of the center line (19) of the connection pieces on both sides of the multi-limb lattice of the connection end (18) to be matched and the reference line (20) of the spacing between each limb.

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