A precisely adjustable steel truss assembly jig and an assembly method

Abstract

The present invention discloses a unit structure of a fully precisely adjustable steel truss assembly jig and an assembly method thereof. A slide rail (6) is installed on a base (5) of a unit jig (1). A vertical rod chute (12) connected to the lower end of a vertical rod (8) is matched with the slide rail (6). A support adjusting structure (9) is installed on the vertical rod (8) through a lifting sleeve (21). Two movable jaw plates (25) opposite to each other in the horizontal plane are installed on the support adjusting structure (9). The present invention can achieve precise adjustment in the horizontal direction and height. The unit jigs can be combined into a curved integral assembly jig as required, or can be combined into a regular integral assembly jig, and at the same time, it can be recycled among projects.

Description

Technical Field

[0001] The present invention relates to a steel truss assembly jig and an assembly method, belonging to the technical field of steel structure assembly jigs. Background Art

[0002] Currently, most steel truss construction adopts overall segment hoisting after ground scattered assembly. Traditional steel truss assembly jigs often use temporary welding of I-beams to fix the steel truss to be assembled on the jig by welding. During the construction process, the jig is randomly cut and welded, wasting construction materials and extremely difficult to ensure the stability of the jig. At the same time, it is easy to damage the steel truss. Under the situation of increasingly high requirements for green construction, it is necessary to develop an adjustable steel truss assembly jig that can be recycled under the premise of meeting construction requirements and safety. Among the existing assembly jig patent technologies, most jig patents can achieve a certain degree of adjustment in horizontal and height directions, such as the application numbers: 201420494597.5, 201520386637.9, 201620186814.3, 201820492522.1, but they cannot achieve precise adjustment in both horizontal and height directions at the same time. At the same time, most of the assembly jig patent designs are only for the assembly of conventional steel trusses. When dealing with steel trusses with complex curves, the existing patent assembly jigs cannot meet the assembly section curve requirements or can only meet the assembly of specific forms of steel trusses, such as the patent jig with the application number 201821090221.2. It can be seen that the existing patent jig technology cannot truly achieve full adjustment and meet the requirements of different steel truss volumes, curve requirements and precise positioning. It is necessary to invent a new type of adjustable jig to solve the above problems and realize the recycling of the assembly jig between different projects. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a precisely adjustable steel truss assembly jig and an assembly method to achieve the precise assembly and positioning of steel trusses with different volumes and curve requirements during the steel truss assembly process.

[0004] The technical solution of the present invention is:

[0005] A precisely adjustable steel truss assembly jig includes a base. A slide rail is installed on the base. The vertical rod chute connected to the lower end of the vertical rod is matched with the slide rail. A support adjustment structure is installed on the vertical rod through a lifting sleeve. Two movable jaw plates opposite to each other in the horizontal plane are installed on the support adjustment structure.

[0006] Leveling bolts are installed at the bottom of the I-beams on both sides of the base.

[0007] The lifting sleeve of the support adjustment structure is located above the support sleeve. The support sleeve is fixedly installed on the vertical rod. A jack support is connected to the side of the support sleeve. A jack is installed on the jack support, and the jack can lift the support adjustment structure.

[0008] Two vertical rods are installed on each slide rail, and at least one set of support adjustment structures are installed on each vertical rod, and the specific quantity is adjusted according to the number of main pipes of the support steel truss.

[0009] The support structure of the support adjustment structure includes a crossbar I-beam and a diagonal brace I-beam. The crossbar I-beam, the diagonal brace I-beam and the lifting sleeve are connected to form a triangular support structure, and a jack support is connected below the diagonal brace I-beam; two symmetrical fixed teeth are installed on the crossbar I-beam. The fixed teeth are composed of two triangular plates welded together. A movable tooth plate is installed on the straight steel plate with threaded holes. The movable tooth plate is composed of a threaded outer sleeve, a fixed bottom support and a plate with an inner rod groove.

[0010] Two rows of bolt holes symmetrical to the central axis of the slide rail are opened on the top surface of the slide rail. The distance between the bolt holes in the rows is less than the horizontal adjustable distance of the movable tooth plate on the support adjustment structure. The vertical rod chute is fixed to the bolt holes of the slide rail by bolts.

[0011] The vertical rod is made of I-beam. Two rows of bolt holes are opened on one side of the I-beam, and there are length scales on the other side; there are length scales on the upper surface of the crossbar I-beam; the upper end of the vertical rod and one end of the vertical rod chute use a diagonal tension channel steel as a strengthening structure, and a vertical rod triangular plate is provided at the connection between the bottom of the vertical rod and the vertical rod chute; the bottom of the slide rail is connected to the base through an enlarged triangular plate and multiple fixing bolts.

[0012] Multiple precisely adjustable steel truss assembly jigs are assembled in pairs. One end of the bases of two adjacent jigs is hinged, and the other end is connected by a connecting rod. By selecting connecting rods of different lengths, the assembly angle between two adjacent jigs can be adjusted.

[0013] The base is a rectangular frame structure formed by I-beams. An upper hinge plate and a lower hinge plate are respectively installed at two corners of one side, and connecting lugs are respectively installed at the other two corners of the rectangle. Multiple limit steel bars with different distances are provided on the connecting rod, and the openings on the connecting lugs cooperate with the limit steel bars vertically connected on the connecting rod.

[0014] An assembly method using the above-mentioned precisely adjustable steel truss assembly jig includes the following steps:

[0015] 1. Select a flat concrete assembly site and select a certain number of unit jigs according to the length of the steel frame to be assembled;

[0016] 2. Assemble the unit jigs one by one. First, adjust the leveling of each unit jig through leveling bolts, and then use fixed hinge bolts and connecting rods to connect and fix them;

[0017] 3. Adjust the movable tooth plate to make the inner rod groove plate close to the fixed tooth, remove the fastening bolts on the vertical rod slide slot, hang the first steel truss main pipe, adjust the position of each vertical rod on one side on the slide rail, so that the steel truss main pipe is placed on each supporting adjustment structure on the vertical rod on that side;

[0018] 4. Use the fastening bolts to fix the steel truss main pipe to fix the vertical rod slideway, and use the measuring instrument to adjust the elevation of each control point of the main pipe by adjusting the jack support and the jack, and adjust the plane position of each control point by the movable tooth plate, and then tighten the movable tooth plate to fix the steel truss main pipe to the preset position;

[0019] 5. Repeat steps 3 and 4 to adjust the second steel truss main pipe on the other side of the vertical pole to the preset position;

[0020] 6. Lift the main steel truss pipe to the preset supporting adjustment structure on one side, and repeat step 4 to adjust it to the preset position;

[0021] 7. Weld the connecting rods between the main pipes;

[0022] 8. Loosen each movable tooth plate until it is close to the fixed tooth, and use a crane to slightly lift the welded steel truss segment, so that the bottom of the steel truss main pipe is higher than the fixed tooth of the assembled tire frame, then loosen the fastening bolts on the slide groove of one side of the vertical pole, and move one side of the I-beam vertical pole to smoothly lift the steel truss segment;

[0023] 9. Repeat steps 3-8 to assemble the next section.

[0024] The beneficial effects of the present invention are as follows: Compared with the prior art, the advantages of the present invention are as follows:

[0025] 1. It can realize precise adjustment in horizontal direction and height. Unit tire frames can be combined into curved overall assembly tire frames as needed, or they can be combined into regular overall assembly tire frames. At the same time, they can be recycled between projects.

[0026] 2. The load-bearing structure is connected to the vertical pole through the sleeve and bolts and is jointly subjected to force. The vertical pole is connected to the slide rail through the slide groove and bolts and is jointly subjected to force. The force of the assembled tire frame is more reasonable.

[0027] 3. The splicing angle between unit frames can be adjusted, which is suitable for steel trusses with curves.

[0028] 4. After the tire frame is leveled, the regular steel truss can be quickly positioned and assembled using the tire frame's own scale without the need for measuring instruments. Irregular and special-shaped steel trusses can also be quickly positioned and assembled with the help of measuring instruments.

[0029] The invention has a simple structure, an ingenious design, and is easy to erect, and can realize accurate assembly of steel trusses with different volumes and curve requirements during the steel truss assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Overall assembly schematic of the present invention Figure 1 。

[0031] Figure 2 Overall assembly schematic of the present invention Figure 2 。

[0032] Figure 3 is Figure 1 the middle unit jig.

[0033] Figure 4 is Figure 3 the supporting and adjusting structure in

[0034] Figure 5 is Figure 1 the detailed drawing of the connecting rod part.

[0035] Figure 6 is Figure 3 the detailed drawing of the chute part in

[0036] Figure 7 is Figure 3 the detailed drawing of the fixed tooth part in Specific embodiments

[0037] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments:

[0038] In this embodiment, most of the steel structure components are made of I-beams.

[0039] Such as Figure 3 is a schematic structural diagram of a unit bench. The unit jig 1 consists of an I-beam base 5, a slide rail 6, I-beam vertical poles 8, a supporting and adjusting structure 9, and a vertical pole chute 12. Among them, the vertical pole 8 is welded to the vertical pole triangular plate 10 and then erected and welded on the vertical pole chute 12. The supporting and adjusting structure 9 is fixed to the I-beam vertical pole 8 by bolts. The diagonal tension channel steel 7 is bolted to the top of the vertical pole 8 and the outer end of the vertical pole chute 12. The vertical pole chute 12 can slide on the slide rail 6.

[0040] Furthermore, it is set that the diagonal tension channel steel 7 is bolted to the top of the vertical pole 8 and the distal end of the vertical pole chute 12.

[0041] The number of the supporting and adjusting structures 9 on each I-beam vertical pole 8 is adjusted according to the number of the main pipes of the supported steel structure truss. Figure 3 There are two supporting and adjusting structures 9 on each vertical pole 8 in Figure 4, the support adjustment structure 9 is composed of a jack support 17, a jack support sleeve 20, a jack 18, a jack top support 19, a lifting sleeve 21, an inclined strut I-beam 22, a crossbar I-beam 23, a fixed tooth 24, a movable tooth plate 25 and a fixing bolt; among them, the jack support 17 is welded to the support sleeve 20 of the jack, the support sleeve 20 is sleeved on the I-beam vertical rod 8, two rows of bolt holes are opened on one side of the I-beam vertical rod 8, and there is a length scale on the other side, and the position of the support sleeve 20 is fixed by bolts. The jack 18 is placed on the jack support 17, one end of the crossbar I-beam 23 is welded to the lifting sleeve 21, and both ends of the inclined strut I-beam 22 are respectively welded to the crossbar I-beam 23 and the lifting sleeve 21 to form an inverted triangular support structure. The lifting sleeve 21 is sleeved on the vertical rod 8, the jack top support 19 is welded to the inclined strut I-beam 22, and two fixed teeth 24 are welded to the crossbar I-beam 23. As Figure 7 , the fixed tooth 24 is formed by welding two triangular plates 29, the movable tooth plate 25 is installed on the straight steel plate 28 with threaded holes, and the movable tooth plate 25 is composed of a threaded outer sleeve 26, a fixed bottom support and an inner rod groove plate 27. There is a length scale on the upper surface of the crossbar I-beam 23.

[0042] As Figure 6 , two rows of bolt holes symmetrical to the central axis of the slide rail 6 are opened on the top surface of the slide rail 6, the distance between the bolt holes in the row is less than the laterally adjustable distance of the support adjustment structure 9, the vertical rod chute 12 can slide on the slide rail 6, and after the position of the vertical rod chute 12 is adjusted, it is fixed to the slide rail 6 with bolts. Further, the bottom of the slide rail 6 is connected to the base 5 through an enlarged triangular plate 30 and a plurality of fixing bolts.

[0043] The base 5 is a rectangular structure formed by splicing four I-beams. Leveling bolts 16 are installed at the bottoms of the two I-beams parallel to the slide rail 6. A hinge plate 13 and a lower hinge plate 14 are respectively installed at two corners of the rectangle perpendicular to the side of the slide rail 6, and connecting lugs 15 are respectively installed at the other two corners of the rectangle. As Figure 5 , a plurality of limiting steel bars 4 with different distances are arranged on the connecting rod 3, and the openings on the connecting lugs 15 can cooperate with the limiting steel bars 4 vertically connected on the connecting rod 3. Connecting rods 3 with different lengths can also be set. When two unit gantries 1 are spliced, the upper hinge plate 13 on one base 5 cooperates with the lower hinge plate 14 on the other base 5, and the fixing hinge bolt 2 is inserted. The connecting lugs 15 of the two bases 5 are connected by the connecting rod 3. By selecting the length of the connecting rod 3 or by cooperating the limiting steel bars 4 with different distances with the connecting lugs 15, the splicing angle of two adjacent unit gantries 1 can be adjusted. As Figure 1 , applicable to curved trusses, Figure 2 Applicable to straight trusses.

[0044] Specific splicing method:

[0045] 1. Select a flat concrete assembly site and select a certain number of unit tire frames 1 according to the length of the steel frame to be assembled;

[0046] Second, assemble the unit tire frames 1 one by one, first adjust the level of each unit tire frame 1 by the leveling bolt, and then connect and fix them with the fixing hinge bolts 2 and the connecting rods 3;

[0047] 3. Adjust the movable tooth plate 25 to make the inner rod groove plate 27 close to the fixed tooth 24, remove the fastening bolts on the vertical rod slide groove 12, hang the first steel truss main pipe, adjust the position of each vertical rod 8 on the slide rail 6, so that the steel truss main pipe is placed on each supporting adjustment structure 9 on the vertical rod 8 on the side;

[0048] Fourth, use the fastening bolts to fix the steel truss main pipe fixing rod slide 12, cooperate with the measuring instrument to adjust the elevation of each control point of the main pipe by adjusting the supporting sleeve 20 and the jack 18, adjust the plane position of each control point by the movable tooth plate 25, and then tighten the movable tooth plate 25 to fix the steel truss main pipe to the preset position;

[0049] 5. Repeat steps 3 and 4 to adjust the second steel truss main pipe on the other side of the vertical pole 8 to the preset position;

[0050] 6. Lift the main pipe of the subsequent steel truss to the preset side support adjustment structure 9, and repeat step 4 to adjust it to the preset position;

[0051] 7. Weld the connecting rods between the main pipes;

[0052] 8. Loosen each movable tooth plate 25 until it is close to the fixed tooth 24, and slightly lift the welded steel truss segment with a crane so that the bottom of the steel truss main pipe is higher than the fixed tooth 24 of the assembled tire frame, then loosen the fastening bolts on the slide groove 12 of one side of the vertical rod, and move the I-beam vertical rod 8 on one side to smoothly lift the steel truss segment;

[0053] 9. Repeat steps 3-8 to assemble the next section.

Claims

1. A precisely adjustable steel truss assembly jig, comprising a unit jig (1), characterized in that: On the base (5) of the unit jig (1), a slide rail (6) is installed. The vertical rod chute (12) connected to the lower end of the vertical rod (8) is matched with the slide rail (6). On the vertical rod (8), a support adjustment structure (9) is installed through a lifting sleeve (21). The support adjustment structure (9) is equipped with two movable jaw plates (25) opposite to each other on the horizontal plane; multiple unit jigs (1) are assembled in pairs. One end of the bases (5) of two adjacent unit jigs (1) is hinged, and the other end is connected by a connecting rod (3). Connecting rods (3) of different lengths are selected to adjust the assembly angle between two adjacent jigs; the lifting sleeve (21) of the support adjustment structure (9) is located above the support sleeve (20). The support sleeve (20) is fixedly installed on the vertical rod (8). On the side of the support sleeve (20), a jack support (17) is connected. A jack (18) is installed on the jack support (17). The jack (18) jacks up the support adjustment structure (9); the base (5) is a rectangular frame structure formed by I-beams. An upper hinge plate (13) and a lower hinge plate (14) are respectively installed at two corners on one side. Connecting lugs (15) are respectively installed at the other two corners of the rectangle. Multiple limit steel bars (4) with different distances are arranged on the connecting rod (3). The openings on the connecting lugs (15) are matched with the limit steel bars (4) vertically connected on the connecting rod (3). Two vertical rods (8) are installed on each slide rail (6). At least one set of support adjustment structures (9) is installed on each vertical rod (8), and the specific quantity is adjusted according to the number of main pipes of the supported steel structure truss.

2. The precisely adjustable steel truss assembly falsework according to claim 1, wherein: Leveling bolts (16) are installed at the bottoms of the I-beams on both sides of the base (5).

3. The precisely adjustable steel truss assembly falsework according to claim 1, wherein: The support structure of the support adjustment structure (9) includes a crossbar I-beam (23) and a diagonal brace I-beam (22). The crossbar I-beam (23) and the diagonal brace I-beam (22) are connected to the lifting sleeve (21) to form a triangular support structure. A jack top support (19) is connected below the diagonal brace I-beam (22); two symmetric fixed teeth (24) are installed on the crossbar I-beam (23). The fixed teeth (24) are formed by welding two triangular plates (29). A movable jaw plate (25) is installed on the straight steel plate (28) with a threaded hole. The movable jaw plate (25) consists of a threaded outer sleeve (26), a fixed bottom support, and an inner rod groove plate (27).

4. The precisely adjustable steel truss assembly falsework according to claim 1, wherein: Two rows of bolt holes symmetric to the central axis of the slide rail (6) are opened on the top surface of the slide rail (6). The distance between the bolt holes in the rows is less than the horizontal adjustable distance of the movable jaw plate (25) on the support adjustment structure (9). The vertical rod chute (12) is fixed to the bolt holes of the slide rail (6) by bolts.

5. The precisely adjustable steel truss assembly falsework according to claim 3, characterized in that: The vertical rod (8) is made of an I-beam. Two rows of bolt holes are opened on one side of the I-beam, and there are length scales on the other side; there are length scales on the upper surface of the crossbar I-beam (23); at the upper end of the vertical rod (8) and one end of the vertical rod chute (12), a diagonal tension channel steel (7) is used as a strengthening structure. At the connection between the bottom of the vertical rod (8) and the vertical rod chute (12), a vertical rod triangular plate (10) is provided; the bottom of the slide rail (6) is connected to the base (5) through an enlarged triangular plate (30) and a plurality of fixed bolts.

6. An assembling method using the precisely adjustable steel truss assembling falsework as described in any one of claims 1-5, characterized in that: Including the following steps:

1. Select a flat concrete assembly site and select a certain number of unit jigs (1) according to the length of the steel frame to be assembled; 2. Assemble the unit jigs (1) one by one. First, level each unit jig (1) through the leveling bolts for two unit jigs (1), and then use the fixed hinge bolts (2) and connecting rods (3) to connect and fix them; 3. Adjust the movable jaw plate (25) so that the inner rod slot plate (27) is closely attached to the fixed tooth (24). Remove the fastening bolts on the vertical rod chute (12), hoist the first main pipe of the steel truss, and adjust the positions of the vertical rods (8) on one side on the slide rail (6) so that the main pipe of the steel truss is placed on the supporting and adjusting structures (9) of the vertical rods (8) on that side; 4. Use the fastening bolts to fix the main pipe of the steel truss to the fixed vertical rod chute (12). Cooperate with the measuring instrument to adjust the elevation of each control point of the main pipe by adjusting the supporting sleeve (20) and the jack (18), and adjust the plane position of each control point through the movable jaw plate (25). Then tighten the movable jaw plate (25) to fix the main pipe of the steel truss to the preset position; 5. Repeat steps 3-4 to adjust the second main pipe of the steel truss on the other side of the vertical rod (8) to the preset position; 6. Hoist the subsequent main pipes of the steel truss to the supporting and adjusting structures (9) on the preset side, and repeat step 4 to adjust them to the preset position; 7. Weld the connecting members between the main pipes; 8. Loosen each movable jaw plate (25) until it is closely attached to the fixed tooth (24). Slightly lift the welded steel truss section with a crane so that the bottom of the main pipe of the steel truss is higher than the fixed tooth (24) of the assembly jig. Then loosen the fastening bolts on one side of the vertical rod chute (12) and move the I-beam vertical rod (8) on one side to smoothly hoist out the steel truss section; 9. Repeat steps 3-8 to assemble the next section.

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