Steel beam assembly jig frame

Abstract

The utility model relates to the field of steel bridges, in particular to a steel beam assembly jig frame which comprises a plurality of I-shaped steel arranged in parallel, and a plurality of positioning shallow grooves are formed in the upper surfaces of the left sides and the right sides of the I-shaped steel. The bottom surface of the I-shaped steel at the foremost end extends outwards to form an L-shaped plate, positioning lasers A are arranged at the positions, corresponding to the positioning shallow grooves, of a vertical plate of the L-shaped plate, positioning lasers B are arranged on the left side and the right side of the vertical plate of the L-shaped plate, and laser rays emitted by the positioning lasers B and the bottom surfaces of the straight web members or the diagonal web members are located on the same horizontal plane; a plurality of electric telescopic rods are arranged between a supporting plate and a bottom plate of the lifting bracket. The steel beam assembling jig frame can guide and position the position of a steel beam rod piece in the assembling process, the position does not need to be adjusted many times, the position placing requirement can be rapidly met, steel beam assembling is rapid and convenient, the assembling efficiency is improved, and potential safety hazards caused when an operator adjusts the position are reduced.

Description

Technical Field

[0001] The utility model relates to the field of steel bridges, in particular to a steel beam assembly frame. Background Art

[0002] Due to the high strength, light weight, and high tensile, compressive, and shear strength of steel structures, steel bridges are increasingly being used in bridges, especially long-span bridges. Steel bridges not only have a large spanning capacity and good load-bearing performance, but can also be prefabricated in factories and assembled on-site, greatly shortening the construction period. Due to the large number of steel beam components, the need for many nodes to be controlled, and the lack of aerial fulcrums, most steel beams are hoisted in sections and placed on a cradle for assembly, and then hoisted as a whole to the installation location. Currently, the cradle for on-site steel beam assembly generally uses several I-beams as the cradle, and the steel beam components are hoisted and placed on the I-beams for assembly and welding. Since the placement of the components has certain requirements, the components placed on the I-beams have no positioning or reference, so the position needs to be adjusted multiple times to meet the placement requirements. This not only reduces construction efficiency but also increases the safety risks of the operators. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a steel beam assembly cradle.

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A steel beam assembly cradle comprises a plurality of parallel I-beams, wherein two shallow positioning grooves are provided on the upper right surface of the I-beam along the width direction of the I-beam, and a plurality of shallow positioning grooves are also provided on the upper left surface of the I-beam along the width direction of the I-beam, the spacing between the two shallow positioning grooves on the right side is equal to the spacing between the two flange plates of the upper chord, the spacing between the two adjacent shallow positioning grooves on the left side is equal to the spacing between the two flange plates of the lower chord, and the width of the shallow positioning groove is equal to the thickness of the flange plate; an L-shaped plate extends outward from the bottom surface of the front end I-beam, the bottom surface of the L-shaped plate is flush with the bottom surface of the I-beam, and the position of the shallow positioning groove corresponding to the vertical plate of the L-shaped plate is Each of the L-shaped plates is provided with a positioning laser A, the laser line emitted by the positioning laser A is on the same straight line as the inner edge line or the outer edge line of the corresponding positioning shallow groove, and the left and right sides of the vertical plate of the L-shaped plate are provided with a positioning laser B, the laser line emitted by the positioning laser B is on the same horizontal plane as the bottom surface of the straight web or the diagonal web; it also includes a lifting bracket, the lifting bracket includes an upper support plate and a lower base plate, a plurality of electric telescopic rods are provided between the support plate and the base plate, the motor of the electric telescopic rod is fixed on the base plate, the upper end of the telescopic shaft of the electric telescopic rod is fixed to the bottom surface of the support plate, and the width of the support plate is less than the distance between the upper chord rod and the lower chord rod.

[0006] Preferably, the depth of the positioning shallow groove is 1-3 cm.

[0007] Preferably, there are four electric telescopic rods.

[0008] Preferably, the width of the support plate is 10-30 cm smaller than the distance between the upper chord and the lower chord.

[0009] The steel beam assembly cradle of the present invention can guide and locate the positions of the upper chord, lower chord, straight web, diagonal web and other rods of the steel beam during the assembly process, without the need to adjust the position multiple times, and can quickly meet the requirements for the placement of the rod positions, making the steel beam assembly quick and convenient, improving the assembly efficiency, and reducing the safety hazards of the operators when adjusting the position. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the embodiment during assembly.

[0011] Figure 2 This is a schematic diagram of the assembled top view structure of this embodiment.

[0012] Figure 3 This is a schematic diagram of the tire frame structure of this embodiment;

[0013] Figure 4 This is a schematic diagram of the I-beam structure at the front end of this embodiment;

[0014] Figure 5 This is a structural diagram of the lifting bracket of this embodiment.

[0015] In the figure: 1 I-beam; 2 positioning shallow groove; 3 upper chord; 4 lower chord; 5 L-shaped plate; 6 positioning laser A; 7 positioning laser B; 8 straight web; 9 diagonal web; 10 lifting bracket; 11 support plate; 12 bottom plate; 13 electric telescopic rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The steel beam assembly cradle of this embodiment includes several parallel I-beams 1. The I-beams 1 can be of the type commonly used in existing steel beam assembly cradles. However, in this embodiment, several of the I-beams 1 are provided with shallow positioning grooves 2. These grooves 2 are used to position the top chord 3 or bottom chord 4, thereby guiding the positioning of the top chord 3 or bottom chord 4. Both the top chord 3 and bottom chord 4 are H-shaped steel beams. Specifically, two shallow positioning grooves 2 are provided along the width of the I-beam 1 on the right upper surface of the I-beam 1. The two right shallow positioning grooves 2 are used to position the top chord 3. The two shallow positioning grooves 2 correspond to the two flanges of the top chord 3, respectively. The spacing between the two shallow positioning grooves 2 is equal to the spacing between the two flanges of the top chord 3. The width of the shallow positioning grooves 2 is equal to the thickness of the flanges. Preferably, the depth of the shallow positioning grooves 2 is 1-3 cm. Several shallow positioning grooves 2 are provided along the width of the I-beam 1 on the left upper surface of the I-beam 1. The left shallow positioning groove 2 is used to position the bottom chord 4. Because the spacing between the top chord 3 and bottom chord 4 varies between steel beams of different sizes, multiple shallow positioning grooves 2 are provided on the left side to facilitate adjustment of the placement of the bottom chord 4 to accommodate beams of varying spacing. Similarly, the spacing between two adjacent shallow positioning grooves 2 on the left side is equal to the spacing between the two flanges of the bottom chord 4. The width of the shallow positioning grooves 2 is equal to the thickness of the flanges of the bottom chord 4. The depth of the shallow positioning grooves 2 is preferably 1-3 cm.

[0018] An L-shaped plate 5 extends outward from the bottom surface of the front-end I-beam 1. The L-shaped plate 5 is welded to the front-end I-beam 1, and the bottom surface of the L-shaped plate 5 is flush with the bottom surface of the I-beam 1. A positioning laser A6 is provided on the vertical plate of the L-shaped plate 5 at the position corresponding to each positioning shallow groove 2. The laser line emitted by the positioning laser A6 is on the same straight line as the inner edge line or outer edge line of the corresponding positioning shallow groove 2. The inner edge line here refers to the edge close to the middle of the steel beam, and the outer edge line refers to the edge away from the middle of the steel beam. The laser line emitted by the positioning laser A6 is used to locate the position of each positioning shallow groove 2, that is, to locate the placement position of each I-beam 1. The inner edge line or outer edge line of the positioning shallow groove 2 of each I-beam 1 must be on the same straight line as the laser line emitted by the corresponding positioning laser A6.

[0019] Positioning lasers B7 are also provided on the left and right sides of the vertical plate of the L-shaped plate 5. The positioning lasers B7 are used to locate the welding position of the straight web member 8 or the diagonal web member 9. The laser line emitted by the positioning laser B7 is on the same horizontal plane as the bottom surface of the welded straight web member 8 or the diagonal web member 9. The welding position of the straight web member 8 or the diagonal web member 9 is adjusted according to the laser line emitted by the positioning laser B7.

[0020] This embodiment also includes a lifting bracket 10, which supports the straight web 8 or diagonal web 9 to be welded, and further positions and supports the straight web 8 or diagonal web 9. The above-mentioned lifting bracket 10 includes an upper support plate 11 and a lower base plate 12, and four electric telescopic rods 13 are arranged between the support plate 11 and the base plate 12, wherein the motor of the electric telescopic rod 13 is fixed on the base plate 12, and the upper end of the telescopic shaft of the electric telescopic rod 13 is fixedly connected to the bottom surface of the support plate 11. The width of the support plate 11 is smaller than the distance between the upper chord 3 and the lower chord 4, and the lifting bracket 10 can be placed between the upper chord 3 and the lower chord 4. Preferably, the width of the support plate 11 is 10-30 cm smaller than the distance between the upper chord 3 and the lower chord 4, so that the lifting bracket 10 can be conveniently placed between the upper chord 3 and the lower chord 4, and welding space can be reserved.

[0021] When assembling the steel beams, first place the frontmost I-beam 1, turn on each positioning laser A6, and then place the remaining I-beams 1 backwards at a certain distance according to the laser lines emitted by each positioning laser A6. When placing, make sure that the inner edge line or the outer edge line of the positioning shallow groove 2 on the upper surface of the I-beam 1 is on the same straight line with the laser line emitted by the corresponding positioning laser A6. After placing each I-beam 1, then hoist the upper chord 3, place the flange plates of the upper chord 3 in the two positioning shallow grooves 2 on the right side, weld the adjacent upper chords 3 together, and connect them through the steel beam. The connecting plate and high-strength bolts further connect the adjacent upper chord rods 3. After the upper chord rods 3 are assembled, the lower chord rods 4 are hoisted. According to the distance between the upper chord rods 3 and the lower chord rods 4, the two flange plates of the lower chord rods 4 are placed in the appropriate left positioning shallow groove 2. Similarly, the adjacent lower chord rods 4 are welded together and further connected with the adjacent lower chord rods 4 through the steel beam connecting plate and high-strength bolts. After the lower chord rods 4 are assembled, the straight web rod 8 needs to be welded between the upper chord rod 3 and the lower chord rod 4. At this time, turn on the positioning laser B7, and then place the lifting bracket 10 under the straight web rod 8 to be welded. The controller controls the four electric telescopic rods 13 to work simultaneously, raising the upper surface of the support plate 11 to the same level as the laser line emitted by the positioning laser B7, and then hoisting the straight web 8. The straight web 8 is placed on the lifting bracket 10 between the upper chord 3 and the lower chord 4. At this time, the bottom surface of the straight web 8 is at the same level as the laser line emitted by the positioning laser B7. The straight web 8 is located at the position where welding is required. The straight web 8 is welded. The straight web 8 is hoisted and welded in turn using the same method. After the straight web 8 is assembled, the diagonal web 9 is hoisted and welded. The bottom surface of the diagonal web 9 is flush with the bottom surface of the straight web 8. The straight web members 8 and the diagonal web members 9 are flat, so the same method can be used to adjust the position of the diagonal web members 9, and the lifting bracket 10 is used to support and position the diagonal web members 9. The lifting bracket 10 has a supporting effect when the straight web members 8 and the diagonal web members 9 are welded, avoiding the inconvenience of needing another person to hold the diagonal web members 9 for welding during the traditional method. It not only saves manpower but also ensures the accuracy of the welding position and the welding quality. After the welding of the diagonal web members 9 is completed, stiffening ribs can be welded between the straight web members 8 and the diagonal web members 9 to further strengthen the connection. After the steel beam is assembled and welded, the whole is hoisted to the bridge installation position for installation.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel beam assembly frame, comprising a plurality of parallel I-beams (1), characterized in that: Two positioning shallow grooves (2) are provided on the upper surface of the right side of the I-beam (1) along the width direction of the I-beam (1), and a plurality of positioning shallow grooves (2) are provided on the upper surface of the left side of the I-beam (1) along the width direction of the I-beam (1). The spacing between the two positioning shallow grooves (2) on the right side is equal to the spacing between the two flange plates of the upper chord (3), and the spacing between the two adjacent positioning shallow grooves (2) on the left side is equal to the spacing between the two flange plates of the lower chord (4). The width of the positioning shallow groove (2) is equal to the thickness of the flange plate. An L-shaped plate (5) extends outward from the bottom surface of the front end of the I-beam (1). The bottom surface of the L-shaped plate (5) is flush with the bottom surface of the I-beam (1). Positioning lasers A (6) are provided at positions corresponding to the positioning shallow grooves (2) on the vertical plate of the L-shaped plate (5). The positioning lasers A (6) emit The laser line and the inner edge line or the outer edge line of the corresponding positioning shallow groove (2) are on the same straight line, and positioning lasers B (7) are provided on both the left and right sides of the vertical plate of the L-shaped plate (5), and the laser line emitted by the positioning laser B (7) is on the same horizontal plane as the bottom surface of the straight web (8) or the oblique web (9); and the lifting bracket (10) is also included, and the lifting bracket (10) includes an upper support plate (11) and a lower bottom plate (12), and a plurality of electric telescopic rods (13) are provided between the support plate (11) and the bottom plate (12), and the motor of the electric telescopic rod (13) is fixed on the bottom plate (12), and the upper end of the telescopic shaft of the electric telescopic rod (13) is fixed to the bottom surface of the support plate (11), and the width of the support plate (11) is smaller than the distance between the upper chord rod (3) and the lower chord rod (4).

2. The steel beam assembly cradle according to claim 1, characterized in that: The width of the support plate (11) is 10-30 cm smaller than the distance between the upper chord (3) and the lower chord (4).

3. The steel beam assembly cradle according to claim 1, characterized in that: The positioning shallow groove (2) has a depth of 1-3 cm.

4. The steel beam assembly cradle according to claim 1, characterized in that: There are four electric telescopic rods (13).

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