Assembly process and assembly equipment for bridge steel truss girder

Abstract

The invention discloses an assembly process and assembly equipment for a bridge steel truss girder, and relates to the technical field of steel truss girder assembly, the assembly equipment comprises two groups of steel truss girder assemblies, the steel truss girder assemblies are used for supporting a bridge, and the two groups of steel truss girder assemblies are welded and connected through a stabilizing assembly; meanwhile, the two sets of stabilizing assemblies are symmetrically arranged; the distance adjusting assembly is installed in an inner cavity of the assembling table, and the assembling table is used for adjusting the distance when the steel truss girder assembly is assembled; and the limiting assembly is mounted on the distance adjusting assembly. By means of the limiting assembly and the distance adjusting assembly, the bridge steel truss girder can be limited and prevented from falling off during assembling, adjustment can be conducted according to the height of the steel truss girder assembly, meanwhile, distance fixing can be conducted during bridge assembling more conveniently, the accuracy during assembling is ensured, and therefore the stability and accuracy of the assembling technology of the bridge steel truss girder are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel truss assembly, and in particular to an assembly process and assembly equipment for bridge steel trusses. Background Art

[0002] As an important part of modern transportation construction, the quality and efficiency of bridge engineering are directly related to the smoothness and safety of transportation. With the advancement of science and technology and the continuous development of engineering technology, bridge steel trusses, as an important form of bridge structure, have been widely used in long-span bridge projects due to their advantages such as high strength, light weight and good seismic performance. However, the assembly process of bridge steel trusses and their assembly equipment face many challenges.

[0003] For example, the announcement number CN215390491 U discloses a method for installing steel trusses, which uses a floating crane to install the pier brackets on both sides of the main tower pier and the inter-section steel beams on the pier top; on the inter-section steel beams on the pier top, a beam erection crane walkway is laid and a beam erection crane is installed; after the crane lifts the new box girder assembly segment to be installed that is transported to the bridge position, it is aligned and spliced ​​with the inter-section steel beams on the pier top to complete the installation of the new box girder assembly segment unit; the crane walkway is reversed on the installed new box girder assembly segment, and the crane moves forward to lift the new box girder assembly segment to be installed that is transported to the bridge position, and it is aligned and spliced ​​with the installed new box girder assembly segment; this is repeated, the crane walkway is reversed, the crane moves forward, and all the new box girder assembly segments are lifted and installed. The present invention replaces the on-water field operation with a land factory, reduces the on-site operation on the construction site, reduces the danger of high-altitude operation, and has a short installation period, fast construction speed, and high installation quality for steel trusses. However, for the convenience of transportation, steel trusses are generally in scattered parts, which are easy to lift and assemble at high altitudes. When assembling the steel truss components on the high-altitude platform, it is not convenient to limit and adjust the spacing, which makes the assembly of the steel truss components more complicated. In addition, when assembling the steel truss on the high-altitude platform, it is not convenient to move and adjust the height due to its large size, which affects the efficiency of the steel truss assembly. Summary of the invention

[0004] The object of the present invention is to provide an assembly process and assembly equipment for bridge steel trusses to solve the problems existing in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An assembly device for steel trusses of bridges, comprising a steel truss assembly, wherein the steel truss assembly is used to support the bridge, wherein two groups of the steel truss assemblies are provided and are welded and connected by a stabilizing assembly, and wherein two groups of the stabilizing assemblies are provided and are symmetrically arranged;

[0007] A spacing adjustment component, the spacing adjustment component is installed in the inner cavity of the assembly table, and the assembly table is used to adjust the spacing when assembling the steel truss girder assembly;

[0008] A limiting assembly is installed on the spacing adjustment assembly, and is used to limit the steel truss assembly during assembly and to adjust according to the height of the steel truss assembly.

[0009] As a further solution of the present invention: the spacing adjustment assembly includes a bidirectional motor, the bidirectional motor is fixed to the bottom of the assembly table, both ends of the bidirectional motor are fixedly connected to a transmission shaft, and the surface of the transmission shaft is fixedly connected to two worms, and one side of the worm is meshed with a worm wheel, and the middle of the worm wheel is fixedly installed with a bidirectional lead screw;

[0010] A movable plate, wherein the movable plate is provided with two groups and is threadedly connected to the surface of the bidirectional screw rod;

[0011] The limiting plates are fixed to the bottom of the assembly platform, and two groups of the limiting plates are arranged symmetrically.

[0012] As a further solution of the present invention: the transmission shaft is slidably connected to the middle part of the limit plate, the bidirectional screw is movably connected to the assembly table, the movable plate slides in the slide grooves opened on both sides of the assembly table, and the bidirectional screw is installed in the slide grooves opened on the assembly table.

[0013] As a further solution of the present invention: the limit assembly includes a positioning block, the positioning block is fixed to the top of the movable plate, support blocks are slidably connected in the slide grooves provided on both sides of the positioning block, and an extension block is slidably connected in the support block, and a contact plate is fixedly installed on one side of the top of the extension block;

[0014] A limit pin, which is used to limit the extension block and the support block;

[0015] A telescopic rod, one side of which is fixedly installed in a sliding groove provided in a positioning block, and the other side of which is fixed on a supporting block, and a spring is sleeved on the telescopic rod.

[0016] As a further solution of the present invention: the steel truss assembly comprises an upper main beam, the upper main beam is arranged on the top of the secondary beam, and the secondary beams are provided in two groups and are symmetrically arranged;

[0017] A lower main beam, wherein the lower main beam is arranged at the bottom of the auxiliary beam;

[0018] A support beam, wherein the support beam is arranged in the middle of the upper main beam and the lower main beam;

[0019] The oblique beam is arranged between the auxiliary beam and the supporting beam, and the supporting beam is provided with two groups and is symmetrically arranged.

[0020] As a further solution of the present invention: the stabilizing assembly includes a connecting beam, the connecting beam is connected to one side of the upper main beam, and the connecting beam is provided in two groups and is symmetrically arranged;

[0021] A crossbeam is installed between two groups of connecting beams.

[0022] As a further solution of the present invention: bases are fixedly installed around the bottom of the assembly table, and an adjustment component is installed on the assembly table. The adjustment component is used to adjust and dock the steel truss component with the stabilizing component.

[0023] As a further solution of the present invention: the adjustment assembly includes a transverse limiting column, the transverse limiting column is fixed in a slide groove opened on both sides of the assembly table, the surface of the transverse limiting column is slidably connected to a first slider, and a support rod is fixedly installed on the first slider, and a fixed block is fixedly connected to the top of the support rod;

[0024] A longitudinal limiting column, wherein the longitudinal limiting column is fixed in a sliding groove provided in the fixed block, a second sliding block is slidably connected to the surface of the longitudinal limiting column, and a connecting cylinder is rotatably connected in the second sliding block;

[0025] A winch is fixed on one side of a connecting cylinder, an output end of the winch is fixedly connected to a connecting shaft, both sides of the connecting shaft are fixedly wound with steel wire ropes, and the steel wire ropes pass through a square groove in the connecting cylinder to wind around the bridge mounting components.

[0026] As a further solution of the present invention: the connecting shaft is movably installed in the connecting cylinder, the first sliding block slides through the sliding grooves opened on both sides of the assembly table, and the second sliding block slides through the sliding grooves opened in the fixed block.

[0027] The present invention also discloses an assembly process for a bridge steel truss, comprising the following steps:

[0028] The upper main beam and the lower main beam are fixed and limited by two sets of limit assemblies respectively;

[0029] The two sets of limit assemblies are controlled to move by the spacing adjustment assembly, so as to adjust the spacing between the components of the two sets of limit assemblies;

[0030] The parts of the bridge to be assembled are connected by adjusting the components;

[0031] The assembled steel truss components and the stabilizing components are stabilized by welding.

[0032] Beneficial effects of the present invention:

[0033] (1) The present invention uses a limiting assembly and a spacing adjustment assembly to limit the position of the bridge steel truss during assembly to prevent it from falling off and can be adjusted according to the height of the steel truss assembly. At the same time, it is more convenient to determine the distance during bridge assembly to ensure the accuracy of assembly, thereby improving the stability and accuracy of the assembly process of the bridge steel truss;

[0034] (2) The present invention arranges an adjustment component, wherein the fixed block, the longitudinal limit column, the second slider, the connecting tube, the connecting shaft and the steel wire rope cooperate with each other in movement, so that the steel trusses of the bridge can be moved and adjusted in the horizontal and longitudinal directions and in height during assembly, thereby improving the flexibility and adjustability of the assembly process of the steel trusses of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 It is a three-dimensional structural schematic diagram of an assembly device for bridge steel trusses of the present invention;

[0037] Figure 2 It is a bottom view of the three-dimensional structure of an assembly device for bridge steel trusses of the present invention;

[0038] Figure 3 It is a schematic diagram of the combined structure of the steel truss assembly and the stabilizing assembly of the present invention;

[0039] Figure 4 It is a schematic diagram of the split structure of the steel truss assembly and the stabilizing assembly of the present invention;

[0040] Figure 5 It is a three-dimensional structural schematic diagram of the spacing adjustment component of the present invention;

[0041] Figure 6 It is a three-dimensional structural schematic diagram of the limiting component of the present invention;

[0042] Figure 7 It is a schematic diagram of the structural disassembly of the limit assembly of the present invention;

[0043] Figure 8 It is a three-dimensional structural schematic diagram of the adjustment component of the present invention;

[0044] Fig. 9 It is a schematic diagram of the cross-sectional structure of the regulating component of the present invention.

[0045] In the figure: 1, assembly table; 2, base; 3, steel truss assembly; 300, upper main beam; 301, auxiliary beam; 302, lower main beam; 303, inclined beam; 304, support beam; 4, stabilizing assembly; 400, cross beam; 401, connecting beam; 5, adjusting assembly; 500, horizontal limit column; 501, first slider; 502, support rod; 503, fixing block; 504, longitudinal limit column; 505, second slider; 506, connecting tube; 507, Winch; 508, connecting shaft; 509, wire rope; 510, square groove; 6, limit assembly; 600, positioning block; 601, support block; 602, extension block; 603, contact plate; 604, telescopic rod; 605, spring; 606, limit pin; 7, spacing adjustment assembly; 700, bidirectional motor; 701, transmission shaft; 702, limit plate; 703, worm; 704, worm wheel; 705, bidirectional lead screw; 706, moving plate. DETAILED DESCRIPTION

[0046] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0047] Embodiment 1

[0048] See also Figure 1-Figure 9 As shown, the present invention is an assembly device for steel trusses of bridges, comprising a steel truss assembly 3, the steel truss assembly 3 is used to support the bridge, the steel truss assembly 3 is provided with two groups and is welded and connected by a stabilizing assembly 4, and the stabilizing assembly 4 is provided with two groups and is symmetrically arranged;

[0049] A spacing adjustment component 7, the spacing adjustment component 7 is installed in the inner cavity of the assembly table 1, and the assembly table 1 is used to adjust the spacing when assembling the steel truss girder component 3;

[0050] The limiting assembly 6 is installed on the spacing adjustment assembly 7. The limiting assembly 6 is used to limit the steel truss assembly 3 during assembly and to adjust according to the height of the steel truss assembly 3.

[0051] In the present invention, preferably, the spacing adjustment component 7 includes a bidirectional motor 700, which is fixed to the bottom of the assembly table 1, and both ends of the bidirectional motor 700 are fixedly connected to a transmission shaft 701, and the surface of the transmission shaft 701 is fixedly connected to two worms 703, and one side of the worm 703 is meshed with a worm wheel 704, and the middle of the worm wheel 704 is fixedly installed with a bidirectional screw 705;

[0052] The movable plate 706 is provided with two groups and is threadedly connected to the surface of the bidirectional screw rod 705;

[0053] The limiting plates 702 are fixed to the bottom of the assembly platform 1 . There are two groups of limiting plates 702 which are symmetrically arranged.

[0054] In the present invention, preferably, the transmission shaft 701 is slidably connected to the middle part of the limit plate 702, the bidirectional screw rod 705 is movably connected to the assembly table 1, the movable plate 706 slides in the slide grooves opened on both sides of the assembly table 1, and the bidirectional screw rod 705 is installed in the slide grooves opened in the assembly table 1.

[0055] In the present invention, preferably, the limiting assembly 6 includes a positioning block 600, the positioning block 600 is fixed to the top of the movable plate 706, the supporting blocks 601 are slidably connected in the slide grooves provided on both sides of the positioning block 600, and the extension block 602 is slidably connected in the support block 601, and a contact plate 603 is fixedly installed on one side of the top of the extension block 602;

[0056] A limit pin 606, which is used to limit the extension block 602 and the support block 601;

[0057] The telescopic rod 604 has one side fixedly installed in the slide groove provided in the positioning block 600 , and the other side of the telescopic rod 604 is fixed on the supporting block 601 . A spring 605 is sleeved on the telescopic rod 604 .

[0058] It should be noted that a pulling handle is fixedly installed on one side of the support block 601 , a plurality of limiting holes are provided on the support block 601 for adjusting the height, and a positioning hole is provided in the extension block 602 .

[0059] During the implementation process, first pull the two sets of handles, and both sets of handles carry the support blocks 601 to move along the slide grooves opened on both sides of the positioning block 600 to squeeze the telescopic rod 604 and the spring 605, and put the upper main beam 300 on one set of limiting components 6. Release the handles, and through the reverse thrust of the telescopic rod 604 and the spring 605, the support blocks 601 on both sides move inward along the slide grooves opened in the positioning block 600 to clamp and limit the upper main beam 300 on the positioning block 600. Repeat the operation to clamp and limit the lower main beam 302 on the other set of limiting components 6. When the replaced assembled steel truss beam assembly 3 is placed on the positioning block 600, remove the limit pin 606, pull the extension block 602, and the extension block 602 carries the contact plate 603 to move upward along the support block 601, so that the bridge can be adjusted according to the height of the steel truss beam assembly 3 during assembly.

[0060] A bidirectional motor 700 is provided, and the output end of the bidirectional motor 700 drives a transmission shaft 701 to rotate, and the transmission shaft 701 drives two sets of worms 703 to rotate along the middle part of the limit plate 702, and the worms 703 drive two sets of worm wheels 704 to rotate, and the two sets of worm wheels 704 drive two sets of bidirectional lead screws 705 to rotate, and the two sets of bidirectional lead screws 705 drive the movable plates 706 on both sides to move inward or outward, and the two sets of movable plates 706 drive the two sets of positioning blocks 600 to move inward or outward, and the two sets of positioning blocks 600 drive the upper main beam 300 and the lower main beam 302 to move inward or outward to adjust the spacing, so that it is easier to determine the distance when assembling the bridge to ensure the accuracy during assembly.

[0061] Embodiment 2

[0062] In the present invention, preferably, the steel truss assembly 3 includes an upper main beam 300, which is arranged on the top of the auxiliary beam 301, and the auxiliary beam 301 is provided in two groups and is symmetrically arranged;

[0063] A lower main beam 302, which is arranged at the bottom of the auxiliary beam 301;

[0064] A support beam 304, the support beam 304 is disposed at the middle of the upper main beam 300 and the lower main beam 302;

[0065] The oblique beam 303 is disposed between the auxiliary beam 301 and the supporting beam 304 . The supporting beam 304 is provided with two groups and is symmetrically arranged.

[0066] It should be noted that the inclined beam 303 is arranged at an angle, one side of the inclined beam 303 is connected to the auxiliary beam 301 by welding, and the other side of the auxiliary beam 301 is welded to the support beam 304, and the upper main beam 300, the lower main beam 302 and the auxiliary beam 301, the inclined beam 303, and the support beam 304 are connected at the connection points, which are convenient for accurate welding after positioning and connection.

[0067] In the present invention, preferably, the stabilizing assembly 4 includes a connecting beam 401, the connecting beam 401 is connected to one side of the upper main beam 300, and the connecting beam 401 is provided in two groups and is symmetrically arranged;

[0068] The cross beam 400 is installed between two sets of connecting beams 401 .

[0069] It should be noted that a connecting groove is provided in the connecting beam 401 to facilitate welding after the cross beam 400 is placed and positioned, and both sides of the cross beam 400 are welded to one side of the upper main beam 300 and the lower main beam 302.

[0070] During the implementation process, firstly, two groups of auxiliary beams 301 are placed between the upper main beam 300 and the lower main beam 302 and are limited by limiting columns passing through the connecting holes; two groups of inclined beams 303 are placed at the connection between the auxiliary beam 301 and the supporting beam 304 and are limited by limiting columns passing through them; after the components are connected by welding, the limiting columns are removed, the cross beam 400 is welded between the two connecting beams 401, and the assembled two groups of steel truss beam assemblies 3 and the assembled stabilizing assembly 4 are welded through the connecting beam 401 between the two upper main beams 300 and the lower main beam 302 to complete the assembly.

[0071] Embodiment 3

[0072] In the present invention, preferably, a base 2 is fixedly installed around the bottom of the assembly table 1, and an adjustment component 5 is installed on the assembly table 1. The adjustment component 5 is used to adjust and dock the steel truss component 3 and the stabilizing component 4 when they are assembled.

[0073] In the present invention, preferably, the adjustment assembly 5 includes a transverse limiting column 500, which is fixed in a slide groove provided on both sides of the assembly platform 1, and a first slider 501 is slidably connected to the surface of the transverse limiting column 500, and a support rod 502 is fixedly installed on the first slider 501, and a fixing block 503 is fixedly connected to the top of the support rod 502;

[0074] A longitudinal limiting column 504, the longitudinal limiting column 504 is fixed in a slide groove provided in the fixed block 503, a second slider 505 is slidably connected to the surface of the longitudinal limiting column 504, and a connecting tube 506 is rotatably connected inside the second slider 505;

[0075] The winch 507 is fixed on one side of the connecting tube 506, and the output end of the winch 507 is fixedly connected with a connecting shaft 508, and both sides of the connecting shaft 508 are fixedly wound with a steel wire rope 509, and the steel wire rope 509 passes through the connecting tube 506 to open a square groove 510 to wind around the bridge installation component.

[0076] During the implementation process, when it is necessary to move and position one of the components of the steel truss assembly 3 and the stabilizing assembly 4 in terms of height and position, the exposed ends of the two sets of steel wire ropes 509 are wound around the components to be assembled, and the support rod 502 is pulled. The support rod 502 moves the first slider 501 laterally along the lateral limit column 500 and the slide groove of the assembly table 1. The support rod 502 moves the fixed block 503, the longitudinal limit column 504, the second slider 505, the connecting tube 506, the connecting shaft 508, the steel wire rope 509 and the wound components. Move horizontally to push the connecting tube 506, and the connecting tube 506 moves longitudinally along the sliding groove opened by the longitudinal limit column 504 and the fixed block 503 with the second slider 505, and the second slider 505 moves longitudinally with the connecting tube 506, the connecting shaft 508, the wire rope 509 and the wound parts, and a winch 507 is set, and the winch 507 rotates with the connecting shaft 508 to make the wire rope 509 wind or loosen along the connecting shaft 508, so that the wire rope 509 moves upward and then downward with the assembled parts of the bridge to adjust the height.

[0077] In the present invention, preferably, the connecting shaft 508 is movably installed in the connecting cylinder 506 , the first slider 501 slides through the slide grooves opened on both sides of the assembly table 1 , and the second slider 505 slides through the slide grooves opened in the fixed block 503 .

[0078] The present invention also discloses an assembly process for a bridge steel truss, comprising the following steps:

[0079] The upper main beam 300 and the lower main beam 302 are fixed and limited by two sets of limit assemblies 6 respectively;

[0080] The two groups of limit assemblies 6 are controlled to move by the spacing adjustment assembly 7, so as to adjust the spacing between the components of the two groups of limit assemblies 6;

[0081] The parts of the bridge to be assembled are butted together by adjusting the assembly 5;

[0082] The assembled steel truss assembly 3 and the stabilizing assembly 4 are stabilized by welding.

[0083] The assembly process and principle of the present invention are as follows: first, pull the two sets of handles, and both sets of handles carry the support blocks 601 to move along the slide grooves opened on both sides of the positioning block 600 to squeeze the telescopic rod 604 and the spring 605, and put the upper main beam 300 on one set of limiting components 6, release the handles, and through the reverse thrust of the telescopic rod 604 and the spring 605, the support blocks 601 on both sides move inward along the slide grooves opened in the positioning block 600 to clamp and limit the upper main beam 300 on the positioning block 600, repeat the operation to clamp and limit the lower main beam 302 on the other set of limiting components 6, and when the replaced assembled steel truss beam assembly 3 is placed on the positioning block 600, remove the limit pin 606, pull the extension block 602, and the extension block 602 carries the contact plate 603 to move upward along the support block 601, so that the bridge can be adjusted according to the height of the steel truss beam assembly 3 during assembly;

[0084] A bidirectional motor 700 is provided, the output end of the bidirectional motor 700 drives a transmission shaft 701 to rotate, the transmission shaft 701 drives two sets of worms 703 to rotate along the middle of the limit plate 702, the worms 703 drive two sets of worm wheels 704 to rotate, the two sets of worm wheels 704 drive two sets of bidirectional screw rods 705 to rotate, the two sets of bidirectional screw rods 705 drive the moving plates 706 on both sides to move inward or outward, the two sets of moving plates 706 drive the two sets of positioning blocks 600 to move inward or outward, the two sets of positioning blocks 600 drive the upper main beam 300 and the lower main beam 302 to move outward or inward to adjust the spacing, so that it is easier to determine the distance when assembling the bridge, so as to ensure the accuracy during assembly;

[0085] When it is necessary to move and position one of the components of the steel truss assembly 3 and the stabilizing assembly 4, the exposed ends of the two sets of steel wire ropes 509 are wound around the component to be assembled, and the support rod 502 is pulled. The support rod 502 moves the first slider 501 laterally along the transverse limiting column 500 and the slide groove of the assembly table 1, and the support rod 502 moves the fixed block 503, the longitudinal limiting column 504, the second slider 505, the connecting tube 506, the connecting shaft 508, the steel wire rope 509 and the wound component laterally. The connecting cylinder 506 is pushed, and the connecting cylinder 506 moves longitudinally along the slide groove formed by the longitudinal limit column 504 and the fixed block 503 with the second slider 505, and the second slider 505 moves longitudinally with the connecting cylinder 506, the connecting shaft 508, the wire rope 509 and the wound parts, and a winch 507 is set, and the winch 507 rotates with the connecting shaft 508 to make the wire rope 509 wind or loosen along the connecting shaft 508, so that the wire rope 509 moves upward and then downward with the assembled parts of the bridge to adjust the height;

[0086] Place the two sets of auxiliary beams 301 between the upper main beam 300 and the lower main beam 302 and use limit columns to pass through the connecting holes for limiting. Place the two sets of inclined beams 303 at the connection between the auxiliary beam 301 and the supporting beam 304 and use limit columns to pass through for limiting. After connecting the components by welding, remove the limit columns, weld the cross beam 400 between the two connecting beams 401, and weld the assembled two sets of steel truss beam assemblies 3 and the assembled stabilizing assembly 4 through the connecting beam 401 between the two upper main beams 300 and the lower main beam 302 to complete the assembly.

[0087] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An assembly device for bridge steel trusses, characterized in that: It comprises a steel truss girder assembly (3), wherein the steel truss girder assembly (3) is used to support the bridge, wherein two groups of the steel truss girder assembly (3) are provided and are welded and connected via a stabilizing assembly (4), and wherein two groups of the stabilizing assembly (4) are provided and are symmetrically arranged; A spacing adjustment component (7), the spacing adjustment component (7) being installed in the inner cavity of the assembly platform (1), the assembly platform (1) being used to adjust the spacing when assembling the steel truss beam component (3); A limiting component (6), wherein the limiting component (6) is installed on the spacing adjustment component (7), and the limiting component (6) is used to limit the steel truss component (3) during assembly and to adjust according to the height of the steel truss component (3).

2. The assembly equipment for bridge steel trusses according to claim 1, characterized in that: The spacing adjustment assembly (7) comprises a bidirectional motor (700), the bidirectional motor (700) being fixed to the bottom of the assembly platform (1), the two ends of the bidirectional motor (700) being fixedly connected to a transmission shaft (701), and the surface of the transmission shaft (701) being fixedly connected to two worms (703), while one side of the worm (703) is meshingly connected to a worm wheel (704), and a bidirectional lead screw (705) is fixedly installed in the middle of the worm wheel (704); A movable plate (706), wherein the movable plate (706) is provided in two groups and is threadedly connected to the surface of the bidirectional screw rod (705); The limiting plates (702) are fixed to the bottom of the assembly platform (1), and two groups of the limiting plates (702) are arranged symmetrically.

3. The assembly equipment for bridge steel trusses according to claim 2, characterized in that: The transmission shaft (701) is slidably connected to the middle part of the limit plate (702), the bidirectional screw rod (705) is movably connected to the assembly platform (1), the movable plate (706) slides in the slide grooves opened on both sides of the assembly platform (1), and the bidirectional screw rod (705) is installed in the slide grooves opened on the assembly platform (1).

4. The assembly equipment for bridge steel trusses according to claim 1, characterized in that: The limiting assembly (6) comprises a positioning block (600), wherein the positioning block (600) is fixed to the top of the movable plate (706), and a support block (601) is slidably connected in a slide groove provided on both sides of the positioning block (600), and an extension block (602) is slidably connected in the support block (601), and a contact plate (603) is fixedly installed on one side of the top of the extension block (602); A limiting pin (606), wherein the limiting pin (606) is used to limit the extension block (602) and the support block (601); A telescopic rod (604), one side of the telescopic rod (604) is fixedly installed in a sliding groove provided in a positioning block (600), the other side of the telescopic rod (604) is fixed on a supporting block (601), and a spring (605) is sleeved on the telescopic rod (604).

5. The assembly equipment for bridge steel trusses according to claim 1, characterized in that: The steel truss assembly (3) comprises an upper main beam (300), wherein the upper main beam (300) is arranged on the top of a secondary beam (301), and the secondary beams (301) are provided in two groups and are symmetrically arranged; A lower main beam (302), wherein the lower main beam (302) is arranged at the bottom of the auxiliary beam (301); A support beam (304), wherein the support beam (304) is arranged at a middle portion of the upper main beam (300) and the lower main beam (302); The inclined beams (303) are arranged between the auxiliary beams (301) and the support beams (304). The support beams (304) are provided in two groups and are symmetrically arranged.

6. The assembly equipment for bridge steel trusses according to claim 1, characterized in that: The stabilizing component (4) comprises a connecting beam (401), wherein the connecting beam (401) is connected to one side of the upper main beam (300), and the connecting beam (401) is provided in two groups and is symmetrically arranged; A crossbeam (400) is installed between two groups of connecting beams (401).

7. The assembly equipment for bridge steel trusses according to claim 1, characterized in that: Bases (2) are fixedly installed around the bottom of the assembly platform (1), and an adjustment component (5) is installed on the assembly platform (1). The adjustment component (5) is used to adjust and dock the steel truss component (3) and the stabilization component (4).

8. The assembly equipment for bridge steel trusses according to claim 7, characterized in that: The adjustment assembly (5) comprises a transverse limiting column (500), wherein the transverse limiting column (500) is fixed in a slide groove provided on both sides of the assembly platform (1), a first sliding block (501) is slidably connected to the surface of the transverse limiting column (500), a support rod (502) is fixedly mounted on the first sliding block (501), and a fixing block (503) is fixedly connected to the top of the support rod (502); A longitudinal limiting column (504), wherein the longitudinal limiting column (504) is fixed in a sliding groove provided in the fixed block (503), a second sliding block (505) is slidably connected to the surface of the longitudinal limiting column (504), and a connecting tube (506) is rotatably connected inside the second sliding block (505); A winch (507) is fixed to one side of a connecting tube (506), an output end of the winch (507) is fixedly connected to a connecting shaft (508), both sides of the connecting shaft (508) are fixedly wound with a steel wire rope (509), and the steel wire rope (509) passes through a square groove (510) provided in the connecting tube (506) to wind around a bridge installation component.

9. The assembly equipment for bridge steel trusses according to claim 8, characterized in that: The connecting shaft (508) is movably installed in the connecting cylinder (506), the first sliding block (501) slides through the sliding grooves provided on both sides of the assembly platform (1), and the second sliding block (505) slides through the sliding grooves provided on the fixed block (503).

10. An assembly process for a steel truss bridge, characterized in that: An assembly device for bridge steel trusses according to any one of claims 1 to 9 comprises the following steps: The upper main beam (300) and the lower main beam (302) are fixed and limited respectively by two sets of limit assemblies (6); The two groups of limit assemblies (6) are controlled to move by the spacing adjustment assembly (7) so as to adjust the spacing of the components of the two groups of limit assemblies (6); The parts of the bridge to be assembled are butted together by adjusting the assembly (5); The assembled steel truss assembly (3) and the stabilizing assembly (4) are stabilized by welding.

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