Steel box girder assembling device and method

Abstract

The invention discloses a steel box girder assembling device and method.The steel box girder assembling device comprises an assembling platform formed by a plurality of steel box girder assembling units, and the assembling platform formed by the plurality of steel box girder assembling units is arranged on a concrete system platform; the steel box girder assembling unit comprises a bottom plate unit and a steel box girder support unit movably connected with the bottom plate unit. A bottom supporting sealing plate is arranged on the steel box girder support, a guide frame is arranged on the end face of the bottom supporting sealing plate in the longitudinal direction, the guide frame can move in the transverse direction of the bottom supporting sealing plate, and a steel box girder assembling frame is further arranged on the bottom supporting sealing plate. The steel box girder assembling frames are arranged on the bottom supporting sealing plate in a movable mode, the steel box girder assembling frames are symmetrically arranged, limiting vertical plates are arranged on the outer sides of the steel box girder assembling frames, pushing air cylinders are arranged outside the limiting vertical plates, and the output ends of the pushing air cylinders are connected with the limiting vertical plates.

Description

Technical Field

[0001] The invention belongs to the technical field of construction, and in particular relates to a steel box girder assembly device and method. Background Art

[0002] Steel box girder, also known as steel plate box girder, is a common structural form for long-span bridges. It is generally used on bridges with larger spans. It is called steel box girder because it looks like a box. Steel box girder is generally made of top plate, bottom plate, web plate, transverse diaphragm, longitudinal diaphragm and stiffening ribs connected by full welding.

[0003] The traditional assembly method is generally carried out outdoors. The various sections of the steel box girder are transported to the construction site, welded and assembled on site, and then installed on the piers. However, due to the different sizes of steel box girders, the welding workload on the installation site is very large, and outdoor operations are also greatly affected by environmental factors and weather. Moreover, a large amount of welding work needs to be completed at high altitudes, which is extremely dangerous. In the process of making the box girder, it is often necessary to first make a box girder frame, lay steel bars on the box girder frame, and then make concrete in the frame. Since the box girder sizes used in different bridge structures are inconsistent, building a frame according to the required box girder size at the construction site will greatly affect the construction progress.

[0004] In view of the above factors, a steel box girder assembly device and method are provided. The steel box girder assembly device comprises an assembly platform formed by a plurality of steel box girder assembly units and is arranged on a concrete system platform, which can perform rapid assembly and welding, and is convenient for disassembly and transportation, thereby reducing the amount of high-altitude welding work and the risk factor. Summary of the invention

[0005] The object of the present invention is to provide a steel box girder assembly device and method to solve the problems raised in the above background technology.

[0006] The objective of the present invention is achieved through the following technical solutions: a steel box girder assembly device, comprising an assembly platform formed by a plurality of steel box girder assembly units, the assembly platform formed by the plurality of steel box girder assembly units being arranged on a concrete system platform, the steel box girder assembly units comprising a bottom plate unit and a steel box girder support unit movably connected to the bottom plate unit;

[0007] The steel box beam support is provided with a bottom support sealing plate, and a guide frame is provided in the longitudinal direction of the end surface of the bottom support sealing plate, and the guide frame can move in the transverse direction along the bottom support sealing plate;

[0008] A steel box girder assembly frame is also provided on the bottom support cover plate, and the steel box girder assembly frame is movably arranged on the bottom support cover plate. The steel box girder assembly frame is symmetrically arranged, and a limiting vertical plate is provided on the outer side of the steel box girder assembly frame. A pushing cylinder is provided outside the limiting vertical plate, and the output end of the pushing cylinder is connected to the limiting vertical plate.

[0009] Furthermore, a steel box girder assembly area is provided on the bottom support cover plate, the steel box girder assembly area is a concave structure on the bottom support cover plate, and the steel box girder assembly frame is symmetrically located on both sides of the steel box girder assembly area;

[0010] A movable support plate is arranged on the steel box beam assembly area, and the movable support plate is matched with the steel box beam assembly area through a slide groove / slider.

[0011] Furthermore, the assembly platform formed by the plurality of steel box beam assembly units can move on the concrete system platform, and the bottom of the assembly platform formed by the plurality of steel box beam assembly units is provided with symmetrical slide grooves, which are inlaid and matched with the guide blocks on the concrete system platform.

[0012] Furthermore, positioning supports are arranged on both sides of the concrete system platform at positions corresponding to a number of steel box girder assembly units, and positioning pin holes cooperating with the positioning supports are arranged on both sides of each steel box girder assembly unit. The positioning support is a hydraulic cylinder, and a positioning pin rod cooperating with the positioning pin hole is arranged at the output end of the hydraulic cylinder.

[0013] Furthermore, the two side columns of the guide frame are arranged in a telescopic structure, and the two side columns of the guide frame are provided with guide beams;

[0014] The guide beam is provided with a guide unit, which includes a fixed guide rod and a movable guide rod. The fixed guide rod is located in the middle of the guide beam, and the movable guide rod is located on both sides of the fixed guide and can move on the guide beam.

[0015] Furthermore, through grooves are provided on both sides of the guide beam, and movable guide rods of the guide unit are installed in the through grooves;

[0016] The movable guide rod includes an auxiliary sleeve, the upper end surface of the auxiliary sleeve is fixedly provided with a mounting platform, the mounting platform is fixedly provided with a top extension cylinder, the output end of the top extension cylinder passes through the mounting platform and extends into the auxiliary sleeve, the auxiliary sleeve extends downward through the through groove, and the auxiliary sleeve is provided with a threaded section, and the upper and lower end surfaces that contact the guide beam are connected and fixed by bolts.

[0017] Furthermore, a clamping frame is arranged in the auxiliary sleeve, and the clamping frame is a cylindrical structure, and a clamping groove is arranged on the cylindrical structure, and the clamping groove is clamped and connected with the splicing frame constituting the steel box girder;

[0018] The end position of the clamping frame is connected to the output end of the jacking cylinder fixedly arranged on the mounting platform.

[0019] Furthermore, the steel box girder support is hollow inside, and the partition support provided at intervals is in contact with the bottom support cover plate;

[0020] The steel box beam support is in an inverted trapezoidal structure, and the steel box beam support is fixedly connected to the bottom plate unit.

[0021] The application method of the steel box girder assembly device comprises the following steps:

[0022] An assembly platform formed by a plurality of steel box beam assembly units is arranged on a concrete system platform;

[0023] A symmetrical slide groove is arranged at the bottom of the assembly platform formed by a plurality of steel box beam assembly units, and the slide groove is inlaid and matched with the guide block on the concrete system platform, so that the assembly platform formed by the plurality of steel box beam assembly units can move on the concrete system platform;

[0024] Positioning supports are arranged on both sides of the concrete system platform at positions corresponding to a number of steel box beam assembly units, and positioning pin holes cooperating with the positioning supports are arranged on both sides of each steel box beam assembly unit. The positioning support is a hydraulic cylinder, and a positioning pin rod cooperating with the positioning pin hole is arranged at the output end of the hydraulic cylinder;

[0025] When in use, a positioning pin rod matched with a positioning pin hole is provided at the output end of the hydraulic cylinder to position and support a plurality of steel box girder assembly units;

[0026] When the assembled steel box beam needs to be transferred in the use state, the positioning pin rod is retracted from the positioning pin hole to both sides by the hydraulic cylinder, and the bottom of the assembly platform formed by the steel box beam assembly unit is provided with symmetrical sliding grooves, which can be inlaid with the guide blocks on the concrete system platform to slide;

[0027] A steel box girder assembly area is provided on the bottom support cover plate, the steel box girder assembly area is a concave structure on the bottom support cover plate, and the steel box girder assembly frame is located symmetrically on both sides of the steel box girder assembly area;

[0028] When the steel box girder is assembled, a movable support plate is arranged on the assembly area of ​​the steel box girder, and the movable support plate and the assembly area of ​​the steel box girder are matched through a slide groove / slider;

[0029] In the use state, the movable support plate and the steel box girder assembly area can be short-term moved for docking through the slide groove / slider. At the same time, in the positioning state, the connection position between the movable support plate and the steel box girder assembly area is positioned by pins;

[0030] When the steel box beam is assembled, a guide frame is arranged on each steel box beam assembly unit, and the guide frame is arranged along the longitudinal direction of the end surface of the bottom support cover plate;

[0031] The guide frame can move in the transverse direction along the bottom support sealing plate, and through grooves are provided on both sides of the guide beam, and movable guide rods of the guide unit are installed in the through grooves;

[0032] The movable guide rod comprises an auxiliary sleeve, a mounting platform is fixedly arranged on the upper end surface of the auxiliary sleeve, a top extension cylinder is fixedly arranged on the mounting platform, the output end of the top extension cylinder passes through the mounting platform and extends into the auxiliary sleeve, the auxiliary sleeve passes through the through slot and extends downward, and a threaded section is arranged on the auxiliary sleeve, and the upper and lower end surfaces that contact the guide beam are connected and fixed by bolts;

[0033] A clamping frame is arranged in the auxiliary sleeve, and the clamping frame is a cylindrical structure. A clamping groove is arranged on the cylindrical structure. The clamping groove is clamped and connected with the splicing frame constituting the steel box girder. The end position of the clamping frame is connected with the output end of the jacking cylinder fixedly arranged on the installation platform.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In order to facilitate the adjustment according to the height of the steel box girder by setting a guide frame in the use state, the present invention adopts a telescopic structure for the two side columns of the guide frame, and a guide beam is arranged on the two side columns of the guide frame. A guide unit is arranged on the guide beam, and the guide unit includes a fixed guide rod and a movable guide rod. The fixed guide rod is located in the middle position of the guide beam, and the movable guide rod is located on both sides of the fixed guide rod and can move on the guide beam. The above-mentioned guide frame is provided with a fixed guide rod and a movable guide rod, and the fixed guide rod is at the middle position to vertically fix the rib plate of the steel box girder when it is assembled, and the movable guide rod is located on both sides of the fixed guide rod to fix the rib plate of the assembled steel box girder on both sides of the steel box girder, and through grooves are arranged on both sides of the guide beam.

[0036] The present invention is operated in an assembling manner, is less restricted by sites, has high flexibility, can be adjusted at any time according to the size of the steel box girder, is easy to assemble and disassemble, and can be reused many times.

[0037] The steel box beam assembly device of the present invention comprises an assembly platform formed by a plurality of steel box beam assembly units and arranged on a concrete system platform, which can be quickly assembled and welded, and is convenient for disassembly and transportation, thereby reducing the amount of high-altitude welding work and the risk factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0039] Figure 2 It is a schematic diagram of the coordination between the assembly platform of the present invention and the concrete system platform;

[0040] Figure 3 This is a schematic diagram of the connection between the guide beam and the guide unit of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the chute of the assembly platform of the present invention;

[0042] Figure 5 It is a side view schematic diagram of an assembly platform formed by assembling units of steel box beams of the present invention;

[0043] Figure 6 It is a schematic diagram of an assembly platform formed by assembling units of steel box beams of the present invention;

[0044] Figure 7 is a schematic diagram of a guide unit of the present invention;

[0045] Figure 8 This is a schematic diagram of the cooperation between the guide unit and the rib plate of the present invention;

[0046] Fig. 9 It is a schematic diagram of a guide beam of the present invention having a through groove;

[0047] Fig.10 It is an enlarged schematic diagram of the card-joint frame of the present invention;

[0048] Fig.11 It is an enlarged schematic diagram of the steel box girder assembly area having a movable support plate according to the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Specific embodiment 1

[0053] like Figure 1-11 As shown, a steel box girder assembly device includes an assembly platform A formed by a plurality of steel box girder assembly units, the assembly platform A formed by the plurality of steel box girder assembly units is arranged on a concrete system platform B, and the steel box girder assembly unit includes a bottom plate unit 1 and a steel box girder support unit 2 movably connected to the bottom plate unit 1;

[0054] The steel box beam support 2 is provided with a bottom support sealing plate 3, and a guide frame 4 is provided in the longitudinal direction of the end surface of the bottom support sealing plate 3, and the guide frame 4 can move in the transverse direction along the bottom support sealing plate 3;

[0055] A steel box girder assembly frame 5 is also provided on the bottom support cover plate 3. The steel box girder assembly frame 5 is movably provided on the bottom support cover plate 3. The steel box girder assembly frame 5 is symmetrically provided, and a limiting vertical plate 6 is provided on the outer side of the steel box girder assembly frame 5. A pushing cylinder 7 is provided outside the limiting vertical plate 6, and the output end of the pushing cylinder 7 is connected to the limiting vertical plate 6.

[0056] In use, the steel box girder assembly frame 5 is provided on both sides of the steel box girder for boosting, wherein the steel box girder assembly frame 5 can be provided in a concave frame structure or a flat plate structure.

[0057] The steel box girder assembly frame 5 can be moved to both sides by the push cylinder 7.

[0058] In order to better assemble the steel box beams in the use state and facilitate the welding and docking between the various steel box beam units, a steel box beam assembly area is provided on the bottom support cover plate 3, and the steel box beam assembly area is a concave structure on the bottom support cover plate 3. The steel box beam assembly frame 5 is located symmetrically on both sides of the steel box beam assembly area;

[0059] A movable support plate 8 is provided on the steel box girder assembly area, and the movable support plate 8 is matched with the steel box girder assembly area through a sliding groove / sliding block.

[0060] The structural setting of the movable support plate 8 can be used to carry out movable docking in the steel box girder assembly area.

[0061] In order to facilitate the movement and transfer of the steel box girder during use, the assembly platform A formed by a number of steel box girder assembly units can be moved on the concrete system platform B, and the bottom of the assembly platform A formed by a number of steel box girder assembly units is provided with symmetrical slide grooves 9, and the slide grooves 9 are inlaid and matched with the guide blocks 10 on the concrete system platform B.

[0062] When the above structure is used, the assembled steel box beam can be moved as a whole by moving the assembly platform A on the concrete system platform B.

[0063] In order to facilitate the positioning and fixing of the assembly platform A when in use, positioning supports 11 are provided on both sides of the concrete system platform B at positions corresponding to a number of steel box girder assembly units, and positioning pin holes matching with the positioning supports 11 are provided on both sides of each steel box girder assembly unit. The positioning support is a hydraulic cylinder, and a positioning pin rod matching with the positioning pin hole is provided at the output end of the hydraulic cylinder.

[0064] The positioning pin rod matched with the positioning pin hole is arranged at the output end of the positioning support to ensure the overall positioning when assembling the steel box girder.

[0065] In order to facilitate the adjustment of the height of the steel box girder by setting the guide frame in use, the two side columns of the guide frame 4 are set with a telescopic structure, and the two side columns of the guide frame 4 are provided with guide beams;

[0066] The guide beam 12 is provided with a guide unit 13 , and the guide unit 13 includes a fixed guide rod 131 and a movable guide rod 132 . The fixed guide rod 131 is located in the middle of the guide beam 12 , and the movable guide rod 132 is located on both sides of the fixed guide rod 131 and can move on the guide beam 12 .

[0067] The guide frame is provided with a fixed guide rod 131 and a movable guide rod 132. The fixed guide rod 131 is used to vertically fix the rib plate when assembling the steel box beam at the middle position.

[0068] The movable guide rods 132 are located on both sides of the fixed guide rods 131 to fix the rib plates of the assembled steel box beam on both sides of the steel box beam.

[0069] When manufacturing steel box girders, the structural setting of the movable support plate 8 can be moved and docked in the steel box girder assembly area, a base plate is laid flat on the movable support plate, and steel box girder ribs are laid horizontally / vertically on the base plate. The steel box girder ribs are fixed by movable guide rods 132 and fixed guide rods 131 to maintain the stability of laying.

[0070] As the laying progresses, the movable guide rod 132 and the fixed guide rod 131 are gradually lifted upward (removed and fixed).

[0071] Through slots 14 are provided on both sides of the guide beam 12, and movable guide rods 132 of the guide unit 13 are installed in the slots 14;

[0072] The movable guide rod 132 includes an auxiliary sleeve 133, the upper end surface of the auxiliary sleeve 133 is fixedly provided with a mounting platform, and a top extension cylinder 134 is fixedly provided on the mounting platform. The output end of the top extension cylinder 134 passes through the mounting platform and extends into the auxiliary sleeve 133. The auxiliary sleeve 133 extends downward through the through groove 14. The auxiliary sleeve 133 is provided with a threaded section, and the upper and lower end surfaces that contact the guide beam 12 are connected and fixed by bolts.

[0073] In order to facilitate fixing the rib plate of the steel box girder in use, a clamping frame 135 is provided in the auxiliary sleeve 133. The clamping frame 135 is a cylindrical structure, and a clamping groove 136 is provided on the cylindrical structure. The clamping groove 136 is clamped and connected with the splicing frame constituting the steel box girder;

[0074] The end of the clamping frame 136 is connected to the output end of the extension cylinder 134 fixedly arranged on the mounting platform.

[0075] In order to facilitate the increase of the hollow interior of the steel box beam support 2 in the use state, the partition support provided at intervals is in contact with the bottom support cover plate 3;

[0076] The steel box beam support 2 is in an inverted trapezoidal structure, and the steel box beam support 2 is fixedly connected to the bottom plate unit 1 . Specific embodiment 2

[0078] The application method of the steel box girder assembly device comprises the following steps:

[0079] An assembly platform formed by a plurality of steel box beam assembly units is arranged on a concrete system platform;

[0080] A symmetrical slide groove is arranged at the bottom of the assembly platform formed by a plurality of steel box beam assembly units, and the slide groove is inlaid and matched with the guide block on the concrete system platform, so that the assembly platform formed by the plurality of steel box beam assembly units can move on the concrete system platform;

[0081] Positioning supports are arranged on both sides of the concrete system platform at positions corresponding to a number of steel box beam assembly units, and positioning pin holes cooperating with the positioning supports are arranged on both sides of each steel box beam assembly unit. The positioning support is a hydraulic cylinder, and a positioning pin rod cooperating with the positioning pin hole is arranged at the output end of the hydraulic cylinder;

[0082] When in use, a positioning pin rod matched with a positioning pin hole is provided at the output end of the hydraulic cylinder to position and support a plurality of steel box girder assembly units;

[0083] When the assembled steel box beam needs to be transferred in the use state, the positioning pin rod is retracted from the positioning pin hole to both sides by the hydraulic cylinder, and the bottom of the assembly platform formed by the steel box beam assembly unit is provided with symmetrical sliding grooves, which can be inlaid with the guide blocks on the concrete system platform to slide;

[0084] A steel box girder assembly area is provided on the bottom support cover plate, the steel box girder assembly area is a concave structure on the bottom support cover plate, and the steel box girder assembly frame is located symmetrically on both sides of the steel box girder assembly area;

[0085] When the steel box girder is assembled, a movable support plate is arranged on the assembly area of ​​the steel box girder, and the movable support plate and the assembly area of ​​the steel box girder are matched through a slide groove / slider;

[0086] In the use state, the movable support plate and the steel box girder assembly area can be short-term moved for docking through the slide groove / slider. At the same time, in the positioning state, the connection position between the movable support plate and the steel box girder assembly area is positioned by pins;

[0087] When the steel box beam is assembled, a guide frame is arranged on each steel box beam assembly unit, and the guide frame is arranged along the longitudinal direction of the end surface of the bottom support cover plate;

[0088] The guide frame can move in the transverse direction along the bottom support sealing plate, and through grooves are provided on both sides of the guide beam, and movable guide rods of the guide unit are installed in the through grooves;

[0089] The movable guide rod comprises an auxiliary sleeve, a mounting platform is fixedly arranged on the upper end surface of the auxiliary sleeve, a top extension cylinder is fixedly arranged on the mounting platform, the output end of the top extension cylinder passes through the mounting platform and extends into the auxiliary sleeve, the auxiliary sleeve passes through the through slot and extends downward, and a threaded section is arranged on the auxiliary sleeve, and the upper and lower end surfaces that contact the guide beam are connected and fixed by bolts;

[0090] A clamping frame is arranged in the auxiliary sleeve, and the clamping frame is a cylindrical structure. A clamping groove is arranged on the cylindrical structure. The clamping groove is clamped and connected with the splicing frame constituting the steel box girder. The end position of the clamping frame is connected with the output end of the jacking cylinder fixedly arranged on the installation platform. Specific embodiment three

[0092] A steel box girder assembly device is used in the construction field; the steel box girder is assembled by the steel box girder assembly device, which has high flexibility and can be adjusted according to the steel box girder at any time, and is easy to assemble and disassemble and can be reused many times.

[0093] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0094] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel box girder assembly device, characterized in that: The invention comprises an assembly platform (A) formed by a plurality of steel box beam assembly units, wherein the assembly platform (A) formed by the plurality of steel box beam assembly units is arranged on a concrete system platform (B), and the steel box beam assembly units comprise a bottom plate unit (1) and a steel box beam support unit (2) movably connected to the bottom plate unit (1); The steel box beam support (2) is provided with a bottom support cover plate (3), and a guide frame (4) is provided in the longitudinal direction of the end surface of the bottom support cover plate (3), and the guide frame (4) can move in the transverse direction along the bottom support cover plate (3); A steel box girder assembly frame (5) is also provided on the bottom support cover plate (3). The steel box girder assembly frame (5) is movably provided on the bottom support cover plate (3). The steel box girder assembly frame (5) is symmetrically provided, and a limit plate (6) is provided on the outer side of the steel box girder assembly frame (5). A push cylinder (7) is provided outside the limit plate (6), and an output end of the push cylinder (7) is connected to the limit plate (6).

2. The steel box girder assembly device according to claim 1, characterized in that: The bottom support cover plate (3) is provided with a steel box girder assembly area, the steel box girder assembly area is a recessed structure on the bottom support cover plate (3), and the steel box girder assembly frame (5) is symmetrically located on both sides of the steel box girder assembly area; A movable support plate (8) is provided on the steel box girder assembly area, and the movable support plate (8) is matched with the steel box girder assembly area via a sliding groove / sliding block.

3. The steel box girder assembly device according to claim 2, characterized in that: An assembly platform (A) formed by a plurality of steel box beam assembly units can move on the concrete system platform (B); a symmetrical slide groove (9) is arranged at the bottom of the assembly platform (A) formed by a plurality of steel box beam assembly units; the slide groove (9) is inlaid and matched with a guide block (10) on the concrete system platform (B).

4. The steel box girder assembly device according to claim 3, characterized in that: Positioning supports (11) are arranged on both sides of the concrete system platform (B) at positions corresponding to a plurality of steel box girder assembly units, and positioning pin holes cooperating with the positioning supports (11) are arranged on both sides of each steel box girder assembly unit. The positioning support is a hydraulic cylinder, and a positioning pin rod cooperating with the positioning pin hole is arranged at the output end of the hydraulic cylinder.

5. The steel box girder assembly device according to claim 4, characterized in that: The columns on both sides of the guide frame (4) are arranged in a telescopic structure, and guide crossbeams are arranged on the columns on both sides of the guide frame (4); A guide unit (13) is provided on the guide beam (12), and the guide unit (13) comprises a fixed guide rod (131) and a movable guide rod (132), wherein the fixed guide rod (131) is located in the middle of the guide beam (12), and the movable guide rod (132) is located on both sides of the fixed guide rod (131) and can move on the guide beam (12).

6. The steel box girder assembly device according to claim 5, characterized in that: Through grooves (14) are provided on both sides of the guide crossbeam (12), and a movable guide rod (132) of the guide unit (13) is installed in the (14); The movable guide rod (132) comprises an auxiliary sleeve (133), the upper end surface of the auxiliary sleeve (133) is fixedly provided with a mounting platform, the mounting platform is fixedly provided with a top extension cylinder (134), the output end of the top extension cylinder (134) passes through the mounting platform and extends into the auxiliary sleeve (133), the auxiliary sleeve (133) passes through the through slot (14) and extends downward, and the auxiliary sleeve (133) is provided with a threaded section, and the upper and lower end surfaces that contact the guide beam (12) are connected and fixed by bolts.

7. The steel box girder assembly device according to claim 6, characterized in that: A clamping frame (135) is arranged inside the auxiliary sleeve (133), and the (135) is a cylindrical structure, and a clamping groove (136) is arranged on the cylindrical structure, and the clamping groove (136) is clamped and connected with the splicing frame constituting the steel box beam; The end position of the clamping frame (136) is connected to the output end of the extension cylinder (134) fixedly arranged on the installation platform.

8. The steel box girder assembly device according to claim 7, characterized in that: The steel box beam support (2) is hollow inside, and the partition support provided at intervals is in contact with the bottom support cover plate (3); The steel box beam support (2) is in an inverted trapezoidal structure, and the steel box beam support (2) is fixedly connected to the bottom plate unit (1).

9. The application method of the steel box girder assembly device according to any one of claims 1 to 8, characterized in that: The steps include: An assembly platform formed by a plurality of steel box beam assembly units is arranged on a concrete system platform; A symmetrical slide groove is arranged at the bottom of the assembly platform formed by a plurality of steel box beam assembly units, and the slide groove is inlaid and matched with the guide block on the concrete system platform, so that the assembly platform formed by the plurality of steel box beam assembly units can move on the concrete system platform; Positioning supports are arranged on both sides of the concrete system platform at positions corresponding to a number of steel box beam assembly units, and positioning pin holes cooperating with the positioning supports are arranged on both sides of each steel box beam assembly unit. The positioning support is a hydraulic cylinder, and a positioning pin rod cooperating with the positioning pin hole is arranged at the output end of the hydraulic cylinder; When in use, a plurality of steel box girder assembly units are positioned and supported by a positioning pin rod matched with a positioning pin hole provided at the output end of the hydraulic cylinder; When the assembled steel box beam needs to be transferred in the use state, the positioning pin rod is retracted from the positioning pin hole to both sides by the hydraulic cylinder, and the bottom of the assembly platform formed by the steel box beam assembly unit is provided with symmetrical sliding grooves, which can be inlaid with the guide blocks on the concrete system platform to slide; A steel box girder assembly area is provided on the bottom support cover plate, the steel box girder assembly area is a concave structure on the bottom support cover plate, and the steel box girder assembly frame is located symmetrically on both sides of the steel box girder assembly area; When assembling the steel box girder, a movable support plate is arranged on the assembly area of ​​the steel box girder, and the movable support plate and the assembly area of ​​the steel box girder are matched through a slide groove / slider; In the use state, the movable support plate and the steel box girder assembly area can be short-term moved for docking through the slide groove / slider. At the same time, in the positioning state, the connection position between the movable support plate and the steel box girder assembly area is positioned by pins; When the steel box beam is assembled, a guide frame is arranged on each steel box beam assembly unit, and the guide frame is arranged along the longitudinal direction of the end surface of the bottom support cover plate; The guide frame can move in the transverse direction along the bottom support sealing plate, and through grooves are provided on both sides of the guide beam, and movable guide rods of the guide unit are installed in the through grooves; The movable guide rod comprises an auxiliary sleeve, a mounting platform is fixedly arranged on the upper end surface of the auxiliary sleeve, a top extension cylinder is fixedly arranged on the mounting platform, the output end of the top extension cylinder passes through the mounting platform and extends into the auxiliary sleeve, the auxiliary sleeve passes through the through slot and extends downward, and a threaded section is arranged on the auxiliary sleeve, and the upper and lower end surfaces that contact the guide beam are connected and fixed by bolts; A clamping frame is arranged in the auxiliary sleeve, and the clamping frame is a cylindrical structure. A clamping groove is arranged on the cylindrical structure. The clamping groove is clamped and connected with the splicing frame constituting the steel box girder. The end position of the clamping frame is connected with the output end of the jacking cylinder fixedly arranged on the installation platform.

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