Adjustable supporting device suitable for bridge girder erection machine

Abstract

The utility model relates to the technical field of bridge construction, in particular to an adjustable supporting device suitable for a bridge girder erection machine, which comprises a bridge pier, two supporting legs, a cross beam, a suspension mechanism and a hoop mechanism, each supporting leg comprises an upper stand column, a middle stand column, a lower stand column, a plurality of bolts and a plurality of nuts, the cross beams comprise the upper cross beam and the lower cross beam, and flanges are fixedly connected to the bottom of each upper stand column, the two ends of each middle stand column, the two ends of each lower stand column and the top of each lower cross beam. Due to the design of the ultrahigh supporting leg with large flexibility and large bearing capacity, the height of the supporting leg can be adjusted according to actual conditions, the supporting leg can meet the construction requirements of uphill, downhill and undulating grounds, the overturning structure is simple, assembly and maintenance are easy, and the problems of safety, moving flexibility and the like of the device in bridge construction can be effectively solved. And the construction efficiency can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to an adjustable supporting device suitable for a bridge erecting machine. Background Art

[0002] In bridge construction, a telescopic support device with adjustable outriggers is needed to help the bridge erection machine to transport the beams to the bridge deck when the segment beams have not yet been closed after the span has passed. However, the common outrigger devices currently used are inefficient, inconvenient to operate, and have certain safety hazards. Although some use electric lifting, the device cannot achieve free movement and has low turnover efficiency, resulting in increased construction costs. Utility Model Content

[0003] In order to effectively solve the problems of the safety and mobility of the bridge erecting machine in bridge construction and improve the construction efficiency, the utility model provides an adjustable supporting device suitable for the bridge erecting machine.

[0004] The utility model provides an adjustable support device suitable for a bridge erecting machine, which adopts the following technical solution:

[0005] The adjustable support device for a bridge erecting machine comprises a pier, two legs, a crossbeam, a suspension mechanism and a hoop mechanism, each of the legs comprises an upper column, a middle column, a lower column, a plurality of bolts and a plurality of nuts, the crossbeam comprises an upper crossbeam and a lower crossbeam, the bottom of each upper column, the two ends of the middle column, the two ends of the lower column and the top of the lower crossbeam are fixedly connected with flanges, the upper column, the middle column and the lower column of each leg are linearly arranged from top to bottom, and every two corresponding flanges are connected by corresponding bolts and nuts; the interior of the hoop mechanism is clamped on the outer surface of the pier, and the bottom of the lower crossbeam is fixedly connected to the top of the hoop mechanism; the interior of the upper crossbeam is fixedly connected to the outer surfaces of the two columns, one side of the upper crossbeam is rotatably connected to two hinge seats, and the bottom of each hinge seat is fixedly connected to the top of the suspension mechanism; one side of the upper crossbeam is slidably connected to one side of the upper column.

[0006] By adopting the above technical solution, the height of the outriggers can be changed through the combination of the upper columns, the middle columns, the lower columns and the lower cross beam, which makes it convenient for the outriggers to adapt to different bridge construction heights. The combined outriggers have low maintenance costs, high cost performance, and are easy to reuse.

[0007] Preferably, each of the hinge seats includes an upper hinge seat, a lower hinge seat, a longitudinal hinge pin and a horizontal rotation pin. Each of the upper hinge seats is connected to the lower hinge seat through a corresponding longitudinal hinge pin and a corresponding bolt, and each of the lower hinge seats is connected to the upper crossbeam through a corresponding horizontal rotation pin and a corresponding bolt.

[0008] By adopting the above technical solution, the support legs can be constructed in accordance with the curved path of the bridge through the hinge seat, and slight rotation in the horizontal direction can be achieved to adapt to the oblique working condition.

[0009] Preferably, the bottom of each upper column and the top of the corresponding middle column, the bottom of each middle column and the top of the corresponding lower column are fixedly connected with a flip pin, and the outer surface of the lower cross beam, one side of each middle column and one side of each lower column are fixedly connected with a lifting ear; the corresponding lifting ear is located at the bottom of each middle column and the bottom of each lower column, the suspension mechanism includes two electric chain hoists and two steel ropes, the bottom of each lower hinge seat is fixedly connected to the top of the corresponding electric chain hoist, one end of the two steel ropes is fixedly connected to the inside of the corresponding electric chain hoist hook, and the other end of the two steel ropes is fixedly connected to the inside of the corresponding lifting ear.

[0010] By adopting the above technical scheme, a flip pin is provided at the connection between the upper column, the middle column and the lower column. When it is necessary to cross the erected cap beam or to erect the last span, the electric guide chain and wire rope of the electric chain hoist can be used to flip the middle column or the lower column upward to achieve the adjustment of the larger leg height; the suspension mechanism can lift the lifting lug of the middle column or the lifting lug of the lower column or the lifting lug of the lower cross beam according to the actual construction situation, so that the bridge erection machine can pass through piers of different heights.

[0011] Preferably, the clamp mechanism comprises a clamp 1, a clamp 2 and six pads, both ends of the clamp 1 are connected to the two ends of the clamp 2 by corresponding bolts and nuts, and the pier is located between the clamp 1 and the clamp 2; the top of the clamp 2 is fixedly connected to the bottom of the lower cross beam, and the bottom of the clamp 2 is fixedly connected with a right-angled trapezoidal piece, and the side of the right-angled trapezoidal piece close to the pier is fixedly connected to one side of one of the pads, and the lower cross beam, the clamp 2 and the right-angled trapezoidal piece are arranged linearly from top to bottom; one side of three of the pads are fixedly connected to the inside of the clamp 1, one side of two of the pads are fixedly connected to the inside of the clamp 2, and the outer surface of the pier is clamped to one side of the five pads.

[0012] By adopting the above technical solution, the lower cross beam, the second clamp and the right-angle trapezoidal member are located in a straight line. When the first and second clamps are just screwed or are about to be loosened, and five of the pads have not clamped the bridge pier, the other pad installed on one side of the right-angle trapezoidal member can clamp the bridge pier under the pressure of the lower cross beam, thereby preventing the first and second clamps from sliding directly off the bridge pier.

[0013] Preferably, two lifting cylinders are fixedly connected to one side of the upper cross beam, and the end of the output shaft of each lifting cylinder is fixedly connected to one side of the corresponding upper column.

[0014] By adopting the above technical solution, the two upper columns pass through the window inside the upper crossbeam, and the distance from the upper crossbeam to the bottom end of the upper columns can be adjusted by extending and retracting the jacking cylinder, that is, the height of the outriggers can be adjusted by extending and retracting the jacking cylinder.

[0015] Preferably, one side of the two middle columns is fixedly connected with a cross brace, and the interior of the cross brace is fixedly connected with two diagonal braces.

[0016] By adopting the above technical solution, the cross brace is a lateral connection of the two middle columns to enhance the lateral stability of the outriggers. The diagonal brace is located inside the cross brace to divide the cross brace into multiple triangular areas. The triangles have strong stability and can enhance the lateral stability of the outriggers.

[0017] In summary, the utility model has the following beneficial technical effects:

[0018] 1. The device is provided with upper columns, middle columns and lower columns that can be assembled and flipped. According to the height of the bridge pier, the appropriate upper columns, middle columns, lower columns and lower beams can be selected for assembly. The bridge erection machine has a design of ultra-high outriggers with large scalability and load-bearing capacity, so that the outriggers can be adjusted in height according to actual conditions, so as to meet the construction requirements of uphill, downhill and undulating ground. The flipping structure is simple and easy to assemble and maintain. The outriggers have strong safety, flexible movement and convenient operation, which can effectively solve the safety and mobility of the device in bridge construction and significantly improve the construction efficiency.

[0019] 2. This device is fixedly connected with a horizontal swivel pin, which is beneficial to the main beam structure of the bridge erecting machine when the bridge erecting machine moves longitudinally through the hole. The device has a self-balancing function, which can ensure the stability of the whole machine when the bridge erecting machine moves longitudinally through the hole. When there is a curve in the bridge to be built, the bridge erecting machine needs to turn flexibly and be erected in coordination with the curved path of the bridge. The bolts between the lower hinge seat and the upper beam are loosened, and the bridge erecting machine can be slightly rotated in the horizontal direction through the horizontal swivel pin to facilitate adaptation to the oblique working condition. The device has low maintenance cost and high cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an adjustable support device suitable for a bridge erecting machine in the utility model;

[0021] Figure 2 It is a schematic structural diagram of a side view of an adjustable support device suitable for a bridge erecting machine of the utility model;

[0022] Figure 3 yes Figure 1 A is an enlarged schematic diagram of the local structure at center A;

[0023] Figure 4 yes Figure 1 A magnified schematic diagram of the local structure at B in the middle;

[0024] Figure 5 It is a schematic diagram of the structure of the adjustable support device for a bridge erecting machine in which the legs are turned over in a complete state;

[0025] Figure 6 It is a schematic structural diagram of an adjustable support device for a bridge erecting machine of the utility model, which is turned over after the lower column is removed;

[0026] Figure 7 It is a structural schematic diagram of a clamp mechanism in an adjustable supporting device suitable for a bridge erecting machine of the utility model;

[0027] Figure 8 The utility model is a structural schematic diagram of an upper cross beam sliding on an upper column in an adjustable supporting device suitable for a bridge erecting machine.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. Upper column; 2. Middle column; 3. Lower column; 4. Upper crossbeam; 5. Lower crossbeam; 6. Flange; 7. Hinge seat; 71. Upper hinge seat; 72. Lower hinge seat; 73. Articulated pin in the longitudinal direction of the bridge; 74. Horizontal swivel pin; 8. Lifting ear; 9. Flip pin; 10. Electric chain hoist; 11. Clamp one; 12. Clamp two; 13. Pad; 14. Cross brace; 15. Lifting cylinder. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-8 The utility model is described in further detail.

[0030] The utility model embodiment discloses an adjustable supporting device suitable for a bridge erecting machine.

[0031] Reference Figure 1, including piers, two legs, a crossbeam, a suspension mechanism and a hoop mechanism. The legs are located at the front end of the main beam of the bridge erection machine. To fix the legs, a flange plate fixedly connected to the outer surface of the upper hinge seat 71 is bolted to the lower cover plate of the upper chord of the main beam, so that the legs are connected to the main beam of the bridge erection machine. The other legs of the bridge erection machine support the middle column 2 and the lower column 3 to complete the flipping. The hoop mechanism is used to bear the supporting load. There are as many hoop mechanisms as there are piers. A ladder platform is also provided on one side of the two legs for installing and removing various pins and bolts. It is also suitable for personnel construction channels during the installation of the cap beam. Each leg is located between the corresponding two piers. Each leg includes an upper column 1, a middle column 2, and a lower column 3. Several bolts and several nuts. The heights of the upper column 1, the middle column 2, and the lower column 3 are 10.86 meters, 7.19 meters, and 4 meters, respectively. According to the upslope, downslope, undulating ground, and the height of the bridge pier, select the upper column 1, the middle column 2, the lower column 3, and the lower beam 5 to assemble the legs, or the upper column 1, the middle column 2, and the lower beam 5 to assemble the legs, or the upper column 1 and the lower beam 5 to assemble the legs, and cooperate with the bridge erection machine to complete the bridge construction. The beam includes an upper beam 4 and a lower beam 5. The bottom of each upper column 1, the two ends of the middle column 2, the two ends of the lower column 3, and the top of the lower beam 5 are fixedly connected with a flange 6. The upper column 1, the middle column 2, and the lower beam 5 of each leg are fixedly connected with a flange 6. The columns 2 and the lower columns 3 are arranged linearly from top to bottom, and every two corresponding flanges 6 are connected by corresponding bolts and nuts. When the construction is carried out on uphill, downhill and undulating ground, the height of the pier may be different. The bridge erection machine needs to match the corresponding construction conditions and select the legs of appropriate height for construction. When the height of the pier is 4m<h≤11m, the upper column 1, the middle column 2, the lower column 3 and the lower beam 5 are assembled, and the adjustment range of the upper beam 4 is 12.32 meters-20.32 meters. When the height of the pier is 0m<h≤7m, the upper column 1, the middle column 2 and the lower beam 5 are assembled, and the adjustment range of the upper beam 4 is 8.3 meters-16.3 meters; when the legs of the bridge erection machine are used for bridge When the platform is in position, assemble the upper column 1 and the lower beam 5, and the adjustment range of the upper beam 4 is 13.83 meters-9.2 meters; the inner part of the clamp mechanism is clamped on the outer surface of the pier, and the bottom of the lower beam 5 is fixedly connected to the top of the clamp mechanism; the inner part of the upper beam 4 is fixedly connected to the outer surfaces of the two columns, and one side of the upper beam 4 is rotatably connected to two hinge seats 7, and the bottom of each hinge seat 7 is fixedly connected to the top of the suspension mechanism; one side of the upper beam 4 is slidably connected to one side of the upper column 1, and the upper beam 4 can drive the electric chain hoist 10 to change the height in the vertical direction, so that the bridge construction materials driven by the electric chain hoist 10 change in height and are built at the specified height to complete the bridge construction.

[0032] Reference Figure 1 , 2, 3, 4, each hinge seat 7 includes an upper hinge seat 71, a lower hinge seat 72, a bridge-direction hinge pin 73 and a horizontal rotation pin 74, each upper hinge seat 71 is connected to the lower hinge seat 72 by a corresponding bridge-direction hinge pin 73 and a corresponding bolt, a bridge-direction hinge pin 73 is arranged between the upper hinge seat 71 and the lower hinge seat 72 to strengthen the connection, each lower hinge seat 72 is connected to the upper crossbeam 4 by a corresponding horizontal rotation pin 74 and a corresponding bolt. When there is a curve in the bridge to be built, the bridge-building machine needs to be flexibly turned to cooperate with the turning curve of the bridge for erection. By loosening the bolts between the lower hinge seat 72 and the upper crossbeam 4, the bridge-building machine can be slightly rotated in the horizontal direction through the horizontal rotation pin 74 to adapt to the oblique working condition.

[0033] Reference Figure 2 , 5 6. The bottom of each upper column 1 and the top of the corresponding middle column 2, as well as the bottom of each middle column 2 and the top of the corresponding lower column 3 are fixedly connected with a flip pin 9. By flipping the flip pin 9, the upper column 1 and the middle column 2, as well as the middle column 2 and the lower column 3 can be flipped. When it is necessary to move the legs of the bridge erection machine over the piers, the middle column 2 or the lower column 3 can be flipped, so that the height of the bottom end of the upper column 1 and the height of the bottom end of the lower cross beam 5 are both higher than the height of the piers.

[0034] Reference Figure 5 , 6 The outer surface of the lower crossbeam 5, one side of each middle column 2 and one side of each lower column 3 are fixedly connected with lifting ears 8; the corresponding lifting ears 8 are located at the bottom of each middle column 2 and the bottom of each lower column 3, and the lifting ears 8 are close to the bottom of the middle column 2 and the lower column 3, but there is still a distance from the bottom end of the middle column 2 and the lower column 3, which is convenient for the electric chain hoist 10 to lift the middle column 2 and the lower column 3 to the maximum extent.

[0035] Reference Figure 5 , 6The suspension mechanism includes two electric chain hoists 10 and two steel wire ropes. The electric chain hoist 10 can suspend bridge construction materials through steel wire ropes or other objects, drive the beam construction materials to fall to the designated position, and build a bridge. The bottom of each lower hinge seat 72 is fixedly connected to the top of the corresponding electric chain hoist 10, one end of the two steel wire ropes is fixedly connected to the inside of the corresponding electric chain hoist 10 hook, and the other end of the two steel wire ropes is fixedly connected to the inside of the corresponding lifting ear 8. The electric chain hoist 10 can be connected to the lifting ear 8 of the middle column 2, the lifting ear 8 of the lower column 3 or the lifting ear 8 of the lower beam 5 through the steel wire rope, and then the middle column 2, the lower column 3 or the lower beam 5 is lifted. When the bridge erection machine needs to change position, the clamp 1 11 and the clamp 2 12 have been disassembled. When the two legs need to pass through the piers or between the piers, the steel wire rope on the electric chain hoist 10 can be tied to the lifting lug 8 of the middle column 2 or the lower column 3 according to the height of the piers, and the bolts on the corresponding flanges can be removed. The electric chain hoist 10 drives the middle column 2 or the lower column 3 to flip through the flip pin 9, so that the angle between the lifted middle column 2 or the lower column 3 and the upper column 1 is 90°; or the clamp mechanism can be removed so that the clamp 1 11 and the clamp 2 12 are no longer surrounded on the outer surface of the pier, and the steel wire rope on the electric chain hoist 10 is tied to the lifting lug 8 of the lower beam 5. The electric chain hoist 10 pulls the steel wire rope to lift the lower beam 5, so that the legs of the bridge erection machine can drive the two legs to pass between the corresponding piers while lifting the lower beam 5.

[0036] Reference Figure 2 , 7The clamp mechanism includes a clamp 11, a clamp 2 12 and six pads 13. Both ends of the clamp 11 are connected to the two ends of the clamp 2 12 by corresponding bolts and nuts. The clamp 1 11 and the clamp 2 12 are connected by bolts and nuts and surround the outer surface of the pier. When the bolts and nuts lock the clamp 1 11 and the clamp 2 12, the five pads 13 are just clamped on the outer surface of the pier, and the pier is located between the clamp 1 1 and the clamp 2 12; the top of the clamp 2 12 is fixedly connected to the bottom of the lower cross beam 5, and the bottom of the clamp 2 12 is fixedly connected with a right-angled trapezoidal piece, and the side of the right-angled trapezoidal piece close to the pier is fixedly connected to one side of one of the pads 13, and the lower cross beam 5, the clamp 2 12 and the right-angled trapezoidal piece are arranged linearly from top to bottom; one of the three pads 13 The two sides are fixedly connected to the inside of the clamp 11, one side of the two pads 13 is fixedly connected to the inside of the clamp 2 12, the outer surface of the pier is clamped to one side of the five pads 13, the lower cross beam 5, the clamp 2 12 and the right-angle trapezoidal member are located in a straight line, when the clamp 1 11 and the clamp 2 12 are just screwed or are about to be loosened, and five of the pads 13 have not clamped the pier, the other pad 13 installed on one side of the right-angle trapezoidal member can clamp the pier under the pressure of the lower cross beam to prevent the clamp 1 11 and the clamp 2 12 from sliding directly off the pier, when five of the pads 13 that are tightly attached to the pier slide against the pier, the sixth pad 13 that is not tightly attached to the pier can instantly stick to the outer surface of the pier to support the lower cross beam 5 to continue to be connected to the pier.

[0037] Reference Figure 1 , 8 Two lifting cylinders 15 are fixedly connected to one side of the upper cross beam 4, and the end of the output shaft of each lifting cylinder 15 is fixedly connected to one side of the corresponding upper column 1. The two upper columns 1 pass through the window inside the upper cross beam 4. The distance from the upper cross beam 4 to the bottom end of the upper column 1 can be adjusted by the extension and retraction of the lifting cylinders 15, that is, the height of the outriggers can be adjusted within a small range within the height of the upper column 1 by the extension and retraction of the lifting cylinders 15.

[0038] Reference Figure 1 A cross brace 14 is fixedly connected to one side of the two middle columns 2, and two diagonal braces are fixedly connected inside the cross brace 14. The cross brace 14 connects the two middle columns 2, and then connects the two legs. The cross brace 14 is a transverse connection of the two middle columns 2, which is used to enhance the lateral stability of the legs. The diagonal brace is located inside the cross brace 14, dividing the cross brace 14 into multiple triangular areas. The triangles have strong stability and can enhance the lateral stability of the legs.

[0039] The implementation principle of an adjustable support device suitable for a bridge erecting machine in the embodiment of the utility model is as follows:

[0040] 1. According to the upslope, downslope, undulating ground and the height of the bridge pier, select the upper column 1, the middle column 2, the lower column 3 and the lower beam 5 to assemble the outriggers, or the upper column 1, the middle column 2 and the lower beam 5 to assemble the outriggers, or the upper column 1 and the lower beam 5 to assemble the outriggers, and cooperate with the bridge erection machine to complete the bridge construction;

[0041] 2. The electric chain hoist 10 can be connected to the lifting lug 8 of the middle column 2, the lifting lug 8 of the lower column 3 or the lifting lug 8 of the lower beam 5 through the wire rope, and then the middle column 2, the lower column 3 or the lower beam 5 can be lifted. When the bridge erection machine needs to change position and the two legs need to pass through the piers or between the piers, the clamp 1 11 and the clamp 2 12 must be disassembled first. According to the height of the piers, when the height of the piers does not exceed 11 meters, the upper column 1, the middle column 2 and the lower column 3 can be assembled together first, and then the wire rope on the electric chain hoist 10 can be tied to the lifting lug 8 of the lower column 3, and the bolts on the flange 6 between the middle column 2 and the upper column 1 can be removed. The electric chain hoist 10 drives the middle column 2 and the lower column 3 to flip through the flip pin 9, so that the lifted middle column 2 and the lower column 3 The angle between the upper column 1 and the middle column 2 is 90°; when the height of the pier does not exceed 7 meters, first assemble the upper column 1 and the middle column 2 together, then tie the wire rope on the electric chain hoist 10 to the lifting lug 8 of the middle column 2, and then remove the bolts on the flange 6 between the corresponding middle column 2 and the upper column 1. The electric chain hoist 10 drives the middle column 2 to flip through the flip pin 9, so that the angle between the lifted middle column 2 and the middle column 1 is 90°; or remove the clamp mechanism so that the clamp 1 11 and the clamp 2 12 are no longer surrounded on the outer surface of the pier, and tie the wire rope on the electric chain hoist 10 to the lifting lug 8 of the lower beam 5. The electric chain hoist 10 pulls the wire rope to lift the lower beam 5, so that the legs of the bridge erection machine can drive the two legs to pass between the corresponding piers while lifting the lower beam 5.

[0042] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An adjustable support device suitable for a bridge erecting machine, characterized in that: The bridge comprises a pier, two legs, a crossbeam, a suspension mechanism and a clamp mechanism, each of the legs comprising an upper column (1), a middle column (2), a lower column (3), a plurality of bolts and a plurality of nuts, the crossbeam comprising an upper crossbeam (4) and a lower crossbeam (5), the bottom of each upper column (1), the two ends of the middle column (2), the two ends of the lower column (3) and the top of the lower crossbeam (5) are fixedly connected with a flange (6), the upper column (1), the middle column (2) and the lower column (3) of each leg are linearly arranged from top to bottom, and every two corresponding flanges (6) are connected by corresponding bolts and nuts; The interior of the clamp mechanism is clamped to the outer surface of the bridge pier, and the bottom of the lower cross beam (5) is fixedly connected to the top of the clamp mechanism; The interior of the upper cross beam (4) is fixedly connected to the outer surfaces of the two columns, one side of the upper cross beam (4) is rotatably connected to two hinge seats (7), and the bottom of each hinge seat (7) is fixedly connected to the top of the suspension mechanism; One side of the upper cross beam (4) is slidably connected to one side of the upper column (1).

2. The adjustable support device for a bridge erecting machine according to claim 1, characterized in that: Each hinge seat (7) comprises an upper hinge seat (71), a lower hinge seat (72), a hinge pin shaft (73) in the longitudinal direction and a horizontal rotation pin shaft (74); each upper hinge seat (71) is connected to the lower hinge seat (72) via a corresponding hinge pin shaft (73) in the longitudinal direction and a corresponding bolt; each lower hinge seat (72) is connected to the upper crossbeam (4) via a corresponding horizontal rotation pin shaft (74) and a corresponding bolt.

3. The adjustable support device for a bridge erecting machine according to claim 2, characterized in that: The bottom of each upper column (1) and the top of the corresponding middle column (2), as well as the bottom of each middle column (2) and the top of the corresponding lower column (3) are fixedly connected with a flip pin (9).

4. The adjustable support device for a bridge erecting machine according to claim 3, characterized in that: The outer surface of the lower cross beam (5), one side of each middle column (2) and one side of each lower column (3) are all fixedly connected with lifting ears (8); The corresponding lifting lugs (8) are located at the bottom of each middle column (2) and the bottom of each lower column (3).

5. The adjustable support device for a bridge erecting machine according to claim 4, characterized in that: The suspension mechanism comprises two electric chain hoists (10) and two steel wire ropes, the bottom of each lower hinge seat (72) is fixedly connected to the top of the corresponding electric chain hoist (10), one end of the two steel wire ropes is fixedly connected to the inside of the corresponding electric chain hoist (10) hook, and the other end of the two steel wire ropes is fixedly connected to the inside of the corresponding lifting ear (8).

6. The adjustable support device for a bridge erecting machine according to claim 5, characterized in that: The clamp mechanism comprises a clamp first (11), a clamp second (12) and six pads (13), the two ends of the clamp first (11) are connected to the two ends of the clamp second (12) by corresponding bolts and nuts, and the bridge pier is located between the clamp first (11) and the clamp second (12); The top of the second clamp (12) is fixedly connected to the bottom of the lower cross beam (5), the bottom of the second clamp (12) is fixedly connected to a right-angled trapezoidal piece, the side of the right-angled trapezoidal piece close to the bridge pier is fixedly connected to one side of one of the pads (13), and the lower cross beam (5), the second clamp (12) and the right-angled trapezoidal piece are arranged linearly from top to bottom; One side of three of the pads (13) is fixedly connected to the inside of the first clamp (11), one side of two of the pads (13) is fixedly connected to the inside of the second clamp (12), and the outer surface of the pier is clamped to one side of the five pads (13).

7. The adjustable support device for a bridge erecting machine according to claim 6, characterized in that: Two lifting cylinders (15) are fixedly connected to one side of the upper crossbeam (4), and the end of the output shaft of each lifting cylinder (15) is fixedly connected to one side of the corresponding upper column (1).

8. The adjustable support device for a bridge erecting machine according to claim 7, characterized in that: A transverse brace (14) is fixedly connected to one side of the two middle upright columns (2), and two diagonal braces are fixedly connected inside the transverse brace (14).

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