A suspension device for cast-in-situ bridge deck with steel-concrete composite beams

Abstract

The present invention belongs to the field of suspension technology, and in particular to a suspension device for cast-in-situ bridge decks of steel-concrete composite beams. Currently, in the process of suspending such circular tubes, it is necessary to tie them up with ropes before lifting them. Since this lifting method is less safe and improper operation can easily cause damage to personnel or the tube body, the following solution is proposed, including a platform, and two symmetrical slide grooves are provided on the upper outer wall of the platform. The present invention utilizes a clamping assembly to achieve clamping and fixing operations on circular tube bodies of different specifications, facilitating subsequent lifting and hoisting. The device has a simple structure and utilizes a clamping assembly to replace traditional rope fixation, thereby improving the fixing effect of the circular tube and avoiding the problem of falling off during the lifting process.

Description

Technical Field

[0001] The present invention relates to the technical field of suspension, and in particular to a suspension device for a cast-in-situ bridge deck of a steel-concrete composite beam. Background Art

[0002] With the continuous development of bridge engineering in the construction field, steel-concrete composite beams, as a structural form of bridges, are becoming more and more widely used in complex construction environments (such as crossing existing roads, small rivers, etc.). However, precisely because steel-concrete composite beams are mostly used in complex construction environments, the construction of their bridge decks has always been a major difficulty. In most cases, the conditions for erecting scaffolding required for traditional bridge superstructure construction are not available. For example, the clearance under the bridge does not meet the conditions for erecting scaffolding when pouring the bridge deck; or it is located above the river and cannot be erected; and when crossing an existing road, it is necessary to ensure the normal passage of the existing road, and closed construction is not possible, etc. Therefore, the hanging formwork method can be used to construct the cast-in-place bridge deck of steel-concrete composite beams.

[0003] Hoisting refers to the general term for the installation and positioning of equipment by cranes or lifting mechanisms. During the inspection or maintenance process, various lifting machines are used to lift equipment, workpieces, tools, materials, etc. to change their position.

[0004] Hanging formwork support system

[0005] Support Setup: A set of support points is installed at the top of each steel beam's steel plate, aligned with the web stiffeners. The spacing is determined by the web stiffener locations (no more than 3m). Each support point uses two φ32 steel rods as a vertical load transfer system. A 36 channel steel is installed longitudinally on top of the steel rods to support the beam. PVC pipes are placed on the outside of the steel rods for isolation and ease of removal.

[0006] Crossbeam setting: The crossbeam is made of double-jointed 25 channel steel, corresponding to each set of support points, with a spacing of no more than 3m.

[0007] Tie rod setting: φ16 fine-rolled threaded steel is used, and 2 hanging points are set between each steel beam in the cross bridge direction, and the longitudinal spacing corresponds to the cross beam.

[0008] Bottom formwork system setting: The bottom formwork crossbeam adopts double-pieced 25 channel steel connected to the supporting crossbeam through tie rods, the longitudinal beam adopts I-beam, and 10*10 square wood is used to form a distribution beam above the longitudinal beam.

[0009] (2) Installation process of the hanging formwork support system: setting of supporting steel bars → setting of crossbeams → setting of tie rods → installation of bottom formwork crossbeams → installation of bottom formwork longitudinal beams → laying of square timbers → installation of bottom formwork → inspection and adjustment of the hanging formwork system.

[0010] In panel installation, large circular tubes such as beams and supporting steel bars are used for suspension. Currently, such circular tubes need to be tied with ropes and then hoisted. However, this hoisting method is less safe and improper operation can easily cause damage to personnel or the tube itself. Summary of the Invention

[0011] The present invention proposes a steel-concrete composite beam cast-in-place bridge deck suspension device, which includes a platform, two symmetrical slide grooves are provided on the upper outer wall of the platform, electric slide rails are provided inside the slide grooves, and the inner walls of the two slide grooves are movably connected with a plurality of symmetrical lifting brackets, the upper outer wall of the platform is fixedly connected with a plurality of equidistant turntables, the turntable is located between the two lifting brackets, and the lifting brackets are provided with slide grooves, the inner walls of the slide grooves are movably connected with lifting seats, a top plate is fixedly connected between the two symmetrical lifting brackets, two symmetrical slide grooves are provided on the lower outer wall of the top plate, and the inner walls of the slide grooves are movably connected with inner slide seats, a clamping assembly is provided under the two inner slide seats, and the same circular tube body is provided on the two clamping assemblies.

[0012] Preferably, the clamping assembly includes a lower pressure block, a connecting block, a left arc clamp and a right arc clamp. The outer walls on both sides of the lower pressure block are fixedly connected with bending arc pressure plates. The bottom ends of the two bending arc pressure plates are provided with grooves. Auxiliary rollers are movably connected between the inner walls on both sides of the grooves. The connecting block is located below the lower pressure block. Two symmetrical grooves are provided on the connecting block. Short rods are fixedly connected between the inner walls on both sides of the two grooves. The left arc clamp and the right arc clamp are movably connected to the outer walls of the two short rods respectively.

[0013] Preferably, the lower outer wall of the inner slide is fixedly connected to the bottom block, a circular hole groove is provided on the bottom block, the inner wall of the circular hole groove is fixedly connected to the first hydraulic rod, the other end of the first hydraulic rod is fixedly connected to the upper outer wall of the lower pressure block, and two symmetrical circular holes are provided on the lower pressure block, the two circular holes are respectively located on both sides of the first hydraulic rod, the inner walls of the two circular holes are movably connected to the limiting slide rod, and the two ends of the two limiting slide rods are respectively fixedly connected to the lower outer wall of the bottom block and the upper outer wall of the connecting block.

[0014] Preferably, two symmetrical bidirectional connecting columns are provided between the two L-shaped connecting blocks, and the outer walls on both sides of the bidirectional connecting columns are fixedly connected with a reset spring, and the other end of the reset spring is fixedly connected to the outer wall of the left arc clamp or the right arc clamp on the same side.

[0015] Preferably, the lower outer wall of the connecting block is fixedly connected to two symmetrical L-shaped connecting blocks, and the L-shaped connecting blocks, the left arc clamp and the right arc clamp are all provided with a holding assembly.

[0016] Preferably, the pressing assembly includes a central axis plate, a left pressing plate and a right pressing plate, and the central axis plate is fixedly connected to the L-shaped connecting block, the left arc clamp and the right arc clamp.

[0017] Preferably, two symmetrical grooves are provided on the central axis plate, and a rotating rod is fixedly connected between the inner walls on both sides of the groove. The outer wall of the rotating rod is movably connected to the left pressure plate or the right pressure plate respectively, and an arc groove is provided on the left pressure plate and the right pressure plate. The inner walls of the arc groove are fixedly connected with a rubber layer, and a plurality of symmetrically distributed deflection springs are fixedly connected between the left pressure plate and the right pressure plate.

[0018] Preferably, circular grooves are provided on multiple lifting brackets, and the inner walls of the circular grooves are fixedly connected to second hydraulic rods, the other ends of the second hydraulic rods are fixedly connected to the lower outer wall of the lifting seat, and two symmetrical adjustment slide rods are fixedly connected between the two symmetrical lifting seats, and the adjustment slide rods are movably connected to the inner wall of the inner slide seat.

[0019] Preferably, multiple inner slides are provided with threaded holes, the thread directions of the threaded holes on the two symmetrical inner slides are opposite, and the same screw rod is provided inside the threaded holes on the two symmetrical inner slides, and the two ends of the screw rod are movably connected to the outer walls of the two lifting seats respectively.

[0020] Preferably, the upper outer wall of the top plate is fixedly connected to a top seat, a circular hole is opened on the top seat, the inner wall of the circular hole is fixedly connected to a reversing motor, the output end of the reversing motor is connected to a short shaft through a coupling, the other end of the short shaft is fixedly connected to a driving gear, and the middle outer wall of the screw rod is fixedly connected to a pulling sleeve tooth, and the pulling sleeve tooth and the driving gear are meshed through tooth grooves.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention is equipped with a platform, an electric slide rail, a lifting bracket, a turntable, a lifting seat, a top plate and an inner slide. The device uses a clamping assembly to achieve the clamping and fixing operation of circular tube bodies of different specifications, which is convenient for subsequent lifting and hoisting. The device has a simple structure and uses a clamping assembly to replace traditional rope fixation, thereby improving the fixing effect of the circular tube and avoiding the problem of falling off during the lifting process.

[0023] 2. The present invention provides a clamping assembly. The first hydraulic rod extends to drive the lower pressure block to move downward. The auxiliary roller on the bending arc pressure plate contacts and squeezes the left arc clamp and the right arc clamp. The left arc clamp and the right arc clamp flip on the connecting block, and the angle between the two is reduced to achieve clamping of the circular tube body; the auxiliary roller can improve the smoothness of movement between the bending arc pressure plate and the left arc clamp and the right arc clamp, and facilitates its squeezing with the left arc clamp and the right arc clamp, so that the left arc clamp and the right arc clamp are deflected by force to reduce the angle to achieve clamping; the two-way connecting column and the reset spring can reset the left arc clamp and the right arc clamp, and use the reverse force after the elastic deformation of the reset spring to increase the driving force for resetting the left arc clamp and the right arc clamp, so that the left arc clamp and the right arc clamp are convenient to move away from the circular tube body after the pressure is subsequently removed.

[0024] 3. The present invention provides a pressing assembly, and the pressing assembly is subjected to pressure. The angle between the left pressure plate and the right pressure plate increases, and the pressing assembly contacts and squeezes the outer wall of the circular tube body. During the squeezing process, the deflection spring undergoes elastic deformation, which provides a reverse force to increase the contact effect between the left pressure plate and the right pressure plate and the circular tube body, thereby improving the fixing effect of the clamping assembly and the pressing assembly on the circular tube body. The rubber layer can further increase the friction between the left pressure plate and the right pressure plate and the circular tube body.

[0025] 4. The present invention adjusts the reversing motor according to the length of the circular tube body on the turntable by setting a second hydraulic rod, an adjusting slide rod, a screw rod, a top seat, a reversing motor, a driving gear, a pulling sleeve and a circular tube body. The reversing motor drives the screw rod to rotate by engaging the driving gear and pulling the sleeve to adjust the positions of the two inner slides. Then the second hydraulic rod contracts and drives the lifting seat to move downward. After the circular tube body is clamped and fixed, the second hydraulic rod extends and drives the lifting seat to move upward. The circular tube body is lifted. Then, the electric slide rail drives the movement of the lifting bracket to transport the circular tube body. The screw rod is used to adjust the position of the inner slide, so that the device can adapt to the lifting operation of circular tube bodies of different lengths, thereby improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a steel-concrete composite beam cast-in-situ bridge deck suspension device proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the top plate of a steel-concrete composite beam cast-in-situ bridge deck suspension device proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the clamping components of a steel-concrete composite beam cast-in-situ bridge deck suspension device proposed in the present invention;

[0029] Figure 4 This is a schematic diagram of the connection block position structure of a steel-concrete composite beam cast-in-situ bridge deck suspension device proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the holding component of a steel-concrete composite beam cast-in-situ bridge deck suspension device proposed by the present invention;

[0031] Figure 6 This is a structural schematic diagram of a steel-concrete composite beam cast-in-situ bridge deck suspension device proposed by the present invention.

[0032] In the figure: 1. Platform; 2. Electric slide rail; 3. Lifting bracket; 4. Turntable; 5. Lifting seat; 6. Top plate; 7. Inner slide seat; 8. Lower pressure block; 9. Connecting block; 10. Bending arc pressure plate; 11. Left arc clamp; 12. Right arc clamp; 13. Bottom block; 14. First hydraulic rod; 15. Limiting slide bar; 16. Auxiliary roller; 17. Two-way connecting column; 18. Return spring; 19. L-shaped connecting block; 20. Center axis plate; 21. Left pressure plate; 22. Right pressure plate; 23. Rubber layer; 24. Deflection spring; 25. Second hydraulic rod; 26. Adjusting slide bar; 27. Screw rod; 28. Top seat; 29. ​​Reversing motor; 30. Driving gear; 31. Pulling gear; 32. Circular tube body. DETAILED DESCRIPTION

[0033] 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.

[0034] A steel-concrete composite beam cast-in-situ bridge deck suspension device, such as Figure 1 、 Figure 2 and Figure 3 As shown, it includes a platform 1, and two symmetrical slide grooves are provided on the upper outer wall of the platform 1. Electric slide rails 2 are provided inside the slide grooves, and the inner walls of the two slide grooves are slidably connected with multiple symmetrical lifting brackets 3. The upper outer wall of the platform 1 is connected with multiple equidistant transfer platforms 4 by bolts. The transfer platform 4 is located between the two lifting brackets 3, and the lifting brackets 3 are provided with slide grooves. The inner walls of the slide grooves are slidably connected with lifting seats 5. The two symmetrical lifting brackets 3 are connected with a top plate 6 by bolts. Two symmetrical slide grooves are provided on the lower outer wall of the top plate 6, and the inner walls of the slide grooves are slidably connected with inner slide seats 7. A clamping assembly is provided under the two inner slide seats 7, and the two clamping assemblies are provided with the same circular tube body 32.

[0035] Further, such as Figure 3 and Figure 4As shown, the clamping assembly includes a lower pressing block 8, a connecting block 9, a left arc clamp 11 and a right arc clamp 12. The outer walls of both sides of the lower pressing block 8 are connected to the arc pressure plate 10 by bolts. The bottom ends of the two arc pressure plates 10 are provided with grooves. The inner walls on both sides of the grooves are rotatably connected with auxiliary rollers 16 through bearings. The connecting block 9 is located below the lower pressing block 8. Two symmetrical grooves are provided on the connecting block 9. The inner walls on both sides of the two grooves are connected with short rods by bolts. The left arc clamp 11 and the right arc clamp The clamps 12 are rotatably connected to the outer walls of the two short rods through bearings. The auxiliary roller 16 can improve the smoothness of the movement between the bending arc pressure plate 10 and the left arc clamp 11 and the right arc clamp 12, and facilitate the extrusion of the left arc clamp 11 and the right arc clamp 12, so that the left arc clamp 11 and the right arc clamp 12 are deflected by force to reduce the angle to achieve clamping; the lower outer wall of the inner slide 7 is connected to the bottom block 13 by bolts, and a circular hole groove is opened on the bottom block 13. The inner wall of the circular hole groove is connected to the first hydraulic rod 14 by bolts. The other end of the hydraulic rod 14 is connected to the upper outer wall of the lower pressure block 8 by bolts, and two symmetrical circular holes are provided on the lower pressure block 8, the two circular holes are respectively located on both sides of the first hydraulic rod 14, and the inner walls of the two circular holes are slidably connected to the limit slide bar 15, and the two ends of the two limit slide bars 15 are respectively connected to the lower outer wall of the bottom block 13 and the upper outer wall of the connecting block 9 by bolts; two symmetrical two-way connecting columns 17 are provided between the two L-shaped connecting blocks 19, and the two-way connecting columns 17 are connected to the outer walls of the two-way connecting columns 17 by bolts with a return spring 18 on both sides, and the other end of the return spring 18 is connected to the outer wall of the left arc clamp 11 or the right arc clamp 12 on the same side by bolts. The two-way connecting column 17 and the return spring 18 can reset the left arc clamp 11 and the right arc clamp 12, and the reverse action force after the elastic deformation of the return spring 18 is used to increase the driving force for resetting the left arc clamp 11 and the right arc clamp 12, so that the left arc clamp 11 and the right arc clamp 12 are away from the circular tube body 32 after the pressure is subsequently removed.

[0036] Furthermore, if Figure 4 and Figure 5As shown, the lower outer wall of the connecting block 9 is connected to two symmetrical L-shaped connecting blocks 19 by bolts, and the L-shaped connecting block 19, the left arc clamp 11 and the right arc clamp 12 are provided with a holding assembly; the holding assembly includes a central axis plate 20, a left pressure plate 21 and a right pressure plate 22, and the central axis plate 20 and the L-shaped connecting block, the left arc clamp 11 and the right arc clamp 12 are all connected by bolts; two symmetrical grooves are provided on the central axis plate 20, and the inner walls on both sides of the groove are connected with a rotating rod by bolts, and the outer wall of the rotating rod is rotatably connected to the left pressure plate 21 or the right pressure plate 22 through a bearing, and the left pressure plate Arc grooves are provided on the left and right pressure plates 21 and 22, and the inner walls of the arc grooves are connected to rubber layers 23 by bolts. Multiple symmetrically distributed deflection springs 24 are connected between the left and right pressure plates 21 and 22 by bolts. The deflection springs 24 undergo elastic deformation, which provides a reverse force to increase the contact effect between the left and right pressure plates 21 and 22 and the circular tube body 32, thereby improving the fixing effect of the clamping assembly and the pressing assembly on the circular tube body 32. The rubber layer 23 can further increase the friction between the left and right pressure plates 21 and 22 and the circular tube body 32.

[0037] Furthermore, if Figure 2 and Figure 6 As shown, multiple lifting brackets 3 are provided with circular grooves, and the inner walls of the circular grooves are connected to the second hydraulic rod 25 by bolts. The other end of the second hydraulic rod 25 is connected to the lower outer wall of the lifting seat 5 by bolts, and two symmetrical lifting seats 5 are connected by bolts with two symmetrical adjustment slides 26, which are slidably connected to the inner wall of the inner slide 7; multiple inner slides 7 are provided with threaded holes, and the threaded directions of the threaded holes on the two symmetrical inner slides 7 are opposite, and the same screw rod 27 is set inside the threaded holes on the two symmetrical inner slides 7, and the two ends of the screw rod 27 are respectively connected to the two lifting seats 5 are rotatably connected by bearings, and the position of the inner slide seat 7 is adjusted by the screw rod 27, so that the device can adapt to the hoisting operation of the circular tube body 32 of different lengths, thereby improving the applicability of the device; the upper outer wall of the top plate 6 is connected to the top seat 28 by bolts, and a circular hole is opened on the top seat 28. The inner wall of the circular hole is connected to the reversing motor 29 by bolts, and the output end of the reversing motor 29 is connected to the short shaft through a coupling, and the other end of the short shaft is connected to the driving gear 30 by bolts, and the middle outer wall of the screw rod 27 is connected to the pulling sleeve gear 31 by bolts, and the pulling sleeve gear 31 is meshed with the driving gear 30 through tooth grooves.

[0038] Working principle: After the electric slide rail 2 controls the lifting bracket 3 to move to both sides of the turntable 4, the electric slide rail 2 stops working and adjusts the reversing motor 29 according to the length of the circular tube body 32 on the turntable 4. The reversing motor 29 engages the active gear 30 to pull the sleeve gear 31 to drive the screw rod 27 to rotate, adjust the position of the two inner slide seats 7, and then the second hydraulic rod 25 contracts to drive the lifting seat 5 to move downward until the holding assembly on the L-shaped connecting block 19 contacts the outer wall of the circular rod body. At this time, the left arc clamp 11 and the right arc clamp 12 are respectively located on both sides of the circular tube body 32. The first hydraulic rod 14 extends to drive the lower pressure block 8 to move downward, and the auxiliary roller 16 on the bending arc pressure plate 10 contacts and squeezes the left arc clamp 11 and the right arc clamp 12. The left arc clamp 11 and the right arc clamp 12 flip on the connecting block 9, and the angle between the two The left and right pressure plates 21 and 22 are pressed together to form a circle, and the circular tube body 32 is lifted up. Then, the lifting bracket 3 is moved upwards to move the lifting bracket 3. The lifting bracket 3 is moved by the electric slide 24 to move the lifting bracket 3.

[0039] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A steel-concrete composite beam cast-in-situ bridge deck suspension device, comprising a platform (1), characterized in that: The upper outer wall of the platform (1) is provided with two symmetrical first slide grooves, the interior of each of the first slide grooves is provided with an electric slide rail (2), and the inner walls of the two first slide grooves are movably connected to a plurality of symmetrical hanging brackets (3), the upper outer wall of the platform (1) is fixedly connected to a plurality of equidistant transfer tables (4), the transfer tables (4) are located between the two hanging brackets (3), and the hanging brackets (3) are provided with a second slide groove, the inner walls of the second slide grooves are movably connected to a lifting seat (5), a top plate (6) is fixedly connected between the two symmetrical hanging brackets (3), the lower outer wall of the top plate (6) is provided with two symmetrical third slide grooves, and the inner walls of the third slide grooves are movably connected to an inner slide seat (7), a clamping assembly is provided below the two inner slide seats (7), and the two clamping assemblies are provided with the same circular tube body (32); The clamping assembly comprises a lower pressing block (8), a connecting block (9), a left arc clamp (11) and a right arc clamp (12), the outer walls of both sides of the lower pressing block (8) are fixedly connected with an arc bending pressure plate (10), the bottom ends of the two arc bending pressure plates (10) are provided with grooves, and the inner walls on both sides of the grooves are movably connected with an auxiliary roller (16), and the connecting block (9) is located below the lower pressing block (8), and two symmetrical grooves are provided on the connecting block (9), and the inner walls on both sides of the two grooves are fixedly connected with a short rod, and the left arc clamp (11) and the right arc clamp (12) are movably connected to the outer walls of the two short rods respectively; the inner The lower outer wall of the slide (7) is fixedly connected to a bottom block (13), a circular hole groove is provided on the bottom block (13), and the inner wall of the circular hole groove is fixedly connected to a first hydraulic rod (14), the other end of the first hydraulic rod (14) is fixedly connected to the upper outer wall of the lower pressing block (8), and the lower pressing block (8) is provided with two symmetrical circular holes, the two circular holes are respectively located on both sides of the first hydraulic rod (14), and the inner walls of the two circular holes are movably connected to the limiting slide rod (15), and the two ends of the two limiting slide rods (15) are respectively fixedly connected to the lower outer wall of the bottom block (13) and the upper outer wall of the connecting block (9); The lower outer wall of the connecting block (9) is fixedly connected to two symmetrical L-shaped connecting blocks (19), and the L-shaped connecting blocks (19), the left arc clamp (11) and the right arc clamp (12) are all provided with a pressing assembly; Two symmetrical bidirectional connecting columns (17) are provided between the two L-shaped connecting blocks (19), and the outer walls on both sides of the bidirectional connecting columns (17) are fixedly connected with a return spring (18), and the other end of the return spring (18) is fixedly connected to the outer wall of the left arc clamp (11) or the right arc clamp (12) on the same side.

2. The steel-concrete composite beam cast-in-situ bridge deck suspension device according to claim 1, characterized in that: The pressing assembly comprises a central axis plate (20), a left pressing plate (21) and a right pressing plate (22), and the central axis plate (20) is fixedly connected to the L-shaped connecting block (19), the left arc clamp (11) and the right arc clamp (12).

3. The steel-concrete composite beam cast-in-situ bridge deck suspension device according to claim 2, characterized in that: The central axis plate (20) is provided with two symmetrical grooves, and a rotating rod is fixedly connected between the inner walls of both sides of the groove. The outer wall of the rotating rod is movably connected to the left pressure plate (21) or the right pressure plate (22), and an arc groove is provided on the left pressure plate (21) and the right pressure plate (22). The inner walls of the arc groove are fixedly connected with a rubber layer (23), and a plurality of symmetrically distributed deflection springs (24) are fixedly connected between the left pressure plate (21) and the right pressure plate (22).

4. The steel-concrete composite beam cast-in-situ bridge deck suspension device according to claim 3, characterized in that: A plurality of the hoisting brackets (3) are provided with circular grooves, the inner walls of the circular grooves are fixedly connected to second hydraulic rods (25), the other end of the second hydraulic rod (25) is fixedly connected to the lower outer wall of the lifting seat (5), and two symmetrical adjustment slides (26) are fixedly connected between the two symmetrical lifting seats (5), and the adjustment slides (26) are movably connected to the inner wall of the inner slide seat (7).

5. The steel-concrete composite beam cast-in-situ bridge deck suspension device according to claim 4, characterized in that: A plurality of the inner slide seats (7) are provided with threaded holes, the threaded directions of the threaded holes on the two symmetrical inner slide seats (7) are opposite, and the same screw rod (27) is provided inside the threaded holes on the two symmetrical inner slide seats (7), and the two ends of the screw rod (27) are movably connected to the outer walls of the two lifting seats (5).

6. The steel-concrete composite beam cast-in-situ bridge deck suspension device according to claim 5, characterized in that: The upper outer wall of the top plate (6) is fixedly connected to a top seat (28), a circular hole is opened on the top seat (28), and a reversing motor (29) is fixedly connected to the inner wall of the circular hole. The output end of the reversing motor (29) is connected to a short shaft through a coupling, and the other end of the short shaft is fixedly connected to a driving gear (30). The middle outer wall of the screw rod (27) is fixedly connected to a pulling sleeve tooth (31), and the pulling sleeve tooth (31) and the driving gear (30) are meshed through tooth grooves.

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