CN114382012A

CN114382012A - Bridge construction lifts by crane better hanging flower basket of wind-resistance for equipment

Info

Publication number: CN114382012A
Application number: CN202210108672.9A
Authority: CN
Inventors: 齐欣
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-04-22

Abstract

The invention relates to the technical field of bridge construction, in particular to a hanging basket with better wind resistance for bridge construction hoisting equipment, which comprises: the hanging basket body, the hanging basket body includes the fixed plate, the inside movable mounting of fixed plate has the lead screw, the slidable surface mounting of fixed plate has the slide, the top surface fixed mounting of slide has the book to put the subassembly, the both ends fixed mounting of fixed plate has the fixed block, the mounting groove has been seted up on the lateral wall of fixed block, the tip winding of rolling the subassembly of putting has wire rope, wire rope's bottom is colluded and is hung there is the frame. When the hanging basket is used, the roller is started to enable the sliding block to stably move on the steel pipe, the stroking sleeve can be driven to slide on the steel wire rope, the stroking sleeve stroks the steel wire rope to limit the swinging amplitude of the steel wire rope, the steel wire rope is in a vertical state, the frame is kept stable, the wind resistance of the frame is improved, and the use safety is guaranteed.

Description

Bridge construction lifts by crane better hanging flower basket of wind-resistance for equipment

Technical Field

The invention relates to the technical field of bridge construction, in particular to a hanging basket with good wind resistance for bridge construction hoisting equipment.

Background

In order to ensure the safe and smooth traffic of the society, the safety of urban infrastructure must be ensured, wherein the bridge detection and maintenance must be performed regularly, the bridge hanging basket mainly forms an independent and safe working platform under the bridge, so that workers can walk conveniently, the bridge hanging basket can provide a convenient and safe construction platform, the occupied pavement area is small, and the operation can be performed safely and efficiently without influencing the traffic.

But the bridge hanging flower basket can receive the crossing air current influence of bridge downside when using, and takes place to rock, and constructor is difficult to steadily stand, can't continue the construction, and the hanging flower basket collision bridge also can damage the pontic, has the potential safety hazard.

Therefore, in order to solve the above problems, a hanging basket for a bridge construction hoisting device with good wind resistance is provided.

Disclosure of Invention

The invention aims to provide a hanging basket with good wind resistance for bridge construction hoisting equipment, and aims to solve the problems that when the hanging basket for a bridge provided in the background technology is used, the hanging basket for the bridge is affected by cross airflow at the lower side of the bridge, the hanging basket for the bridge shakes, constructors cannot stand stably and cannot continue to construct the hanging basket, and the hanging basket collides with the bridge, so that a bridge body is damaged, and potential safety hazards exist.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a bridge construction lifting devices is with better hanging flower basket of wind-resistance, includes:

the hanging basket comprises a hanging basket body, wherein the hanging basket body comprises a fixed plate, a lead screw is movably mounted in the fixed plate, a sliding seat is slidably mounted on the surface of the fixed plate, a winding and unwinding assembly is fixedly mounted on the top surface of the sliding seat, fixed blocks are fixedly mounted at two ends of the fixed plate, a mounting groove is formed in the side wall of the fixed block, a steel wire rope is wound at the end part of the winding and unwinding assembly, a frame is hooked at the bottom end of the steel wire rope, a bridge main body is arranged on the upper side of the frame, and telegraph pole main bodies are fixedly mounted at two ends of the bridge main body;

the wind-resistant structure comprises a fastener, the fastener is fixedly mounted on the side wall of the fixed block, a steel pipe is mounted inside the fastener, a sliding block is movably mounted on the surface of the lower end of the steel pipe, rollers are movably mounted inside the sliding block, a fixed frame is fixedly connected to the side wall of the sliding block, and a stroking sleeve is fixedly mounted on the side wall of the fixed frame;

the movable structure comprises a tractor, the tractor is arranged on the top surface of the bridge main body, a rotary table is movably arranged on the top surface of the tractor, a telescopic arm is fixedly arranged on the top surface of the rotary table, and a cushion block is fixedly arranged on the bottom surface of the end portion of the telescopic arm.

Preferably, still including fixed knot structure, fixed knot structure includes the fixing base, fixing base fixed mounting is at the top surface of tractor, the top of fixing base articulates there is rotatory piece, the tip fixedly connected with cylinder of rotatory piece, the output fixedly connected with of cylinder turns over the board, the spout has been seted up to the bottom surface of turning over the board, the inside movable mounting of spout has the handspike, the inside slidable mounting of spout has interior baffle and outer baffle, the top surface fixed mounting who turns over the board has the piece of support.

Preferably, the fixed plate is located the both sides of bridge main part, the tip fixedly connected with micro motor of lead screw, it is total two sets of to roll up the subassembly of putting, the tip of flexible arm is inserted and is established the inside of mounting groove, and passes through bolt fixed connection between fixed block and the flexible arm, the frame is located the downside of bridge main part.

Preferably, the fastener is total two sets ofly, another group the fastener fixed mounting is on the outer wall of outer baffle, and two sets of align from top to bottom the fastener, the steel pipe runs through two sets of fasteners, the one end fixedly connected with micro motor of gyro wheel, the lateral wall of gyro wheel and the surface laminating of steel pipe.

Preferably, the sliding blocks are two groups in total and are fixedly connected through a fixing frame, the stroking sleeve is formed by mutually attaching two groups of arc-shaped plates and is fixed through a bolt, and the stroking sleeve is arranged on the outer side of the steel wire rope.

Preferably, the mobile structures are two groups, the two groups of mobile structures are respectively positioned on two sides of the top surface of the bridge main body, and the tractor is provided with a controller.

Preferably, the sliding chutes are two groups, the top ends of the inner baffle and the outer baffle are respectively and slidably mounted inside the two groups of sliding chutes, the left end of the hand lever is exposed out of the left wall of the turning plate, and the two groups of hand levers are respectively in threaded connection with the top ends of the inner baffle and the outer baffle.

Preferably, movable balls are mounted on the inner walls of the inner baffle and the outer baffle, and the inner baffle and the outer baffle are respectively attached to the inner wall and the outer wall of the two ends of the bridge main body.

Compared with the prior art, the invention has the beneficial effects that: when the hanging basket is used, the roller is started to enable the sliding block to stably move on the steel pipe, the stroking sleeve can be driven to slide on the steel wire rope, the stroking sleeve stroks the steel wire rope to limit the swinging amplitude of the steel wire rope, the steel wire rope is in a vertical state, the frame is kept stable, the wind resistance of the frame is improved, and the use safety is guaranteed.

The hanging basket body is provided with the hanging basket body, the wind-resistant structure and the moving structure, the sliding block is sleeved on the steel pipe, the steel wire rope is installed inside the smoothing sleeve, the steel pipe is fixed inside the fastener, the micro motor is started to drive the roller to rotate, the roller and the steel pipe are rubbed to drive the sliding block to move up and down along the steel pipe, meanwhile, the sliding block is driven by the fixing frame to smooth the sleeve on the steel wire rope, the swinging amplitude of the steel wire rope is gradually reduced, the steel wire rope is static, the frame stops shaking along with the steel wire rope, the wind-resistant performance of the frame can be improved, the frame can be conveniently placed on the ground again, and the use safety of the hanging basket body is guaranteed.

Be provided with fixed knot and construct, the upset turns over the board, turn over the both sides that the board drove interior baffle and outer baffle and removed bridge main body lateral wall, and through rotatory two sets of handspikes, can adjust the position of interior baffle and outer baffle respectively, make it hug closely bridge main body's lateral wall, can be with the stable fixing of moving structure in bridge main body, in order to avoid moving structure displacement or slope, and then can lead to the hanging flower basket body to lose fixedly, cause the production potential safety hazard, simultaneously when the wind rises, through a set of fixed knot structure of upset, make its slope, and laminate with the cushion, can support flexible arm at the downside, improve the rigidity of flexible arm, make a set of flexible arm can carry out effectual support to the hanging flower basket body.

Drawings

FIG. 1 is a schematic structural side view of a basket body according to the present invention;

FIG. 2 is a schematic structural front view of a basket body according to the present invention;

FIG. 3 is a side view of the fixing frame of the present invention;

FIG. 4 is an exploded view of the mounting block of the present invention;

FIG. 5 is a schematic sectional side view of the fixing plate according to the present invention;

FIG. 6 is an exploded view of the structure of the mounting structure of the present invention;

FIG. 7 is a schematic side sectional view of a sheath of the present invention.

In the figure: 1. a basket body; 11. a fixing plate; 12. a screw rod; 13. a slide base; 14. a winding and unwinding assembly; 15. a fixed block; 16. mounting grooves; 17. a wire rope; 18. a frame; 2. a wind-resistant structure; 21. a fastener; 22. a steel pipe; 23. a slider; 24. a roller; 25. a fixed mount; 26. stroking the sheath; 3. a moving structure; 31. a tractor; 32. a turntable; 33. a telescopic arm; 34. cushion blocks; 4. a fixed structure; 41. a fixed seat; 42. rotating the block; 43. a cylinder; 44. turning over a plate; 45. a chute; 46. a handle; 47. an inner baffle; 48. an outer baffle; 49. a resisting block; 5. a bridge main body; 6. a pole body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, an embodiment of the present invention is shown:

the reel-to-reel assembly 14, the micro motor, the cylinder 43, the controller, the turntable 32 and the telescopic arm 33 used in the present application are directly commercially available products, and the principle and the connection manner thereof are well known in the prior art, and thus will not be described herein again.

The utility model provides a bridge construction lifting devices is with better hanging flower basket of wind-resistance, includes:

the hanging basket comprises a hanging basket body 1, wherein the hanging basket body 1 comprises a fixing plate 11, a screw rod 12 is movably mounted in the fixing plate 11, a sliding seat 13 is slidably mounted on the surface of the fixing plate 11, a winding and unwinding assembly 14 is fixedly mounted on the top surface of the sliding seat 13, fixing blocks 15 are fixedly mounted at two ends of the fixing plate 11, a mounting groove 16 is formed in the side wall of each fixing block 15, a steel wire rope 17 is wound on the end part of the winding and unwinding assembly 14, a frame 18 is hung at the bottom end of the steel wire rope 17 in a hooking mode, a bridge main body 5 is arranged on the upper side of the frame 18, and telegraph pole main bodies 6 are fixedly mounted at two ends of the bridge main body 5;

the wind-resistant structure 2 comprises a fastener 21, the fastener 21 is fixedly installed on the side wall of the fixed block 15, a steel pipe 22 is installed inside the fastener 21, a sliding block 23 is movably installed on the surface of the lower end of the steel pipe 22, a roller 24 is movably installed inside the sliding block 23, a fixed frame 25 is fixedly connected to the side wall of the sliding block 23, and a stroking sleeve 26 is fixedly installed on the side wall of the fixed frame 25;

the moving structure 3 comprises a tractor 31, the tractor 31 is arranged on the top surface of the bridge main body 5, a rotary table 32 is movably mounted on the top surface of the tractor 31, a telescopic arm 33 is fixedly mounted on the top surface of the rotary table 32, a cushion block 34 is fixedly mounted on the bottom surface of the end part of the telescopic arm 33, and the sliding block 23 moves up and down on the surface of the steel pipe 22 and can drive the stroking sleeve 26 to slide on the steel wire rope 17, and the stroking sleeve 26 stroks the steel wire rope 17 to limit the swing amplitude of the steel wire rope 17, so that the steel wire rope 17 is in a vertical state, the frame 18 is kept stable, the wind resistance of the frame 18 is improved, and the use safety is ensured.

Further, the hanging basket comprises a fixed structure 4, the fixed structure 4 comprises a fixed seat 41, the fixed seat 41 is fixedly installed on the top surface of the tractor 31, the top end of the fixed seat 41 is hinged with a rotating block 42, the end part of the rotating block 42 is fixedly connected with an air cylinder 43, the output end of the air cylinder 43 is fixedly connected with a turning plate 44, the bottom surface of the turning plate 44 is provided with a chute 45, a hand lever 46 is movably installed inside the chute 45, an inner baffle 47 and an outer baffle 48 are slidably installed inside the chute 45, a resisting block 49 is fixedly installed on the top surface of the turning plate 44, the movable structure 3 can be fixed on the bridge main body 5 when the hanging basket body 1 is used, a stable fulcrum is provided for the use of the hanging basket body 1, and when the telegraph pole main body 6 is hidden, the lower end of the movable structure 3 can be supported, so that one group of telescopic arms 33 can support the weight of the whole hanging basket body 1 to ensure that the movable structure 3 can move, the basket body 1 remains stable.

Further, the fixed plate 11 is located the both sides of bridge main body 5, the tip fixedly connected with micro motor of lead screw 12, it is total two sets of to roll up subassembly 14 of putting, the inside of establishing at mounting groove 16 is inserted to the tip of flexible arm 33, and pass through bolt fixed connection between fixed block 15 and the flexible arm 33, frame 18 is located the downside of bridge main body 5, make wire rope 17 be located the both sides of bridge main body 5, can guarantee wire rope 17 when receiving and releasing, can not contact with bridge main body 5, avoid bridge main body 5 and wire rope 17's wearing and tearing, guarantee that the speed that wire rope 17 receive and releases is stable, can support fixedly hanging flower basket body 1 through flexible arm 33.

Further, fastener 21 is total two sets ofly, another set of fastener 21 fixed mounting is on outer baffle 48's outer wall, and align from top to bottom two sets of fasteners 21, steel pipe 22 runs through two sets of fasteners 21, the one end fixedly connected with micro motor of gyro wheel 24, the lateral wall of gyro wheel 24 and the surface laminating of steel pipe 22, micro motor provides power for gyro wheel 24's rotation, can drive slider 23 through gyro wheel 24 and move about on steel pipe 22, can fix fastener 21 through two sets of fasteners 21, in order to guarantee steel pipe 22's rigidity.

Furthermore, the two groups of sliding blocks 23 are arranged, the two groups of sliding blocks 23 are fixedly connected through a fixing frame 25, the stroking sleeve 26 is formed by mutually attaching two groups of arc-shaped plates and is fixed through bolts, the stroking sleeve 26 is sleeved on the outer side of the steel wire rope 17 to ensure that the track of the stroking sleeve 26 is fixed during movement, and the stroking sleeve can limit the swing amplitude of the steel wire rope 17 and improve the wind resistance of the frame 18 by sliding on the steel wire rope 17.

Further, the moving structures 3 are two groups, the two groups of moving structures 3 are respectively located on two sides of the top surface of the bridge main body 5, the tractor 31 is provided with a controller, and two ends of the frame 18 can be respectively fixed through the two groups of moving structures 3.

Further, the spout 45 is total two sets ofly, the top of interior baffle 47 and outer baffle 48 is sliding mounting respectively in the inside of two sets of spouts 45, the left end of handspike 46 exposes the left wall of turning over board 44, and two sets of handspikes 46 respectively with the top threaded connection of interior baffle 47 and outer baffle 48, through rotatory two sets of handspikes 46, can adjust the position of interior baffle 47 and outer baffle 48 respectively, so that interior baffle 47 and outer baffle 48 fix on bridge main part 5, so as to fix removal structure 3.

Further, all install movable ball on the inner wall of interior baffle 47 and outer baffle 48, and interior baffle 47 and outer baffle 48 laminate with the interior outer wall at 5 both ends of bridge main part respectively, make moving structure 3 when moving, need not to pack up fixed knot constructs 4, further improve moving structure 3's stability, labour saving and time saving simultaneously.

The working principle is as follows: before use, the tractor 31 is moved to the top side of the bridge girder 5, and the frame 18 is placed on the underside of the bridge girder 5, then the telescopic arm 33 is controlled to extend, the top end of the telescopic arm 33 is inserted into the mounting groove 16, the steel wire ropes 17 are positioned at two sides of the bridge main body 5 through bolt fixing, the turning plate 44 is turned, the turning plate 44 drives the inner baffle plate 47 and the outer baffle plate 48 to move to two sides of the side wall of the bridge main body 5, and by rotating the two groups of hand levers 46, the positions of the inner baffle 47 and the outer baffle 48 can be respectively adjusted to be tightly attached to the side wall of the bridge main body 5, then the winding and unwinding component 14 is controlled to run, the steel wire rope 17 is lengthened, after the steel wire rope 17 is connected with the frame 18, the constructor enters the interior of the frame 18 and controls the winding and unwinding assembly 14 to operate, winds the steel wire rope 17, the frame 18 can be lifted to bring the frame 18 close to the bottom surface of the bridge main body 5, so as to maintain the bottom surface of the bridge main body 5.

When wind blows, the frame 18 is affected by airflow to shake and drive the steel wire rope 17 to swing, at the moment, two groups of sliding blocks 23 are respectively sleeved on two groups of steel pipes 22, the surface of the roller 24 is attached to the side wall of the steel pipe 22, the steel wire rope 17 is arranged inside the stroking sleeve 26 through bolts, then, the steel pipes 22 are fixed inside the fasteners 21, so that the lower ends of the two sets of steel pipes 22 are positioned at the lower side of the bridge main body 5, by starting the micro motor, the roller 24 can be driven to rotate, the roller 24 rubs with the steel tube 22, the slide block 23 can be driven to move up and down along the steel pipe 22, meanwhile, the slide block 23 drives the stroking sleeve 26 to strok on the steel wire rope 17 through the fixed frame 25, so as to gradually reduce the swing amplitude of the steel wire rope 17, so that the steel wire rope 17 is in a static state, the frame 18 stops swinging along with the static state, the wind resistance of the frame 18 can be improved, so that the frame 18 can be conveniently lowered to the ground again, and the use safety of the hanging basket body 1 is ensured.

When the hanging basket is used, the tractor 31 is controlled to move on the bridge main body 5, so that the frame 18 can be driven to move on the bottom surface of the bridge main body 5, the maintenance efficiency can be improved, meanwhile, when the hanging basket is blocked by the telegraph pole main body 6, the micro motor is started to drive the screw rod 12 to rotate, the screw rod 12 is in threaded connection with the sliding seat 13, the winding and unwinding assemblies 14 can be driven to move on the fixing plate 11, two groups of winding and unwinding assemblies 14 can move to the end part of the fixing plate 11, the screw on the fixing block 15 close to one side of the telegraph pole main body 6 is screwed off, the fixing can be released, the hand lever 46 is rotated, the inner baffle 47 and the outer baffle 48 are not in contact with the bridge main body 5, the turning plate 44 is turned, the air cylinder 43 is controlled to contract, the turning plate 44 is inclined and is aligned with the cushion block 34, the control air cylinder 43 extends out, the abutting block 49 is attached to the cushion block 34, the fixing structure 4 can support the moving structure 3 at the lower side, so that one group of the telescopic arms 33 can effectively support the hanging basket body 1, the telescopic arms 33 are controlled to contract, the end parts of the telescopic arms 33 can be withdrawn from the inside of the mounting groove 16, so that a gap exists between the telescopic arms 33 on one side and the fixing block 15, when the tractor 31 moves conveniently, the telegraph pole main body 6 moves between the two groups of telescopic arms 33 through the gap, then the hanging basket body 1, the moving structure 3 and the fixing structure 4 are restored, the operation is repeated on the other side, namely, the frame 18 can be moved under the condition that the operation of constructors is not influenced, the telegraph pole main body 6 can be effectively avoided, the frame 18 does not need to be repeatedly hooked, trouble and labor are saved, and the using effect is better.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a bridge construction lifting devices is with better hanging flower basket of wind-resistance, a serial communication port, includes:

the hanging basket body (1) comprises a fixing plate (11), a screw rod (12) is movably mounted inside the fixing plate (11), a sliding seat (13) is slidably mounted on the surface of the fixing plate (11), a winding and unwinding assembly (14) is fixedly mounted on the top surface of the sliding seat (13), fixing blocks (15) are fixedly mounted at two ends of the fixing plate (11), mounting grooves (16) are formed in the side walls of the fixing blocks (15), steel wire ropes (17) are wound at the end portions of the winding and unwinding assembly (14), a frame (18) is connected to the bottom end of each steel wire rope (17), a bridge main body (5) is arranged on the upper side of each frame (18), and telegraph pole main bodies (6) are fixedly mounted at two ends of each bridge main body (5);

the wind-resistant structure (2) comprises a fastener (21), the fastener (21) is fixedly installed on the side wall of a fixing block (15), a steel pipe (22) is installed inside the fastener (21), a sliding block (23) is movably installed on the surface of the lower end of the steel pipe (22), a roller (24) is movably installed inside the sliding block (23), a fixing frame (25) is fixedly connected to the side wall of the sliding block (23), and a stroking sleeve (26) is fixedly installed on the side wall of the fixing frame (25);

moving structure (3), moving structure (3) including tractor (31), tractor (31) set up the top surface at bridge main part (5), the top surface movable mounting of tractor (31) has revolving stage (32), the top surface fixed mounting of revolving stage (32) has flexible arm (33), the bottom surface fixed mounting of flexible arm (33) tip has cushion (34).

2. The hanging basket for the bridge construction hoisting equipment with the good wind resistance according to the claim 1, is characterized in that: still including fixed knot structure (4), fixed knot structure (4) include fixing base (41), fixing base (41) fixed mounting is at the top surface of tractor (31), the top of fixing base (41) articulates there is rotatory piece (42), tip fixedly connected with cylinder (43) of rotatory piece (42), the output fixedly connected with of cylinder (43) turns over board (44), spout (45) have been seted up to the bottom surface that turns over board (44), the inside movable mounting of spout (45) has handle bar (46), the inside slidable mounting of spout (45) has interior baffle (47) and outer baffle (48), the top surface fixed mounting who turns over board (44) supports piece (49).

3. The hanging basket for the bridge construction hoisting equipment with the good wind resistance according to the claim 1, is characterized in that: the fixed plate (11) is located the both sides of bridge main part (5), the tip fixedly connected with micro motor of lead screw (12), it is total two sets of to roll up subassembly (14) of putting, the tip of flexible arm (33) is inserted and is established the inside of mounting groove (16), and passes through bolt fixed connection between fixed block (15) and flexible arm (33), frame (18) are located the downside of bridge main part (5).

4. The hanging basket for the bridge construction hoisting equipment with the good wind resistance according to the claim 1, is characterized in that: fastener (21) are total two sets ofly, another group fastener (21) fixed mounting is on the outer wall of outer baffle (48), and two sets of align from top to bottom fastener (21), two sets of fastener (21) are run through in steel pipe (22), the one end fixedly connected with micro motor of gyro wheel (24), the lateral wall of gyro wheel (24) and the surface laminating of steel pipe (22).

5. The hanging basket for the bridge construction hoisting equipment with the good wind resistance according to the claim 1, is characterized in that: the steel wire rope straightening device is characterized in that the number of the sliding blocks (23) is two, the sliding blocks (23) are fixedly connected through a fixing frame (25), the straightening sleeve (26) is formed by mutually attaching two groups of arc-shaped plates and is fixed through a bolt, and the straightening sleeve (26) is sleeved on the outer side of the steel wire rope (17).

6. The hanging basket for the bridge construction hoisting equipment with the good wind resistance according to the claim 1, is characterized in that: the mobile structures (3) are two groups in total, the two groups of mobile structures (3) are respectively positioned on two sides of the top surface of the bridge main body (5), and the tractor (31) is provided with a controller.

7. The hanging basket for the bridge construction hoisting equipment with the better wind resistance according to the claim 2, is characterized in that: the novel turnover door is characterized in that the number of the sliding grooves (45) is two, the top ends of the inner baffle (47) and the outer baffle (48) are respectively and slidably mounted in the two sliding grooves (45), the left end of the hand lever (46) is exposed out of the left wall of the turnover plate (44), and the two hand levers (46) are respectively in threaded connection with the top ends of the inner baffle (47) and the outer baffle (48).

8. The hanging basket for the bridge construction hoisting equipment with the better wind resistance according to the claim 2, is characterized in that: the inner walls of the inner baffle (47) and the outer baffle (48) are provided with movable balls, and the inner baffle (47) and the outer baffle (48) are respectively attached to the inner wall and the outer wall of the two ends of the bridge main body (5).