Bridge anti-falling beam lifting device and method

Abstract

The invention relates to the technical field of bridge construction hoisting, and provides a bridge anti-falling beam hoisting device and method.The bridge anti-falling beam hoisting device comprises a universal moving base, a lifting table is installed on the surface of the universal moving base and used for being kept on the same plane with a pier body table top, and a height-adjustable sliding table is arranged on the surface of the lifting table and used for placing an anti-falling beam; and the anti-falling beam is convenient to move and mount. According to the lifting device for the bridge anti-falling beam, the particularity of the mounting position of the bridge anti-falling beam is combined, the lifting device for the bridge anti-falling beam can lift the anti-falling beam on a lifting table, and the anti-falling beam can be pushed to the position between a pier body and a bridge body to assist in mounting the anti-falling beam after the height is shortened; the telescopic and rotating structure is arranged, so that the anti-falling beam and the height-adjustable sliding table at the bottom of the anti-falling beam can be conveniently pushed to the table top of the pier body, the height-adjustable sliding table can be driven to ascend and descend, the anti-falling beam is in contact with a plane needing to be installed, fastening installation is facilitated, two purposes are achieved, and the hoisting installation efficiency of the anti-falling beam is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction hoisting, and in particular to a bridge anti-falling beam hoisting device and method. Background Art

[0002] Anti-fall beams are an important safety measure in construction projects. Their main purpose is to prevent the beam from collapsing due to improper stress, material defects, or environmental factors during construction or use. During the installation of anti-fall beams, there is a step at the pier installation location, and the distance between the pier and the beam is not high enough, making it inconvenient to use traditional lifting equipment to cooperate with the installation of anti-fall beams. Therefore, the traditional installation method of anti-fall beams is generally to use a hand winch in conjunction with a universal trolley. First, at least two people are required to use a hand winch to lift the anti-fall beam onto the universal trolley, and then push the universal trolley to the step of the pier body. The universal trolley and the step of the pier body are kept on the same plane, and then the anti-fall beam is moved to the pier body table by pulling with a rope, pushing manually, etc., and then by adding a pad at the bottom of the pier body table, the top of the anti-fall beam is in contact with the top surface to be installed for fastening and installation.

[0003] This installation method not only requires the cooperation of multiple people, but is also time-consuming and labor-intensive, greatly reducing the installation efficiency of the bridge anti-fall beam. Therefore, based on the above problems, a bridge anti-fall beam lifting device and method are proposed for the lifting and installation of the anti-fall beam. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bridge anti-fall beam lifting device, comprising a universal movable base, a lifting platform installed on the surface of the universal movable base, used to maintain it in the same plane as the pier body table, a height-adjustable slide is provided on the surface of the lifting platform, used to place the anti-fall beam, facilitating the movement and installation of the anti-fall beam, and a rotatable lifting and pushing mechanism is provided on one side of the lifting platform for hoisting the anti-fall beam and pushing the anti-fall beam to move; The lifting and pushing mechanism includes a turntable mounted on the surface of a universal movable base, a multi-section telescopic cylinder is fixed on the top of the turntable, a slide is mounted on the top of the multi-section telescopic cylinder, a telescopic and rotating structure is slidably connected inside the slide, one end of the telescopic and rotating structure is connected to a hook, a quick positioning mechanism is provided between the slide and the telescopic and rotating structure, and the quick positioning mechanism is used to fix the position of the telescopic and rotating structure inside the slide; The height-adjustable slide includes a base plate, a pulley is provided at the bottom of the base plate, a sliding limit track is provided on the surface of the lifting platform, a placement platform is provided above the base plate, a cross-lifting structure is provided on the surface of the placement platform, and a card block is fixed at one end of the telescopic and rotating structure, and the card block matches one end of the cross-lifting structure.

[0005] Preferably, the telescopic and rotation structure includes a shell, the interior of the shell is divided into a telescopic chamber and a spring chamber, the internal rotation of the telescopic chamber is connected to a threaded rod, the outer surface of the threaded rod is provided with a threaded sleeve, one end of the threaded sleeve extends through the shell to the outside and is connected to the hook and the block.

[0006] Preferably, a fixing plate is fixed inside the telescopic cavity, a fixing ring is connected to the surface of the fixing plate, the threaded rod passes through the openings in the middle of the fixing plate and the fixing ring, the outer surface of the threaded rod is rotatably connected to a positioning plate, a positioning sleeve is provided on one side of the positioning plate and located on the outside of the threaded rod, and a fixed switching assembly is provided between the positioning sleeve and the fixing ring.

[0007] Preferably, the inner wall of the telescopic cavity is connected to a rotating ring at one end away from the fixed switching component, and guide rods are respectively provided on both sides of the threaded sleeve. The two ends of the guide rod are respectively connected to the rotating ring and the positioning plate, and a sliding sleeve is provided on the outer surface of the guide rod, and the sliding sleeve is fixed to the threaded sleeve.

[0008] Preferably, the fixed switching assembly includes a telescopic fixer and a rotary fixer, the telescopic fixer is used to relatively fix the positions of the fixing ring and the positioning sleeve, and the rotary fixer is used to relatively fix the positions of the threaded rod and the positioning sleeve.

[0009] Preferably, the quick positioning mechanism includes a retractable positioner and a pull rope disassembly assembly provided on both sides of the housing, and a first positioning hole and a second positioning hole are respectively provided at both ends of the two symmetrical side walls of the slide. The retractable positioner includes a fixed shell embedded in the side wall of the housing, a first spring is provided inside the fixed shell, a positioning block is fixed to one end of the first spring, and the positioning block is engaged with the first positioning hole or the second positioning hole; The pull rope disassembly assembly includes two spring pull rods arranged inside the spring cavity, one end of the two spring pull rods extends to the outside of the shell and is commonly connected to a cross bar, the other end of the spring pull rod is connected to a steel wire rope, and the end of the steel wire rope away from the spring pull rod is connected to the positioning block.

[0010] Preferably, the cross lifting structure includes an adjusting screw and a sliding cross frame, one end of the adjusting screw extends out of one end of the side wall of the bottom plate and is fixed with a U-shaped slot, and the U-shaped slot matches the card block.

[0011] Preferably, a cover plate is provided on the top of the shell, a driving motor is fixed on the surface of the cover plate, and the driving motor is connected to the threaded rod through a gear assembly.

[0012] The present invention provides a bridge beam lifting device and method to prevent falling beams. It has the following beneficial effects: The present invention combines the particularity of the installation position of the bridge anti-fall beam and proposes a lifting device for the bridge anti-fall beam. The device can not only hoist the anti-fall beam on the lifting platform, but also push it to between the pier body and the bridge beam body after shortening the height to assist in the installation of the anti-fall beam. The telescopic and rotating structure is provided, which not only facilitates the pushing of the anti-fall beam and the height-adjustable slide at its bottom to the table surface of the pier body, but also drives the height-adjustable slide to rise and fall, so that the anti-fall beam contacts the plane to be installed, thereby facilitating fastening and installation. It is a two-in-one device and greatly improves the lifting and installation efficiency of the anti-fall beam compared with the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional diagram of a bridge anti-falling beam lifting device according to the present invention in a first state; Figure 2 This is a perspective view of a second state of a bridge anti-falling beam lifting device according to the present invention; Figure 3 This is an overall structural diagram of the telescopic and rotating structure of a bridge anti-falling beam lifting device of the present invention; Figure 4 This is a partial structural diagram of a height-adjustable slide in a bridge beam-falling prevention lifting device according to the present invention; Figure 5 A bridge anti-falling beam lifting device of the present invention Figure 3 Enlarged view of point A in the middle; Figure 6 A bridge anti-falling beam lifting device of the present invention Figure 3 Middle local structure diagram; Figure 7 A bridge anti-falling beam lifting device of the present invention Figure 6 Middle partial cross-section; Figure 8 A bridge anti-falling beam lifting device of the present invention Figure 3 Enlarged view of point B in the middle; Figure 9 A bridge anti-falling beam lifting device of the present invention Figure 2 Enlarged view of point C in the middle; Figure 10 This is a diagram of a first use state of a bridge anti-falling beam lifting device according to the present invention; Figure 11 This is a diagram of a second use state of a bridge anti-falling beam lifting device according to the present invention; Figure 12 This is a diagram of the third usage state of a bridge anti-falling beam lifting device of the present invention.

[0014] Among them, 1. Universal movable base; 2. Lifting platform; 3. Lifting and pushing mechanism; 31. Multi-section telescopic cylinder; 32. Sliding seat; 33. Telescopic and rotating structure; 331. Housing; 332. Threaded rod; 333. Threaded sleeve; 334. Fixing plate; 335. Fixing ring; 336. Positioning plate; 337. Positioning sleeve; 338. Fixed switching assembly; 3381. Telescopic fixture; 3382. Rotating fixture; 339. Rotating ring; 3310. Guide rod; 3311. Slide; 3312, cover plate; 3313, drive motor; 34, hook; 35, quick positioning mechanism; 351, first positioning hole; 352, second positioning hole; 353, fixed shell; 354, positioning block; 355, spring pull rod; 356, cross bar; 357, wire rope; 36, clamping block; 4, height-adjustable slide; 41, base plate; 42, placement table; 43, cross-lifting structure; 431, adjusting screw; 432, sliding cross frame; 433, U-shaped slot. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] The following is combined with Figures 1-12 The present invention is further described in detail Example 1:

[0017] An embodiment of the present invention provides a bridge anti-fall beam lifting device, including a universal movable base 1, a lifting platform 2 is installed on the surface of the universal movable base 1, the lifting platform 2 specifically includes a telescopic cylinder and telescopic rods arranged at the four corners, the height is adjusted by the telescopic cylinder, and is used to keep it in the same plane with the pier body table surface so as to move the anti-fall beam to the pier body table surface, a height-adjustable slide 4 is provided on the surface of the lifting platform 2, for placing the anti-fall beam, facilitating the movement and installation of the anti-fall beam, when installing the anti-fall beam, the anti-fall beam can be moved together with the height-adjustable slide 4 to the pier body table surface, and a rotatable lifting and pushing mechanism 3 is provided on one side of the lifting platform 2, for hoisting the anti-fall beam and pushing the anti-fall beam to move.

[0018] Specifically, the lifting and pushing mechanism 3 includes a turntable installed on the surface of the universal movable base 1. The turntable can facilitate the overall rotation of the lifting and pushing mechanism 3 to hoist the anti-fall beams placed at different positions. A multi-section telescopic cylinder 31 is fixed on the top of the turntable. The stroke is long and the height is low when retracted. A slide 32 is installed on the top of the multi-section telescopic cylinder 31. The slide 32 is internally slidably connected with a telescopic and rotating structure 33. One end of the telescopic and rotating structure 33 is connected with a hook 34 for hanging the anti-fall beam that needs to be hoisted. Before the anti-fall beam is hoisted, it needs to be tied with a rope to facilitate hoisting through the hook 34. The surface of the hook 34 has an anti-slip clip to prevent it from falling off during hoisting. At the same time, it plays a protective role to prevent people from being injured when the hook 34 rotates.

[0019] The telescopic and rotating structure 33 includes a housing 331. The interior of the housing 331 is divided into a telescopic chamber and a spring chamber. A threaded rod 332 is rotatably connected to the interior of the telescopic chamber. A threaded sleeve 333 is sleeved on the outer surface of the threaded rod 332. One end of the threaded sleeve 333 extends through the housing 331 to the outside and connects to the hook 34 and the block 36. A cover plate 3312 is provided on the top of the housing 331. A drive motor 3313 is fixed to the surface of the cover plate 3312. The drive motor 3313 is connected to the threaded rod 332 via a gear assembly. The gear assembly includes a driving gear and a driven gear. The drive motor 3313 drives the driving gear to rotate, which in turn drives the driven gear to rotate, thereby driving the driven gear to rotate the threaded rod 332.

[0020] A quick positioning mechanism 35 is provided between the slide 32 and the telescopic and rotating structure 33, and the quick positioning mechanism 35 is used to fix the position of the telescopic and rotating structure 33 inside the slide 32; after the lifting is completed, the telescopic and rotating structure 33 can be transformed into a device for pushing the height-adjustable slide 4 to move, so as to facilitate pushing the anti-fall beam to the table surface of the pier body. At the same time, the multi-section telescopic cylinder 31 is also lowered to the lowest level, which can facilitate entering between the bridge beam body and the pier body. During lifting, the position where the telescopic and rotating structure 33 is set is not suitable for pushing the height-adjustable slide 4 to move, so it is necessary to pull the telescopic and rotating structure 33 backward to change its position.

[0021] Specifically, the quick positioning mechanism 35 includes a retractable positioner and a pull rope disassembly assembly arranged on both sides of the shell 331. The two symmetrical side walls of the slide 32 are respectively provided with a first positioning hole 351 and a second positioning hole 352 at both ends. The retractable positioner includes a fixed shell 353 embedded in the side wall of the shell 331. The interior of the fixed shell 353 is provided with a first spring. A positioning block 354 is fixed to one end of the first spring. The positioning block 354 is engaged with the first positioning hole 351 or the second positioning hole 352. When the lifting device needs to be lifted, the positioning block 354 is engaged with the second positioning hole 352, and the device is in a state as shown in FIG. Figure 1In the state shown, when the anti-fall beam needs to be pushed to move to the step of the pier body, the positioning block 354 is engaged with the first positioning hole 351, and the device is in the state shown. Figure 2 Status shown.

[0022] The pull rope disassembly assembly includes two spring pull rods 355 arranged inside the spring cavity. One end of the two spring pull rods 355 extends to the outside of the housing 331 and is connected to a cross bar 356. The other end of the spring pull rod 355 is connected to a steel wire rope 357. The end of the steel wire rope 357 away from the spring pull rod 355 is connected to the positioning block 354. Figure 8 As shown, the spring pull rod 355 includes a rod body, a second spring and a plug. The plug is located at one end of the rod body, and the second spring is sleeved on the surface of the rod body. When in use, pulling the cross bar 356 outward can drive the wire rope 357 to move, thereby causing the positioning block 354 to disengage from the first positioning hole 351 or the second positioning hole 352.

[0023] Example 2:

[0024] The above-mentioned embodiment 1 solves the problem that the anti-fall beam is inconvenient to lift and requires the effort of multiple people to push the anti-fall beam onto the pier body step. In order not to increase friction and resistance, generally after the anti-fall beam is moved to the pier body table, there is still a certain distance between the anti-fall beam and the installation surface on its top where it needs to be installed. It is necessary to add a pad at the bottom of the anti-fall beam to facilitate the installation of the anti-fall beam. However, adding the pad requires lifting the anti-fall beam a certain distance, which is more laborious. Therefore, further design was carried out on the basis of embodiment 1.

[0025] The height-adjustable slide 4 includes a base plate 41, a pulley is provided at the bottom of the base plate 41, a sliding limit track is provided on the surface of the lifting platform 2, a placement platform 42 is provided above the base plate 41, and a cross-lifting structure 43 is provided on the surface of the placement platform 42. A clamping block 36 is fixed at one end of the telescopic and rotating structure 33, and the clamping block 36 matches one end of the cross-lifting structure 43.

[0026] Specifically, the cross-lifting structure 43 includes an adjusting screw 431 and a sliding cross frame 432. One end of the adjusting screw 431 extends out of one end of the side wall of the base plate 41 and is fixed with a U-shaped slot 433. The U-shaped slot 433 matches the block 36. Therefore, when the block 36 drives the U-shaped slot 433 to rotate, it can drive the adjusting screw 431 to rotate, so that the adjusting screw 431 drives the sliding cross frame 432 to change the angle, thereby realizing height adjustment, so that the top of the anti-fall beam can contact the installation surface.

[0027] The interior of the telescopic cavity is fixed with a fixing plate 334, the surface of the fixing plate 334 is connected with a fixing ring 335, the threaded rod 332 passes through the openings in the middle of the fixing plate 334 and the fixing ring 335, the outer surface of the threaded rod 332 is rotatably connected with a positioning plate 336, one side of the positioning plate 336 and the outer sleeve of the threaded rod 332 is provided with a positioning sleeve 337, a fixed switching assembly 338 is provided between the positioning sleeve 337 and the fixing ring 335, and the fixed switching assembly 338 includes a telescopic fixture 3381 and a rotating fixture 3382, the telescopic fixture 3381 is used to relatively fix the positions of the fixing ring 335 and the positioning sleeve 337, and the rotating fixture 3382 is used to relatively fix the threaded rod 332 and the positioning sleeve The position of the sleeve 337 is relatively fixed, the telescopic fixer 3381 and the rotation fixer 3382 can be a locking bolt, and a gasket with anti-slip teeth is provided at one end of the locking bolt to ensure the stability of the fixation, which is used for tightening and fixing. It can also be other fixing devices, such as a spring rod with anti-slip teeth, which is used for tightening and fixing, mainly to be able to fix it. The inner wall of the telescopic cavity is connected to the end away from the fixed switching component 338 with a rotating ring 339, and guide rods 3310 are respectively provided on both sides of the threaded sleeve 333. The two ends of the guide rod 3310 are respectively connected to the rotating ring 339 and the positioning plate 336, and the outer surface of the guide rod 3310 is provided with a sliding sleeve 3311, which is fixed to the threaded sleeve 333.

[0028] The structural design enables the telescopic and rotating structure 33 to be able to telescope and rotate after switching. Its telescopic function is used to assist in lifting and pushing the height-adjustable slide 4 to move, and its rotation function is used to assist in lifting and lowering the height-adjustable slide 4. Figure 3 、 Figure 6 and Figure 7 As shown, when rotation is required, the rotating fixture 3382 is pressed against the threaded rod 332, and the telescopic fixture 3381 is loosened. At this time, when the threaded rod 332 rotates, it can drive the positioning sleeve 337, guide rod 3310 and threaded sleeve 333 connected thereto to rotate, that is, the threaded rod 332 and the threaded sleeve 333 become a whole and rotate at the same time. On the contrary, when extension and retraction are required, the telescopic fixture 3381 is pressed against the threaded rod 332, and the rotating fixture 3382 is loosened. Since the fixing plate 334 is fixed to the shell 331, the positioning sleeve 337, guide rod 3310 and threaded sleeve 333 will not rotate as a whole. Since the threaded sleeve 333 is slidably connected to the guide rod 3310, when the threaded rod 332 rotates, the threaded sleeve 333 moves on the surface of the threaded rod 332 to achieve extension and retraction. The structure is simple and the operation is convenient.

[0029] Example 3:

[0030] like Figure 10-12 A bridge anti-falling beam lifting method includes the following specific steps: S1. First, adjust the lifting platform 2 to the same height as the pier platform, and move the device to the outside of the bridge beam so that the device is not blocked by the top. When the device is not blocked by the top beam, the lifting and pushing mechanism 3 lifts the anti-fall beam tied with the lifting rope and places it on the surface of the height-adjustable slide 4. S2. After the hoisting is completed, the quick positioning mechanism 35 is pulled to move the telescopic and rotating structure 33 backward and position it, and the multi-section telescopic cylinder 31 is recovered so that the clamping block 36 can be lowered into the U-shaped clamping groove 433 (as shown in FIG. Figure 10-11 ), which shortens the overall height of the device, allowing the device to be pushed into the space between the pier body and the beam body, while also making secondary use of the lifting and pushing mechanism 3, enabling it to push the height-adjustable slide 4 with the anti-fall beam placed onto the table surface of the pier body; S3. After the height-adjustable slide 4 with the anti-fall beam is pushed onto the table surface of the pier body, the fixed switching assembly 338 is switched, that is, the telescopic fixture 3381 is loosened and the rotation fixture 3382 is tightened to change the telescopic and rotating structure 33 from telescopic to rotation, thereby driving the adjusting screw 431 to rotate and adjust the height of the height-adjustable slide 4 so that the top of the anti-fall beam is close to the plane to be installed (such as Figure 12 ), which makes the installation of anti-fall beams more labor-saving and greatly improves work efficiency.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A bridge beam lifting device for preventing falling beams, comprising a universal movable base (1), characterized in that: A lifting platform (2) is installed on the surface of the universal movable base (1) for maintaining the same plane as the pier body table surface; a height-adjustable sliding platform (4) is provided on the surface of the lifting platform (2) for placing the anti-fall beam to facilitate the movement and installation of the anti-fall beam; a rotatable lifting and pushing mechanism (3) is provided on one side of the lifting platform (2) for lifting the anti-fall beam and pushing the anti-fall beam to move; The lifting and pushing mechanism (3) includes a turntable mounted on the surface of a universal movable base (1), a multi-section telescopic cylinder (31) is fixed on the top of the turntable, a slide (32) is mounted on the top of the multi-section telescopic cylinder (31), a telescopic and rotating structure (33) is slidably connected inside the slide (32), one end of the telescopic and rotating structure (33) is connected to a hook (34), a quick positioning mechanism (35) is provided between the slide (32) and the telescopic and rotating structure (33), and the quick positioning mechanism (35) is used to fix the position of the telescopic and rotating structure (33) inside the slide (32); The height-adjustable slide (4) includes a base plate (41), a pulley is provided at the bottom of the base plate (41), a sliding limit track is provided on the surface of the lifting platform (2), a placement platform (42) is provided above the base plate (41), a cross-lifting structure (43) is provided on the surface of the placement platform (42), and a clamping block (36) is fixed to one end of the telescopic and rotating structure (33), and the clamping block (36) matches one end of the cross-lifting structure (43).

2. A bridge beam anti-falling lifting device according to claim 1, characterized in that: The telescopic and rotating structure (33) comprises a housing (331), the interior of the housing (331) being divided into a telescopic chamber and a spring chamber, the interior of the telescopic chamber being rotatably connected to a threaded rod (332), the outer surface of the threaded rod (332) being sleeved with a threaded sleeve (333), one end of the threaded sleeve (333) passing through the housing (331) and extending to the outside to be connected to a hook (34) and a clamping block (36).

3. The bridge anti-falling beam lifting device according to claim 2, characterized in that: A fixing plate (334) is fixed inside the telescopic cavity, and a fixing ring (335) is connected to the surface of the fixing plate (334). The threaded rod (332) passes through the openings in the middle of the fixing plate (334) and the fixing ring (335). The outer surface of the threaded rod (332) is rotatably connected to a positioning plate (336). A positioning sleeve (337) is provided on one side of the positioning plate (336) and is located outside the threaded rod (332). A fixed switching assembly (338) is provided between the positioning sleeve (337) and the fixing ring (335).

4. The bridge anti-falling beam lifting device according to claim 3 is characterized in that: An end of the inner wall of the telescopic cavity away from the fixed switching assembly (338) is connected to a rotating ring (339), and guide rods (3310) are respectively provided on both sides of the threaded sleeve (333), and the two ends of the guide rod (3310) are respectively connected to the rotating ring (339) and the positioning plate (336), and a sliding sleeve (3311) is provided on the outer surface of the guide rod (3310), and the sliding sleeve (3311) is fixed to the threaded sleeve (333).

5. The bridge beam anti-falling lifting device according to claim 4 is characterized in that: The fixed switching assembly (338) includes a telescopic fixer (3381) and a rotary fixer (3382), wherein the telescopic fixer (3381) is used to relatively fix the positions of the fixing ring (335) and the positioning sleeve (337), and the rotary fixer (3382) is used to relatively fix the positions of the threaded rod (332) and the positioning sleeve (337).

6. The bridge anti-falling beam lifting device according to claim 2, characterized in that: The quick positioning mechanism (35) includes a retractable positioner and a pull rope disassembly assembly arranged on both sides of the housing (331), and a first positioning hole (351) and a second positioning hole (352) are respectively formed at both ends of the two symmetrical side walls of the slide seat (32); The retractable positioner comprises a fixed shell (353) embedded in the side wall of the housing (331), a first spring is provided inside the fixed shell (353), a positioning block (354) is fixed to one end of the first spring, and the positioning block (354) is engaged with the first positioning hole (351) or the second positioning hole (352); The pull rope disassembly assembly includes two spring pull rods (355) arranged inside the spring cavity, one end of the two spring pull rods (355) extends to the outside of the housing (331) and is commonly connected to a cross bar (356), the other end of the spring pull rod (355) is connected to a steel wire rope (357), and the end of the steel wire rope (357) away from the spring pull rod (355) is connected to a positioning block (354).

7. The bridge beam anti-falling lifting device according to claim 1, characterized in that: The cross-lifting structure (43) comprises an adjusting screw (431) and a sliding cross frame (432), one end of the adjusting screw (431) extends out of one end of the side wall of the bottom plate (41) and is fixed with a U-shaped slot (433), and the U-shaped slot (433) matches the block (36).

8. The bridge beam anti-falling lifting device according to claim 2, characterized in that: A cover plate (3312) is provided on the top of the housing (331), a driving motor (3313) is fixed to the surface of the cover plate (3312), and the driving motor (3313) is connected to the threaded rod (332) via a gear assembly.

9. A bridge beam lifting method to prevent falling beams, characterized by: The invention comprises the bridge beam anti-falling lifting device according to any one of claims 1 to 8.

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