Bridge lifting device for narrow spaces

Abstract

The application discloses a bridge hoisting device for narrow space and belongs to the technical field of hoisting equipment. The bridge hoisting device comprises a vehicle frame, a telescopic hoisting arm assembly arranged above the vehicle frame, a first traction assembly and a second traction assembly. The first traction assembly comprises a first winch and a first steel wire rope, and the second traction assembly comprises a second winch and a second steel wire rope. The first winch and the second winch are fixed on the vehicle frame. The first steel wire rope and the second steel wire rope are connected with the telescopic hoisting arm assembly through a pulley assembly and are used for vertical hoisting. The ends of the first steel wire rope and the second steel wire rope are connected with a placing plate. An adjusting pulley assembly is arranged on the placing plate. The second steel wire rope realizes horizontal traction through the adjusting pulley assembly. The bridge hoisting device can adapt to the hoisting requirements of narrow space, horizontally pulls out the bailey beam from the bridge bottom for hoisting, and greatly improves the hoisting efficiency.

Description

Technical Field

[0001] This invention belongs to the field of hoisting equipment technology, and in particular relates to a bridge hoisting device for use in confined spaces. Background Technology

[0002] During cast-in-place bridge construction, scaffolding is required beneath the concrete formwork for support. Various types of scaffolding exist, with Bailey bridges being a mainstream option. A Bailey bridge is a truss beam assembled from several individual Bailey frame units. The Bailey frames are typically connected by bolts using windows as connecting components. Bailey bridges are widely used in the construction industry due to their convenient installation and high overall rigidity and strength. Before pouring, multiple sets of Bailey bridges are hoisted onto the I-beams erected on the bridge piers using a crane and secured. Formwork supports and pouring formwork are then fixed on top of the Bailey bridges. During pouring, the Bailey bridges transfer the weight from above to the I-beams, columns, or support frames below, ensuring the stability of the poured concrete. After pouring, the concrete is allowed to harden before the formwork and formwork supports are removed.

[0003] like Figure 1 As shown, there is a disc-lock frame under the bridge flange, a Bailey bridge under the disc-lock frame, and steel pipe piles under the Bailey bridge. When it needs to be dismantled, the disc-lock frame must first be dismantled and hoisted to the ground, then the Bailey bridge must be hoisted to the ground, and finally the steel pipe piles must be removed.

[0004] Because the modular scaffolding is located below the bridge flange, dismantling requires manual removal followed by hoisting to the ground using a truck crane. However, the bridge flange obstructs the crane's reach, making it difficult for the crane hook to extend onto the scaffolding. Similarly, the concrete bridge structure above the Bailey bridge beams obscures the top space, limiting the hoisting area and preventing the crane hook from directly lifting the Bailey beams vertically. Traditional dismantling of Bailey bridge supports for cast-in-place box girders typically involves manual labor combined with a truck crane. The Bailey beams are first dragged laterally to below the flange of the cast-in-place box girder, and then hoisted to the ground by the truck crane. This complex process requires multiple truck cranes and is inefficient.

[0005] Chinese Patent CN218090538U discloses a lifting device for a cast-in-place box girder Bailey beam support. The device includes multiple hangers, each with a hook capable of lifting and lowering. Each hanger is placed on the upper surface of the box girder Bailey section and arranged in a row. Multiple pre-drilled holes are provided on the upper surface of the box girder Bailey section along the horizontal direction. Each pre-drilled hole penetrates the entire box girder vertically, and the multiple pre-drilled holes are aligned in a straight line on the upper surface of the Bailey section. Each hanger can pass through the pre-drilled holes on the Bailey section vertically and extend into the Bailey beam support at the bottom of the box girder, thereby hooking the Bailey beam support with hooks on steel wire ropes.

[0006] The above-mentioned scheme uses pre-drilled holes and hangers on the Bailey bridge panels to hoist the Bailey beam supports below. However, since the positions of the pre-drilled holes are fixed, the Bailey beam supports can only move up and down. Moving the Bailey beam supports out from under the bridge requires manual pushing. In addition, after hoisting one set of Bailey beam supports, the hangers need to be rearranged for the next set of hoisting operations, making the hoisting process quite troublesome. Furthermore, the large number of pre-drilled holes will affect the overall strength of the bridge, and the pre-drilled holes in the above-mentioned scheme cannot be used to hoist the disc-lock frame at the bridge flange plate position.

[0007] Moving a truck crane onto the bridge and hoisting it from top to bottom presents the problem of making it difficult to move the Bailey beams horizontally out from under the bridge.

[0008] Therefore, a set of lifting devices suitable for confined spaces is needed to facilitate the lifting of disc-lock scaffolds and Bailey beams, thereby improving lifting efficiency. Summary of the Invention

[0009] The purpose of this invention is to provide a bridge lifting device for use in confined spaces, so as to solve the problems existing in the prior art.

[0010] The objective of this invention is achieved through the following technical solution:

[0011] A bridge lifting device for confined spaces includes a frame and a telescopic boom assembly, a first traction assembly, and a second traction assembly located above the frame;

[0012] The first traction assembly includes a first winch and a first wire rope, and the second traction assembly includes a second winch and a second wire rope. The first winch and the second winch are fixed on the frame, and the first wire rope and the second wire rope are connected to the telescopic boom assembly through a pulley assembly and are used for vertical lifting.

[0013] The first and second wire ropes are connected to a placement plate at their ends. The placement plate is equipped with an adjusting pulley assembly, through which the second wire rope is horizontally tractioned.

[0014] Furthermore, the adjusting pulley assembly includes a mounting frame and an upper pulley and a lower pulley arranged vertically within the mounting frame. The upper pulley and the lower pulley rotate freely, and the upper pulley is connected to the top of the mounting frame via an adjusting screw.

[0015] Furthermore, two sets of first branch wire ropes are provided between the first wire rope and the placement plate. One end of each set of first branch wire ropes is connected to the end of the first wire rope through a ring, and the other end of each set of first branch wire ropes is connected to the two ends of the placement plate away from the bridge through hooks.

[0016] Furthermore, two sets of second branch wire ropes are provided between the second wire rope and the placement plate. One end of each set of second branch wire ropes is connected to the end of the second wire rope through a ring, and the other end of each set of second branch wire ropes is detachably connected to the two ends of the placement plate near the bridge side through hooks.

[0017] Furthermore, a first lifting ring is provided at the position where the second branch wire rope connects to the placement plate. The first lifting ring is located on the side of the placement plate closer to the bridge. The placement plate is provided with a groove corresponding to the position of the first lifting ring, and the first lifting ring is located in the groove.

[0018] Furthermore, the placement plate is provided with second lifting rings on both sides along the bridge direction.

[0019] Furthermore, the bottom of the placement plate near the bridge side is provided with a pin assembly, and the placement plate is detachably connected to the bridge support assembly through the pin assembly.

[0020] Furthermore, the upper pulley and the lower pulley are provided with grooves adapted to the second wire rope.

[0021] Furthermore, the vehicle frame is a towing structure, and the vehicle frame is equipped with a hydraulic support assembly.

[0022] Furthermore, the vehicle frame is equipped with a control host, which is electrically connected to the telescopic boom assembly, the first traction assembly, and the second traction assembly.

[0023] The beneficial effects of this invention are:

[0024] 1) Manually dismantled disc-lock frames can be stacked on a placement plate and lowered to the ground by the first and second traction components. Multiple disc-lock frame parts can be hoisted at once, improving hoisting efficiency.

[0025] 2) The second wire rope forms a horizontal traction through the adjustment pulley assembly. The Bailey beam located under the bridge is pulled horizontally to the placement plate through the second wire rope, and then hoisted downwards. It can adapt to the hoisting requirements of narrow spaces, and pull the Bailey beam out from under the bridge for hoisting, which greatly improves the hoisting efficiency.

[0026] 3) The dismantling and hoisting of Bailey beams on one side can be completed with a single hoisting device. Hoisting devices can be set up on both sides to achieve synchronous operation and improve dismantling and assembly efficiency. This eliminates the need for multiple truck cranes to work together, thus reducing hoisting costs. Attached Figure Description

[0027] Figure 1 This is a side view of a bridge lifting device for use in confined spaces according to the present invention;

[0028] Figure 2This is a front view of a bridge lifting device for use in confined spaces according to the present invention;

[0029] Figure 3 This is a top view of a bridge lifting device for confined spaces according to the present invention;

[0030] Figure 4 This is a schematic diagram illustrating the process of horizontally pulling the Bailey beam out of the bottom of the bridge using a second steel wire rope in this invention.

[0031] Figure 5 This is a front view of the adjusting pulley assembly in this invention;

[0032] Figure 6 This is a schematic diagram illustrating the operation of horizontally pulling the Bailey beam onto the placement plate using a second steel wire rope in this invention.

[0033] Figure 7 This is a schematic diagram illustrating the process of lowering the Bailey beam from the placement plate using the first and second steel wire ropes in this invention.

[0034] Figure 8 This is a schematic diagram illustrating the process of lowering multiple Bailey beams from a placement plate using a first and a second wire rope in this invention.

[0035] In the diagram, 1-frame, 2-telescopic boom assembly, 31-first wire rope, 32-second wire rope, 33-first branch wire rope, 34-second branch wire rope, 35-first winch, 36-second winch, 4-placement plate, 41-first lifting ring, 42-second lifting ring, 43-pin assembly, 5-adjusting pulley assembly, 51-mounting frame, 52-upper pulley, 53-lower pulley, 54-adjusting screw, 61-disc buckle frame, 62-Bailey beam, 63-support beam, 64-steel pipe pile. Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] See Figures 1-3 The present invention provides a technical solution:

[0038] like Figures 1-3 As shown, a bridge lifting device for confined spaces includes a frame 1 and a telescopic boom assembly 2, a first traction assembly, and a second traction assembly located above the frame 1.

[0039] The first traction assembly includes a first winch 35 and a first wire rope 31, and the second traction assembly includes a second winch 36 and a second wire rope 32. The first winch 35 and the second winch 36 are fixed on the frame 1. The first wire rope 31 and the second wire rope 32 are connected to the telescopic boom assembly 2 through a pulley assembly and are used for vertical lifting.

[0040] The ends of the first wire rope 31 and the second wire rope 32 are connected to a placement plate 4, and the placement plate 4 is provided with an adjusting pulley assembly 5. The second wire rope 32 is horizontally pulled through the adjusting pulley assembly 5.

[0041] With the above technical solution, the chassis 1 is positioned above the poured bridge. The placement plate 4 extends beyond the bridge via the telescopic boom assembly 2, the first traction assembly, and the second traction assembly. Manually dismantled disc-lock frames 61 can be stacked on the placement plate 4 and lowered to the ground using the first and second traction assemblies. A second steel wire rope 32, through an adjusting pulley assembly 5, forms a horizontal traction, horizontally pulling the Bailey beam 62 located under the bridge onto the placement plate 4 before being lowered. This structure allows for rapid hoisting of the disc-lock frames 61 and Bailey beams 62 in confined spaces, avoiding the bridge's influence on the hoisting process and greatly improving hoisting efficiency.

[0042] Furthermore, such as Figure 4 and Figure 5 As shown, the adjusting pulley assembly 5 includes a mounting frame 51 and an upper pulley 52 and a lower pulley 53 arranged vertically within the mounting frame 51. The upper pulley 52 and the lower pulley 53 rotate freely, and the upper pulley 52 is connected to the top of the mounting frame 51 via an adjusting screw 54.

[0043] Through the above technical solution, the adjusting screw 54 passes through the upper part of the mounting frame 51. Nuts are provided on both the upper and lower sides of the mounting frame 51 corresponding to the adjusting screw 54. The position of the upper pulley 52 is adjusted by turning the nuts, thereby adjusting the gap between the upper pulley 52 and the lower pulley 53. When the second wire rope 32 passes between the upper pulley 52 and the lower pulley 53, the gap is adjusted to prevent the second wire rope 32 from coming off between the upper pulley 52 and the lower pulley 53, thus ensuring the traction direction of the second wire rope 32.

[0044] Furthermore, the upper pulley 52 and the lower pulley 53 are provided with grooves adapted to the second wire rope 32. These grooves engage the second wire rope 32, preventing it from coming off. Similarly, the pulleys on the telescopic boom assembly 2 are also provided with corresponding grooves to ensure that the first wire rope 31 and the second wire rope 32 do not come off.

[0045] Furthermore, two sets of first branch wire ropes 33 are provided between the first wire rope 31 and the placement plate 4. One end of each set of first branch wire ropes 33 is connected to the end of the first wire rope 31 via a ring, and the other end of each set of first branch wire ropes 33 is connected to the two ends of the placement plate 4 furthest from the bridge via hooks. Two sets of second branch wire ropes 34 are provided between the second wire rope 32 and the placement plate 4. One end of each set of second branch wire ropes 34 is connected to the end of the second wire rope 32 via a ring, and the other end of each set of second branch wire ropes 34 is detachably connected to the two ends of the placement plate 4 closest to the bridge via hooks.

[0046] With the above technical solution, since there is only one set of telescopic boom assembly 2, the two sides of the placement plate 4 are connected by setting two sets of first branch wire ropes 33 below the first wire rope 31 and two sets of second branch wire ropes 34 below the second wire rope 32, so as to ensure the horizontality of the placement plate 4 and facilitate the subsequent hoisting of Bailey beams 62, etc.

[0047] Furthermore, the bottom of the placement plate 4 near the bridge side is provided with a pin assembly 43, and the placement plate 4 is detachably connected to the bridge support assembly through the pin assembly 43.

[0048] With the above technical solution, when the placement plate 4 is lowered, the front end of the placement plate 4 can be temporarily connected to the support beam 63 via the pin assembly 43. After the connection via the pin assembly 43, the placement plate 4 will not shift or sway. At the same time, after the placement plate 4 is connected to the support beam 63, it is convenient to pull the Bailey beam 62 onto the placement plate 4 via the second steel wire rope 32. The pin assembly 43 plays a docking role. After the Bailey beam 62 is lowered onto the placement plate 4, the pin assembly 43 can be removed, and then subsequent hoisting can be carried out.

[0049] Furthermore, a first lifting ring 41 is provided at the position where the second branch wire rope 34 connects to the placement plate 4. The first lifting ring 41 is located on the side of the placement plate 4 closer to the bridge. The placement plate 4 is provided with a groove corresponding to the position of the first lifting ring 41, and the first lifting ring 41 is located in the groove.

[0050] Through the above technical solution, since the front end of the placement plate 4 needs to be temporarily connected to the bridge support components such as the support beam 63, in order to avoid the collision between the first lifting ring 41 and the support beam 63, the first lifting ring 41 is installed in the groove at the front end of the placement plate 4, which facilitates the installation and removal of the hook at the end of the second branch wire rope 34.

[0051] Furthermore, the placement plate 4 is provided with second lifting rings 42 on both sides along the bridge direction. The second lifting rings 42 are used to fix the disc buckle frame 61 parts and Bailey beam 62 located on the placement plate 4. The Bailey beam 62 and other components are fixed by passing steel wire ropes around the Bailey beam 62 and other components and tightening them with the second lifting rings 42 at both ends, so as to prevent the Bailey beam 62 from falling off the placement plate 4 during the hoisting process.

[0052] Furthermore, the frame 1 is a towing structure, and the frame 1 is equipped with a hydraulic support assembly. Because it is a towing structure, it can be towed by other small vehicles, indicating that the frame 1 can also be a self-driving structure such as a truck crane. The hydraulic support assembly is used to fix the frame 1, facilitating lifting operations and preventing the frame 1 from tilting to the side; therefore, the frame 1 is equipped with corresponding counterweights.

[0053] Furthermore, the frame 1 is equipped with a control host, which is electrically connected to the telescopic boom assembly 2, the first traction assembly, and the second traction assembly.

[0054] Through the above technical solution, the telescopic boom assembly 2 can be controlled by the host machine, and the first winch 35 and the second winch 36 can be operated synchronously or independently. At the same time, the telescopic boom assembly 2 can be used in conjunction with the first winch 35 and the second winch 36 for hoisting.

[0055] The specific hoisting process is as follows:

[0056] 1. After moving the chassis 1 to the designated position, start the hydraulic support assembly to prepare for the hoisting operation;

[0057] 2. Connect the first branch wire rope 33 and the first wire rope 31, connect the second branch wire rope 34 and the second wire rope 32, then connect the hook at the end of the first branch wire rope 33 to the corresponding lifting ring of the placement plate 4, and connect the hook at the end of the second branch wire rope 34 to the first lifting ring 41. At this time, the placement plate 4 is installed.

[0058] 3. For example Figure 1 As shown, the placement plate 4 is moved to the side of the support beam 63 below the disc buckle frame 61 by the telescopic boom assembly 2, the first traction assembly and the second traction assembly. Then, the placement plate 4 is temporarily connected to the support beam 63 by the pin assembly 43. Then, the second branch steel wire rope 34 is removed from the first lifting ring 41 to free up space in front of the placement plate 4.

[0059] 4. Manually dismantle the disc buckle frame 61, stack the parts of the disc buckle frame 61 on the placement plate 4, then fix the disc buckle frame 61 by passing an additional steel wire rope through the second lifting ring 42, then pass the second branch steel wire rope 34 around the disc buckle frame 61 and connect it to the first lifting ring 41, and remove the pin assembly 43. At this time, the placement plate 4 is slowly lifted down by the first traction assembly and the second traction assembly. At this time, the dismantling and hoisting operation of the disc buckle frame 61 is completed.

[0060] 5. For example Figure 4 As shown, the lowered placement plate 4 is lifted onto the support beam 63 below the Bailey beam 62 by the first traction assembly and the second traction assembly, and the placement plate 4 is connected to the Bailey beam 62 by the pin assembly 43. The worker will first remove the connecting piece between the Bailey beam 62 and the support beam 63 to ensure that the Bailey beam 62 is not restricted. At this time, the worker will manually pull the second wire rope 32 between the upper pulley 52 and the lower pulley 53. The horizontal traction of the second wire rope 32 is achieved by adjusting the pulley assembly 5. The end hooks of the two sets of second branch wire ropes 34 are connected to the two ends of the Bailey beam 62. At this time, the Bailey beam 62 is pulled horizontally by starting the second winch 36.

[0061] 6. For example Figure 6 As shown, Bailey beam 62 is pulled onto placement plate 4, and simultaneously... Figure 8 As shown, when the size of Bailey beam 62 is small or the size of the placement plate 4 is large, multiple sets of Bailey beam 62 can be moved onto the placement plate 4 at one time, improving the efficiency of Bailey beam 62 assembly and disassembly. After the Bailey beam 62 is moved, the second steel wire rope is manually removed from the adjusting pulley assembly.

[0062] 7. For example Figure 7 As shown, the Bailey beam 62 is fixed by passing an additional steel wire rope through the second lifting ring 42. Then, the second branch steel wire rope 34 is wrapped around the Bailey beam 62 and connected to the first lifting ring 41. The pin assembly 43 is then removed. At this time, the placement plate 4 is slowly lowered by the first traction assembly and the second traction assembly, thus completing the dismantling and hoisting operation of the Bailey beam 62.

[0063] Traditional hoisting and dismantling processes require manual intervention, with workers secured by safety ropes. This involves disassembling connecting components of structures such as the disc-lock scaffold and Bailey bridge, and manually attaching the hooks to the truck crane. Furthermore, traditional hoisting requires manual pushing of the Bailey bridge from the bridge floor to the edge for crane operation. This device reduces manual intervention and improves safety. Simply disassembling the connecting components and adjusting the second wire rope within the adjusting pulley assembly allows for the horizontal movement of the Bailey bridge. After horizontal movement, the second wire rope is manually removed and attached to the first lifting ring to complete the hoisting operation.

[0064] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A bridge lifting device for use in confined spaces, characterized in that: Includes a frame (1) and a telescopic boom assembly (2) located above the frame (1), a first traction assembly and a second traction assembly; The first traction assembly includes a first winch (35) and a first wire rope (31), and the second traction assembly includes a second winch (36) and a second wire rope (32). The first winch (35) and the second winch (36) are fixed on the frame (1). The first wire rope (31) and the second wire rope (32) are connected to the telescopic boom assembly (2) through a pulley assembly and are used for vertical lifting. The first wire rope (31) and the second wire rope (32) are connected to a placement plate (4) at their ends. The placement plate (4) is provided with an adjusting pulley assembly (5). The second wire rope (32) is horizontally pulled through the adjusting pulley assembly (5). The placement plate (4) has a pin assembly (43) at its bottom near the bridge side, and the placement plate (4) is detachably connected to the bridge support assembly through the pin assembly (43).

2. The bridge lifting device for confined spaces according to claim 1, characterized in that: The adjusting pulley assembly (5) includes a mounting frame (51) and an upper pulley (52) and a lower pulley (53) arranged vertically within the mounting frame (51). The upper pulley (52) and the lower pulley (53) rotate freely. The upper pulley (52) is connected to the top of the mounting frame (51) via an adjusting screw (54).

3. The bridge lifting device for confined spaces according to claim 1, characterized in that: Two sets of first branch wire ropes (33) are provided between the first wire rope (31) and the placement plate (4). One end of the two sets of first branch wire ropes (33) is connected to the end of the first wire rope (31) through a ring, and the other end of the two sets of first branch wire ropes (33) is connected to the two ends of the placement plate (4) away from the bridge through hooks.

4. The bridge lifting device for confined spaces according to claim 1, characterized in that: Two sets of second branch wire ropes (34) are provided between the second wire rope (32) and the placement plate (4). One end of the two sets of second branch wire ropes (34) is connected to the end of the second wire rope (32) through a ring. The other end of the two sets of second branch wire ropes (34) is detachably connected to the two ends of the placement plate (4) near the bridge side through hooks.

5. The bridge lifting device for confined spaces according to claim 4, characterized in that: The second branch wire rope (34) is connected to the placement plate (4) with a first lifting ring (41). The first lifting ring (41) is located on the side of the placement plate (4) close to the bridge. The placement plate (4) is provided with a groove corresponding to the position of the first lifting ring (41). The first lifting ring (41) is located in the groove.

6. The bridge lifting device for confined spaces according to claim 1, characterized in that: The placement plate (4) is provided with second lifting rings (42) on both sides along the bridge direction.

7. The bridge lifting device for confined spaces according to claim 1, characterized in that: The upper pulley (52) and lower pulley (53) are provided with grooves that are adapted to the second wire rope (32).

8. The bridge lifting device for confined spaces according to claim 1, characterized in that: The frame (1) is a traction structure, and the frame (1) is equipped with a hydraulic support assembly.

9. The bridge lifting device for confined spaces according to claim 1, characterized in that: The frame (1) is equipped with a control host, which is electrically connected to the telescopic boom assembly (2), the first traction assembly, and the second traction assembly.

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