Bridge expansion joint lifting device

Abstract

The utility model relates to a lifting device, in particular to a bridge expansion joint lifting device which comprises a lifting support, two or more parallel suspension mechanisms used for lifting and lifting a bridge expansion joint are arranged on the lifting support, and each suspension mechanism comprises a lifting assembly and a bridge expansion joint connecting assembly. The top of the lifting assembly is connected with the lifting support, and the bottom of the lifting assembly is connected with the bridge expansion joint through the bridge expansion joint connecting assembly. According to the utility model, the two or more lifting assemblies for lifting the bridge expansion joint are arranged on the lifting bracket, the plurality of lifting assemblies are correspondingly provided with the plurality of bridge expansion joint connecting assemblies, and the plurality of bridge expansion joint connecting assemblies can form a plurality of acting points on the longer bridge expansion joint, so that the contact area is increased; the bridge expansion joint is structurally and stably hoisted, and the problem that the bridge expansion joint inclines laterally and even falls down is solved.

Description

Technical Field

[0001] The utility model relates to a lifting device, in particular to a lifting device for a bridge expansion joint. Background Art

[0002] In order to meet the requirements of bridge deck deformation, bridge expansion joints are usually set between the two beam ends, between the beam ends and the abutments, or at the hinged position of the bridge. Bridge expansion joints refer to components used to connect the two parts of the bridge structure. They have a certain degree of elasticity and can adapt to the expansion and contraction deformation of the bridge structure. The function of bridge expansion joints is to adjust the displacement and connection between the superstructures caused by vehicle loads and bridge construction materials. When installing bridge expansion joints and replacing them when damaged, lifting devices are required.

[0003] For existing bridge expansion joint lifting devices, please refer to Figure 3 For example, patent CN 215479279 U discloses a special hoisting device for a large displacement telescopic device, which includes two columns, the two columns form a gate-shaped structure, an electric guide rail device body is provided between the two columns, and a separate hoisting device body is provided below the electric guide rail device body. The hoisting device body includes two L-shaped clamps, and a winding roller and a steel wire rope are provided between the L-shaped clamps. When in use, the bridge expansion joint to be lifted is placed between the two L-shaped clamps, the winding roller is rotated, the steel wire rope is wound on the winding roller, and the L-shaped clamp is pulled to clamp the bridge expansion joint.

[0004] Existing lifting devices rely on separate suspension mechanisms to lift bridge expansion joints, and prevent them from falling by strengthening the rigidity of the bridge expansion joints. For long bridge expansion joints, the contact point between the lifting device and the bridge expansion joint is only a small area relative to the length of the bridge expansion joint. When the lifting device is not properly installed, it is easy to cause the bridge expansion joint to tilt and touch the ground, posing a threat to the safety of the operator. Moreover, when dismantling bridge expansion joints, it is possible that the bridge expansion joints are not properly cleaned up due to the old concrete in the construction groove, resulting in uneven force on the bridge expansion joints, tilting of the bridge expansion joints, and even the fall of the bridge expansion joints due to strain on the suspension mechanism. Utility Model Content

[0005] The purpose of the utility model is to provide a bridge expansion joint lifting device to solve the problem that the existing lifting devices proposed in the above background technology all rely on a separate suspension mechanism to lift the bridge expansion joint, which easily causes unbalanced force on the bridge expansion joint, resulting in the bridge expansion joint tilting or even falling.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A bridge expansion joint lifting device comprises a lifting bracket, on which a suspension mechanism for lifting and hoisting the bridge expansion joint is arranged, wherein two or more suspension mechanisms are arranged in parallel;

[0008] The suspension mechanism includes a lifting component and a bridge expansion joint connection component. The top of the lifting component is connected to the lifting bracket, and the bottom of the lifting component is connected to the bridge expansion joint through the bridge expansion joint connection component.

[0009] Furthermore, the lifting bracket includes a crossbeam, the lifting assembly is a power hoist, the power hoist is arranged on the crossbeam, and the hook pulley of the power hoist is connected to the bridge expansion joint connection assembly.

[0010] Furthermore, the crossbeam is an I-beam, the power hoist is a walking electric hoist or a walking pneumatic hoist, and the walking electric hoist or the walking pneumatic hoist moves axially along the I-beam.

[0011] Furthermore, the suspension mechanism includes two bridge expansion joint connection assemblies, and the two bridge expansion joint connection assemblies are arranged at two opposite ends of the bottom of the lifting assembly.

[0012] Furthermore, the bridge expansion joint connection assembly includes a first traction steel cable and a second traction steel cable, one end of the first traction steel cable and one end of the second traction steel cable are respectively connected to the lifting assembly, the other end of the first traction steel cable and the other end of the second traction steel cable are respectively connected to the bridge expansion joint, and the first traction steel cable and the second traction steel cable form a triangular structure when connected to the bridge expansion joint.

[0013] Furthermore, the bridge expansion joint connection assembly also includes a shackle, and the first traction steel cable and the second traction steel cable are both connected to the lifting assembly through the shackle.

[0014] Furthermore, the bridge expansion joint connection assembly also includes a hook, and the first traction steel cable and the second traction steel cable are both connected to the bridge expansion joint through the hook.

[0015] Furthermore, a wear detection component is arranged on the first traction steel cable and / or the second traction steel cable, and the wear detection component includes a wire rope flaw detector and a wire break warning device. The wire rope flaw detector is mounted on the first traction steel cable or the second traction steel cable, and the wire rope flaw detector is electrically connected to the wire break warning device.

[0016] Furthermore, the lifting bracket also includes a base and a vertical beam, the bottom of the vertical beam is connected to the base, the top of the vertical beam is connected to the cross beam, and the vertical beam and the cross beam form a gate-shaped structure.

[0017] Furthermore, the lifting bracket also includes a purge assembly, which includes an air compressor, a compressed air pipeline and a nozzle. The air compressor is connected to the nozzle through the compressed air pipeline, and the nozzle is arranged at the bridge expansion joint connection assembly.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model arranges two or more suspension mechanisms for lifting bridge expansion joints on a lifting bracket, and the multiple suspension mechanisms are correspondingly provided with multiple lifting assemblies and multiple bridge expansion joint connecting assemblies. The multiple bridge expansion joint connecting assemblies can form at least two or more fulcrums on a bridge expansion joint with a longer length, thereby increasing the contact area, forming a structurally more stable lifting of the bridge expansion joint, and avoiding the problem of the bridge expansion joint tilting or even falling; and, compared with higher-strength rigid fastening of the bridge expansion joint, less damage is caused to the bridge expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the bridge expansion joint connection assembly;

[0022] Figure 3 This is a structural schematic diagram of the existing bridge expansion joint lifting device;

[0023] in,

[0024] 1-Lifting bracket: 101-base, 102-vertical beam, 103-cross beam, 104-travel wheel, 105-travel drive motor;

[0025] 2-Lifting components: 201-power hoist; 202-hook pulley;

[0026] 3-Bridge expansion joint connection components: 301-first traction steel cable, 302-second traction steel cable, 303-shackle, 304-hook, 305-wire rope flaw detector;

[0027] 4-Purge components: 401-compressed air pipeline, 402-nozzle. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model, but the utility model is not limited to the implementation methods described below, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

[0029] Example

[0030] See also Figure 1 and Figure 2 The present embodiment provides a bridge expansion joint lifting device, including a lifting bracket 1. The lifting bracket 1 is provided with a suspension mechanism for lifting the bridge expansion joint. Two or more suspension mechanisms are provided in parallel. The suspension mechanism includes a lifting component 2 and a bridge expansion joint connecting component 3. The top of the lifting component 2 is connected to the lifting bracket 1, and the bottom of the lifting component 2 is connected to the bridge expansion joint through the bridge expansion joint connecting component 3.

[0031] The utility model arranges two or more suspension mechanisms for lifting bridge expansion joints on a lifting bracket 1, and the multiple suspension mechanisms are correspondingly provided with multiple lifting assemblies and multiple bridge expansion joint connecting assemblies. The multiple bridge expansion joint connecting assemblies can form at least two or more fulcrums on a bridge expansion joint with a longer length, thereby increasing the contact area and forming a structurally more stable lifting of the bridge expansion joint, thereby avoiding the problem of the bridge expansion joint tilting or even falling; and, compared with higher-strength rigid fastening of the bridge expansion joint, less damage is caused to the bridge expansion joint.

[0032] Specific:

[0033] The lifting bracket 1 includes a base 101, two vertical beams 102 and a horizontal beam 103. The bottom of the vertical beam 102 is connected to the base 101, and the top of the vertical beam 102 is connected to the horizontal beam 103. The vertical beam 102 and the horizontal beam 103 form a gate-shaped structure; a guide rail is arranged on the horizontal beam 103, and the lifting component 2 is arranged below the horizontal beam 103 and is slidably connected to the horizontal beam 103.

[0034] The lifting component 2 is preferably a power hoist 201. In the present embodiment, two power hoists 201 are arranged in parallel. The two power hoists 201 are respectively located at the two ends of the beam 103. The power hoist 201 is connected to the bridge expansion joint connection component 3.

[0035] In this embodiment, the power hoist 201 is further preferably a walking electric hoist or a walking pneumatic hoist. Accordingly, the crossbeam 103 is provided with an I-beam of sufficient strength and length. The gear of the walking electric hoist or the walking pneumatic hoist moves along the axial direction of the I-beam. The hook pulley 202 of the walking electric hoist or the walking pneumatic hoist is connected to the bridge expansion joint connection assembly 3. The distance between the two walking electric hoists (or walking pneumatic hoists) can be adjusted according to the length of the bridge expansion joint, so that the two walking electric hoists (or walking pneumatic hoists) are respectively hoisted above the appropriate position of the bridge expansion joint to ensure the balance of the bridge expansion joint. When there is no need to adjust the usage scenario and a fixed power hoist is used, the power hoist can also be replaced by other lifting equipment such as a winch.

[0036] In order to enhance the safety during the lifting of the expansion joint of the bridge, an anti-fall safety device is arranged in the power hoist. This part is a commonly used method to ensure the safety of lifting. In this embodiment, the anti-fall safety device is preferably a commercially available SAJ40 (30) anti-fall safety device, which is mainly composed of gears, a centrifugal speed limiting device and a conical drum brake. Its working principle is that when the downward running speed of the protected target reaches the calibrated action speed, the swing block of its centrifugal speed limiting device is displaced (equivalent to a ratchet), driving the conical drum (equivalent to a ratchet) to move toward the brake belt, contact and generate a braking torque.

[0037] The bridge expansion joint connection assembly 3 includes a first traction steel cable 301, a second traction steel cable 302, a shackle 303 and a hook 304. The first traction steel cable 301 and the second traction steel cable 302 form a triangular structure when connected to the bridge expansion joint.

[0038] Specifically, the first traction steel cable 301 and the second traction steel cable 302 are detachably connected to the lifting assembly 2 through the shackle 303 respectively; the first traction steel cable 301 and the second traction steel cable 302 are detachably connected to the steel structure of the bridge expansion joint through the hook 304, and the first traction steel cable 301 and the second traction steel cable 302 are connected to the bridge expansion joint to form a triangular structure. The stable triangular structure can be used to hoist the bridge expansion joint more stably to prevent the bridge expansion joint from falling due to loose connection. At the same time, the hook can connect the bridge expansion joint more efficiently to prevent the bridge expansion joint from being damaged by the splint.

[0039] Furthermore, in order to increase the number of connection points between the suspension mechanism and the bridge expansion joint, each suspension mechanism is provided with a lifting component 2 to match two bridge expansion joint connection components 3. The two bridge expansion joint connection components 3 are arranged at two opposite ends of the bottom of the lifting component 2. In this embodiment, the two bridge expansion joint connection components 3 are arranged in parallel. The two bridge expansion joint connection components 3 form two fulcrums above the bridge expansion joint. Compared with the higher-strength rigid fastening of the bridge expansion joint, less damage is caused to the bridge expansion joint.

[0040] In order to prevent the expansion joint of the bridge from falling due to long-term wear of the traction cable and causing a safety accident, a wear detection component is arranged on the first traction cable 301 or the second traction cable 302 in this embodiment. The wear detection component includes a wire rope flaw detector 305 and a wire break warning device. The wire rope flaw detector 305 is mounted on the first traction cable 301 (or the second traction cable 302). The wire rope flaw detector 305 is electrically connected to the wire break warning device, and a warning is issued when there is a risk of breakage between the first traction cable 301 and the second traction cable 302.

[0041] In addition, in order to facilitate the cleaning of old concrete in the construction groove when dismantling the expansion joint of the bridge, the utility model prevents residual concrete blocks on the expansion joint of the bridge from causing uneven force and causing the expansion joint of the bridge to tilt. A purge assembly 4 is provided, and the purge assembly 4 includes an air compressor, a compressed air pipeline 401 and a nozzle 402. The air compressor is connected to the nozzle 402 through the compressed air pipeline 401, and the nozzle 402 is provided at the bridge expansion joint connection assembly 3. The expansion joint of the bridge before lifting is purged with compressed air to prevent residual concrete blocks on the expansion joint of the bridge from causing uneven force. The concrete blocks on the expansion joint of the bridge fall during lifting and hit the on-site workers or cause uneven force on the expansion joint of the bridge to tilt. Compared with manual cleaning, it is more efficient and more thorough.

[0042] For further optimization, in order to facilitate the movement of the entire device, a walking wheel 104 and a walking drive motor 105 are set below the base 101. The walking wheel 104 is rotatably connected to the base 101 through a connecting bracket and a rotating shaft, and the rotating shaft is connected to the output shaft of the walking drive motor 105.

[0043] The bridge expansion joint lifting device of this embodiment has the following working principle: start the travel drive motor 105, the travel drive motor 105 drives the travel wheel 104 to move the base 101, and move the device as a whole to a position close to the bridge expansion joint, and then start the running car of the power hoist 201 to move on the I-beam crossbeam, so that the power hoist 201 moves along the crossbeam 103 to above the appropriate lifting position of the bridge expansion joint; then connect the hook 304 of the bridge expansion joint connecting assembly 3 to the steel bars on the bridge expansion joint respectively, so that the first traction steel cable 301, the second traction steel cable 302 and the bridge expansion joint form a triangle, so that the bridge expansion joint can maintain balance when it is lifted, and then the power hoist 201 lifts the bridge expansion joint through the bridge expansion joint connecting assembly 3 and drives the bridge expansion joint to move, and then puts the bridge expansion joint into a suitable position.

Claims

1. A bridge expansion joint lifting device, characterized in that: It comprises a lifting bracket (1), on which a suspension mechanism for lifting and hoisting a bridge expansion joint is arranged, and two or more suspension mechanisms are arranged in parallel; The suspension mechanism comprises a lifting assembly (2) and a bridge expansion joint connection assembly (3); the top of the lifting assembly (2) is connected to the lifting bracket (1), and the bottom of the lifting assembly (2) is connected to the bridge expansion joint via the bridge expansion joint connection assembly (3); The lifting bracket (1) comprises a crossbeam (103), the lifting assembly (2) is a power hoist (201), the power hoist (201) is arranged on the crossbeam (103), and the hook pulley (202) of the power hoist (201) is connected to the bridge expansion joint connection assembly (3); The suspension mechanism comprises two bridge expansion joint connection assemblies (3), and the two bridge expansion joint connection assemblies (3) are arranged at two opposite ends of the bottom of the lifting assembly (2).

2. The bridge expansion joint lifting device according to claim 1 is characterized in that: The crossbeam (103) is an I-beam, and the power hoist (201) is a walking electric hoist or a walking pneumatic hoist, and the walking electric hoist or the walking pneumatic hoist moves along the axial direction of the I-beam.

3. The bridge expansion joint lifting device according to claim 1 is characterized in that: The bridge expansion joint connection assembly (3) comprises a first traction steel cable (301) and a second traction steel cable (302), one end of the first traction steel cable (301) and one end of the second traction steel cable (302) are respectively connected to the lifting assembly (2), the other end of the first traction steel cable (301) and the other end of the second traction steel cable (302) are respectively connected to the bridge expansion joint, and the first traction steel cable (301) and the second traction steel cable (302) form a triangular structure when connected to the bridge expansion joint.

4. The bridge expansion joint lifting device according to claim 3 is characterized in that: The bridge expansion joint connection assembly (3) further comprises a shackle (303), and the first traction steel cable (301) and the second traction steel cable (302) are both connected to the lifting assembly (2) via the shackle (303).

5. The bridge expansion joint lifting device according to claim 4 is characterized in that: The bridge expansion joint connection assembly (3) further comprises a hook (304), and the first traction steel cable (301) and the second traction steel cable (302) are both connected to the bridge expansion joint via the hook (304).

6. The bridge expansion joint lifting device according to claim 5 is characterized in that: A wear detection component is provided on the first traction steel cable (301) and / or the second traction steel cable (302), and the wear detection component comprises a wire rope flaw detector (305) and a wire break warning device. The wire rope flaw detector (305) is sleeved on the first traction steel cable (301) or the second traction steel cable (302), and the wire rope flaw detector (305) is electrically connected to the wire break warning device.

7. The bridge expansion joint lifting device according to claim 1 is characterized in that: The lifting bracket (1) also includes a base (101) and a vertical beam (102), the bottom of the vertical beam (102) is connected to the base (101), the top of the vertical beam (102) is connected to the cross beam (103), and the vertical beam (102) and the cross beam (103) form a gate-shaped structure.

8. The bridge expansion joint lifting device according to claim 1 is characterized in that: The lifting bracket (1) also includes a purge assembly (4), and the purge assembly (4) includes an air compressor, a compressed air pipeline (401) and a nozzle (402). The air compressor is connected to the nozzle (402) through the compressed air pipeline (401), and the nozzle (402) is arranged at the bridge expansion joint connection assembly (3).

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