Crown block structure suitable for low clearance underpass bridge erection

Abstract

The utility model provides a crown block structure suitable for low clearance underpass bridge erection, which comprises main beams arranged in parallel, a longitudinal moving crown block arranged at the top of the main beams, a transverse moving crown block arranged at the top of the longitudinal moving crown block, a pulley assembly arranged on the transverse moving crown block, and a steel wire rope wound on the pulley assembly. One end of the steel wire rope is connected with the winding device, the other end of the steel wire rope is connected with the movable pulley block, the bottom end of the movable pulley block is provided with a lifting hook, and the winding device is fixed at the end of the longitudinal moving crown block. The performance of the equipment is improved to ensure that the beam piece is successfully erected under the limited clearance, and the construction efficiency of the bridge is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge erection construction technical field, specifically related to a kind of sky crane structure suitable for low clearance underpass bridge erection. BACKGROUND

[0002] At present, as a common bridge structure form, prefabricated beam erection is usually carried out by bridge erecting machine, and the conventional double guide beam bridge erecting machine structure is composed of track, guide beam, travelling crane, hoisting equipment and the like. In order to ensure the longitudinal movement and transverse movement of beam piece during beam piece erection, the travelling crane structure often needs to have a certain height to ensure that the beam piece can smoothly pass through the track for longitudinal and transverse movement, which makes the overall bridge erecting machine structure height need a large clearance to meet the demand of beam piece erection. However, when the bridge underpasses existing structures, the reserved clearance is often low, which leads to the fact that the structure height of the bridge erecting machine cannot meet the actual demand on site during beam piece erection, and auxiliary supports or additional kneeling rods need to be set up for secondary beam moving, which is complex in operation and high in safety risk, and also reduces construction efficiency and increases cost. Especially during secondary beam moving, the prestressed beam piece is prone to stress change, resulting in irreversible structural damage of the beam piece. SUMMARY

[0003] The utility model aims at the existing problems, to find a kind of sky crane structure suitable for low clearance underpass bridge erection, to improve the performance of equipment to ensure the successful erection of beam piece under limited clearance, and to improve the construction efficiency of bridge.

[0004] In order to realize the above technical features, the utility model is realized as follows: a kind of sky crane structure suitable for low clearance underpass bridge erection, including parallelly arranged main girder, the top of main girder is installed with longitudinal moving trolley, the top of longitudinal moving trolley is installed with transverse moving trolley, transverse moving trolley is installed with pulley assembly, pulley assembly is wound with steel wire rope, one end of steel wire rope is connected with winch device, the other end of steel wire rope is connected with movable pulley group, the bottom end of movable pulley group is installed with lifting hook, winch device is fixed at the end head position of longitudinal moving trolley.

[0005] The main girder is supported on the top of the triangular support, the triangular support is fixed on the top of the fixed base, the fixed base is installed on the top end of the erected bridge deck, the erected bridge deck is supported on the top of the pier beam, and the pier beam is fixed on the top of the pier.

[0006] The main girder adopts truss structure, and the multiple truss structures are assembled, and the top end of the truss structure is paved with longitudinal guide rail for longitudinal moving trolley to move.

[0007] The longitudinal moving trolley has two, and moves longitudinally within the limit range of main girder.

[0008] The pulley assembly includes a fixed pulley group installed on the transversely moving overhead crane, and also includes a first steering pulley and a second steering pulley installed on the top of the transversely moving overhead crane; the wire rope passes around the first steering pulley and the second steering pulley in a looping manner, and then connects to the movable pulley group through the fixed pulley group.

[0009] A reinforcing rod is connected between the fixed bases located on the same side.

[0010] The winch device is fixed to the end of the longitudinally moving trolley via a support base. A reinforcing rib is fixed between the bottom end of the support base and the longitudinally moving trolley. The winch device is connected to the control system.

[0011] The winch device includes a winch base, and a double winch drum is rotatably supported on the top of the winch base via a roller seat. The double winch drum is connected to a winch motor for providing winch power.

[0012] The present invention has the following beneficial effects:

[0013] 1. This utility model adopts a crane structure and improves the performance of the equipment to ensure the successful erection of beams under limited clearance, thereby improving the construction efficiency of bridges.

[0014] 2. The aforementioned triangular bracket can provide reliable and stable support for the main beam, and the fixed base can provide reliable support for the triangular bracket.

[0015] 3. The use of the aforementioned main beam ensures the structural strength and stability.

[0016] 4. The pulley assembly described above can be used to transfer the traction force of the horizontally arranged wire rope to the vertical direction, thereby enabling the subsequent hoisting of the beam.

[0017] 5. The aforementioned winch device can be used to provide winch power. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic plan view of the overhead crane structure of this utility model.

[0020] Figure 2 This is a schematic elevation view of the overhead crane structure of this utility model.

[0021] Figure 3 This is a side view of the overhead crane structure of this utility model.

[0022] Figure 4 This is a structural diagram of the winch device of this utility model.

[0023] Figure 5For the present utility model Figure 2 A magnified view of the location of the longitudinally moving overhead crane.

[0024] In the diagram: 1. Main beam; 2. Longitudinal moving gantry crane; 3. Lateral moving gantry crane; 4. First steering pulley; 5. Support base; 6. Second steering pulley; 7. Winching device; 8. Control system; 9. Reinforcing rib; 10. Wire rope; 11. Fixed pulley block; 12. Moving pulley block; 13. Lifting hook; 14. Triangular bracket; 15. Fixed base; 16. Erected bridge deck; 17. Pier crossbeam; 18. Pier; 19. Reinforcing rod. Detailed Implementation

[0025] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0026] like Figures 1-5 As shown, a gantry crane structure suitable for erecting bridges under low clearance includes a parallel main beam 1, a longitudinally moving gantry crane 2 mounted on top of the main beam 1, and a transversely moving gantry crane 3 mounted on top of the longitudinally moving gantry crane 2. A pulley assembly is mounted on the transversely moving gantry crane 3, with a steel wire rope 10 looping around it. One end of the steel wire rope 10 is connected to a winch device 7, and the other end is connected to a movable pulley block 12. A lifting hook 13 is mounted at the bottom of the movable pulley block 12. The winch device 7 is fixed to the end of the longitudinally moving gantry crane 2. By improving the performance of the equipment, the successful erection of the bridge beams under limited clearance is ensured, thus improving the construction efficiency of the bridge. In specific use, the longitudinally moving gantry crane 2 drives the entire transversely moving gantry crane 3 to achieve longitudinal movement, thereby achieving longitudinal movement of the hoisted beams. The transversely moving gantry crane 3 enables lateral movement of the hoisted beams. The winch device 7 drives the steel wire rope 10, thereby achieving the hoisting operation of the beams.

[0027] Furthermore, the main beam 1 is supported on top of the triangular bracket 14, which is fixed to the top of the fixed base 15. The fixed base 15 is installed on the top of the erected bridge deck 16, which is supported on top of the pier crossbeam 17. The pier crossbeam 17 is fixed to the top of the pier 18. The triangular bracket 14 provides reliable and stable support for the main beam 1, and the fixed base 15 provides reliable support for the triangular bracket 14.

[0028] Furthermore, the main beam 1 adopts a truss structure, which is assembled from multiple truss sections. The top of the truss structure is covered with longitudinal guide rails for the longitudinal movement of the overhead crane 2. The use of the main beam 1 ensures its structural strength and stability.

[0029] Furthermore, there are two longitudinally moving overhead cranes 2, which travel longitudinally within the restricted area of ​​the main beam 1. Through the coordinated operation of the two longitudinally moving overhead cranes 2, the beam segment hoisting operation can be realized.

[0030] Furthermore, the fixed pulley block 11 is connected to the lateral moving trolley 2 as a whole, and the two can move laterally simultaneously.

[0031] Furthermore, the pulley assembly includes a fixed pulley group 11 mounted on the transversely moving overhead crane 3, and a first steering pulley 4 and a second steering pulley 6 mounted on the top of the transversely moving overhead crane 3. The wire rope 10, after looping around the first steering pulley 4 and the second steering pulley 6, is connected to the movable pulley group 12 via the fixed pulley group 11. This pulley assembly can be used to transfer the traction force of the horizontally arranged wire rope 10 to the vertical direction, thereby enabling subsequent hoisting of the beam. The first steering pulley 4 and the second steering pulley 6 can be used to change the direction of the wire rope, thus redirecting the traction force. The cooperation between the fixed pulley group 11 and the movable pulley group 12 achieves a labor-saving effect, ensuring smooth subsequent hoisting operations.

[0032] Furthermore, a reinforcing rod 19 is connected between the fixed bases 15 located on the same side. The reinforcing rod 19 enhances the reliability and stability of the connection between the fixed bases 15.

[0033] Furthermore, the hoisting device 7 is fixed to the end of the longitudinally moving overhead crane 2 via a support base 5. A reinforcing rib 9 is fixed between the bottom end of the support base 5 and the longitudinally moving overhead crane 2. The hoisting device 7 is connected to the control system 8. The aforementioned reinforcing rib 9 enhances the structural strength of the connection between the support base 5 and the longitudinally moving overhead crane 2. The control system 8 is connected to the motor of the hoisting device 7 via wires, and the operator controls the start and stop of the hoisting device through the control system.

[0034] Furthermore, the winch device 7 includes a winch base 704, on the top of which a double winch drum 702 is rotatably supported by a roller seat 703. The double winch drum 702 is connected to a winch motor 701 for providing winch power. The winch device 7 provides winch power; during operation, the winch motor 701 drives the double winch drum 702, which in turn drives the wire rope 10. The wire rope 10 then drives the lifting hook 13 to raise and lower, thus lifting the beam segment.

[0035] The working process and principle of this utility model:

[0036] When it is necessary to hoist the beam segment, firstly, the lifting hook 13 is positioned directly above the beam segment to be hoisted through the cooperation between the longitudinal moving trolley 2 and the transverse moving trolley 3. Then, the winch device 7 is started, and the winch motor 701 drives the double winch drum 702, which in turn drives the wire rope 10. The wire rope 10 drives the lifting hook 13 to rise and fall. When the winch device 7 moves forward, the lifting hook 13 rises through the wire rope 10. When the winch device 7 moves in the reverse direction, the lifting hook 13 falls through the wire rope 10, thus hoisting the beam segment. After hoisting, the longitudinal moving trolley 2 and the transverse moving trolley 3 are used to adjust the longitudinal and transverse positions of the beam segment, thereby achieving precise alignment and installation of the beam segment.

Claims

1. A crane structure suitable for erecting underpasses with low clearance, characterized in that, The system includes a parallel main beam (1), a longitudinal moving crane (2) installed on the top of the main beam (1), a transverse moving crane (3) installed on the top of the longitudinal moving crane (2), a pulley assembly installed on the transverse moving crane (3), a wire rope (10) wrapped around the pulley assembly, one end of the wire rope (10) is connected to a winch device (7), the other end of the wire rope (10) is connected to a movable pulley block (12), a lifting hook (13) is installed at the bottom of the movable pulley block (12), and the winch device (7) is fixed at the end of the longitudinal moving crane (2).

2. The overhead crane structure suitable for erecting underpasses with low clearance according to claim 1, characterized in that: The main beam (1) is supported on the top of the triangular bracket (14), the triangular bracket (14) is fixed on the top of the fixed base (15), the fixed base (15) is installed on the top of the erected bridge deck (16), the erected bridge deck (16) is supported on the top of the pier beam (17), and the pier beam (17) is fixed on the top of the pier (18).

3. The overhead crane structure suitable for erecting underpasses with low clearance according to claim 1, characterized in that: The main beam (1) adopts a truss structure, which is assembled from multiple truss sections. The top of the truss structure is covered with a longitudinal guide rail for the longitudinal movement of the overhead crane (2).

4. The overhead crane structure suitable for erecting underpasses with low clearance according to claim 1, characterized in that: There are two longitudinal moving cranes (2), which travel longitudinally within the restricted area of ​​the main beam (1).

5. A crane structure suitable for erecting underpasses with low clearance, as described in claim 1, characterized in that: The pulley assembly includes a fixed pulley group (11) installed on the transverse moving crane (3), and also includes a first steering pulley (4) and a second steering pulley (6) installed at the top of the transverse moving crane (3); the wire rope (10) passes around the first steering pulley (4) and the second steering pulley (6) in a loop manner, and then connects to the movable pulley group (12) through the fixed pulley group (11).

6. A crane structure suitable for erecting underpasses with low clearance, as described in claim 2, characterized in that: A reinforcing rod (19) is connected between the fixed bases (15) located on the same side.

7. A crane structure suitable for erecting underpasses with low clearance, as described in claim 1, characterized in that: The winch device (7) is fixed to the end of the longitudinal moving trolley (2) by a support base (5). A reinforcing rib plate (9) is fixed between the bottom end of the support base (5) and the longitudinal moving trolley (2). The winch device (7) is connected to the control system (8).

8. A crane structure suitable for erecting underpasses with low clearance, as described in claim 1, characterized in that: The winch device (7) includes a winch base (704), the top of which is rotatably supported by a double winch drum (702) via a roller seat (703), and the double winch drum (702) is connected to a winch motor (701) for providing winch power.

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