Safe and rapid type special lifting appliance for lifting prefabricated box culvert

Abstract

The utility model relates to the technical field of box culvert transportation, in particular to a safe and fast type special lifting appliance for lifting a prefabricated box culvert, which comprises a steel truss girder and a lifting ring, steel beam sliding rails are arranged on two sides of the steel truss girder, the lifting ring is positioned in the middle of the upper side of the steel truss girder, lifting legs are arranged on the lower side of the steel truss girder, and sliding shoes are arranged at the tops of the lifting legs. The sliding shoe sleeves the steel beam sliding rail and is in sliding connection with the steel beam sliding rail, and a pressing rod is arranged on the lower side of the steel truss beam; an adjusting device is arranged on one side of the top of the lifting leg, the adjusting device comprises a hinge seat, a screw rod and a quick release seat, the hinge seat is hinged to the lifting leg, the quick release seat is connected with the hinge seat through the screw rod, clamping teeth are arranged on the lower side of the quick release seat, and clamping grooves matched with the clamping teeth are formed in the upper surface of the steel truss girder; the slidable lifting leg is arranged on the lower side of the steel truss girder, the lifting leg is controlled by the adjusting device and is convenient to open and close, meanwhile, the adjusting device is provided with the screw rod and the quick release seat, the structure is simple, the equipment cost is low, the disassembly and assembly are convenient, and the use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of box culvert transportation technology, and in particular to a safe and fast lifting tool for transporting prefabricated box culverts. Background Technology

[0002] In shield tunnel construction, precast box culverts are carried out simultaneously with shield excavation and also serve as transportation routes. The structure of a precast box culvert is generally a flat top, an arc-shaped bottom, and a hollow culvert in the middle. The cross-sectional dimensions are huge, and as a cement product, it is also very heavy. This places extremely high demands on the lifting equipment. In the existing technology, the lifting equipment structure is complex, the cost is high, and the disassembly and assembly are inconvenient during lifting and unloading, which affects the efficiency of the lifting equipment clamping. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a safe and fast lifting tool for transporting precast box culverts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A safe and fast lifting device for transporting precast box culverts includes a steel truss and a lifting ring. The steel truss has steel beam rails on both sides, arranged in an I-shape. The lifting ring is located at the upper middle part of the steel truss. A lifting leg is located on the lower side of the steel truss, and a sliding shoe is provided at the top of each leg. The sliding shoe is fitted onto the steel beam rail and slidably connected to it. A pressure rod is provided on the lower side of the steel truss. An adjustment device is provided on one side of the top of each leg. The adjustment device includes a hinge seat, a screw, and a quick-release seat. The hinge seat is hinged to the leg, and the quick-release seat is connected to the hinge seat via the screw. A locking tooth is provided on the lower side of the quick-release seat, and a groove adapted to the locking tooth is formed on the upper surface of the steel truss.

[0006] Preferably, the lifting legs are provided in at least four sets and are symmetrically arranged on the lower side of the steel truss beam. The lifting legs are L-shaped, and the inner side of the lifting legs is provided with side pads and the lower end of the lifting legs is provided with lower pads.

[0007] Preferably, the sliding shoe is provided with rollers that abut against the steel beam slide rail, and the end of the steel beam slide rail is provided with a limiting plate corresponding to the sliding shoe.

[0008] Preferably, the pressure bar is slidably connected to the steel truss beam, and a spring is provided at the top of the pressure bar.

[0009] Preferably, one end of the screw passes through the hinge seat and is rotatably connected thereto. The quick-release seat has a threaded hole on its upper side that is adapted to the screw, and the screw and the quick-release seat are connected by threads.

[0010] Preferably, the card slots are provided in multiple sets and arranged in an array along the sliding direction of the slipper, and the quick-release base is provided with a magnetic block.

[0011] The beneficial effects of this utility model are as follows:

[0012] Compared with the prior art, the present invention features a sliding leg on the lower side of the steel truss beam. The leg is controlled by an adjustment device, which is convenient to open and close. The adjustment device is equipped with a screw and a quick-release seat, which has a simple structure, low equipment cost, and is easy to assemble and disassemble. It can also be finely adjusted and locked to prevent shaking and loosening of the quick-release seat, making it more convenient, safe and reliable to use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a special lifting tool for safe and fast precast box culverts proposed in this utility model;

[0014] Figure 2 for Figure 1 A magnified schematic diagram of the structure of part A in the diagram;

[0015] Figure 3 This is a partial cross-sectional structural diagram of a special lifting tool for safe and fast precast box culvert transportation proposed in this utility model.

[0016] In the diagram: 1. Steel truss beam; 11. Slot; 2. Lifting ring; 3. Counterweight box; 4. Lifting leg; 41. Roller; 42. Side pad; 43. Lower pad; 5. Adjustment device; 51. Hinge seat; 52. Screw; 53. Quick release seat; 531. Locking tooth; 6. Pressure bar. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] Reference Figure 1-3A safe and fast lifting device for precast box culverts includes a steel truss beam 1 and lifting rings 2. The steel truss beam 1 is equipped with a counterweight box 3 to adjust the balance of the lifting device, prevent tilting and swaying, and ensure lifting safety. A ladder is provided on one side of the counterweight box 3 to facilitate workers to go up and down for inspection and disassembly of the box culverts. It is also convenient for workers to climb to the top of the lifting device to detach and hang the hook. Steel beam rails are provided on both sides of the steel truss beam 1, and the steel beam rails are distributed in an I-shape. The lifting rings 2 are located in the middle of the upper side of the steel truss beam 1 and are used to hang on the crane hook for lifting. The lower side of the steel truss beam 1 is equipped with lifting legs 4. There are at least four sets of lifting legs 4, which are symmetrically arranged on the lower side of the steel truss beam 1. The lifting legs 4 are L-shaped. Side pads 42 are provided on the inner side of the lifting legs 4, and lower pads 43 are provided at the lower end of the lifting legs 4 for clamping the precast box culvert.

[0019] The top of the gantry 4 is equipped with a sliding shoe, and the sliding shoe is equipped with a roller 41 that abuts against the steel beam slide rail. The sliding shoe is fitted onto the steel beam slide rail and is slidably connected to it by the roller 41. The gantry 4 slides back and forth along the steel beam slide rail to clamp or release the box culvert. The end of the steel beam slide rail is equipped with a limiting plate corresponding to the sliding shoe to prevent the sliding shoe from detaching from the steel beam slide rail when sliding. The lower side of the steel truss beam 1 is equipped with a pressure rod 6, which is slidably connected to the steel truss beam 1. The top of the pressure rod 6 is equipped with a spring. The spring holds the lower end of the pressure rod 6 against the precast box culvert to achieve positioning and improve clamping reliability.

[0020] An adjustment device 5 is provided on one side of the top of the leg 4 to control the sliding of the leg 4 to lock and fix it in a designated position. The adjustment device 5 includes a hinge seat 51, a screw 52 and a quick-release seat 53. The hinge seat 51 is hinged to the leg 4 and can swing up and down. The quick-release seat 53 is connected to the hinge seat 51 through the screw 52. One end of the screw 52 passes through the hinge seat 51 and is rotatably connected to it. The other end of the screw 52 has a hexagonal head, which is convenient to connect an electric wrench for tightening or loosening, which greatly reduces the labor intensity of workers. The quick-release seat 53 has a threaded hole on the upper side that matches the screw 52. The screw 52 and the quick-release seat 53 are connected by threads. By rotating the screw 52, ​​the position of the quick-release seat 53 on the screw 52 can be adjusted.

[0021] The quick-release seat 53 has a locking tooth 531 on its lower side, and the upper surface of the steel truss beam 1 has a locking groove 11 that matches the locking tooth 531. There are multiple sets of locking grooves 11, which are arranged in an array along the sliding direction of the slipper. The quick-release seat 53 is equipped with a magnetic block. The quick-release seat 53 is magnetically attracted to the steel truss beam 1 by the magnetic force of the magnetic block. The locking tooth 531 engages with the locking groove 11, which restricts the horizontal movement of the quick-release seat 53, thereby fixing the screw 52 and realizing quick release. By rotating the screw 52, ​​fine-tuning and clamping can be performed to improve the ease of use of the lifting device.

[0022] In this embodiment, after the precast box culvert is cured, it is transported. Wooden blocks or pads are placed at the bottom of the box culvert. Construction workers climb the lifting device by climbing ladder, turn the screw 52, ​​and the locking teeth 531 on the lower side of the quick release seat 53 disengages from the slot 11. Push the lifting leg 4, and the sliding shoe slides on the steel beam slide rail. The lifting legs 4 move away from each other, the lifting device is opened, and the crane is operated to lift the lifting device onto the box culvert. The pressure rod 6 contacts the box culvert for positioning and to ensure reliable clamping.

[0023] Afterwards, the operator climbs onto the lifting gear, adjusts the counterweights in the counterweight box 3, and pulls the sliding shoe to bring the lifting leg 4 close to the box culvert. The side pads 42 and the lower pads 43 are respectively pressed against the surface of the box culvert. The screw 52 is turned to engage the locking teeth 531 into the locking slot 11. The quick-release seat 53 is magnetically attached to the steel truss beam 1. The screw 52 is rotated for fine-tuning. The two adjustment devices on both sides are locked together to ensure that the lifting leg 4 clamps the box culvert. The lifting gear is not easy to loosen and is not easy to damage the concrete edges of the box culvert, thus avoiding the box culvert from shaking and affecting subsequent lifting operations.

[0024] In addition, when the screw 52 has been used for a long time and the threads are worn, the quick release seat 53 can be switched to work in other slots 11 to avoid the worn parts of the screw 52 and reduce equipment maintenance costs.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

Claims

1. A special lifting device for lifting prefabricated box culvert safely and quickly, comprising a steel truss beam (1) and a lifting ring (2), characterized in that, The steel truss (1) is provided with steel beam slide rails on both sides. The steel beam slide rails are distributed in an I-shape. The lifting ring (2) is located in the middle of the upper side of the steel truss (1). The lower side of the steel truss (1) is provided with a lifting leg (4). The top of the lifting leg (4) is provided with a sliding shoe. The sliding shoe is fitted on the steel beam slide rail and is slidably connected to it. The lower side of the steel truss (1) is provided with a pressure bar (6). An adjustment device (5) is provided on one side of the top of the leg (4). The adjustment device (5) includes a hinge seat (51), a screw (52) and a quick-release seat (53). The hinge seat (51) is hinged to the leg (4). The quick-release seat (53) is connected to the hinge seat (51) through the screw (52). The quick-release seat (53) has a locking tooth (531) on its lower side. The upper surface of the steel truss beam (1) has a slot (11) that matches the locking tooth (531).

2. The special hoisting device for hoisting the prefabricated box culvert safely and quickly according to claim 1, characterized in that, The lifting leg (4) is provided in at least four sets and is symmetrically arranged on the lower side of the steel truss beam (1). The lifting leg (4) is L-shaped. The inner side of the lifting leg (4) is provided with a side pad (42) and the lower end of the lifting leg (4) is provided with a lower pad (43).

3. The special lifting tool for safe and quick transport of precast box culverts according to claim 1, characterized in that, The sliding shoe is provided with a roller (41) that abuts against the steel beam slide rail, and the end of the steel beam slide rail is provided with a limiting plate corresponding to the sliding shoe.

4. The special hoisting device for hoisting prefabricated box culvert safely and quickly according to claim 1, characterized in that, The pressure bar (6) is slidably connected to the steel truss beam (1), and a spring is provided at the top of the pressure bar (6).

5. The special hoisting device for hoisting prefabricated box culvert according to claim 1, characterized in that, One end of the screw (52) passes through the hinge seat (51) and is rotatably connected to it. The upper side of the quick-release seat (53) is provided with a threaded hole that is compatible with the screw (52). The screw (52) and the quick-release seat (53) are connected by threads.

6. The special hoisting harness for safely and quickly hoisting prefabricated box culverts according to claim 1, characterized in that, The card slot (11) is provided in multiple sets and arranged in an array along the sliding direction of the slipper, and the quick-release base (53) is provided with a magnetic block.

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