Prefabricated small box girder wet joint formwork lifting device

Abstract

The utility model discloses a lifting device for a prefabricated small box girder wet joint formwork. The lifting device comprises a small trolley and a lifting assembly arranged on the small trolley. Wherein the trolley comprises a trolley body and a trolley frame erected on the trolley body, the trolley frame is provided with a handrail and a foot support, the trolley frame can be held by an operator through the handrail so that the operator can push the trolley to enter the yard, and the foot support is used for supporting the trolley to the ground after the trolley enters the yard so as to keep the trolley balanced and stable; the lifting assembly is longitudinally limited to the top of the frame through a limiting rod and comprises a supporting rod, a load plate and a miniature electric hoist, the supporting rod is arranged in the limiting rod in a limited mode, the load plate is fixedly arranged in the middle of the bottom of the supporting rod, and the miniature electric hoist is fixedly arranged at the bottom of the load plate and can lift or descend the formwork. The lifting device disclosed by the utility model greatly improves the construction process flow, and has the advantages of being operated by a single person, flexible to move and transfer, simple and convenient to construct, reusable and capable of saving manpower and construction cost.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of bridge construction auxiliary devices, and more specifically, relate to a precast small box girder wet joint template lifting device. Background Technology

[0002] In bridge construction, the construction of wet joints in precast box girders is one of the key steps. A wet joint is a concrete strip poured after the precast box girder is installed, connecting the beams together. After the precast beams are erected, wet joint construction is required for the bridge superstructure. This involves pouring concrete between the beam joints to connect the beams laterally, thus binding them together as a whole. However, prior to this, it is necessary to install pre-reserved transverse diaphragm reinforcement, wet joint reinforcement, formwork, and other necessary work.

[0003] Traditional methods for lifting wet joint formwork often require a large amount of manual labor, which is not only inefficient but also poses safety hazards. Furthermore, due to the large weight and size of the formwork, traditional lifting methods often struggle to ensure the stability and accuracy of the formwork during the lifting process, thus affecting construction quality and schedule.

[0004] Therefore, it is of great significance to develop an efficient, safe, and easy-to-operate precast small box girder wet joint formwork lifting device. Summary of the Invention

[0005] In view of the problems of low efficiency, instability and inaccuracy of existing lifting methods, this utility model provides a precast small box girder wet joint template lifting device to solve these problems.

[0006] To achieve the above objectives, this utility model provides a precast small box girder wet joint template lifting device, including a manual trolley for transfer operations, which includes a trolley body and a frame mounted on the trolley body. The top of the frame is provided with a top longitudinal beam and a top transverse beam. A lifting assembly is longitudinally limited to the top of the frame by a limiting rod. The lifting assembly includes a support rod, a load plate and a mini electric hoist. The support rod is limited within the limiting rod, the load plate is fixedly located at the bottom middle of the support rod, and the mini electric hoist is fixedly located at the bottom of the load plate, which lifts and lowers the template.

[0007] Furthermore, the load plate is a T-shaped plate, which includes a horizontal plate and a vertical plate fixed to the horizontal central axis at the top of the horizontal plate.

[0008] Furthermore, the front and rear ends of the horizontal plate are respectively placed on the top horizontal beam, and the vertical plate is used to fix and install the mini electric hoist.

[0009] Furthermore, the vertical plate has multiple bolt holes, which are used to fix the mini electric hoist to the vertical plate by engaging with bolts.

[0010] Furthermore, the limiting rods longitudinally limit both ends of the support rods, with two rods on each side of the top of the frame, and the spacing between the two limiting rods on the same side is adapted to the support rod.

[0011] Furthermore, the limiting rod is made of alloy steel and is vertically fixed to the top longitudinal beam by welding.

[0012] Furthermore, the vehicle body includes an axle and wheels rotatably mounted at both ends of the axle; furthermore, the wheels are solid rubber tires.

[0013] Furthermore, the frame is a steel frame structure, with top longitudinal beams on both sides of the top, and two sets of top crossbeams arranged in parallel between the two top longitudinal beams.

[0014] Furthermore, the top crossbeam is fitted with a limiting ring, which is located on both sides of the load plate to restrict the lateral displacement of the load plate. The limiting ring is made of a rubber material with tensioning capacity.

[0015] Furthermore, a storage box made of acrylic material is also fixedly installed on the frame.

[0016] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0017] (1) The lifting device of this utility model is modified by using a manual trolley commonly used on construction sites and adding lifting components, which greatly improves the construction process. It has the advantages of single-person operation, flexible movement and relocation, simple and convenient construction, reusability, and saving manpower and construction costs.

[0018] (2) The lifting device of this utility model limits the longitudinal displacement of the support rod by limiting the limit rod and limits the lateral displacement of the load plate by providing a limit ring and isolates and buffers the vibration. It can maintain the stability of the lifting components when they are working simultaneously. The two modifications to the trolley are small. Without affecting the use of other functions of the trolley in the later stage, the stable implementation of simultaneous operation is guaranteed.

[0019] (3) The lifting device of this utility model improves the convenience of device storage by providing a miscellaneous box, which allows construction personnel to store construction tools and disassembled lifting components, thereby reducing the labor intensity of construction personnel. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a precast small box girder wet joint template lifting device in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the trolley in the embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the lifting component in an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the limiting ring in an embodiment of the present invention.

[0024] In all the accompanying drawings, the same reference numerals indicate the same technical features, specifically: 1-car body, 2-frame, 201-top longitudinal beam, 202-top crossbeam, 3-limiting rod, 4-support rod, 5-load plate, 501-horizontal plate, 502-vertical plate, 503-bolt hole, 6-mini electric hoist, 7-limiting ring, 8-miscellaneous box. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figure 1-4 As shown, this utility model provides a lifting device for wet joint formwork of precast small box girder, including a trolley and a lifting assembly mounted on the trolley. The trolley includes a body 1 and a frame 2 mounted on the body 1. The frame 1 is equipped with a handrail and foot support. The handrail allows the operator to hold the trolley and push it onto the site. The foot support provides ground support after the trolley is on site, maintaining its balance and stability. The lifting assembly is longitudinally limited to the top of the frame 2 by a limiting rod 3. It includes a support rod 4, a load plate 5, and a mini electric hoist 6. The support rod 4 is limited within the limiting rod 3. The load plate 5 is fixed at the bottom center of the support rod 4. The mini electric hoist 6 is fixed at the bottom of the load plate 5, and it can lift and lower the formwork. This lifting device greatly improves the construction process, offering advantages such as single-person operation, flexible movement and relocation, simple and convenient construction, reusability, and savings in manpower and construction costs.

[0027] like Figure 1-2As shown, the trolley can be a manual trolley commonly used for transportation operations on construction sites. It can move freely in the bridge construction area, and the mobility of the lifting device reduces the need for formwork lifting. The trolley includes a body 1 and a frame 2. The body 1 includes an axle and wheels rotatably mounted at both ends of the axle. Furthermore, the wheels use solid rubber tires to enhance the load-bearing capacity of the trolley. The frame 2 is mounted on the axle of the body 1. The frame 2 is a steel frame structure, with top longitudinal beams 201 on both sides of its top. Two sets of top crossbeams 202 are also arranged parallel between the two top longitudinal beams 201.

[0028] The limiting rods 3 longitudinally limit the two ends of the support rod 4. Two rods are provided on each side of the top of the frame 2. The spacing between the two limiting rods 3 on the same side is adapted to the support rod 4, forming a groove structure to longitudinally limit the support rod 4 and prevent it from shifting during lifting operations, thus affecting the lifting effect. Furthermore, the limiting rods 3 are made of alloy steel and are vertically fixed to the top longitudinal beam 201 by welding.

[0029] like Figure 1 , 3 As shown in the embodiment of this utility model, the lifting assembly includes a support rod 4, a load plate 5, and a mini electric hoist 6. The support rod 4 is made of hollow alloy steel pipe, which reduces stress concentration, reduces bending of the support rod due to excessive weight of the template, and enhances the stability of the lifting assembly. The length of the support rod 4 exceeds the width of the frame 2. By pulling the support rod 4 for lateral fine-tuning, the mini electric hoist 6 can be quickly aligned with the lifting module, avoiding the need for operators to adjust the trolley multiple times for alignment.

[0030] The load plate 5 is a T-shaped plate, comprising a horizontal plate 501 and a vertical plate 502 fixed to the horizontal center axis at the top of the horizontal plate 501. The front and rear ends of the horizontal plate 501 are respectively placed on the top horizontal beam 201, and the vertical plate 502 is used to fix and install the mini electric hoist 6. The load plate 5 is made of alloy steel plate and has a T-shaped steel plate structure, which has high bending resistance and improves the application range of the lifting device. During the template lifting process, the load plate 5 mainly bears the force, protecting the structural safety of the device and preventing it from falling off and being damaged. Furthermore, the vertical plate 502 has multiple bolt holes 503, which are used to fix the mini electric hoist 6 to the vertical plate 502 by cooperating with bolts.

[0031] Furthermore, the bolt holes 503 are provided in 12 sets, and the mini electric hoist 6 is installed by means of 12 bolt rods, which ensures that the mini electric hoist 6 is installed securely. The mini electric hoist 6 can lift objects weighing less than 200kg.

[0032] To improve the stability of the operation and prevent displacement caused by vibration during the lifting operation of the mini electric hoist 6, the lifting assembly is equipped with limiting rings 7 on both sides for limiting and buffering. There are four limiting rings 7, two of which are fitted on each of the two sets of top crossbeams 202. They are located on both sides of the cross plate 501 and are made of rubber material with tension capacity. The inner diameter of the limiting ring 7 is smaller than the diameter of the top crossbeam 202. It is fixed to the top crossbeam 202 by its own tension force, thereby limiting the lateral displacement of the load plate 5 and isolating and buffering vibration to avoid vibration of the load plate 5.

[0033] Preferably, the trolley is also equipped with a storage box 8 for storing the corresponding construction tools, reducing the labor intensity of construction workers; the storage box 8 is made of acrylic material and is installed and fixed on the frame 2, which makes it convenient for construction workers to store construction tools and disassembled lifting components, and facilitates the use of the lifting device by construction workers.

[0034] When using the lifting device of this utility model, the operator pushes the trolley into the construction area of ​​the bridge wet joint, places the lifting component on the frame 2, sets the support rod 4 within the limiting rod 3, and places the front and rear ends of the horizontal plate 501 on the top beam 201 respectively. After completion, the mini electric hoist 6 is aligned with the module to be lifted, the cable is lowered, and the corresponding module is lifted. After completion, the operator can remove the lifting component from the trolley, store the lifting component, and use the trolley for other operations.

[0035] The lifting device of this utility model is modified from a manual wheelbarrow commonly used on construction sites and equipped with lifting components, which greatly improves the construction process. It has the advantages of single-person operation, flexible movement and relocation, simple and convenient construction, reusability, and saving manpower and construction costs.

[0036] The lifting device of this utility model limits the longitudinal displacement of the support rod 4 by the limiting rod 3 and limits the lateral displacement of the load plate 5 by the limiting ring 7 and isolates and buffers vibration. It can maintain the stability of the lifting components when they are working simultaneously. Both of them require little modification to the trolley and ensure the stable implementation of simultaneous operation without affecting the use of other functions of the trolley in the later stage.

[0037] The lifting device of this utility model improves the convenience of device storage by providing a miscellaneous storage box 8, which allows construction workers to store construction tools and disassembled lifting components, thereby reducing the labor intensity of construction workers.

[0038] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precast small box girder wet joint formwork lifting device, characterized in that, include: A manual trolley for transport operations includes a body (1) and a frame (2) mounted on the body (1). The frame (2) has a top longitudinal beam (201) and a top cross beam (202) on top. The lifting assembly, which is longitudinally limited at the top of the frame (2) by the limiting rod (3), includes a support rod (4), a load plate (5) and a mini electric hoist (6). The support rod (4) is limited within the limiting rod (3), the load plate (5) is fixedly located at the middle of the bottom of the support rod (4), and the mini electric hoist (6) is fixedly located at the bottom of the load plate (5), which lifts and lowers the template.

2. The precast small box girder wet joint formwork lifting device according to claim 1, characterized in that, The load plate (5) is a T-shaped plate, which includes a horizontal plate (501) and a vertical plate (502) fixed vertically on the horizontal central axis at the top of the horizontal plate (501).

3. The precast small box girder wet joint formwork lifting device according to claim 2, characterized in that, The front and rear ends of the horizontal plate (501) are respectively placed on the top horizontal beam (202), and the vertical plate (502) is used to fix and install the mini electric hoist (6).

4. The precast small box girder wet joint formwork lifting device according to claim 3, characterized in that, The vertical plate (502) has multiple bolt holes (503) for fixing the mini electric hoist (6) to the vertical plate (502) by engaging with bolts.

5. A precast small box girder wet joint formwork lifting device according to any one of claims 1-4, characterized in that, The limiting rod (3) longitudinally limits both ends of the support rod (4). There are two rods on each side of the top of the frame (2), and the distance between the two limiting rods (3) on the same side is adapted to the support rod (4).

6. A precast small box girder wet joint formwork lifting device according to any one of claims 1-4, characterized in that, The limiting rod (3) is made of alloy steel and is vertically fixed to the top longitudinal beam (201) by welding.

7. A precast small box girder wet joint formwork lifting device according to any one of claims 1-4, characterized in that, The vehicle body (1) includes an axle and wheels rotatably mounted at both ends of the axle; the wheels are made of solid rubber tires.

8. A precast small box girder wet joint formwork lifting device according to claim 7, characterized in that, The frame (2) is a steel frame structure, with top longitudinal beams (201) on both sides of the top, and two sets of top crossbeams (202) are arranged in parallel between the two top longitudinal beams (201).

9. A precast small box girder wet joint formwork lifting device according to claim 8, characterized in that, A limiting ring (7) is fitted on the top crossbeam (202). The limiting ring (7) is located on both sides of the load plate (5) to restrict the lateral displacement of the load plate (5). It is made of rubber material with tensioning capacity.

10. A precast small box girder wet joint formwork lifting device according to claim 7, characterized in that, The frame (2) is also fixedly provided with a storage box (8), which is made of acrylic material.

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