Simple precast beam formwork hoist

Abstract

The utility model relates to prefabricated box girder, prefabricated T beam template of highway, railway's installation and dismounting device, concretely relates to a simple prefabricated beam template hoist, including hoist main component and flexible connecting piece, hoist main component includes two first channel steel, the web between two ends of two first channel steel all respectively jointly has the second channel steel of welding, still respectively welds third channel steel and reinforcing steel between the web of two first channel steel, the distance between third channel steel and reinforcing steel is 750mm, the distance between second channel steel of third channel steel and its adjacent end is 180mm, the distance between second channel steel of reinforcing steel and its adjacent end is 150mm, flexible connecting piece includes steel cable, the loop of both ends of steel cable forms respectively, the loop of one end is hung and is equipped with horseshoe unhooking, the utility model has the advantages of light, simple structure, convenient operation, ensure that prefabricated beam body template installation and dismounting efficiency is high, reduces construction cost low, safety is strong, and the adaptability is strong.

Description

Technical Field

[0001] This utility model relates to a device for installing and dismantling precast box girder and precast T-beam formwork for highways and railways, specifically a simple precast beam formwork hoist. Background Technology

[0002] In the precast construction of prestressed concrete T-beams and box girders for highways and railways, the installation and dismantling of formwork is a crucial process. Traditional formwork lifting tools often employ rigid hangers welded from structural steel sections or direct slinging with wire ropes. These traditional lifting tools have significant drawbacks: First, rigid hangers are heavy, cumbersome to operate, require large lifting equipment, are inconvenient to move and store, and result in high construction costs. Second, wire rope slinging is prone to formwork deformation, and the contact between the wire rope and the sharp edges of the formwork poses a safety hazard of wear and breakage. Furthermore, it is difficult to precisely control the balance of the formwork, leading to low installation efficiency. In addition, traditional lifting tools have poor versatility and are not adaptable to formwork of different sizes, requiring the use of multiple lifting tools, increasing equipment and management costs. Therefore, there is an urgent need for a lightweight, simple, safe, reliable, and highly adaptable specialized lifting tool to improve construction efficiency, ensure operational safety, and reduce overall costs. Summary of the Invention

[0003] This utility model addresses the technical problems of traditional lifting tools, such as heavy weight, inconvenient operation, low installation efficiency, and poor adaptability. It provides a simple precast beam formwork lifting tool with the advantages of simple structure, light weight, convenient operation, high efficiency in installing and dismantling precast beam formwork, low construction cost, strong safety, and strong adaptability. It can eliminate the need for bulky and complex lifting tools.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A simple precast beam formwork lifting tool includes a main lifting tool component and flexible connecting parts; The main component of the lifting device includes two parallel first channel steels. A second channel steel is welded between the webs at both ends of the two first channel steels. A third channel steel and a reinforcing bar are also welded between the webs of the two first channel steels. The distance between the third channel steel and the reinforcing bar is 750mm. The distance between the third channel steel and its adjacent second channel steel is 180mm. The distance between the reinforcing bar and its adjacent second channel steel is 150mm. The openings of the second and third channel steels face the same direction. The flexible connector includes a steel cable, with loops formed at both ends of the steel cable, and a horseshoe shackle is attached to one end of the loop.

[0005] Furthermore, the first channel steel, the second channel steel, and the third channel steel are all made of 12.6# channel steel, with the first channel steel having a length of 1100mm and the second and third channel steels each having a length of 80mm.

[0006] Furthermore, the reinforcing bar is an 8cm long HRB400Φ22 reinforcing bar.

[0007] Furthermore, the steel cable is made of Φ14mm steel wire rope with a length of 2m.

[0008] Furthermore, the horseshoe shackle is a 25t horseshoe lifting ring.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The main frame of this lifting device can be directly fabricated using common materials available on the construction site. It is rapidly formed through cutting and welding, offering advantages such as readily available materials, simple fabrication, and low cost. The entire structure is compact and lightweight, facilitating transport and movement within the site, making it ideal for the limited space conditions in beam yards. Furthermore, this lifting device is simple and practical, allowing for quick and easy operation.

[0010] This utility model has the advantages of being lightweight, simple, easy to operate, ensuring high efficiency in the installation and dismantling of precast beam formwork, reducing construction costs, being highly safe, and highly adaptable. It can eliminate the need for heavy and complex lifting tools. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main components of the lifting device of this utility model.

[0012] Figure 2 This is a schematic diagram showing the disassembled main components of the lifting device of this utility model.

[0013] Figure 3 This is a schematic diagram of the flexible connector of this utility model.

[0014] Figure 4 This is a schematic diagram of the installation and dismantling of the precast beam formwork of this utility model.

[0015] The markings in the image are as follows: 1-First channel steel, 2-Second channel steel, 3-Third channel steel, 4-Reinforcing bar, 5-Steel cable, 6-Horseshoe shackle, 7-Gantry crane, 8-Gantry crane hook, 9-Precast beam formwork column, 10-Precast beam formwork foot support, 11-Welding position one of the main components of the lifting tool, 12-Welding position two of the main components of the lifting tool, 13-Welding position three of the main components of the lifting tool, 14-Welding position four of the main components of the lifting tool. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments. Example 1

[0017] like Figure 1-3 As shown, a simple precast beam formwork lifting tool includes a main lifting tool component and flexible connecting components; The main member of the spreader comprises two first channel steels 1 arranged parallel to each other, a second channel steel 2 is jointly welded between the webs at both ends of the two first channel steels 1 respectively, a third channel steel 3 and a steel bar 4 are further welded between the webs of the two first channel steels 1 respectively, the distance between the third channel steel 3 and the steel bar 4 is 750mm, the distance between the third channel steel 3 and the second channel steel 2 at its adjacent end is 180mm, and the distance between the steel bar 4 and the second channel steel 2 at its adjacent end is 150mm; the opening directions of the second channel steel 2 and the third channel steel 3 are consistent; the gap between the third channel steel 3 and the second channel steel 2 at its adjacent end is used for sleeving the upright post of the precast beam formwork, and the steel bar 4 and the second channel steel 2 at its adjacent end are used for connecting the loop of the flexible connecting member and the horseshoe shackle 6; The flexible connecting member comprises a steel cable 5, loops are respectively formed at two ends of the steel cable 5, and a horseshoe shackle 6 is hung on the loop at one end.

[0018] Further, the first channel steel 1, the second channel steel 2 and the third channel steel 3 are all 12.6# channel steels, wherein the length of the first channel steel 1 is 1100mm, and the lengths of the second channel steel 2 and the third channel steel 3 are both 80mm.

[0019] Further, the steel bar 4 is an HRB400 Φ22 steel bar with a length of 8cm.

[0020] Further, the steel cable 5 is made of a steel wire rope with a diameter of Φ14mm and a length of 2m.

[0021] Further, the horseshoe shackle 6 is a 25t horseshoe lifting ring.

[0022] A simple precast beam formwork spreader is manufactured through the following process: (1) Main member of the spreader The main member of the spreader is made of: 2 pieces of 12.6# channel steel with a length of 110cm as the first channel steels 1, 3 pieces of 12.6# channel steel with a length of 8cm (two of which are used as the second channel steels 2, and one is used as the third channel steel 3), and 1 piece of HRB400 Φ22 steel bar with a length of 8cm, which are formed by welding and grinding burrs; ① Weld 3 pieces of 12.6# channel steel with a length of 8cm to the welding positions 11, 12 and 14 of one 12.6# channel steel with a length of 110cm — the main member of the spreader respectively; ② Weld 1 piece of HRB400 Φ22 steel bar with a length of 8cm to the welding position 13 of one 12.6# channel steel with a length of 110cm — the main member of the spreader; ③ After completing the above steps, align and attach the end of the other 12.6# channel steel with a length of 110cm to the end of the previous 12.6# channel steel with a length of 110cm, then follow Figure 2 the illustration to weld the other positions to form a "mesh"-shaped main member of the spreader, as shown in Figure 1 the illustration.

[0023] (2) Flexible connector The flexible connector is used to connect the main components of the lifting device and the gantry crane hook 8. It mainly uses Φ14mm steel wire rope with a length of 2m and a 25t horseshoe shackle, which is woven and looped to form the flexible connector. ① The flexible connector is woven using Φ14mm steel wire rope with a length of 2m: 15cm is broken off at each end, leaving 15cm to make a loop (140cm remains in the middle), and the end is woven into a steel rope to form a loop. This process is repeated to make the other end loop; ② One end of the loop of the steel rope of the flexible connector is hooked into the 25t horseshoe shackle, i.e., the horseshoe shackle 6.

[0024] After completing the above steps, the fabrication of the precast beam formwork installation and dismantling lifting equipment is finished. Hook one end of the flexible connector's steel rope loop into the gantry crane hook 8, add a 25t horseshoe shackle to the other end, and then slip it into the main component of the lifting equipment to complete the overall assembly of the lifting equipment.

[0025] The working process of using this lifting tool is as follows: A. Location Adjustment and Work Preparation Based on the specific location of the precast beam formwork for stacking and dismantling the lifting equipment, the operators move the gantry crane 7, lower its slings, put the loop of the flexible connector of the lifting equipment into the hook 8 of the gantry crane, raise the slings of the gantry crane, move the gantry crane 7 to move the lifting equipment to the position for installation and dismantling of the precast beam formwork, lower the slings of the gantry crane 7, and then put the "U"-shaped sleeve between the main component weld position 11 and the main component weld position 2 12 of the lifting equipment into the top of the column 9 of the precast beam formwork, thus completing the position adjustment of the lifting equipment and the preparation for work when installing and dismantling the formwork.

[0026] B. Template Installation After fitting the U-shaped sleeve of the main lifting device onto the top of the precast beam formwork column 9, the operator moves the gantry crane 7, retracts its slings, and moves the gantry crane 7 to lift the formwork to the installation position. The operator then adjusts the gantry crane 7's slings as needed to lower or retract them, completing the fine-tuning of the formwork installation. Next, the precast beam formwork foot supports 10 are adjusted into place, and the main lifting device is removed from the top of the precast beam formwork column, completing the installation of the first precast beam formwork. The above operation is repeated, and the bolts connecting the formwork are tightened to complete the installation of the other formwork sections.

[0027] C. Template disassembly (1) The demolding of the precast beam formwork is completed by loosening the bolts connecting the precast beam formwork and removing the foot support 10 of the precast beam formwork; (2) The operator moves the gantry crane and lowers its slings to move the lifting device to the demolding position of the precast beam; (3) The slings of the gantry crane 7 are lowered, and the "U"-shaped sleeve of the main component of the lifting device is put into the top of the precast beam formwork column; (4) The gantry crane 7 is operated to retract its slings, and the formwork can be lifted away from the precast beam platform; (5) The gantry crane slings are lowered appropriately to loosen the lifting device, and the "U"-shaped sleeve of the main component of the lifting device is removed from the top of the precast beam formwork column 9, thus completing the dismantling of the first precast beam formwork. Repeat the above operation to complete the dismantling of other formwork.

[0028] D. Complete the assignment After the precast beam formwork is installed and dismantled, the operator moves the gantry crane 7 to a designated tool storage area, lowers its slings, removes the loop of the flexible connector from the hook 8 of the gantry crane 7, raises the slings of the gantry crane 7, and moves the gantry crane 7 to the standby area to await the next use.

Claims

1. A simple precast beam formwork hoist, characterized in that, Includes the main components of the lifting gear and flexible connecting parts; The main component of the lifting device includes two parallel first channel steels (1). A second channel steel (2) is welded between the webs at both ends of the two first channel steels (1). A third channel steel (3) and a reinforcing bar (4) are also welded between the webs of the two first channel steels (1). The distance between the third channel steel (3) and the reinforcing bar (4) is 750mm. The distance between the third channel steel (3) and the second channel steel (2) at its adjacent end is 180mm. The distance between the reinforcing bar (4) and the second channel steel (2) at its adjacent end is 150mm. The openings of the second channel steel (2) and the third channel steel (3) face the same direction. The flexible connector includes a steel cable (5), with loops formed at both ends of the steel cable (5), and a horseshoe shackle (6) attached to one end of the loop.

2. The simplified precast beam formwork hoisting tool according to claim 1, characterized in that, The first channel steel (1), the second channel steel (2) and the third channel steel (3) are all 12.6# channel steel, wherein the length of the first channel steel (1) is 1100mm, and the lengths of the second channel steel (2) and the third channel steel (3) are both 80mm.

3. The simplified precast beam formwork hoisting tool according to claim 1, characterized in that, The steel bar (4) is an 8cm long HRB400Φ22 steel bar.

4. The simplified precast beam formwork hoisting tool according to claim 1, characterized in that, The steel cable (5) is made of Φ14mm steel wire rope with a length of 2m.

5. A simple precast beam formwork hoisting tool according to claim 1, characterized in that, The horseshoe shackle (6) is a 25t horseshoe shackle.

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