Lifting appliance for box girder formwork assembly

Abstract

The utility model relates to the field of bridge construction, in particular to a lifting appliance for splicing box girder templates, which comprises a frame body, the frame body is provided with a lifting component, a support component, a limiting cross rod and an abutting beam, the lifting component is positioned at the top of the frame body, the abutting beam is positioned at the bottom of the frame body, and the support component and the abutting beam are arranged at an interval; the supporting component is used for abutting against a formwork cross beam, and the limiting cross rod and the abutting beam are used for abutting against the two sides of a formwork vertical beam correspondingly. The hoisting component and the supporting component are arranged in a staggered mode, and the supporting component is detachably connected with the limiting cross rod; the frame body is used for carrying out oblique crossing hoisting on the prefabricated box girder formwork, operation is easy, the assembling qualification rate of the prefabricated box girder formwork is high, the construction efficiency is improved, and the construction cost is reduced; the frame body can be quickly mounted and dismounted on the formwork, turnover time consumption is low, the situation that the angle of the formwork is manually adjusted in the hoisting process is avoided, and construction safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and in particular to a lifting device for assembling box girder formwork. Background Technology

[0002] The superstructure of the bridge adopts a prefabricated small box girder oblique arrangement. The prefabricated small box girder oblique arrangement has two forms with inclination angles of 15° and 30°. The transverse diaphragms of the prefabricated small box girder are in the orthogonal direction. During construction, there are many box girder formwork splices, and the overall dimensional accuracy requirements are high. The back of the prefabricated small box girder formwork is equipped with formwork cross beams and formwork longitudinal beams. The formwork cross beams and formwork longitudinal beams are connected to form an H-shaped frame.

[0003] However, the current method for installing precast box girder formwork is to use a segmented splicing method, which is completed manually with the help of wire rope hoisting. The formwork is hoisted by connecting the wire rope to the formwork's horizontal beams or longitudinal beams. This method is time-consuming, has large deviations, and is prone to detachment during hoisting, which can cause damage to personnel or equipment. It is also not convenient for splicing and hoisting oblique box girder formwork that has a high turnover rate. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of existing technologies where oblique box girder formwork is inconvenient to hoist, and to provide a hoisting tool for assembling box girder formwork.

[0005] This utility model provides a lifting tool for assembling box girder formwork, including...

[0006] The frame includes a hoisting component, a supporting component, a limiting crossbar, and an abutment beam. The hoisting component is located at the top of the frame, the abutment beam is located at the bottom of the frame, and the supporting component is located between the abutment beam and the hoisting component. The supporting component is detachably connected to the limiting crossbar.

[0007] The limiting crossbar and the abutment beam are spaced apart to form a limiting space for holding the template vertical beam, and the supporting member is used to abut the bottom of the template crossbeam; the hoisting member and the abutment beam are staggered in the vertical direction.

[0008] This utility model discloses a lifting device for assembling box girder formwork. By staggering the lifting components and abutment beams on the frame, the precast box girder formwork can be lifted at an angle, facilitating oblique installation. Supporting components abut against the bottom of the formwork crossbeams, supporting the precast box girder formwork. Limiting crossbars and abutment beams abut against both sides of the formwork vertical beams, clamping the vertical beams. Under the combined action of the supporting components, limiting crossbars, and abutment beams, the precast box girder formwork is clamped and fixed. The limiting crossbars are detachably connected to the supporting components, facilitating connection and disassembly between the frame and the box girder formwork. Using this lifting device for box girder formwork assembly prevents the formwork from detaching during lifting, allowing the formwork to be lifted at a specified angle, achieving rapid installation and disassembly, and facilitating the reuse of the box girder formwork.

[0009] Preferably, the frame includes a connecting rod, a first L-shaped structural member, and a second L-shaped structural member, the first L-shaped structural member and the second L-shaped structural member being spaced apart, one end of the connecting rod being connected to the first L-shaped structural member and the other end being connected to the second L-shaped structural member; the hoisting component includes two oppositely arranged hoisting plates, the first L-shaped structural member and the second L-shaped structural member being respectively connected to the hoisting plates; the first L-shaped structural member is connected to the abutment beam, and the second L-shaped structural member is connected to the abutment beam; the supporting component includes a first support plate and a second support plate, the first support plate and the second support plate being respectively connected to the connecting rod, the limiting crossbar being connected to the first support plate, and the limiting crossbar being connected to the second support plate.

[0010] The frame consists of connecting rods, a first L-shaped structural member, and a second L-shaped structural member. This frame structure reduces the overall weight of the frame, facilitating hoisting. Each of the first and second L-shaped structural members is equipped with a hoisting plate. During hoisting, the hoisting equipment simultaneously connects to the hoisting plates of both members, ensuring force balance and safety. The first and second support plates increase the support area for the formwork beams, ensuring the stability of the box girder formwork during hoisting. The first and second L-shaped structural members are connected to the abutment beam, enhancing their connection strength. During hoisting, the abutment beam and the limiting crossbar abut against both sides of the formwork vertical beam, restricting the relative position of the frame and the formwork, thus preventing the box girder formwork from falling during hoisting. The limiting crossbar passes through the first and second support plates, increasing its load-bearing capacity and ensuring the stability of the box girder formwork during hoisting.

[0011] Preferably, the first L-shaped structural member is provided with a reinforcing beam, one end of which is connected to the end of the first L-shaped structural member away from the abutment beam, and the other end is connected to the end of the second L-shaped structural member away from the abutment beam.

[0012] The reinforcing beam can strengthen the connection between the first L-shaped structural component and the second L-shaped structural component. The reinforcing beam can prevent the frame from deforming after hoisting and stress, thus ensuring the structural strength of the frame.

[0013] Preferably, the length of the limiting crossbar is greater than the spacing between adjacent template vertical beams; the spacing between the first support plate and the second support plate is less than the spacing between adjacent template vertical beams; and the length of the abutting beam is greater than the spacing between adjacent template vertical beams.

[0014] During the hoisting process, the limiting crossbars and the abutment beams can clamp the adjacent formwork vertical beams, improving the stability of the hoisted box girder formwork.

[0015] Preferably, the connecting rod passes through the first support plate and the second support plate, and the first support plate and / or the second support plate are slidably connected to the connecting rod.

[0016] The first and second support plates are slidably connected. By adjusting the distance between the first and second support plates, the frame becomes more adaptable and can be used for hoisting box girder formwork of different specifications.

[0017] Preferably, both the first L-shaped structural member and the second L-shaped structural member include a lifting beam and a lifting vertical beam. The end of the lifting beam is connected to the end of the lifting vertical beam. The lifting component is connected to the lifting beam. The abutment beam is connected to the lifting vertical beam. The two ends of the connecting rod are respectively connected to the lifting vertical beam.

[0018] The lifting components are set on the horizontal beam of the lifting device, and the connecting rod is connected to the vertical beam of the lifting device, so that the lifting components and the supporting components are misaligned in the vertical direction, allowing the box girder formwork to tilt at a certain angle after being lifted, which facilitates the oblique installation of the box girder formwork.

[0019] Preferably, the lifting beam is provided with a reinforcing angle iron, which is connected to the lifting beam.

[0020] Strengthening the connection between the horizontal and vertical beams of the lifting device by reinforcing the angle iron can prevent deformation at the corners of the frame.

[0021] Preferably, a reinforcing beam is provided on the vertical beam of the lifting device, and the top of the reinforcing beam is aligned with the horizontal beam of the lifting device.

[0022] The reinforcement beam enhances the structural strength of the lifting tool's vertical beam, preventing deformation under stress.

[0023] Preferably, the lifting plate has a plurality of lifting holes arranged along the length of the lifting beam.

[0024] By connecting the hoisting equipment to hoisting holes at different locations, the tilt angle of the formwork after hoisting can be adjusted, thus facilitating the oblique installation of the formwork at a specified angle.

[0025] Preferably, the first support plate has a first through hole, and the second support plate has a second through hole, and the limiting crossbar can be adapted to pass through the first through hole and the second through hole respectively.

[0026] By having the limiting crossbar pass through both the first and second through holes, the limiting crossbar is firmly connected to the first support plate and the second support plate, thereby increasing the stress points of the limiting crossbar, improving its strength, and ensuring the stability of the formwork hoisting.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] 1. This utility model provides a lifting device for assembling box girder formwork. By staggering the lifting components and abutment beams on the frame, the precast box girder formwork can be lifted at an angle, facilitating oblique installation. Supporting components abut against the bottom of the formwork crossbeams, supporting the precast box girder formwork. Limiting crossbars and abutment beams abut against both sides of the formwork vertical beams, clamping the formwork vertical beams. Under the combined action of the supporting components, limiting crossbars, and abutment beams, the precast box girder formwork is clamped and fixed. The limiting crossbars are detachably connected to the supporting components, facilitating connection and disassembly between the frame and the box girder formwork. Using a lifting device for assembling box girder formwork on the frame prevents the formwork from detaching during lifting, allowing the formwork to be lifted at a specified angle, achieving rapid installation and disassembly, and facilitating the reuse of the box girder formwork.

[0029] 2. This utility model provides a lifting device for assembling box girder formwork. It has a reasonable structure and uses a frame to hoist precast box girder formwork at an oblique angle. The operation is simple, the assembly qualification rate of precast box girder formwork is high, the construction efficiency is improved, and the construction cost is reduced. The frame can be quickly installed and disassembled on the formwork, with less turnover time. It avoids the need for manual adjustment of the formwork angle during hoisting, improves construction safety, and has good economic and practical value. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of a lifting device for assembling box girder formwork according to the present invention;

[0031] Figure 2This is a front view structural diagram of a lifting device for assembling box girder formwork according to the present invention;

[0032] Figure 3 This is a structural schematic diagram of the support component of this utility model;

[0033] Figure 4 This is a schematic diagram illustrating the usage of a lifting device for assembling box girder formwork, which is a utility model.

[0034] Marked in the image:

[0035] 1-Frame, 11-First L-shaped structural component, 12-Second L-shaped structural component, 101-Lifting tool horizontal beam, 102-Lifting tool vertical beam, 103-Reinforcing angle iron, 13-Connecting rod, 2-Lifting component, 21-Lifting plate, 3-Supporting component, 31-First support plate, 32-Second support plate, 33-First through hole, 34-Second through hole, 4-Limiting horizontal bar, 5-Abutting beam, 6-Reinforcing horizontal beam, 7-Strengthening beam, 8-Connecting vertical beam, 1000-Formwork vertical beam, 1001-Formwork horizontal beam. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0037] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0039] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing between identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0040] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0041] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0042] Example 1

[0043] like Figures 1-4 As shown, a lifting device for assembling box girder formwork includes...

[0044] The frame 1 is provided with a hoisting component 2, a support component 3, a limiting crossbar 4 and an abutment beam 5. The hoisting component 2 is located at the top of the frame 1, the abutment beam 5 is located at the bottom of the frame 1, the support component 3 is located between the abutment beam 5 and the hoisting component 2, and the support component 3 is detachably connected to the limiting crossbar 4.

[0045] The limiting crossbar 4 and the abutting beam 5 are spaced apart to form a limiting space for holding the template vertical beam 1000. The supporting member 3 is used to abut the bottom of the template horizontal beam 1001. The hoisting member 2 and the abutting beam 5 are staggered in the vertical direction.

[0046] By staggering the lifting components 2 and the abutment beam 5 on the frame 1, the precast box girder formwork can be lifted at an angle, facilitating its oblique installation. The support component 3 abuts against the bottom of the formwork crossbeam 1001, supporting the precast box girder formwork. The limiting crossbeam 4 and the abutment beam 5 abut against both sides of the formwork vertical beam 1000, clamping the formwork vertical beam 1000. Under the combined action of the support component 3, the limiting crossbeam 4, and the abutment beam 5, the precast box girder formwork is clamped and fixed. The limiting crossbeam 4 is detachably connected to the support component 3, facilitating the connection and disassembly of the frame 1 and the box girder formwork. The lifting device used on the frame 1 for assembling the box girder formwork prevents the formwork from detaching during lifting, allowing the box girder formwork to be lifted at a specified angle, achieving rapid installation and disassembly of the box girder formwork, and facilitating its reuse.

[0047] In one or more embodiments, the frame 1 is composed of a connecting rod 13, a first L-shaped structural member 11, and a second L-shaped structural member 12. The first L-shaped structural member 11 and the second L-shaped structural member 12 are spaced apart to ensure the structural strength of the frame 1 and reduce its overall weight. One end of the connecting rod 13 is connected to the first L-shaped structural member 11, and the other end is connected to the second L-shaped structural member 12. The connecting rod 13 connects the first L-shaped structural member 11 and the second L-shaped structural member 12 together, ensuring the box girder formwork is balanced under force during hoisting. The hoisting component 2 is composed of two opposing hoisting plates 21. Hoisting plates 21 are respectively connected to the first L-shaped structural member 11 and the second L-shaped structural member 12. When hoisting the box girder formwork, the hoisting equipment simultaneously connects to the hoisting plates 21 on the first L-shaped structural member 11 and the second L-shaped structural member 12 for hoisting. Plate 21 ensures the stability of the hoisted box girder formwork by increasing the stress points; the first L-shaped structural member 11 is connected to the abutment beam 5, and the second L-shaped structural member 12 is connected to the abutment beam 5. The abutment beam 5 is used to abut against the outside of the formwork vertical beam 1000; the support member 3 is composed of the first support plate 31 and the second support plate 32. The first support plate 31 and the second support plate 32 are respectively connected to the connecting rod 13. The first support plate 31 and the second support plate 32 are located on the same horizontal plane, so that the first support plate 31 and the second support plate 32 can abut against the formwork horizontal beam 1001 at the same time, thereby forming good support for the formwork horizontal beam 1001. The limiting horizontal bar 4 is connected to the first support plate 31 and the limiting horizontal bar 4 is connected to the second support plate 32, so that the limiting horizontal bar 4 abuts against the inside of the hoisting vertical beam 102. Under the combined action of the abutment beam 5, the limiting horizontal bar 4 and the support member, under the action of gravity, the box girder formwork is difficult to separate from the frame 1.

[0048] In optional embodiments, to prevent the frame 1 from deforming under stress, a reinforcing beam 6 is provided on the first L-shaped structural member 11. One end of the reinforcing beam 6 is connected to the end of the first L-shaped structural member 11 away from the abutment beam 5, and the other end is connected to the end of the second L-shaped structural member 12 away from the abutment beam 5, so as to prevent the end of the frame 1 away from the abutment beam 5 from deforming during hoisting. In some embodiments, a reinforcing beam 7 is provided at the corner of the first L-shaped structural member 11. The reinforcing beam 7 is connected to the corner of the second L-shaped structural member 12. A vertical connecting beam 8 is provided on the reinforcing beam 7. One end of the connecting beam 8 is connected to the reinforcing beam 7, and the other end is connected to the connecting rod 13.

[0049] In an optional embodiment, the length of the limiting crossbar 4 is greater than the spacing between adjacent template vertical beams 1000, so that the limiting crossbar can simultaneously abut against the adjacent template vertical beams 1000 of the box girder template; the spacing between the first support plate 31 and the second support plate 32 is less than the spacing between adjacent template vertical beams 1000, so that the first support plate 31 and the second support plate 32 can be placed in the empty area between adjacent template vertical beams 1000, facilitating the connection of the limiting crossbar 4 to the first support plate 31 and the second support plate 32; the length of the abutting beam 5 is greater than the spacing between adjacent template vertical beams 1000, so that the limiting abutting beam 5 can simultaneously abut against the adjacent template vertical beams 1000 of the box girder template.

[0050] In an optional embodiment, the connecting rod 13 passes through the first support plate 31 and the second support plate 32. The first support plate 31 and / or the second support plate 32 are slidably connected to the connecting rod 13, thereby adjusting the distance between the first support plate 31 and the second support plate 32. This facilitates the adjustment of the stress point of the template beam 1001, enabling the frame 1 to adapt to the hoisting of box girder templates of different specifications.

[0051] In an optional embodiment, both the first L-shaped structural member 11 and the second L-shaped structural member 12 include a lifting beam 101 and a lifting vertical beam 102. The end of the lifting beam 101 is connected to the end of the lifting vertical beam 102. The lifting component 2 is connected to the lifting beam 101, the abutment beam 5 is connected to the lifting vertical beam 102, and the two ends of the connecting rod 13 are respectively connected to the lifting vertical beam 102. The lifting component 2 is set on the lifting beam 101, and the connecting rod 13 is connected to the lifting vertical beam 102, so that the lifting component 2 and the supporting component 3 are misaligned in the vertical direction, so that the box girder formwork can be tilted at a certain angle after being lifted, which facilitates the oblique installation of the box girder formwork.

[0052] In an optional embodiment, the lifting beam 101 is provided with a reinforcing angle iron 103, which is connected to the lifting beam 102. Since the force is large at the connection between the lifting beam 101 and the lifting beam 102, in order to prevent deformation at the connection between the lifting beam 101 and the lifting beam 102, a reinforcing angle iron 103 is provided at the connection between the lifting beam 101 and the lifting beam 102 to enhance the connection strength.

[0053] In an optional embodiment, a reinforcing beam is provided on the vertical beam 102 of the lifting device, and the top of the reinforcing beam is aligned with the horizontal beam 101 of the lifting device; the reinforcing beam is provided along the length direction of the vertical beam 102 of the lifting device to enhance the structural strength of the vertical beam 102 of the lifting device.

[0054] In an optional embodiment, the lifting plate 21 is provided with a plurality of lifting holes, which are arranged along the length of the lifting beam 101; the end of the lifting plate 21 is aligned with the end of the lifting beam 101, and the lifting holes at different positions are connected by the lifting equipment to adjust the tilt angle of the box girder formwork.

[0055] In an optional embodiment, a first through hole 33 is provided on the first support plate 31, and a second through hole 34 is provided on the second support plate 32. The limiting crossbar 4 can be adapted to pass through the first through hole 33 and the second through hole 34 respectively. The first through hole 33 and the second through hole 34 make it easy to install and disassemble the limiting crossbar 4, make the limiting crossbar 4 firmly connected to the first support plate 31, make the limiting crossbar 4 firmly connected to the second support plate 32, increase the stress point of the limiting crossbar 4, improve the stress strength of the limiting crossbar 4, and ensure the stability of the box girder formwork hoisting.

[0056] Specifically, the through hole can be a square hole or a round hole. Multiple through holes can be opened in the first support plate 31 and multiple through holes can be opened in the second support plate 32.

[0057] Specifically:

[0058] The first L-shaped structural component 11 and the second L-shaped structural component 12 are both welded into an L-shape using 0.1m×0.1m Q355E square steel pipes, with an effective length of 1.2-2.38m, serving as the skeleton of the new type of lifting device;

[0059] The abutment beam 5 is made of 0.1m×0.1m Q355E square steel pipe welded to the bottom of the lifting tool pole, with an effective length of 2.29m. The two ends of the abutment beam 5 extend beyond the first L-shaped structural member 11 and the second L-shaped structural member 120.155m respectively. The abutment beam 5 resists the inward force of the box girder formwork during hoisting.

[0060] The connecting rod 13 is welded from 0.1m×0.1m Q355E square steel pipe, with an effective length of 0.78m.

[0061] The reinforcement beams are made of No. 12 I-beams, which are installed on the vertical beams 102 of the lifting device to prevent deformation of the vertical beams 102. The effective length is 1.6m, the connection method is full welding, and the weld height is 3mm.

[0062] The reinforcing angle iron 103 consists of two unequal-sided triangular Q235B steel plates welded to the top corners of the first L-shaped structural component 11 and the second L-shaped structural component 12, respectively. The steel plate thickness is 2.5 cm, and the dimensions of the unequal-sided triangular steel plates are 0.29 m × 0.29 m × 0.41 m to enhance the stability of the top corners of the first L-shaped structural component 11 and the second L-shaped structural component 12.

[0063] Lifting plate 21, consisting of 0.1m×0.6m×2.5cm Q235B strip steel plates, is welded to the ends of the first L-shaped structural component 11 or the second L-shaped structural component 12. Lifting holes with a diameter of 5cm are provided in the strip steel plates, with a spacing of 0.1m.

[0064] The first support plate 31 and the second support plate 32 are both made of two 0.5m×0.2m×2.5cm Q235B strip steel plates, and the first support plate 31 and the second support plate 32 are both connected to the connecting rod 13;

[0065] The limiting crossbar 4 is made of a 5cm x 5cm square steel tube inserted into a square steel. The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lifting device for assembling box girder formwork, characterized in that, include The frame (1) is provided with a hoisting component (2), a support component (3), a limiting crossbar (4) and an abutment beam (5). The hoisting component (2) is located at the top of the frame (1), the abutment beam (5) is located at the bottom of the frame (1), the support component (3) is located between the abutment beam (5) and the hoisting component (2), and the support component (3) is detachably connected to the limiting crossbar (4). The limiting crossbar (4) and the abutting beam (5) are spaced apart to form a limiting space for holding the template vertical beam (1000), and the supporting member (3) is used to abut the bottom of the template cross beam (1001); the hoisting member (2) and the abutting beam (5) are staggered in the vertical direction.

2. The lifting device for assembling box girder formwork according to claim 1, characterized in that, The frame (1) includes a connecting rod (13), a first L-shaped structural member (11), and a second L-shaped structural member (12). The first L-shaped structural member (11) and the second L-shaped structural member (12) are spaced apart. One end of the connecting rod (13) is connected to the first L-shaped structural member (11), and the other end is connected to the second L-shaped structural member (12). The hoisting component (2) includes two oppositely arranged hoisting plates (21). The first L-shaped structural member (11) and the second L-shaped structural member (12) are respectively connected to... The hoisting plate (21) is connected; the first L-shaped structural member (11) is connected to the abutment beam (5), and the second L-shaped structural member (12) is connected to the abutment beam (5); the supporting member (3) includes a first supporting plate (31) and a second supporting plate (32), the first supporting plate (31) and the second supporting plate (32) are respectively connected to the connecting rod (13), the limiting crossbar (4) is connected to the first supporting plate (31), and the limiting crossbar (4) is connected to the second supporting plate (32).

3. A lifting device for assembling box girder formwork according to claim 2, characterized in that, The first L-shaped structural member (11) is provided with a reinforcing beam (6). One end of the reinforcing beam (6) is connected to the end of the first L-shaped structural member (11) away from the abutting beam (5), and the other end is connected to the end of the second L-shaped structural member (12) away from the abutting beam (5).

4. A lifting device for assembling box girder formwork according to claim 2, characterized in that, The length of the limiting crossbar (4) is greater than the spacing between adjacent template vertical beams (1000); the spacing between the first support plate (31) and the second support plate (32) is less than the spacing between adjacent template vertical beams (1000); the length of the abutting beam (5) is greater than the spacing between adjacent template vertical beams (1000).

5. A lifting device for assembling box girder formwork according to claim 2, characterized in that, The connecting rod (13) passes through the first support plate (31) and the connecting rod (13) passes through the second support plate (32). The first support plate (31) and / or the second support plate (32) are slidably connected to the connecting rod (13).

6. A lifting device for assembling box girder formwork according to claim 2, characterized in that, Both the first L-shaped structural member (11) and the second L-shaped structural member (12) include a lifting beam (101) and a lifting vertical beam (102). The end of the lifting beam (101) is connected to the end of the lifting vertical beam (102). The lifting component (2) is connected to the lifting beam (101). The abutment beam (5) is connected to the lifting vertical beam (102). The two ends of the connecting rod (13) are respectively connected to the lifting vertical beam (102).

7. A lifting device for assembling box girder formwork according to claim 6, characterized in that, The lifting beam (101) is provided with a reinforcing angle iron (103), which is connected to the lifting vertical beam (102).

8. A lifting device for assembling box girder formwork according to claim 6, characterized in that, A reinforcing beam is provided on the vertical beam (102) of the lifting device, and the top of the reinforcing beam is aligned with the horizontal beam (101) of the lifting device.

9. A lifting device for assembling box girder formwork according to claim 6, characterized in that, The lifting plate (21) has a plurality of lifting holes arranged along the length of the lifting beam (101).

10. A lifting device for assembling box girder formwork according to any one of claims 2-8, characterized in that, The first support plate (31) has a first through hole (33), and the second support plate (32) has a second through hole (34). The limiting crossbar (4) can be adapted to pass through the first through hole (33) and the second through hole (34) respectively.

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