Device for adjusting steel truss girder pre-assembly elevation

Abstract

The utility model discloses a device for adjusting the pre-assembly elevation of a steel truss girder, which comprises a load-bearing steel plate arranged below a web member of the steel truss girder; the two ends of the bearing steel plate are rotationally connected with connecting steel plates, and the connecting steel plates can rotate to the position above the bearing steel plate and are detachably connected with steel truss web members. The jack is arranged at the bottom of the bearing steel plate and used for jacking the bearing steel plate; the length of the positioning device is adjustable; the positioning device is arranged at the bottom of the load-bearing steel plate, and after the jack jacks the load-bearing steel plate, the length of the positioning device is adjusted so as to support the load-bearing steel plate. The elevation of the steel truss girder can be adjusted by jacking the web member of the steel truss girder, the structure is simple, mounting and dismounting are convenient, the pre-splicing efficiency of the steel truss girder can be effectively improved, and the construction cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel truss girders. More specifically, the utility model relates to a device for adjusting the elevation during the pre-assembly of a steel truss girder. Background Art

[0002] Steel girders are widely used in bridge construction. When a steel truss girder is pre-assembled in a factory, it is necessary to perform pre-assembly. When the steel truss girder is divided into upper and lower layers for pre-assembly at the position of the web members, there is no suitable fulcrum for jacking to adjust the elevation. Therefore, to solve the above problems, it is necessary to provide a device for adjusting the elevation during the pre-assembly of a steel truss girder, which can achieve elevation adjustment without high-altitude operation, and has a light structure and is easy to construct. Summary of the Utility Model

[0003] An object of the utility model is to solve at least the above problems and provide at least the advantages described later.

[0004] To achieve these and other advantages in accordance with the present utility model, there is provided a device for adjusting the elevation during the pre-assembly of a steel truss girder, comprising:

[0005] A load-bearing steel plate, which is arranged below the web member of the steel truss girder; both ends of the load-bearing steel plate are rotatably connected with connecting steel plates, and the connecting steel plates can be rotated above the load-bearing steel plate and are detachably connected with the web member of the steel truss girder;

[0006] A jack, which is arranged at the bottom of the load-bearing steel plate for jacking up the load-bearing steel plate;

[0007] A positioning device, whose length is adjustable; the positioning device is arranged at the bottom of the load-bearing steel plate, and after the jack jacks up the load-bearing steel plate, the length of the positioning device is adjusted to support the load-bearing steel plate.

[0008] Preferably, the connecting steel plate is connected with the web member of the steel truss girder by drift pins.

[0009] Preferably, connecting ear plates A are arranged on both sides of the top surface of the load-bearing steel plate, and a connecting ear plate B is arranged at one end of the connecting steel plate, and the connecting ear plate A and the connecting ear plate B are hinged.

[0010] Preferably, when the two connecting steel plates are simultaneously rotated above the load-bearing steel plate and are in a vertical state, they are exactly located on both sides of the web member of the steel truss girder.

[0011] Preferably, the positioning device comprises a small square tube, a large square tube sleeved on the outer periphery of the small square tube and a plug rod. A plurality of through holes are symmetrically arranged in the vertical direction on two opposite side surfaces of the large square tube, and one end of the plug rod passes through the through holes at the same height on two side surfaces of the large square tube in sequence and supports at the bottom of the small square tube.

[0012] Preferably, two inserting rods are provided, and two rows of the through holes are symmetrically formed in two opposite side surfaces of the large square tube in the vertical direction.

[0013] Preferably, the jack is arranged in the small square tube, the two inserting rods are arranged on both sides of the jack, a top plate is fixedly arranged at the top of the small square tube, and the top plate abuts against the bottom surface of the load-bearing steel plate.

[0014] The utility model has at least the following beneficial effects:

[0015] The device for adjusting the elevation during the pre-assembly of the steel truss girder provided by the utility model is installed at the web member of the steel truss girder. By jacking up the web member of the steel truss girder to adjust the elevation of the steel truss girder, there is no need for high-altitude operation during the adjustment process, and the problem that there is no suitable fulcrum for jacking and adjusting the elevation when the steel truss girder is pre-assembled in upper and lower layers at the web member position in the prior art is solved. The device for adjusting the elevation during the pre-assembly of the steel truss girder has a simple structure, is convenient to install and disassemble, can effectively improve the pre-assembly efficiency of the steel truss girder, and saves the construction cost.

[0016] Other advantages, objectives and features of the utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the device for adjusting the elevation during the pre-assembly of the steel truss girder when the connecting steel plate is connected to the web member of the steel truss girder;

[0018] Figure 2 is a schematic structural view of the device for adjusting the elevation during the pre-assembly of the steel truss girder when the connecting steel plate is located on both sides of the load-bearing steel plate;

[0019] Figure 3 is a schematic structural view of the load-bearing steel plate of the utility model;

[0020] Figure 4 is a schematic structural view of the connecting steel plate of the utility model;

[0021] Description of reference numerals: 1 - steel truss girder covering, 2 - connecting steel plate, 21 - connecting ear plate B, 3 - drift pin, 4 - load-bearing steel plate, 41 - connecting ear plate A, 5 - jack, 6 - large square tube, 7 - inserting rod, 8 - small square tube, 9 - top plate; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further detailed description of the utility model is provided in conjunction with the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0023] It should be noted that the experimental methods described in the following implementation schemes are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by terms such as "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] As Figure 1 and Figure 2 shown, the present invention provides a device for adjusting the elevation of pre-assembled steel truss girders, including:

[0025] A load-bearing steel plate 4, which is arranged below the web member 1 of the steel truss girder; both ends of the load-bearing steel plate 4 are rotatably connected with connecting steel plates 2, and the connecting steel plates 2 can be rotated above the load-bearing steel plate 4 and detachably connected with the web member 1 of the steel truss girder;

[0026] A jack 5, which is arranged at the bottom of the load-bearing steel plate 4 for jacking up the load-bearing steel plate 4;

[0027] A positioning device, whose length is adjustable; the positioning device is arranged at the bottom of the load-bearing steel plate 4. After the jack 5 jacks up the load-bearing steel plate 4, the length of the positioning device is adjusted to support the load-bearing steel plate 4.

[0028] In this technical solution, the load-bearing steel plate 4 and the web member 1 of the steel truss girder are connected as a whole through the connecting steel plate 2. When the jack 5 jacks up the load-bearing steel plate 4, the purpose of adjusting the pre-assembled elevation of the steel truss girder is achieved. When the steel truss girder reaches the designed elevation, the length of the positioning device is adjusted to support the load-bearing steel plate 4 and the web member 1 of the steel truss girder, ensuring the stability of the steel truss girder. In the above process, there is no need for high-altitude operation, and the elevation adjustment of the pre-assembled steel truss girder can be realized only by installing the device at the web member 1 of the steel truss girder; it solves the problem in the prior art that when the steel truss girder is pre-assembled in upper and lower layers at the web member position, there is no suitable fulcrum for jacking and adjusting the elevation. When the elevation adjustment is not required, the connecting steel plates 2 on both sides are rotated to both sides of the load-bearing steel plate 4, which can shorten the longitudinal dimension of the whole device and is convenient for loading and moving.

[0029] In another technical solution, the connecting steel plate 2 is connected with the web member 1 of the steel truss girder through a drift pin 3 to realize the detachable connection between the connecting steel plate 2 and the web member 1 of the steel truss girder, and the installation and disassembly efficiency is high; the connecting steel plate 2 and the web member 1 of the steel truss girder can also adopt other forms of detachable connection.

[0030] In another technical solution, such as Figure 3 and Figure 4 shown, on both sides of the top surface of the load-bearing steel plate 4, there are connecting ear plates A provided. One end of the connecting steel plate 2 is provided with a connecting ear plate B. The connecting ear plate A and the connecting ear plate B are hinged. The connecting ear plate A is a male hinge head, and the connecting ear plate B is a female hinge head. The two are hinged together to realize the rotation of the connecting steel plate 2 relative to the load-bearing steel plate 4.

[0031] Furthermore, when the two connecting steel plates 2 are simultaneously rotated above the load-bearing steel plate 4 and in a vertical state, they are exactly located on both sides of the steel truss girder web member 1. The two connecting steel plates 2 on both sides sandwich the steel truss girder web member 1 between them, ensuring the stability of the steel truss girder during the jacking process of the jack 5.

[0032] In another technical solution, the positioning device includes a small square tube 8, a large square tube 6 sleeved on the outer periphery of the small square tube 8, and a plug rod 7. On two opposite side surfaces of the large square tube 6, a plurality of through holes are symmetrically opened in the vertical direction. One end of the plug rod 7 sequentially passes through the through holes at the same height on the two side surfaces of the large square tube and supports on the bottom of the small square tube 8. By moving the small square tube 8 relative to the large square tube 6 in the vertical direction, the length of the positioning device is adjusted. When the jack 5 jacks the steel truss girder to the designed elevation, the length of the positioning device is adjusted, and then the plug rod 7 is inserted into the corresponding through hole to support the small square tube 8, so that the small square tube 8 supports the load-bearing steel plate 3 and the steel truss girder web member 1.

[0033] To further improve the stability of the positioning device, the plug rod 7 is provided with two, and two rows of the through holes are symmetrically opened in the vertical direction on two opposite side surfaces of the large square tube 6.

[0034] In another technical solution, the jack 5 is arranged inside the small square tube 8. The two plug rods 7 are arranged on both sides of the jack 5. The top of the small square tube 8 is fixedly provided with a top plate 9. The top plate 9 abuts against the bottom surface of the load-bearing steel plate 4. During the upward jacking process of the jack 5, the small square tube 8 is driven to move upward through the top plate 9, and then the load-bearing steel plate 4 is jacked up. When it is jacked up to the designed elevation of the steel truss girder, the two plug rods 7 are inserted into the corresponding through holes to support the small square tube 8, achieving the positioning effect.

[0035] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples herein.

Claims

1. A device for adjusting the elevation of pre-assembly of steel trusses, characterized in that: include: A load-bearing steel plate is arranged below the web of the steel truss; both ends of the load-bearing steel plate are rotatably connected with connecting steel plates, and the connecting steel plates can be rotated to the top of the load-bearing steel plate and detachably connected to the web of the steel truss; A jack, which is arranged at the bottom of the load-bearing steel plate and is used to lift the load-bearing steel plate; A positioning device, the length of which is adjustable; The positioning device is arranged at the bottom of the load-bearing steel plate. After the load-bearing steel plate is lifted by the jack, the length of the positioning device is adjusted to support the load-bearing steel plate.

2. The device for adjusting the elevation of pre-assembly of steel trusses according to claim 1, characterized in that: The connecting steel plate is connected to the steel truss web by means of punching nails.

3. The device for adjusting the elevation of pre-assembly of steel trusses according to claim 1, characterized in that: Connecting ear plates A are arranged on both sides of the top surface of the load-bearing steel plate, and a connecting ear plate B is arranged at one end of the connecting steel plate. The connecting ear plate A and the connecting ear plate B are hinged.

4. The device for adjusting the elevation of pre-assembly of steel trusses according to claim 3, characterized in that: When the two connecting steel plates are simultaneously rotated to the top of the load-bearing steel plate and are in a vertical state, they are located exactly on both sides of the web of the steel truss.

5. The device for adjusting the elevation of pre-assembly of steel trusses according to claim 1, characterized in that: The positioning device includes a small square tube, a large square tube sleeved on the outer circumference of the small square tube, and an insertion rod. A plurality of through holes are symmetrically opened in the vertical direction on two opposite sides of the large square tube. One end of the insertion rod passes through the through holes at the same height on the two sides of the large square tube in sequence and is supported on the bottom of the small square tube.

6. The device for adjusting the elevation of pre-assembly of steel trusses according to claim 5, characterized in that: The number of the insertion rods is two, and two rows of through holes are symmetrically provided on two opposite sides of the large square tube in the vertical direction.

7. The device for adjusting the elevation of pre-assembly of steel trusses according to claim 5, characterized in that: The jack is arranged in the small square tube, the two insertion rods are arranged on both sides of the jack, a top plate is fixedly arranged on the top of the small square tube, and the top plate abuts against the bottom surface of the load-bearing steel plate.

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