A steel box girder jig assembling and positioning auxiliary device

Abstract

This utility model provides an assembly and positioning auxiliary device for a steel box girder jig, relating to the technical field of steel box girder jigs. It includes a jig body supporting the steel box girder body. Fixed plates are symmetrically arranged on the left and right sides of the jig body. Lifting components are mounted on the fixed plates, with a lifting seat at the upper end of the lifting components. A sliding groove is provided on the upper surface of the lifting seat, and several adjusting blocks are arranged within the groove. A lateral jack is mounted on the upper end of each adjusting block. The output ends of the lateral jacks on the left and right sides are positioned opposite each other, and positioning blocks are mounted on the output ends of the lateral jacks. In this utility model, the cooperation of the lateral jacks and positioning blocks forms rigid limits on the left and right sides of the steel box girder body, effectively restricting the lateral movement of the steel box girder body on the jig body. This prevents the steel box girder body from sliding or shifting on the jig body, ensuring that the steel box girder body remains in the preset position during assembly and improving the positioning accuracy of the steel box girder body.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder jig technology, and in particular to an assembly and positioning auxiliary device for steel box girder jigs. Background Technology

[0002] A steel box girder formwork is a construction facility used to support and fix steel box girders. Its main purpose is to ensure the stability and precision of the steel box girders during assembly and welding. Steel box girder formwork features structural stability, high load-bearing capacity, and good adjustability.

[0003] Chinese Patent CN223118877U discloses a jig device for pre-assembling steel box girders, including a support mechanism and multiple adjustment components. The support mechanism includes multiple support members, multiple first connecting members, and multiple second connecting members. The support members are arranged in a rectangular array on a first plane. The first connecting members are connected to two adjacent support members along a first direction, and the second connecting members are connected to two adjacent support members along a second direction. The multiple adjustment components are arranged one-to-one with the support members. Each adjustment component includes a sleeve and a screw threaded to one end of the sleeve. The sleeve is adjustable along a third direction on the support member, and the screw is exposed on the support member and can move relative to the sleeve along a third direction under tightening force to support the pre-assembled steel box girder. This solution provides stable support to the steel box girder through the support mechanism and achieves precise adjustment of the elevation or pre-camber of the steel box girder through the cooperation of the support members and adjustment components.

[0004] However, the aforementioned jig device only supports the bottom of the steel box girder with screws and does not have an effective limiting structure for the lateral movement of the steel box girder. In the actual assembly process, the steel box girder is prone to lateral sliding or displacement due to factors such as its own weight shift and external force collisions, resulting in inaccurate alignment of each segment and displacement of the assembly benchmark. Repeated adjustments are required to correct the deviation, which seriously affects the construction efficiency. Utility Model Content

[0005] This utility model provides an assembly and positioning auxiliary device for steel box girder jigs to solve the technical problem that steel box girders are prone to lateral sliding or displacement on jig devices.

[0006] To solve the above-mentioned technical problems, this utility model discloses an assembly and positioning auxiliary device for a steel box girder jig, comprising: a jig body, the jig body being used to support the steel box girder body, fixed plates symmetrically arranged on the left and right sides of the jig body, a lifting assembly being arranged on the fixed plates, a lifting seat being arranged at the upper end of the lifting assembly, a sliding groove being arranged on the upper surface of the lifting seat, a plurality of adjusting blocks being arranged in the sliding groove, a transverse jack being arranged at the upper end of the adjusting block, the output ends of the transverse jacks on the left and right sides being arranged opposite each other, and a positioning block being arranged at the output end of the transverse jack.

[0007] Preferably, the lifting assembly includes a first threaded hole and a first guide hole disposed in the fixed plate. A first screw is disposed in the first threaded hole. The outer wall of the first screw is threadedly connected to the inner wall of the first threaded hole through an external thread. The upper end of the first screw is rotatably connected to the bottom wall of the lifting seat. The lower end of the first screw extends to the bottom of the fixed plate. A first guide rod is slidably disposed in the first guide hole. The upper end of the first guide rod is connected to the bottom wall of the lifting seat.

[0008] Preferably, a first rotating wheel is fixedly mounted at the lower end of the first screw.

[0009] Preferably, both the first screw and the first guide rod are vertically arranged, with the first screw parallel to the first guide rod.

[0010] Preferably, the adjusting block is slidably connected to the inner wall of the chute.

[0011] Preferably, a sliding hole is provided on the side of the lifting seat away from the main body of the frame. The sliding hole is provided along the front-rear direction of the lifting seat and is connected to the inside of the sliding groove. A second screw is slidably installed in the sliding hole. The second screw corresponds to an adjusting block. A second threaded hole is provided horizontally in the adjusting block. The outer wall of one end of the second screw is connected to the inner wall of the second threaded hole through an external thread. The other end of the second screw extends to the outside of the sliding hole and is provided with a second rotating wheel.

[0012] Preferably, a friction block is fixedly installed on the outer wall of the second screw, and the friction block is located outside the lifting seat.

[0013] Preferably, a mounting cavity is provided inside the positioning block, the mounting cavity is located on the side of the positioning block away from the transverse jack, and a ball bearing is rotatably installed inside the mounting cavity, with one side of the ball bearing located outside the positioning block.

[0014] Preferably, a plurality of second guide holes are provided on the side of the positioning block away from the transverse jack. A plurality of second guide posts are slidably arranged in the second guide holes. The end of the second guide post away from the transverse jack extends to the outside of the second guide hole and is connected to the moving plate. A first through hole is provided at the center of the moving plate. The diameter of the first through hole is larger than the diameter of the ball. A third threaded hole is provided in the positioning block. The third threaded hole is parallel to the second guide holes and penetrates the left and right side walls of the positioning block. A third screw is provided in the third threaded hole. The outer wall of the third screw is threadedly connected to the inner wall of the third threaded hole. One end of the third screw is rotatably connected to the moving plate. The other end of the third screw extends to the outside of the third threaded hole and is provided with a third rotating wheel.

[0015] Preferably, a contact plate is provided on the side of the moving plate away from the positioning block, and a second through hole is provided at the center of the contact plate, the diameter of the second through hole being larger than the diameter of the ball.

[0016] The technical solution of this utility model has the following advantages: This utility model provides an assembly and positioning auxiliary device for a steel box girder jig, relating to the field of steel box girder jig technology. It includes a jig body for supporting the steel box girder body. Fixed plates are symmetrically arranged on the left and right sides of the jig body. Lifting components are mounted on the fixed plates, and a lifting seat is mounted on the upper end of the lifting components. A sliding groove is provided on the upper surface of the lifting seat, and several adjusting blocks are arranged within the sliding groove. A transverse jack is mounted on the upper end of each adjusting block. The output ends of the transverse jacks on the left and right sides are arranged opposite each other, and positioning blocks are mounted on the output ends of the transverse jacks. In this utility model, the cooperation of the transverse jacks and positioning blocks can form rigid limits on the left and right sides of the steel box girder body, effectively restricting the lateral movement of the steel box girder body on the jig body. This avoids slippage or displacement of the steel box girder body on the jig body, ensuring that the steel box girder body remains in the preset position during assembly, thus improving the positioning accuracy of the steel box girder body.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the means particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a front view of an assembly and positioning auxiliary device for a steel box girder jig according to the present invention.

[0021] Figure 2 This is a side view of the lifting seat in this utility model;

[0022] Figure 3 This is a top view of an assembly and positioning auxiliary device for a steel box girder jig according to the present invention;

[0023] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the internal structure of the positioning block in this utility model.

[0025] In the diagram: 1. Main body of the jig frame; 2. Main body of the steel box girder; 3. Fixed plate; 4. Lifting seat; 5. Slide groove; 6. Adjusting block; 7. Horizontal jack; 8. Positioning block; 9. First screw; 10. First guide rod; 11. First rotating wheel; 12. Sliding hole; 13. Second screw; 14. Second rotating wheel; 15. Friction block; 16. Ball bearing; 17. Second guide hole; 18. Second guide column; 19. Moving plate; 20. Third screw; 21. Third rotating wheel; 22. Contact plate. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Example 1:

[0029] This utility model embodiment provides an assembly and positioning auxiliary device for a steel box girder jig, such as... Figures 1-5 As shown, it includes: a jig body 1, which supports the steel box girder body 2; fixed plates 3 are symmetrically arranged on the left and right sides of the jig body 1; a lifting assembly is arranged on the fixed plates 3; a lifting seat 4 is arranged on the upper end of the lifting assembly; a slide groove 5 is arranged on the upper surface of the lifting seat 4; several adjusting blocks 6 are arranged in the slide groove 5; a transverse jack 7 is arranged on the upper end of the adjusting block 6; the output ends of the transverse jack 7 on the left and right sides are arranged opposite each other; and a positioning block 8 is arranged on the output end of the transverse jack 7.

[0030] The working principle and beneficial effects of the above technical solution are as follows: The main body 1 of the jig adopts an existing jig, which can provide stable support for the main body 2 of the steel box girder. Fixed plates 3 are set on the left and right sides of the jig main body 1. The fixed plates 3 are fixedly connected to the side walls of the jig main body 1. Lifting components are set on the fixed plates 3. The lifting components can drive the lifting seat 4 to lift above the fixed plates 3. In use, the main body 2 of the steel box girder is first hoisted onto the jig main body 1. Then, the lifting components drive the lifting seat 4 to rise. The rise of the lifting seat 4 drives the adjusting block 6 in the slide 5 to move upward synchronously, so that the positioning block 8 and the force point of the side wall of the main body 2 of the steel box girder are at the same height. Then, the horizontal jacks 7 on the left and right sides are started synchronously, thereby pushing the positioning block 8 closer to the side of the main body 2 of the steel box girder until the positioning blocks 8 on both sides are in contact with the outer wall of the main body 2 of the steel box girder. Thus, the lateral thrust of the horizontal jacks 7 makes the main body 2 of the steel box girder located in the center of the jig main body 1, realizing the positioning of the positioning block 8. The lateral clamping and positioning of the main body 2 of the steel box girder is achieved through the cooperation of the lateral jack 7 and the positioning block 8, which can form a rigid limit on the left and right sides of the main body 2 of the steel box girder, effectively restricting the lateral movement of the main body 2 of the steel box girder on the jig body 1, avoiding the sliding or displacement of the main body 2 of the steel box girder on the jig body 1, so that the main body 2 of the steel box girder is always in the preset position during the assembly process, improving the positioning accuracy of the main body 2 of the steel box girder and ensuring construction efficiency. The lifting seat 4 is set along the front and rear direction of the jig body 1, and multiple adjusting blocks 6 are set in the sliding groove 5 on the upper surface of the lifting seat 4. All adjusting blocks 6 are equipped with lateral jacks 7, so that different positioning blocks 8 clamp different positions on the side wall of the main body 2 of the steel box girder, thereby adapting to the main body 2 of the steel box girder of different lengths. The lateral pushing of the lateral jack 7 can replace manual adjustment of the position of the main body 2 of the steel box girder, reducing the labor intensity of the workers and shortening the position adjustment time of the main body 2 of the steel box girder, thus greatly improving the assembly efficiency.

[0031] Example 2:

[0032] Based on the above embodiment 1, as follows Figure 1 As shown, the lifting assembly includes a first threaded hole and a first guide hole disposed in the fixed plate 3. A first screw 9 is disposed in the first threaded hole. The outer wall of the first screw 9 is threadedly connected to the inner wall of the first threaded hole through an external thread. The upper end of the first screw 9 is rotatably connected to the bottom wall of the lifting seat 4. The lower end of the first screw 9 extends to the bottom of the fixed plate 3. A first guide rod 10 is slidably disposed in the first guide hole. The upper end of the first guide rod 10 is connected to the bottom wall of the lifting seat 4.

[0033] The first rotating wheel 11 is fixedly installed at the lower end of the first screw 9;

[0034] Both the first screw 9 and the first guide rod 10 are vertically arranged, with the first screw 9 parallel to the first guide rod 10.

[0035] The working principle and beneficial effects of the above technical solution are as follows: Rotating the first rotating wheel 11 can drive the first screw 9 to rotate in the first threaded hole. Under the sliding guidance of the first guide rod 10 and the first guide hole, the rotation of the first screw 9 drives the lifting seat 4 to move linearly in the vertical direction, thereby adjusting the height of the lifting seat 4. During the rising or falling process of the lifting seat 4, the lifting seat 4 drives the first guide rod 10 to slide in the first guide hole, which improves the stability of the movement of the lifting seat 4, prevents the lifting seat 4 from tilting or shaking during the rising and falling process, ensures that the transverse jack 7 and the positioning block 8 always maintain a stable posture, improves the reliability of the positioning block 8 in the transverse positioning of the steel box girder body 2, and by adjusting the height of the lifting seat 4, the height of the positioning block 8 can be changed, ensuring that the positioning block 8 can accurately contact the force point of the side wall of the steel box girder body 2, thus improving the positioning accuracy.

[0036] Example 3:

[0037] Based on Example 1 or 2, such as Figures 1-3 As shown, the adjusting block 6 is slidably connected to the inner wall of the slide groove 5.

[0038] A sliding hole 12 is provided on the side of the lifting seat 4 away from the main body 1 of the frame. The sliding hole 12 is provided along the front and rear direction of the lifting seat 4. The sliding hole 12 is connected to the inside of the sliding groove 5. A second screw 13 is slidably installed in the sliding hole 12. The second screw 13 corresponds to the adjusting block 6 one by one. A second threaded hole is horizontally provided in the adjusting block 6. The outer wall of one end of the second screw 13 is connected to the inner wall of the second threaded hole through the external thread. The other end of the second screw 13 extends to the outside of the sliding hole 12 and is provided with a second rotating wheel 14.

[0039] Friction block 15 is fixedly installed on the outer wall of the second screw 13, and friction block 15 is located outside the lifting seat 4.

[0040] The working principle and beneficial effects of the above technical solution are as follows: The adjusting block 6 is slidably connected to the inner wall of the slide groove 5, which facilitates flexible adjustment of the position of the adjusting block 6 in the slide groove 5. When it is necessary to adjust the position of the adjusting block 6, the second rotating wheel 14 is pushed. The second rotating wheel 14 drives the second screw 13 to slide back and forth in the sliding hole 12, thereby driving the adjusting block 6 to slide back and forth in the slide groove 5, realizing the adjustment of the position of the adjusting block 6. When the adjusting block 6 moves to the target position, the second rotating wheel 14 is rotated. The rotation of the second rotating wheel 14 drives the second screw 13 to rotate. The rotation of the second screw 13 drives the friction block 15 to move towards the lifting seat 4 until the friction block 15 is in close contact with the outer wall of the lifting seat 4. The friction block 15 is made of anti-slip rubber material. The friction between the friction block 15 and the outer wall of the lifting seat 4 can lock the second screw 13, so that the adjusting block 6 is kept in the target position, preventing the adjusting block 6 from moving during the assembly of the steel box girder and ensuring the stability of the positioning.

[0041] Example 4:

[0042] Based on any one of Examples 1-3, such as Figures 3-5 As shown, a mounting cavity is provided inside the positioning block 8. The mounting cavity is located on the side of the positioning block 8 away from the transverse jack 7. A ball bearing 16 is rotatably installed inside the mounting cavity. One side of the ball bearing 16 is located outside the positioning block 8.

[0043] A plurality of second guide holes 17 are provided on the side of the positioning block 8 away from the transverse jack 7. A plurality of second guide posts 18 are slidably arranged in the second guide holes 17. The end of the second guide post 18 away from the transverse jack 7 extends to the outside of the second guide hole 17 and is connected to the moving plate 19. A first through hole is provided in the center of the moving plate 19. The diameter of the first through hole is larger than the diameter of the ball 16. A third threaded hole is provided in the positioning block 8. The third threaded hole is parallel to the second guide hole 17 and penetrates the left and right side walls of the positioning block 8. A third screw 20 is provided in the third threaded hole. The outer wall of the third screw 20 is threadedly connected to the inner wall of the third threaded hole. One end of the third screw 20 is rotatably connected to the moving plate 19. The other end of the third screw 20 extends to the outside of the third threaded hole and is provided with a third rotating wheel 21.

[0044] A contact plate 22 is provided on the side of the movable plate 19 away from the positioning block 8. A second through hole is provided in the center of the contact plate 22. The diameter of the second through hole is larger than the diameter of the ball 16.

[0045] The working principle and beneficial effects of the above technical solution are as follows: When the transverse jack 7 pushes the positioning block 8 towards the steel box girder body 2, the ball bearing 16 located in the installation cavity first contacts the side wall of the steel box girder body 2, and then the ball bearing 16 pushes the steel box girder body 2 to move, performing preliminary positioning of the steel box girder body 2. The rolling contact between the ball bearing 16 and the side wall of the steel box girder body 2 can reduce friction, thereby reducing the risk of scratching the surface of the steel box girder body 2, and is also conducive to the sliding of the steel box girder body 2, improving the position adjustment efficiency of the steel box girder body 2; after the steel box girder body 2 is positioned, the third rotating wheel 21 is rotated, the rotation of the third rotating wheel 21 drives the third screw 20 to rotate, the rotation of the third screw 20 drives the moving plate 19 to move towards the steel box girder body 2, and the moving plate 19 drives... The second guide post 18 slides within the second guide hole 17 until the contact plate 22 is in close contact with the side wall of the steel box girder body 2. Since the diameters of the first and second through holes are both larger than the diameter of the ball bearing 16, the ball bearing 16 can be confined within the first and second through holes. The close contact between the contact plate 22 and the steel box girder body 2 provides lateral positioning of the steel box girder body 2, preventing the steel box girder body 2 from sliding or shifting laterally on the jig body 1, thus improving the stability of the steel box girder body 2 and preventing displacement of the steel box girder body 2 during assembly. The contact plate 22 is made of anti-slip elastic material, and the friction between the contact plate 22 and the steel box girder body 2 can limit the forward and backward sliding of the steel box girder body 2, further improving the positioning stability of the steel box girder body 2.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An assembly and positioning auxiliary device for a steel box girder jig, characterized in that, include: The main body of the frame (1) is used to support the main body of the steel box girder (2). The main body of the frame (1) is symmetrically equipped with fixing plates (3) on the left and right sides. The fixing plates (3) are equipped with lifting components. The upper end of the lifting components is equipped with a lifting seat (4). The upper surface of the lifting seat (4) is equipped with a sliding groove (5). Several adjusting blocks (6) are set in the sliding groove (5). The upper end of the adjusting block (6) is equipped with a transverse jack (7). The output ends of the transverse jacks (7) on the left and right sides are set opposite to each other. The output end of the transverse jacks (7) is equipped with a positioning block (8).

2. The assembly and positioning auxiliary device for a steel box girder jig according to claim 1, characterized in that, The lifting assembly includes a first threaded hole and a first guide hole set in the fixed plate (3). A first screw (9) is set in the first threaded hole. The outer wall of the first screw (9) is threadedly connected to the inner wall of the first threaded hole through an external thread. The upper end of the first screw (9) is rotatably connected to the bottom wall of the lifting seat (4). The lower end of the first screw (9) extends to the bottom of the fixed plate (3). A first guide rod (10) is slidably set in the first guide hole. The upper end of the first guide rod (10) is connected to the bottom wall of the lifting seat (4).

3. The assembly and positioning auxiliary device for a steel box girder jig according to claim 2, characterized in that, The first rotating wheel (11) is fixedly installed at the lower end of the first screw (9).

4. The assembly and positioning auxiliary device for a steel box girder jig according to claim 2, characterized in that, Both the first screw (9) and the first guide rod (10) are vertically arranged, with the first screw (9) parallel to the first guide rod (10).

5. The assembly and positioning auxiliary device for a steel box girder jig according to claim 1, characterized in that, The adjusting block (6) is slidably connected to the inner wall of the slide groove (5) in the front and back.

6. The assembly and positioning auxiliary device for a steel box girder jig according to claim 5, characterized in that, A sliding hole (12) is provided on the side of the lifting seat (4) away from the main body (1) of the frame. The sliding hole (12) is provided along the front and back direction of the lifting seat (4). The sliding hole (12) is connected to the inside of the sliding groove (5). A second screw (13) is slidably provided in the sliding hole (12). The second screw (13) corresponds one-to-one with the adjusting block (6). A second threaded hole is provided horizontally in the adjusting block (6). The outer wall of one end of the second screw (13) is connected to the inner wall of the second threaded hole through the external thread. The other end of the second screw (13) extends to the outside of the sliding hole (12) and is provided with a second rotating wheel (14).

7. The assembly and positioning auxiliary device for a steel box girder jig according to claim 6, characterized in that, The friction block (15) is fixedly installed on the outer wall of the second screw (13), and the friction block (15) is located outside the lifting seat (4).

8. The assembly and positioning auxiliary device for a steel box girder jig according to claim 1, characterized in that, An installation cavity is provided inside the positioning block (8). The installation cavity is located on the side of the positioning block (8) away from the transverse jack (7). A ball bearing (16) is rotatably installed inside the installation cavity. One side of the ball bearing (16) is located outside the positioning block (8).

9. The assembly and positioning auxiliary device for a steel box girder jig according to claim 8, characterized in that, A number of second guide holes (17) are provided on the side of the positioning block (8) away from the transverse jack (7). A number of second guide posts (18) are slidably provided in the second guide holes (17). The second guide posts (18) extend to the outside of the second guide holes (17) away from the transverse jack (7) and are connected to the moving plate (19). A first through hole is provided in the center of the moving plate (19). The diameter of the first through hole is larger than the diameter of the ball (16). A third threaded hole is provided in the positioning block (8). The third threaded hole is parallel to the second guide hole (17). The third threaded hole penetrates the left and right side walls of the positioning block (8). A third screw (20) is provided in the third threaded hole. The outer wall of the third screw (20) is threadedly connected to the inner wall of the third threaded hole. One end of the third screw (20) is rotatably connected to the moving plate (19). The other end of the third screw (20) extends to the outside of the third threaded hole and is provided with a third rotating wheel (21).

10. The assembly and positioning auxiliary device for a steel box girder jig according to claim 9, characterized in that, A contact plate (22) is provided on the side of the movable plate (19) away from the positioning block (8). A second through hole is provided in the center of the contact plate (22), and the diameter of the second through hole is larger than the diameter of the ball (16).

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