Modularized steel truss rapid assembling and connecting structure

Abstract

The utility model relates to the technical field of steel structure engineering, and discloses a modularized steel truss rapid assembling and connecting structure which comprises a steel truss upper body and a steel truss lower body, the steel truss upper body and the steel truss lower body are fixedly connected through a length adjusting mechanism, placing grooves are formed in the four corners of the bottom of the steel truss lower body, and the length adjusting mechanism is arranged in the placing grooves. L-shaped connecting angle irons are slidably connected to the interiors of the multiple placing grooves, multiple threaded fixing grooves are formed in the front side and the rear side of the lower steel truss body, and angle iron limiting bolts are in threaded connection to the interiors of the multiple threaded fixing grooves in the top end. According to the utility model, the slots are matched and inserted with the L-shaped connecting angle irons, and the angle iron fixing bolts are finally fastened, so that multi-angle connection is completed, the effects of rapid assembly and stable connection of highway bridge steel structures are realized, truss components can be fixed in multiple directions, the overall stability and bearing capacity are enhanced, the construction period is remarkably shortened, and the construction efficiency is improved. And the construction safety of a large-span structure is ensured.

Description

Technical Field

[0001] This utility model relates to the field of steel structure engineering technology, and in particular to a modular steel truss quick assembly and connection structure. Background Technology

[0002] Modular steel trusses are spatial load-bearing structures made primarily of steel, constructed and assembled through modular design. Their basic unit consists of multiple steel members forming a triangular or quadrilateral frame module, with the members fixed together by welding or bolting. Steel possesses high strength and high toughness, ensuring the structure is stable and durable. The modular design makes each unit uniform in size and standard in specifications, allowing for interchangeability. It can be flexibly combined into truss structures of different spans, heights, and shapes according to different engineering needs.

[0003] A search revealed Chinese patent publication number CN215253840U, which discloses an installation structure for a truss plate in a modular steel structure. The structure includes a truss plate, steel columns and beams connected to the bottom of the truss plate, angle steel supports connecting the truss plate and the steel columns, upper and lower chord connecting bars connecting the truss plate and the steel beams, and cantilever braces connected to the bottom of the cantilevered end of the truss plate. This invention, through the combined arrangement of angle steel supports and column edge reinforcing bars, not only strengthens the connection between the truss plate and the steel columns but also ensures the smoothness of the components after installation. The upper and lower chord connecting bars and additional reinforcing bars ensure the reinforcement and connection at the joints. Furthermore, the addition of additional reinforcement allows for targeted construction based on site conditions. By using diagonal bracing and cantilever bracing, diagonal bracing is not required when the cantilever bracing extends too short. When the cantilever bracing exceeds 250mm, further reinforcement is provided by diagonal bracing, ensuring the support of the truss plate. However, the installation of angle steel supports and upper chord connecting bars in this structure requires extensive welding and bolting operations, making on-site construction procedures cumbersome and hindering rapid assembly. Additionally, under large span or heavy load conditions, stress concentration is prone to occur at the connection points, affecting the overall structural stability. It cannot flexibly adapt to components of different sizes, making it difficult to meet the requirements for rapid assembly and stabilization in complex construction environments. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a modular steel truss quick assembly connection structure, which aims to improve the existing technology that requires a lot of welding and bolting operations during installation, and that stress concentration is prone to occur at the connection points under large span or heavy load conditions, affecting the overall structural stability.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a modular steel truss quick-assembly connection structure, comprising a steel truss upper body and a steel truss lower body, wherein the steel truss upper body and the steel truss lower body are fixedly connected by a length adjustment mechanism; placement slots are provided at the four corners of the bottom of the steel truss lower body, and L-shaped connecting angle irons are slidably connected inside the multiple placement slots; multiple threaded fixing slots are provided on the front and rear sides of the steel truss lower body, and angle iron limiting bolts are threadedly connected inside the multiple threaded fixing slots at the top; the ends of the multiple angle iron limiting bolts are respectively threadedly connected to the middle of the multiple L-shaped connecting angle irons. The bottom of the steel truss has multiple threaded fixing slots, each with an angle iron adjusting bolt threaded inside. The ends of the multiple angle iron adjusting bolts are threaded to the bottom of multiple L-shaped connecting angle irons. The top four corners of the steel truss upper body are provided with direct connecting angle iron slots. The front and rear sides of the steel truss upper body are provided with multiple horizontal angle iron slots. The left and right sides of the steel truss upper body are provided with multiple lateral angle iron slots. The dimensions of the multiple L-shaped connecting angle irons are respectively matched with the dimensions of the multiple direct connecting angle iron slots, multiple horizontal angle iron slots, and multiple lateral angle iron slots. Multiple angle iron fixing bolts pass through the outer perimeter of the steel truss upper body.

[0006] The above technical solution involves fixing L-shaped connecting angle irons using placement slots and threaded fixing slots in conjunction with angle iron limiting bolts and angle iron adjusting bolts. Each slot matches and inserts into the L-shaped connecting angle iron, and the angle iron fixing bolts are finally tightened to complete multi-angle connections. This achieves the effect of rapid assembly and stable connection of highway bridge steel structures, and can fix truss components in multiple directions, enhancing overall stability and load-bearing capacity, significantly shortening the construction cycle, ensuring the safety of large-span structure construction, and is suitable for the efficient construction of connecting corridors and canopy steel structures.

[0007] As a further description of the above technical solution:

[0008] The length adjustment mechanism includes multiple connecting steel plates. L-shaped fixing plates are fixedly connected to the four corners inside the lower part of the steel truss. Two steel plate fixing bolts pass through the top of the front and rear sides of the lower part of the steel truss. Adjacent ends of the multiple steel plate fixing bolts pass through the interior of the multiple connecting steel plates. The ends of the multiple steel plate fixing bolts are threaded into the interior of the multiple L-shaped fixing plates. Multiple positioning holes are equidistantly opened at the left and right ends of the front and rear sides of the upper part of the steel truss. Positioning bolts pass through the interior of the two positioning holes at the top. Adjacent ends of the multiple positioning bolts pass through the top of the multiple connecting steel plates. Round-headed nuts are fixedly connected to the left and right ends of the front and rear sides inside the upper part of the steel truss. The ends of the multiple positioning bolts are threaded into the interior of the multiple round-headed nuts at the top.

[0009] The above technical solution provides support for the connecting steel plates using L-shaped fixing plates. The steel plate fixing bolts fix the connecting steel plates to the lower body of the steel truss and allow for position adjustment. The positioning bolts pass through the positioning holes and connect to the upper body of the steel truss with round-headed nuts. This achieves the effect of rapid assembly and length adaptation of highway bridge steel trusses. The truss connection length can be flexibly adjusted to meet different span requirements. Stability is enhanced by multi-part threaded fastening, and the load is evenly distributed, improving the construction efficiency and safety of large-span steel structures.

[0010] As a further description of the above technical solution:

[0011] The outer perimeter of the upper body of the steel truss is fixedly connected with crossbeams, and the multiple crossbeams are perpendicular to the outer side of the upper body of the steel truss.

[0012] Through the above technical solution: the crossbeam, as an extension component of the upper body of the steel truss, is vertically fixed to its outer perimeter. During the construction and use of highway bridges, the crossbeam can increase the lateral support points of the upper body of the steel truss, assist in bearing lateral loads, enhance the overall structure's wind resistance and lateral deformation resistance, and at the same time provide additional attachment points and working platforms for the installation of construction equipment and personnel operation.

[0013] As a further description of the above technical solution:

[0014] Reflective stickers are fixedly connected to the exterior of multiple crossbeams, and the multiple reflective stickers adopt a red and white alternating design.

[0015] Through the above technical solution, reflective stickers are fixed to the outside of the crossbeam. The red and white design allows them to strongly reflect light under illumination. At night or in low visibility conditions, this can effectively alert passing vehicles and pedestrians to the location of the steel truss structure, avoid collision accidents, ensure the safety of highway bridge construction and operation, and enhance the warning effect of the structure.

[0016] As a further description of the above technical solution:

[0017] Two rubber balls are fixedly connected to the front and rear sides and the left and right ends of the upper body of the steel truss, and the outer sides of the multiple rubber balls are all designed with an arc shape.

[0018] Through the above technical solution: the rubber ball is fixed at the key corner positions of the upper body of the steel truss, and its arc-shaped outer design has good buffering performance. In the event of a collision during transportation and assembly, the rubber ball can absorb the impact force and protect the corners of the upper body of the steel truss from damage. In the operation of highway bridges, it can buffer accidental impacts and reduce the risk of structural damage.

[0019] As a further description of the above technical solution:

[0020] The front and rear sides of the interior of the upper steel truss are fixedly connected with diagonal braces, and all of the diagonal braces adopt an X-shaped design.

[0021] Through the above technical solution, the diagonal bracing is fixed inside the upper part of the steel truss in an X shape. By utilizing the principle of triangular stability, the integrity and stability of the internal structure of the truss are enhanced. When bearing the load of the highway bridge, the diagonal bracing can effectively disperse stress, prevent local deformation, improve the load-bearing capacity of the steel truss under large span conditions, and ensure the safety and reliability of the bridge structure.

[0022] As a further description of the above technical solution:

[0023] Each of the steel plate fixing bolts is provided with an anti-loosening washer on the outside, and the interior of each of the anti-loosening washer is designed to be elastic.

[0024] Through the above technical solution: the anti-loosening shim is sleeved on the outside of the steel plate fixing bolt. Its elastic design can generate continuous pressure after the bolt is tightened, preventing the steel plate fixing bolt from loosening under the vibration or load change of the highway bridge, ensuring the connection of the length adjustment mechanism is stable, and maintaining the reliability of the overall steel truss structure.

[0025] As a further description of the above technical solution:

[0026] Both the upper and lower parts of the steel truss adopt a rectangular design, and both the upper and lower parts of the steel truss are integrally cast.

[0027] The above technical solution involves the use of an integral casting process for the upper and lower parts of the steel truss to form a rectangular structure without splicing seams. Compared with welded or assembled structures, this eliminates the risk of weld defects, improves material uniformity and structural strength, enhances overall fatigue resistance and durability, meets the long-term, heavy-load use requirements of highway bridges, and reduces maintenance costs.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, L-shaped connecting angle irons are fixed by placing slots and threaded fixing slots in conjunction with angle iron limiting bolts and angle iron adjusting bolts. Each slot matches and inserts into the L-shaped connecting angle iron, and the angle iron fixing bolts are finally tightened to complete the multi-angle connection. This achieves the effect of rapid assembly and stable connection of highway bridge steel structures. It can fix truss components in multiple directions, enhance the overall stability and load-bearing capacity, significantly shorten the construction cycle, ensure the construction safety of large-span structures, and is suitable for the efficient construction of connecting corridors and canopy steel structures.

[0030] 2. In this utility model, an L-shaped fixing plate provides support for the connecting steel plate, and the steel plate fixing bolts fix the connecting steel plate to the lower body of the steel truss and the position can be adjusted. The positioning bolts pass through the positioning holes and connect to the upper body of the steel truss with the round-headed nuts, realizing the effect of rapid assembly and length adaptation of the highway bridge steel truss. The truss connection length can be flexibly adjusted to meet different span requirements. The stability is enhanced by multi-part threaded fastening, the load is evenly distributed, and the construction efficiency and safety of large-span steel structures are improved. Attached Figure Description

[0031] Figure 1 This is a perspective view of a modular steel truss rapid assembly and connection structure proposed in this utility model;

[0032] Figure 2 This is a front view of a modular steel truss rapid assembly and connection structure proposed in this utility model;

[0033] Figure 3 This is a structural breakdown diagram of the L-shaped connecting angle iron in a modular steel truss rapid assembly connection structure proposed in this utility model;

[0034] Figure 4 This is a structural breakdown diagram of the length adjustment mechanism in a modular steel truss rapid assembly and connection structure proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the anti-loosening gasket in a modular steel truss quick assembly connection structure proposed in this utility model.

[0036] Legend:

[0037] 1. Upper steel truss; 2. Length adjustment mechanism; 201. Connecting steel plate; 202. L-shaped fixing plate; 203. Steel plate fixing bolt; 204. Positioning hole; 205. Positioning bolt; 206. Round head nut; 207. Anti-loosening washer; 3. Lower steel truss; 4. Placement slot; 5. L-shaped connecting angle iron; 6. Threaded fixing slot; 7. Angle iron limit bolt; 8. Angle iron adjusting bolt; 9. Straight connecting angle iron slot; 10. Horizontal angle iron slot; 11. Lateral angle iron slot; 12. Angle iron fixing bolt; 13. Crossbeam; 14. Reflective sticker; 15. Rubber ball; 16. Diagonal brace. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a modular steel truss quick-assembly connection structure, including a steel truss upper body 1 and a steel truss lower body 3. The steel truss upper body 1 and the steel truss lower body 3 are fixedly connected by a length adjustment mechanism 2. Placement slots 4 are provided at the four corners of the bottom of the steel truss lower body 3. L-shaped connecting angle irons 5 are slidably connected inside the multiple placement slots 4. Multiple threaded fixing slots 6 are provided on the front and rear sides of the steel truss lower body 3. Angle iron limiting bolts 7 are threadedly connected inside the multiple threaded fixing slots 6 at the top. The ends of the multiple angle iron limiting bolts 7 are respectively threadedly connected to the middle of the multiple L-shaped connecting angle irons 5. Multiple threaded fixing slots 7 are also provided at the bottom. Angle iron adjusting bolts 8 are threaded into the inside of the groove 6. The ends of the multiple angle iron adjusting bolts 8 are threaded into the bottom of multiple L-shaped connecting angle irons 5. Straight connecting angle iron slots 9 are provided at the four corners of the top of the steel truss upper body 1. Multiple horizontal angle iron slots 10 are provided on the front and rear sides of the steel truss upper body 1. Multiple lateral angle iron slots 11 are provided on the left and right sides of the steel truss upper body 1. The size of the multiple L-shaped connecting angle irons 5 matches the size of the multiple straight connecting angle iron slots 9, multiple horizontal angle iron slots 10 and multiple lateral angle iron slots 11 respectively. Multiple angle iron fixing bolts 12 pass through the outer perimeter of the steel truss upper body 1.

[0040] Specifically, in the construction of modular steel structures for highway bridges, the upper steel truss 1 and the lower steel truss 3 need to be quickly spliced ​​to form a complete component. The length adjustment mechanism 2 serves as a connecting component, used to adjust the distance between the two and achieve rigid fixation, ensuring the stability of the structure after splicing. The placement grooves 4 at the four corners at the bottom of the lower steel truss 3 provide sliding installation space for the L-shaped connecting angle irons 5. During installation, the L-shaped connecting angle irons 5 are slid into the appropriate position along the placement grooves 4. The threaded fixing grooves 6 on the front and rear sides of the lower steel truss 3 cooperate with the L-shaped connecting angle irons 5 and are fixed by the angle iron limiting bolts 7 and the angle iron adjusting bolts 8. The angle iron limiting bolts 7 are threadedly connected to the middle of the L-shaped connecting angle irons 5 to limit their horizontal displacement; the angle iron adjusting bolts 8 are threadedly connected to the bottom of the L-shaped connecting angle irons 5 to adjust the extension height of the L-shaped connecting angle irons 5 to meet the assembly requirements. The straight connecting angle iron slots 9 at the four corners at the top of the upper steel truss 1, the horizontal angle iron slots 10 on the front and rear sides, and the lateral angle iron slots 11 on the left and right sides provide... L-shaped connecting angle iron 5 provides an insertion interface. Since the size of L-shaped connecting angle iron 5 matches each slot, after inserting L-shaped connecting angle iron 5 into the corresponding slots, the upper body 1 of the steel truss and the lower body 3 of the steel truss can be connected in multiple directions such as vertical, horizontal and lateral. Finally, the L-shaped connecting angle iron 5 inserted into the slot is further tightened by the angle iron fixing bolts 12 that pass through the outer perimeter of the upper body 1 of the steel truss. The angle iron fixing bolts 12 pass through the upper body 1 of the steel truss and the L-shaped connecting angle iron 5 and are tightened to fix them, so that the upper body 1 of the steel truss and the lower body 3 of the steel truss form a stable overall structure. In the construction of highway bridges, multiple modular steel trusses can be quickly assembled in the above way. The cooperation between L-shaped connecting angle iron 5 and each slot and bolt realizes multi-angle and multi-directional connection between components, enhances the stability and load-bearing capacity of the overall structure, can significantly shorten the construction cycle, and at the same time ensures the safety of the structure under large span conditions. It is suitable for the efficient construction of large span connecting corridors and canopy steel structures of highway bridges.

[0041] Reference Figure 1 , Figure 4 and Figure 5The length adjustment mechanism 2 includes multiple connecting steel plates 201. L-shaped fixing plates 202 are fixedly connected to the four corners inside the lower body of the steel truss 3. Two steel plate fixing bolts 203 pass through the top of the front and rear sides of the lower body of the steel truss 3. The adjacent ends of the multiple steel plate fixing bolts 203 pass through the interior of the multiple connecting steel plates 201. The ends of the multiple steel plate fixing bolts 203 are threaded to the interior of the multiple L-shaped fixing plates 202. Multiple positioning holes 204 are equally spaced on the front and rear sides and left and right ends of the upper body of the steel truss 1. Positioning bolts 205 pass through the interior of the two positioning holes 204 at the top. The adjacent ends of the multiple positioning bolts 205 pass through the top of the multiple connecting steel plates 201. Round head nuts 206 are fixedly connected to the front and rear sides and left and right ends of the upper body of the steel truss 1. The ends of the multiple positioning bolts 205 are threaded to the interior of the multiple round head nuts 206 at the top.

[0042] Specifically, L-shaped fixing plates 202 are pre-fixed at the four corners inside the lower steel truss 3, providing a supporting foundation for the connecting steel plate 201. Steel plate fixing bolts 203, penetrating the top of the front and rear sides of the lower steel truss 3, serve as the connecting medium between the steel plate 201 and the L-shaped fixing plates 202. During installation, the connecting steel plate 201 is placed between the lower steel truss 3 and the L-shaped fixing plates 202. The steel plate fixing bolts 203 pass sequentially through the lower steel truss 3 and the connecting steel plate 201, and are threaded into the L-shaped fixing plates 202. By tightening the steel plate fixing bolts 203, the connecting steel plate 201 is stabilized. The steel plate 201 is fixed to the lower body 3 of the steel truss and can be adjusted in position along the front and rear direction of the lower body 3 within a certain range. The positioning holes 204 equidistantly opened on the front and rear sides and left and right ends of the upper body 1 of the steel truss correspond to the positioning holes 204 on the top of the connecting steel plate 201. The positioning bolts 205 pass through the two positioning holes 204 at the top and the corresponding holes on the top of the connecting steel plate 201, and their ends are threaded to the round-headed nuts 206 fixed inside the upper body 1 of the steel truss. During the assembly process, the connection length between the upper body 1 of the steel truss and the lower body 3 of the steel truss is first adjusted by the steel plate fixing bolts 203. The position of steel plate 201 on the lower body 3 of the steel truss is adjusted by changing the extension length of connecting steel plate 201. Once the position of connecting steel plate 201 is determined, the upper body 1 of the steel truss and the lower body 3 of the steel truss are placed correspondingly, aligning the positioning hole 204 with the hole in the connecting steel plate 201. Then, the positioning bolt 205 is passed through the positioning hole 204 and the connecting steel plate 201 in sequence and tightened in the round head nut 206, so that the connecting steel plate 201 connects the upper body 1 of the steel truss and the lower body 3 of the steel truss as one unit. At the same time, the threaded connection between the positioning bolt 205 and the round head nut 206, and the connection between the steel plate fixing bolt 203 and the L-shaped fixing plate 20 are also completed. The threaded connection of 2 ensures the tightness of the connection. In the construction of highway bridges, steel truss structures with different span requirements can be adapted to length by adjusting the position of the connecting steel plate 201 on the lower body 3 of the steel truss and changing the distance between the upper body 1 and the lower body 3 of the steel truss. The connection of multiple connecting steel plates 201 at the four corners of the upper body 1 and the lower body 3 of the steel truss forms a stable load-bearing structure, which evenly distributes the load to each connection part, enhances the stability and load-bearing capacity of the overall structure under large span conditions, and ensures the rapid assembly and safe use of the modular steel structure of the highway bridge.

[0043] Reference Figure 1 , Figure 2 and Figure 5All four sides of the outer side of the upper steel truss 1 are fixedly connected with crossbeams 13, and the crossbeams 13 are perpendicular to each other. Reflective stickers 14 are fixedly connected to the outside of the crossbeams 13, and the reflective stickers 14 are all red and white alternating. Two rubber balls 15 are fixedly connected to the front and rear sides and the left and right ends of the left and right sides of the upper steel truss 1, and the outside of the rubber balls 15 are all arc-shaped. Diagonal braces 16 are fixedly connected to the front and rear sides and the left and right sides of the interior of the upper steel truss 1, and the diagonal braces 16 are all X-shaped. Anti-loosening washers 207 are provided on the outside of the steel plate fixing bolts 203, and the inside of the anti-loosening washers 207 are all elastic. The exterior of the upper steel truss 1 and the lower steel truss 3 are both rectangular, and the upper steel truss 1 and the lower steel truss 3 are both integrally cast.

[0044] Specifically, the crossbeam 13, as an extension component of the upper steel truss 1, is vertically fixed around its outer perimeter. During the construction and use of the highway bridge, the crossbeam 13 increases the lateral support points of the upper steel truss 1, assists in bearing lateral loads, and enhances the overall structure's wind resistance and lateral deformation resistance. It also provides additional attachment points and working platforms for construction equipment installation and personnel operation. The reflective sticker 14 is fixed to the outside of the crossbeam 13; its red and white design allows it to strongly reflect light under illumination, effectively alerting passing vehicles and pedestrians to the location of the steel truss structure at night or in low-visibility environments, preventing collisions, ensuring safety during highway bridge construction and operation, and enhancing the structure's warning effect. The rubber ball 15 is fixed at key corner positions of the upper steel truss 1; its arc-shaped outer design provides excellent cushioning performance. During transportation and assembly, if a collision occurs, the rubber ball 15 can absorb the impact force, protecting the corners of the upper steel truss 1 from damage. During highway bridge operation, it can provide cushioning. To mitigate the risk of structural damage from accidental impacts, the diagonal brace 16 is fixed inside the upper steel truss 1 in an X-shape. Utilizing the principle of triangular stability, this enhances the integrity and stability of the truss's internal structure. When bearing the load of a highway bridge, the diagonal brace 16 effectively disperses stress, prevents local deformation, and improves the load-bearing capacity of the steel truss under large span conditions, ensuring the safety and reliability of the bridge structure. The anti-loosening gasket 207 is fitted outside the steel plate fixing bolt 203. Its elastic design generates continuous pressure after the bolt is tightened, preventing the steel plate fixing bolt 203 from loosening under highway bridge vibration or load changes. This ensures the stable connection of the length adjustment mechanism 2 and maintains the reliability of the overall steel truss structure. The upper steel truss 1 and the lower steel truss 3 are integrally cast, forming a seamless rectangular structure. Compared to welded or assembled structures, this eliminates the risk of weld defects, improves material uniformity and structural strength, enhances overall fatigue resistance and durability, meets the long-term, heavy-load usage requirements of highway bridges, and reduces maintenance costs.

[0045] Working principle: The length adjustment mechanism 2 is used to connect the upper body 1 and the lower body 3 of the steel truss, ensuring the stability of the structure after splicing. The placement grooves 4 at the four corners of the bottom of the lower body 3 of the steel truss provide sliding installation space for the L-shaped connecting angle irons 5. During installation, the L-shaped connecting angle irons 5 are slid into the appropriate position along the placement grooves 4. The threaded fixing grooves 6 on the front and rear sides of the lower body 3 of the steel truss cooperate with the L-shaped connecting angle irons 5 and are fixed by the angle iron limiting bolts 7 and the angle iron adjusting bolts 8. The angle iron limiting bolts 7 are threadedly connected to the middle of the L-shaped connecting angle irons 5 to limit their horizontal displacement; the angle iron adjusting bolts 8 are threadedly connected to the bottom of the L-shaped connecting angle irons 5 and can adjust the extension height of the L-shaped connecting angle irons 5 to meet the assembly requirements. The straight angle iron slots 9 at the four corners of the top of the body 1, the horizontal angle iron slots 10 on the front and rear sides, and the lateral angle iron slots 11 on the left and right sides provide insertion interfaces for the L-shaped connecting angle irons 5. Since the size of the L-shaped connecting angle irons 5 matches each slot, after inserting the L-shaped connecting angle irons 5 into the corresponding slots, the upper body 1 of the steel truss and the lower body 3 of the steel truss can be connected in multiple directions such as vertical, horizontal and lateral. Finally, the L-shaped connecting angle irons 5 inserted into the slots are further tightened by the angle iron fixing bolts 12 that pass through the outer perimeter of the upper body 1 of the steel truss. The angle iron fixing bolts 12 pass through the upper body 1 of the steel truss and the L-shaped connecting angle irons 5 and are tightened to fix them, so that the upper body 1 of the steel truss and the lower body 3 of the steel truss form a stable overall structure.

[0046] Furthermore, the L-shaped fixing plate 202 is pre-fixed at the four corners inside the lower body of the steel truss 3, providing a supporting foundation for the connecting steel plate 201. During installation, the connecting steel plate 201 is placed between the lower body of the steel truss 3 and the L-shaped fixing plate 202. The steel plate fixing bolts 203 pass through the lower body of the steel truss 3 and the connecting steel plate 201 in sequence, and are threaded into the L-shaped fixing plate 202. By tightening the steel plate fixing bolts 203, the connecting steel plate 201 is firmly fixed on the lower body of the steel truss 3, and the position of the connecting steel plate 201 can be adjusted within a certain range along the front and rear direction of the lower body of the steel truss 3. The positioning holes 204 equidistantly opened at the left and right ends of the front and rear sides of the upper body of the steel truss 1 correspond to the positioning holes 204 at the top of the connecting steel plate 201. The positioning bolts 205 pass through the two positioning holes 204 at the top and the corresponding holes at the top of the connecting steel plate 201, and their ends are threaded into the corresponding holes. The round-headed nut 206 fixed inside the upper body 1 of the steel truss is used during assembly. According to the required connection length between the upper body 1 and the lower body 3 of the steel truss, the position of the connecting steel plate 201 on the lower body 3 is first adjusted by the steel plate fixing bolt 203, changing the extension length of the connecting steel plate 201. After the position of the connecting steel plate 201 is determined, the upper body 1 and the lower body 3 of the steel truss are placed correspondingly, so that the positioning hole 204 is aligned with the hole of the connecting steel plate 201. Then, the positioning bolt 205 is passed through the positioning hole 204 and the connecting steel plate 201 in sequence and tightened in the round-headed nut 206, so that the connecting steel plate 201 connects the upper body 1 and the lower body 3 of the steel truss into one unit. At the same time, the threaded connection between the positioning bolt 205 and the round-headed nut 206, and the threaded connection between the steel plate fixing bolt 203 and the L-shaped fixing plate 202, together ensure the tightness of the connection.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular steel truss rapid assembly and connection structure, comprising a steel truss upper body (1) and a steel truss lower body (3), characterized in that: The upper body (1) and lower body (3) of the steel truss are fixedly connected by a length adjustment mechanism (2). The lower body (3) of the steel truss has four corners at the bottom, and L-shaped connecting angle irons (5) are slidably connected inside the multiple placement slots (4). The lower body (3) of the steel truss has multiple threaded fixing slots (6) on the front and rear sides. Angle iron limiting bolts (7) are threaded inside the multiple threaded fixing slots (6) at the top. The ends of the multiple angle iron limiting bolts (7) are threaded to the middle of the multiple L-shaped connecting angle irons (5). Angle iron adjusting bolts (8) are threaded inside the multiple threaded fixing slots (6) at the bottom. The ends of the multiple angle iron adjusting bolts (8) are threaded to the bottom of multiple L-shaped connecting angle irons (5). The four corners of the top of the steel truss upper body (1) are provided with direct connecting angle iron slots (9). Multiple horizontal angle iron slots (10) are provided on the front and rear sides of the steel truss upper body (1). Multiple lateral angle iron slots (11) are provided on the left and right sides of the steel truss upper body (1). The size of the multiple L-shaped connecting angle irons (5) matches the size of the multiple direct connecting angle iron slots (9), the multiple horizontal angle iron slots (10) and the multiple lateral angle iron slots (11). Multiple angle iron fixing bolts (12) pass through the outer perimeter of the steel truss upper body (1).

2. The modular steel truss quick assembly connecting structure according to claim 1, characterized in that: The length adjustment mechanism (2) includes multiple connecting steel plates (201). L-shaped fixing plates (202) are fixedly connected to the four corners inside the lower steel truss body (3). Two steel plate fixing bolts (203) pass through the top of the front and rear sides of the lower steel truss body (3). The adjacent ends of the multiple steel plate fixing bolts (203) pass through the interior of the multiple connecting steel plates (201), and the ends of the multiple steel plate fixing bolts (203) are threaded into the interior of the multiple L-shaped fixing plates (202). Multiple positioning holes (204) are equally spaced on the front and rear sides and left and right ends of the truss upper body (1). Positioning bolts (205) are inserted through the two positioning holes (204) at the top. The adjacent ends of the multiple positioning bolts (205) are respectively inserted through the top of multiple connecting steel plates (201). Round head nuts (206) are fixedly connected to the front and rear sides and left and right ends of the steel truss upper body (1). The ends of the multiple positioning bolts (205) are respectively threaded into the interior of the multiple round head nuts (206) at the top.

3. The modular steel truss quick assembly connecting structure according to claim 1, characterized in that: The outer perimeter of the upper steel truss (1) is fixedly connected with crossbeams (13), and the multiple crossbeams (13) are perpendicular to the outer perimeter of the upper steel truss (1).

4. The modular steel truss quick assembly connecting structure according to claim 3, characterized in that: Reflective stickers (14) are fixedly connected to the outside of multiple beams (13), and the multiple reflective stickers (14) adopt a red and white alternating design.

5. The modular steel truss quick assembly connecting structure according to claim 1, characterized in that: Two rubber balls (15) are fixedly connected to the front and rear sides of the upper steel truss (1) and the front and rear ends of the left and right sides of the upper steel truss (1). The outer sides of the multiple rubber balls (15) are all designed with an arc shape.

6. The modular steel truss quick assembly connecting structure according to claim 1, characterized in that: The front and rear sides of the steel truss upper body (1) and the left and right sides of the steel truss upper body (1) are all fixedly connected with diagonal braces (16), and all of the diagonal braces (16) adopt an X-shaped design.

7. The modular steel truss quick assembly connecting structure according to claim 2, characterized in that: Each of the steel plate fixing bolts (203) is provided with an anti-loosening washer (207) on its exterior, and the interior of each of the anti-loosening washer (207) is designed to be elastic.

8. The modular steel truss quick assembly connecting structure according to claim 1, characterized in that: The exterior of the upper steel truss (1) and the lower steel truss (3) are both rectangular, and the upper steel truss (1) and the lower steel truss (3) are both integrally cast.

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