A steel beam without support method fast connection and positioning device

Abstract

The utility model provides a kind of steel cross beam support-free method fast connection and positioning device, it is related to the technical field of bridge steel structure construction, including backplate, connecting lug plate, first stiffened plate, double connecting clamping plate, second stiffened plate, connecting pin shaft and positioning bolt;The bottom of backplate, connecting lug plate and first stiffened plate is fixedly welded with steel cross beam top plate;The side of connecting lug plate and first stiffened plate is fixedly welded with the side of backplate;Two are symmetrically set to double connecting clamping plate, and the side of double connecting clamping plate is fixedly welded with two second stiffened plates symmetrically;When using, without building a large number of temporary support, by the cooperation of backplate, connecting lug plate, first stiffened plate, double connecting clamping plate, second stiffened plate, connecting pin shaft, pin hole, annular limiting plate, positioning bolt and nut, the connection of steel cross beam and side beam is realized, a series of expenses such as support material procurement, erection, demolition and transportation are reduced, and construction cost is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge steel structure construction, and in particular to a quick connection and positioning device for steel crossbeams without supports. Background Technology

[0002] In the construction of tied arch bridges, the main girder system often adopts a structure of side tie beams combined with middle crossbeams (steel crossbeams). However, when encountering middle crossbeams with large spans, traditional construction methods often require a large number of temporary supports for installation. This method has many drawbacks: on the one hand, the huge amount of temporary supports used leads to a significant increase in construction costs, including not only material procurement costs but also expenses related to the erection, dismantling, and transportation of supports; on the other hand, the construction process is extremely cumbersome, as the middle crossbeams must be unloaded one by one, greatly reducing construction efficiency and extending the project cycle; in addition, the use of temporary supports may also bring certain safety hazards, such as stability issues of the supports and accidental risks during dismantling and assembly, threatening the lives of construction workers. Therefore, it is necessary to provide a quick connection and positioning device for steel crossbeams without supports to solve the above technical problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a quick connection and positioning device for steel crossbeams without supports.

[0004] This utility model provides a quick connection and positioning device for steel crossbeams without supports, comprising a back plate, connecting ear plates, a first stiffening plate, double connecting clamps, a second stiffening plate, connecting pins, and positioning bolts; the bottoms of the back plate, connecting ear plates, and the first stiffening plate are all fixedly welded to the top plate of the steel crossbeam; one side of the connecting ear plates and the first stiffening plate is fixedly welded to one side of the back plate; two double connecting clamps are symmetrically arranged, and the bottoms of the two double connecting clamps are fixedly welded to the bottom plate of the side tie beam; two second stiffening plates are symmetrically fixedly welded to one side of the double connecting clamps, and the bottoms of the second stiffening plates are fixedly welded to the bottom plate of the side tie beam.

[0005] Preferably, the connecting ear plate and the double connecting clamp plate are provided with a pin hole for installing the connecting pin, and the connecting ear plate and the double connecting clamp plate are provided with a bolt hole for installing the positioning bolt. There are four positioning bolts and four corresponding bolt holes. One end of the positioning bolt passes through the corresponding bolt hole and is threaded with a nut. The bolt hole is adapted to the positioning bolt.

[0006] Preferably, one end of the connecting pin is fixedly connected to an annular limiting plate, and the other end of the connecting pin extends through the pin hole to the outside and then has a pin hole. A cotter pin that matches the pin hole is inserted into the pin hole, and the connecting pin is adapted to the pin hole.

[0007] Preferably, the back plate is a rectangular steel plate with a thickness of not less than 10mm, a height of not less than 200mm, and a width of not less than 150mm.

[0008] Preferably, the connecting ear plate is a rectangular steel plate with a thickness of not less than 12mm, a height of not less than 180mm, and a width of not less than 120mm.

[0009] Preferably, the double connecting plate is a rectangular steel plate, and the thickness of the double connecting plate is not less than 12mm, the height is not less than 180mm, and the width is not less than 120mm.

[0010] Preferably, the first stiffening plate is a triangular or rectangular steel plate with a thickness of not less than 8 mm, a height of not less than 150 mm, and a width of not less than 100 mm.

[0011] Preferably, the second stiffening plate is a triangular or rectangular steel plate with a thickness of not less than 8mm, a height of not less than 150mm, and a width of not less than 100mm.

[0012] Preferably, the connecting pin is made of high-strength alloy steel, with a surface hardened, and has a diameter of not less than 30mm and a length of not less than 150mm; the positioning bolt is a high-strength bolt with a strength grade of not less than 8.8.

[0013] Preferably, one end of the connecting ear plate extends between the two double connecting plates, and the distance between the two double connecting plates is matched with the thickness clearance of the connecting ear plate, with a clearance value of 1-3mm.

[0014] Compared with related technologies, the steel beam supportless quick connection and positioning device provided by this utility model has the following advantages:

[0015] 1. The steel crossbeam quick connection and positioning device of this utility model does not require the construction of a large number of temporary supports during use. The connection between the steel crossbeam and the side tie beam is achieved through the cooperation of the back plate, connecting ear plate, first stiffening plate, double connecting clamp plate, second stiffening plate, connecting pin, pin hole, annular limiting plate, positioning bolt and nut. This reduces a series of expenses such as the purchase, erection, dismantling and transportation of support materials, and significantly reduces construction costs.

[0016] 2. The positioning bolts can be used to quickly achieve the initial positioning of the steel beam. The bolt holes on the connecting ear plate and double connecting clamp plate can accurately and quickly fix the steel beam in the approximate position, reducing the cumbersome measurement and adjustment steps in traditional construction.

[0017] 3. Subsequently, the connecting pin is inserted into the pin hole on the connecting ear plate and the double connecting clamp plate, and a cotter pin and annular limiting plate are used in the pin hole to complete a stable connection. The whole process is simple to operate, which greatly shortens the installation time of the steel beam, improves construction efficiency, and shortens the project cycle.

[0018] 4. It avoids the stability problems that may exist in temporary supports and the accidental risks during disassembly and assembly. The first stiffening plate enhances the stability of the connection between the back plate and the top plate of the steel crossbeam, and the second stiffening plate improves the reliability of the connection between the double connecting plates and the bottom plate of the side tie beam, making the installation process of the steel crossbeam safer and more reliable, and ensuring the safety of construction personnel. Attached Figure Description

[0019] Figure 1 This is an overall rendering of the supportless quick connection and positioning device for steel crossbeams of this utility model.

[0020] Figure 2 This is a structural schematic diagram of the quick connection and positioning device for steel crossbeams without supports according to this utility model;

[0021] Figure 3 This is a partial sectional view of the quick connection and positioning device for steel crossbeams without supports according to this utility model.

[0022] The following are the labeling elements in the diagram: 1. Side tie beam; 2. Steel crossbeam; 3. Connecting positioning device; 301. Back plate; 302. Connecting ear plate; 303. First stiffening plate; 304. Double connecting clamp plate; 305. Second stiffening plate; 306. Connecting pin; 3061. Pin hole; 3062. Annular limiting plate; 307. Positioning bolt; 3071. Nut. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example

[0025] Please refer to the following: Figures 1 to 3A quick connection and positioning device for steel crossbeams without supports includes a side tie beam 1, a steel crossbeam 2, and a connecting positioning device 3. The side tie beam 1 and the steel crossbeam 2 are connected by the connecting positioning device 3. Several connecting positioning devices 3 are provided. The connecting positioning device 3 includes a back plate 301, a connecting ear plate 302, a first stiffening plate 303, a double connecting clamp 304, a second stiffening plate 305, a connecting pin 306, and a positioning bolt 307. The bottom of the back plate 301, the connecting ear plate 302, and the first stiffening plate 303 are all fixedly welded to the top plate of the steel crossbeam 2. One side of the connecting ear plate 302 and the first stiffening plate 303 are all fixedly welded to one side of the back plate 301. Two double connecting clamps 304 are symmetrically arranged. The bottom of the two double connecting clamps 304 are fixedly welded to the bottom plate of the side tie beam 1. Two second stiffening plates 305 are symmetrically fixedly welded to one side of the double connecting clamps 304. The bottom of the second stiffening plates 305 are all fixedly welded to the bottom plate of the side tie beam 1.

[0026] In the above, the fixed welding of the back plate 301, connecting ear plate 302, and first stiffening plate 303 to the top plate of the steel crossbeam 2, as well as the welding of the connecting ear plate 302, the first stiffening plate 303, and the back plate 301, form a stable side connection foundation for the crossbeam, which can effectively transfer the load. The welding of the double connecting clamp plate 304 to the bottom plate of the side tie beam 1, together with the reinforcement of the second stiffening plate 305, provides a reliable support structure for the side tie beam 1. Together, they constitute the core frame of the bracketless connection, providing structural support for the subsequent installation of the connecting pin 306 and the positioning bolt 307. "Side tie beam 1" refers to the side load-bearing beam in the tied arch bridge, "bottom plate of side tie beam 1" refers to the bottom steel plate of side tie beam 1, and "top plate of steel crossbeam 2" refers to the top steel plate of steel crossbeam 2.

[0027] Furthermore, the connecting ear plate 302 and the double connecting clamp plate 304 are both provided with a pin hole for installing the connecting pin 306. The connecting ear plate 302 and the double connecting clamp plate 304 are both provided with a bolt hole for installing the positioning bolt 307. There are four positioning bolts 307 and four bolt holes, which are set one-to-one. One end of the positioning bolt 307 passes through the corresponding bolt hole and is threaded with a nut 3071. The bolt hole is compatible with the positioning bolt 307.

[0028] In the above, the pin hole provides an installation channel for the connecting pin 306, ensuring that the connecting ear plate 302 and the double connecting clamp plate 304 can achieve a hinged and stable connection; the bolt through hole and the cooperation of the four positioning bolts 307 can quickly and initially fix the steel beam 2, and the setting of the nut 3071 can prevent the positioning bolts 307 from loosening, ensuring the stability of the initial positioning, reducing the time of repeated measurement and adjustment in traditional construction, and greatly improving the positioning efficiency.

[0029] Furthermore, one end of the connecting pin 306 is fixedly connected to an annular limiting plate 3062, and the other end of the connecting pin 306 extends through the pin hole to the outside and then passes through a pin hole 3061. A cotter pin that matches it is inserted into the pin hole 3061, and the connecting pin 306 matches the pin hole.

[0030] In the above, the annular limiting plate 3062 can restrict the axial movement of the connecting pin 306 from one end, preventing the connecting pin 306 from falling off from one side. The engagement of the pin hole 3061 and the cotter pin fixes the connecting pin 306 from the other end, forming a double limiting mechanism. This ensures that the connecting pin 306 will not loosen or shift when bearing load, enhancing the reliability of the connection between the connecting ear plate 302 and the double connecting clamp 304, and ensuring the safety of the overall structure.

[0031] Furthermore, the back plate 301 is a rectangular steel plate with a thickness of not less than 10mm, a height of not less than 200mm, and a width of not less than 150mm; when the back plate 301 is welded to the top plate of the steel beam 2, the weld height is not less than 8mm and the weld length is not less than 100mm.

[0032] As mentioned above, the dimensions of the back plate 301 ensure that it has sufficient structural strength to withstand the load transmitted by the crossbeam; while the size requirements of the weld ensure the firmness of the weld between the back plate 301 and the top plate of the steel crossbeam 2, avoiding the back plate 301 from falling off or deforming due to insufficient welding strength, and providing a stable load-bearing foundation for the entire connection device.

[0033] Furthermore, the connecting ear plate 302 is a rectangular steel plate with a thickness of not less than 12mm, a height of not less than 180mm, and a width of not less than 120mm. When welded to the top plate of the steel beam 2, the weld height is not less than 10mm and the weld length is not less than 90mm.

[0034] The dimensions of the connecting ear plate 302, as described above, give it strong shear and bending resistance, enabling it to meet the stress requirements when connected to the double connecting clamp plate 304. The size requirements of the weld when welding to the top plate of the steel beam 2 further ensure the connection strength between the connecting ear plate 302 and the beam, ensuring that the load can be effectively transferred.

[0035] Furthermore, the double connecting plate 304 is a rectangular steel plate with a thickness of not less than 12mm, a height of not less than 180mm, and a width of not less than 120mm. When welded to the bottom plate of the side tie beam 1, the weld height is not less than 10mm and the weld length is not less than 90mm.

[0036] The dimensions of the double connecting clamp 304 ensure that it can stably clamp the connecting ear plate 302 and withstand the forces during the connection process. The weld size requirements for welding with the bottom plate of the side tie beam 1 ensure the connection between the double connecting clamp 304 and the side tie beam 1, and can reliably transfer the load of the steel beam 2 to the side tie beam 1.

[0037] Furthermore, the first stiffening plate 303 is a triangular or rectangular steel plate with a thickness of not less than 8mm, a height of not less than 150mm, and a width of not less than 100mm. When welded to the back plate 301 and the top plate of the steel beam 2, the weld height is not less than 6mm and the weld length is not less than 80mm.

[0038] In the above, the first stiffening plate 303 has a triangular or rectangular structure in size and shape, which can effectively enhance the connection stiffness between the back plate 301 and the top plate of the steel beam 2, disperse the force on the back plate 301, and prevent the back plate 301 from tilting or deforming due to force concentration; the weld size requirements of the back plate 301 and the top plate of the steel beam 2 ensure the effective performance of the stiffening effect and improve the stability of the beam side connection structure.

[0039] Furthermore, the second stiffening plate 305 is a triangular or rectangular steel plate with a thickness of not less than 8mm, a height of not less than 150mm, and a width of not less than 100mm. When welded to the double connecting plate 304 and the bottom plate of the side tie beam 1, the weld height is not less than 6mm and the weld length is not less than 80mm.

[0040] In the above, the dimensions and shape of the second stiffening plate 305 are triangular or rectangular, which can enhance the connection strength between the double connecting plate 304 and the bottom plate of the side tie beam 1, resist the lateral force generated by the double connecting plate 304 when under stress, and prevent it from bending or tilting; the weld size requirements of the double connecting plate 304 and the bottom plate of the side tie beam 1 ensure the reliability of the stiffening effect and guarantee the stability of the side connection structure of the side tie beam 1.

[0041] Furthermore, the connecting pin 306 is made of high-strength alloy steel, with a surface hardened to a hardness of not less than HRC30, a diameter of not less than 30mm, and a length of not less than 150mm; the positioning bolt 307 is a high-strength bolt with a strength grade of not less than 8.8, a diameter of not less than 20mm, and a length of not less than 100mm.

[0042] In the above, the connecting pin 306 is made of high-strength alloy steel and surface hardened, with a hardness of not less than HRC30, giving it high wear resistance and shear resistance. Combined with its size and specifications, it can reliably bear the load of the steel beam 2. The positioning bolt 307 is a high-strength bolt of grade 8.8 or above. Its size and specifications ensure the tightening force during initial positioning. The nut 3071 is threadedly connected to the positioning bolt 307 to prevent loosening and ensure the safety of positioning and connection.

[0043] Furthermore, one end of the connecting ear plate 302 extends between the two double connecting plates 304, and the distance between the two double connecting plates 304 is matched with the thickness clearance of the connecting ear plate 302, with a clearance value of 1-3mm.

[0044] In the above, the connecting ear plate 302 extends between the two double connecting plates 304. The 1-3mm gap ensures that the connecting ear plate 302 can be installed smoothly and reduces the space for shaking between the two, ensuring accurate positioning. At the same time, the small gap provides room for component expansion or installation errors caused by temperature changes, avoids stress concentration caused by rigid contact, and protects the connecting ear plate 302 and the double connecting plates 304 from damage.

[0045] In practical applications, when installing a steel beam 2 with a large span, the construction team first accurately determines the installation positions of various components such as the back plate 301, connecting ear plate 302, first stiffening plate 303, double connecting clamp plate 304, and second stiffening plate 305 according to the design drawings. Professional welders then use high-precision welding equipment and strictly follow welding process specifications to weld the back plate 301, connecting ear plate 302, and first stiffening plate 303 to the top plate of the steel beam 2, ensuring that the welded areas are free of defects such as porosity and slag inclusions. After welding, visual inspection and non-destructive testing are performed to ensure that the quality meets the standards. Meanwhile, on the bottom plate of the side tie beam 1, the construction workers also used precise welding techniques to fix and install the double connecting clamp 304 and the second stiffening plate 305. During the installation process, positioning fixtures and measuring instruments were used to ensure the positional accuracy and welding quality of each component, laying a solid foundation for subsequent connection operations. After the steel beam 2 was smoothly lifted to the vicinity of the design position by large hoisting equipment, the on-site construction workers quickly passed the four positioning bolts 307 through the pre-set bolt holes to initially connect the steel beam 2 to the double connecting clamp 304 on the side tie beam 1, achieving rapid positioning. During the positioning process, high-precision measuring equipment is used to monitor and fine-tune the position of the steel beam 2 in real time, ensuring that its installation position accuracy reaches the millimeter level and meets the engineering design requirements. After positioning, the construction personnel accurately insert the connecting pin 306 into the pre-drilled pin holes on the connecting ear plate 302 and the double connecting clamp plate 304, and use anti-loosening measures to fix it, ensuring that a stable and reliable connection structure is formed between the steel beam 2 and the side tie beam 1. At this time, the load on the hook is gradually transferred to the connection positioning device. After careful inspection to confirm that the connection is correct and the structure is stable, the load is then lifted. The hook unloading operation can be carried out safely, and the task of rapid connection and positioning of steel crossbeam 2 without support can be successfully completed. Throughout the construction process, construction personnel must also take various protective measures, such as wearing safety helmets, safety belts and other personal protective equipment, setting up safety warning areas, and preventing unauthorized personnel from entering the construction area to ensure construction safety. At the same time, the installed devices should be regularly inspected and maintained to promptly identify and deal with any problems such as loose bolts and worn pins, ensuring that they remain in good working condition throughout the entire bridge construction period, providing a strong guarantee for the smooth construction of the bridge.

[0046] The working principle of the steel beam bracketless quick connection and positioning device provided by this utility model is as follows:

[0047] Professional construction workers tightly welded the back plate 301, connecting ear plate 302 and first stiffening plate 303 to the designated position on the top plate of the steel beam 2, ensuring that the welding quality meets the engineering standards to guarantee the stability of the subsequent connection.

[0048] Similarly, the double connecting clamp 304 and the second stiffening plate 305 are precisely welded to the bottom plate of the side tie beam 1. Attention should be paid to the positioning accuracy and welding parameter control during the welding process to prevent welding deformation from affecting subsequent installation.

[0049] Using large hoisting equipment, the steel beam 2 is smoothly hoisted to the vicinity of the design position. At this time, it is passed through the corresponding bolt holes by four positioning bolts 307 and then threaded with nuts 3071. The connecting ear plate 302 and the double connecting clamp plate 304 are then connected and fixed, thereby achieving a preliminary connection with the components already welded to the side tie beam 1 and realizing the rapid positioning of the steel beam 2. This step greatly improves the accuracy and efficiency of the installation and reduces the tedious measurement and adjustment steps in traditional construction.

[0050] After ensuring correct positioning, insert the connecting pin 306 into the pin hole, and extend the pin hole 3061 to the outside. Then, insert the cotter pin into the pin hole 3061. The position of the pin hole 3061 is fixed by the cooperation of the annular limiting plate 3062 and the cotter pin, so that the steel beam 2 and the side tie beam 1 form a tight and stable connection structure. At this time, the hook can be safely unloaded, completing the entire process of rapid connection and positioning of the steel beam 2 without support. The whole operation process is simple and smooth, effectively saving construction time and labor costs.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A quick connection and positioning device for steel crossbeams without supports, characterized in that, It includes a back plate (301), a connecting ear plate (302), a first stiffening plate (303), a double connecting clamp (304), a second stiffening plate (305), a connecting pin (306), and a positioning bolt (307); The bottom of the back plate (301), the connecting ear plate (302) and the first stiffening plate (303) are all fixedly welded to the top plate of the steel beam; One side of the connecting ear plate (302) and the first stiffening plate (303) are fixedly welded to one side of the back plate (301); two double connecting plates (304) are symmetrically arranged, and the bottom of the two double connecting plates (304) are fixedly welded to the bottom plate of the side tie beam. Two second stiffening plates (305) are symmetrically fixedly welded to one side of the double connecting plates (304), and the bottom of the second stiffening plates (305) are fixedly welded to the bottom plate of the side tie beam.

2. The steel beam bracketless quick connection and positioning device according to claim 1, characterized in that, The connecting ear plate (302) and the double connecting clamp plate (304) are both provided with a pin hole for installing the connecting pin (306). The connecting ear plate (302) and the double connecting clamp plate (304) are both provided with a bolt hole for installing the positioning bolt (307). There are four positioning bolts (307) and four bolt holes, which are provided in a one-to-one correspondence. One end of the positioning bolt (307) passes through the corresponding bolt hole and is threaded with a nut (3071). The bolt hole is adapted to the positioning bolt (307).

3. The steel beam supportless quick connection and positioning device according to claim 1, characterized in that, One end of the connecting pin (306) is fixedly connected to an annular limiting plate (3062), and the other end of the connecting pin (306) extends out through the pin hole and then passes through a pin hole (3061). A cotter pin that matches it is inserted into the pin hole (3061), and the connecting pin (306) matches the pin hole.

4. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, The back plate (301) is a rectangular steel plate with a thickness of not less than 10mm, a height of not less than 200mm, and a width of not less than 150mm.

5. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, The connecting ear plate (302) is a rectangular steel plate with a thickness of not less than 12mm, a height of not less than 180mm, and a width of not less than 120mm.

6. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, The double connecting plate (304) is a rectangular steel plate with a thickness of not less than 12mm, a height of not less than 180mm, and a width of not less than 120mm.

7. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, The first stiffening plate (303) is a triangular or rectangular steel plate with a thickness of not less than 8mm, a height of not less than 150mm, and a width of not less than 100mm.

8. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, The second stiffening plate (305) is a triangular or rectangular steel plate with a thickness of not less than 8mm, a height of not less than 150mm, and a width of not less than 100mm.

9. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, The connecting pin (306) is made of high-strength alloy steel, and its surface is hardened. Its diameter is not less than 30mm and its length is not less than 150mm. The positioning bolt (307) is a high-strength bolt with a strength grade of not less than 8.

8.

10. The quick connection and positioning device for steel crossbeams without supports according to claim 1, characterized in that, One end of the connecting ear plate (302) extends between two double connecting plates (304), and the distance between the two double connecting plates (304) is matched with the thickness clearance of the connecting ear plate (302), with a clearance value of 1-3mm.

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