A steel tube bundle connection structure

Abstract

The present invention discloses a steel pipe bundle connection structure, which comprises a plurality of pairwise-connected steel pipe bundle units. A connecting plate is arranged at the end of each steel pipe bundle unit. When connecting, the connecting plate of the previous steel pipe bundle unit and the connecting plate of the next steel pipe bundle unit are stacked against each other, and corresponding assembly holes are respectively formed in the two connecting plates. A shear-resistant bolt is screwed into each assembly hole from the outside of the steel pipe bundle. The shear-resistant bolt comprises a screw rod and a bolt head. The screw rod is successively divided into a cutting edge section, a thread extrusion section, and a thread expansion and tightening fit section from the end far away from the bolt head along the length direction of the screw rod. The assembly holes of the two connecting plates are cut into concentricity by the cutting edge section, and the inner wall of the hole is expanded by the action of the thread extrusion section to form an internal thread that has a clearance-free fit with the thread expansion and tightening fit section. A template is also arranged on the outside of the connecting plate. The template is arranged with a gap from the connecting plate, and a cavity is formed between the two. The bolt heads of each shear-resistant bolt are located in the cavity, and concrete is poured into the cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly relates to a steel tube bundle connection structure. Background Art

[0002] At present, steel structures are used more and more in the technical field of building structures, and various new steel structure forms are emerging continuously, with broad prospects. The steel tube bundle structure is a kind of steel structure. Compared with concrete building structures, it has better applicability and feasibility, such as reducing the volume of components, increasing the usable space; reducing the self-weight of the structure, reducing or completely eliminating the formwork and supports required for construction; reducing embedded parts and improving the seismic performance of the structure; facilitating construction and shortening the construction period.

[0003] When two traditional steel tube bundle structures are connected to each other, they mainly rely on the lining plate of the previous steel tube bundle unit and the flange of the next steel tube bundle unit to be first fixed by bolts, then welded into one body, and then grouted and formed inside the steel tube bundle unit. In this method, there are connection gaps in the bolt connection, reducing the reliability. Moreover, the on-site welding workload is large, the welding fume emission is large, which is not conducive to high-altitude operation, with high labor intensity and low construction efficiency. In addition, when bolt-connected, the bolt heads and some fine-tuning components are exposed, and over time, problems such as rust and looseness are likely to occur, reducing the connection strength and affecting the overall firmness. Therefore, further optimization is required. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel tube bundle connection structure, which optimizes the connection method between steel tube bundles, improves the connection strength of steel tube bundles, and avoids the exposure of some connecting parts.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A steel tube bundle connection structure includes a number of steel tube bundle units connected to each other in sequence. A connecting plate is provided at the end of each steel tube bundle unit. When connecting, the connecting plate of the previous steel tube bundle unit and the connecting plate of the next steel tube bundle unit are stacked against each other, and corresponding assembly holes are respectively formed on the two connecting plates. A shear bolt is screwed into each assembly hole from the outside of the steel tube bundle. The shear bolt includes a screw rod and a bolt head. The screw rod is sequentially divided into a cutting edge section, a thread extrusion section, and a thread expansion and tight fit section along the length direction from the end far away from the bolt head. The assembly holes of the two connecting plates are cut by the cutting edge section to have the same concentricity, and the hole walls are expanded by the action of the thread extrusion section to form an internal thread that has a clearance-free fit with the thread expansion and tight fit section. A template is further provided on the outside of the connecting plate. The template is arranged at a gap with the connecting plate, and a cavity is formed between the two. The bolt heads of each shear bolt are located in the cavity, and concrete is poured in the cavity.

[0007] Particularly, the cutting edge section is in a tapered tip shape and is formed with a cutting edge opening.

[0008] In particular, the surface of the thread extrusion section is a conical surface, on which there is a thread extrusion thread that is consistent with the minor diameter of the thread expansion and tightening section and has the same tooth profile, and the width of the thread groove of the thread extrusion thread gradually narrows from the thread expansion and tightening section to the cutting edge section.

[0009] In particular, there is also a guiding section connected between the cutting edge section and the thread extrusion section, and the guiding section is a smooth cylindrical surface.

[0010] In particular, a steel bar mesh is arranged in the groove cavity along the outer wall of the steel pipe bundle. There are two layers of the steel bar mesh, which are respectively located on the upper side and the lower side of the connecting plate.

[0011] In particular, the steel bar mesh includes corrugated steel bars and straight steel bars. The corrugated steel bars are horizontally welded to the steel pipe bundle, and the straight steel bars are welded to the outer edge of the corrugated steel bars.

[0012] In particular, the connecting plates are arranged in pairs at the ends of the steel pipe bundle units. They are divided into two inner and outer layers. Anti-expansion bolts are used to pass through the connecting plates on both sides to form a fastening, and the ends of the anti-expansion bolts are also located in the groove cavity.

[0013] In particular, a gap adjusting device is also arranged between two steel pipe bundle units, and the gap adjusting device is located in the groove cavity.

[0014] In summary, the beneficial effects of the present invention are as follows. Compared with the prior art, the steel pipe bundle connection structure of the present invention designs a unique shear bolt to simply solve the problems of errors and misalignment in the dimensions of the assembly holes, eliminate the assembly gap, improve the connection effect, and wrap it with concrete on the outside, so that the protruding parts are buried in the concrete to play an anti-rust and fixing role, strengthen the connection strength, realize simple and rapid construction on site, and ensure reliable connection. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the steel pipe bundle connection structure provided by the embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the structure of the shear bolt in the steel pipe bundle connection structure provided by the embodiment of the present invention;

[0017] Figures 3 - 4 is an assembly schematic diagram of the shear bolt in the steel pipe bundle connection structure provided by the embodiment of the present invention;

[0018] Figure 5 is a schematic diagram of the use of the steel pipe bundle connection structure in the construction of an L-shaped steel pipe bundle provided by the embodiment of the present invention;

[0019] Figure 6 is a schematic diagram of the use of the steel pipe bundle connection structure in the construction of a T-shaped steel pipe bundle provided by the embodiment of the present invention. Detailed Embodiments

[0020] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0021] Please refer to Figure 1 As shown, this embodiment provides a steel pipe bundle connection structure, which includes a number of steel pipe bundle units 1 that are connected to each other in pairs. A connecting plate 2 is provided at the end of each steel pipe bundle unit 1. When connecting, the connecting plate 2 of the previous steel pipe bundle unit 1 is stacked against the connecting plate 2 of the next steel pipe bundle unit 1, and corresponding assembly holes are respectively formed in the two connecting plates 2.

[0022] A shear bolt 3 is screwed into each assembly hole from the outside of the steel pipe bundle. It is worth mentioning that the shear bolt 3 here includes a screw rod and a bolt head 31. The screw rod is successively divided into a cutting edge section 32, a guiding section 33, a thread extrusion section 34, and a thread expansion and fitting section 35 from the end far away from the bolt head 31 along the length direction of the screw rod. As Figure 2 shown, the assembly holes of the two connecting plates 2 are cut by the cutting edge section 32 to have the same concentricity, and the inner wall of the hole is expanded by the action of the thread extrusion section 34 to form an internal thread that has a clearance-free fit with the thread expansion and fitting section 35.

[0023] The cutting edge section 32 is in a tapered tip shape and is formed with a cutting edge 36. During the feeding process of the bolt, the cutting edge 36 can cut off the protruding part. Figure 3 and 4 The shaded parts shown in are the protruding parts to be cut, meeting the dimensional requirements of the assembly hole and improving the positional accuracy.

[0024] The guiding section 33 is a smooth cylindrical surface, which is used for positioning and guiding the feeding of the bolt.

[0025] The surface of the thread extrusion section 34 is a conical surface, and the taper angle of the conical surface is preferably 2° to 8°. The thread extrusion section 34 is provided with a thread extrusion 37 that is the same as the minor diameter of the external thread 38 and has the same tooth profile. Moreover, the width of the thread groove of the thread extrusion 37 gradually narrows from the thread expansion and fitting section 35 to the cutting edge section 32. As the thread extrusion section 34 penetrates deeper, an internal thread can be formed on the inner wall of the assembly hole after cutting, forming a screw hole with a higher degree of fit.

[0026] The thread expansion and fitting section 35 is in a cylindrical shape, and the surface is provided with an external thread 38 that fits with the screw hole. The thread angles of both the external thread 38 and the thread extrusion 37 are 60°. Thus, during assembly, the assembly problems caused by aperture differences or non-concentricity can be significantly improved.

[0027] A template 4 is further provided on the outside of the connecting plate 2. The template 4 is arranged with a gap from the connecting plate 2, and a cavity is formed between the two. The bolt heads 31 of the respective shear bolts 3 are located in the cavity, and concrete 5 is poured into the cavity.

[0028] A steel bar mesh 6 is arranged in the groove cavity and along the outer wall of the steel pipe bundle. The steel bar mesh 6 is provided with two layers, which are respectively located on the upper side and the lower side of the connecting plate 2, so as to make the connection with the steel pipe bundle firm. In particular, the steel bar mesh 6 includes corrugated steel bars 61 and straight steel bars 62. The corrugated steel bars 61 are horizontally welded to the steel pipe bundle, and the straight steel bars 62 are welded to the outer edge of the corrugated steel bars 61.

[0029] In addition, the connecting plates 2 are arranged in pairs at the ends of the steel pipe bundle units 1, and are divided into two inner and outer layers. Anti-expansion bolts 7 are used to pass through the connecting plates 2 on both sides to form a fastening. A gap adjusting device 8 is also arranged between the two steel pipe bundle units 1. The ends of the anti-expansion bolts 7 and the gap adjusting device 8 are both located in the groove cavity, so that some exposed connecting parts are wrapped by the concrete 5 during pouring to achieve protection, and it is equivalent to a floor waistline in appearance and does not affect the building appearance.

[0030] The above structure is applicable to the installation of steel pipe bundles in shapes such as straight, L-shaped, and T-shaped. Except for arranging the shear bolts 3, only the steel bar mesh 6 and the formwork 4 need to be adaptively added along the outside of the steel pipe bundle, as shown in Figure 5 and Figure 6 shown.

[0031] In summary, the described steel pipe bundle connection structure designs a unique shear bolt to simply solve the problems of errors and misalignment in the assembly hole size, eliminate the assembly gap, improve the connection effect, and wrap the protruding parts with concrete on the outside to make the protruding parts buried in the concrete play an anti-rust and fixing role, strengthen the connection strength, realize simple and rapid construction on site, and ensure reliable connection.

[0032] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel tube bundle connection structure, characterized in that, it includes a number of steel tube bundle units connected to each other in pairs. A connecting plate is provided at the end of each steel tube bundle unit. When connecting, the connecting plate of the previous steel tube bundle unit is stacked against the connecting plate of the next steel tube bundle unit, and corresponding assembly holes are respectively opened on the two connecting plates. A shear bolt is screwed into each assembly hole from the outside of the steel tube bundle. The shear bolt includes a screw rod and a bolt head. The screw rod is successively divided into a blade section, a thread extrusion section, and a thread expansion and tightening fit section along the length direction from the end far away from the bolt head. The assembly holes of the two connecting plates are cut by the blade section to have the same concentricity, and the hole walls are expanded by the action of the thread extrusion section to form an internal thread that has a clearance-free fit with the thread expansion and tightening fit section. A template is also provided on the outside of the connecting plate. The template is arranged with a gap from the connecting plate, and a cavity is formed between the two. The bolt heads of each shear bolt are located in the cavity, and concrete is poured in the cavity; the blade section is in a conical tip shape and is formed with a cutting edge; the surface of the thread extrusion section is a conical surface, and it is provided with thread extrusion threads that are the same as the minor diameter of the thread of the thread expansion and tightening fit section and have the same tooth profile, and the thread groove width of the thread extrusion thread gradually narrows from the thread expansion and tightening fit section to the blade section.

2. The steel tube bundle connection structure according to claim 1, characterized in that: a guiding section is also connected between the blade section and the thread extrusion section, and the guiding section is a smooth cylindrical surface.

3. The steel tube bundle connection structure according to claim 1, characterized in that: a steel bar mesh is arranged in the cavity along the outer wall of the steel tube bundle. The steel bar mesh has two layers, which are respectively located on the upper side and the lower side of the connecting plate.

4. The steel tube bundle connection structure according to claim 3, characterized in that: the steel bar mesh includes corrugated steel bars and straight steel bars. The corrugated steel bars are horizontally welded to the steel tube bundle, and the straight steel bars are welded to the outer edge of the corrugated steel bars.

5. The steel tube bundle connection structure according to claim 1, characterized in that: the connecting plates are arranged in pairs at the ends of the steel tube bundle units, divided into an inner layer and an outer layer, and are fastened by passing an anti-expansion bolt through the connecting plates on both sides, and the end of the anti-expansion bolt is also located in the cavity.

6. The steel tube bundle connection structure according to claim 1, characterized in that: a gap adjusting device is also provided between the two steel tube bundle units, and the gap adjusting device is located in the cavity.

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