Stud reverse thread tapping end plate splicing type round steel pipe splicing joint

Abstract

The invention discloses a double-end bolt reverse thread tapping end plate splicing type round steel pipe splicing joint which comprises a first end plate and a second end plate connected with the first end plate through a fixing piece. The second end plate is used for being connected with the end part of a second connecting pipe; after the end surfaces of the first end plate and the second end plate are aligned, the fixing piece extends into the first end plate and the second end plate at the same time and is connected with the first end plate and the second end plate, so that the first connecting pipe and the second connecting pipe are assembled; the first end plate and the second end plate are arranged at the end of the first connecting pipe and the end of the second connecting pipe respectively, the built-in double-end different-thread bolts are screwed synchronously and reversely, and reliable transmission of tension is achieved. Axial pressure is borne through the surface contact area of the two end plates, the protrusions and the concave holes are matched to transmit shearing force, and therefore a continuous and stable stress path is formed in the section of the first connecting pipe and the section of the second connecting pipe. According to the mechanical transmission mode, the joint can keep good overall cooperative performance under the combined action of various internal forces.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of structural engineering in the technical field of building engineering, in particular to a double-end bolt reverse thread tapping end plate splicing type circular steel pipe splicing joint. BACKGROUND

[0002] Circular steel pipes are widely used in high-rise buildings, bridge engineering and large-span spaces in the field of building structures due to their good mechanical properties, high material utilization rate, good local stability, convenient construction and installation, and beautiful appearance. Circular steel pipes not only have good axial force performance and torsional performance, but also can provide a smooth and soft aesthetic effect in the appearance of the building, and are particularly favored in public buildings and landmark structures that pursue visual artistic expression.

[0003] Under the condition of fabricated construction, circular steel pipes need to be manufactured in sections and spliced on site. The form of the on-site splicing joint of the circular steel pipe is directly related to the rationality of the stress of the structure, the convenience of construction, and the beauty of the building. Therefore, reliable and efficient connection between circular steel pipes is the key to ensuring the integrity of the structure and the feasibility of construction. An ideal splicing joint not only needs to efficiently transfer axial force, bending moment and shear force, but also needs to be simple and compact in structure to meet the comprehensive requirements of rapid assembly and detachable maintenance.

[0004] At present, the common circular steel pipe splicing methods in engineering mainly include flange end plate type joints and welded sleeve type joints. (1) The flange end plate type joint connects the two end plates by welding flanges on the upper and lower circular steel pipe ends and connecting them with high-strength bolts to realize force transmission. This connection method is relatively reliable in mechanical properties and can ensure the continuity of the stress of the joint. However, the size of the flange is usually significantly larger than the cross-section of the circular steel pipe, and the protruding part can easily form a protruding bulge, which destroys the continuity and simplicity of the circular steel pipe and makes it difficult to meet the requirements of visual aesthetics and spatial purity of the building. (2) The welded sleeve type joint connects the two sections of the circular steel pipe by wrapping a sleeve around the outside of the two sections and welding the ends. This type of joint is relatively direct in force transmission, but it requires a long sleeve lap section, which causes the diameter of the components at the joint to change abruptly, affecting the overall appearance and structural coordination of the structure. In addition, the quality of on-site welding is greatly affected by the working conditions, and there are problems such as deformation and complex defect detection, which are not conducive to construction quality control and post-maintenance.

[0005] In summary, the existing circular steel pipe splicing joints have the following shortcomings: (1) the joint is protruding, affecting the appearance and spatial integrity of the structure; (2) the on-site welding requirements are high, and the reliability of the joint is difficult to guarantee; (3) the construction process is complex, which is not conducive to rapid assembly and post-disassembly. In view of the above problems, it is urgent to develop a new type of splicing joint structure that maintains the integrity and coordination of the appearance of the circular steel pipe, reliably and efficiently transmits force, is convenient to install, and can be repeatedly disassembled. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is that the existing connection mode of the connected steel pipe destroys the integrity and coordination of the appearance, and the construction process is complex.

[0007] The above technical problem is solved by the following technical scheme: the present application provides a double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, which comprises a first end plate and a second end plate connected with the first end plate through a fixing piece. The first end plate is used for connecting the end of the first connecting pipe, and the second end plate is used for connecting the end of the second connecting pipe; after the end faces of the first end plate and the second end plate are aligned, the fixing piece is simultaneously inserted into the interiors of the first end plate and the second end plate and connected with them, so that the first connecting pipe and the second connecting pipe are assembled.

[0008] In a preferred mode of the double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, the cross-sectional shape of the first end plate is the same as that of the first connecting pipe, and the cross-sectional size of the first end plate is the same as that of the first connecting pipe.

[0009] In a preferred mode of the double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, the cross-sectional shape of the second end plate is the same as that of the second connecting pipe, and the cross-sectional size of the second end plate is the same as that of the second connecting pipe.

[0010] In a preferred mode of the double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, a boss is arranged at the center position of the end face of the first end plate.

[0011] In a preferred mode of the double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, a connecting groove is arranged at the center position of the end face of the second end plate, and the boss is matched with the connecting groove.

[0012] In a preferred mode of the double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, the edge position of the end face of the first end plate provided with the boss is provided with three groups of arc-shaped grooves, and the arc-shaped grooves are uniformly distributed along the edge position of the first end plate.

[0013] In a preferred mode of the double-headed bolt reverse thread tapping end plate spliced type round steel pipe joint, a first threaded hole is arranged at the center position of the end face of the arc-shaped groove, and three groups of first threaded holes are arranged.

[0014] In a preferred mode of the double-end bolt reverse thread tapping end plate spliced type round steel pipe joint of the application: the second end plate is provided with a second threaded hole in the end face of the connecting groove, the second threaded hole is provided with three groups, the thread direction of the first threaded hole and the second threaded hole is opposite, when the boss of the first end plate is inserted into the inner wall of the connecting groove of the second end plate, the end faces of the first end plate and the second end plate coincide and align, at this time, the center axis extension lines of the first threaded hole and the second threaded hole coincide; when the end faces of the first end plate and the second end plate coincide and align, the end face of the arc-shaped groove and the second end face corresponding to the end face of the arc-shaped groove jointly form an open type containing cavity.

[0015] In a preferred mode of the double-end bolt reverse thread tapping end plate spliced type round steel pipe joint of the application: the fixing member includes a bolt head, a first screw rod and a second screw rod respectively arranged on the two end faces of the bolt head; The center axis extension lines of the first screw rod and the second screw rod coincide.

[0016] In a preferred mode of the double-end bolt reverse thread tapping end plate spliced type round steel pipe joint of the application: the thread direction of the first screw rod and the second screw rod is opposite; the first screw rod is matched with the first threaded hole, and the second screw rod is matched with the second threaded hole; in the working state, the bolt head is located in the open type containing cavity, a tool is inserted into the open type containing cavity to contact and rotate the bolt head, so that the first screw rod is matched with the first threaded hole, and the second screw rod is matched with the second threaded hole.

[0017] The application has the advantages that: by arranging the first end plate and the second end plate at the end portions of the first connecting pipe and the second connecting pipe respectively, and synchronously reverse tightening the built-in double-end different thread bolt, the reliable transmission of the pulling force is realized; the face contact area of the two end plates bears the axial pressure, the convex and the concave hole cooperate to transmit the shear force, so that a continuous and stable stress path is formed inside the cross section of the first connecting pipe and the second connecting pipe. The mechanical transmission mode enables the joint to maintain good overall performance under the combined action of various internal forces; The bolt head adopts a hexagonal cross section design, can be directly screwed in and tightened by a wrench, and the construction process is simple and fast; the reverse thread matching structure of the first screw rod and the second screw rod enables the two ends to be synchronously clamped during assembly, effectively avoids the problems of bolt slipping and loosening, and guarantees the long-term reliability of the joint connection. In addition, the connection form is a detachable structure, which is convenient for later maintenance, replacement or reuse.

[0018] After assembly is completed, all the connecting members of the connection joint do not exceed the edge of the cross section of the first connecting pipe and the second connecting pipe, so that no component protrudes outward, and the smooth continuity and visual integrity of the round steel pipe are completely reserved Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall device connection state of the splicing node of the double-headed bolt reverse thread tapping end plate type round steel pipe is shown. Figure 2 This diagram shows a cross-sectional view of the connection node of the spliced ​​round steel pipe joint with the double-headed bolt reverse thread tapping end plate. Figure 3 This diagram shows the connection between the first end plate and the second end plate of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe splicing node; Figure 4 This diagram shows the connection between the second end plate and the second connecting pipe of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe splicing node; Figure 5 A schematic diagram of the fastener structure of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe is shown; Figure 6 A schematic diagram of the first end plate structure of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe is shown. Figure 7 The top view of the first end plate of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe is shown. Figure 8 The bottom view of the second end plate of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe is shown; Figure 9 A schematic diagram of the second end plate structure of the splicing node of the double-ended bolt reverse thread tapping end plate type round steel pipe is shown.

[0020] In the figure: 1. First end plate; 11. Boss; 12. Arc-shaped groove; 13. First threaded hole; 2. Fixing component; 21. Bolt head; 22. First screw; 23. Second screw; 3. Second end plate; 31. Connecting groove; 32. Second threaded hole; 4. Open-type receiving cavity; 5. First connecting pipe; 6. Second connecting pipe; 7. Weld. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0023] Reference Figure 1 and Figure 2 This embodiment provides a double-ended bolt reverse thread tapping end plate splicing node for round steel pipes, including a first end plate 1 and a second end plate 3 connected to the first end plate 1 by a fastener 2; The first end plate 1 is used to connect to the end of the first connecting pipe 5, and the second end plate 3 is used to connect to the end of the second connecting pipe 6. After the end faces of the first end plate 1 and the second end plate 3 are aligned, the fastener 2 simultaneously extends into the first end plate 1 and the second end plate 3 and connects with them, thus completing the assembly of the first connecting pipe 5 and the second connecting pipe 6. It should be noted that, referring to... Figure 3 and Figure 9 The edges of the first end plate 1 and the second end plate 3 are rounded to make the edges smooth.

[0024] Among them, reference Figure 1 and Figure 2 The cross-sectional shape of the first end plate 1 is the same as that of the first connecting pipe 5, and the cross-sectional dimensions of the first end plate 1 are the same as those of the first connecting pipe 5. The cross-sectional shape of the second end plate 3 is the same as that of the second connecting pipe 6, and the cross-sectional dimensions of the second end plate 3 are the same as those of the second connecting pipe 6. It should also be noted that the cross-sectional shape and dimensions of the first connecting pipe 5 and the second connecting pipe 6 are the same.

[0025] Furthermore, refer to Figure 6 and Figure 7 A boss 11 is provided at the center of the end face of the first end plate 1, and a connecting groove 31 is provided at the center of the end face of the second end plate 3. The boss 11 and the connecting groove 31 are adapted to each other.

[0026] Furthermore, the first end plate 1 has three sets of arc-shaped grooves 12 at the edge of the end face where the boss 11 is located, and the arc-shaped grooves 12 are evenly distributed along the edge of the first end plate 1. In this embodiment, the example is provided with three sets of arc-shaped grooves 12.

[0027] Furthermore, refer to Figure 4 , Figure 6 and Figure 7 The arc-shaped groove 12 has a first threaded hole 13 at its center end face, and there are 3 sets of the first threaded holes 13; refer toFigure 8 and Figure 9 The second end plate 3 has a second threaded hole 32 on its end face where the connecting groove 31 is provided. There are three sets of the second threaded hole 32, and the thread directions of the first threaded hole 13 and the second threaded hole 32 are opposite. It should be noted that the number of first threaded holes 13 and second threaded holes 32 is equal to the number of arc-shaped grooves 12. Therefore, this embodiment is illustrated by providing three sets of first threaded holes 13 and three sets of second threaded holes 32.

[0028] When using, refer to Figure 1 and Figure 2 When the boss 11 of the first end plate 1 is inserted into the inner wall of the connecting groove 31 of the second end plate 3, the end faces of the first end plate 1 and the second end plate 3 overlap and align. At this time, the extension lines of the central axes of the first threaded hole 13 and the second threaded hole 32 coincide. When the end faces of the first end plate 1 and the second end plate 3 overlap and align, the end face of the arc-shaped groove 12 and the second end face together form an open-type receiving cavity 4.

[0029] It should be noted that, referring to Figure 2 By setting the boss 11 to engage with the connecting groove 31, the first connecting pipe 5 and the second connecting pipe 6 can be limited, ensuring complete contact between the end faces of the first end plate 1 and the second end face. The axial pressure is borne by the surface contact area of ​​the two end plates, and the boss 11 and the connecting groove 31 cooperate to transmit shear force, thereby forming a continuous and stable force path within the cross-sections of the first connecting pipe 5 and the second connecting pipe 6. This mechanical transmission mode enables the node to maintain good overall cooperative performance under the combined action of multiple internal forces.

[0030] In some implementations, refer to Figure 5 The fastener 2 includes a bolt head 21 and a first screw 22 and a second screw 23 respectively disposed on both ends of the bolt head 21; the extended lines of the central axes of the first screw 22 and the second screw 23 coincide. The thread directions of the first screw 22 and the second screw 23 are opposite; the first screw 22 is adapted to the first threaded hole 13, and the second screw 23 is adapted to the second threaded hole 32.

[0031] It should be noted that setting the thread direction of the first screw 22 and the second screw 23 to opposite directions can ensure that both ends can be clamped simultaneously during assembly, while also avoiding bolt slippage and loosening, thus ensuring the long-term reliability of the node connection.

[0032] In the working state, the bolt head 21 is located in the open-type receiving cavity 4. A tool is inserted into the open-type receiving cavity 4 to contact the bolt head 21 and rotate the bolt head 21, so that the first screw 22 is assembled with the first threaded hole 13 and the second screw 23 is assembled with the second threaded hole 32.

[0033] Operation process: The end of the first connecting pipe 5 is welded to the end face of the first end plate 1 away from the arc-shaped groove 12, and a weld 7 is visible at the weld joint on its side wall. After welding, the boss 11 of the first end plate 1 faces outward. The end of the second connecting pipe 6 is welded to the end face of the second end plate 3 away from the connecting groove 31. After welding, a weld 7 is visible at the weld joint on its side wall, and the connecting groove 31 of the second end plate 3 faces outward. All the above operations are completed at the processing site. After processing, the first connecting pipe 5 and the second connecting pipe 6 are transported to the construction site.

[0034] When connecting the first connecting pipe 5 and the second connecting pipe 6, first place the second connecting pipe 6 perpendicular to the ground with the end connected to the second end plate 3 facing upwards. Then place the ends of all the second screws 23 into the corresponding second threaded holes 32.

[0035] Next, the end face of the first connecting pipe 5 connected to the first end plate 1 moves vertically downward. Please note that the first connecting pipe 5 should always remain perpendicular to the ground during the downward movement until all the ends of the first screws 22 are inserted into the corresponding first threaded holes 13 of the first end plate 1. Then, use a tool to clamp the bolt head 21 and rotate it until the boss 11 of the first end plate 1 is fully inserted into the connecting groove 31 of the second end plate 3. Since the size of the boss 11 and the connecting groove 31 match, the end face of the first end plate 1 with the boss 11 and the end face of the second end plate 3 with the connecting groove 31 are in contact. At this time, the edges of the first end plate 1 and the second end plate 3 are completely aligned, and the assembly work is completed.

[0036] After assembly, there are no protruding components at the connection node of the first connecting pipe 5 and the second connecting pipe 6. Along the axial direction of the first / second connecting pipe 6, the node length can be approximately estimated as "the thickness of the first end plate 1 + the thickness of the second end plate 3 + the height of the bolt head 21", which generally does not exceed 8cm. The structure is extremely compact and efficient, and the smooth continuity and visual integrity of the round steel pipe are completely preserved.

[0037] Furthermore, the assembly process is simpler and more convenient than on-site welding, making it easier for later maintenance, replacement, or reuse.

[0038] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A double-ended bolt reverse thread tapping end plate splicing joint for round steel pipes, characterized in that: It includes a first end plate (1) and a second end plate (3) connected to the first end plate (1) by a fastener (2); The first end plate (1) is used to connect to the end of the first connecting pipe (5), and the second end plate (3) is used to connect to the end of the second connecting pipe (6); After the end faces of the first end plate (1) and the second end plate (3) are aligned, the fastener (2) extends into the interior of the first end plate (1) and the second end plate (3) and connects with them, so that the first connecting pipe (5) and the second connecting pipe (6) are assembled.

2. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 1, characterized in that: The cross-sectional shape of the first end plate (1) is the same as that of the first connecting pipe (5), and the cross-sectional dimensions of the first end plate (1) are the same as those of the first connecting pipe (5).

3. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 2, characterized in that: The cross-sectional shape of the second end plate (3) is the same as that of the second connecting pipe (6), and the cross-sectional dimensions of the second end plate (3) are the same as those of the second connecting pipe (6).

4. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 3, characterized in that: A boss (11) is provided at the center of the end face of the first end plate (1).

5. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 4, characterized in that: A connecting groove (31) is provided at the center of the end face of the second end plate (3), and the boss (11) is adapted to the connecting groove (31).

6. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 5, characterized in that: The first end plate (1) is provided with a boss (11) and three sets of arc-shaped grooves (12) are provided at the edge of the end face. The arc-shaped grooves (12) are evenly distributed along the edge of the first end plate (1).

7. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 6, characterized in that: The arc-shaped groove (12) has a first threaded hole (13) at the center end face, and there are 3 sets of the first threaded hole (13).

8. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 7, characterized in that: The end face of the second end plate (3) with the connecting groove (31) is provided with a second threaded hole (32). There are 3 sets of the second threaded holes (32). The thread directions of the first threaded hole (13) and the second threaded hole (32) are opposite. When the boss (11) of the first end plate (1) is inserted into the inner wall of the connecting groove (31) of the second end plate (3), the end faces of the first end plate (1) and the second end plate (3) overlap and align, and at this time the central axis extension lines of the first threaded hole (13) and the second threaded hole (32) coincide. When the end faces of the first end plate (1) and the second end plate (3) overlap and align, the end face of the arc groove (12) and the second end face together form an open-type receiving cavity (4).

9. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 8, characterized in that: The fastener (2) includes a bolt head (21), a first screw (22) and a second screw (23) respectively disposed on both ends of the bolt head (21); The central axis extensions of the first screw (22) and the second screw (23) coincide.

10. The double-ended bolt reverse thread tapping end plate splicing type round steel pipe splicing node according to claim 9, characterized in that: The first screw (22) and the second screw (23) have opposite thread directions; The first screw (22) is adapted to the first threaded hole (13), and the second screw (23) is adapted to the second threaded hole (32); In the working state, the bolt head (21) is located in the open-type receiving cavity (4). A tool is inserted into the open-type receiving cavity (4) to contact the bolt head (21) and rotate the bolt head (21), so that the first screw (22) is assembled with the first threaded hole (13), and the second screw (23) is assembled with the second threaded hole (32).

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