A steel pipe intersecting connection structure
By creating perforations in the sidewall of the main circular pipe and welding the connectors, combined with the design of screws, bolt holes, clamps, and bolts, the problem of difficult connection of circular steel pipes in the prior art is solved, and a rapid and well-sealed intersecting connection of circular steel pipes is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 安徽伟宏钢结构集团股份有限公司
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-03
AI Technical Summary
Existing intersecting steel pipe connection structures are only suitable for rectangular steel pipes and cannot effectively connect circular steel pipes.
A connection structure comprising a main circular pipe and a branch circular pipe was designed. By opening a first through hole in the side wall of the main circular pipe and welding a connector, the pipes are fixed with screws and screw holes. Combined with clamps and bolts, the circular steel pipes are quickly connected. A sealing gasket is placed at the connection to increase the sealing performance.
It enables a fast, convenient, and well-sealed intersecting connection of round steel pipes, and is suitable for connecting steel pipes of different shapes.
Smart Images

Figure CN224453314U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel pipe connection, and more particularly to a steel pipe intersecting connection structure. Background Technology
[0002] In steel structure engineering, intersecting steel pipe connections are a common type of connection, widely used in construction, bridges, machinery and other fields. Existing intersecting steel pipe connection structures are usually manufactured by directly welding the branch pipes to the main pipe.
[0003] A steel pipe intersecting connection structure, Chinese Patent No. CN220748730U, describes a method that involves welding two angle bracket bodies to the slot on a first steel pipe and two connecting L-shaped steel bars to a second steel pipe. The second steel pipe is then inserted into the slot until the connecting L-shaped steel bars fit over the angle bracket bodies. Two long bolts are then passed through the two angle bracket bodies, the two connecting L-shaped steel bars, and the second steel pipe, and tightened. Finally, diagonal bracing components are installed on both sides of the second steel pipe. This method achieves the goal of reinforcing the connection point of the two steel pipes with angle brackets and further reinforcing the connection point with diagonal bracing, thus eliminating the need for full welding and improving the efficiency of intersecting steel pipe connections.
[0004] The connection structure in the aforementioned comparative documents is only applicable to rectangular steel pipes, while most steel pipes used in reality are round, so this structure cannot be applied to round steel pipes. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a steel pipe intersecting connection structure, which solves the problems mentioned in the background.
[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a steel pipe intersecting connection structure, including a round main pipe, a round branch pipe detachably connected to the round main pipe, a first through hole symmetrically opened on the side wall of the round main pipe, a connector welded to the inner wall of the first through hole, a first screw hole symmetrically opened on the side wall of the connector, a screw threaded into the first screw hole, a second screw hole symmetrically opened on the side wall of the round branch pipe near the connector, a positioning structure detachably connected to the surface of the round main pipe and the round branch pipe, the positioning mechanism including a first clamp symmetrically fitted at the joint of the surface of the round main pipe and the round branch pipe, a second extension block matching the surface of the round branch pipe welded to the upper and lower ends of the first clamp, a first connecting block symmetrically fixedly connected to both sides of the second extension block, and a first bolt threadedly connected to the first connecting block.
[0007] As a further technical solution of this utility model, a sealing gasket is fixedly connected to the inner wall of the second extension block, and a sealing ring is fitted at the joint between the surface of the circular branch pipe and the connector.
[0008] As a further technical solution of this utility model, the top section of the connector head is kept horizontally aligned with the highest point of the side wall of the circular main tube.
[0009] As a further technical solution of this utility model, a square main pipe is placed on the side of the round main pipe, and a square branch pipe is detachably connected to the square main pipe. The side wall of the square main pipe is symmetrically provided with a second through hole that matches the square branch pipe.
[0010] As a further technical solution of this utility model, the surface of the square main pipe and the square branch pipe are detachably connected with a second clamp, and the upper and lower ends of the second clamp are welded with a first extension block.
[0011] As a further technical solution of this utility model, the two ends of the first extension block are symmetrically fixedly connected with second connecting blocks, and the second connecting blocks are threadedly connected with second bolts.
[0012] This utility model provides a steel pipe intersecting connection structure, which has the following advantages compared with the prior art:
[0013] This design presents a steel pipe intersecting connection structure. A circular branch pipe is inserted into the first through hole on the circular main pipe, with its surface tightly fitted to the inner wall of the connector via a sealing ring. The circular branch pipe and the circular main pipe are then fixed together using screws and threaded connections in the first screw holes. A circular branch pipe is also connected to the bottom of the circular main pipe in the same manner, completing the intersecting connection of the circular steel pipes. Two first clamps are then fitted onto the joint surfaces of the circular main pipe and the circular branch pipe, and spliced together using first connecting blocks. Finally, they are fixed with first bolts. The inner wall of the first connecting blocks is equipped with a sealing gasket to enhance the sealing of the joint surface. Square pipes can be intersected in a similar manner. A square branch pipe is inserted into the second through hole on the square main pipe, and a second clamp is fitted onto the joint surface. The joint is then fixed by threaded connections using second connecting blocks and second bolts, allowing for quick connection. This method enables rapid and convenient intersecting connections of both circular and square steel pipes. Attached Figure Description
[0014] Figure 1 An exploded view of a circular steel pipe intersecting connection structure.
[0015] Figure 2 A schematic diagram of the intersecting connection of circular steel pipes in a steel pipe intersecting connection structure;
[0016] Figure 3 This is a schematic diagram of a square steel pipe intersecting connection structure.
[0017] Figure 4 This is a schematic diagram of a limiting mechanism for intersecting square steel pipes in a steel pipe intersecting connection structure.
[0018] In the diagram: 1. Round main pipe; 2. Round branch pipe; 3. Connector; 4. First screw hole; 5. Screw; 6. First clamp; 7. First connecting block; 8. First bolt; 9. Square main pipe; 10. Square branch pipe; 11. Second clamp; 12. First extension block; 13. Second connecting block; 14. Second bolt; 15. Sealing gasket; 16. Second screw hole; 17. Sealing ring; 18. Second extension block; 19. First perforation. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0020] Please see Figures 1-2 This utility model provides a technical solution for a steel pipe intersecting connection structure: it includes a round main pipe 1, a round branch pipe 2 detachably connected to the round main pipe 1, a first through hole 19 symmetrically opened on the side wall of the round main pipe 1, a connector 3 welded to the inner wall of the first through hole 19, a first screw hole 4 symmetrically opened on the side wall of the connector 3, a screw 5 threaded into the first screw hole 4, a second screw hole 16 symmetrically opened on the side wall of the round branch pipe 2 near the connector 3, and a positioning structure detachably connected to the surface of the round main pipe 1 and the round branch pipe 2. The positioning mechanism includes a first clamp 6 symmetrically fitted at the joint of the surface of the round main pipe 1 and the round branch pipe 2, a second extension block 18 matching the surface of the round branch pipe 2 welded to the upper and lower sections of the first clamp 6, a first connecting block 7 symmetrically fixedly connected to both sides of the second extension block 18, and a first bolt 8 threadedly connected to the first connecting block 7.
[0021] Please see Figures 1-2 The inner wall of the second extension block 18 is fixedly connected with a sealing gasket 15, and a sealing ring 17 is fitted at the point where the surface of the circular branch pipe 2 and the connector 3 are engaged. The top section of the connector 3 is level with the highest point of the side wall of the circular main pipe 1.
[0022] Please see Figures 3-4 A square main pipe 9 is placed on the side of the round main pipe 1. A square branch pipe 10 is detachably connected to the square main pipe 9. The side wall of the square main pipe 9 is symmetrically provided with a second through hole that matches the square branch pipe 10. A second clamp 11 is detachably connected to the surface of the square main pipe 9 and the square branch pipe 10. A first extension block 12 is welded to the upper and lower sections of the second clamp 11. A second connecting block 13 is symmetrically fixed to both ends of the first extension block 12. A second bolt 14 is threaded onto the second connecting block 13.
[0023] The working principle of this utility model is as follows: The round branch pipe 2 is inserted into the first through hole 19 on the round main pipe 1, and the surface is tightly fitted with the inner wall of the connector 3 through the sealing ring 17. Then, the round branch pipe 2 and the round main pipe 1 are fixed by the screw 5 and the first screw hole 4. The round branch pipe 2 is also connected to the bottom of the round main pipe 1 in the same way. At this time, the intersecting connection of the round steel pipe is completed. Then, the two first clamps 6 are respectively put on the surface of the connection between the round main pipe 1 and the round branch pipe 2, and spliced by the first connecting block 7. Then, they are fixed by the first bolt 8. The inner wall of the first connecting block 7 is provided with a sealing gasket 15, which can increase the sealing of the surface of the connection between the round main pipe 1 and the round branch pipe 2. The square pipe can be connected in a similar way. The square branch pipe 10 is inserted into the second through hole on the square main pipe 9, and the second clamp 11 is put on the surface of the connection. It is fixed by the second connecting block 13 and the second bolt 14. The connection can be completed quickly. Through the above method, the round steel pipe and the square steel pipe can be connected quickly and conveniently in a similar way.
[0024] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.
Claims
1. A steel pipe intersecting connection structure comprising a circular main pipe (1), characterized by, A circular branch pipe (2) is detachably connected to the circular main pipe (1). A first through hole (19) is symmetrically opened on the side wall of the circular main pipe (1). A connector (3) is welded to the inner wall of the first through hole (19). A first screw hole (4) is symmetrically opened on the side wall of the connector (3). A screw (5) is threaded into the first screw hole (4). A second screw hole (16) is symmetrically opened on the side wall of the circular branch pipe (2) near the connector (3). A positioning structure is detachably connected to the surface of the circular main pipe (1) and the circular branch pipe (2). The positioning mechanism includes a first clamp (6) symmetrically fitted at the joint of the surface of the circular main pipe (1) and the circular branch pipe (2). A second extension block (18) matching the surface of the circular branch pipe (2) is welded to the upper and lower sections of the first clamp (6). A first connecting block (7) is symmetrically fixedly connected to both sides of the second extension block (18). A first bolt (8) is threadedly connected to the first connecting block (7).
2. A tubular X-joint structure according to claim 1, characterized by A sealing gasket (15) is fixedly connected to the inner wall of the second extension block (18), and a sealing ring (17) is fitted at the point where the surface of the circular branch pipe (2) and the connector (3) are engaged.
3. The steel tubular joint structure of claim 1, wherein The top section of the connector (3) is level with the highest point of the side wall of the circular main pipe (1).
4. A tubular joint structure according to claim 1, wherein A square main pipe (9) is placed on the side of the round main pipe (1), and a square branch pipe (10) is detachably connected to the square main pipe (9). The side wall of the square main pipe (9) is symmetrically provided with a second perforation that matches the square branch pipe (10).
5. A tubular joint structure according to claim 4, wherein The surface of the main square pipe (9) and the branch square pipe (10) is detachably connected to a second clamp (11), and the upper and lower ends of the second clamp (11) are welded with a first extension block (12).
6. A tubular joint structure according to claim 5, wherein The first extension block (12) is symmetrically fixedly connected to the two ends of the second connecting block (13), and the second connecting block (13) is threaded with the second bolt (14).