Fabricated connecting joint of steel pipe structure

Abstract

The utility model provides a steel pipe structure assembly type connecting joint which is suitable for the field of building structures and particularly comprises trusses, roof trusses and the like in the building structures. According to the technical scheme, at the joint position, a main pipe is provided with a spherical hoop, the spherical surface of the hoop is provided with a bolt hole to be connected with an auxiliary pipe, and the main pipe at the hoop position is continuous or spliced; compared with the prior art, the connecting structure has the beneficial effects that by combining the prior art and utilizing a special structure, rod piece level on-site rapid splicing can be achieved, it can be guaranteed that the joints of main pipe pieces are continuous or equal in strength, the connecting problem between the round pipes is well solved, and the round pipes which are good axis stress components are not prone to deformation. The steel pipe can be used for splicing structures in a large area, and various plane and space steel pipe structure types are achieved.

Description

Technical Field

[0001] The present invention is applicable to the field of building structures, specifically including trusses, roof trusses, etc. in building structures. Background Art

[0002] Currently, for a planar truss and roof truss in the field of building structures, due to reasons such as the simplicity and reliability of the connection nodes between members, angle steel (or combined angle steel) is selected as the member unit, combined with a planar gusset plate or a node connector welded with a steel plate, and welded or bolted connections are used to form an integral structure. This kind of structure has the characteristics of single-member modularization, light weight, simple node structure, and convenient assembly, and is especially suitable for the structural form of small-piece transportation and manual assembly. However, this kind of structure has a great disadvantage. As the main stress-bearing member unit, angle steel has a small cross-sectional moment of inertia and is a non-polar axisymmetric member, which is not the best choice for axially loaded members. Under the same cross-sectional dimensions and steel consumption, its bearing capacity is low, and it is more likely to be damaged under the same load.

[0003] Based on the theoretical basis of mechanics of materials, a circular tube section is polar axisymmetric and has a relatively large moment of inertia under the same cross-sectional area, which is the first choice for axially loaded members. However, due to the complexity, particularity of its node connection and stress characteristics, etc., it is mostly used in specific structural forms such as welded pipe trusses and space grids in the building field. The welded pipe truss has relatively complex processing and production, and there are certain problems with the durability of a large number of welds in special environments; the space grid is a specific structural form, the grid members are all disconnected at the nodes, it is difficult for bolted ball joints to achieve equal-strength connection, and there are a large number of on-site welding operations for welded ball joints, with complex construction and high requirements for quality control. Summary of the Invention

[0004] The purpose of the present invention is to provide an assembled connection node that is convenient to install and has reliable stress, and is used for connecting members in a steel pipe structure.

[0005] The present invention is achieved by the following measures: A prefabricated connection node for a steel pipe structure, characterized in that it is divided into two cases: the main pipe is continuous at the connection node and the main pipe is discontinuous at the connection node. When the main pipe is continuous at the connection node, a spherical clamp with a cylindrical cross-sectional inner hole is arranged on the continuous main pipe; when the main pipe is discontinuous at the connection node, a spherical clamp with a drum-shaped cross-sectional inner hole is arranged on the spliced main pipe, bolt holes are arranged on the spherical surface of the clamp for connecting with the secondary pipe, and the horizontal tie rod, cross bracing, and purlin support are directly connected to the bolt holes on the spherical surface of the clamp through bolts or connected through bolts between the bolt holes and the fasteners.

[0006] Both the spherical clamp with a cylindrical cross-sectional inner hole and the spherical clamp with a drum-shaped cross-sectional inner hole are two symmetrical fasteners. The fasteners are symmetrically provided with bolt holes through local cutting and outward protrusion. The two fasteners are connected and fixed to the main pipe through bolts, and the fasteners can rotate around the main pipe at any angle before tightening.

[0007] The inner hole of the spherical clamp with a cylindrical cross-section inner hole is a cylindrical cross-section, and the inner hole of the spherical clamp with a drum-shaped cross-section inner hole is a drum-shaped cross-section that is smaller at both ends and larger in the middle. Bolt holes are provided on the spherical surface of the clamp according to the spatial position of the branch pipe. The end part of the bolt hole is locally milled flat, and the bolt specifications at the end of the bolt hole correspond to those of the end of the branch pipe.

[0008] When the main pipe is continuous at the connection node, the inner diameter of the fastener of the spherical clamp with a cylindrical cross-section inner hole is the same as the outer diameter of the main pipe, and the arc length is less than half of the circumference of the main pipe; when the main pipe is spliced at the connection node, a tapered inner lining is connected to the end of the main pipe. The tapered inner lining and the main pipe can be integrally connected by welding or threading. The end is flush and the outer circle is smooth. The two spliced main pipes are tightened against each other and connected through the spherical clamp with a drum-shaped cross-section inner hole.

[0009] Textures can be provided on the outer wall of the continuous main pipe, the spliced main pipe and the inner wall of the fastener. The textures are planar strips or space curves.

[0010] According to the spatial position, the branch pipe is connected to the bolt hole on the spherical surface of the clamp at an arbitrary angle. The connection between the branch pipe and the spherical surface of the clamp is the same as that of the bolt ball joint or welded ball joint in the space grid structure, which belongs to the prior art. The horizontal tie rod, cross bracing, and purlin support can be of any cross-sectional shape and spatial position.

[0011] A T-shaped or Y-shaped joint, characterized in that a spherical clamp is provided on the main pipe, and bolt holes are provided on the clamp to form a T-shaped or Y-shaped connection with the branch pipe.

[0012] An X-shaped joint, characterized in that a spherical clamp is provided on the main pipe, and bolt holes are provided on the clamp to form an X-shaped connection with the branch pipe.

[0013] A K-shaped joint, characterized in that a spherical clamp is provided on the main pipe, and bolt holes are provided on the clamp to form a K-shaped connection with the branch pipe.

[0014] A TT-shaped joint, characterized in that a spherical clamp is provided on the main pipe, and bolt holes are provided on the clamp to form a TT-shaped connection with the branch pipe.

[0015] A KK-shaped joint, characterized in that a spherical clamp is provided on the main pipe, and bolt holes are provided on the clamp to form a KK-shaped connection with the branch pipe.

[0016] The above T-shaped or Y-shaped joints, X-shaped joints, K-shaped joints, TT-shaped joints, and KK-shaped joints are all divided into two cases: the main pipe is continuous and not disconnected at the connection node and the main pipe is disconnected and not continuous at the connection node. When the main pipe is continuous and not disconnected at the connection node, a spherical clamp with a cylindrical cross-section inner hole is provided for the continuous main pipe. When the main pipe is disconnected and not continuous at the connection node, a spherical clamp with a drum-shaped cross-section inner hole is provided for the spliced main pipe. Equal-strength connection of the main pipe can be achieved at the clamp.

[0017] The described node installation method, taking the case where the main pipe is discontinuous at the connection node as an example, is specifically as follows: Align and tightly press the two spliced main pipes, fasten the two fasteners in a butted manner, and connect them into an integral whole through bolts to achieve the connection of the main pipe; the auxiliary pipe, horizontal tie rod, cross bracing, and purlin support are connected to the fastener through high-strength bolts.

[0018] In the prior art, the connection of steel pipes is mostly carried out by intersecting welding, flange connection, or bolt ball connection. The intersecting welding process is relatively complex, and the assembly at the member level can only be completed in the factory, which is particularly disadvantageous for on-site assembly at the construction site during the transportation of small parts; the flange connection can only achieve the elongation of unidirectional members; the bolt ball connection is only used for specific structural forms such as space grid structures, and it is relatively difficult to achieve equal-strength connection in the main direction at the node when the stress is large. Compared with the prior art, the beneficial effects of the present invention are: Combining the prior art and using a special structure, it can achieve rapid on-site assembly at the member level, ensure continuity or equal strength at the node for the main pipe, and well solve the connection problem between steel pipes, enabling steel pipes, which are good axially loaded members, to be widely used in assembled structures to achieve various planar and spatial structural forms, such as trusses, roof trusses, etc. in the field of building structures. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of a typical node where the main pipe is continuous at the node without disconnection;

[0020] Figure 2 It is a schematic diagram of a typical node where the main pipe is discontinuous at the node;

[0021] Figure 3 It is a schematic diagram of a T-shaped node;

[0022] Figure 4 It is a schematic diagram of an X-shaped node;

[0023] Figure 5 It is a schematic diagram of a K-shaped node;

[0024] Figure 6 It is a schematic diagram of a TT-shaped node;

[0025] Figure 7 It is a schematic diagram of a KK-shaped node;

[0026] Figure 8 It is a schematic diagram of all nodes on the upper chord of a roof truss;

[0027] Among them, the reference numerals are: 1, continuous main pipe; 2, spherical clamp with inner hole in columnar section; 3, auxiliary pipe; 4, tapered lining; 5, horizontal tie rod; 6, cross bracing; 1a, spliced main pipe; 2a, spherical clamp with inner hole in drum-shaped section; 7, purlin support. Detailed Implementation Manner

[0028] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation manners.

[0029] Example 1:

[0030] Refer to Figure 1 , a prefabricated connection joint for a steel pipe structure. The main pipe is continuous at the joint without interruption. A spherical clamp 2 with a cylindrical cross-section inner hole is provided at the joint of the continuous main pipe 1. The spherical clamp consists of two symmetrical fasteners. The fasteners are symmetrically provided with bolt holes through local removal and protrusion. The inner diameter of the fastener is the same as the outer diameter of the main pipe, and the arc length is less than half of the circumference of the main pipe. The two fasteners are connected and fixed to the main pipe by tightening bolts. Before tightening the bolts, the fasteners can rotate around the main pipe at any angle. After tightening the bolts, there is a gap between the two fasteners to ensure that the fasteners and the main pipe are fully fixed by tightening the bolts.

[0031] The inner hole of the fastener of the spherical clamp 2 with a cylindrical cross-section inner hole is of a cylindrical cross-section. Bolt holes are provided on the spherical surface of the clamp according to the spatial position of the branch pipe. The ends of the bolt holes are partially milled flat, and the bolt specifications of the bolt holes correspond to those of the ends of the branch pipe.

[0032] Textures can be set on the outer wall of the main pipe and the inner wall of the fastener at the joint of the main pipe. The textures are planar strips or spatial curves. Setting the textures can effectively increase the friction between the fastener and the main pipe.

[0033] According to the spatial position, the branch pipe 3 can be connected to the bolt holes on the spherical surface of the clamp; the connection between the branch pipe 3 and the clamp is the same as that of the bolt ball joint or welded ball joint in the building grid structure.

[0034] Example 2:

[0035] Refer to Figure 2 , a prefabricated connection joint for a steel pipe structure. The main pipe is discontinuous at the joint. A spherical clamp 2a with a drum-shaped cross-section inner hole is provided at the joint of the spliced main pipe 1a. The spherical clamp consists of two symmetrical fasteners. The fasteners are symmetrically provided with bolt holes through local removal and protrusion. The inner hole of the fastener is of a drum-shaped cross-section with smaller ends and a larger middle part. A conical inner liner 4 is connected to the end of the main pipe. The conical inner liner and the main pipe can be integrally connected by welding or threading. The ends are flush and the outer circle is smooth. The two main pipes are tightly abutted and connected through the spherical clamp. Before tightening the bolts, the fasteners can rotate around the main pipe at any angle. After tightening the bolts, there is a gap between the two fasteners to ensure that the fasteners and the main pipe are fully fixed by tightening the bolts.

[0036] The inner hole of the fastener of the spherical clamp 2a with a drum-shaped cross-section inner hole is of a drum-shaped cross-section with smaller ends and a larger middle part. Bolt holes are provided on the spherical surface of the clamp according to the spatial position of the branch pipe 3. The ends of the bolt holes are partially milled flat, and the bolt specifications of the bolt holes correspond to those of the ends of the branch pipe.

[0037] The connection between the end of the spliced main pipe 1a and the conical inner liner 4 can be a welded connection or a threaded connection.

[0038] According to the spatial position, the auxiliary pipe 3 can be connected to the bolt holes on the spherical surface of the clamp; the connection between the auxiliary pipe 3 and the clamp is the same as that of the bolt ball joint or welded ball joint in the building grid structure.

[0039] Embodiment Three:

[0040] See Figures 3 to 7 , a prefabricated connection joint for steel pipe structures. The splicing main pipe 1a is provided with a spherical clamp 2a with a drum-shaped cross-section inner hole at the joint. The spherical clamp is composed of two symmetrical fasteners. The fasteners are symmetrically provided with bolt holes through local removal and protrusion. The two fasteners are connected and fixed to the main pipe by tightening bolts. Before tightening the bolts, the fasteners can rotate around the main pipe at any angle. After tightening the bolts, there is a gap between the two fasteners to ensure that the fasteners and the main pipe are fully fixed by tightening the bolts.

[0041] The inner hole of the fastener of the spherical clamp 2a with a drum-shaped cross-section inner hole is a drum-shaped cross-section that is small at both ends and large in the middle. The bolt holes are provided on the spherical surface of the clamp according to the spatial position of the auxiliary pipe 3. The ends of the bolt holes are locally milled flat, and the bolt specifications at the ends of the bolt holes correspond to those of the auxiliary pipe.

[0042] The auxiliary pipe 3 and the splicing main pipe 1a are in the same plane, and the crossing forms are T-shaped, Y-shaped, X-shaped, and K-shaped.

[0043] The auxiliary pipe 3 and the splicing main pipe 1a are in different planes, and the crossing forms are TT-shaped and KK-shaped.

[0044] The connection between the auxiliary pipe 3 and the clamp is the same as that of the bolt ball joint or welded ball joint in the building grid structure.

[0045] The above T-shaped, Y-shaped, X-shaped, TT-shaped, and KK-shaped joints are all divided into two cases: the main pipe is continuous at the connection joint and the main pipe is discontinuous at the connection joint. When the main pipe is continuous at the connection joint, a spherical clamp with a columnar cross-section inner hole is set for the continuous main pipe. When the main pipe is discontinuous at the connection joint, a spherical clamp with a drum-shaped cross-section inner hole is set for the splicing main pipe, and the equal-strength connection of the main pipe can be realized at the clamp.

[0046] Embodiment Four:

[0047] See Figure 8 , a prefabricated connection joint for steel pipe structures. The splicing main pipe 1a is provided with a spherical clamp 2a with a drum-shaped cross-section inner hole at the joint. The clamp is composed of two symmetrical fasteners. The fasteners are symmetrically provided with bolt holes through local removal and protrusion. The two fasteners are connected and fixed to the main pipe by tightening bolts. Before tightening the bolts, the fasteners can rotate around the main pipe at any angle. After tightening the bolts, there is a gap between the two fasteners to ensure that the fasteners and the main pipe are fully fixed by tightening the bolts.

[0048] The inner hole of the fastener of the spherical clamp 2a with a drum-shaped cross-section inner hole is a drum-shaped cross-section that is smaller at both ends and larger in the middle. The bolt holes of the clamp spherical surface are set according to the spatial position of the secondary pipe 3, and the ends of the bolt holes are partially milled flat. The bolt specifications of the bolt holes correspond to those of the end of the secondary pipe.

[0049] According to the spatial position, the secondary pipe 3 can be connected to the bolt holes on the spherical surface of the clamp; the connection between the secondary pipe 3 and the clamp is the same as that of the bolted spherical joints or welded spherical joints in the building space frame structure.

[0050] The horizontal tie rod 5 and the cross bracing 6 are connected to the spherical clamp 2a with a drum-shaped cross-section inner hole by bolts, and the purlin support 7 is connected to the bolt holes on the spherical surface of the clamp.

[0051] It should be noted that, without conflict, the embodiments in this solution and the features in the embodiments can be combined with each other.

[0052] In the description of the present invention, it should be noted that the terms "main pipe" and "secondary pipe" are for the difference in connection methods and do not represent the relative size of the cross-sectional dimensions of the pipe fittings. In the node connection, any pipe fitting can be used as the "main pipe" or "secondary pipe"; the spatial positions of the "horizontal tie rod" and "cross bracing" are not limited to the horizontal direction and can be in any spatial position; the "purlin support" can also be any other connected component and is not limited to a specific functional form; the "secondary pipe" and the "main pipe" can be combined at any angle, and there is no specific limit on the number of secondary pipes.

[0053] The technical features not described in the present invention can be realized by or adopted the prior art, which will not be elaborated here. The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. The changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A prefabricated connection joint for a steel pipe structure, characterized in that, It is divided into two cases: the main pipe is continuous at the connection node and the main pipe is discontinuous at the connection node. When the main pipe is continuous at the connection node, a spherical clamp (2) with a cylindrical cross-sectional inner hole is set on the continuous main pipe (1). When the main pipe is discontinuous at the connection node, a spherical clamp (2a) with a drum-shaped cross-sectional inner hole is set on the spliced main pipe (1a). Bolt holes are set on the spherical surface of the clamp to connect with the secondary pipe (3). The horizontal tie rod (5), cross bracing (6), and purlin support (7) are directly connected to the bolt holes on the spherical surface of the clamp through bolts or connected to the bolts between the fasteners through the bolt holes.

2. The prefabricated connection joint of a steel pipe structure according to claim 1, characterized in that it is columnar The spherical clamp (2) with a cross-sectional inner hole and the spherical clamp (2a) with a drum-shaped cross-sectional inner hole are both two symmetric fasteners. The fasteners are symmetrically provided with bolt holes through local cutting and outward protrusion. The two fasteners are connected and fixed to the main pipe through bolts.

3. The assembled connection joint of a steel pipe structure according to claim 2, characterized in that, Bolt holes are set on the spherical surface of the clamp according to the spatial position of the secondary pipe (3). The ends of the bolt holes are partially milled flat, and the bolt specifications at the ends of the bolt holes correspond to those of the secondary pipe (3).

4. The prefabricated connection node of a steel pipe structure according to claim 1, characterized in that it is columnar The inner diameter of the fastener of the spherical clamp (2) with a cross-sectional inner hole is the same as the outer diameter of the main pipe, and the arc length is less than half of the circumference of the main pipe. The inner hole of the spherical clamp (2a) with a drum-shaped cross-sectional inner hole is small at both ends and large in the middle, and a tapered inner liner (4) is set at the end of the main pipe.

5. The prefabricated connection joint of a steel pipe structure according to claim 4, characterized in that, The tapered inner liner (4) and the spliced main pipe (1a) can be integrally connected by welding or threading. The ends are flush and the outer ring is smooth. The two main pipes are tightly abutted to achieve connection through the spherical clamp with a drum-shaped cross-sectional inner hole.

6. The prefabricated connection node of a steel pipe structure according to claim 1, characterized in that, Textures can be set on the outer walls of the continuous main pipe (1) and the spliced main pipe (1a) and the inner walls of the fasteners. The textures are plane strips or space curves. The secondary pipe (3) is connected to the bolt holes on the spherical surface of the clamp at any angle according to the spatial position. The connection between the secondary pipe (3) and the spherical surface of the clamp is the same as that of the bolted spherical joints or welded spherical joints in the space grid structure. The horizontal tie rod (5), cross bracing (6), and purlin support (7) can be of any cross-sectional shape and spatial position.

7. A prefabricated connection joint of a steel pipe structure according to claim 1, characterized in that, For a T-shaped or Y-shaped joint, a spherical clamp (2a) with a drum-shaped cross-sectional inner hole is set on the spliced main pipe (1a). Bolt holes are set on the clamp to connect with the secondary pipe (3) to form a T-shaped or Y-shaped joint. For an X-shaped joint, a spherical clamp (2a) with a drum-shaped cross-sectional inner hole is set on the spliced main pipe (1a). Bolt holes are set on the clamp to connect with the secondary pipe (3) to form an X-shaped joint. For a K-shaped joint, a spherical clamp (2a) with a drum-shaped cross-sectional inner hole is set on the spliced main pipe (1a). Bolt holes are set on the clamp to connect with the secondary pipe (3) to form a K-shaped joint. For a TT-shaped joint, a spherical clamp (2a) with a drum-shaped cross-sectional inner hole is set on the spliced main pipe (1a). Bolt holes are set on the clamp to connect with the secondary pipe (3) to form a TT-shaped joint. For a KK-shaped joint, a spherical clamp (2a) with a drum-shaped cross-sectional inner hole is set on the spliced main pipe (1a). Bolt holes are set on the clamp to connect with the secondary pipe (3) to form a KK-shaped joint.

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