Fabricated hollow sphere joint and mounting method

Abstract

The invention discloses a fabricated hollow sphere joint and a mounting method, and belongs to the technical field of steel structures and space structures. The assembly type hollow sphere joint comprises a hollow sphere, and a plurality of first conical heads are arranged on the periphery of the hollow sphere; the large end face of each first conical head is fixedly connected with the hollow ball, a first high-strength bolt is arranged in each first conical head, the nut end of each first high-strength bolt is located in the corresponding first conical head, the screw rod end of each first high-strength bolt penetrates out of the small end face of the corresponding first conical head, and the screw rod end, located outside the corresponding first conical head, of each first high-strength bolt is further connected with a second conical head. Threads are arranged in the second conical head, a screw of the first high-strength bolt penetrates into the second conical head from the small end face of the second conical head and is in threaded connection with the second conical head, and the large end face of the second conical head is fixedly connected with the first rod piece. The invention further discloses an installation method of the assembly type hollow sphere joint, the assembly type hollow sphere joint is high in assembly degree and small in steel consumption, and the defects of two existing joints are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure and space structure, and particularly relates to an assembled hollow spherical joint and a mounting method. BACKGROUND

[0002] The net rack structure is usually applicable to buildings with unique shapes and large spans, such as gymnasiums, exhibition halls, railway stations, theatres and other large public buildings, and industrial buildings such as aircraft maintenance hangars, water plants and large-span industrial plants. The node types of the space net rack structure mainly include a bolt spherical joint and a welded hollow spherical joint.

[0003] The bolt spherical joint is convenient and fast to install, and is beneficial to shorten the construction period and improve the construction efficiency, but the bolt spherical joint is a solid ball, and the single weight is large and the steel consumption is large. The welded hollow spherical joint is a hollow ball, and the single weight is small under the similar outer diameter, but the spherical diameter is large due to the multi-directional member convergence, and the on-site welding of the member and the joint is not beneficial to guarantee the construction quality and the construction period is long. Therefore, the present application provides an assembled hollow spherical joint and a mounting method. SUMMARY

[0004] The present application aims to overcome the problems in the prior art, and provides an assembled hollow spherical joint and a mounting method, which have high assembly degree and small steel consumption, and make up for the deficiencies of the two existing joints.

[0005] The present application provides an assembled hollow spherical joint, which comprises a hollow sphere, and a plurality of first taper heads are arranged on the outer periphery of the hollow sphere; the large end surface of each first taper head is fixedly connected with the hollow sphere, a first high-strength bolt is arranged in each first taper head, the nut end of the first high-strength bolt is located in the first taper head, the screw rod end of the first high-strength bolt is arranged to pass out of the small end surface of the first taper head, the screw rod end of the first high-strength bolt located outside the first taper head is further connected with a second taper head, a thread is arranged in the second taper head, the screw rod of the first high-strength bolt passes into the second taper head from the small end surface of the second taper head and is threadedly connected with the second taper head, and the large end surface of the second taper head is fixedly connected with a first member.

[0006] Preferably, a first sleeve is further sleeved on the screw rod of the first high-strength bolt between the first taper head and the second taper head, and a first fastening pin is arranged on the first sleeve.

[0007] Preferably, a plurality of sealing plate assemblies are further arranged on the hollow sphere, each sealing plate assembly comprises a connecting cylinder, a second sleeve and a sealing plate which are sequentially arranged, the connecting cylinder is fixedly arranged on the outer surface of the hollow sphere, a second high-strength bolt is arranged in the connecting cylinder, the nut end of the second high-strength bolt is located in the connecting cylinder, the screw rod end of the second high-strength bolt is threadedly connected with the sealing plate after passing out of the connecting cylinder and the second sleeve, and a second fastening pin is arranged on the second sleeve. The sealing plate is fixedly connected with a second member.

[0008] Preferably, the central axes of the first cone, the second cone, and the sealing plate assembly all point towards the center of the hollow sphere.

[0009] Preferably, the length of the threaded section on the second cone is greater than 1.1 times the diameter of the first high-strength bolt.

[0010] Preferably, the length of the threaded section on the sealing plate is greater than 1.1 times the diameter of the second high-strength bolt.

[0011] Preferably, the hollow sphere is made by welding two hollow hemispheres together.

[0012] The present invention also provides an installation method for the above-mentioned assembled hollow spherical node, the specific installation method of which is as follows:

[0013] A circular steel plate is processed into a hollow hemispherical shell, with beveled edges. Two hemispherical shells are then joined together and welded to obtain a hollow sphere.

[0014] The edge of the first cone is beveled, the first high-strength bolt is placed in the first cone, and then welded to the surface of the hollow sphere. The central axis of the first cone points to the center of the hollow sphere.

[0015] A second cone with internal threads is machined, and its edges are beveled. Then, the second cone is joined and welded to the first rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the prefabricated hollow sphere node of the present invention, by directly welding the cone head onto the hollow sphere, can alleviate stress concentration and improve fatigue performance; the present invention, by using the cone head or end plate to connect the hollow sphere, can greatly reduce the outer diameter of the hollow sphere, thereby reducing the amount of steel used; the present invention, while achieving high rigidity and good alignment of the welded hollow sphere node, greatly improves the prefabrication degree of the space frame structure by using bolted connections; all components of the present invention are manufactured in the factory and assembled on site, which helps to improve welding quality and reduce construction period. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembled hollow sphere node according to Embodiment 1 of the present invention;

[0018] Figure 2 This is a schematic diagram of the assembled hollow spherical node in Embodiment 2 of the present invention. Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the assembled hollow spherical node in Embodiment 2 of the present invention. Figure 2 ;

[0020] Figure 4 This is a three-dimensional schematic diagram of the assembled assembly in Embodiment 2 of the present invention;

[0021] Figure 5 This is a schematic diagram of the second cone head in Embodiment 1 of the present invention;

[0022] Figure 6 This is a schematic diagram of the sealing plate in Embodiment 2 of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Hollow sphere, 2. First cone, 3. First high-strength bolt, 4. Second cone, 5. First rod, 6. First sleeve, 7. First fastening pin, 8. Sealing plate assembly, 81. Connecting cylinder, 82. Second sleeve, 83. Sealing plate, 9. Second high-strength bolt, 10. Second rod. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” indicate that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0027] Currently, there are two main types of nodes for space frame structures: bolted ball nodes and welded hollow ball nodes. Bolted ball nodes use solid spheres, resulting in a larger weight and higher steel consumption. Welded hollow ball nodes, as the name suggests, use hollow spheres, resulting in a smaller weight for similar outer diameters, but a larger diameter and requiring more on-site welding, which is detrimental to ensuring construction quality and extends the construction period. To achieve a better construction environment and economic benefits, a node type with a high degree of prefabrication and lower steel consumption is needed to overcome the shortcomings of the existing two node types.

[0028] This embodiment uses prefabricated hollow sphere joints, which, compared to currently used bolted sphere joints, have lower weight, require less steel, are easier to construct, and reduce costs. Compared to currently used welded hollow sphere joints, because the cone head is pre-welded to the outer surface of the hollow sphere in the factory, all on-site connections are bolted. This not only alleviates stress concentration at the connection between the cone head and the hollow sphere, increases rigidity, reduces the diameter of the hollow sphere and the amount of steel used, but also achieves full prefabrication of bolted connections, simplifying construction and reducing costs.

[0029] The following is an example, with reference to the accompanying drawings, to illustrate the design requirements of the assembled hollow spherical node in this embodiment.

[0030] See Figure 1 This embodiment describes a prefabricated hollow sphere node, belonging to the field of steel structures and spatial structures. It includes a hollow sphere 1, which is formed by welding two hollow hemispheres. The outer periphery of the hollow sphere 1 is provided with multiple first cones 2. The large end face of each first cone 2 is fixedly connected to the hollow sphere 1. In this embodiment, the fixing method is welding. Welding the cones directly to the hollow sphere in this prefabricated hollow sphere node can alleviate stress concentration and improve fatigue performance. Because the hollow sphere is connected by cones or end plates, the outer diameter of the hollow sphere is greatly reduced, thereby reducing steel consumption. Each first cone 2 is provided with a first high-strength bolt 3. The nut end of the first high-strength bolt 3 is located inside the first cone 2, and the screw end of the first high-strength bolt 3 protrudes from the small end face of the first cone 2. The screw end of the first high-strength bolt 3 is also connected to a second cone 4. (Refer to...) Figure 5 The second cone head 4 has a threaded hole section 11 inside. The screw of the first high-strength bolt 3 is threadedly connected to the second cone head 4. The large end face of the second cone head 4 is fixedly connected to the first rod 5. In this embodiment, the fixing method is welding. It should be noted that all welding operations in this embodiment are completed during the factory prefabrication process. During on-site assembly, only bolt connections are needed to connect the various components. This invention provides high rigidity and good centering of the welded hollow sphere nodes, while the use of bolt connections greatly improves the prefabrication degree of the space frame structure.

[0031] As an example, the hollow sphere 1 in this embodiment is made by rolling and welding two circular steel plates. Of course, it can also be formed as a single piece by casting.

[0032] In this embodiment, the first cone 2 and the second cone 4 are designed according to the stress requirements and are welded to the spherical surface. The weld type is either a fillet weld or a bevel weld. As a more preferred method, the central axes of the first cone 2 and the second cone 4 both point to the center of the hollow sphere 1, resulting in good alignment of the node and high overall node connection strength.

[0033] In this embodiment, the first cone 2 and the second cone 4 are implemented according to the specifications of the current standard "Steel Space Frame Bolted Ball Joint" JGT10-2009; as a more preferred method, the second cone 4 is provided with a threaded hole section 11 inside, and the length of the threaded hole section 11 inside the second cone 4 is greater than 1.1 times the diameter of the first high-strength bolt 3, in order to improve the connection reliability while meeting the connection strength requirements.

[0034] As a preferred embodiment, the screw of the first high-strength bolt 3 between the first cone 2 and the second cone 4 is also fitted with a first sleeve 6, and the first sleeve 6 is provided with a first fastening pin 7. The purpose is to drive the first fastening pin 7 through the first sleeve 6 to screw the first high-strength bolt 3 into the second cone 4 which has internal threads until it is tightened.

[0035] Reference Figure 2 , Figure 3 as well as Figure 4 As another embodiment, and as an example, based on the above embodiments, the hollow sphere 1 of this embodiment is further provided with multiple sealing plate assemblies 8. Preferably, the central axis of each sealing plate assembly 8 points towards the center of the hollow sphere 1, aiming to improve the alignment of the hollow sphere connection nodes and enhance the overall structural connection strength. Each sealing plate assembly 8 includes a connecting cylinder 81, a second sleeve 82, and a sealing plate 83 arranged sequentially. A second high-strength bolt 9 is provided inside the connecting cylinder 81, with the nut end of the second high-strength bolt 9 located inside the connecting cylinder 81. (Refer to...) Figure 6 The sealing plate 83 has a threaded hole section 12 inside. The length of the threaded hole section 12 is greater than 1.1 times the diameter of the second high-strength bolt 9, which aims to improve the connection reliability while meeting the connection strength requirements. The screw end of the second high-strength bolt 9 passes through the connecting sleeve 81 and the second sleeve 82 and is threadedly connected to the sealing plate 83. A second fastening pin is provided on the second sleeve 82, which drives the second fastening pin to screw the second high-strength bolt 9 into the internally threaded sealing plate 83 until it is tightened. The sealing plate 83 is also fixedly connected to the second rod 10. In this embodiment, the fixed connection is achieved by welding. Similarly, all welding operations in this embodiment are completed during the factory prefabrication process. During on-site assembly, only bolt connections are needed to connect the various components. This invention achieves high rigidity and good centering of the welded hollow sphere nodes, while the use of bolt connections greatly improves the prefabrication degree of the space frame structure.

[0036] In this embodiment, the design concept of the sealing plate assembly 8 is similar to that of the node in the above embodiments. The difference is that this embodiment uses a sealing plate connection method. In this embodiment, the sealing plate 83 of the sealing plate assembly 8 is manufactured according to the specifications of the current standard "Steel Space Frame Bolted Ball Joint" JGT10-2009. Then, the sealing plate 83 is welded to the short steel pipe to be connected. As another preferred method, the cast steel sealing plate assembly 8 can be directly manufactured, so that the connecting cylinder 81, the second sleeve 82 and the sealing plate 83 are integrally formed. After the second high-strength bolt 9 is inserted into the connecting cylinder 81 and the bolt is connected to the sealing plate 83, the connecting cylinder 81 is welded to the surface of the hollow ball 1. Finally, the sealing plate 83 is threaded or welded to the short steel pipe to be connected.

[0037] Based on the two embodiments described above—one using a single conical head connection and the other using a combination of a conical head and a sealing plate—a conical head connection is used when the diameter of the connected rod is large, and a sealing plate connection is used when the diameter is small. Figure 2 As shown, the diameter of the second member 10 is smaller than that of the second member 10. For example, the second member 10 connected to the sealing plate assembly 8 can be a web member, and the member connected to the second cone 4 can be a chord member. This embodiment can reasonably select different connection forms according to the different forces on the members, so that the hollow sphere 1 can provide sufficient strength and stiffness while reducing the diameter of the sphere.

[0038] At least one embodiment of this disclosure also provides an installation method for the assembled hollow sphere node corresponding to the different connection methods described above;

[0039] This embodiment discloses an installation method for a prefabricated hollow spherical node, which corresponds to the node structure connected by a conical connecting assembly in this embodiment. The method specifically includes the following steps:

[0040] A circular steel plate is processed into a hollow hemispherical shell, and the edges of the shell are beveled. Two hemispherical shells are joined together and welded to obtain a hollow sphere 1.

[0041] The edge of the first cone 2 is beveled, the first high-strength bolt 3 is placed in the first cone 2, and then welded to the surface of the hollow sphere 1. The central axis of the first cone 2 points to the center of the hollow sphere 1.

[0042] The second cone 4 with internal threads is machined and the edge is beveled. Then the second cone 4 is joined and welded to the first rod 5.

[0043] Select the appropriate first sleeve 6 and first fastening pin 7, and fit the first high-strength bolt 3 onto it. The first sleeve 6 drives the first fastening pin 7 to screw the first high-strength bolt 3 into the second conical head 4 with internal threads until it is tightened.

[0044] refer to Figure 2The installation method of the prefabricated hollow spherical node in this embodiment adopts the method of connecting the cone head assembly and the sealing plate assembly, and includes the following steps:

[0045] A circular steel plate is processed into a hollow hemispherical shell, and the edges of the shell are beveled. Two hemispherical shells are joined together and welded to obtain a hollow sphere 1.

[0046] The first cone head 2 has a beveled edge. The first high-strength bolt 3 is placed in the first cone head 2 and then welded to the surface of the hollow sphere 1. The central axis of the first cone head 2 points to the center of the hollow sphere 1. The second cone head 4, which has internal threads and a beveled edge, is then joined and welded to the chord. A suitable first sleeve 6 and a first fastening pin 7 are selected and fitted onto the first high-strength bolt 3. The first sleeve 6 drives the first fastening pin 7 to screw the first high-strength bolt 3 into the second cone head 4 with internal threads until it is tightened.

[0047] The edge of the sealing plate 83 is beveled. The second high-strength bolt 9 is placed in the connecting sleeve 81 and then welded to the surface of the hollow sphere 1. The central axis of the connecting sleeve 81, the second sleeve 82, and the sealing plate 83 points to the center of the hollow sphere 1. The sealing plate 83, which has internal threads, has a beveled edge. The sealing plate 83 is then joined and welded to the web member. A suitable second sleeve 82 and a second fastening pin are selected and fitted with the second high-strength bolt 9. The second sleeve 82 drives the second fastening pin to screw the second high-strength bolt 9 into the internally threaded sealing plate 83 until it is tightened.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated hollow spherical node, characterized in that, The device includes a hollow sphere (1), and the outer periphery of the hollow sphere (1) is provided with a plurality of first cones (2); the large end face of each first cone (2) is fixedly connected to the hollow sphere (1), and each first cone (2) is provided with a first high-strength bolt (3). The nut end of the first high-strength bolt (3) is located inside the first cone (2), and the screw end of the first high-strength bolt (3) passes through the small end face of the first cone (2). The screw end of the first high-strength bolt (3) located outside the first cone (2) is also connected to a second cone (4). The second cone (4) is provided with a thread. The screw of the first high-strength bolt (3) passes through the small end face of the second cone (4) and is threadedly connected to the second cone (4). The large end face of the second cone (4) is fixedly connected to a first rod (5).

2. The assembled hollow spherical node as described in claim 1, characterized in that, A first sleeve (6) is also fitted on the screw of the first high-strength bolt (3) between the first cone (2) and the second cone (4), and a first fastening pin (7) is provided on the first sleeve (6).

3. The assembled hollow spherical node as described in claim 2, characterized in that, The hollow sphere (1) is also provided with a plurality of sealing plate assemblies (8). Each sealing plate assembly (8) includes a connecting cylinder (81), a second sleeve (82) and a sealing plate (83) arranged in sequence. The connecting cylinder (81) is fixed on the outer surface of the hollow sphere (1). A second high-strength bolt (9) is provided inside the connecting cylinder (81). The nut end of the second high-strength bolt (9) is located inside the connecting cylinder (81). The screw end of the second high-strength bolt (9) passes through the connecting cylinder (81) and the second sleeve (82) and is threadedly connected to the sealing plate (83). A second fastening pin is provided on the second sleeve (82). The sealing plate (83) is fixedly connected to the second rod (10).

4. The assembled hollow spherical node as described in claim 3, characterized in that, The central axes of the first cone (2), the second cone (4) and the sealing plate assembly (8) all point to the center of the hollow sphere (1).

5. The assembled hollow spherical node as described in claim 1, characterized in that, The length of the threaded section on the second cone (4) is greater than 1.1 times the diameter of the first high-strength bolt (3).

6. The assembled hollow spherical node as described in claim 3, characterized in that, The length of the threaded section on the sealing plate (83) is greater than 1.1 times the diameter of the second high-strength bolt (9).

7. The assembled hollow spherical node as described in claim 1, characterized in that, The hollow sphere (1) is formed by welding two hollow hemispheres together.

8. The installation method of the prefabricated hollow spherical node as described in claim 1, characterized in that, The installation method is as follows: A circular steel plate is processed into a hollow hemispherical shell with beveled edges. Two hemispherical shells are joined together and welded to obtain a hollow sphere (1). The edge of the first cone (2) is beveled, the first high-strength bolt (3) is placed in the first cone (2), and then the first cone (2) is welded to the surface of the hollow sphere (1). The central axis of the first cone (2) points to the center of the hollow sphere (1). The second cone (4) with internal threads is machined and the edge is beveled. Then the second cone (4) is joined and welded to the first rod (5).

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