A spherical steel net rack bolt connection mechanism

Abstract

This utility model relates to a bolt connection mechanism for a spherical steel space frame, belonging to the technical field of spherical steel space frame connections. The bolt connection mechanism includes: a spherical section with multiple bolt members disposed on its outer side; and a connection protection mechanism disposed on the outer side of the spherical section to protect the connection between the spherical section and the multiple bolt members. The connection protection mechanism includes multiple connecting blocks fixedly installed on the outer side of the spherical section. By covering the connection area between the bolt members and the spherical section with the protective component, a stable external protective barrier is formed, effectively preventing rainwater, dust, and salt spray from corroding the threaded area, reducing the risk of corrosion, and extending the service life of the connection components. A sealing component is disposed inside the protective component, creating a sealed space between the protective cover and the spherical section or bolt members, further improving the sealing and protective performance of the joint.

Description

Technical Field

[0001] This utility model relates to the field of spherical steel space frame connection technology, and in particular to a bolt connection mechanism for spherical steel space frames. Background Technology

[0002] A spherical joint space frame structure refers to a space frame structure that uses spheres as nodes and steel pipes as members. A space frame structure is a spatial structure formed by connecting multiple members through nodes in a specific grid pattern. It has advantages such as low spatial stress, light weight, high stiffness, and good seismic performance; it can be used as roofing for buildings such as stadiums, theaters, exhibition halls, waiting halls, stadium grandstand canopies, and aircraft hangars.

[0003] As shown in the reference case "A bolted spherical joint connecting steel space frame structure" (publication number CN214742509U), improvements are made to the traditional spherical joint connecting steel space frame, making the connecting steel space frame more flexible, with stronger connectivity and load-bearing capacity when connected to the sphere. At the same time, wear between the connection part and the connecting sphere is reduced, enhancing the service life and safety of the connection node, and has good practical application and promotion value.

[0004] Most existing spherical steel space frame nodes use bolted connections. Although flexible components are introduced into the connection structure to alleviate stress concentration, improve buffering and load-bearing capacity, and thus extend the service life of the spherical steel space frame, the steel structure is exposed to the outdoor environment for a long time and is susceptible to corrosion from rain, dust, salt spray and other factors. Especially in coastal, high-humidity or industrially polluted areas, bolts and threaded holes are prone to corrosion, which in turn affects the service life of the space frame structure. Utility Model Content

[0005] Therefore, it is necessary to address the issue that the existing spherical steel space frame nodes mostly use bolted connections. Although the flexible structure improves the load-bearing and buffering performance, they are still susceptible to corrosion from rainwater and salt spray during long-term outdoor use, leading to corrosion of bolts and threaded holes, which in turn affects the structural lifespan. Therefore, a bolted connection mechanism for spherical steel space frames should be provided.

[0006] It includes: a spherical joint, on the outside of which a plurality of bolt members are provided; a connecting protection mechanism, which is provided on the outside of the spherical joint for protecting the spherical joint from the plurality of bolt members; wherein the connecting protection mechanism includes a plurality of connecting blocks fixedly installed on the outside of the spherical joint, each of the plurality of connecting blocks having a protective component on its outside, and the protective component having a sealing component inside.

[0007] The protective assembly includes threaded holes fixedly installed on the surfaces of multiple connecting blocks. Multiple bolt members are located on one side of the multiple connecting blocks respectively. A first protective cover and a second protective cover are provided on one side of each connecting block. One end of each bolt member is threadedly connected to the threaded hole of an adjacent connecting block. Both the first protective cover and the second protective cover are located on the outside of the bolt member.

[0008] Two locking blocks are fixedly installed on the side of the first protective cover near the second protective cover, and two locking slots are opened on the side of the second protective cover near the first protective cover. The two locking blocks and the two locking slots are sealed and locked together.

[0009] The connecting block has a guide groove on the side near the bolt member. The guide groove is funnel-shaped and is connected to the threaded hole.

[0010] Sealing blocks are fixedly installed on the outer sides of both the first and second protective covers. Both sealing blocks are arranged in a semi-circular shape, and one side of each sealing block is pressed against the surface of the spherical joint. The two sealing blocks cover the connection between the first protective cover, the second protective cover and the connecting block.

[0011] The first and second protective covers are each fixedly installed with a mounting block on one side. The two mounting blocks are combined into a ring shape. A connecting groove is opened on one side of the connecting block. One side of each of the two mounting blocks extends into the interior of the connecting groove, and both mounting blocks are threadedly connected to the inner wall of the connecting groove.

[0012] The sealing assembly includes a sealing ring disposed inside the first protective cover and the second protective cover. The sealing ring is sleeved on the outside of the adjacent bolt members, and one side of the sealing ring is sealed and tightly abutted against the inner wall of the first protective cover and the second protective cover.

[0013] A spring is fixedly installed on one side of the sealing ring, and the other end of the spring abuts against the inner wall of the first and second protective covers. Beneficial effects

[0014] 1. By encasing the connection between the bolt shank and the ball joint with a protective component, a stable external protective barrier is formed, effectively preventing rainwater, dust, and salt spray from corroding the threaded area, reducing the risk of corrosion, and extending the service life of the connected components. A sealing component is located inside the protective component, creating a sealed space between the protective cover and the ball joint or bolt shank, further enhancing the sealing and protective performance of the joint.

[0015] 2. The sealing ring achieves full circumferential sealing coverage of the outer side of the bolt member. The sealing ring is sleeved on the outer surface of the adjacent bolt member and is sealed tightly against the inner walls of the first and second protective covers. It can form a closed and airtight space between the protective cover and the bolt, thereby effectively preventing the infiltration of external substances such as rainwater, moisture, and dust. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection and protection mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the connecting block and protective component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the connecting block of this utility model;

[0021] Figure 5 This is a schematic diagram of the first protective cover and sealing ring structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the second protective cover structure of this utility model.

[0023] Figure label:

[0024] 100. Spherical joint; 200. Bolt rod; 300. Connecting and protective mechanism; 310. Connecting block; 320. Protective component; 321. Threaded hole; 322. First protective cover; 323. Second protective cover; 324. Guide groove; 325. Sealing block; 326. Mounting block; 327. Connecting groove; 328. Locking block; 329. Locking groove; 330. Sealing component; 331. Sealing ring; 332. Spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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 utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The following is combined Figures 1-6 This invention describes the spherical steel space frame bolt connection mechanism.

[0027] In one embodiment, a spherical steel space frame bolt connection mechanism includes: a spherical section 100, with a plurality of bolt members 200 disposed on the outer side of the spherical section 100; and a connection protection mechanism 300 disposed on the outer side of the spherical section 100 for protecting the spherical section 100 from the plurality of bolt members 200; wherein the connection protection mechanism 300 includes a plurality of connecting blocks 310 fixedly installed on the outer side of the spherical section 100, and a protection component 320 is disposed on the outer side of each of the plurality of connecting blocks 310, and a sealing component 330 is disposed inside the protection component 320.

[0028] In this embodiment, the protective component 320 covers the connection position between the bolt member 200 and the ball joint 100, forming a stable external protective barrier to prevent environmental factors such as rainwater, dust, and salt spray from directly corroding the threaded connection, significantly reducing the risk of corrosion and extending the service life. The sealing component 330 is disposed inside the protective component 320, which can form a sealed space between the protective shell and the ball joint 100 or the bolt mating surface, effectively blocking the infiltration of external air and moisture and improving the overall protective sealing performance.

[0029] It should be noted that the existing spherical steel space frame connection mechanism typically includes three core components: spherical joint 100, connecting bolts, and steel pipe members;

[0030] The spherical joint 100 serves as the central structural component, and its surface is provided with multiple threaded holes 321 for threaded connection with rods in various directions via bolts, thereby forming a stable spatial structure.

[0031] Bolts are usually located at the end of the steel pipe. Force is transmitted and positioned by screwing them into the ball joint 100 through threads. The entire connection process relies on precise alignment and reliable thread fit.

[0032] Both the protective component 320 and the sealing component 330 are located in the external area of ​​the connection structure. Their structural design does not change the original connection method between the spherical joint 100 and the bolt member 200, nor does it interfere with the threaded connection path. The protective component 320 is used to cover the exposed connection part between the spherical joint 100 and the bolt member 200, and does not contact the internal threaded connection area. The sealing component 330 is set inside the protective component 320 and is used to form a sealed space between the protective shell and the spherical joint 100 or the bolt member 200, which plays a role in preventing moisture and dust from entering. Neither of them participates in the stress and positioning process of the main structure and will not have any adverse effect on the assembly accuracy or structural stability of the spherical steel grid connection mechanism.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the protective component 320 includes threaded holes 321 fixedly installed on the surface of multiple connecting blocks 310, multiple bolt members 200 are respectively located on one side of multiple connecting blocks 310, a first protective cover 322 and a second protective cover 323 are provided on one side of the connecting block 310, one end of the bolt member 200 is threadedly connected to the threaded hole 321 of the adjacent connecting block 310, and the first protective cover 322 and the second protective cover 323 are both located on the outside of the bolt member 200.

[0034] In this embodiment, the first protective cover 322 and the second protective cover 323 adopt a splicing structure, which forms a frustum shape after combination. It can simultaneously cover the exposed parts of the connecting block 310 and the bolt rod 200, effectively improving the overall protection performance of the node. The frustum structure not only fits the outline, reduces the external joint area, and reduces the possibility of rainwater, dust and other foreign objects seeping in, but also has a good guiding effect to prevent water vapor from stagnating in the connection area.

[0035] It should be noted that the first protective cover 322 and the second protective cover 323 are made of materials with excellent corrosion resistance and weather resistance to ensure long-term stable use in complex outdoor environments. Preferred materials include, but are not limited to, high-molecular engineering plastics such as polycarbonate, polyurethane, and polypropylene. These materials have good waterproof, dustproof, and UV resistance capabilities, effectively resisting the erosion of external factors such as rain, dust, and salt spray. To enhance structural rigidity and impact resistance, the outer surface of the protective cover can be reinforced with glass fiber or treated with a surface-hardening coating, such as spraying an anti-corrosion coating or covering it with an aging-resistant protective film, depending on actual usage requirements. In high-intensity protection or highly corrosive environments, aluminum alloy or stainless steel materials can also be used to make the protective cover shell, constructing a frustum shell structure through precision stamping or welding, providing superior pressure resistance and durability, suitable for high-risk engineering scenarios such as heavy industry or coastal areas.

[0036] Two locking blocks 328 are fixedly installed on the side of the first protective cover 322 near the second protective cover 323. Two slots 329 are opened on the side of the second protective cover 323 near the first protective cover 322. The two locking blocks 328 and the two slots 329 are sealed and locked together.

[0037] In this embodiment, the first protective cover 322 and the second protective cover 323 are quickly spliced ​​and stably fixed through the sealing and snapping method between the snap block 328 and the snap groove 329, which facilitates quick on-site installation and disassembly, and allows for quick replacement of broken parts when damaged or broken.

[0038] The connecting block 310 has a guide groove 324 on the side near the bolt member 200. The guide groove 324 is funnel-shaped and is connected to the threaded hole 321.

[0039] In this embodiment, the funnel-shaped guide groove 324 can play a guiding and positioning role during the insertion of the bolt member 200. Through the tapered structure design of the guide groove 324, the bolt member 200 can be quickly aligned with the threaded hole 321 during on-site installation, avoiding tilting during manual insertion and significantly improving assembly efficiency and hole alignment accuracy.

[0040] Sealing blocks 325 are fixedly installed on the outer sides of the first protective cover 322 and the second protective cover 323. Both sealing blocks 325 are arranged in a semi-circular shape. One side of each sealing block 325 is pressed against the surface of the spherical joint 100, and the two sealing blocks 325 cover the connection between the first protective cover 322, the second protective cover 323 and the connecting block 310.

[0041] In this embodiment, after assembly, the two sealing blocks 325 can form an annular closed structure around the spherical joint 100, effectively sealing the splicing gap between the first protective cover 322, the second protective cover 323 and the connecting block 310. Through the contact between the sealing block 325 and the surface of the spherical joint 100, water vapor, dust or corrosive gas can be further blocked from seeping in from the connection gap, effectively improving the sealing performance and protective integrity of the entire protective structure.

[0042] Mounting blocks 326 are fixedly installed on one side of the first protective cover 322 and the second protective cover 323. The two mounting blocks 326 are combined into a ring shape. A connecting groove 327 is opened on one side of the connecting block 310. One side of the two mounting blocks 326 extends into the interior of the connecting groove 327, and the two mounting blocks 326 are threadedly connected to the inner wall of the connecting groove 327.

[0043] In this embodiment, the two mounting blocks 326 form a complete annular structure after assembly, and are inserted into the connecting groove 327 provided on one side of the connecting block 310 to achieve a stable structural connection. By providing a threaded engagement structure on the inner wall of the connecting groove 327, a reliable threaded lock can be achieved between the two mounting blocks 326 and the connecting block 310, ensuring that the protective cover assembly does not loosen or fall off during long-term use. This facilitates the disassembly and assembly of the first protective cover 322 and the second protective cover 323 during later maintenance, and provides good on-site construction convenience.

[0044] like Figure 2 and Figure 5 As shown, the sealing assembly 330 includes a sealing ring 331 disposed inside the first protective cover 322 and the second protective cover 323. The sealing ring 331 is sleeved on the outside of the adjacent bolt member 200, and one side of the sealing ring 331 is sealed and pressed against the inner wall of the first protective cover 322 and the second protective cover 323.

[0045] In this embodiment, the sealing ring 331 achieves full circumferential sealing coverage of the outer side of the bolt member 200. The sealing ring 331 is sleeved on the outer surface of the adjacent bolt member 200 and is sealed and pressed against the inner walls of the first protective cover 322 and the second protective cover 323, which can form a closed and airtight space between the protective cover and the bolt, thereby effectively preventing the infiltration of external substances such as rainwater, moisture, and dust.

[0046] A spring 332 is fixedly installed on one side of the sealing ring 331, and the other end of the spring 332 abuts against the inner wall of the first protective cover 322 and the second protective cover 323.

[0047] In this embodiment, the elastic force of the spring 332 can keep the sealing ring 331 in a pre-tightened state of outward expansion, thereby enhancing the sealing fit between it and the outer wall of the bolt member 200 and the inner wall of the protective cover, and effectively improving the sealing reliability.

[0048] Working Principle: During use, multiple bolt members 200 are screwed into multiple threaded holes 321 on the outer surface of the spherical joint 100, achieving a rigid connection with the steel pipe member and forming a basic spatial support structure. To improve the sealing and protection performance of the joint connection area in outdoor environments, a connecting protection mechanism 300 is set on the outside of the spherical joint 100. Multiple connecting blocks 310 are installed on the surface of the spherical joint 100 as transition support components, adjacent to the bolt members 200, and guided by funnel-shaped guide grooves 324 to quickly position and align the bolt members 200 with the threaded holes 321, improving installation accuracy and efficiency. The protective component 320 consists of a first protective cover 322 and a second protective cover 323, which are spliced ​​together to form a frustum structure, covering the outside of the connecting blocks 310 and bolt members 200. The two protective covers are sealed and snapped together by a locking block 328 and a locking groove 329, forming a complete cover. One side of the cover is inserted into the connecting groove 327 of the connecting block 310 by an installation block 326 and fixed by a threaded connection to ensure a stable and reliable structure. Two semi-circular annular sealing blocks 325 are fixed to the outside of the protective cover, fitting against the surface of the spherical section 100 to seal the gap at the connection between the cover and the sphere, forming an annular protective sealing band. A sealing component 330 is set inside the protective component 320. The sealing ring 331 is sleeved on the outer circumference of the bolt member 200 and pressed against the inner wall of the protective cover. A continuous elastic preload is provided by the spring 332 to ensure that the sealing ring 331 remains in close contact with the interface position in a dynamic state, forming a multi-layer sealing barrier that effectively prevents rainwater, dust, and salt spray from entering the connection part, thereby enhancing the corrosion resistance and structural safety of the connection node and improving the long-term operational reliability of the overall modern space frame structure in complex environments.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bolt connection mechanism for a spherical steel space frame, characterized in that, include: A spherical joint (100) is provided with a plurality of bolt members (200) on its outer side. A connecting protection mechanism (300) for protecting the ball joint (100) from the plurality of bolt members (200) is provided on the outside of the ball joint (100); The connection protection mechanism (300) includes multiple connecting blocks (310) fixedly installed on the outside of the spherical joint (100), and a protective component (320) is provided on the outside of each of the multiple connecting blocks (310), and a sealing component (330) is provided inside the protective component (320).

2. The spherical steel space frame bolt connection mechanism according to claim 1, characterized in that, The protective component (320) includes threaded holes (321) fixedly installed on the surface of multiple connecting blocks (310). Multiple bolt members (200) are respectively located on one side of multiple connecting blocks (310). A first protective cover (322) and a second protective cover (323) are provided on one side of each connecting block (310). One end of each bolt member (200) is threadedly connected to the threaded hole (321) of an adjacent connecting block (310). The first protective cover (322) and the second protective cover (323) are both located on the outside of the bolt member (200).

3. The spherical steel space frame bolt connection mechanism according to claim 2, characterized in that, Two locking blocks (328) are fixedly installed on the side of the first protective cover (322) near the second protective cover (323). Two slots (329) are opened on the side of the second protective cover (323) near the first protective cover (322). The two locking blocks (328) and the two slots (329) are sealed and locked together.

4. The spherical steel space frame bolt connection mechanism according to claim 2, characterized in that, The connecting block (310) has a guide groove (324) on the side near the bolt member (200). The guide groove (324) is funnel-shaped and is connected to the threaded hole (321).

5. The spherical steel space frame bolt connection mechanism according to claim 4, characterized in that, A sealing block (325) is fixedly installed on the outer side of the first protective cover (322) and the second protective cover (323). The two sealing blocks (325) are arranged in a semi-circular shape. One side of the two sealing blocks (325) is pressed against the surface of the spherical joint (100), and the two sealing blocks (325) cover the connection between the first protective cover (322), the second protective cover (323) and the connecting block (310).

6. The spherical steel space frame bolt connection mechanism according to claim 4, characterized in that, The first protective cover (322) and the second protective cover (323) are each fixedly installed with a mounting block (326) on one side. The two mounting blocks (326) are combined into a ring shape. A connecting groove (327) is opened on one side of the connecting block (310). One side of the two mounting blocks (326) extends into the interior of the connecting groove (327), and the two mounting blocks (326) are threadedly connected to the inner wall of the connecting groove (327).

7. The spherical steel space frame bolt connection mechanism according to claim 5, characterized in that, The sealing assembly (330) includes a sealing ring (331) disposed inside the first protective cover (322) and the second protective cover (323). The sealing ring (331) is sleeved on the outside of the adjacent bolt member (200), and one side of the sealing ring (331) is sealed and abutted against the inner wall of the first protective cover (322) and the second protective cover (323).

8. The spherical steel space frame bolt connection mechanism according to claim 7, characterized in that, A spring (332) is fixedly installed on one side of the sealing ring (331), and the other end of the spring (332) abuts against the inner wall of the first protective cover (322) and the second protective cover (323).

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