Moisture-proof and corrosion-proof space tube truss connecting joint, connecting unit and application method

Abstract

The present application relates to the technical field of space pipe truss, in particular to a moisture-proof and corrosion-proof space pipe truss connecting node and application method, which comprises a truss chord, a hollow threaded hole ball, a double-section bolt and a truss web member, the truss chord is fixedly connected with the hollow threaded hole ball through a stiffening rib, a plurality of first threaded holes for the double-section bolt to pass through are arranged on the hollow threaded hole ball, one end of the double-section bolt is connected with the truss web member, the other end of the double-section bolt is screwed into the first threaded hole and extends into the hollow threaded hole ball, the end of the double-section bolt in the hollow threaded hole ball is threadedly connected with the truss chord through a second threaded hole, the second threaded hole is arranged on the truss chord, the double-section bolt fastens the truss web member and the hollow threaded hole ball through double nuts, and a protective shell is arranged on the double-section bolt. The present application provides a hollow threaded hole ball space pipe truss connecting node, which can greatly reduce the maintenance cost of moisture-proof and corrosion-proof in the later period and ensure the long-term stability and safety of the space large-span pipe truss node.

Description

Technical Field

[0001] This invention relates to the field of spatial tubular trusses for buildings, specifically to moisture-proof and corrosion-resistant spatial tubular truss connection nodes, connection units, and application methods. Background Technology

[0002] With the rapid development of the construction industry, large-span and large-space buildings have emerged. Spatial truss structures can span huge spatial spans with relatively small self-weight. Their system is lightweight, has reasonable stress distribution, high rigidity, and beautiful appearance, ensuring the transparency and visual openness of the building.

[0003] The existing space truss uses welded connections between the web members and chord members, resulting in a large exposed area at the truss nodes, making corrosion and moisture protection difficult and requiring high-altitude operations for later maintenance. Compared to the high costs of repairing or replacing after corrosion, the initial investment in corrosion and moisture protection is relatively low, and it can reduce the frequency of maintenance and repair work caused by corrosion.

[0004] It is worth noting that corrosive and humid environments significantly reduce the service life of truss joints, limiting the use of tubular trusses in marine, chemical, and other similar environments. In critical infrastructure projects such as bridges, buildings, and large industrial facilities, the integrity of truss joints is crucial to the safety of the overall structure. Corrosion and moisture protection can reduce safety hazards caused by corrosion, ensuring the safety of personnel and property. Summary of the Invention

[0005] To address the problems existing in the background technology, this invention proposes a moisture-proof and corrosion-resistant space truss connection node, connection unit, and application method, which will significantly reduce the later moisture-proof and corrosion-resistant maintenance costs and ensure the long-term stability and safety of the space large-span truss node.

[0006] To achieve the above objectives, the present invention adopts the following solution:

[0007] A moisture-proof and corrosion-resistant space truss connection node includes a truss chord, a hollow threaded ball, a double-section bolt, and a truss web member. The truss chord is passed through and fixedly connected to the hollow threaded ball through stiffening ribs. The hollow threaded ball has multiple first threaded holes for the double-section bolts to pass through. One end of the double-section bolt is connected to the truss web member, and the other end of the double-section bolt is screwed into the first threaded hole and extends into the hollow threaded ball. The end of the double-section bolt located in the hollow threaded ball is threadedly connected to the truss chord through a second threaded hole. The second threaded hole is located on the truss chord member. The double-section bolt is fastened to the truss web member and the hollow threaded ball by double nuts. A protective shell is detachably fitted over the double-section bolt.

[0008] Furthermore, the double-section bolt includes a large threaded shaft and a small threaded shaft with different shaft diameters and opposite threads. The large threaded shaft is threadedly engaged with a double nut, and the small threaded shaft is threadedly engaged with a first threaded hole and a second threaded hole.

[0009] Furthermore, the truss web includes a truss web body, one end of which is welded with a tapered tube, and one end of the tapered tube is provided with a first through hole. The threaded end of the double-section bolt passes through the first through hole from the inside of the truss web and extends out of the first through hole.

[0010] Furthermore, the double nut comprises a thick nut and a thin nut with opposite threads, the thick nut being disposed below the thin nut.

[0011] Furthermore, two stiffening ribs are provided, and the stiffening ribs are arc-shaped. The two stiffening ribs are welded to the outer side wall of the truss chord. The arc-shaped ends of the stiffening ribs are welded to the hollow threaded ball. The diameter of the stiffening ribs is the same as the diameter of the hollow threaded ball.

[0012] Furthermore, the hollow threaded ball is composed of two hollow hemispheres joined together.

[0013] Furthermore, structural weather-resistant adhesive is embedded between the protective shell and the truss web members, and between the protective shell and the hollow threaded ball.

[0014] Furthermore, a second through hole penetrating the center of the hollow threaded ball is provided on the ball, and the truss chord is provided in the second through hole. The diameter of the second through hole is 5 to 10 mm larger than the diameter of the truss chord.

[0015] A moisture-proof and corrosion-resistant space truss connection unit includes multiple horizontal units connected vertically by truss web members; each horizontal unit includes multiple hollow threaded ball bearings located on the same horizontal plane, the hollow threaded ball bearings in the horizontal unit are connected by the same truss chord along the axial direction of the truss chord, and the hollow threaded ball bearings in the horizontal unit located on different truss chords are connected by truss web members.

[0016] The application method of moisture-proof and corrosion-resistant space truss connection nodes includes the following steps: Step 1: Make the first threaded hole and the second through hole on the two hollow hemispheres. The location and number of the first threaded holes are determined according to the construction needs. Step 2: Make second threaded holes on the truss chords that match the first threaded holes and weld stiffening ribs. The position and number of the second threaded holes are determined based on the first threaded holes and the truss web members. Step 3: Clean the outer surface of the double nuts, apply primer, spray paint, and allow them to dry and cure for moisture and corrosion prevention. Step 4: Insert the truss chord through the hollow hemisphere into the second through hole, and weld the joint of the two hollow hemispheres to the truss chord and stiffening rib in sequence. Step 5: After the threaded end of the double-section bolt passes through the first through hole of the tapered tube inside the truss web member, weld the truss web member and the tapered tube, and screw in the thin nut and thick nut in sequence to the large thread shaft. Rotate the thin nut and thick nut in opposite directions to achieve a self-locking state. Step 6: Transport the truss web members and the truss chord members connected with hollow threaded ball joints to the construction site. After the truss web members are anchored to the hollow threaded ball joints and the truss chord members in sequence with double-section bolts, tighten the truss web members and the hollow threaded ball joints with double nuts to complete the assembly of the connection nodes. Step 7: Secure the protective shell tightly to the outside of the double nuts, and embed structural weather-resistant adhesive into the gap between the protective shell and the connection node.

[0017] The beneficial effects of this invention are as follows: First, the hollow spherical shell used in the invention reduces the exposed area of ​​the truss nodes, which can effectively improve the moisture-proof and corrosion-proof performance of the nodes and significantly reduce the cost of later maintenance and repair.

[0018] Moreover, the simultaneous connection of the double-section bolt with the first threaded hole of the hollow threaded ball and the second threaded hole of the truss chord effectively enhances the anchorage bearing capacity of the connection node; the stiffening ribs set between the truss chord and the hollow threaded ball greatly improve the axial stiffness and bearing capacity of the connection node.

[0019] In addition, the double-nut paint treatment, combined with the outer protective shell, effectively prevents moisture and chemicals from seeping into the connection node due to poor sealing of the double-nut joints.

[0020] This patent solves the corrosion and moisture-proof problems of traditional welded space tube truss structures. It features a high degree of node assembly, significant economic benefits, and effectively extends the service life of truss nodes, ensuring the long-term stability and safety of large-span space tube truss nodes. Attached Figure Description

[0021] Figure 1 This is an exploded view of the overall structure of the connection node according to a specific embodiment of the present invention; Figure 2 This is a cross-sectional view of a connection node according to a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the connection structure between the double-segment bolt and the double-nut of the present invention; Figure 4 This is a schematic diagram of the double-segment bolt structure of the present invention; Figure 5 This is a schematic diagram of the connection unit structure in a specific embodiment two of the present invention.

[0022] Labels in the diagram: 1. Truss chord; 2. Hollow threaded ball; 21. Hollow hemisphere; 3. Double-section bolt; 31. Large threaded shaft; 32. Small threaded shaft; 4. Stiffening rib; 5. Truss web member; 6. Tapered tube; 7. Thin nut; 8. Thick nut; 9. Protective shell; 10. First through hole; 11. Second through hole; 12. First threaded hole; 13. Second threaded hole. Detailed Implementation

[0023] To make the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are merely one implementation method and do not represent all embodiments.

[0024] Example 1: Combination Figures 1-4 This embodiment provides a moisture-proof and corrosion-resistant space truss connection node, including a truss chord 1, a hollow threaded ball 2, a double-section bolt 3, and a truss web member 5. The truss chord 1 passes through and is fixedly connected to the hollow threaded ball 2 through a stiffening rib 4. The hollow threaded ball 2 is provided with multiple first threaded holes 12 for the double-section bolt 3 to pass through. One end of the double-section bolt 3 is connected to the truss web member 5, and the other end of the double-section bolt 3 is screwed into the first threaded hole 12 and extends into the hollow threaded ball 2. One end of the double-section bolt 3 located in the hollow threaded ball 2 is threadedly connected to the truss chord 1 through a second threaded hole 13. The second threaded hole 13 is provided on the truss chord 1. The double-section bolt 3 is fastened to the truss web member 5 and the hollow threaded ball 2 by double nuts. The double-section bolt 3 is covered with a protective shell 9.

[0025] Specifically, the double-section bolt 3 includes a large threaded shaft 31 and a small threaded shaft 32 with different shaft diameters and opposite threads. The large threaded shaft 31 is threadedly engaged with a double nut, and the small threaded shaft 32 is threadedly engaged with a first threaded hole 12 and a second threaded hole 13. The large threaded shaft 31 is located on the outer surface of the hollow threaded ball 2 and controls the rotation of the double-section bolt 3. The small threaded shaft 32 passes through the hollow threaded ball 2 and connects with the hollow threaded ball 2 and the truss chord 1.

[0026] Specifically, the double nuts include a thick nut 8 and a thin nut 7 with opposite threads. The thick nut 8 is positioned below the thin nut 7, allowing it to withstand greater load-bearing capacity. Both the thin nut 7 and the thick nut 8 have their outer surfaces painted as a corrosion and moisture-proofing measure.

[0027] Specifically, the truss web member 5 includes a truss web member body, one end of which is welded with a tapered tube 6. One end of the tapered tube 6 has a first through hole 10. The threaded end of the double-segment bolt 3 passes through the first through hole 10 from inside the truss web member 5 and extends out of the first through hole 10. The double-segment bolt 3 is fixed inside the truss web member 5 through the tapered tube 6. Preferably, the tapered tube 6 is made of steel.

[0028] Specifically, two stiffening ribs 4 are provided. The stiffening ribs 4 are arc-shaped, and the two stiffening ribs 4 are welded to the outer wall of the truss chord 1. The arc-shaped ends of the stiffening ribs 4 are welded to the hollow threaded ball 2. The diameter of the stiffening ribs 4 is the same as the diameter of the hollow threaded ball 2. The arc-shaped stiffening ribs 4 increase the welding surface between the truss chord 1 and the hollow threaded ball 2, greatly improving the axial stiffness and load-bearing capacity of the connection node.

[0029] Specifically, a second through hole 11 is provided on the hollow threaded ball 2, penetrating the center of the ball. The truss chord 1 is arranged in the second through hole 11. The diameter of the second through hole 11 is 5 to 10 mm larger than the diameter of the truss chord 1, so that the truss chord 1 can pass through the second through hole 11.

[0030] Specifically, the hollow threaded ball 2 is composed of two hollow hemispheres 21 spliced ​​together. The use of hollow spherical shells reduces the exposed area of ​​the truss nodes, which can effectively improve the moisture-proof and corrosion-proof performance of the nodes and significantly reduce the cost of later maintenance and repair.

[0031] Specifically, structural weather-resistant adhesive is embedded between the protective shell 9 and the truss web member 5, and between the protective shell 9 and the hollow threaded ball 2. The protective shell 9 is made of corrosion-resistant material, preferably stainless steel or polymer material. The structural weather-resistant adhesive has the characteristics of strong weather resistance, high adhesion, and resistance to chemical corrosion, and can play a role in sealing and connection.

[0032] The application method of moisture-proof and corrosion-resistant space truss connection nodes includes the following steps: Step 1: Make a first threaded hole 12 and a second through hole 11 on the two hollow hemispheres 21. The position and number of the first threaded holes 12 are determined according to the construction needs.

[0033] Step 2: Make a second threaded hole 13 on the truss chord 1 that matches the first threaded hole 12 and weld stiffening ribs 4. The position and number of the second threaded holes 13 are determined according to the first threaded hole 12 and the truss web members 5.

[0034] Step 3: Clean the outer surface of the double nuts, apply primer, spray paint, and allow them to dry and cure for moisture and corrosion prevention. Step 4: Insert the truss chord 1 through the hollow hemisphere 21 into the second through hole 11, and weld the joint of the two hollow hemispheres 21 to the truss chord 1 and the stiffening rib 4 in sequence.

[0035] Step 5: After the threaded end of the double-section bolt 3 passes through the first through hole 10 of the tapered tube 6 from the body of the truss web member 5, weld the body of the truss web member 5 and the tapered tube 6, and screw in the thin nut 7 and the thick nut 8 in sequence to the large thread shaft 31. Rotate the thin nut 7 and the thick nut 8 in opposite directions to achieve a self-locking state.

[0036] Step 6: Transport the truss web member 5 and the truss chord member 1 connected with the hollow threaded ball 2 to the construction site. After the truss web member 5 is anchored to the hollow threaded ball 2 and the truss chord member 1 in sequence by the double-section bolts 3, tighten the truss web member 5 and the hollow threaded ball 2 with double nuts to complete the assembly of the connection node.

[0037] The specific application methods of double nuts are as follows: First, double nuts achieve self-locking by using two wrenches to rotate the thin nut 7 and the thick nut 8 in opposite directions until they are tightly pressed together, achieving a self-locking state. Second, double nuts secure the truss web member 5 and the hollow threaded ball 2 by aligning the double-section bolt 3 with the threaded hole on the hollow ball shell, and screwing on the thin nut 7 and the thick nut 8 in the self-locking state, causing the double-section bolt 3 to rotate, thus anchoring the double-section bolt 3 sequentially to the hollow threaded ball 2 and the truss chord member 1. Then, using two wrenches, rotate the thin nut 7 and the thick nut 8 in opposite directions to unlock them from the double-section bolt 3. Finally, screw the thin nut 7 until it is tightly pressed against the tapered tube 6, and screw the thick nut 8 until it is tightly pressed against the thin nut 7, completing the installation of the connection node.

[0038] Step 7: Secure the protective shell 9 tightly to the outside of the double nuts, and embed structural weather-resistant adhesive into the gap between the protective shell 9 and the connection node.

[0039] Example 2: Combination Figures 1-5 This invention also provides a moisture-proof and corrosion-resistant space truss connection unit, comprising multiple horizontal units connected vertically by truss web members 5; each horizontal unit includes multiple hollow threaded ball bearings 2 located on the same horizontal plane, the hollow threaded ball bearings 2 within the horizontal unit are connected along the axial direction of the truss chord 1 via the same truss chord 1, and the hollow threaded ball bearings 2 located on different truss chord 1 within the horizontal unit are connected by truss web members 5. As a preferred embodiment, the horizontal unit in this embodiment consists of four hollow threaded ball bearings 2 located on the same horizontal plane, with two truss chord 1 within the horizontal unit respectively passing through two hollow threaded ball bearings 2, the two truss chord 1 being arranged in parallel, and the hollow threaded ball bearings 2 located on different truss chord 1 being connected by truss web members 5. Along the centerline direction of this horizontal unit, it connects upwards to the same hollow threaded ball bearing 2 within the upper horizontal unit. Each hollow threaded ball bearing 2 is connected to hollow threaded ball bearings 2 outside the horizontal unit via truss web members 5, which can significantly improve the stability and safety of its structure.

[0040] The specific embodiments of the present invention have been described in detail above with reference to the figures, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A moisture-proof and corrosion-resistant space truss connection node, characterized in that: The truss includes a chord (1), a hollow threaded ball (2), a double-section bolt (3), and a truss web member (5). The truss chord (1) passes through the hollow threaded ball (2) and is fixedly connected to the hollow threaded ball (2) through a stiffening rib (4). The hollow threaded ball (2) is provided with multiple first threaded holes (12) through which the double-section bolt (3) passes. One end of the double-section bolt (3) is connected to the truss web member (5), and the other end of the double-section bolt (3) is screwed into the first threaded hole (12) and extends into the hollow threaded ball (2). One end of the double-section bolt (3) located in the hollow threaded ball (2) is threadedly connected to the truss chord (1) through a second threaded hole (13). The second threaded hole (13) is provided on the truss chord (1). The double-section bolt (3) is fastened to the truss web member (5) and the hollow threaded ball (2) through double nuts. The double-section bolt (3) is covered with a protective shell (9).

2. The moisture-proof and corrosion-resistant space truss connection node according to claim 1, characterized in that: The double-section bolt (3) includes a large thread shaft (31) and a small thread shaft (32) with different shaft diameters and opposite threads. The large thread shaft (31) is set outside the hollow threaded ball (2) and threaded with a double nut. The small thread shaft (32) is set inside the hollow threaded ball (2) and threaded with the first threaded hole (12) and the second threaded hole (13).

3. The moisture-proof and corrosion-resistant space truss connection node according to claim 2, characterized in that: The truss web member (5) includes a truss web member body, one end of which is welded with a tapered tube (6), and one end of the tapered tube (6) is provided with a first through hole (10). The threaded end of the double-section bolt (3) passes through the first through hole (10) from the inside of the truss web member (5) and extends out of the first through hole (10).

4. The moisture-proof and corrosion-resistant space truss connection node according to claim 3, characterized in that: The double nut includes a thick nut (8) and a thin nut (7) with opposite threads, the thick nut (8) being positioned below the thin nut (7).

5. The moisture-proof and corrosion-resistant space truss connection node according to claim 1, characterized in that: Two stiffening ribs (4) are provided. The stiffening ribs (4) are arc-shaped. The two stiffening ribs (4) are welded to each other on the outer side wall of the truss chord (1). The arc-shaped end of the stiffening rib (4) is welded to the hollow threaded ball (2). The diameter of the stiffening rib (4) is the same as the diameter of the hollow threaded ball (2).

6. The moisture-proof and corrosion-resistant space truss connection node according to claim 1, characterized in that: The hollow threaded ball (2) is composed of two hollow hemispheres (21) joined together.

7. The moisture-proof and corrosion-resistant space truss connection node according to claim 1, characterized in that: Structural weather-resistant adhesive is embedded between the protective shell (9) and the truss web member (5), and between the protective shell (9) and the hollow threaded ball (2).

8. The moisture-proof and corrosion-resistant space truss connection node according to claim 1, characterized in that: A second through hole (11) is provided on the hollow threaded ball (2) and passes through the center of the ball. The truss chord (1) is provided in the second through hole (11). The diameter of the second through hole (11) is 5 to 10 mm larger than the diameter of the truss chord (1).

9. A moisture-proof and corrosion-resistant space truss connection unit, connected by any one of the connection nodes described in claims 1-8, characterized in that: It includes multiple horizontal units connected vertically by truss web members (5); each horizontal unit includes multiple hollow threaded ball (2) located on the same horizontal plane, the hollow threaded ball (2) in the horizontal unit are connected by the same truss chord (1) along the axial direction of the truss chord (1), and the hollow threaded ball (2) located on different truss chords (1) in the horizontal unit are connected by truss web members (5).

10. The application method of the moisture-proof and corrosion-resistant space truss connection node as described in claim 4, characterized in that, Includes the following steps: Step 1: Make a first threaded hole (12) and a second through hole (11) on the two hollow hemispheres (21); Step 2: Open a second threaded hole (13) on the truss chord (1) that matches the first threaded hole (12) and weld stiffening ribs (4). The position and number of the second threaded holes (13) are determined according to the first threaded hole (12) and the truss web members (5). Step 3: Clean the outer surface of the double nuts, apply primer, spray paint, and allow them to dry and cure for moisture and corrosion prevention. Step 4: Insert the truss chord (1) through the hollow hemisphere (21) into the second through hole (11), and weld the joint of the two hollow hemispheres (21) to the truss chord (1) and the stiffening rib (4) in sequence. Step 5: After the threaded end of the double-section bolt (3) passes through the first through hole (10) of the tapered tube (6) from the truss web member (5), weld the truss web member (5) and the tapered tube (6), and screw in the thin nut (7) and the thick nut (8) in sequence to the large thread shaft (31). Rotate the thin nut (7) and the thick nut (8) in opposite directions to achieve a self-locking state. Step 6: Transport the truss web members (5) and the truss chord members (1) connected with hollow threaded ball (2) to the construction site. After the truss web members (5) are anchored to the hollow threaded ball (2) and the truss chord members (1) in sequence by double bolts (3), the truss web members (5) and the hollow threaded ball (2) are tightened with double nuts to complete the assembly of the connection nodes. Step 7: Secure the protective shell (9) to the outside of the double nuts, and embed structural weather-resistant adhesive into the gap between the protective shell (9) and the connection node.

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