Hollow sphere joint of space grid structure and installation method

Abstract

The invention discloses a hollow sphere joint of a space grid structure and an installation method.The hollow sphere joint comprises a hollow sphere, a threaded sleeve, a conical head and a tubular rod piece, the threaded sleeve is welded to the outer surface of the hollow sphere, the conical head is welded to one end of the tubular rod piece, and the conical head is fixedly connected with the threaded sleeve through a high-strength bolt; cranked levers are circumferentially distributed on the threaded sleeve, the middles of the cranked levers are rotationally connected with the threaded sleeve, one ends of the cranked levers are clamped with the conical head, the other ends of the cranked levers extend into the threaded sleeve and abut against the high-strength bolt, and the conical head is welded to the tubular rod piece; compared with a bolt sphere joint, the welding hollow sphere joint is small in steel amount, light in weight and small in welding operation difficulty, the welding quality is easy to guarantee, the construction difficulty is reduced, the construction quality and speed are effectively improved, the construction cost is reduced, the assembly requirement of a space grid structure is met, and the joint assembly strength is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structures, and in particular to a hollow spherical node of a space grid structure and an installation method thereof. Background Art

[0002] The nodes of the space grid structure are space nodes, which gather a large number of rods from different directions and have a relatively complex structure. Therefore, the rationality of the design of the space grid structure node directly affects the stress performance, manufacturing and installation, steel consumption and engineering cost of the entire structure, and is one of the important links in the design of the space grid structure. Round steel tube rods are the main form of space grid structure rods. The round steel tube rods are connected together through nodes to form a space grid structure. A good space grid structure node should have the characteristics of light weight, simple structure, reliable force transmission, and easy processing and assembly.

[0003] The nodes of large-span space grid structures are mainly divided into bolt-ball nodes and welded hollow ball nodes. Bolt-ball nodes connect rods and spheres through high-strength bolts. The installation process is simple and fast, and no on-site welding is required, which can greatly shorten the construction period. Bolt connections are not affected by factors such as weather and site. They have strong adaptability to the construction environment and can be prefabricated in the factory and assembled on site. The construction efficiency is high, but the bolt ball is a solid ball. When the diameter of the sphere is large, the weight of the bolt ball is very large, resulting in excessive total steel consumption and weight of the structure; the welded ball is a hollow ball, which is suitable for ball nodes with larger diameters. When subjected to large loads and complex stress states, the reliability of welded ball nodes is higher, but the quality of welded ball nodes is greatly affected by welding technology and the technical level of welders. If the welding quality is not good, welding defects such as pores, slag inclusions, cracks, etc. are prone to occur, affecting the strength and durability of the node. In addition, welding work needs to be carried out on site, and the construction environment is complex, which is greatly affected by factors such as weather and site.

[0004] To this end, the present application proposes a hollow spherical node of a spatial grid structure and an installation method to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a hollow ball node of a space grid structure with light weight, low cost and high construction efficiency and an installation method thereof.

[0006] In order to solve the above technical problems, the present invention provides a hollow sphere node of a spatial grid structure, which includes a hollow sphere, a threaded sleeve, a cone head and a tubular rod. The threaded sleeve is welded to the outer surface of the hollow sphere, the cone head is welded to one end of the tubular rod, the cone head is fixedly connected to the threaded sleeve by a high-strength bolt, a curved rod is distributed circumferentially on the threaded sleeve, the middle part of the curved rod is rotatably connected to the threaded sleeve, one end of the curved rod is clamped with the cone head, the other end of the curved rod extends into the interior of the threaded sleeve and abuts against the high-strength bolt, and the cone head is welded to the tubular rod.

[0007] Preferably, a positioning bolt is threadedly connected to the surface of the hollow ball, the positioning bolt is located inside a threaded sleeve, and an outer side wall of a nut of the positioning bolt is formed with an external thread matching the internal thread of the threaded sleeve.

[0008] Preferably, a cushion block is provided in the threaded sleeve, and the cushion block abuts against the positioning bolt. After one end of the bent rod is clamped with the cone head, the other end of the bent rod abuts against a surface of the high-strength bolt away from the high-strength bolt.

[0009] Preferably, a groove is provided on an end surface of the threaded sleeve close to the hollow ball, and the groove angle is 45-60°.

[0010] Preferably, a plurality of wire grooves are provided on the side of the threaded sleeve, and the wire grooves are arranged along the axial direction of the threaded sleeve. Lugs are provided on both sides of the wire grooves on the outside of the threaded sleeve, the middle part of the bent rod is connected to the lug axis, and one end of the bent rod extends from the wire groove into the interior of the threaded sleeve.

[0011] Preferably, a clamping head is provided at one end of the curved rod, and a socket is provided on the side wall of the cone head, and the clamping head is clamped with the socket.

[0012] Preferably, a pressure head is provided at the other end of the curved rod, and the pressure head abuts against the end of the high-strength bolt. After the high-strength bolt is screwed into the threaded sleeve, it abuts against the pressure head, driving the curved rod to rotate, and the clamping head at the end of the curved rod is clamped into the socket.

[0013] Preferably, a hexagonal rotating sleeve is provided between the threaded sleeve and the cone head, the high-strength bolt passes through the hexagonal rotating sleeve and is threadedly connected to the threaded sleeve, pins are provided radially between the hexagonal rotating sleeve and the high-strength bolt, an axial long groove is provided on the high-strength bolt, a sinking hole is provided at one end of the long groove away from the threaded sleeve, the pin passes through the hexagonal rotating sleeve and is inserted into the long groove of the high-strength bolt, and after the high-strength bolt is rotated until the threaded sleeve and the hexagonal rotating sleeve are tightly fitted, the pin is inserted into the sinking hole.

[0014] Preferably, a surface of the threaded sleeve is provided with a first serrated surface, and a surface of the hexagonal rotating sleeve is provided with a second serrated surface, and the first serrated surface is meshed with the second serrated surface.

[0015] A method for installing a hollow spherical node of a space grid structure comprises the following steps:

[0016] S1. Prepare the hollow ball, threaded sleeve, cone head and tubular rod in the factory according to the design drawings, cut the wire groove on the threaded sleeve, weld lugs on both sides of the wire groove, connect the bent rod with the lug shaft, process several threaded holes on the hollow ball, screw the positioning bolts into the threaded holes until they are tightened, thread the threaded sleeve with the positioning bolts until the threaded sleeve and the hollow ball are tightly attached, then weld the groove of the threaded sleeve with the hollow ball, and open a socket on the designed size of the cone head;

[0017] S2. Transport the accessories of the empty mesh structure to the construction site. At the construction site, pass the high-strength bolt through the cone head and the hexagonal rotating sleeve and then thread it with the threaded sleeve. Pass the pin through the hexagonal rotating sleeve and insert it into the long groove of the high-strength bolt. Twist the hexagonal rotating sleeve to drive the high-strength bolt to rotate, so that the high-strength bolt is threadedly connected with the threaded sleeve, and then the end faces of the threaded sleeve, the hexagonal rotating sleeve and the cone head are tightly attached. The end of the high-strength bolt squeezes the bent rod, so that one end of the bent rod is inserted into the socket of the cone head. Continue to rotate the hexagonal rotating sleeve until the pin moves to the sinking hole, insert the pin into the sinking hole, and complete the installation of the single node.

[0018] S3. Repeat step S2 until all the nodes of the tubular rods on the hollow sphere are installed.

[0019] The beneficial effects of the present invention are as follows: the welded hollow ball node adopted by the present invention has less steel and lighter weight than the bolt ball node, and most of the welding work of the node is completed in the factory and is not affected by the external environment of the construction site. The welding work is easy and the welding quality is easy to ensure. The bolts are assembled on the construction site, and the welding work is less and the welding difficulty is low, which reduces the construction difficulty, effectively improves the construction quality and speed, reduces the construction cost, and meets the assembly requirements of the spatial grid structure; the curved rod arranged on the threaded sleeve cooperates with the high-strength bolt, so that the curved rod is clamped with the cone head, thereby improving the node assembly strength.

[0020] The positioning bolt is arranged on the hollow ball, which improves the positioning accuracy of the threaded sleeve, facilitates the welding of the threaded sleeve and the hollow ball, and improves the accuracy of welding positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the hollow spherical node of the space grid structure in the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of the overall structural section of the hollow spherical node of the spatial grid structure in the present invention;

[0023] Figure 3It is a schematic plan view of the overall structural section of the hollow spherical node of the space grid structure in the present invention;

[0024] Figure 4 It is a schematic diagram of the threaded sleeve structure of the hollow ball node of the space grid structure in the present invention;

[0025] Figure 5 It is a three-dimensional schematic diagram of the curved rod structure of the hollow spherical node of the spatial grid structure in the present invention;

[0026] Figure 6 It is a schematic diagram of the installation of the threaded sleeve and the hexagonal rotating sleeve of the hollow ball node of the space grid structure in the present invention;

[0027] Figure 7 It is a schematic diagram of the connection between the threaded sleeve and the hexagonal rotating sleeve of the hollow ball node of the space grid structure in the present invention;

[0028] Figure 8 It is a schematic diagram of the connection between high-strength bolts and pins of the hollow spherical nodes of the spatial grid structure in the present invention.

[0029] In the figure: 1. hollow ball; 2. threaded sleeve; 3. cone head; 4. tubular rod; 5. high-strength bolt; 6. bent rod; 7. positioning bolt; 8. spacer; 9. groove; 10. wire groove; 11. lug; 12. clamp; 13. socket; 14. pressure head; 15. hexagonal rotating sleeve; 16. pin; 17. first serrated surface; 18. second serrated surface; 19. long groove; 20. sink hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. All directional indications in the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] like Figure 1-8 As shown, this embodiment provides a hollow ball node of a spatial grid structure, which includes a hollow ball 1, a threaded sleeve 2, a cone head 3 and a tubular rod 4. The threaded sleeve 2 is welded to the outer surface of the hollow ball 1, the cone head 3 is welded to one end of the tubular rod 4, and the cone head 3 is fixedly connected to the threaded sleeve 2 through a high-strength bolt 5. A curved rod 6 is distributed circumferentially on the threaded sleeve 2, the middle part of the curved rod 6 is rotatably connected to the threaded sleeve 2, one end of the curved rod 6 is clamped with the cone head 3, the other end of the curved rod 6 extends into the interior of the threaded sleeve 2 and abuts against the high-strength bolt 5, and the cone head 3 is welded to the tubular rod 4.

[0032] like Figure 2-3As shown, the surface of the hollow ball 1 is threadedly connected with a positioning bolt 7, which is located inside the threaded sleeve 2, and the outer wall of the nut of the positioning bolt 7 is formed with an external thread matching the internal thread of the threaded sleeve 2. When installing, a threaded hole is first punched at a specified position of the hollow ball 1, and the positioning bolt 7 is screwed into the threaded hole for fixing. The threaded sleeve 2 is pre-fixed by the positioning bolt 7, and then the threaded sleeve 2 is welded to the hollow ball 1. A cushion block 8 is provided inside the threaded sleeve 2, and the cushion block 8 abuts against the positioning bolt 7. After one end of the bent rod 6 is clamped with the cone head 3, the other end of the bent rod 6 abuts against a surface of the high-strength bolt 5, and the cushion block 8 abuts against the bent rod 6 to improve the abutment and fixing effect on the end of the bent rod 6.

[0033] like Figure 4 As shown, a groove 9 is provided on the end face of the threaded sleeve 2 close to the hollow ball 1, and the angle of the groove 9 is 45-60 degrees. The groove 9 is arranged around the outer ring of the threaded sleeve 2, and the space between the groove 9 and the hollow ball 1 is used to form a welding gap to improve the welding quality.

[0034] like Figure 2 , 4 As shown in Figures 5 and 6, the side of the threaded sleeve 2 is provided with a plurality of wire grooves 10, which are circumferentially distributed on the side of the threaded sleeve 2. In this example, four wire grooves 10 are provided, and the specific number of wire grooves 10 can be adjusted according to actual needs. The wire grooves 10 are provided along the axial direction of the threaded sleeve 2, and lugs 11 are provided on the outer side of the threaded sleeve 2 on both sides of the wire grooves 10. The middle part of the bent rod 6 is axially connected to the lugs 11, and one end of the bent rod 6 extends from the wire grooves 10 into the inside of the threaded sleeve 2, so that the bent rod 6 can rotate around the lugs 11. A clamping head 12 is provided at one end of the bent rod 6, and a socket 13 is provided on the side wall of the cone head 3, and the clamping head 12 is clamped with the socket 13. A pressure head 14 is provided at the other end of the bent rod 6, and the pressure head 14 abuts against the end of the high-strength bolt 5. After the high-strength bolt 5 is screwed into the threaded sleeve 2, it abuts against the pressure head 14, driving the bent rod 6 to rotate, and the clamping head 12 at the end of the bent rod 6 is clamped into the socket 13.

[0035] like Figure 2 , 4As shown in Figures 8 and 9, a hexagonal rotating sleeve 15 is provided between the threaded sleeve 2 and the cone head, and the high-strength bolt 5 passes through the hexagonal rotating sleeve 15 and is threadedly connected to the threaded sleeve 2. A pin 16 is provided in the radial direction of the hexagonal rotating sleeve 15 and the high-strength bolt 5. An axial long groove 19 is provided on the high-strength bolt 16. A sinking hole 20 is provided at one end of the long groove 19 away from the threaded sleeve 2. The pin 16 passes through the hexagonal rotating sleeve 15 and is inserted into the long groove 19 of the high-strength bolt 5. After the high-strength bolt 5 is rotated until the threaded sleeve 2 and the hexagonal rotating sleeve 15 are tightly fitted, the pin 16 is inserted into the sinking hole 20, and the sinking hole 20 can be a threaded The lower end of the pin 16 is provided with a threaded section, which is threadedly connected to the sinking hole 20. The outer surface of the hexagonal rotating sleeve 15 is a hexagonal structure. The hexagonal rotating sleeve 15 is rotated. Since the pin 16 is inserted into the long groove 19, the circumferential direction of the high-strength bolt 5 is limited, so that when the hexagonal rotating sleeve 15 rotates, the high-strength bolt 5 is driven to rotate, so that the high-strength bolt 5 is screwed into the threaded sleeve 2, and the pin 16 slides along the long groove 19 until the pin 16 slides to the sinking hole 20 on the far right, and then the pin 16 is rotated so that the pin 16 is inserted into the sinking hole 20 to fix the high-strength bolt 5.

[0036] like Figure 6-7 As shown, one surface of the threaded sleeve 2 is provided with a first serrated surface 17, and one surface of the hexagonal rotating sleeve 15 is provided with a second serrated surface 18. The first serrated surface 17 is meshed with the second serrated surface 18. The serration directions of the first serrated surface 17 and the second serrated surface 18 are opposite, so that the two serrated surfaces can mesh, thereby achieving the purpose of preventing the threaded sleeve 2 and the hexagonal rotating sleeve 15 from rotating, thereby improving the connection stability of the high-strength bolt 5.

[0037] Example 2

[0038] A method for installing a hollow spherical node of a space grid structure comprises the following steps:

[0039] S1. Prepare the hollow ball 1, the threaded sleeve 2, the cone head 3 and the tubular rod 4 in the factory according to the design drawings, cut the wire groove 10 on the threaded sleeve 2, weld the lugs 11 on both sides of the wire groove 10, connect the bent rod 6 with the lug 11 axis, process several threaded holes on the hollow ball 1, screw the positioning bolts 7 into the threaded holes until they are tightened, thread the threaded sleeve 2 with the positioning bolts 7 until the threaded sleeve 2 is tightly attached to the hollow ball 1, then weld the groove 9 of the threaded sleeve 2 to the hollow ball 1, and open the socket 13 on the design size of the cone head 3;

[0040] S2. Transport the accessories of the empty mesh structure to the construction site. At the construction site, pass the high-strength bolt 5 through the cone head 3 and the hexagonal rotating sleeve 15 and then threadably connect it with the threaded sleeve 2. Pass the pin 16 through the hexagonal rotating sleeve 15 and insert it into the long groove 19 of the high-strength bolt 5. Twist the hexagonal rotating sleeve 15 to drive the high-strength bolt 5 to rotate, so that the high-strength bolt 5 is threadably connected with the threaded sleeve 2, and then the end faces of the threaded sleeve 2, the hexagonal rotating sleeve 15 and the cone head 3 are tightly attached. The end of the high-strength bolt 5 squeezes the bent rod 6, so that one end of the bent rod 6 is inserted into the socket 13 of the cone head 3. Continue to rotate the hexagonal rotating sleeve 15 until the pin 16 moves to the sinking hole 20, insert the pin 16 into the sinking hole 20, and complete the installation of the single node.

[0041] S3, repeat step S2 until all nodes of the tubular rods 4 on the hollow sphere 1 are installed.

[0042] The welded hollow ball 1 node used in this embodiment has less steel and lighter weight than the bolt ball node, and most of the welding work of the node is completed in the factory and is not affected by the external environment of the construction site. The welding work is easy and the welding quality is easy to ensure. The bolts are assembled on the construction site, and the welding work is less and the welding difficulty is low, which reduces the construction difficulty, effectively improves the construction quality and speed, reduces the construction cost, and meets the assembly requirements of the spatial grid structure; the curved rod 6 arranged on the threaded sleeve 2 cooperates with the high-strength bolt 5, so that the curved rod 6 is clamped with the cone head 3, thereby improving the node assembly strength; the positioning bolt 7 is arranged on the hollow ball 1, which improves the positioning accuracy of the threaded sleeve 2, facilitates the welding of the threaded sleeve 2 and the hollow ball 1, and improves the accuracy of welding positioning.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow ball node of a spatial grid structure, comprising a hollow ball, a threaded sleeve, a cone head and a tubular rod, characterized in that: The threaded sleeve is welded to the outer surface of the hollow sphere, the cone head is welded to one end of the tubular rod, the cone head is fixedly connected to the threaded sleeve by a high-strength bolt, a curved rod is distributed circumferentially on the threaded sleeve, the middle part of the curved rod is rotatably connected to the threaded sleeve, one end of the curved rod is clamped with the cone head, the other end of the curved rod extends into the interior of the threaded sleeve and abuts against the high-strength bolt, and the cone head is welded to the tubular rod.

2. The hollow spherical node of a spatial grid structure according to claim 1, characterized in that: The surface of the hollow ball is threadedly connected with a positioning bolt, the positioning bolt is located inside the threaded sleeve, and the outer side wall of the nut of the positioning bolt is formed with an external thread matching the internal thread of the threaded sleeve.

3. The hollow spherical node of a spatial grid structure according to claim 2, characterized in that: A cushion block is arranged in the threaded sleeve, and the cushion block abuts against the positioning bolt. After one end of the bent rod is clamped with the cone head, the other end of the bent rod abuts against a surface of the high-strength bolt away from the high-strength bolt.

4. The hollow spherical node of a spatial grid structure according to claim 1, characterized in that: The end surface of the threaded sleeve close to the hollow ball is provided with a groove, and the angle of the groove is 45-60 degrees.

5. The hollow spherical node of a spatial grid structure according to claim 1, characterized in that: The side of the threaded sleeve is provided with a plurality of wire grooves, and the wire grooves are arranged along the axial direction of the threaded sleeve. The outer side of the threaded sleeve is provided with lugs on both sides of the wire grooves. The middle part of the bent rod is connected to the lug axis, and one end of the bent rod extends from the wire groove into the interior of the threaded sleeve.

6. The hollow spherical node of the space grid structure according to claim 5, characterized in that: One end of the curved rod is provided with a clamping head, and the side wall of the cone head is provided with a plug hole, and the clamping head is clamped with the plug hole.

7. The hollow spherical node of the space grid structure according to claim 6, characterized in that: A pressure head is provided at the other end of the bent rod, and the pressure head abuts against the end of the high-strength bolt. After the high-strength bolt is screwed into the threaded sleeve, it abuts against the pressure head, driving the bent rod to rotate, and the clamping head at the end of the bent rod is clamped into the socket.

8. The hollow spherical node of a space grid structure according to claim 1, characterized in that: A hexagonal rotating sleeve is provided between the threaded sleeve and the cone head, the high-strength bolt passes through the hexagonal rotating sleeve and is threadedly connected to the threaded sleeve, pins are provided radially between the hexagonal rotating sleeve and the high-strength bolt, an axial long groove is provided on the high-strength bolt, a sinking hole is provided at one end of the long groove away from the threaded sleeve, the pin passes through the hexagonal rotating sleeve and is inserted into the long groove of the high-strength bolt, and after the high-strength bolt is rotated until the threaded sleeve and the hexagonal rotating sleeve are tightly fitted, the pin is inserted into the sinking hole.

9. The hollow spherical node of the space grid structure according to claim 8, characterized in that: A first serrated surface is provided on one surface of the threaded sleeve, and a second serrated surface is provided on one surface of the hexagonal rotating sleeve, and the first serrated surface is meshed with the second serrated surface.

10. A method for installing a hollow ball node of a space grid structure, characterized in that: The steps include: S1. Prepare the hollow ball, threaded sleeve, cone head and tubular rod in the factory according to the design drawings, cut the wire groove on the threaded sleeve, weld lugs on both sides of the wire groove, connect the bent rod with the lug shaft, process several threaded holes on the hollow ball, screw the positioning bolts into the threaded holes until they are tightened, thread the threaded sleeve with the positioning bolts until the threaded sleeve and the hollow ball are tightly attached, then weld the groove of the threaded sleeve with the hollow ball, and open a socket on the designed size of the cone head; S2. Transport the accessories of the empty mesh structure to the construction site. At the construction site, pass the high-strength bolt through the cone head and the hexagonal rotating sleeve and then thread it with the threaded sleeve. Pass the pin through the hexagonal rotating sleeve and insert it into the long groove of the high-strength bolt. Twist the hexagonal rotating sleeve to drive the high-strength bolt to rotate, so that the high-strength bolt is threadedly connected with the threaded sleeve, and then the end faces of the threaded sleeve, the hexagonal rotating sleeve and the cone head are tightly attached. The end of the high-strength bolt squeezes the bent rod, so that one end of the bent rod is inserted into the socket of the cone head. Continue to rotate the hexagonal rotating sleeve until the pin moves to the sinking hole, insert the pin into the sinking hole, and complete the installation of the single node. S3. Repeat step S2 until all the nodes of the tubular rods on the hollow sphere are installed.

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