CN212866317U - Shuttle-shaped circular steel tube space grid rod piece - Google Patents
Shuttle-shaped circular steel tube space grid rod piece Download PDFInfo
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- CN212866317U CN212866317U CN202021661702.1U CN202021661702U CN212866317U CN 212866317 U CN212866317 U CN 212866317U CN 202021661702 U CN202021661702 U CN 202021661702U CN 212866317 U CN212866317 U CN 212866317U
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- rod piece
- rod
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- grid
- shuttle
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Abstract
The utility model discloses a fusiformis circular steel tube space net member, include: the middle part of the rod piece; the end parts of the two rod pieces are fixedly connected with the ball joint; the outer diameter of the end part of at least one rod piece is smaller than that of the middle part of the rod piece, and the outer diameter of the rod piece in the area between the end part of the rod piece and the middle part of the rod piece is linearly changed along the axial direction of the rod piece to enable the grid rod piece to be in a fusiform shape. The shuttle-shaped circular steel tube space grid rod piece can be suitable for connecting bolt ball nodes and welding hollow ball nodes, is favorable for realizing the replacement of the bolt ball nodes on the welding hollow ball nodes, improves the application ratio of the bolt ball nodes in a space grid structure, and improves the on-site assembly forming efficiency; meanwhile, the consumption of steel is greatly reduced, the construction cost is reduced, and the utilization rate of steel resources is improved.
Description
Technical Field
The utility model relates to a building space grid structure, concretely relates to net member.
Background
In response to the development trend of the building industry, the factory processing and the field assembly forming of building components are greatly promoted, and the steel components have high bearing capacity and excellent processing performance, and provide good raw material conditions for the steel components adopted by buildings due to the sufficient domestic building steel.
The space grid structure belongs to one of building steel structure products, is formed by combining grid rod pieces and ball nodes at present, forms a net rack, a net shell and a three-dimensional truss through the regular combination of the grid rod pieces and the ball nodes, and can be easily applied to buildings with various spans and shapes. The grid rod piece is manufactured in a factory by directly cutting a circular steel tube with an equal section, wherein the ball joint is divided into a bolt ball joint and a welded hollow ball joint; the grid rod piece is connected with the bolt ball node through a high-strength bolt, and the grid rod piece is connected with the welded hollow ball node in a welded mode. The same ball joint needs to be connected with a plurality of grid rod pieces, and along with the increase of the diameter of the grid rod pieces, the large-diameter ball joint is correspondingly needed to ensure that all the grid rod pieces fixed on the same ball joint are prevented from colliding with each other at the end part of the grid rod pieces, so that the feasibility of assembly and construction is ensured.
Compared with a welded hollow ball node, the bolt ball node has the characteristic of high assembly forming efficiency, the conventional diameter of the bolt ball node is within 300mm, for a large-diameter circular steel tube space grid rod piece with the equal cross section, due to the limitation of the diameter of the bolt ball node, the bolt ball node is difficult to connect, the bolt ball node needs to be connected through the welded hollow ball node, and therefore the improvement of the application ratio of the bolt ball node in a space grid structure is always the aim of innovation and pursuit of engineers.
The grid rod piece mainly bears tension and pressure in use, the grid rod piece bears tension or pressure under different working conditions, and the grid rod piece bearing the pressure is difficult to fully exert the compressive property of the steel due to the restriction of the stability of a single grid rod piece, so that the utilization rate of the high-strength compressive property of the steel is low.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a fusiformis circular steel tube space net member can improve the application ratio of bolt ball node in space grid structure, can improve the utilization ratio of steel high strength crushing resistance, and it adopts following technical scheme:
a shuttle-shaped round steel tube space grid rod member, comprising: the middle part of the rod piece; the end parts of the two rod pieces are fixedly connected with the ball joint; the outer diameter of the end part of at least one rod piece is smaller than that of the middle part of the rod piece, and the outer diameter of the rod piece in the area between the end part of the rod piece and the middle part of the rod piece is linearly changed along the axial direction of the rod piece to enable the grid rod piece to be in a fusiform shape; the outer diameter of the end part of the grid rod piece is small, and the outer diameter of the middle part of the grid rod piece is large, so that the large-diameter grid rod piece is suitable for connecting bolt ball nodes, and the on-site assembly forming efficiency is improved; secondly, the stability of a single grid rod piece is obviously improved, and the steel consumption of the grid rod piece can be greatly reduced and the construction cost can be reduced under the condition of bearing the same axial pressure load; and thirdly, the diameter of the ball joint is favorably reduced, the total steel consumption of the space grid structure is further reduced, and the utilization rate of steel resources is improved.
Furthermore, the areas of all radial cross sections in the middle of the rod piece are equal along the axial direction of the rod piece and are cylindrical; this is another kind of structural style of fusiformis circular steel tube space grid member for single grid member axial force transmission is more reasonable and smooth and easy in the structure, makes things convenient for the interior processing and manufacturing of factory of grid member simultaneously.
Further, the wall thickness of the rod piece in the area between the end part of the rod piece and the middle part of the rod piece is equal along the axial direction of the rod piece; the existing finished steel pipes can be fully selected to complete the in-plant manufacturing of the whole grid rod piece, and the difficulty in purchasing raw materials required by the manufacturing of the grid rod piece is avoided.
Further, the areas of all radial cross sections of the area between the end part of the rod piece and the middle part of the rod piece are equal along the axial direction of the rod piece; the wall thickness of the rod piece is optimized, the mechanical property of the high-strength steel is fully exerted, and the consumption of the steel is further reduced.
Further, the grid rod is formed by using a steel pipe or a steel plate as a raw material.
Further, the steel pipe is a seamless steel pipe, a straight seam steel pipe, a rolled steel pipe or a conical steel pipe.
Furthermore, the ball joint is a bolt ball joint or a welded hollow ball joint.
The shuttle-shaped circular steel tube space grid rod piece can be suitable for connecting bolt ball nodes and welding hollow ball nodes, is favorable for realizing the replacement of the bolt ball nodes on the welding hollow ball nodes, improves the application ratio of the bolt ball nodes in a space grid structure, and improves the on-site assembly forming efficiency; meanwhile, the consumption of steel is greatly reduced, the construction cost is reduced, and the utilization rate of steel resources is improved.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic structural view of a first embodiment of the shuttle-shaped circular steel tube space grid rod member of the present invention;
FIG. 2 is a schematic plan view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
fig. 5 is a schematic structural view of a second embodiment of the shuttle-shaped circular steel tube space grid rod member of the present invention;
FIG. 6 is a schematic plan view of FIG. 5;
FIG. 7 is a cross-sectional view taken at C-C of FIG. 6;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 6;
FIG. 9 is a schematic structural view of a bolt-ball joint and a welded hollow-ball joint respectively connected to two ends of the second embodiment.
Detailed Description
The utility model relates to a fusiformis circular steel tube space net member, include: a rod middle part 11; the two rod end parts 12 are fixedly connected with the ball joint; the grid bar 1 may adopt two embodiments as follows.
The first embodiment is as follows:
as shown in fig. 1 to 4, the outer diameters of the two rod end portions 12 are smaller than the outer diameter of the rod middle portion 11, and the outer diameters of the rod in the region between the rod end portions 12 and the rod middle portion 11 linearly change along the rod axial direction to make the lattice rod 1 in a shuttle shape.
Example two:
as shown in fig. 5 to 8, the outer diameters of the two rod end portions 12 are smaller than the outer diameter of the rod middle portion 11, the outer diameters of the rod in the region between the rod end portions 12 and the rod middle portion 11 linearly change along the rod axial direction to make the grid rod 1 in a shuttle shape, and the radial cross-sectional areas of the rod middle portion 11 are equal along the rod axial direction and are cylindrical.
The difference between the first embodiment and the second embodiment is that: in the first embodiment, the middle part 11 of the rod is not provided with the circular steel tube with the uniform cross section, and is a pure fusiform circular steel tube space grid rod.
The principle and the structural requirement of determining the sizes of the shuttle-shaped circular steel tube spatial grid rod pieces are as follows:
(a) the wall thickness t0 of the section of the end part 12 of the rod piece and the wall thickness t1 of the section of the middle part 11 of the rod piece are equal in wall thickness along the axial direction of the rod piece, and can also be gradually changed in thickness so as to ensure that the areas of all radial sections are equal, and further exert the mechanical property of high-strength steel;
(b) the grid rod pieces 1 positioned on the same ball joint cannot collide with each other;
(c) the outer diameter D0 of the rod end 12, the outer diameter D1 of the rod middle 11, the equal section length L2 of the rod middle 11, the length L1 of the grid rod 1, the section wall thickness t0 of the rod end 12 and the section wall thickness t1 of the rod middle 11 are designed and determined according to the use function and the load condition of the space grid structure, and the structural safety of the shuttle-shaped circular steel tube space grid rod in the use process is guaranteed.
The space grid unit is formed by combining and connecting shuttle-shaped circular steel tube space grid rod pieces and bolt ball nodes or welded hollow ball nodes, the ball nodes at two ends of the space grid unit can be all the bolt ball nodes or all the welded hollow ball nodes, or one end of the space grid unit is the bolt ball node, and the other end of the space grid unit is the welded hollow ball node.
As shown in fig. 9, the two-end ball nodes are exemplified by a bolt ball node 7 at one end and a welded hollow ball node 9 at the other end. The center lengths L0 of the two ball nodes are determined according to the engineering use function and the load condition.
Wherein the shuttle-shaped circular steel tube space grid rod piece 1 is connected with the bolt ball 7:
(a) and (3) processing in a factory: firstly, placing a high-strength bolt 8 in a shuttle-shaped circular steel tube space grid rod piece 1, then assembling a conical head 3 at the end part 12 of the rod piece, welding to generate a welding seam 2, and finally leading the high-strength bolt 8 out of the conical head 3 and screwing a sleeve 5 on the high-strength bolt 8;
(b) assembling on site: the sleeve 5 is rotated, and the fastening screw 4 drives the high-strength bolt 8 to keep synchronous rotation, so that the high-strength bolt 8 is screwed into the high-strength bolt hole 6 in the bolt ball joint 7.
The fusiform circular steel tube space grid rod piece 1 is connected with the welding hollow sphere node 9 by welding.
Through the following examples, the steel saving rate of the pure shuttle-shaped circular steel tube space grid rod piece of the embodiment of analyzing and comparing the theoretical axial pressure load of the circular steel tube space grid rod piece with the equal cross section is not lower than, the grid rod piece is made of Q235B, and two ends of the grid rod piece are hinged.
Example one: the weight of the spatial grid rod piece of the circular steel tube with the equal cross section, the outer diameter, the wall thickness and the length of which are 89mm, 4mm and 4200mm respectively, is 35.20 Kg; the equal length and equivalent mechanical property adopts a pure fusiform circular steel tube space grid rod piece with the end part outer diameter, the middle part outer diameter and the wall thickness of 75.5mm, 108mm and 3.5mm respectively, and the weight is 31.98 Kg; the steel saving rate is 9.15%.
Example two: the weight of the spatial grid rod piece of the circular steel tube with the equal cross section, the outer diameter, the wall thickness and the length of which are respectively 114mm, 5mm and 5400mm, is 72.54 Kg; the equal-length and equivalent mechanical properties adopt 63.89Kg of pure fusiform circular steel tube space grid rod pieces with the end part outer diameter, the middle part outer diameter and the wall thickness of 108mm, 140mm and 4mm respectively; the steel saving rate is 11.92%.
Example three: the weight of the spatial grid rod piece of the uniform-section circular steel tube with the outer diameter, the wall thickness and the length of 133mm, 6mm and 6250mm is 117.39 Kg; the equal length and equivalent mechanical property adopts that the weight of a pure fusiform circular steel tube space grid rod piece with the end part outer diameter, the middle part outer diameter and the wall thickness of 114mm, 159mm and 5mm respectively is 101.29 Kg; the steel saving rate was 13.71%.
Example four: the weight of the spatial grid rod piece of the circular steel tube with the equal cross section, the outer diameter, the wall thickness and the length of which are respectively 140mm, 8mm and 6500mm, is 169.19 Kg; the equal-length and equivalent mechanical properties adopt 144.68Kg of pure fusiform circular steel tube space grid rod pieces with the end part outer diameter, the middle part outer diameter and the wall thickness of 133mm, 180mm and 6mm respectively; the steel saving rate is 14.49%.
From the above analysis data, it can be seen that the adoption of the pure fusiform circular steel tube space grid rod member of the embodiment is beneficial to greatly reducing the steel amount for the space grid structure and greatly saving steel resources.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Any replacement of features that can be imagined by those skilled in the art without creative work when the act of infringement takes place is covered in the protection scope of the present invention.
Claims (7)
1. A shuttle-shaped round steel tube space grid rod member, comprising:
the middle part of the rod piece;
the end parts of the two rod pieces are fixedly connected with the ball joint;
the method is characterized in that:
the outer diameter of at least one rod piece end part is smaller than that of the middle part of the rod piece, and the outer diameter of the rod piece in the area between the rod piece end part and the middle part of the rod piece is linearly changed along the axial direction of the rod piece, so that the grid rod piece is in a shuttle shape.
2. The fusiform round steel tube spatial grid rod member as claimed in claim 1, wherein: the areas of all radial cross sections in the middle of the rod piece are equal along the axial direction of the rod piece and are cylindrical.
3. The shuttle-shaped circular steel tube space grid rod member as claimed in claim 1 or 2, wherein: the wall thickness of the rod piece in the area between the end part of the rod piece and the middle part of the rod piece is equal along the axial direction of the rod piece.
4. The shuttle-shaped circular steel tube space grid rod member as claimed in claim 1 or 2, wherein: the radial cross-sectional areas of the regions from the end parts of the rod piece to the middle part of the rod piece are equal along the axial direction of the rod piece.
5. The shuttle-shaped circular steel tube space grid rod member as claimed in claim 1 or 2, wherein: the grid rod piece is formed by taking a steel pipe or a steel plate as a raw material.
6. The fusiform round steel tube spatial grid rod member as claimed in claim 5, wherein: the steel pipe is a seamless steel pipe, a straight seam steel pipe, a rolled steel pipe or a conical steel pipe.
7. The fusiform round steel tube spatial grid rod member as claimed in claim 1, wherein: the ball joint is a bolt ball joint or a welded hollow ball joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661702.1U CN212866317U (en) | 2020-08-11 | 2020-08-11 | Shuttle-shaped circular steel tube space grid rod piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661702.1U CN212866317U (en) | 2020-08-11 | 2020-08-11 | Shuttle-shaped circular steel tube space grid rod piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212866317U true CN212866317U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021661702.1U Expired - Fee Related CN212866317U (en) | 2020-08-11 | 2020-08-11 | Shuttle-shaped circular steel tube space grid rod piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212866317U (en) |
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2020
- 2020-08-11 CN CN202021661702.1U patent/CN212866317U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210402 Termination date: 20210811 |