CN214498082U - High-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof - Google Patents
High-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof Download PDFInfo
- Publication number
- CN214498082U CN214498082U CN202022791799.4U CN202022791799U CN214498082U CN 214498082 U CN214498082 U CN 214498082U CN 202022791799 U CN202022791799 U CN 202022791799U CN 214498082 U CN214498082 U CN 214498082U
- Authority
- CN
- China
- Prior art keywords
- column
- plate
- steel
- lacing wire
- web plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The application discloses high-efficient anchor of superelevation layer shaped steel concrete column lacing wire is through setting up the column lacing wire preformed groove on the batten plate, batten plate fluting side and shaped steel column web welded connection. After the section steel column and the section steel beam are installed to form a stable system, binding of reinforcing steel bars in the column is carried out, and column lacing wires are connected with the section steel column through reserved grooves formed in the batten plates. The device simple structure, field operation construction convenience, the practicality is strong, is applicable to the anchor of shaped steel concrete column inner prop lacing wire, and the device preparation simple process can make fast, in batches.
Description
Technical Field
The application relates to a high-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof belongs to the construction field.
Background
Due to the requirement of building clearance and span, more and more buildings adopt reinforced concrete structures, and particularly in super high-rise buildings, a steel reinforced concrete frame-reinforced concrete core tube structure is a common form.
Due to the fact that stress and structures are complex, actual conditions of a construction site cannot be considered comprehensively by design drawings, and situations that space collision exists among columns, beam joints and steel bar anchoring and construction processes are difficult to implement are caused.
According to the requirement of a design construction drawing, when a section steel column tie bar penetrates through a section steel column web plate, tie bar holes with the aperture of 25mm need to be formed in the section steel column web plate along the length direction of a column body according to the distance of 100mm, the section loss of the section steel column can be caused by the tie bar holes, and if the section loss rate of the section steel column web plate is larger than 25%, the opening part of the section steel column web plate needs to be subjected to plug welding reinforcement.
The deepening processing of the component is carried out according to the requirement, the drawing deepening period and the component processing period are both prolonged, and after the web plate of the section steel column is perforated, the column tie bar perforation rate is low during site construction, and the construction difficulty is high.
SUMMERY OF THE UTILITY MODEL
The application provides a superelevation layer shaped steel concrete column lacing wire high-efficient anchor and core section of thick bamboo structure for solving above-mentioned technical problem.
The application provides a high-efficient anchor of superelevation layer shaped steel concrete column lacing wire includes: steel column, a plurality of lacing plate, the steel column includes: a plurality of section columns, the section columns comprising: the end plate is connected with the center area of the end plate, and the other end of the web plate of the section steel column extends outwards to form an extending end;
the web plate extending ends of the section steel columns are mutually perpendicular and welded to form the steel columns in a surrounding mode;
the batten plates are symmetrically arranged on two opposite side walls of the web plate in pairs;
the gusset plate includes: the reserved grooves are arranged at intervals along the longitudinal direction of the batten plate;
the first end of the column lacing wire is connected with the reserved groove.
Preferably, the gusset plate includes: the device comprises a preformed groove, a connecting end and a plurality of connecting plates, wherein the first ends of adjacent connecting plates are connected through the connecting end;
the second end of the connecting plate extends outwards to form an extending end;
the extending end of the connecting plate is connected with the side wall of the web plate;
the preformed groove is arranged between the adjacent connecting plates.
Preferably, the connecting plate extends outwards along the vertical connecting end.
Preferably, the groove bottom of the preformed groove is arranged on the inner side wall of the connecting end;
the other end of the reserved groove is an open groove;
the open end of the preformed groove is arranged towards the web.
Preferably, the distance between any two adjacent reserved grooves ranges from 30mm to 70 mm;
the size range of the longitudinal section of the preformed groove is 60X 30-100X 70 mm;
the distance range from the bottom of the preformed groove to the outer side wall of the connecting end is 20-30 mm.
Preferably, the thickness of the patch plate ranges from 6 mm to 14 mm.
Preferably, the section steel column includes: first shaped steel post, second shaped steel post, third shaped steel post, fourth shaped steel post, first shaped steel post includes: the first end of the first web plate is connected with the middle part of one side wall of the first end plate; the second end of the first web plate extends outwards perpendicular to the first end plate and is connected with the extending end of the third web plate;
the second type steel post includes: the first end of the second web plate is connected with the middle part of one side wall of the second end plate; the second end of the second web plate extends outwards perpendicular to the second end plate and is connected with the extending end of the fourth web plate;
the third section steel column comprises: the first end of the third web plate is connected with the middle part of one side wall of the third end plate; the second end of the third web plate extends outwards perpendicular to the third end plate;
the fourth section steel column comprises: the first end of the fourth web plate is connected with the middle part of one side wall of the fourth end plate; the second end of the fourth web extends outwardly perpendicular to the fourth end plate.
Another aspect of the present application also provides a super high-rise steel reinforced concrete frame-reinforced concrete core tube structure, including: a plurality of column longitudinal bars arranged in a building and the device as described above arranged in the super high-rise steel reinforced concrete frame-reinforced concrete core tube structure;
the column longitudinal ribs are arranged in parallel with the steel columns;
the second end of the column lacing wire is connected with the column longitudinal rib.
Preferably, the post lacing wire comprises: the first end of the first group of column lacing wires is connected with the reserved groove, and the second end of the first group of column lacing wires is connected with the column longitudinal rib;
the first group of column tie bars are arranged in parallel with the web plate of the section steel column;
and two ends of the second group of column tie bars are obliquely arranged on any two column longitudinal bars, and the projection of the first group of column tie bars on the plane where the second group of column tie bars are located forms an acute angle.
The beneficial effects that this application can produce include:
1) the application provides a high-efficient anchor of superelevation layer shaped steel concrete column lacing wire, through set up the column lacing wire preformed groove on the batten plate, batten plate fluting side and shaped steel post web welded connection. After the section steel column and the section steel beam are installed to form a stable system, binding of reinforcing steel bars in the column is carried out, and column lacing wires are connected with the section steel column through reserved grooves formed in the batten plates. The device simple structure, field operation construction convenience, the practicality is strong, is applicable to the anchor of shaped steel concrete column inner prop lacing wire, and the device preparation simple process can make fast, in batches.
2) The application provides a high-efficient anchor of superelevation layer shaped steel concrete post lacing wire takes effect of weakening through finite element simulation analysis and adopts the device that this application provided, through adopting the lacing plate after, the deformation of post stirrup and lacing wire is less, and the lacing plate is more stable with being connected of lacing wire, and is better to shaped steel and the biography power effect of stirrup, and the maximize ground plays the anchor effect of lacing wire.
3) The application provides a high-efficient anchor of superelevation layer shaped steel concrete column lacing wire, when the device of this structure of production, can effectively optimize shaped steel post web trompil, avoided causing stress concentration because of shaped steel web trompil, shorten component processing cycle simultaneously, practice thrift component processing, installation cost, simplify on-the-spot reinforcing bar construction process, improve the construction progress of superelevation layer shaped steel concrete frame-reinforced concrete core tube structure construction center pillar lacing wire ligature.
Drawings
Fig. 1 is a schematic view of a three-dimensional structure of a pile body installed by the super high-rise steel reinforced concrete column tie bar high-efficiency anchoring device provided by the application;
fig. 2 is a perspective view illustrating a lacing plate lacing wire connection state provided by the present application;
fig. 3 is a schematic perspective view of the high-efficiency anchoring device for the tie bars of the super high-rise steel reinforced concrete column provided by the application;
FIG. 4 is a schematic view of a front enlarged view of a gusset plate provided in accordance with the present application;
illustration of the drawings:
1. a batten plate; 11. a connecting plate; 2. reserving a groove; 3. a connecting end; 41. a first section steel column; 42. a second type steel column; 43. a third section steel column; 44. a fourth section steel column; 51. a first set of post lacing wires; 5. a second set of post lacing wires; 6. the post longitudinal ribs.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Referring to fig. 1-2, the application provides a high-efficient anchor of superelevation layer shaped steel concrete column lacing wire includes: the steel column comprises a plurality of section steel columns, each section steel column comprises a web plate and an end plate, one end of each web plate of each section steel column is connected with the central area of each end plate, and the other end of each web plate is perpendicular to the corresponding end plate and extends outwards to form an extending end; the extending ends of the web plates of all the section steel columns are mutually and vertically welded to form the steel columns in a surrounding mode; the batten plates 1 are symmetrically arranged on two opposite side walls of the web plate in pairs; the gusset plate 1 includes: the multiple reserved grooves 2 are arranged at intervals along the longitudinal direction of the batten plate 1; the first end of the post lacing wire is connected with the preformed groove 2.
Through setting up a plurality of lacing plates 1 in the web middle part of each type of steel column, provide powerful support for the post lacing wire, need not to trompil on the steel column, also need not to destroy the whole reliability of steel column, predetermine the groove through the setting, improve the device's site operation simplicity, the device assembly welding is simple and convenient, can realize mass production.
Referring to fig. 3 to 4, preferably, the gusset plate 1 includes: the device comprises a preformed groove 2, a connecting end 3 and a plurality of connecting plates 11, wherein first ends of adjacent connecting plates 11 are connected through the connecting end 3; the second end of the connecting plate 11 extends outwards to form an extending end; the extending end of the connecting plate 11 is connected with the side wall of the web plate; the preformed groove 2 is arranged between the adjacent connecting plates 11.
According to the arrangement, the lacing wire can be prevented from being separated from the preformed groove 2 through the connecting end 3 arranged outside the web plate, and the installation reliability is improved.
Preferably, the connection plate 11 is disposed to extend outward perpendicular to the connection end 3. The stress reliability can be improved according to the arrangement.
Preferably, the groove bottom of the preformed groove 2 is arranged on the inner side wall of the connecting end 3; the other end of the preformed groove 2 is an open groove; the open end of the pregroove 2 is disposed towards the web. This arrangement can improve the efficiency of welding and assembling the device.
Preferably, the distance between any two adjacent preformed grooves 2 ranges from 30mm to 70 mm; the size range of the longitudinal section of the preformed groove 2 is 60X 30-100X 70 mm; the range of the distance from the bottom of the preformed groove 2 to the outer side wall of the connecting end 3 is 20-30 mm.
Preferably, the thickness of the gusset plate 1 is in the range of 6 to 14 mm.
Preferably, the section steel column comprises: first section steel post 41, second section steel post 42, third section steel post 43, fourth section steel post 44, first section steel post 41 includes: the first end of the first web plate is connected with the middle part of one side wall of the first end plate; the second end of the first web plate extends outwards perpendicular to the first end plate and is connected with the extending end of the third web plate;
the second type steel column 42 includes: the first end of the second web plate is connected with the middle part of one side wall of the second end plate; the second end of the second web plate extends outwards perpendicular to the second end plate and is connected with the extending end of the fourth web plate;
the third section steel column 43 includes: the first end of the third web plate is connected with the middle part of one side wall of the third end plate; the second end of the third web plate extends outwards perpendicular to the third end plate;
the fourth section steel column 44 includes: the first end of the fourth web plate is connected with the middle part of one side wall of the fourth end plate; the second end of the fourth web extends outwardly perpendicular to the fourth end plate.
The first to fourth section steel columns 44 perpendicular to each other are arranged to form a steel column.
Another aspect of the present application also provides a super high-rise steel reinforced concrete frame-reinforced concrete core tube structure, including: a plurality of column longitudinal bars 6 arranged in a building and the above device arranged in the super high-rise steel reinforced concrete frame-reinforced concrete core tube structure; the column longitudinal ribs 6 are arranged in parallel with the steel columns;
the second end of the post lacing wire is connected with the post longitudinal rib 6.
Preferably, the post lacing wire comprises: the column comprises a first group of column lacing wires 51 and a second group of column lacing wires 5, wherein the first ends of the first group of column lacing wires 51 are connected with the reserved groove 2, and the second ends of the first group of column lacing wires 51 are connected with the column longitudinal ribs 6; the first group of column lacing wires 51 are arranged in parallel with the web plate of the section steel column;
the two ends of the second group of column tie bars 5 are obliquely arranged on any two column longitudinal bars 6, and the projection of the first group of column tie bars 51 on the plane where the second group of column tie bars 5 are located forms an acute angle.
Through setting up first group post lacing wire 51, the net tensile support of effectively forming of second group post lacing wire 5, improve the support effect of this structure to high-rise shaped steel concrete frame.
The device also needs to complete the assembly of each part of the component by welding in the production process, detects the flaw of each main connection stress point to be qualified, finishes the shot blasting and rust removal according to the design specification requirement, and sends the processed product to a construction site for site construction.
A batten plate 11 is arranged on a steel column web, and a preformed groove 22 and a connecting end 33 are arranged on the batten plate 11 during part processing. When the steel member is processed, after the main member is assembled, welded and corrected, a batten plate 11 is arranged at a preset position of a section steel column web according to a deepened design drawing. And (4) finishing the processing of the component, detecting flaw and detecting, sending the qualified flaw and flaw to a construction site after finishing shot blasting and rust removal according to the design specification requirements. After the section steel column and the section steel beam are installed to form a stable system, binding of reinforcing steel bars in the column is carried out, and column lacing wires are connected with the section steel column through reserved grooves 2 formed in the batten plates 1.
Preferably, the batten plate 1 is provided with a column lacing wire preformed groove 2;
preferably, the lacing wire preformed groove 2 of the lacing plate 1 is in a sawtooth shape;
the device is characterized in that a batten plate 11 is arranged on a steel column web, and a preformed groove 22 and a connecting end 33 are arranged on the batten plate 11 during part processing. When the steel member is processed, after the main member is assembled, welded and corrected, a batten plate 11 is arranged at a preset position of a section steel column web according to a deepened design drawing. And finishing the processing of the component, inspecting the quality, and sending the component to a construction site after finishing the shot blasting and rust removal according to the design specification requirements. After the section steel column and the section steel beam are installed to form a stable system, binding of reinforcing steel bars in the column is carried out, and column lacing wires are connected with the section steel column through reserved grooves 2 formed in the batten plates 1. The anchor is simple in structure, convenient to operate, high in practicability, suitable for anchoring of the tie bars of the inner column of the steel reinforced concrete column, simple in manufacturing process, capable of being manufactured quickly and in batches, optimizing the process flow of the hole opening of the web plate of the steel reinforced column, avoiding stress concentration caused by hole opening of the web plate of the steel reinforced column, shortening the processing period of a component, saving component processing and mounting cost, simplifying the construction process of on-site steel bars, greatly improving the construction progress of binding the tie bars of the inner column in construction of the super high-rise steel reinforced concrete frame-reinforced concrete core tube structure, and after adopting the batten plate 1 through finite element simulation analysis, the deformation of the stirrup and the tie bars is smaller, the connection of the batten plate 1 and the tie bars is more stable, the force transferring effect on the steel and the stirrup is better, and the anchoring effect of the tie bars is exerted to the maximum.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the disclosure to effect such feature, structure, or characteristic in connection with other embodiments.
Although the present application has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (9)
1. The utility model provides a high-efficient anchor of superelevation layer shaped steel concrete column lacing wire which characterized in that includes: steel column, a plurality of lacing plate (1), the steel column includes: a plurality of section columns, the section columns comprising: the end plate is connected with the center area of the end plate, and the other end of the web plate of the section steel column extends outwards to form an extending end;
the web plate extending ends of the section steel columns are mutually perpendicular and welded to form the steel columns in a surrounding mode;
the batten plates (1) are symmetrically arranged on two opposite side walls of the web plate in pairs;
the gusset plate (1) includes: the multiple reserved grooves (2), the reserved grooves (2) are longitudinally arranged at intervals along the batten plate (1);
the first end of the column lacing wire is connected with the preformed groove (2).
2. The ultra-high-rise steel reinforced concrete column lacing wire high-efficiency anchoring device according to claim 1, wherein the gusset plate (1) comprises: the connecting device comprises a preformed groove (2), a connecting end (3) and a plurality of connecting plates (11), wherein the first ends of adjacent connecting plates (11) are connected through the connecting end (3);
the second end of the connecting plate (11) extends outwards to form an extending end;
the extending end of the connecting plate (11) is connected with the side wall of the web plate;
the preformed groove (2) is arranged between the adjacent connecting plates (11).
3. The ultra-high-rise steel reinforced concrete column lacing wire high-efficiency anchoring device of claim 2, wherein the connecting plate (11) is arranged to extend outwards from the vertical connecting end (3).
4. The ultra-high-rise steel reinforced concrete column lacing wire high-efficiency anchoring device of claim 2, wherein the groove bottom of the preformed groove (2) is arranged on the inner side wall of the connecting end (3);
the other end of the reserved groove (2) is an open groove;
the open end of the preformed groove (2) is arranged towards the web.
5. The efficient anchoring device for the tie bars of the ultra-high-rise steel reinforced concrete column according to claim 2, wherein the distance between any two adjacent preformed grooves (2) ranges from 30mm to 70 mm;
the longitudinal section size range of the preformed groove (2) is 60X 30-100X 70 mm;
the distance range from the groove bottom of the preformed groove (2) to the outer side wall of the connecting end (3) is 20-30 mm.
6. The ultra-high-rise steel reinforced concrete column lacing wire high-efficiency anchoring device as claimed in claim 1, wherein the thickness of the gusset plate (1) ranges from 6 to 14 mm.
7. The ultra-high-rise section steel concrete column lacing wire high-efficiency anchoring device of claim 1, wherein the section steel column comprises: first shaped steel post (41), second shaped steel post (42), third shaped steel post (43), fourth shaped steel post (44), first shaped steel post (41) includes: the first end of the first web plate is connected with the middle part of one side wall of the first end plate; the second end of the first web plate extends outwards perpendicular to the first end plate and is connected with the extending end of the third web plate;
the second type steel post (42) comprises: the first end of the second web plate is connected with the middle part of one side wall of the second end plate; the second end of the second web plate extends outwards perpendicular to the second end plate and is connected with the extending end of the fourth web plate;
the third section steel column (43) comprises: the first end of the third web plate is connected with the middle part of one side wall of the third end plate; the second end of the third web plate extends outwards perpendicular to the third end plate;
the fourth section steel column (44) comprises: the first end of the fourth web plate is connected with the middle part of one side wall of the fourth end plate; the second end of the fourth web extends outwardly perpendicular to the fourth end plate.
8. A core tube structure comprising the high-efficiency anchoring device for the tie bars of the ultra-high-rise steel reinforced concrete column according to any one of claims 1 to 7, wherein the core tube structure comprises: a plurality of column stringers (6) arranged in a building and the device according to any one of claims 1 to 7, the device according to any one of claims 1 to 7 being arranged in the super high-rise steel concrete frame-reinforced concrete core tube structure;
the column longitudinal ribs (6) are arranged in parallel with the steel columns;
the second end of the column lacing wire is connected with the column longitudinal rib (6).
9. The core barrel construction as claimed in claim 8, wherein the post lacing wire comprises: the column comprises a first group of column lacing wires (51) and a second group of column lacing wires (5), wherein the first ends of the first group of column lacing wires (51) are connected with the preformed groove (2), and the second ends of the first group of column lacing wires (51) are connected with a column longitudinal bar (6);
the first group of column tie bars (51) are arranged in parallel with the web plate of the section steel column;
the two ends of the second group of column tie bars (5) are obliquely arranged on any two column longitudinal bars (6), and the projection of the first group of column tie bars (51) on the plane where the second group of column tie bars (5) are located forms an acute angle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202022791799.4U CN214498082U (en) | 2020-11-26 | 2020-11-26 | High-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202022791799.4U CN214498082U (en) | 2020-11-26 | 2020-11-26 | High-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN214498082U true CN214498082U (en) | 2021-10-26 |
Family
ID=78206533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202022791799.4U Active CN214498082U (en) | 2020-11-26 | 2020-11-26 | High-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN214498082U (en) |
-
2020
- 2020-11-26 CN CN202022791799.4U patent/CN214498082U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8863477B2 (en) | Cold formed stud and method of use | |
US11525272B2 (en) | Anti-seismic performance reinforcement and crack repair structure of masonry structure and construction method of same | |
CN214498082U (en) | High-efficient anchor of superelevation layer shaped steel concrete column lacing wire and core section of thick bamboo structure thereof | |
CN104674986A (en) | Multi-cavity concrete-filled steel tubular wall with internal pre-machined semi-continuous reinforcement cage and construction method | |
KR101274994B1 (en) | Concrete filled double steel tube and concrete filled tubular column | |
CN204676733U (en) | A kind of steel sheet concrete shear force wall | |
CN211058142U (en) | Take novel connection structure's shaped steel concrete frame post | |
CN106436969B (en) | A kind of side intersection of cracking is put more energy into profiled sheet shear wall | |
CN107653985A (en) | A kind of assembled abnormity column connected node and its installation method | |
CN213014819U (en) | Reinforced node of corrugated steel plate wall side column and steel beam | |
CN216921004U (en) | Steel reinforced concrete beam lacing wire fixing device | |
CN217651599U (en) | Connecting device for multi-corner bent steel plate | |
CN112196141A (en) | Bolt rib mixed drawknot steel plate concrete combined shear wall and construction method | |
CN109577520B (en) | Steel pipe concrete key connection shear wall column structure and assembly method | |
CN113293692A (en) | Connecting device and manufacturing method of multi-corner bent steel plate | |
CN213539297U (en) | Truss and floor with same | |
CN106760204B (en) | A kind of beams of concrete improving Torsion bearing capacity | |
CN207003828U (en) | A kind of reinforced column prefabricated component | |
CN209760593U (en) | Connection structure of concrete girder and secondary beam of quick installation | |
CN216007433U (en) | Connecting structure of light partition board and concrete member | |
TWI751952B (en) | Bundle type continuous wall steel cage for resisting vertical earthquake | |
CN117005578B (en) | Steel bar net rack steel plate combined shear wall | |
CN215483650U (en) | H shaped steel bone post and concrete beam indulge muscle connected node structure | |
CN217480621U (en) | Shaped steel post and basic straining beam connection structure | |
CN212154233U (en) | Beam column node reinforced structure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CP01 | Change in the name or title of a patent holder | ||
CP01 | Change in the name or title of a patent holder |
Address after: 730000, No. 660, middle section of Kunlunshan Avenue, Lanzhou New District, Lanzhou City, Gansu Province Patentee after: Gansu science and Industry Construction Group Co.,Ltd. Address before: 730000, No. 660, middle section of Kunlunshan Avenue, Lanzhou New District, Lanzhou City, Gansu Province Patentee before: GANSU JIANTOU STEEL STRUCTURE CO.,LTD. |