CN219548863U - Development machine main frame and development machine - Google Patents
Development machine main frame and development machine Download PDFInfo
- Publication number
- CN219548863U CN219548863U CN202320629572.0U CN202320629572U CN219548863U CN 219548863 U CN219548863 U CN 219548863U CN 202320629572 U CN202320629572 U CN 202320629572U CN 219548863 U CN219548863 U CN 219548863U
- Authority
- CN
- China
- Prior art keywords
- outer frame
- frame
- plates
- main body
- heading machine
- 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
- 238000011161 development Methods 0.000 title abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Package Frames And Binding Bands (AREA)
- Hydraulic Turbines (AREA)
Abstract
The utility model discloses a main frame of a heading machine and the heading machine. The development machine main frame comprises an outer frame and an inner framework fixed on the inner side of the outer frame, wherein the outer frame comprises a plurality of outer frame annular bodies which are sequentially butted along the axial direction; each outer frame ring body comprises at least two outer frame plates and an outer frame connecting block, wherein the outer frame plates and the outer frame connecting blocks are sequentially arranged along the circumferential direction; the outer frame plate is formed by sequentially connecting outer frame main body blocks along the circumferential direction, the outer frame main body blocks are quadrangular, the section perpendicular to the axial direction is trapezoidal, and the surface corresponding to the waist of the trapezoid is the periphery Xiang Duanmian of the outer frame main body blocks; the cross section of the outer frame connecting block perpendicular to the axial direction is V-shaped; the inner skeleton is formed by splicing at least two inner frame main body blocks. The outer frame is formed by splicing the outer frame main body blocks and the outer frame connecting blocks, the inner frame is formed by splicing the inner frame main body blocks, the whole host frame is integrated into zero, and the inner frame is formed by rapid assembly through sequential connection of small modules, so that the production, manufacture and transportation difficulty and cost can be reduced.
Description
Technical Field
The utility model relates to the technical field of tunneling equipment, in particular to a host frame of a tunneling machine and the tunneling machine.
Background
The special-shaped section heading machine is integrated equipment integrating excavation, stepping, muck transportation and anchor rod spraying, mixing and supporting, and the special-shaped section heading machine is in a regular shape such as a non-circular shape, a non-rectangular shape and the like on the front surface (facing the tunnel section) and can be in a shape formed by elliptic or multi-section curves with different curvatures. For the main frame structure of the special-shaped large-section heading machine, the cross section of the main frame perpendicular to the axial direction is correspondingly special-shaped due to the irregular shape of the cross section, the main frame is generally integrally matched in the manufacturing process of the main frame, the process flow is complex, the manufacturing period is long, the structural dimension is heavy, and the transportation and hoisting cost is high.
Therefore, how to reduce the processing difficulty of the mainframe is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
Accordingly, the present utility model is directed to a main frame of a heading machine and a heading machine comprising the main frame of the heading machine, which has low processing difficulty.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the main frame of the heading machine comprises an outer frame and an inner framework fixed on the inner side of the outer frame, wherein the outer frame comprises a plurality of outer frame annular bodies which are sequentially butted along the axial direction; each outer frame annular body comprises at least two outer frame plates and an outer frame connecting block, wherein the outer frame plates and the outer frame connecting blocks are sequentially arranged along the circumferential direction; the outer frame plate is formed by sequentially connecting outer frame main body blocks along the circumferential direction, the outer frame main body blocks are quadrangular, the section perpendicular to the axial direction is trapezoidal, and the surface corresponding to the waist of the trapezoid is the periphery Xiang Duanmian of the outer frame main body blocks; the cross section of the outer frame connecting block perpendicular to the axial direction is V-shaped; the inner framework is formed by splicing at least two inner frame main body blocks.
Preferably, in each of the outer frame plates, an outer frame leg is fixedly provided on a radial end face of at least one of the outer frame main body blocks, and the inner frame is connected to the outer frame leg.
Preferably, each of the outer frame plates is bolted to the outer frame body block, and the outer frame connecting block is bolted to the adjacent outer frame plate.
Preferably, the internal skeleton is a grid-like structure.
Preferably, each inner frame main body block is sequentially connected through bolts to form the inner frame.
Preferably, the outer frame comprises at least two outer frame annular bodies which are sequentially connected through bolts along the axial direction.
Preferably, the outer frame ring body comprises four outer frame plates, wherein two opposite outer frame plates are plane plates, and the other two opposite outer frame plates are arc plates.
Preferably, the outer frame ring body comprises four outer frame plates, and the outer frame plates are all plane plates.
A heading machine comprising a heading machine host frame as claimed in any one of the preceding claims.
The utility model provides a main frame of a development machine, which comprises an outer frame and an inner framework fixed on the inner side of the outer frame, wherein the outer frame comprises a plurality of outer frame annular bodies which are sequentially butted along the axial direction; each outer frame ring body comprises at least two outer frame plates and an outer frame connecting block, wherein the outer frame plates and the outer frame connecting blocks are sequentially arranged along the circumferential direction; the outer frame plate is formed by sequentially connecting outer frame main body blocks along the circumferential direction, the outer frame main body blocks are quadrangular, the section perpendicular to the axial direction is trapezoidal, and the surface corresponding to the waist of the trapezoid is the periphery Xiang Duanmian of the outer frame main body blocks; the cross section of the outer frame connecting block perpendicular to the axial direction is V-shaped; the inner skeleton is formed by splicing at least two inner frame main body blocks.
The outer frame is formed by splicing the outer frame main body blocks and the outer frame connecting blocks, the inner frame is formed by splicing the inner frame main body blocks, the whole host frame is integrated into zero, and the inner frame is formed by rapid assembly through sequential connection of small modules, so that the production, manufacture and transportation difficulty and cost can be reduced.
The tunneling machine provided by the utility model has low processing difficulty of the host frame.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is an axial view of a host frame of a heading machine provided by the present utility model;
FIG. 2 is a cross-sectional view perpendicular to the axial direction of a host frame of the heading machine provided by the present utility model;
FIG. 3 is an exploded view of a host frame of the heading machine provided by the present utility model;
FIG. 4 is a schematic diagram of the installation of an outer frame body block of a host machine of the heading machine provided by the utility model;
FIG. 5 is a schematic diagram illustrating the installation of the internal framework of the host machine of the heading machine provided by the utility model.
Reference numerals:
the outer frame 1, an outer frame annular body 11, an outer frame plate 12, an outer frame main body block 121, outer frame support legs 122 and an outer frame connecting block 13;
an inner frame 2, an inner frame body block 21.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a main frame of a heading machine and the heading machine comprising the main frame of the heading machine, and the main frame has lower processing difficulty.
It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
In one embodiment of the host frame of the heading machine provided by the utility model, please refer to fig. 1, which includes an outer frame 1 and an inner skeleton 2 fixedly connected in the outer frame 1. The outer frame 1 and the inner skeleton 2 are specifically steel structures.
The outer frame 1 comprises a plurality of outer frame annular bodies 11 which are sequentially butted along the axial direction. Alternatively, according to the length requirement of the outer frame 1 in the axial direction, only one outer frame annular body 11 may be provided in the axial direction, or the outer frame 1 includes at least two outer frame annular bodies 11 sequentially bolted in the axial direction, and in addition, the single outer frame annular bodies 11 are prevented from being too long to be convenient to transport or process by axial splicing.
Each outer frame ring 11 includes at least two outer frame plates 12 arranged in sequence in the circumferential direction and an outer frame connection block 13 that abuts against the adjacent two outer frame plates 12. As shown in fig. 2, each outer frame ring body 11 includes four outer frame plates 12 sequentially arranged in the circumferential direction, respectively corresponding to the four faces of the outer frame 1, and each outer frame connecting block 13 is provided at each vertex angle, so that the outer frame plates 12 are connected through the outer frame connecting blocks 13 to form a closed ring body. Of course, in other embodiments, the outer grill plates 12 may be provided in three, five, or other numbers as desired.
Each outer frame plate 12 is formed by connecting outer frame body blocks 121 in sequence in the circumferential direction. The overall frame body block 121 has a slightly wedge-shaped cubic steel structure. Specifically, the outer frame body block 121 is a quadrangular prism, and the cross section perpendicular to the axial direction is a trapezoid, the surface corresponding to the waist of the trapezoid is the circumferential end surface of the outer frame body block 121, the circumferential end surface is finished, and the outer frame body block 121 is connected with the circumferentially adjacent outer frame body block 121 or outer frame connecting block 13 through the circumferential end surface thereof. In addition, a set of parallel surfaces of the six surfaces of the outer frame main body block 121 is finished as axial end faces to abut against the other outer frame annular body 11 in the axial direction.
Wherein, since the two circumferential end surfaces of the outer frame body block 121 are symmetrical surfaces having a certain included angle, the arc-shaped outer frame plate 12 or the planar outer frame plate 12 can be manufactured by adjusting the installation direction of the outer frame body block 121.
As shown in fig. 2, the upper and lower outer frame plates 12 are arc plates, and the outer frame plates 12 are formed by butt-jointing the outer frame body blocks 121 in a same direction, and the same direction arrangement refers to that the trapezoid bottoms in the cross section of each outer frame body block 121 perpendicular to the axial direction in the outer frame plates 12 are all corresponding to radial outer end surfaces or all corresponding to radial inner end surfaces. The relationship of the included angles between the two circumferential end surfaces in the outer frame body block 121 may be set according to the curvature requirement of the curved surface of the main frame. As shown in fig. 2, the left and right outer frame plates 12 are planar plates, and the outer frame plates 12 are formed by alternately butt-jointing the outer frame body blocks 121 in the forward and reverse directions, that is, in the outer frame plates 12, the trapezoid bottoms in the cross section of the outer frame body blocks 121 perpendicular to the axial direction are corresponding to radial outer end surfaces, and the trapezoid bottoms in the cross section of the adjacent outer frame body blocks 121 perpendicular to the axial direction are corresponding to radial inner end surfaces, so that the planar plate surfaces in the outer frame 1 are fitted. Obviously, by setting the positive and negative butting relation, the outer frame plate 12 with any other shape can be fitted. Of the two radial end surfaces of the outer frame body block 121 and the outer frame connection block 13, the radial inner end surface is used to form the inner peripheral surface of the outer frame 1, and the radial outer end surface is used to form the outer peripheral surface of the outer frame 1.
The cross section of the outer frame connecting block 13 perpendicular to the axial direction is V-shaped to enable transitional connection between different outer frame plates 12. The angle of the V-shape of the cross section perpendicular to the axial direction in the outer frame connection block 13 may be arbitrarily set as required. The outer frame connecting block 13 is a steel structure unit specially constructed for local special shapes and irregular multi-interface parts of the host, and can be assembled and welded during the whole assembly of the host, and temporary material configuration is carried out according to the specific state of the host.
The inner skeleton 2 is formed by splicing at least two inner skeleton main body blocks 21, and is connected with the outer frame 1 to form a main frame of the heading machine. Specifically, the internal framework 2 is of a grid structure, and the hollow structure is arranged, so that the weight of the internal framework 2 can be reduced while the supporting strength is ensured. The inner frame body block 21 may be provided in a cubic shape as needed.
In this embodiment, the outer frame 1 is formed by splicing the outer frame main body block 121 and the outer frame connecting block 13, the inner frame 2 is formed by splicing the inner frame main body block 21, the whole host frame is integrated into zero, and the inner frame is formed by rapid assembly of small modules through sequential connection, so that the production, manufacture and transportation difficulty and cost can be reduced.
Further, in each of the outer frame plates 12, outer frame legs 122 are fixedly provided on the radial end face of at least one outer frame body block 121, and the inner frame 2 is connected to the outer frame legs 122. Referring to fig. 3, four outer frame body blocks 121 are provided on each of the upper and lower outer frame plates 12, and outer frame legs 122 are provided on each of the left and right outer frame plates 12 on each of the outer frame body blocks 121. By providing the outer frame legs 122, the butt joint between the inner frame 2 and the outer frame 1 can be facilitated.
The outer frame body block 121 without the outer frame legs 122 can be directly a standard member of a quadrangular prism body, and the standard member is specifically manufactured through procedures such as welding, stress relief and finish machining, and the outer frame body blocks 121 with the same size have complete interchangeability. The outer frame main body block 121 provided with the outer frame support legs 122 can be directly formed by on-site limited reconstruction on the basis of the standard components, which is equivalent to the special outer frame main body block 121, and can improve the production efficiency and the production flexibility of assembly and manufacture.
Further, in the outer frame plate 12, the outer frame body blocks 121 are bolted. The outer frame connection blocks 13 are bolted to adjacent outer frame plates 12. The inner frame body blocks 21 are sequentially connected by bolts to form the inner frame 2. Through bolted connection for single block can be changed, the maintenance of host computer frame of being convenient for.
Specifically, the flange surface is machined on the axial end surface and the circumferential end surface of the outer frame main body block 121, the axial end surface and the circumferential end surface of the outer frame connecting block 13, and the surface with the largest distance between the two opposite surfaces of the inner frame main body block 21, and the flange surface is specifically provided with a positioning hole and a fastener mounting hole, so that the hole site design can ensure that similar blocks can be abutted in multiple directions. In addition, in the process of bolting, the flange surfaces of two blocks which are butted are mutually attached, and the two blocks are positioned by a positioning pin and are connected and pre-tightened by a fastener.
Of course, in other embodiments, the above bolted connections may be replaced with welded connections.
The development machine host frame provided by the embodiment adopts the mixed steel structure unit, is integrated into zero, and utilizes the generalized structure to form the host frame, so that the production, manufacture and transportation difficulty and cost are reduced. In the external frame 1, a large number of general and not-various external frame main body blocks 121 are bolted to the main body, and a small number of local interface areas are butted with the external frame main body blocks 121 by adopting external frame connecting blocks 13, so that interchangeability is improved, assembly difficulty is reduced, and quick manufacture and assembly of a special-shaped development machine main body are realized. The outer frame main body blocks 121 of the same type have multiple direction butt joint capability, and are simple in structure and flexible to install. Part of the outer frame body blocks 121 can be directly modified in low strength on the basis of the quadrangular prism type standard components to form special outer frame body blocks 121 capable of being directly connected with the inner frame 2, and the operation is simple. The outline dimensions of the steel structure units such as the outer frame main body blocks 121, the outer frame connecting blocks 13, the inner frame main body blocks 21 and the like are smaller, the transportation manufacturing difficulty is lower, the mass production can be realized, and the production efficiency is improved.
It is obvious that in other embodiments, the shape of the outer frame plate 12 in the outer frame ring 11 is not limited to the shape provided in the above-described embodiments, for example, in another embodiment, the outer frame ring 11 includes four outer frame plates 12, and the outer frame plates 12 are each flat plates.
Besides the main frame of the heading machine, the utility model also provides the heading machine, in particular to a special-shaped large-section heading machine. The development machine comprises a development machine main machine frame, and particularly the development machine main machine frame provided in any embodiment, wherein the main machine frame forms a peripheral support ring, so that the internal structure of the development machine can be protected and supported, and the development machine can correspondingly refer to the above embodiments. The structure of other parts of the heading machine is referred to the prior art, and will not be described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The development machine and the development machine host frame provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (9)
1. The main frame of the heading machine is characterized by comprising an outer frame (1) and an inner framework (2) fixed on the inner side of the outer frame (1), wherein the outer frame (1) comprises a plurality of outer frame annular bodies (11) which are sequentially butted along the axial direction; each outer frame annular body (11) comprises at least two outer frame plates (12) which are sequentially arranged along the circumferential direction and an outer frame connecting block (13) for butting two adjacent outer frame plates (12); the outer frame plate (12) is formed by sequentially connecting outer frame main body blocks (121) along the circumferential direction, the outer frame main body blocks (121) are quadrangular, the section perpendicular to the axial direction is trapezoidal, and the surface corresponding to the waist of the trapezoid is the circumferential end surface of the outer frame main body blocks (121); the cross section of the outer frame connecting block (13) perpendicular to the axial direction is V-shaped; the inner framework (2) is formed by splicing at least two inner frame main body blocks (21).
2. A heading machine main frame as claimed in claim 1, wherein in each of said outer frame plates (12), an outer frame leg (122) is fixedly provided on a radial end face of at least one of said outer frame body blocks (121), said inner skeleton (2) being connected to said outer frame leg (122).
3. A heading machine host frame as claimed in claim 2, wherein each of the outer frame body blocks (121) in the outer frame plates (12) are bolted, and the outer frame connection blocks (13) are bolted to adjacent outer frame plates (12).
4. A heading machine host frame as claimed in claim 2 or 3, characterised in that the internal skeleton (2) is a grid-like structure.
5. A heading machine host frame as claimed in claim 4, wherein each of the inner frame body blocks (21) is connected in turn by bolts to form the inner skeleton (2).
6. A heading machine mainframe as claimed in claim 4, characterised in that the outer frame (1) comprises at least two of the outer frame rings (11) bolted sequentially in axial direction.
7. A heading machine host frame as claimed in claim 1, wherein the outer frame ring (11) comprises four of the outer frame plates (12), two of the opposing outer frame plates (12) being planar plates and the other two of the opposing outer frame plates (12) being arcuate plates.
8. A heading machine host frame as claimed in claim 1, characterised in that the outer frame ring (11) comprises four of the outer frame plates (12), and that the outer frame plates (12) are each planar plates.
9. A heading machine comprising a heading machine host frame as claimed in any one of claims 1 to 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202320629572.0U CN219548863U (en) | 2023-03-27 | 2023-03-27 | Development machine main frame and development machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202320629572.0U CN219548863U (en) | 2023-03-27 | 2023-03-27 | Development machine main frame and development machine |
Publications (1)
Publication Number | Publication Date |
---|---|
CN219548863U true CN219548863U (en) | 2023-08-18 |
Family
ID=87703312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202320629572.0U Active CN219548863U (en) | 2023-03-27 | 2023-03-27 | Development machine main frame and development machine |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN219548863U (en) |
-
2023
- 2023-03-27 CN CN202320629572.0U patent/CN219548863U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2018152956A1 (en) | Assembled-type round steel pipe casing fiber-reinforced concrete column connecting node and mounting method | |
CN219548863U (en) | Development machine main frame and development machine | |
CN107178378B (en) | Segment assembly structure for constructing subway station by using tri-circular shield structure and construction method | |
CN113998323A (en) | Outer cylinder structure, inner support mounting device thereof and manufacturing process method | |
CN108857254B (en) | Jig frame for manufacturing ship flow guide pipe | |
CN210855060U (en) | Tower crane base easy to disassemble and assemble | |
CN216689424U (en) | Node connection structure | |
CN221682107U (en) | Green building switching structure | |
CN220953445U (en) | Anti-drop device for shallow foundation pit supporting plate | |
CN212506789U (en) | Assembled building element based on BIM | |
CN114619205B (en) | Manufacturing method of large steel structure with multiple flange connections | |
CN220976226U (en) | Driving hydraulic head lifting equipment for dismounting and mounting bolts outside high-pressure cylinder | |
CN216839873U (en) | Assembling structure of arc-shaped steel structure support frame peripheral steel structure | |
CN216939185U (en) | Assembling tool for flanges between steel pipe concrete arch bridge sections | |
CN221255218U (en) | Truss unit for bridge inspection vehicle | |
CN221664021U (en) | Building steel construction building ridge | |
CN220319563U (en) | Modular ultra-large diameter shield tunneling machine cutterhead | |
CN211396266U (en) | Bearing beam | |
CN220362198U (en) | High-precision butt joint device of steel casing | |
CN213775946U (en) | High-strength stainless steel pipe structure | |
CN114193355B (en) | Ladder support and missile engine test bed | |
CN110541511B (en) | Space chord support steel-concrete combined floor system | |
CN220185116U (en) | Large-diameter cutter disc blocking structure of shield tunneling machine | |
CN111997182B (en) | Irregular angle steel based on regular tetrahedron assembly type space structure unit | |
CN221589945U (en) | Steel construction beam column node structure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |