CN113970431A - Multichannel contact net spare part fatigue test device - Google Patents
Multichannel contact net spare part fatigue test device Download PDFInfo
- Publication number
- CN113970431A CN113970431A CN202111233470.9A CN202111233470A CN113970431A CN 113970431 A CN113970431 A CN 113970431A CN 202111233470 A CN202111233470 A CN 202111233470A CN 113970431 A CN113970431 A CN 113970431A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- support
- test device
- support structure
- fatigue test
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a multichannel contact net part fatigue test device which comprises a bottom plate, a supporting structure, a top structure, a first test device and a second test device. Wherein the support structure comprises a first support structure, a second support structure and a third support structure; the third supporting structure comprises a cross beam and a plurality of main upright columns, and the tops of at least two main upright columns are fixedly connected through the cross beam; the third support structure is positioned between the first support structure and the second support structure; the top structure is located above the support structure and is simultaneously fixedly connected with the first support structure, the second support structure and the cross beam. Compared with the prior art, the multichannel contact net part fatigue test device provided by the invention has the advantages that a plurality of same and different contact net parts are integrated together for testing, so that the tool is saved, and the installation process is simplified.
Description
Technical Field
The invention relates to the technical field of fatigue tests, in particular to a fatigue test device for parts of a multichannel contact network.
Background
The contact net is erected along an electrified railway, is specially used for providing an electric energy transmission structure for an electric locomotive or a motor train unit, and mainly comprises a contact suspension device, a positioning and supporting device, a support column and a foundation. An electric locomotive or a motor train unit running on the electrified railway is in sliding contact with a contact suspension by a pantograph arranged on the roof of the electric locomotive or the motor train unit, so that the transmission of electric energy from an electric power system to the locomotive is completed, and the locomotive is driven to move forwards.
The fatigue test of contact net spare part is that exert fixed cyclic load on the spare part, then with the cyclic reciprocating test that fixed frequency, wave form etc. developed, to different spare parts, because difference such as size, load size need install and test on different fatigue testing machines, need different frock clamp to connect during the installation, increased frock quantity to area is big.
Disclosure of Invention
The invention aims to provide a multichannel contact net part fatigue test device, which integrates a plurality of same and different contact net parts together for testing, saves tools and simplifies the installation process.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a multichannel contact net part fatigue test device, which comprises:
a base plate;
a support structure comprising a first support structure, a second support structure, and a third support structure; the third supporting structure comprises a cross beam and a plurality of main upright columns, and the tops of at least two main upright columns are fixedly connected through the cross beam; the third support structure is located between the first support structure and the second support structure;
a top structure positioned above the support structure, the top structure being simultaneously fixedly connected to the first support structure, the second support structure and the cross beam;
the first testing device comprises a first actuator, a first connecting cable and two first fixing seats, wherein the two first fixing seats are respectively fixed on the first supporting structure and the second supporting structure, the first actuator is fixed on one of the first fixing seats, the first end of the first connecting cable is fixedly connected with the first actuator, and the second end of the first connecting cable is fixedly connected with the other first fixing seat;
the second testing device comprises a second actuator, a second connection cable and two second fixing seats, the second fixing seats are fixed on the bottom plate and the cross beam respectively, the second actuator is fixed on one of the second fixing seats, the first end of the second connection cable is fixedly connected with the second actuator, and the second end of the second connection cable is fixedly connected with the other second fixing seat.
Preferably, the first support structure comprises a plurality of first side columns, the second support structure comprises a plurality of second side columns, and the tops of the first side columns and the second side columns are fixedly connected with the top structure.
Preferably, the first support structure further comprises a plurality of first diagonal braces, a first end of each first diagonal brace is fixedly connected with the first side upright, and a second end of each first diagonal brace is fixedly connected with the top structure; the second supporting structure further comprises a plurality of second inclined supports, the first ends of the second inclined supports are fixedly connected with the second side upright posts, and the second ends of the second inclined supports are fixedly connected with the top structure.
Preferably, the top structure comprises a pipe network, a supporting plate and a guardrail, the supporting plate and the guardrail are fixed on the pipe network, and the second end of the first inclined support and the second end of the second inclined support are fixedly connected with the pipe network.
Preferably, the support plate is a grid plate.
Preferably, the pipe network comprises a first supporting pipe, a second supporting pipe and an edge pipe, the second supporting pipe and the edge pipe are parallel to each other, the first supporting pipe vertically penetrates through the second supporting pipes, and two ends of the first supporting pipe are fixedly connected with one edge pipe respectively; and the second end of the first inclined support and the second end of the second inclined support are fixedly connected with the second support pipe.
Preferably, the escalator further comprises an escalator, and the upper end of the escalator is fixedly connected with the top structure.
Preferably, the upper surface of bottom plate is equipped with T type groove, is located the below be fixed with the spacing bolt on the second fixing base, the head card of spacing bolt is in the T type groove.
Preferably, the first and second lead lines are both a single lead line.
Preferably, at least one of the first connection thread and the second connection thread is a serial structure, the serial structure includes a tested piece and a plurality of sections of threads, one tested piece is located between two adjacent sections of the threads, and the tested piece is fixedly connected with the adjacent threads.
Compared with the prior art, the invention has the following technical effects:
the multichannel contact net part fatigue test device can integrate a plurality of same and different parts together for testing, and can install a plurality of or a plurality of parts at one time. In the preferred scheme of the invention, the T-shaped groove is arranged on the bottom plate, and the T-shaped groove is matched with the limiting bolt, so that the limiting effect is achieved, the position can be adjusted, frequent disassembly is avoided, and the tool is simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fatigue test device for parts of a multichannel contact network in the embodiment;
FIG. 2 is a schematic structural diagram of FIG. 1 with the first testing device and the second testing device omitted;
FIG. 3 is a schematic view of FIG. 2 from another perspective;
description of reference numerals: 1-a bottom plate; 2-a first side column; 3-main upright post; 4-a second support tube; 5-a first support tube; 6-along the tube; 7-a cross beam; 8-a first diagonal brace; 9-a grid plate; 10-a guardrail; 11-an escalator; 12-a column base; 13-left first fixed seat; 14-a right first fixed seat; 15-a second actuator; 16-upper second fixed seat; 17-lower second fixed seat; 18-a first connecting cable; 19-a second connective cord; 20-first actuator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a multichannel contact net part fatigue test device, which integrates a plurality of same and different contact net parts together for testing, saves tools and simplifies the installation process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3, the embodiment provides a multichannel contact network component fatigue test device, which includes a bottom plate 1, a supporting structure, a top structure, a first testing device and a second testing device.
Wherein the support structure comprises a first support structure, a second support structure and a third support structure. The third supporting structure comprises a cross beam 7 and a plurality of main columns 3, and the tops of at least two main columns 3 are fixedly connected through the cross beam 7. The third support structure is located between the first support structure and the second support structure. The top structure is located above the support structure and is simultaneously fixedly connected to the first support structure, the second support structure and the cross beam 7. The first testing device comprises a first actuator 20, a first connecting cable 18 and two first fixing seats, wherein the two first fixing seats are respectively fixed on a first supporting structure and a second supporting structure, the first actuator 20 is fixed on one of the first fixing seats, a first end of the first connecting cable 18 is fixedly connected with the first actuator 20, and a second end of the first connecting cable 18 is fixedly connected with the other first fixing seat. The second testing device comprises a second actuator 15, a second connection cable 19 and two second fixing seats, the two second fixing seats are respectively fixed on the bottom plate 1 and the cross beam 7, the second actuator 15 is fixed on one of the second fixing seats, a first end of the second connection cable 19 is fixedly connected with the second actuator 15, and a second end of the second connection cable 19 is fixedly connected with the other second fixing seat. In fig. 1, the two first fixing seats are a left first fixing seat 13 and a right first fixing seat 14, respectively, and the two second fixing seats are an upper second fixing seat 16 and a lower second fixing seat 17, respectively.
In actual use, the first connecting cord 18 is preferably oriented horizontally, and the second connecting cord 19 is preferably oriented plumb. The first actuator 20 is preferably bolted to one of the first holders and the second actuator 15 is preferably bolted to one of the second holders. In this embodiment, the two ends of the first connective cord 18 are each secured by a binaural connector, and the two ends of the second connective cord 19 are each secured by a binaural connector. The binaural connector may be mounted on the first holder, the second holder, the first actuator 20 and the second actuator 15. The connection of the first connective cord 18 to the adjacent structure and the connection of the second connective cord 19 to the adjacent structure may be achieved by means of binaural connectors. Since the binaural connector is a common structure in the art, it is not described herein in detail.
The working principle of the multichannel contact net part fatigue test device of this embodiment is as follows: the support structure supports the roof structure in a vertical direction. At the same time, the top structure supports the first and second support structures, preventing the first and second support structures from toppling over during operation of the first actuator 20. After the first actuator 20 is actuated, the first connective cord 18 is loaded, thereby completing a fatigue test of the first connective cord 18; after the second actuator 15 is actuated, the second lead 19 is loaded, thereby completing the fatigue test of the second lead 19. Because this testing arrangement has a plurality of actuators, therefore belongs to multichannel contact net spare part fatigue test device. Space utilization is improved due to the different orientation of the first connective cord 18 and the second connective cord 19. Wherein the second connective cord 19 is mainly used for carrying out fatigue tests for large loads.
The first connective cord 18 and the second connective cord 19 may be a single cord to perform fatigue testing of the single cord. In addition, at least one of the first connecting cord 18 and the second connecting cord 19 may be a series structure. The serial structure comprises a tested piece and a plurality of threads, wherein the tested piece is arranged between two adjacent threads, and the tested piece is fixedly connected with the adjacent threads. The tested pieces on the series structure have consistent test loads, and the fatigue test of a plurality of tested pieces can be completed simultaneously.
In this embodiment, the first supporting structure includes a plurality of first side columns 2, the second supporting structure includes a plurality of second side columns, and the tops of first side columns 2 and second side columns are all fixedly connected with the top structure.
In order to improve the connection strength between the first supporting structure and the top structure and the connection strength between the second supporting structure and the top structure, in this embodiment, the first supporting structure further includes a plurality of first inclined struts 8, and the second supporting structure further includes a plurality of second inclined struts. The first end of first bearing diagonal 8 is fixed continuous with first side stand 2, and the second end of first bearing diagonal 8 is fixed continuous with the top structure, and first bearing diagonal 8, first side stand 2 constitute triangle-shaped stable structure with the top structure. The first end of the second inclined support is fixedly connected with the second side stand column, the second end of the second inclined support is fixedly connected with the top structure, and the second inclined support, the second side stand column and the top structure form a triangular stable structure.
There are many types of roof structures, which can be selected by the person skilled in the art according to the actual needs. In this embodiment, the top structure includes pipe network, backup pad and guardrail 10, and backup pad and guardrail 10 all are fixed in on the pipe network, and the second of first bearing diagonal 8 is held and the second of second bearing diagonal is held all with the pipe network is fixed continuous. The pipe network plays the effect of supporting the skeleton, and the backup pad can shelter from the great hole on the pipe network. The support plate can be used for a user to step on, and the guardrail 10 is used for improving safety and preventing the user from falling due to the lack of feet. The support plate may be a grid 9 or other type of sheet material. The grid plate 9 is provided with small holes, so that materials can be saved, and shoes of a user can be prevented from being trapped.
In this embodiment, the pipe network includes a first support pipe 5, a second support pipe 4, and a border pipe 6. The second support tubes 4 are parallel to the edge tube 6, the first support tube 5 vertically penetrates through the plurality of second support tubes 4, and two ends of the first support tube 5 are fixedly connected with the edge tube 6 respectively. The second end of the first inclined support 8 and the second end of the second inclined support are fixedly connected with the second support pipe 4. According to different actual needs, a person skilled in the art can select other types of pipe networks as long as the pipe networks can play a role of supporting the framework.
In order to facilitate the user to get on the roof structure, the present embodiment further comprises an escalator 11, wherein the upper end of the escalator 11 is fixedly connected with the roof structure, and the lower end of the escalator 11 can be placed on the ground, on the bottom plate 1 or suspended.
Furthermore, in this embodiment, the upper surface of the bottom plate 1 is provided with a T-shaped groove, a limiting bolt is fixed on the second fixing seat located below, and the head of the limiting bolt is clamped in the T-shaped groove. The fact that the head of the limiting bolt is clamped in the T-shaped groove means that the head of the limiting bolt cannot be separated from the T-shaped groove upwards, but can move along the length direction of the T-shaped groove. Therefore, the position of the second fixing seat positioned below can be changed by adjusting the position of the limiting bolt, so that the angle of the second connecting cable 19 can be conveniently adjusted. The connecting structure not only plays a role in limiting, but also can adjust the position, avoid frequent disassembly and simplify the tool.
In this embodiment, the bottoms of the first side column 2, the second side column and the main column 3 are all fixed on the column base 12, and the column base 12 is fixed on the bottom plate 1, so that the first side column 2, the second side column and the main column 3 are fixedly connected with the bottom plate 1.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a multichannel contact net spare part fatigue test device which characterized in that includes:
a base plate;
a support structure comprising a first support structure, a second support structure, and a third support structure; the third supporting structure comprises a cross beam and a plurality of main upright columns, and the tops of at least two main upright columns are fixedly connected through the cross beam; the third support structure is located between the first support structure and the second support structure;
a top structure positioned above the support structure, the top structure being simultaneously fixedly connected to the first support structure, the second support structure and the cross beam;
the first testing device comprises a first actuator, a first connecting cable and two first fixing seats, wherein the two first fixing seats are respectively fixed on the first supporting structure and the second supporting structure, the first actuator is fixed on one of the first fixing seats, the first end of the first connecting cable is fixedly connected with the first actuator, and the second end of the first connecting cable is fixedly connected with the other first fixing seat;
the second testing device comprises a second actuator, a second connection cable and two second fixing seats, the second fixing seats are fixed on the bottom plate and the cross beam respectively, the second actuator is fixed on one of the second fixing seats, the first end of the second connection cable is fixedly connected with the second actuator, and the second end of the second connection cable is fixedly connected with the other second fixing seat.
2. The multichannel contact net part fatigue test device of claim 1, characterized in that, first bearing structure includes a plurality of first side stand columns, second bearing structure includes a plurality of second side stand columns, the top of first side stand column and the top of second side stand column all with top structure fixed connection.
3. The multichannel contact network part fatigue test device as recited in claim 2, wherein the first support structure further comprises a plurality of first diagonal braces, a first end of each first diagonal brace is fixedly connected with the first side column, and a second end of each first diagonal brace is fixedly connected with the top structure; the second supporting structure further comprises a plurality of second inclined supports, the first ends of the second inclined supports are fixedly connected with the second side upright posts, and the second ends of the second inclined supports are fixedly connected with the top structure.
4. The multichannel contact net part fatigue test device of claim 3, characterized in that the top structure includes a pipe network, a support plate and a guardrail, the support plate and the guardrail are both fixed on the pipe network, and the second end of the first diagonal brace and the second end of the second diagonal brace are both fixedly connected with the pipe network.
5. The multichannel contact net part fatigue test device of claim 4, characterized in that, the backup pad is the check board.
6. The fatigue test device for the parts of the multichannel contact net as claimed in claim 4, wherein the pipe network comprises a first support pipe, a second support pipe and an edge pipe, the second support pipe and the edge pipe are parallel to each other, the first support pipe vertically penetrates through the plurality of second support pipes, and two ends of the first support pipe are fixedly connected with one edge pipe respectively; and the second end of the first inclined support and the second end of the second inclined support are fixedly connected with the second support pipe.
7. The multichannel contact net part fatigue test device of claim 1, characterized by further comprising an escalator, wherein the upper end of the escalator is fixedly connected with the top structure.
8. The multichannel contact net part fatigue test device of claim 1, characterized in that the upper surface of the bottom plate is provided with a T-shaped groove, a limiting bolt is fixed on the second fixing seat below the bottom plate, and the head of the limiting bolt is clamped in the T-shaped groove.
9. The multichannel catenary component fatigue test device of claim 1, wherein the first lead and the second lead are both single leads.
10. The multi-channel contact net part fatigue test device as claimed in claim 1, wherein at least one of the first connection thread and the second connection thread is a series structure, the series structure comprises a tested piece and a plurality of sections of threads, one tested piece is arranged between two adjacent sections of the threads, and the tested piece is fixedly connected with the adjacent threads.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111233470.9A CN113970431B (en) | 2021-10-22 | 2021-10-22 | Multichannel contact net spare part fatigue test device |
| ZA2022/02395A ZA202202395B (en) | 2021-10-22 | 2022-02-25 | Multi-channel overhead contact line part fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111233470.9A CN113970431B (en) | 2021-10-22 | 2021-10-22 | Multichannel contact net spare part fatigue test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113970431A true CN113970431A (en) | 2022-01-25 |
| CN113970431B CN113970431B (en) | 2023-02-17 |
Family
ID=79587975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111233470.9A Active CN113970431B (en) | 2021-10-22 | 2021-10-22 | Multichannel contact net spare part fatigue test device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113970431B (en) |
| ZA (1) | ZA202202395B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957290A (en) * | 2010-09-30 | 2011-01-26 | 浙江大学 | Fatigue testing machine applied to tension test piece and method thereof |
| CN203551404U (en) * | 2013-11-21 | 2014-04-16 | 张弘弢 | Planar unidirectional and bidirectional bending fatigue testing machine for steel wire ropes |
| CN203893827U (en) * | 2014-05-31 | 2014-10-22 | 中国铁道科学研究院标准计量研究所 | Cantilever supporting structure flexibility test device based on machine vision |
| CN106680090A (en) * | 2017-01-19 | 2017-05-17 | 中国矿业大学 | Testing device and method for stability bearing capacity of steel angle X-braced panels |
| CN107246993A (en) * | 2017-07-31 | 2017-10-13 | 株洲时代新材料科技股份有限公司 | A kind of mechanical property test device |
| CN109357958A (en) * | 2018-12-11 | 2019-02-19 | 西南交通大学 | A kind of high-speed railway touching net dropper bending fretting fatigue testing device |
| CN109596330A (en) * | 2018-12-17 | 2019-04-09 | 武汉大学 | A kind of multichannel high iron catenary dropper fatigue experimental device |
| CN210603852U (en) * | 2019-09-26 | 2020-05-22 | 长安大学 | Full-assembly type steel structure reaction frame |
| CN211602680U (en) * | 2019-11-14 | 2020-09-29 | 南京林业大学 | Universal loading device for low-cycle repeated load test |
| US20210048380A1 (en) * | 2018-05-04 | 2021-02-18 | China University Of Mining And Technology | Multi-functional support capable of transferring horizontal and multi-point local vertical load and implementation method |
| CN112730066A (en) * | 2020-12-28 | 2021-04-30 | 中国航发沈阳发动机研究所 | Load loading angle adjusting device and method for structural member bearing test |
-
2021
- 2021-10-22 CN CN202111233470.9A patent/CN113970431B/en active Active
-
2022
- 2022-02-25 ZA ZA2022/02395A patent/ZA202202395B/en unknown
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957290A (en) * | 2010-09-30 | 2011-01-26 | 浙江大学 | Fatigue testing machine applied to tension test piece and method thereof |
| CN203551404U (en) * | 2013-11-21 | 2014-04-16 | 张弘弢 | Planar unidirectional and bidirectional bending fatigue testing machine for steel wire ropes |
| CN203893827U (en) * | 2014-05-31 | 2014-10-22 | 中国铁道科学研究院标准计量研究所 | Cantilever supporting structure flexibility test device based on machine vision |
| CN106680090A (en) * | 2017-01-19 | 2017-05-17 | 中国矿业大学 | Testing device and method for stability bearing capacity of steel angle X-braced panels |
| CN107246993A (en) * | 2017-07-31 | 2017-10-13 | 株洲时代新材料科技股份有限公司 | A kind of mechanical property test device |
| US20210048380A1 (en) * | 2018-05-04 | 2021-02-18 | China University Of Mining And Technology | Multi-functional support capable of transferring horizontal and multi-point local vertical load and implementation method |
| CN109357958A (en) * | 2018-12-11 | 2019-02-19 | 西南交通大学 | A kind of high-speed railway touching net dropper bending fretting fatigue testing device |
| CN109596330A (en) * | 2018-12-17 | 2019-04-09 | 武汉大学 | A kind of multichannel high iron catenary dropper fatigue experimental device |
| CN210603852U (en) * | 2019-09-26 | 2020-05-22 | 长安大学 | Full-assembly type steel structure reaction frame |
| CN211602680U (en) * | 2019-11-14 | 2020-09-29 | 南京林业大学 | Universal loading device for low-cycle repeated load test |
| CN112730066A (en) * | 2020-12-28 | 2021-04-30 | 中国航发沈阳发动机研究所 | Load loading angle adjusting device and method for structural member bearing test |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202202395B (en) | 2022-04-28 |
| CN113970431B (en) | 2023-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110011598B (en) | Prestressed double-layer suspension cable photovoltaic bracket | |
| CN113970431B (en) | Multichannel contact net spare part fatigue test device | |
| CN215734096U (en) | Novel photovoltaic module flexible support | |
| CN201924284U (en) | Screw rod seat pipe double-split Bailey bracket | |
| CN209570463U (en) | Self-balancing type exempts from aperture static test bed and its mounting structure | |
| CN217883275U (en) | Large-span prestressed cable truss photovoltaic support system | |
| CN218823623U (en) | Performance test platform of flexible support | |
| CN107447863B (en) | Cantilever structure for steel structure factory building | |
| CN110748001A (en) | Steel structure net rack | |
| CN102832277B (en) | Support and support group of solar cell panel | |
| CN112683668B (en) | Static load test device for communication support | |
| CN203838566U (en) | Photovoltaic tracker foldable support | |
| CN209046168U (en) | A kind of high-tension cable console mode steel framed bent | |
| CN203373661U (en) | Movable operation platform device below cantilever arm of steel-structure bridge | |
| CN204000632U (en) | A kind of sandbox prepressing device based on reaction frame | |
| CN203798665U (en) | Side-direction instability prevention device for steel-frame structure test | |
| CN212477454U (en) | Connecting device for main structure and temporary structure of bridge | |
| CN219068122U (en) | Photovoltaic bracket for communication tower base station | |
| CN218674195U (en) | Monorail turnout multichannel fatigue test bed | |
| CN211651994U (en) | Magnetic suspension train rail coupling vibration test supporting table | |
| CN216490311U (en) | Double-vertical-row flexible photovoltaic support | |
| CN216216643U (en) | Photovoltaic module flexible installation device | |
| CN214153518U (en) | Connecting structure of beam and upright column for power distribution cabinet | |
| CN220754706U (en) | Photovoltaic tracking support and photovoltaic system | |
| CN218330637U (en) | Simulation test bench for pipe piece crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |