CN114991524B - Reinforcing structure for building earthquake resistance - Google Patents
Reinforcing structure for building earthquake resistance Download PDFInfo
- Publication number
- CN114991524B CN114991524B CN202210799777.3A CN202210799777A CN114991524B CN 114991524 B CN114991524 B CN 114991524B CN 202210799777 A CN202210799777 A CN 202210799777A CN 114991524 B CN114991524 B CN 114991524B
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- bevel gear
- rods
- control mechanism
- screw
- groove
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Links
- 230000003014 reinforcing effect Effects 0.000 title abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
A reinforced structure for building antidetonation, including two risers, the recess is seted up on the top of riser, the recess fit is equipped with the roof, the first connecting rod of rear end bottom fixed connection of riser, the relative end of two first connecting rods is fixed connection second connecting rod respectively, the cooperation is equipped with the connecting plate between two second connecting rods, the through groove is seted up to one side of connecting plate, the through groove fit is equipped with first control mechanism, set up first standing groove in the first connecting rod, set up the second standing groove in the second connecting rod, the second standing groove fit is equipped with the spring telescopic link, the through groove fit is equipped with second control mechanism, the two spring telescopic links of second control mechanism control rotate. In the process of temporarily supporting and reinforcing the building, the length and the height of the upright post in the building are adjusted according to the different upright post sizes, so that the temporary reinforcing and supporting requirements of different types of buildings are met, the operation is simple, and the reinforcing operation time is short.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a reinforced structure for building earthquake resistance.
Background
The building refers to an asset formed by artificial building, belongs to the category of fixed assets, and comprises two major categories of houses and constructions, wherein the houses refer to engineering buildings for people to live, work, study, production, operation, entertainment, store articles and perform other social activities, and the constructions are different from the buildings, and the constructions refer to engineering buildings outside the houses, such as enclosing walls, roads, dams, wells, tunnels, water towers, bridges, chimneys and the like; at present, the building is temporarily reinforced, vertical steel pipe supports are basically adopted, but the building heights are different, the steel pipe supports with different heights are needed, the carrying is inconvenient, a steel pipe which can be the same as the building height cannot be completely found, a supporting block is needed to be added at the bottom of the steel pipe, and the operation is complicated.
Disclosure of Invention
The invention provides a reinforced structure for building earthquake resistance, which is used for solving the defects in the prior art.
The invention is realized by the following technical scheme:
a reinforcing structure for building earthquake resistance comprises two vertical plates, wherein the top ends of the vertical plates are provided with grooves, top plates are matched with the grooves, screw rods are movably arranged on the inner walls of the bottom ends of the grooves, screw holes are arranged at the bottom ends of the top plates, the screw rods are inserted into the screw holes and are matched with the screw holes in a threaded manner, the bottoms of the rear ends of the vertical plates are fixedly connected with first connecting rods, the opposite ends of the two first connecting rods are respectively fixedly connected with second connecting rods, connecting plates are matched with each other, one side of each connecting plate is provided with a through groove, the opposite ends of the two second connecting rods are respectively inserted into the through grooves, screw holes are respectively arranged at the front ends of the opposite ends of the two second connecting rods in a threaded manner, the screw holes are fixedly connected with each other in a threaded manner, a first control mechanism is arranged in the through grooves in a matched manner to control the two screw rods to rotate, a first placing groove is formed in the first connecting rods, the inner wall of the rear end of the first placing groove is movably provided with a connecting shaft, the front end of the connecting shaft passes through a groove, the front end of the connecting shaft is fixedly provided with a first bevel gear, the rear end of the connecting shaft is fixedly provided with a second bevel gear, the bottom end of the screw rod is fixedly provided with a third bevel gear, the first bevel gear is meshed and matched with the third bevel gear, a second placing groove is arranged in the second connecting rod, the front end and the rear end of the middle part of the penetrating groove are respectively fixedly provided with a supporting rod, the two supporting rods are connected through a ball bearing, the second placing groove is internally matched with a spring telescopic rod, the opposite ends of the two spring telescopic rods are fixedly connected, the connecting part of the two spring telescopic rods is connected with the inner wall of an inner ring of the ball bearing, the opposite ends of the two spring telescopic rods are respectively fixedly provided with a fourth bevel gear, the fourth bevel gear is meshed and matched with the corresponding second bevel gear, the penetrating groove is internally matched with a second control mechanism, the second control mechanism controls the two spring telescopic rods to rotate.
The first control mechanism comprises a fifth bevel gear, the fifth bevel gear is arranged on one screw rod, a first through hole is formed in the rear end of the connecting plate, a first rotating shaft is arranged in the first through hole through a bearing, the first rotating shaft is located above the spring telescopic rod, a sixth bevel gear is fixedly arranged at the front end of the first rotating shaft, and the sixth bevel gear is meshed with the fifth bevel gear.
The second control mechanism comprises a seventh bevel gear, the seventh bevel gear is arranged on one spring telescopic rod, a second through hole is formed in the rear end of the connecting plate, a second rotating shaft is arranged in a bearing in the second through hole, an eighth bevel gear is fixedly arranged at the front end of the second rotating shaft, and the eighth bevel gear is meshed with the seventh bevel gear.
According to the reinforced structure for building earthquake resistance, the telescopic rods are fixedly installed at the bottom of the front end of the vertical plate and the top of the front end of the top plate, the front ends of the two telescopic rods located in the same vertical center are connected through the telescopic plates, the U-shaped block is fixedly installed at the front end of the fixed plate of one telescopic plate, the electromagnet is fixedly installed in the groove of the U-shaped block, the long iron block is rotatably installed at the front end of the fixed plate of the other telescopic plate, and the long iron block can be in adsorption fit with the electromagnet.
The invention has the advantages that: in the temporary supporting and reinforcing process of the building, according to the length and the height of the upright post in the building, firstly, two vertical plates are moved to two sides of the upright post, two screw rods are controlled to rotate through a first control mechanism, two second connecting rods are controlled to move relatively to drive a first connecting rod, the vertical plates and a top plate to move, the vertical plates are contacted with the side surfaces of the jacking posts, then the second control mechanism controls a spring telescopic rod to account for rotation, a fourth bevel gear and a second bevel gear are driven to rotate, the first bevel gear is meshed with a third bevel gear through the connection of a connecting shaft, a screw rod can be driven to rotate, the top plate is controlled to move upwards, the top end of the top plate is contacted with the roof, and at the moment, the vertical plates and the top plate generate supporting force to carry out temporary supporting and reinforcing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention; FIG. 2 is a left side view of FIG. 1; FIG. 3 is a view in the A direction of FIG. 1; fig. 4 is a partial enlarged view of I of fig. 3.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A reinforcing structure for building earthquake resistance is shown in the figure, which comprises two vertical plates 1, the top ends of the vertical plates 1 are provided with grooves, the inner ends of the grooves are matched with top plates 2, screw rods 3 are movably arranged on the inner walls of the bottom ends of the grooves, screw holes are arranged at the bottom ends of the top plates 2, the screw rods are inserted into the screw holes and are in threaded fit with the screw holes, the bottoms of the rear ends of the vertical plates 1 are fixedly connected with first connecting rods 4, the opposite ends of the two first connecting rods 4 are respectively fixedly connected with second connecting rods 5, connecting plates 6 are arranged between the two second connecting rods 5 in a matched manner, one side of each connecting plate 6 is provided with a through groove 7, the opposite ends of the two second connecting rods 5 are respectively inserted into the through grooves 7, screw holes are respectively arranged at the front ends of the opposite ends of the two second connecting rods 5 in a threaded manner, screw rods 8 are fixedly connected between the opposite threads of the two screw rods 8, a first control mechanism is arranged in the through grooves 7 in a matched manner, the first control mechanism can stabilize the screw rods, the control screw rod rotates, the first control mechanism controls the two screw rods 8 to rotate, a first placing groove 9 is formed in the first connecting rod 4, a connecting shaft 10 is movably arranged on the inner wall of the rear end of the first placing groove 9, the front end of the connecting shaft penetrates through a groove, a first bevel gear 11 is fixedly arranged at the front end of the connecting shaft 10, a second bevel gear 12 is fixedly arranged at the rear end of the connecting shaft 10, a third bevel gear 13 is fixedly arranged at the bottom end of the screw rod 3, the first bevel gear 11 is meshed and matched with the third bevel gear 13, a second placing groove 14 is formed in the second connecting rod 5, supporting rods 15 are fixedly arranged at the front end and the rear end of the middle of the penetrating groove 7 respectively, the two supporting rods 15 are connected through ball bearings, a spring telescopic rod 16 is fixedly arranged in the second placing groove 14 in a matched manner, the opposite ends of the two spring telescopic rods 16 are fixedly connected, the connecting positions of the two spring telescopic rods 16 are connected with the inner ring inner wall of the ball bearings, the opposite ends of the two spring telescopic rods 16 are respectively and fixedly provided with a fourth bevel gear 17, the fourth bevel gear 17 is meshed and matched with the corresponding second bevel gear 12, a second control mechanism is arranged in the through groove 7 in a matched mode, and the second control mechanism controls the two spring telescopic rods 16 to rotate. In the temporary supporting and reinforcing process of the building, according to the length and the height of the upright post in the building, firstly, two vertical plates 1 are moved to two sides of the upright post, two screw rods are controlled to rotate through a first control mechanism, two second connecting rods are controlled to move relatively, the first connecting rods, the vertical plates 1 and the top plate are driven to move, the vertical plates are contacted with the side surfaces of the top post, then the second control mechanism controls a spring telescopic rod 16 to account for rotation, a fourth bevel gear 17 and a second bevel gear 12 are driven to rotate, the first bevel gear 11 is meshed with a third bevel gear 13 through the connection of a connecting shaft 10, a screw rod 3 can be driven to rotate, the top plate 2 is controlled to move upwards, the top end of the top plate 2 is contacted with the roof, supporting force is generated at the moment, temporary supporting and reinforcing can be carried out according to different upright post sizes, the temporary supporting requirements of different types of the building are met, the operation is simple, and the reinforcing operation time is short.
Specifically, the first control mechanism according to this embodiment includes a fifth bevel gear 18, the fifth bevel gear is mounted on one of the screws, a first through hole is formed in the rear end of the connecting plate 6, a first rotating shaft 19 is mounted in the first through hole in a bearing manner, the first rotating shaft is located above the spring telescopic rod, a sixth bevel gear 20 is fixedly mounted at the front end of the first rotating shaft 19, and the sixth bevel gear 20 is engaged with the fifth bevel gear 18. The connection parts of the two screws are connected through bearings, the inner wall of an inner ring of each bearing is connected with the periphery of each screw, the outer wall of an outer ring of each bearing is connected with the top end of a supporting rod positioned in front of each bearing, the first rotating shaft 19 is rotated to drive the sixth bevel gear and the fifth bevel gear 18 to rotate, the screws are driven to rotate, the threads of the two screws are opposite to each other through the threaded fit of the screws and the screw holes, and the two second connecting rods are controlled to move relatively or move in opposite directions.
Specifically, the second control mechanism according to this embodiment includes a seventh bevel gear 21, the seventh bevel gear is mounted on one of the spring telescopic rods, the rear end of the connecting plate 6 is provided with a second through hole, a second rotating shaft 22 is mounted in the second through hole through a bearing, an eighth bevel gear 23 is fixedly mounted at the front end of the second rotating shaft 22, and the eighth bevel gear 23 is engaged with the seventh bevel gear 21. The second rotating shaft 22 is rotated to drive the seventh bevel gear and the eighth bevel gear to rotate, drive the spring telescopic rod to rotate, drive the fourth bevel gear and the second bevel gear to rotate, drive the screw rod to rotate through sequential transmission, control the top plate to move up and down, enable the top plate to be in contact with the roof, and the vertical plate and the top plate support the house.
Further, in this embodiment, the front end bottom of the riser 1 and the front end top of the top plate are fixedly provided with the telescopic rods 24, the front ends of the two telescopic rods 24 located in the same vertical center are connected through the telescopic plates 25, the front end of the fixed plate of one telescopic plate 25 is fixedly provided with a U-shaped block, the inside of the groove of the U-shaped block is fixedly provided with an electromagnet, the front end of the fixed plate of the other telescopic plate 25 is rotatably provided with a long iron block, and the long iron block can be in adsorption fit with the electromagnet. The front end of the telescopic rod 24 positioned above is connected with the rear end of the movable plate of the telescopic plate 25, the front end of the telescopic rod 24 positioned below is connected with the rear end of the fixed plate of the telescopic plate 25, when the width of the building jacking column is longer, the telescopic rod 24 stretches to push the telescopic plate 25 forward, so that the telescopic plate 25 and the front end of the side part of the building jacking column are positioned in front of the building jacking column, the U-shaped block is positioned in front of the building jacking column, then the strip iron block is rotated, the strip iron block is inserted into the groove of the U-shaped block, the electromagnet is electrified and is in adsorption fit with the strip iron block, the distance between the two telescopic plates 25 is fixed, and the telescopic rod is fixedly supported with the building jacking column.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (1)
1. A reinforced structure for building antidetonation, its characterized in that: including two risers (1), the recess is seted up on the top of riser (1), the recess fit is equipped with roof (2) in the recess, screw hole is seted up to the bottom inner wall movable mounting lead screw (3) of recess, the screw rod inserts to in the screw hole and with screw hole screw-thread fit, the first connecting rod (4) of rear end bottom fixed connection of riser (1), the relative end of two first connecting rods (4) is fixed connection second connecting rod (5) respectively, the cooperation is equipped with connecting plate (6) between two second connecting rods (5), through groove (7) are seted up to one side of connecting plate (6), the screw hole is seted up respectively to the front end of the relative end of two second connecting rods (5), screw hole internal thread fit is equipped with screw rod (8) respectively, fixed connection between the relative ends of two screw rods (8) are opposite, through groove (7) fit is equipped with first control mechanism, first control mechanism controls two screw rods (8) rotation, set up first standing groove (9) in first connecting rod (4), the front end of first standing groove (10) is installed to the front end of first shaft (10), the front end of the installation bevel shaft (10) is installed to the front end of the bevel shaft (10), the bottom end of the screw rod (3) is fixedly provided with a third bevel gear (13), the first bevel gear (11) is meshed with the third bevel gear (13), a second placing groove (14) is formed in the second connecting rod (5), the front end and the rear end of the middle part of the penetrating groove (7) are respectively fixedly provided with a supporting rod (15), the two supporting rods (15) are connected through ball bearings, the second placing groove (14) is internally provided with a spring telescopic rod (16) in a matched manner, the opposite ends of the two spring telescopic rods (16) are fixedly connected, the connecting position of the two spring telescopic rods (16) is connected with the inner ring inner wall of the ball bearings, the opposite ends of the two spring telescopic rods (16) are respectively fixedly provided with a fourth bevel gear (17), the fourth bevel gear (17) is meshed with the corresponding second bevel gear (12), the penetrating groove (7) is internally provided with a second control mechanism in a matched manner, and the second control mechanism controls the two spring telescopic rods (16) to rotate;
the first control mechanism comprises a fifth bevel gear (18), the fifth bevel gear is arranged on one screw rod, a first through hole is formed in the rear end of the connecting plate (6), a first rotating shaft (19) is arranged in the first through hole in a bearing mode, the first rotating shaft is located above the spring telescopic rod, a sixth bevel gear (20) is fixedly arranged at the front end of the first rotating shaft (19), and the sixth bevel gear (20) is meshed and matched with the fifth bevel gear (18);
the second control mechanism comprises a seventh bevel gear (21), the seventh bevel gear is arranged on one of the spring telescopic rods, a second through hole is formed in the rear end of the connecting plate (6), a second rotating shaft (22) is arranged in the second through hole through bearing, an eighth bevel gear (23) is fixedly arranged at the front end of the second rotating shaft (22), and the eighth bevel gear (23) is meshed and matched with the seventh bevel gear (21);
the front end bottom of riser (1), the front end top of roof all fixed mounting telescopic link (24), be located and connect through expansion plate (25) between two telescopic link (24) front ends of same vertical center, the fixed plate front end fixed mounting U type piece of one expansion plate (25), fixed mounting electro-magnet in the recess of U type piece, the fixed plate front end rotation installation rectangular iron plate of another expansion plate (25), rectangular iron plate can adsorb the cooperation with the electro-magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210799777.3A CN114991524B (en) | 2022-07-08 | 2022-07-08 | Reinforcing structure for building earthquake resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210799777.3A CN114991524B (en) | 2022-07-08 | 2022-07-08 | Reinforcing structure for building earthquake resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114991524A CN114991524A (en) | 2022-09-02 |
| CN114991524B true CN114991524B (en) | 2023-08-25 |
Family
ID=83019135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210799777.3A Active CN114991524B (en) | 2022-07-08 | 2022-07-08 | Reinforcing structure for building earthquake resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114991524B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204552141U (en) * | 2015-04-22 | 2015-08-12 | 福州大学 | A kind of braced structures for beam stanchion construction of replacing |
| CN108277999A (en) * | 2018-01-09 | 2018-07-13 | 济宁新宇商标代理有限公司 | The detachable convenient support device of steel structure building template |
| CN210656020U (en) * | 2019-09-09 | 2020-06-02 | 云南天泽建筑工程有限公司 | Reinforced structure of building structure floor panel |
| AU2020101310A4 (en) * | 2020-07-09 | 2020-08-20 | Central South University | Temporary Support Device and Implementation Method |
| CN211775804U (en) * | 2020-03-09 | 2020-10-27 | 马鑫 | Template clamping device for building reinforcement |
| CN112360152A (en) * | 2020-11-23 | 2021-02-12 | 卢安康 | Template anchor clamps based on building engineering construction usefulness |
| CN113106881A (en) * | 2021-05-27 | 2021-07-13 | 中交投资咨询(北京)有限公司 | Steel structure bridge reinforcing device |
| CN214302988U (en) * | 2020-11-12 | 2021-09-28 | 武汉恒升建筑科技开发工程有限公司 | Building structure design roof beam reinforced structure |
| CN216277942U (en) * | 2021-10-22 | 2022-04-12 | 王吉营 | Temporary reinforcing and supporting device for coal mine tunnel in coal mining excavation |
-
2022
- 2022-07-08 CN CN202210799777.3A patent/CN114991524B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204552141U (en) * | 2015-04-22 | 2015-08-12 | 福州大学 | A kind of braced structures for beam stanchion construction of replacing |
| CN108277999A (en) * | 2018-01-09 | 2018-07-13 | 济宁新宇商标代理有限公司 | The detachable convenient support device of steel structure building template |
| CN210656020U (en) * | 2019-09-09 | 2020-06-02 | 云南天泽建筑工程有限公司 | Reinforced structure of building structure floor panel |
| CN211775804U (en) * | 2020-03-09 | 2020-10-27 | 马鑫 | Template clamping device for building reinforcement |
| AU2020101310A4 (en) * | 2020-07-09 | 2020-08-20 | Central South University | Temporary Support Device and Implementation Method |
| CN214302988U (en) * | 2020-11-12 | 2021-09-28 | 武汉恒升建筑科技开发工程有限公司 | Building structure design roof beam reinforced structure |
| CN112360152A (en) * | 2020-11-23 | 2021-02-12 | 卢安康 | Template anchor clamps based on building engineering construction usefulness |
| CN113106881A (en) * | 2021-05-27 | 2021-07-13 | 中交投资咨询(北京)有限公司 | Steel structure bridge reinforcing device |
| CN216277942U (en) * | 2021-10-22 | 2022-04-12 | 王吉营 | Temporary reinforcing and supporting device for coal mine tunnel in coal mining excavation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114991524A (en) | 2022-09-02 |
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