CN114837113A - Deformable multifunctional road guardrail - Google Patents
Deformable multifunctional road guardrail Download PDFInfo
- Publication number
- CN114837113A CN114837113A CN202210492370.6A CN202210492370A CN114837113A CN 114837113 A CN114837113 A CN 114837113A CN 202210492370 A CN202210492370 A CN 202210492370A CN 114837113 A CN114837113 A CN 114837113A
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- Prior art keywords
- guardrail
- post
- column
- wall
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- 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.)
- Pending
Links
- 230000004888 barrier function Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 241000282326 Felis catus Species 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/1413—Post-and-rail fences, e.g. without vertical cross-members
- E04H17/1417—Post-and-rail fences, e.g. without vertical cross-members with vertical cross-members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/1413—Post-and-rail fences, e.g. without vertical cross-members
- E04H17/1447—Details of connections between rails and posts
- E04H17/1448—Adjustable, angled or hinged connections
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
- E04H17/22—Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses a deformable multifunctional road guardrail, which comprises a deformable road guardrail, the deformable road guardrail is provided with a guardrail post A, the inner wall of the guardrail post A close to two ends and the center is provided with balls, the linking post at the bottom end of the guardrail post A is installed with a fixed base in a matching way, fixed pins are arranged among the guardrail post A, the linking post and the fixed base, two ends of the linking post are in the shape of circular arcs, the outer walls of connecting shafts symmetrically arranged on the side walls of two sides of the linking post close to the two ends are provided with bearing rings, the guardrail post A is internally provided with a telescopic guardrail rod, the outer walls of the telescopic guardrail rod are provided with ball limiting grooves at equal angles, the top end of the telescopic guardrail rod is provided with a post top connector, the post top connector is provided with a handrail rod, this deformable road guardrail not only has the effect of protection, can also buckle the guardrail simultaneously and become the rescue cat ladder at river bank, long embankment edge, has improved the effect of guardrail greatly.
Description
Technical Field
The invention relates to the technical field of multifunctional road guardrails, in particular to a deformable multifunctional road guardrail.
Background
The existing highway anti-collision guardrail is mostly a corrugated guardrail, is a continuous structure which is mutually spliced by corrugated steel guardrail plates and supported by a main column, and is generally formed by processing galvanized steel plates.
At present, a lot of long dikes and ancient bridges in parks are all provided with road guardrails, the existing guardrails cannot be detached after being installed, and the guardrail has simple and single functions.
Disclosure of Invention
The invention aims to provide a deformable multifunctional road guardrail which is provided with a guardrail column A on a deformable road guardrail, wherein balls are arranged on the inner wall of the guardrail column A close to two ends and in the center of the guardrail column A, a connecting column at the bottom end of the guardrail column A is matched with a fixed base, fixed pins are arranged among the guardrail column A, the connecting column and the fixed base, two ends of the connecting column are in an arc shape, bearing rings are arranged on the outer walls of connecting shafts symmetrically arranged on the side walls of two sides of the connecting column close to the two ends, a telescopic guardrail rod is arranged inside the guardrail column A, ball limit grooves are formed in the outer walls of the telescopic guardrail rod at equal angles, a column top connector is arranged at the top end of the telescopic guardrail rod, and a handrail rod is arranged on the column top connector, so that the guardrail can be bent into a rescue ladder stand at the edge and the edge of a long dike, the effect of the guardrail is greatly improved, and the problem brought forward in the background technology is solved.
In order to achieve the purpose, the invention provides the following technical scheme: a deformable multifunctional road guardrail comprises a deformable road guardrail, wherein a guardrail column A is arranged on the deformable road guardrail, a connecting column is arranged at the bottom end of the guardrail column A, a fixed base is arranged at the bottom end of the connecting column, and the guardrail column A, the connecting column and the fixed base are movably connected;
guardrail post A's inside is equipped with flexible guardrail post, and the latter half setting of flexible guardrail post is in guardrail post A's inside, the top of flexible guardrail post is equipped with the capital connector, capital connector and flexible guardrail post structure as an organic whole, top one side of capital connector is equipped with the bar, adopts screw fixed connection between bar and the capital connector.
Preferably, connecting lugs are symmetrically arranged at the bottom end of the guardrail column A close to the edges of the two sides, connecting shaft mounting holes are formed in the connecting lugs, limiting pin mounting grooves are formed in the side wall of the outer side of the guardrail column A close to the bottom end, the limiting pin mounting grooves are welded with the outer wall of the guardrail column A, limiting pin mounting holes are formed in the limiting pin mounting grooves in the vertical direction, and the limiting pin mounting holes penetrate through the limiting pin mounting grooves in the vertical direction;
the guardrail comprises a guardrail column A and is characterized in that balls are symmetrically arranged in the center and at two ends of the inner wall of the guardrail column A, the balls and the guardrail column A are movably mounted, and a telescopic guardrail column inlet and outlet is formed in the top end of the guardrail column A.
Preferably, the both ends end of linking up the post is circular-arc, links up the post and is equipped with the linking axle by the bilateral symmetry of near end, links up the axle and links up the post structure as an organic whole, links up the outer wall of axle and is equipped with the race ring, the outer wall that links up the post is close to the bottom and is equipped with the spacer pin mounting groove.
Preferably, the angle of the turn of the coupling post in the vertical direction ranges from 0 to 270 °.
Preferably, the bottom of fixed baseplate is equipped with fixed baseplate, and fixed baseplate's central authorities are equipped with and link up the post, and the equal angular symmetry of the outer wall that links up the post is equipped with the angle steel of enhancement, strengthens angle steel and fixed baseplate, links up post outer wall welded connection, fixed baseplate's inside is equipped with the fixed pin and links up the hole, and the fixed pin links up the upper surface intercommunication of hole and fixed baseplate.
Preferably, flexible guardrail post is cylindric, and the outer wall of flexible guardrail post is equiangular and is equipped with the ball spacing groove, and the ball spacing groove is the half slot, the bottom outer wall of flexible guardrail post is equipped with the anticreep limit, and the top of flexible guardrail post is equipped with the capital connector, and capital connector and flexible guardrail post structure as an organic whole, top one side of capital connector is equipped with the bar, adopts bolt fixed connection between bar and the capital connector.
Preferably, the deformable road guardrail is provided with a fixing pin close to the bottom, and the fixing pin is installed in a matching manner with the limiting pin installation groove and the fixing base.
Preferably, the guardrail post A of the deformable road guardrail and the telescopic guardrail rod are overturned in the pointing direction by an angle of 0-360 degrees.
Compared with the prior art, the invention has the beneficial effects that:
(1) the guardrail column A is provided with a limiting pin mounting groove on the outer side wall close to the bottom end, the limiting pin mounting groove is welded with the outer wall of the guardrail column A, a limiting pin mounting hole is formed in the limiting pin mounting groove in the vertical direction and penetrates through the limiting pin mounting groove in the vertical direction, balls are symmetrically arranged in the center and at two ends of the inner wall of the guardrail column A, the balls and the guardrail column A are movably mounted, resistance for reducing friction between the components is achieved through the balls, meanwhile, the components moving mutually can be limited, and relative operation between the components is more stable;
(2) the bottom end of the guardrail column A is provided with a connecting column, and the end heads of the two ends of the connecting column are all arc-shaped, so that the connecting part of the assembly can be conveniently bent;
(3) the telescopic guardrail column can adjust the distance between the guardrail column A and the guardrail column A within a certain range, so that the height of the guardrail is changed, and meanwhile, the length of the ladder stand is lengthened when the guardrail becomes the ladder stand, so that the telescopic guardrail column is suitable for deeper water areas;
(4) this deformable road guardrail not only has the effect of protection, can also buckle the guardrail simultaneously and become the rescue cat ladder at river bank, long embankment edge, has improved the effect of guardrail greatly.
Drawings
FIG. 1 is a side view of a deformable roadway barrier of the present invention;
FIG. 2 is a schematic illustration of a deformable roadway barrier of the present invention in an inverted configuration;
FIG. 3 is a side view of an engagement post according to the present invention;
FIG. 4 is a front view of a connector post according to the present invention;
fig. 5 is a cross-sectional view of a guardrail post a of the present invention.
In the figure: 1. a deformable roadway barrier; 2. a guardrail post A; 3. a limiting pin mounting groove; 4. a telescopic guard rail; 5. a column top connector; 6. a grab rail; 7. a fixing pin; 8. a fixed base; 9. connecting the column; 10. a fixing pin engaging hole; 11. a ball bearing; 12. a bearing ring; 13. a ball limiting groove; 14. and (5) connecting lugs.
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.
Referring to fig. 1-5, the present invention provides a technical solution: a deformable multifunctional road guardrail comprises a deformable road guardrail 1, a guardrail column A2 is arranged on the deformable road guardrail 1, connecting lugs 14 are symmetrically arranged at the bottom end of the guardrail column A2 close to the edges of two sides, connecting shaft mounting holes are formed in the connecting lugs 14, a limit pin mounting groove 3 is formed in the outer side wall of the guardrail column A2 close to the bottom end, the limit pin mounting groove 3 is connected with the outer wall of the guardrail column A2 in a welding mode, limit pin mounting holes are formed in the limit pin mounting groove 3 in the vertical direction and penetrate through the limit pin mounting groove 3 in the vertical direction, balls 11 are symmetrically arranged in the center and at two ends of the inner wall of the guardrail column A2, the balls 11 and the guardrail column A2 are movably mounted, resistance for reducing friction between components is achieved through the balls 11, meanwhile, limiting can be carried out on the components moving mutually, and relative operation between the components is more stable, the top end of the guardrail post A2 is provided with a telescopic guardrail post inlet and outlet.
The bottom end of the guardrail column A2 is provided with a joining column 9, the two end heads of the joining column 9 are circular arc-shaped, so that the bending of the joining position of the assembly is facilitated, the angle range of the turning of the joining column 9 in the vertical direction is 0-270 degrees, the joining column 9 is symmetrically provided with joining shafts close to the two sides of the end heads, the joining shafts and the joining column 9 are of an integral structure, the outer wall of the joining shaft is provided with a bearing ring 12, the outer wall of the joining column 9 is provided with a limiting pin mounting groove 3 close to the bottom end, the bottom end of the joining column 9 is provided with a fixed base 8, the bottom of the fixed base 8 is provided with a fixed base plate, the center of the fixed base plate is provided with the joining column, the outer wall of the joining column is equiangularly symmetrically provided with reinforcing angle steel, the reinforcing angle steel is in welded connection with the fixed base plate and the outer wall of the joining column, the fixed pin joining hole 10 is arranged inside the fixed base 8, the fixed pin joining hole 10 is communicated with the upper surface of the fixed base 8, the guardrail column A2, the connecting column 9 is movably connected with the fixed base 8.
Guardrail post A2's inside is equipped with flexible guardrail post 4, flexible guardrail post 4 is cylindricly, the angle such as outer wall of flexible guardrail post 4 is equipped with ball spacing groove 13, ball spacing groove 13 is the half slot, the bottom outer wall of flexible guardrail post 4 is equipped with the anticreep limit, the top of flexible guardrail post 4 is equipped with capital connector 5, capital connector 5 and flexible guardrail post 4 structure as an organic whole, top one side of capital connector 5 is equipped with bar 6, adopt bolt fixed connection between bar 6 and the capital connector 5.
The distance of business turn over guardrail post A2 can be adjusted at certain within range to flexible guardrail post 4, makes the change that the height of guardrail obtained like this, can also make the length of cat ladder become more elongated when the guardrail becomes the cat ladder simultaneously, can be applicable to the waters that more deepens like this.
The latter half setting of flexible guardrail post 4 is in guardrail post A2's inside, and the top of flexible guardrail post 4 is equipped with capital connector 5, and capital connector 5 and flexible guardrail post 4 structure as an organic whole, and top one side of capital connector 5 is equipped with bar 6, adopts screw fixed connection between bar 6 and the capital connector 5.
The fixing pin 7 is arranged near the bottom of the deformable road guardrail 1, the fixing pin 7 is matched with the limit pin mounting groove 3 and the fixing base 8, the guardrail column A2 of the deformable road guardrail 1 and the telescopic guardrail rod 4 are turned over in the pointed direction at an angle of 0-360 degrees, the fixing pin 7 is used for fixing the guardrail column A2, the connecting column 9 and the fixing base 8, so that the guardrail column A2, the connecting column 9 and the fixing base 8 are always in the same vertical direction, the deformable road guardrail 1 plays a role of a protective guardrail at the moment, when the deformable road guardrail 1 needs to be put down to serve as a ladder, the fixing pin 7 is unscrewed, the guardrail column A2, the connecting column 9 and the fixing base 8 are not fixed, therefore, the guardrail column A2 and the connecting column 9 can be turned outwards, the guardrail column A2 and the telescopic guardrail column 4 are hung outwards in the downward direction of one side, the guard rail at this time becomes a ladder stand.
This deformable road guardrail not only has the effect of protection, can also buckle the guardrail simultaneously and become the rescue cat ladder at river bank, long embankment edge, has improved the effect of guardrail greatly.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A deformable multifunctional road guardrail, comprising a deformable road guardrail (1), characterized in that: the deformable road guardrail (1) is provided with a guardrail column A (2), the bottom end of the guardrail column A (2) is provided with a connecting column (9), the bottom end of the connecting column (9) is provided with a fixed base (8), and the guardrail column A (2), the connecting column (9) and the fixed base (8) are movably connected;
the inside of guardrail post A (2) is equipped with flexible guardrail post (4), and the latter half of flexible guardrail post (4) sets up the inside in guardrail post A (2), the top of flexible guardrail post (4) is equipped with capital connector (5), capital connector (5) and flexible guardrail post (4) structure as an organic whole, top one side of capital connector (5) is equipped with bar (6), adopts screw fixed connection between bar (6) and capital connector (5).
2. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: connecting lugs (14) are symmetrically arranged at the bottom end of the guardrail column A (2) close to the edges of the two sides, connecting shaft mounting holes are formed in the connecting lugs (14), a limiting pin mounting groove (3) is formed in the side wall of the outer side of the guardrail column A (2) close to the bottom end, the limiting pin mounting groove (3) is connected with the outer wall of the guardrail column A (2) in a welding mode, a limiting pin mounting hole is formed in the limiting pin mounting groove (3) in the vertical direction, and the limiting pin mounting hole penetrates through the limiting pin mounting groove (3) in the vertical direction;
the inner wall center and the both ends symmetry of guardrail post A (2) are equipped with ball (11), movable mounting between ball (11) and guardrail post A (2), the top of guardrail post A (2) is equipped with flexible guardrail post and imports and exports.
3. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: the both ends end of linking up post (9) is circular-arcly, links up that the bilateral symmetry that post (9) is close to the end is equipped with links up the spiale, links up the spiale and links up post (9) structure as an organic whole, and the outer wall that links up the spiale is equipped with race ring (12), the outer wall that links up post (9) is close to the bottom and is equipped with spacer pin mounting groove (3).
4. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: the angle range of the connection column (9) turning in the vertical direction is 0-270 degrees.
5. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: the bottom of fixed baseplate (8) is equipped with fixed baseplate, and fixed baseplate's central authorities are equipped with links up the post, and the equal angular symmetry of the outer wall that links up the post is equipped with the angle steel of enhancement, strengthens angle steel and fixed baseplate, links up post outer wall welded connection, the inside of fixed baseplate (8) is equipped with fixed pin linkage hole (10), and fixed pin linkage hole (10) communicate with the upper surface of fixed baseplate (8).
6. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: the telescopic guardrail column (4) is cylindrical, the outer wall of the telescopic guardrail column (4) is provided with ball limiting grooves (13) at equal angles, the ball limiting grooves (13) are semicircular grooves, the bottom outer wall of the telescopic guardrail column (4) is provided with an anti-falling edge, the top end of the telescopic guardrail column (4) is provided with a column top connector (5), the column top connector (5) and the telescopic guardrail column (4) are of an integral structure, one side of the top end of the column top connector (5) is provided with a handrail rod (6), and the handrail rod (6) is fixedly connected with the column top connector (5) through bolts.
7. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: deformable road guardrail (1) is close to the bottom and is equipped with fixed pin (7), and cooperation installation between fixed pin (7) and spacer pin mounting groove (3), fixed baseplate (8).
8. A transformable multi-purpose roadway barrier as recited in claim 1, wherein: the guardrail column A (2) of the deformable road guardrail (1) and the telescopic guardrail rod (4) are turned over in the direction of the finger at an angle of 0-360 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210492370.6A CN114837113A (en) | 2022-05-07 | 2022-05-07 | Deformable multifunctional road guardrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210492370.6A CN114837113A (en) | 2022-05-07 | 2022-05-07 | Deformable multifunctional road guardrail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114837113A true CN114837113A (en) | 2022-08-02 |
Family
ID=82567792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210492370.6A Pending CN114837113A (en) | 2022-05-07 | 2022-05-07 | Deformable multifunctional road guardrail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114837113A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2554749A2 (en) * | 2011-08-02 | 2013-02-06 | Rautaruukki OYJ | Joint and stiffener system for a highway guardrail |
| CN202830758U (en) * | 2012-09-17 | 2013-03-27 | 福建省盛恒辉金属科技有限公司 | Connecting structure of upright and transverse member of guard railing and bridge guard railing without welding section |
| CN204551291U (en) * | 2015-04-17 | 2015-08-12 | 湖南艾翔机场设施有限公司 | A kind of apron guardrail of auto-manual |
| CN206517020U (en) * | 2016-12-31 | 2017-09-22 | 浙江省送变电工程公司 | A kind of multi-functional cable ditch crane span structure |
| CN208702038U (en) * | 2017-09-19 | 2019-04-05 | 天津市盛泰建筑工程有限公司 | A kind of stair railing |
| CN213329744U (en) * | 2020-08-24 | 2021-06-01 | 株洲市安顺铁艺锌钢护栏有限公司 | Adjustable guardrail |
| CN215926981U (en) * | 2021-10-21 | 2022-03-01 | 广东省水利水电第三工程局有限公司 | Protective barrier for reservoir construction |
-
2022
- 2022-05-07 CN CN202210492370.6A patent/CN114837113A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2554749A2 (en) * | 2011-08-02 | 2013-02-06 | Rautaruukki OYJ | Joint and stiffener system for a highway guardrail |
| CN202830758U (en) * | 2012-09-17 | 2013-03-27 | 福建省盛恒辉金属科技有限公司 | Connecting structure of upright and transverse member of guard railing and bridge guard railing without welding section |
| CN204551291U (en) * | 2015-04-17 | 2015-08-12 | 湖南艾翔机场设施有限公司 | A kind of apron guardrail of auto-manual |
| CN206517020U (en) * | 2016-12-31 | 2017-09-22 | 浙江省送变电工程公司 | A kind of multi-functional cable ditch crane span structure |
| CN208702038U (en) * | 2017-09-19 | 2019-04-05 | 天津市盛泰建筑工程有限公司 | A kind of stair railing |
| CN213329744U (en) * | 2020-08-24 | 2021-06-01 | 株洲市安顺铁艺锌钢护栏有限公司 | Adjustable guardrail |
| CN215926981U (en) * | 2021-10-21 | 2022-03-01 | 广东省水利水电第三工程局有限公司 | Protective barrier for reservoir construction |
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Application publication date: 20220802 |
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