CN112942189B - Anti-collision device for highway engineering safety management - Google Patents
Anti-collision device for highway engineering safety management Download PDFInfo
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- CN112942189B CN112942189B CN202110131535.2A CN202110131535A CN112942189B CN 112942189 B CN112942189 B CN 112942189B CN 202110131535 A CN202110131535 A CN 202110131535A CN 112942189 B CN112942189 B CN 112942189B
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- fixed
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- barrel body
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- 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
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- 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
- E01F15/003—Individual devices arranged in spaced relationship, e.g. buffer bollards
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- 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
- E01F15/14—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 specially adapted for local protection, e.g. for bridge piers, for traffic islands
- E01F15/145—Means for vehicle stopping using impact energy absorbers
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses an anti-collision device for highway engineering safety management in the technical field of anti-collision devices, which comprises an anti-collision barrel body, wherein installation seats are fixed at the top and the bottom of the anti-collision barrel body, a connecting frame is vertically fixed at the middle part in the anti-collision barrel body, a buffer reset piece is attached to the inner wall of the right side of the anti-collision barrel body, the buffer reset piece comprises a buffer piece attached to the inner wall of the right side of the anti-collision barrel body, the left side of the buffer piece is connected with an installation piece, the left side and the right side of the installation piece are fixedly arranged in the middle part of the connecting frame in a penetrating manner, the anti-collision barrel body is provided with the buffer reset piece, when being impacted, the anti-collision barrel body drives an arc contact plate, the arc contact plate shares the received impact force to a connecting rod, the connecting rod drives a sliding block to slide on a guide rod, and simultaneously drives a movable rod and a movable plate to extrude an elastic telescopic rod to further buffer through an extrusion spring, thereby better protecting public buildings, and the damage to the vehicle is reduced to the maximum extent, and the safety of passengers is also ensured.
Description
Technical Field
The invention relates to the technical field of anti-collision devices, in particular to an anti-collision device for highway engineering safety management.
Background
At present, the road construction all over the country is rapidly developed, and the number of motor vehicles is rapidly increased, so that the traffic accidents are increased. Particularly, in urban roads, the collided traffic accidents are visible everywhere, and the accidents that public buildings are damaged by vehicle collision are avoided. Therefore, it is necessary to take some protective measures for some important road sections or some important facilities. The guardrail on present many roads all carries out collision avoidance through setting up crashproof bucket.
At present, the anticollision bucket on the market adopts plastic materials to make mostly, and the inside is not fill sand or be the water injection, generally speaking, and current anticollision bucket shock-absorbing capacity is relatively poor to can inwards cave in when receiving the striking, be difficult to reset at the later stage, sunken simultaneously leads to the depressed area and produces the indentation easily with complete regional handing-over department, has the cracked probability of anticollision bucket, thereby makes the unable reuse of anticollision bucket, has improved use cost. Therefore, the anti-collision device for the safety management of the highway engineering is provided.
Disclosure of Invention
The invention aims to provide an anti-collision device for highway engineering safety management, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an anti-collision device for highway engineering safety control, includes the anticollision staving, anticollision staving top and bottom all are fixed with the mount pad, the vertical link that is fixed with in middle part in the anticollision staving, and the laminating of the right side inner wall of anticollision staving has the buffering piece that resets, the buffering piece that resets is including the laminating bolster at the right side inner wall of anticollision staving, the bolster left side is connected with the installed part, the fixed middle part that runs through the setting at the link about the installed part.
Furtherly, the bolster is including the laminating arc contact plate at the right side inner wall of anticollision staving, link right side top and bottom all are fixed with insert one, and installed part right side top and bottom all are fixed with insert two, and the top is inserted two, the bottom is inserted one and the bottom and is inserted and all be fixed with guide arm one between two, two sets of guide arm outer wall all movable sleeve is equipped with the slider, and two sets of guide arm outer walls all overlap and be equipped with spring one, top spring one is in the top insert one with the top between the slider, the bottom spring one is in the bottom insert one with the bottom between the slider.
Furthermore, the right sides of the two groups of sliding blocks are hinged with connecting rods, the other ends of the connecting rods are hinged with the top and the bottom of the left side of the arc-shaped contact plate respectively, a movable rod is fixed in the middle of the left side of the arc-shaped contact plate, and the left side of the movable rod is movably inserted in the right side of the mounting part.
Further, the installed part is including controlling the fixed shell that runs through the setting at the link middle part, the right side slides in the shell and is provided with the fly leaf, and the left side top and the bottom of fly leaf all are fixed with elastic telescopic rod, the left side of link is fixed with the support frame that the vertical section is the U-shaped, and the left side outer wall of support frame and the laminating of the left side inner wall of anticollision staving, and is two sets of elastic telescopic rod's left end all is fixed with support frame right side outer wall, support frame right side outer wall just is provided with the ejection piece in the position between two sets of elastic telescopic rod.
Furthermore, the ejector comprises a connecting seat which is fixed on the outer wall of the right side of the support frame and is positioned between two groups of elastic telescopic rods, an ejector rod is movably inserted in the right side of the connecting seat, a contact plate corresponding to the movable plate is fixed on the right side of the ejector rod, an electromagnetic block is fixed on the inner wall of the left side of the connecting seat, a ferrous block matched with the electromagnetic block is arranged on the right side of the electromagnetic block, the electromagnetic block is electrified to generate magnetic force repelling with the ferrous block, connecting posts are fixed on the top and the bottom of the ferrous block respectively, the top of each connecting post movably penetrates through the top of the connecting seat, a movable opening matched with the connecting posts is transversely formed in the top of the connecting seat, convex blocks are fixed on the left side and the right side of the top of the connecting seat respectively, a second guide rod is fixed between the left and the right side convex blocks, a sliding sleeve is movably sleeved on the outer wall of the guide rod, and the other end of the connecting post are fixed with the sliding sleeves on the top and the bottom respectively, the outer wall of the second guide rod is sleeved with a second spring, and the second spring is located between the sliding sleeve and the right lug.
Further, the top is provided with the trigger piece in the link, the trigger piece includes the connecting block that sets up top in the link through pivot and torsional spring activity, connecting block top right side be fixed with the slider complex touching opening button at top, top and bottom the equal fixed cover of a guide arm outer wall is equipped with the stopper, and the bottom of bottom stopper and the top laminating of the slider of bottom, top the touching closing button that the embedding set up is passed through at the top of stopper and the bottom laminating of the slider at top, the touching closing button and the equal electric connection electromagnetic block of touching opening button.
Compared with the prior art, the invention has the beneficial effects that: the invention is provided with a buffer reset piece, when the barrel body is impacted, an arc contact plate is driven, the impact force received by the arc contact plate is shared by a connecting rod, the connecting rod drives a sliding block to slide on a guide rod I and buffer through an extrusion spring I, and simultaneously drives a movable rod and a movable plate to extrude an elastic telescopic rod for further buffering, thereby not only better protecting public buildings, but also reducing the damage of vehicles to the maximum extent, and ensuring the safety of passengers, and the invention is also provided with a trigger piece matched with an ejector piece, when the impact object leaves the barrel body, under the action of the spring I and the elastic telescopic rod, the arc contact plate enables a concave part generated by the impact of the barrel body to reset, so that the sliding block slides on the guide rod I, contacts an opening button when the impact object slides inwards, and further opens an electromagnetic block, the electromagnetic block is electrified to generate the same magnetic force as that of the iron block, under the action of homopolar repulsion, the irony piece drives the ejector beam, contact plate contact fly leaf, give fly leaf and the outside pressure of movable rod, make the depressed part reset, thereby make the anticollision staving resume initial condition, slider downward contact touching closing button when resuming initial condition, the electromagnetism piece outage, under the effect of spring two, irony piece drives ejector beam and contact plate and resets, make this anticollision staving carry out reuse once more on the one hand, on the other hand has avoided depressed area and complete regional handing-over department to produce the indentation easily, the cracked probability of anticollision bucket has been reduced, the life of anticollision bucket has been prolonged.
Drawings
FIG. 1 is a cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic view of the mounting member of the present invention;
FIG. 3 is a cross-sectional view of the ejector structure of the present invention;
FIG. 4 is an enlarged view of the structure A of FIG. 2 according to the present invention.
In the figure: 1. the barrel body is prevented from collision; 2. a mounting seat; 3. a connecting frame; 4. a buffer reset member; 41. a buffer member; 411. an arc-shaped contact plate; 412. a connecting rod; 413. a first guide rod; 414. a slider; 415. a first spring; 416. a movable rod; 42. a mounting member; 421. a housing; 422. an elastic telescopic rod; 423. pushing out the piece; 4231. a connecting seat; 4232. pushing out the rod; 4233. a contact plate; 4234. a second spring; 4235. connecting columns; 4236. a ferrous block; 4237. an electromagnetic block; 424. a movable plate; 431. connecting blocks; 432. touching an opening button; 433. a limiting block; 434. touching a closing button; 5. a support frame.
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
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. 1-4, the invention provides an anti-collision device for highway engineering safety management, wherein a solar panel is arranged on one side of the top of an anti-collision barrel body 1, a storage battery is arranged in the anti-collision barrel body 1 to supply power for electrical components in the anti-collision device, the solar panel adopts a 'photoelectric' direct conversion mode to directly convert solar radiation into electric energy by utilizing photoelectric effect, the anti-collision device is widely applied in the field, detailed description is not needed, the anti-collision device comprises the anti-collision barrel body 1, mounting seats 2 are fixed on the top and the bottom of the anti-collision barrel body 1, the anti-collision device is convenient to mount on an external guardrail by the mounting seats 2, the anti-collision device is certainly not limited to mount on the mounting seats 2, other modes can be adopted for mounting, detailed description is not needed, a connecting frame 3 is vertically fixed in the middle part of the anti-collision barrel body 1, and a buffer reset piece 4 is attached to the inner wall of the right side of the anti-collision barrel body 1, buffering piece 4 resets includes the laminating at the bolster 41 of the right side inner wall of anticollision staving 1, and bolster 41 left side is connected with installed part 42, and fixed the setting in the middle part of link 3 that runs through about installed part 42.
Referring to fig. 1 and 2, the buffer 41 includes an arc contact plate 411 attached to the right inner wall of the barrel body 1, the arc contact plate 411 is preferably made of rubber material, the top and bottom of the right side of the connecting frame 3 are both fixed with a first insert to play a role of supporting and installing a structure, the top and bottom of the right side of the installing part 42 are both fixed with a second insert, specifically fixed to the right side of the housing 421, guide rods 413 are fixed between the first insert at the top and the second insert at the top and between the first insert at the bottom and the second insert at the bottom to guide the movement of the sliding block 414, the sliding blocks 414 are movably sleeved on the outer walls of the two guide rods 413, springs 415 are sleeved on the outer walls of the two guide rods 413, the springs 415 play a role of buffering impact force, the first spring 415 at the top is located between the first insert at the top and the sliding block 414 at the top, the first spring 415 at the bottom is located between the insert at the first insert at the bottom and the sliding block 414 at the bottom, one end of a first spring 415 is fixed with the first insert, and the other end of the first spring is fixed with the sliding block 414;
referring to fig. 1 and 2, the right sides of the two sets of sliders 414 are hinged to connecting rods 412, the other ends of the two sets of connecting rods 412 are hinged to the top and the bottom of the left side of the arc-shaped contact plate 411, the arc-shaped contact plate 411 moves to drive the connecting rods 412 to move the sliders 414, a movable rod 416 is fixed in the middle of the left side of the arc-shaped contact plate 411, the arc-shaped contact plate 411 also moves to drive the movable rod 416 to move, the left side of the movable rod 416 is movably inserted into the right side of the mounting member 42, and specifically, the left side of the movable rod 416 is movably inserted into the right side of the housing 421;
referring to fig. 2, the mounting member 42 includes a casing 421 which is fixedly disposed in the middle of the connecting frame 3 in a penetrating manner from left to right, the casing 421 plays a role of supporting and mounting structure, the joint between the casing 421 and the connecting frame 3 is welded, a movable plate 424 is slidably disposed on the right side in the casing 421, the movable plate 424 is movable in the casing 421, and elastic telescopic rods 422 are fixed on the top and bottom of the left side of the movable plate 424, the elastic telescopic rods 422 are widely used in the field, and include springs which are sleeved on the outer wall of the telescopic rods, a support frame 5 with a U-shaped vertical cross-section is fixed on the left side of the connecting frame 3, the support frame 5 prevents the left side of the barrel body 1 from being impacted, the barrel body 1 of the present invention can be disposed at a guardrail beside a road, the surface for preventing impact is the right side, the surface for preventing impact faces the road when mounting, so that only the impact surface (right side) can be impacted, the left outer wall of the support frame 5 is attached to the left inner wall of the anti-collision barrel body 1, the left ends of the two groups of elastic telescopic rods 422 are fixed to the right outer wall of the support frame 5, and a pushing piece 423 is arranged on the right outer wall of the support frame 5 and between the two groups of elastic telescopic rods 422;
referring to fig. 3, the ejector 423 includes a connection seat 4231 fixed on the outer wall of the right side of the support frame 5 and located between the two sets of elastic expansion rods 422, an ejector rod 4232 is movably inserted on the right side of the connection seat 4231, a contact plate 4233 corresponding to the movable plate 424 is fixed on the right side of the ejector rod 4232, the contact plate 4233 can move to contact the movable plate 424, an electromagnetic block 4237 is fixed on the inner wall of the left side of the connection seat 4231, the electromagnetic block 4237 is energized to generate a magnetic force repelling the iron block 4236, a connection post 4235 is fixed on the top and the bottom of the iron block 4236, the top of the connection post 4235 movably penetrates through the top of the connection seat 4231, a movable opening matched with the connection post 4235 is transversely formed on the top of the connection seat 4231 to facilitate the movement of the iron block 4236, protruding blocks are fixed on the left and right sides of the top and the bottom of the connection seat 4231, a second guide rod is fixed between the left and right side convex blocks, a sliding sleeve is movably sleeved on the outer wall of the second guide rod, the other ends of the top and bottom connecting columns 4235 are fixed with the top and bottom sliding sleeves respectively, a second spring 4234 is sleeved on the outer wall of the second guide rod, the second spring 4234 is positioned between the sliding sleeve and the right side convex block, one end of the second spring 4234 is fixed with the sliding sleeve, the other end of the second spring 4234 is fixed with the right side convex block, and when the electromagnetic block 4237 is powered off, the iron block 4236 is reset;
referring to fig. 4, a trigger is disposed at the top inside the connecting frame 3, the trigger includes a connecting block 431 movably disposed at the top inside the connecting frame 3 through a rotating shaft and a torsion spring, a movable opening is disposed through the left and right sides of the top inside the connecting frame 3, the rotating shaft and the torsion spring are widely used in the field, and similar to a lever in the field, the rotating shaft is fixedly disposed at the front and back of the connecting block 431 and penetrates through the middle of the connecting block 431, the torsion spring is used for driving the swinging connecting block 431 to return, a touch opening button 432 is fixed at the right side of the top of the connecting block 431 and is matched with the top slider 414, the touch opening button 432 controls the opening of the electromagnetic block 4237, the outer walls of the top and bottom guide rods 413 are fixedly sleeved with a limiting block 433 for limiting the position of the slider 414, the bottom of the bottom limiting block 433 is attached to the top of the bottom slider 414, the top of the top limiting block 433 is attached to the bottom of the top slider 414 through a touch closing button 434, the slider 414 is attached to the limiting block 433 to be in an initial state, the slider 414 on the top moves upwards to drive the right end of the connecting block 431 to move upwards, when the slider 414 continues to move upwards, the slider 414 on the top disengages from the connecting block 431, the slider 414 on the top moves downwards to drive the right end of the connecting block 431 to move downwards and touch the touch opening button 432, when the slider 414 on the top continues to move downwards, the slider 414 on the top disengages from the connecting block 431, and the touch closing button 434 and the touch opening button 432 are both electrically connected with the electromagnetic block 4237.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
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 (2)
1. The utility model provides a highway engineering buffer stop for safety control, includes anticollision staving (1), its characterized in that: the anti-collision barrel is characterized in that mounting seats (2) are fixed at the top and the bottom of the anti-collision barrel body (1), a connecting frame (3) is vertically fixed at the middle part in the anti-collision barrel body (1), a buffering reset piece (4) is attached to the right inner wall of the anti-collision barrel body (1), the buffering reset piece (4) comprises a buffering piece (41) attached to the right inner wall of the anti-collision barrel body (1), a mounting piece (42) is connected to the left side of the buffering piece (41), the mounting piece (42) penetrates through the middle part of the connecting frame (3) in a left-right fixing mode, the buffering piece (41) comprises an arc contact plate (411) attached to the right inner wall of the anti-collision barrel body (1), inserts I are fixed at the top and the bottom of the right side of the connecting frame (3), inserts II are fixed at the top and the bottom of the right side of the mounting piece (42), guide rods I (413) are fixed between the top insert I and the bottom insert II, the outer walls of the two groups of first guide rods (413) are respectively and movably sleeved with a sliding block (414), the outer walls of the two groups of first guide rods (413) are respectively and movably sleeved with a first spring (415), the first spring (415) at the top is positioned between the first top insert and the sliding block (414) at the top, and the first spring (415) at the bottom is positioned between the first bottom insert and the sliding block (414) at the bottom;
the mounting piece (42) comprises a shell (421) which is fixedly arranged in the middle of the connecting frame (3) in a penetrating manner from left to right, a movable plate (424) is arranged in the shell (421) in a sliding manner from the right side to the left side, elastic telescopic rods (422) are fixed to the top and the bottom of the left side of the movable plate (424), a supporting frame (5) with a U-shaped vertical section is fixed to the left side of the connecting frame (3), the outer wall of the left side of the supporting frame (5) is attached to the inner wall of the left side of the anti-collision barrel body (1), the left ends of the two groups of elastic telescopic rods (422) are fixed to the outer wall of the right side of the supporting frame (5), and a push-out piece (423) is arranged between the two groups of elastic telescopic rods (422) and the outer wall of the right side of the supporting frame (5);
the ejector piece (423) comprises a connecting seat (4231) which is fixed on the outer wall of the right side of the support frame (5) and is positioned between two groups of elastic telescopic rods (422), an ejector rod (4232) is movably inserted in the right side of the connecting seat (4231), a contact plate (4233) corresponding to the movable plate (424) is fixed on the right side of the ejector rod (4232), an electromagnetic block (4237) is fixed on the inner wall of the left side of the connecting seat (4231), a ferrous block (4236) matched with the electromagnetic block (4237) is arranged on the right side of the electromagnetic block (4237), the electromagnetic block (4237) is electrified to generate magnetic force repelling with the ferrous block (4236), connecting columns (4235) are fixed on the top and the bottom of the ferrous block (4236), the top of each connecting column (4235) movably penetrates through the top of the connecting seat (4231), a movable port matched with the connecting columns (4235) is transversely formed in the top of the connecting seat (4231), and convex blocks are fixed on the left side and the right side of the top and the bottom of the connecting seat (4231), a second guide rod is fixed between the left and right side convex blocks, a sliding sleeve is movably sleeved on the outer wall of the second guide rod, the other ends of the top and bottom connecting columns (4235) are respectively fixed with the top and bottom sliding sleeves, a second spring (4234) is sleeved on the outer wall of the second guide rod, and the second spring (4234) is positioned between the sliding sleeve and the right side convex block;
the top is provided with the trigger piece in link (3), the trigger piece includes connecting block (431) that sets up top in link (3) through pivot and torsional spring activity, connecting block (431) top right side is fixed with slider (414) complex touching opening button (432) with the top, top and bottom guide arm (413) outer wall all fixed cover is equipped with stopper (433), and the bottom of bottom stopper (433) and the top laminating of slider (414) of bottom, top the touching closing button (434) that sets up through the embedding in the top of stopper (433) is laminated with the bottom of slider (414) at top, touching closing button (434) and the touching opening button (432) equal electric connection electromagnetic block (4237) at top.
2. The anti-collision device for the safety management of the highway engineering according to claim 1, wherein: the right sides of the two groups of sliding blocks (414) are hinged with connecting rods (412), the other ends of the two groups of connecting rods (412) are hinged with the top and the bottom of the left side of the arc-shaped contact plate (411) respectively, a movable rod (416) is fixed in the middle of the left side of the arc-shaped contact plate (411), and the left side of the movable rod (416) is movably inserted into the right side of the mounting part (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110131535.2A CN112942189B (en) | 2021-01-30 | 2021-01-30 | Anti-collision device for highway engineering safety management |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110131535.2A CN112942189B (en) | 2021-01-30 | 2021-01-30 | Anti-collision device for highway engineering safety management |
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| CN112942189A CN112942189A (en) | 2021-06-11 |
| CN112942189B true CN112942189B (en) | 2022-06-07 |
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