CN114351616B - Temporary safety facility - Google Patents
Temporary safety facility Download PDFInfo
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- CN114351616B CN114351616B CN202111676581.7A CN202111676581A CN114351616B CN 114351616 B CN114351616 B CN 114351616B CN 202111676581 A CN202111676581 A CN 202111676581A CN 114351616 B CN114351616 B CN 114351616B
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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
- 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
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Abstract
The invention relates to the technical field of highway safety facility design, and particularly discloses a temporary safety facility, which comprises a bottom panel, wherein the bottom panel is fixedly connected with a supporting plate which inclines towards one side where the bottom panel is positioned, an included angle of 45-75 degrees is formed between the supporting plate and the bottom panel, the supporting plate is provided with a free plate, one end of the free plate, which is far away from the supporting plate, is fixedly connected or abutted with the bottom panel, and the distance between one end of the free plate, which is far away from the supporting plate, and one end of the bottom plate, which is far away from the supporting plate, is greater than 0.5m. The temporary safety facility solves the problem that the conventional temporary safety facility is easy to topple over, so that traffic safety accidents are not easy to occur, and the safety of drivers, passengers and pedestrians is not easy to influence.
Description
Technical Field
The invention relates to the technical field of highway safety facility design, in particular to a temporary safety facility.
Background
At present, a large number of roads with longer operation time need to be subjected to pavement reconstruction, and a large number of temporary safety facilities are adopted for isolation, such as a light reflecting cone and the like, in the whole construction process in order to ensure smooth traffic.
The existing temporary safety facilities basically have the visual isolation effect, the temporary safety facilities are easy to topple under the extreme weather conditions such as unstable air pressure, collision, strong wind and heavy rainfall caused by vehicles running at high speed, the temporary safety facilities not only occupy the width of the road surface after toppling over, but also have the risk of being blown away by wind and rain, the driving safety is seriously influenced, and great potential safety hazards are generated for drivers and passengers.
Disclosure of Invention
In order to solve the problem that the current temporary safety facility is easy to topple over, so that traffic safety accidents are easy to occur and the safety of drivers, passengers and pedestrians is threatened, the application provides a temporary safety facility.
The utility model provides a temporary safety facility, includes the bottom plate, bottom plate fixedly connected with is towards the bearing plate of bottom plate place one side slope, be 45-75 contained angle between bearing plate and the bottom plate, the bearing plate is provided with the free board, free board keeps away from bearing plate one end and bottom plate fixed connection or butt, free board keeps away from bearing plate one end and bottom plate and keeps away from the distance of bearing plate one end and be greater than 0.5m.
The bottom panel, the supporting plate and the free plate enclose a stable triangle structure, and the contact area of the bottom panel and the ground is large, so that the bottom panel is good in interference effect against extreme weather conditions such as unstable air pressure, slight collision of the vehicle, strong wind, heavy rainfall and the like caused by the high-speed running vehicle, and is not easy to fall. Under the state of use, keep away from bearing plate one side with the bottom plate and face the driving side, when the temporary safety facility situation of this application is collided to the vehicle, the vehicle front wheel gets into the bottom plate face and collides with the free board, because the area of contact of bottom plate and ground is obviously big in the vehicle front wheel for the gliding frictional force greatly increased of vehicle, in addition the automobile body part dead weight makes the frictional force of bottom plate and ground increase sharply, thereby the impact force of vehicle has been alleviated greatly, reduce the vehicle damage degree, be favorable to protecting driver and passenger safety, it is visible that above-mentioned temporary safety facility is difficult for empting, can effectively reduce the emergence of incident.
In addition, the triangular top surface can be provided with traffic signs and marks to warn vehicles to come and go, and traffic signs and marks can be drawn by using warning lamps or fluorescent pigments, so that a good warning effect is achieved on vehicles driving at night.
Preferably, a stiffening plate is arranged on the bottom panel, and one end, far away from the supporting plate, of the stiffening plate is abutted with the free plate.
When a vehicle collides with the free plate, the stiffening plate is abutted against the free plate, so that the capability of the free plate for resisting the impact generated by the collision of the vehicle is greatly enhanced, the temporary safety facility is not easy to damage in the collision process, and the impact force of the vehicle can be better and continuously resisted, thereby the temporary safety facility reduces the damage to the vehicle caused by the collision and protects the safety of drivers and passengers.
Preferably, a sponge layer is fixedly connected to one side of the free plate, which is far away from the supporting plate, and the sponge layer completely covers the side surface of the free plate, which is far away from the supporting plate.
The sponge layer can better relieve the impact force caused by severe collision between the vehicle and the free plate, reduce the damage degree of the vehicle and protect the safety of drivers and passengers.
Preferably, the temporary safety facilities all adopt steel plates.
Above-mentioned interim safety device is the steel sheet preparation, on the one hand can increase interim safety device's dead weight, and the ability of the comparatively extreme weather conditions's such as the unstable, slight collision of vehicle, strong wind and heavy rainfall interference of the vehicle that the reinforcing was resisted that it was brought of high-speed driving, interim safety device is difficult for empting more, and steel sheet intensity is better, can resist the vehicle collision better and not fragile in the collision process. The steel plate is weather-resistant high-strength steel plate. And the contact surfaces of the steel plates and the outside are coated with anti-corrosion paint.
The temporary safety facilities of this application all adopt the steel sheet, even the device receives the damage, also be convenient for weld maintenance, the steel also is convenient for recycle.
Preferably, the bottom panel is formed by hinging a bottom main board and a bottom auxiliary board, the supporting board is fixedly connected with the bottom auxiliary board, and the supporting board is hinged with the free board.
When the temporary safety facility is used, the bottom main board is horizontally placed on the ground, the bottom auxiliary board is folded towards one side where the bottom main board is located, and the free board is in butt joint with the bottom main board to play a supporting role, so that the temporary safety facility is stably placed by self gravity, has the capability of resisting wind and rain, and cannot fall down even if the temporary safety facility is slightly collided by a vehicle. Meanwhile, the side face of the supporting plate, deviating from the bottom auxiliary plate, is inclined towards the driving side, and the warning lamp, the traffic sign, the traffic marking, the temporary traffic organization sign and the like are arranged on the side face, so that the driver and the passenger coming from the driving side are very obvious, a better warning effect can be achieved, and night travel is guaranteed.
Under sudden emergency, the force that vehicle and free board collision produced makes the bottom surface subplate move to the ground along articulated department towards the direction that is close to ground, bottom surface board and ground area increase, frictional force reinforcing, and the free board overturn along the pin joint to support tightly with stiffening plate department, backup pad, free board and bottom surface board enclose into triangle-shaped, and the vehicle rushes into the regional collision of floor board and free board, the front wheel of vehicle is located the bottom surface board top this moment, utilize the automobile body dead weight to make the frictional force of the bottom surface board and the ground of area increase, make the impact buffering of vehicle's effect preferred, thereby reduce the vehicle damage and protect the safety of driver and passenger.
Preferably, the support plate is provided with one or more of a warning lamp, a traffic sign, a traffic marking and a warning sign. Further, the warning lamp is a magnetic type warning lamp.
Preferably, the limiting block fixedly connected to the bottom panel is used for preventing the free plate from sliding towards the direction away from the hinging prescription of the bottom main plate and the bottom auxiliary plate.
The limiting block can effectively prevent the free plate from sliding towards the driving side, so that the stability of the using state of the temporary safety facility is improved, the capability of the temporary safety facility for resisting external environment interference is enhanced, and the using state of the temporary safety facility can be maintained to play a better warning role under the condition of no severe collision of vehicles. Preferably, the thickness of the limiting block is 1-10mm. When the thickness of the limiting block is 1-10mm, the effect of preventing the free plate from sliding towards the driving side is obvious, and the vehicle is prevented from entering the bottom panel area.
Preferably, a spring is fixedly connected between the side surfaces of the support plate and the free plate, which are close to each other, and the spring is in a compressed or balanced state.
Under the temporary safety facility use state, the spring is in a compressed state, tension is generated on the free plate, the free plate is balanced under the action of the limiting block, if the free plate is scratched instead of violent collision in the vehicle running process, the force of the vehicle scratching the free plate and the force direction of the spring endowed to the free plate are opposite and offset each other, so that the temporary safety facility can keep the use state, is not easy to overturn and encloses into a triangle, and can keep a better warning effect.
In addition, under the severe collision condition, the vehicle impacts the free plate, the free plate moves towards the direction close to the supporting plate, when the free plate abuts against the stiffening plate, the compression degree of the spring is improved, the force of the free plate for resisting the collision of the vehicle is further increased, the impact force of the vehicle is further slowed down, the damage degree of the vehicle is further reduced, and the safety of drivers and passengers is further improved.
Preferably, the end surface of the bottom panel away from the support plate is an inclined downward guide surface.
When the vehicle collides with the temporary safety facility, the wheels are guided to the temporary safety facility through the guide surface, and the friction force between the temporary safety facility and the ground is increased greatly through the increase of the contact area between the bottom panel and the ground and the action of the dead weight of the vehicle, so that the impact force of the vehicle is relieved greatly, and the occurrence of safety accidents is reduced.
Preferably, the side surface of the bottom panel, which is away from the supporting plate, is fixedly connected with anti-slip lines.
The friction force between the bottom panel and the ground can be improved due to the arrangement of the anti-skid grains, and the effect of buffering the impact force of the vehicle by the temporary safety facility is improved.
In summary, the present application has the following beneficial effects:
1. the bottom panel, the support plate and the free plate are closed to form a stable triangle structure, the contact area between the bottom panel and the ground is large, and the bottom panel is good in interference effect against extreme weather conditions such as unstable air pressure, slight collision of the vehicle, strong wind and heavy rainfall caused by the high-speed running vehicle, and is not easy to topple. When the vehicle collides with the temporary safety facility, the front wheels of the vehicle enter the bottom panel area and collide with the free plate, and the self-weight of the vehicle body part is matched with the bottom panel with a larger area to enable the friction force to be increased sharply, so that the impact force of the vehicle is greatly relieved, the damage degree of the vehicle is reduced, and the safety of drivers and passengers is protected.
2. When the vehicle collides with the free plate violently, the stiffening plate abuts against the free plate, so that the capability of the free plate for abutting against the impact generated by the collision of the vehicle is greatly enhanced, and the temporary safety facility is not easy to damage in the collision process.
3. The side face of the supporting plate, which is away from the bottom auxiliary plate, is inclined towards the driving side, and warning lamps, traffic signs, traffic marking lines, temporary traffic organization marks and the like are arranged on the side face, so that the supporting plate is very obvious for drivers and passengers coming from the driving side, can play a better warning role, and ensures night travel.
4. The spring is arranged between the side surfaces of the support plate and the free plate, which are close to each other, and is in a compressed state, so that the impact force of the free plate can be better resisted when the vehicle collides slightly or scratches, the state of the temporary safety facility is not easy to change, and a better warning effect is kept.
Drawings
Fig. 1 is a schematic view of a temporary security device of example 1.
Fig. 2 is a schematic view showing a normal use state of the temporary safety facility of embodiment 2.
Fig. 3 is another angular schematic view of the temporary safety facility of embodiment 2 in a normal use state.
Fig. 4 is a schematic diagram showing the transition of the temporary safety facility of example 2 to an operating state.
Fig. 5 is a schematic view showing the operation state of the temporary safety facility of embodiment 2.
Reference numerals illustrate:
1. a bottom panel; 11. a bottom surface main board; 12. a bottom side sub-plate; 2. a support plate; 3. a free plate; 4. stiffening plates; 5. a spring; .
Detailed Description
Example 1
Referring to fig. 1, a temporary safety facility includes a bottom panel 1 for being laid on the ground, the bottom panel 1 is a rectangular plate, one end of the bottom panel 1 is fixedly connected with an inclined support plate 2, one end of the support plate 2 far away from the bottom panel 1 is fixedly connected with a free plate 3, one end of the free plate 3 far away from the support plate 2 is fixedly connected with the bottom panel 1, three plates of the bottom panel 1, the support plate 2 and the free plate 3 are closed to form a triangle, the other end of the bottom panel 1 extends towards the direction far away from the support plate 2, the distance between the other end of the bottom panel 1 and the connection part of the free plate 3 and the ground is not less than 0.5m, in this embodiment, 0.8m, 1m, 1.2m, 1.4m, 1.6m, 1.8m and 2m, etc., and the contact area between the bottom panel 1 and the ground of the temporary safety facility is larger, so that the stability of the temporary safety facility is good and not easy to topple.
Referring to fig. 1, the end surface of the bottom panel 1 at the end remote from the support plate 2 is a guide surface inclined downward to facilitate guiding the wheels onto the bottom panel 1 so that the front wheels of the vehicle enter the area above the bottom panel 1.
The side of the free plate 3 facing away from the support plate 2 is fixedly connected with a sponge layer (not shown in the figures), which completely covers the side of the free plate 3 facing away from the support plate 2.
Referring to fig. 1, a stiffener is fixedly connected to one side of the bottom panel 1, which is close to the support plate, and one side of the stiffener, which is far away from the support plate 2, is abutted against the free plate 3, so that the free plate 3 is endowed with better impact resistance, and the capability of the free plate 3 for resisting vehicle impact is enhanced.
The temporary safety facility is made of steel, so that the dead weight of the temporary safety facility is enhanced, the possibility that the temporary safety facility falls down due to unstable air pressure, slight collision, strong wind, strong rainfall and other extreme weather conditions of a vehicle running at a high speed is reduced, a weather-resistant high-strength steel plate is adopted as a bottom plate, and the contact surfaces of the steel and the outside are coated with anti-corrosion paint, so that the weather resistance of the steel is improved, and the influence of corrosion on the strength of the steel is reduced.
The one side fixedly connected with anti-skidding line that bottom plate 1 is used for with ground contact makes the frictional force increase of bottom plate 1 and ground, improves the vehicle buffering effect.
The outer side surface of the joint of the support plate 2 and the free plate 3 is magnetically connected with a magnetic attraction type warning lamp so as to ensure night travel.
Under the state of use, the bottom plate 1 is the same with the driving direction from keeping away from bearing plate 2 one end to being close to bearing plate 2 one end, and the bottom plate 1 of interim safety device and bottom surface area of contact are big and have certain dead weight, are difficult for toppling over because of natural weather and slight scraping damage, meet emergency, pass through the guide surface with the wheel direction interim safety device, the vehicle is driven to bottom plate 1 face and collide with free board 3, because bottom plate 1 and the area of contact on ground are great and have great frictional force, add the partial gravity of vehicle and make bottom plate 1 and frictional force on ground greatly increased, thereby the impact force that the great buffering vehicle brought reduces the vehicle damage degree and improves the safety of driver and passenger simultaneously.
Example 2
The difference from example 1 is that: referring to fig. 2, the bottom panel 1 is composed of a bottom main board 11 and a bottom auxiliary board 12, a hinge is fixedly connected between the bottom main board 11 and the bottom auxiliary board 12, so that the bottom main board 11 and the bottom auxiliary board 12 are hinged, the supporting board 2 and the stiffening board 4 are located at one side of the bottom auxiliary board 12, a hinge is fixedly connected between the supporting board 2 and the free board 3, so that the supporting board 2 and the free board 3 are hinged, an included angle between the supporting board 2 and the bottom board 1 is 45-75 degrees, the included angle is 45 degrees, other embodiments can be 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees and 75 degrees, the bottom auxiliary board 12 is folded towards one side of the bottom main board 11, and the position of the free board 3 is adjusted to be close to one end of the bottom main board 11 away from the hinged position, and the free board 3 is closed, at the moment, the free board 3 plays a role in supporting, so that the temporary safety facility can be stably set by self gravity. After the bottom main board 11, the bottom auxiliary board 12, the supporting board 2 and the free board 3 are closed to form an irregular quadrilateral, the surface of the supporting board 2 deviating from the bottom auxiliary board 12 is inclined downwards towards the direction of the driving side, and referring to fig. 3, the whole surface of the supporting board 2 deviating from the bottom auxiliary board 12 can be seen from the driving side, the surface of the supporting board 2 deviating from the bottom auxiliary board 12 can be magnetically connected with a magnetic warning lamp, or traffic signs, traffic marks, warning banners and the like are drawn and set, the direction of drivers and passengers at the driving side is quite striking, a good warning effect can be achieved, and night travel is guaranteed.
The bottom surface mainboard 11 is close to fixedly connected with stopper (not shown in the figure) on the face of guide surface, and when bottom surface subplate 12 upwards rolls up to move the position of free board 3 to the bottom surface mainboard 11 when being close to on the face of guide plate, the stopper can effectively prevent free board 3 to keep away from the articulated department between bottom surface mainboard 11 and the bottom surface subplate 12 and slide, makes free board 3 be difficult for the roll-off bottom surface mainboard 11. The thickness of the limiting block can be 1-10mm, the thickness of the limiting block is 1mm in the embodiment of the present application, and other embodiments can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm and 10mm.
Referring to fig. 2 and 4, a spring 5 is fixedly connected between the surfaces of the support plate 2 and the free plate 3, which are close to each other, the spring 5 is always in a compressed state, when the temporary safety facility is not affected by external force, the force of the spring 5 acting on the free plate 3 makes the free plate 3 abut against the limiting block, and a balanced state is maintained through interaction force, when a vehicle scratches the free plate 3, the external force of the vehicle acting on the free plate 3 and the force direction of the spring 5 are opposite to each other, when the vehicle suddenly runs to the temporary safety facility and impacts the free plate 3, the free plate 3 moves along the hinge toward the direction close to the support plate 2, so that the distance between the surfaces of the support plate 2 and the free plate 3, which are close to each other, is shortened, the spring 5 is further compressed, and the force of the spring 5 acting on the free plate 3 is opposite to the impact force of the vehicle, so that the impact force of the vehicle part can be further relieved, the damage degree of the vehicle can be reduced, and the safety of drivers and passengers can be improved.
Referring to fig. 4 and 5, in the use state, the bottom main board 11, the bottom sub board 12, the support board 2 and the free board 3 are put to be closed and form a stable trapezoid, and when the temporary safety facility is slightly collided or scratched, the temporary safety facility can resist a certain impact force and cannot easily change the state, so that a better warning effect is maintained; when encountering the sudden situation that the vehicle bumps into temporary safety facility, the free board 3 of temporary safety facility receives comparatively violent striking, and free board 3 moves along the direction that articulated department is close to bearing plate 2, and bottom surface subplate 12 moves along the direction that articulated department is close to the ground simultaneously, and free board 3 collides with stiffening plate 4 and supports tight stiffening plate 4, and bottom surface subplate 12 empties to ground, and the vehicle front wheel falls at bottom surface board 1 face, makes frictional force increase through bottom surface board 1 and vehicle part dead weight, alleviates the impact force of vehicle greatly, reduces the damage degree of vehicle, improves the safety of driver and passenger.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (9)
1. A temporary security device, characterized by: the novel multifunctional support plate comprises a bottom plate (1), wherein the bottom plate (1) is fixedly connected with a support plate (2) which inclines towards one side where the bottom plate (1) is located, an included angle of 45-75 degrees is formed between the support plate (2) and the bottom plate (1), the support plate (2) is provided with a free plate (3), one end, far away from the support plate (2), of the free plate (3) is fixedly connected or abutted to the bottom plate (1), and the distance between one end, far away from the support plate (2), of the free plate (3) and one end, far away from the support plate (2), of the bottom plate (1) is greater than 0.5m; the bottom panel (1) is formed by hinging a bottom main board (11) and a bottom auxiliary board (12), the supporting board (2) is fixedly connected with the bottom auxiliary board (12), and the supporting board (2) is hinged with the free board (3).
2. A temporary security arrangement according to claim 1, characterized in that: one side of the bottom plate (1) close to the supporting plate (2) is fixedly connected with a stiffening plate (4), and one end, far away from the supporting plate (2), of the stiffening plate (4) is abutted to the free plate (3).
3. A temporary security arrangement according to claim 1, characterized in that: and one side of the free plate (3) far away from the supporting plate (2) is fixedly connected with a sponge layer, and the sponge layer completely covers the side surface of the free plate (3) far away from the supporting plate (2).
4. A temporary security arrangement according to claim 1, characterized in that: the temporary safety facilities all adopt steel plates.
5. A temporary security arrangement according to claim 1, characterized in that: the support plate (2) is provided with one or a combination of a plurality of warning lamps, traffic signs, traffic marks and warning banners on the surface, which is away from the bottom auxiliary plate (12).
6. A temporary security arrangement according to claim 1, characterized in that: the limiting block which is fixedly connected with the bottom panel (1) and used for preventing the free panel (3) from sliding towards the hinging prescription far away from the bottom main board (11) and the bottom auxiliary board (12).
7. A temporary security arrangement according to claim 1, characterized in that: a spring (5) is fixedly connected between the side surfaces of the supporting plate (2) and the free plate (3) which are close to each other, and the spring (5) is in a compressed or balanced state.
8. A temporary security arrangement according to claim 1, characterized in that: the end surface of the bottom plate (1) far away from the supporting plate (2) is a downward inclined guiding surface.
9. A temporary security arrangement according to claim 1, characterized in that: the side surface of the bottom plate (1) deviating from the supporting plate (2) is fixedly connected with anti-slip lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111676581.7A CN114351616B (en) | 2021-12-31 | 2021-12-31 | Temporary safety facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111676581.7A CN114351616B (en) | 2021-12-31 | 2021-12-31 | Temporary safety facility |
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| Publication Number | Publication Date |
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| CN114351616A CN114351616A (en) | 2022-04-15 |
| CN114351616B true CN114351616B (en) | 2023-05-26 |
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| CN202111676581.7A Active CN114351616B (en) | 2021-12-31 | 2021-12-31 | Temporary safety facility |
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| US9437109B1 (en) * | 2014-06-24 | 2016-09-06 | Joseph V. Stafford | Emergency safety marker system |
| CN211898404U (en) * | 2020-03-05 | 2020-11-10 | 杨艳岗 | Road pit safety device |
| CN111927203A (en) * | 2020-08-11 | 2020-11-13 | 中发腾龙建设有限公司 | Town road construction envelope |
| CN212506010U (en) * | 2020-06-18 | 2021-02-09 | 候大敏 | Highway construction safety device |
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| JP2013221274A (en) * | 2012-04-13 | 2013-10-28 | Hanai Co Ltd | Device for forcibly stopping vehicle |
| EP3447194A1 (en) * | 2017-08-22 | 2019-02-27 | Joerg Jaster | Traversable anti terror barrier |
| IT201800002198A1 (en) * | 2018-01-30 | 2019-07-30 | Graziano Mucciarini | ANTI-INTRUSION BARRIER |
| CN208486195U (en) * | 2018-07-06 | 2019-02-12 | 周小宾 | A kind of road construction temporary-warning safety equipment |
| CN211773037U (en) * | 2020-03-27 | 2020-10-27 | 中国市政工程华北设计研究总院有限公司 | Municipal construction road warning sign |
| CN212223690U (en) * | 2020-04-15 | 2020-12-25 | 常熟理工学院 | An anti-collision elevator door stopper for fourth-generation buildings |
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2021
- 2021-12-31 CN CN202111676581.7A patent/CN114351616B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9437109B1 (en) * | 2014-06-24 | 2016-09-06 | Joseph V. Stafford | Emergency safety marker system |
| CN211898404U (en) * | 2020-03-05 | 2020-11-10 | 杨艳岗 | Road pit safety device |
| CN212506010U (en) * | 2020-06-18 | 2021-02-09 | 候大敏 | Highway construction safety device |
| CN111927203A (en) * | 2020-08-11 | 2020-11-13 | 中发腾龙建设有限公司 | Town road construction envelope |
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| CN114351616A (en) | 2022-04-15 |
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