CN111236110A - Road guardrail device and mounting method - Google Patents
Road guardrail device and mounting method Download PDFInfo
- Publication number
- CN111236110A CN111236110A CN202010028894.0A CN202010028894A CN111236110A CN 111236110 A CN111236110 A CN 111236110A CN 202010028894 A CN202010028894 A CN 202010028894A CN 111236110 A CN111236110 A CN 111236110A
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- Prior art keywords
- plate
- protective layer
- metal fixing
- driving motor
- road
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Classifications
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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
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
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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
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/658—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing
- E01F9/669—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for fastening to safety barriers or the like
Abstract
The invention discloses a highway guardrail device and an installation method, wherein the device comprises: the bottom of the upright post extends into the ground; the guardrail comprises a metal fixing plate arranged in a wave shape, a flexible buffer cushion layer arranged outside the metal fixing plate and a protection mechanism arranged outside the buffer cushion layer; the metal fixing plate is fixedly connected to the top end of the upright post; the protection mechanism includes: a protective layer which is a hard plate body arranged outside the cushion layer; the driving motor is arranged below the metal fixing plate, and an output shaft of the driving motor is connected to the protective layer; the control module is connected with the driving motor; the control module controls the driving motor to drive the protective layer to switch outside or below the cushion pad according to the traffic flow and weather data acquired by the existing road traffic system and weather forecast system. It has both guaranteed that guardrail device has sufficient intensity, and the dynamic shear force that can furthest reduction collision vehicle received to passenger's safety in the vehicle has been protected.
Description
Technical Field
The invention relates to the technical field of road construction devices, in particular to a road guardrail device and an installation method.
Background
With the great increase of the automobile keeping quantity in the world year by year, the incidence rate of traffic accidents also tends to rise year by year, and safe driving becomes a concern of people all the time. Especially, for the automobile running on the expressway, the anti-collision guardrails on the two sides of the expressway can effectively prevent the automobile from rushing out of the guardrails when safety accidents happen due to the fact that the automobile runs at a high speed, and personal safety is guaranteed. The existing highway guardrails are mainly divided into rigid concrete guardrails, semi-rigid waveform guardrails and flexible cable guardrails. From the structural and safety performance point of view, the existing highway guardrail mainly has the following defects: although the concrete guardrail wall-type structure can basically prevent large and heavy vehicles from crossing the guardrail and can effectively prevent small vehicles from drilling out the guardrail, the concrete has small deformation when bearing external load, so that the kinetic energy of the vehicles absorbed by the guardrail in the collision process is little, and the dynamic shearing force borne by the collided vehicles is very large, thereby easily causing the serious damage of the vehicles and even causing the injuries and deaths of passengers in the vehicles; although the semi-rigid waveform guardrail has good comprehensive mechanical property and has better resisting and guiding effects on common vehicle collision accidents, the strength of the waveform guardrail is not large enough, and high-speed vehicles with large mass cannot be effectively intercepted; the flexible cable guardrail has small contact area with a vehicle in the collision process, and limited absorbed energy, and only has good intercepting and guiding effects on the collision of a car.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
It is a further object of the present invention to provide a road barrier device that ensures sufficient strength of the barrier device and minimizes dynamic shear forces on the impacting vehicle to maximize the safety of occupants within the vehicle.
In order to achieve the above objects and other objects, the present invention adopts the following technical solutions:
a road barrier device comprising:
the upright columns are uniformly arranged on two sides of the highway along the extending direction of the highway at intervals and are positioned between opposite lanes in the middle of the highway; the bottom of the upright post extends into the ground and is fixed on the ground through a mounting plate arranged on the side wall of the upright post;
the guardrail comprises a metal fixing plate arranged in a wave shape, a flexible buffer cushion layer arranged outside the metal fixing plate and a protection mechanism arranged outside the buffer cushion layer; the metal fixing plate is fixedly connected to the top end of the upright column to form a separation plate intercepted on two sides of a highway and on the central axis of the highway; the buffer cushion layers are respectively arranged on the surfaces, facing the highway, of the metal fixing plates positioned on the two sides of the highway and the surfaces of the two sides of the metal fixing plates positioned between opposite lanes in the middle of the highway; the surface of the buffer cushion layer connected with the metal fixing plate is in a wave shape matched with the shape of the metal fixing plate; the opposite surface of the buffer cushion layer connected with the metal fixing plate is a plane;
the protection mechanism includes:
a protective layer which is a hard plate body arranged outside the cushion layer;
the driving motor is arranged below the metal fixing plate, and an output shaft of the driving motor is connected to the protective layer;
the control module is respectively connected with the driving motor, an existing road traffic system and a weather forecast system; the control module controls the driving motor to drive the protective layer to switch outside or below the cushion pad according to traffic flow data and weather data acquired by the road traffic system and the weather forecast system;
the specific control mode is as follows:
the control module controls the driving motor to drive the protective layer to move downwards to the lower part of the cushion layer under any one of the following conditions;
the traffic flow data in the controller control section acquired by the road traffic system is larger than a preset traffic flow threshold;
the weather data in the controller control section acquired by the weather forecast system is rain, snow or visibility lower than a preset visibility threshold;
the control module controls the driving motor to drive the protective layer to be restored to the outside of the cushion layer when all the following conditions are met;
the traffic flow data in the controller control section acquired by the road traffic system is smaller than a preset traffic flow threshold; and
and the weather data in the controller control road section acquired by the weather forecast system is clear, and the visibility is higher than the visibility threshold.
Preferably, in the road barrier device, the mounting plate is a square plate body which is arranged around the side wall of the upright post and horizontally extends along the direction vertical to the side wall of the upright post; the mounting plate is provided with a mounting hole penetrating through the mounting plate; the mounting plate is connected with the ground through bolting between the bolts and the mounting holes.
Preferably, in the road barrier device, the protective layer is composed of a top plate and a face plate; the top plate is hinged along the edge of the panel in a manner of rotating between 90-180 degrees; the opposite end of the panel, which is connected with the top plate, is connected with the driving motor; when the included angle between the top plate and the panel is 90 degrees, the top plate and the panel respectively cover the top surface of the cushion pad layer and the surface facing the road; when the included angle of roof and panel is 180, roof and panel are constituteed and are located the vertical plate body of cushion bed below.
Preferably, in the road barrier device, a waterproof flexible connecting sheet is arranged at the joint of the top plate and the face plate, and two ends of the waterproof flexible connecting sheet are respectively connected to the top plate and the face plate.
Preferably, the road barrier device further includes:
the air pump is arranged inside the upright post and is connected to the control module;
the warning cushion layer comprises an elastic supporting plate arranged between the buffer cushion layer and the protective layer and a warning air bag arranged perpendicular to the surface of the elastic supporting plate; the warning airbags are uniformly arranged on the elastic supporting plate and extend towards the direction of the road; the protective layer and the warning air bag are matched, a through hole is formed in the position, on the protective layer, of the warning air bag, the warning air bag is connected with the air pump through a pipeline, stretches/contracts in the length direction along with the inflation/deflation of the air pump, and penetrates to the outer portion of the protective layer through the through hole in the inflation state.
Preferably, the road guardrail device further comprises a distance measuring module connected to the control module; the distance measuring module is arranged at a position close to the top end of the upright post and is arranged towards the direction of the road; the distance measuring module triggers the control module to control the air pump to inflate the warning airbag when detecting that the distance between the running vehicle and the stand columns is smaller than a preset distance threshold value.
A method of installing a highway barrier device comprising the steps of:
s1, mounting the upright post along the extending direction of the road according to the mounting plan;
s2, installing an air pump in the upright post, and extending a pipeline connected with the air pump out of the upright post through a hole arranged near the top end of the upright post;
s3, mounting a distance detection module on the upright column, and connecting the distance detection module with the control module;
s4, welding a metal fixing plate at the top end of the upright post, and installing a cushion layer on the metal fixing plate;
s5, installing an elastic support plate outside the cushion layer, and connecting the warning air bag on the elastic support plate with the pipeline;
s6, mounting a protective layer outside the elastic support plate, and mounting a driving motor below the protective layer;
and S7, connecting the driving motor and the air pump with the control module respectively.
The invention at least comprises the following beneficial effects:
in the road guardrail device, the upright posts partially extending into the ground are arranged, so that the connection tightness between the guardrail and the ground is improved, the guardrail strength is higher, and the risks of damage to the guardrail and vehicle re-emergence from a road caused by vehicle impact are reduced.
Through the setting of the outside cushion layer of wavy metal fixed plate and metal fixed plate, make the guardrail outward appearance be ordinary guardrail form, but metal fixed plate's setting can increase the intensity of guardrail on the one hand, effectually avoid the vehicle to cause the guardrail damage, on the other hand can increase the thickness of cushion layer, thereby make the guardrail strengthen when receiving the external load effect deformation range, can absorb more kinetic energy of vehicle by the guardrail when vehicle collision guardrail promptly, with the dynamic shear force that reduces the collision vehicle and receive, and then reduced the damage that vehicle striking guardrail caused, passenger's safety in the car has been protected.
Through the setting of the protection mechanism who comprises protective layer and driving motor for the protective layer can protect the cushion layer of inlayer when the occurence of failure probability is less, and then avoids flexible cushion layer to expose for a long time in external environment, the ageing and the damage that cause, thereby has prolonged the life of highway guardrail device.
The road guardrail device is simple in installation method and easy to construct, and the manufactured guardrail device is high in strength, can protect colliding vehicles to the maximum extent, and improves driving safety.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view of a highway barrier device provided by the present invention;
FIG. 2 is a cross-sectional side view of a road barrier device provided by the present invention;
fig. 3 is a structural view of a protective layer provided by the present invention.
Detailed Description
The present invention is described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.
As shown in fig. 1 and 2, a road barrier device includes: the upright posts 1 are uniformly arranged on two sides of the highway along the extending direction of the highway at intervals and are positioned between opposite lanes in the middle of the highway; the bottom of the upright post 1 extends into the ground below and is fixed on the ground 3 through a mounting plate 2 arranged on the side wall of the upright post 1.
The guardrail comprises a metal fixing plate 4 arranged in a wave shape, a flexible cushion layer 5 arranged outside the metal fixing plate 4 and a protection mechanism arranged outside the cushion layer 5; the metal fixing plate 4 is fixedly connected to the top end of the upright post 1 to form a separation plate intercepted on two sides of a highway and on the central axis of the highway; the buffer cushion layers 5 are respectively arranged on the surfaces, facing the highway, of the metal fixing plates 4 positioned on the two sides of the highway and the surfaces on the two sides of the metal fixing plates 4 positioned between opposite lanes in the middle of the highway; the surface of the buffer cushion layer 5 connected with the metal fixing plate 4 is set to be wave-shaped matched with the shape of the metal fixing plate 4; the opposite surface of the buffer cushion layer 5 connected with the metal fixing plate 4 is set to be a plane.
The protection mechanism includes:
and a protective layer 6 which is a hard plate provided outside the cushion layer 5.
And the driving motor 7 is arranged below the metal fixing plate 4, and an output shaft of the driving motor 7 is connected to the protective layer.
The control module is respectively connected with the driving motor 7, an existing road traffic system and a weather forecast system; the control module controls the driving motor 7 to drive the protective layer 6 to switch between the outside or the lower part of the cushion 5 according to the traffic flow data and the weather data acquired by the road traffic system and the weather forecast system.
The specific control mode is as follows:
the control module controls the driving motor 7 to drive the protective layer 6 to move downwards to the lower part of the cushion layer 5 under any condition;
the traffic flow data in the controller control section acquired by the road traffic system is larger than a preset traffic flow threshold;
the weather data in the controller control section acquired by the weather forecast system is rain, snow or visibility lower than a preset visibility threshold;
the control module controls the driving motor 7 to drive the protective layer 6 to be restored to the outside of the cushion layer 5 when all the following conditions are met;
the traffic flow data in the controller control section acquired by the road traffic system is smaller than a preset traffic flow threshold; and
and the weather data in the controller control road section acquired by the weather forecast system is clear, and the visibility is higher than the visibility threshold.
In the above scheme, the working process of the road guardrail device is as follows: when the vehicle runs on a highway, the control module acquires data from a highway traffic system and a weather forecast system in real time, and controls the driving motor to move the protective layer down to the lower part of the cushion layer when judging that the influence of weather or traffic flow on the running is large, namely the probability of traffic accidents is large, so that the cushion layer is exposed, and the kinetic energy of the vehicle can be reduced as much as possible when the accidents happen; when the condition that the traffic flow is less and the weather is better, namely the traffic accident probability is lower is judged, the driving motor is controlled to move the protective layer to the front of the cushion layer, and then the cushion layer is protected, so that the aging and the damage caused by the long-term exposure of the cushion layer are reduced.
Through the setting that the part stretches into the stand in the ground, the fastening nature that guardrail and ground are connected has been increaseed, and then makes guardrail intensity higher, reduces because of the guardrail damage that the vehicle striking caused, the risk that the vehicle reexpowed the highway.
Through the setting of the outside cushion layer of wavy metal fixed plate and metal fixed plate, make the guardrail outward appearance be ordinary guardrail form, but metal fixed plate's setting can increase the intensity of guardrail on the one hand, effectually avoid the vehicle to cause the guardrail damage, on the other hand can increase the thickness of cushion layer, thereby make the guardrail strengthen when receiving the external load effect deformation range, can absorb more kinetic energy of vehicle by the guardrail when vehicle collision guardrail promptly, with the dynamic shear force that reduces the collision vehicle and receive, and then reduced the damage that vehicle striking guardrail caused, passenger's safety in the car has been protected.
Through the setting of the protection mechanism who comprises protective layer and driving motor for the protective layer can protect the cushion layer of inlayer when the occurence of failure probability is less, and then avoids flexible cushion layer to expose for a long time in external environment, the ageing and the damage that cause, thereby has prolonged the life of highway guardrail device.
In a preferred scheme, the mounting plate 2 is a square plate body which is arranged around the side wall of the upright post 1 and horizontally extends along the direction vertical to the side wall of the upright post 1; the mounting plate 2 is provided with a mounting hole penetrating through the mounting plate 2; the mounting plate 2 is connected with the ground 3 through bolting between the bolts 8 and the mounting holes.
In the above scheme, through the setting of mounting panel on the stand for the stand is more firm and convenient with being connected on ground, and through the setting of mounting panel, can guarantee that each stand is impartial in length outside ground, and then has made things convenient for guardrail device's installation.
As shown in fig. 3, in a preferred embodiment, the protective layer 6 is composed of a top plate 9 and a face plate 10; the top plate 9 is hinged in such a way as to be rotatable along the edge of the panel 10 between 90 and 180 °; the opposite end of the panel 10 connected with the top plate 9 is connected with the driving motor 6; when the included angle between the top plate 9 and the panel 10 is 90 degrees, the top plate 9 and the panel 10 respectively cover the top surface of the cushion pad layer 5 and the surface facing the road; when the included angle of the top plate 9 and the panel 10 is 180 degrees, the top plate 9 and the panel 10 form a vertical plate body positioned below the cushion layer 5.
In the above scheme, constitute by roof and panel through setting up the protective layer for the protective layer can all protect the top and the surface of cushion layer.
In a preferred scheme, a waterproof flexible connecting sheet 11 is arranged at the joint of the top plate 9 and the panel 10, and two ends of the waterproof flexible connecting sheet are respectively connected to the top plate 9 and the panel 10.
In above-mentioned scheme, through the setting of waterproof flexible connection piece, avoided rainwater dust etc. to get into inside the protective layer by the seam of roof and panel.
In a preferred embodiment, the method further comprises:
an air pump 12 disposed inside the column;
the warning cushion comprises an elastic support plate 13 arranged between the cushion layer 5 and the protective layer 6, and a warning air bag 14 arranged perpendicular to the surface of the elastic support plate 13; the warning airbags 14 are uniformly arranged on the elastic supporting plate 13 and extend towards the road direction; the protective layer 6 is provided with a through hole 15 at a position adapted to the warning airbag 14, the warning airbag 14 is connected with the air pump 12 through a pipeline, extends/contracts in the length direction along with the inflation/deflation of the air pump 12, and penetrates to the outside of the protective layer 6 through the through hole 15 in an inflation state.
In the above scheme, through the setting of warning bed course and air pump for the warning gasbag can protrusion in the guardrail outside when gas filled state, and then plays the warning effect to the vehicle that is comparatively close to the guardrail, keeps safe distance with the guardrail in order to remind it.
In a preferred scheme, the device further comprises a distance measuring module connected to the control module; the distance measuring module is arranged at a position close to the top end of the upright post 1 and is arranged towards the direction of the road; when the distance measuring module detects that the distance between the running vehicle and the upright post 1 is smaller than a preset distance threshold value, the control module is triggered to control the air pump 12 to inflate the warning air bag 14.
In the above scheme, the distance between the running vehicle and the guardrail can be monitored in real time by the guardrail through the distance measuring module connected to the control module, and when the distance between the vehicle and the guardrail is easy to scratch, the air pump is controlled to inflate the warning airbag, so that the driver is reminded through the warning airbag, the driver can run to keep a safe distance with the guardrail as soon as possible, and the running safety is further improved.
A method of installing a highway barrier device comprising the steps of:
s1, mounting the upright post along the extending direction of the road according to the mounting plan;
s2, installing an air pump in the upright post, and extending a pipeline connected with the air pump out of the upright post through a hole arranged near the top end of the upright post;
s3, mounting a distance detection module on the upright column, and connecting the distance detection module with the control module;
s4, welding a metal fixing plate at the top end of the upright post, and installing a cushion layer on the metal fixing plate;
s5, installing an elastic support plate outside the cushion layer, and connecting the warning air bag on the elastic support plate with the pipeline;
s6, mounting a protective layer outside the elastic support plate, and mounting a driving motor below the protective layer;
and S7, connecting the driving motor and the air pump with the control module respectively.
In the scheme, the installation method of the road guardrail device is simple and easy to implement, and the manufactured guardrail device is high in strength, can protect colliding vehicles to the maximum extent, and improves the driving safety.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. A road barrier device, comprising:
the upright columns are uniformly arranged on two sides of the highway along the extending direction of the highway at intervals and are positioned between opposite lanes in the middle of the highway; the bottom of the upright post extends into the ground and is fixed on the ground through a mounting plate arranged on the side wall of the upright post;
the guardrail comprises a metal fixing plate arranged in a wave shape, a flexible buffer cushion layer arranged outside the metal fixing plate and a protection mechanism arranged outside the buffer cushion layer; the metal fixing plate is fixedly connected to the top end of the upright column to form a separation plate intercepted on two sides of a highway and on the central axis of the highway; the buffer cushion layers are respectively arranged on the surfaces, facing the highway, of the metal fixing plates positioned on the two sides of the highway and the surfaces of the two sides of the metal fixing plates positioned between opposite lanes in the middle of the highway; the surface of the buffer cushion layer connected with the metal fixing plate is in a wave shape matched with the shape of the metal fixing plate; the opposite surface of the buffer cushion layer connected with the metal fixing plate is a plane;
the protection mechanism includes:
a protective layer which is a hard plate body arranged outside the cushion layer;
the driving motor is arranged below the metal fixing plate, and an output shaft of the driving motor is connected to the protective layer;
the control module is respectively connected with the driving motor, an existing road traffic system and a weather forecast system; the control module controls the driving motor to drive the protective layer to switch outside or below the cushion pad according to traffic flow data and weather data acquired by the road traffic system and the weather forecast system;
the specific control mode is as follows:
the control module controls the driving motor to drive the protective layer to move downwards to the lower part of the cushion layer under any one of the following conditions;
the traffic flow data in the controller control section acquired by the road traffic system is larger than a preset traffic flow threshold;
the weather data in the controller control section acquired by the weather forecast system is rain, snow or visibility lower than a preset visibility threshold;
the control module controls the driving motor to drive the protective layer to be restored to the outside of the cushion layer when all the following conditions are met;
the traffic flow data in the controller control section acquired by the road traffic system is smaller than a preset traffic flow threshold; and
and the weather data in the controller control road section acquired by the weather forecast system is clear, and the visibility is higher than the visibility threshold.
2. The highway barrier device of claim 1 wherein said mounting plate is a square plate disposed around said post sidewall and extending horizontally in a direction perpendicular to said post sidewall; the mounting plate is provided with a mounting hole penetrating through the mounting plate; the mounting plate is connected with the ground through bolting between the bolts and the mounting holes.
3. The road barrier device of claim 1, wherein the protective layer is comprised of a top plate and a face plate; the top plate is hinged along the edge of the panel in a manner of rotating between 90-180 degrees; the opposite end of the panel, which is connected with the top plate, is connected with the driving motor; when the included angle between the top plate and the panel is 90 degrees, the top plate and the panel respectively cover the top surface of the cushion pad layer and the surface facing the road; when the included angle of roof and panel is 180, roof and panel are constituteed and are located the vertical plate body of cushion bed below.
4. A road barrier device according to claim 3 wherein the junction of the top plate and face plate is provided with a waterproof flexible web having two ends connected to the top plate and face plate respectively.
5. The road barrier device of claim 1, further comprising:
the air pump is arranged inside the upright post and is connected to the control module;
the warning cushion layer comprises an elastic supporting plate arranged between the buffer cushion layer and the protective layer and a warning air bag arranged perpendicular to the surface of the elastic supporting plate; the warning airbags are uniformly arranged on the elastic supporting plate and extend towards the direction of the road; the protective layer and the warning air bag are matched, a through hole is formed in the position, on the protective layer, of the warning air bag, the warning air bag is connected with the air pump through a pipeline, stretches/contracts in the length direction along with the inflation/deflation of the air pump, and penetrates to the outer portion of the protective layer through the through hole in the inflation state.
6. The highway barrier device of claim 5 further comprising a distance measuring module coupled to the control module; the distance measuring module is arranged at a position close to the top end of the upright post and is arranged towards the direction of the road; the distance measuring module triggers the control module to control the air pump to inflate the warning airbag when detecting that the distance between the running vehicle and the stand columns is smaller than a preset distance threshold value.
7. A method of installing a highway barrier device comprising the steps of:
s1, mounting the upright post along the extending direction of the road according to the mounting plan;
s2, installing an air pump in the upright post, and extending a pipeline connected with the air pump out of the upright post through a hole arranged near the top end of the upright post;
s3, mounting a distance detection module on the upright column, and connecting the distance detection module with the control module;
s4, welding a metal fixing plate at the top end of the upright post, and installing a cushion layer on the metal fixing plate;
s5, installing an elastic support plate outside the cushion layer, and connecting the warning air bag on the elastic support plate with the pipeline;
s6, mounting a protective layer outside the elastic support plate, and mounting a driving motor below the protective layer;
and S7, connecting the driving motor and the air pump with the control module respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010028894.0A CN111236110A (en) | 2020-01-12 | 2020-01-12 | Road guardrail device and mounting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010028894.0A CN111236110A (en) | 2020-01-12 | 2020-01-12 | Road guardrail device and mounting method |
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| CN111236110A true CN111236110A (en) | 2020-06-05 |
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| CN202010028894.0A Pending CN111236110A (en) | 2020-01-12 | 2020-01-12 | Road guardrail device and mounting method |
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| CN113026614A (en) * | 2021-04-09 | 2021-06-25 | 义乌市花龄贸易有限公司 | Lifting column for protecting pedestrians |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113026614A (en) * | 2021-04-09 | 2021-06-25 | 义乌市花龄贸易有限公司 | Lifting column for protecting pedestrians |
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Application publication date: 20200605 |