A piezoresistive low variable mobile guardrail

Abstract

The application belongs to the technical field of road guardrails, and particularly relates to a piezoresistive low-variable movable guardrail. The piezoresistive low-variable movable guardrail comprises a piezoresistive base, a counterweight connected with the piezoresistive base and used for applying weight pressure to the piezoresistive base, and the counterweight is provided with a mounting hole through which an old guardrail stand column passes to connect the piezoresistive base. The piezoresistive low-variable movable guardrail of the application keeps the piezoresistive base adsorbed on the road surface through the continuous gravity pressure applied by the counterweight, effectively inhibits the lateral displacement of the guardrail when colliding, and directly uses the existing stand column of the waste old two-wave beam guardrail for positioning and installation through the mounting hole, so that the structural damage of the traditional steel nail anchoring to the asphalt pavement is avoided, the maintenance cost is reduced, the recycling of waste materials is realized, and the resource waste is greatly reduced.

Description

[Technical Field]

[0001] This application belongs to the field of road guardrail technology, specifically relating to a piezoresistive low-variability movable guardrail. [Background Technology]

[0002] In the field of highway reconstruction and expansion projects, with the surge in traffic volume and aging road infrastructure, traditional construction zone isolation and protection facilities face severe challenges. Early methods such as water-filled barriers, traffic cones, and concrete blocks lacked effective protective capabilities. Although movable steel guardrails have gradually evolved, they still have significant drawbacks: during actual vehicle collisions, the lateral dynamic displacement of the guardrails generally exceeds 2 meters, easily triggering secondary collisions in oncoming lanes; simultaneously, steel nail anchoring methods damage the asphalt pavement structure, increasing the difficulty of later maintenance. Furthermore, a large number of discarded two-wave beam guardrails from reconstruction and expansion projects are difficult to recycle due to post corrosion, resulting in resource waste. [Utility Model Content]

[0003] To address the problems in existing technologies where a large number of discarded double-wave beam guardrails are difficult to recycle due to post corrosion and where steel nail anchoring methods damage the asphalt pavement structure, this application provides a piezoresistive low-variable movable guardrail.

[0004] This application is achieved through the following technical solution:

[0005] A piezoresistive low-variability movable guardrail includes a piezoresistive base and a counterweight block connected to the piezoresistive base and used to apply weight pressure to the piezoresistive base. The counterweight block is provided with mounting holes through which old guardrail posts pass to connect to the piezoresistive base.

[0006] As described above, a piezoresistive low-variable moving guardrail includes a base body and a flexible sealing gasket disposed along the outer contour of the bottom of the base body. The counterweight presses the piezoresistive base down to create a negative pressure difference between the inner and outer sides of the piezoresistive base.

[0007] As described above, in a piezoresistive low-variability moving guardrail, the piezoresistive base is provided with an air nozzle that communicates with the interior of the piezoresistive base and is used for evacuation.

[0008] As described above, a piezoresistive low-variability moving guardrail has an elastic pin device at the bottom of the piezoresistive base. The elastic pin device includes an elastic element, a mounting groove for the elastic element, and a pin that abuts against the elastic element. The elastic element drives the pin to extend out from under the piezoresistive base.

[0009] As described above, a piezoresistive low-variable moving guardrail has a first inclined surface and a second inclined surface that gradually extend outward from top to bottom along the width direction of the counterweight block in opposite directions.

[0010] As described above, in a piezoresistive low-variability moving guardrail, the counterweight has a first connector and a second connector at both ends, the first connector and the second connector are offset in the vertical direction, the first connector has a first positioning hole for the connecting pin to pass through, and the second connector has a second positioning hole for the connecting pin to pass through.

[0011] As described above, a piezoresistive low-variability moving guardrail further includes a connector for connecting two adjacent old guardrails. The old guardrails are provided with a first connecting hole, and the connector is provided with a second connecting hole and a third connecting hole respectively corresponding to the first connecting hole on the two adjacent old guardrails. Fasteners pass through the first connecting hole and the second connecting hole to fix the connector to the old guardrail, and fasteners pass through the first connecting hole and the third connecting hole to fix the connector to another old guardrail.

[0012] As described above, in a piezoresistive low-variability moving guardrail, the connector is further provided with a third positioning hole through which the connecting pin passes, and the first positioning hole, the second positioning hole and the third positioning hole coincide and correspond to each other in the vertical direction.

[0013] As described above, in a piezoresistive low-variability moving guardrail, at least two piezoresistive bases are connected to the counterweight block.

[0014] As described above, in a piezoresistive low-variability moving guardrail, the bottom of the base body is provided with four elastic pin devices, each of which is located in the inner corner area where adjacent sides of the base body meet.

[0015] Compared with the prior art, this application has the following advantages:

[0016] This application discloses a piezoresistive low-variability movable guardrail, which uses the continuous gravitational pressure applied by the counterweight to keep the piezoresistive base adhering to the road surface, effectively suppressing the lateral displacement of the guardrail during collisions; and by setting installation holes, it can directly utilize the existing posts of the scrap double-wave beam guardrail for positioning and installation, avoiding the structural damage to the asphalt pavement caused by traditional steel nail anchoring, reducing maintenance costs, and realizing the recycling of waste materials, thus greatly reducing resource waste. [Attached Image Description]

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1It is a three-dimensional representation in the embodiments of this application. Figure 1 ;

[0019] Figure 2 yes Figure 1 A partially exploded view;

[0020] Figure 3 It is a three-dimensional representation in the embodiments of this application. Figure 2 ;

[0021] Figure 4 This is a three-dimensional perspective view of the piezoresistive base in the embodiments of this application;

[0022] Figure 5 yes Figure 1 Top view;

[0023] Figure 6 This is a schematic diagram of the splicing and installation of two guardrails according to an embodiment of this application.

Detailed Implementation Methods

[0024] To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0025] Please see Figures 1 to 6 A piezoresistive low-variability moving guardrail includes a piezoresistive base 1 and a counterweight 2 connected to the piezoresistive base 1 and used to apply weight pressure to the piezoresistive base 1. The counterweight 2 is provided with mounting holes 4 through which old guardrail posts 3 pass to connect to the piezoresistive base 1.

[0026] This application discloses a piezoresistive low-variability movable guardrail, which uses the continuous gravitational pressure applied by the counterweight to keep the piezoresistive base adhering to the road surface, effectively suppressing the lateral displacement of the guardrail during collisions; and by setting installation holes, it can directly utilize the existing posts of the scrap double-wave beam guardrail for positioning and installation, avoiding the structural damage to the asphalt pavement caused by traditional steel nail anchoring, reducing maintenance costs, and realizing the recycling of waste materials, thus greatly reducing resource waste.

[0027] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the piezoresistive base 1 includes a base body 11 and a flexible sealing gasket 12 disposed along the outer contour of the bottom of the base body 11. The counterweight 2 presses the piezoresistive base 1 down to press down the flexible sealing gasket 12 to form a negative pressure difference between the inner and outer sides of the piezoresistive base 1.

[0028] In this embodiment, the counterweight 2 applies continuous pressure to the pressure-resistance base 1, causing the flexible sealing pad 12 at the bottom of the base body 11 to tightly adhere to the road surface and form a sealed space. Atmospheric pressure is used to achieve stable adsorption without anchoring. At the same time, the flexible sealing pad 12 can both enhance the frictional resistance with the road surface and act as a buffer layer to absorb impact energy during collision. The dual effect significantly reduces the lateral displacement of the guardrail, with a measured value of <0.5 meters. Negative pressure adsorption provides basic fixing force, the gravity pressure of the counterweight 2 enhances the sealing performance, and the elastic deformation of the flexible sealing pad 12 not only compensates for the unevenness of the road surface to ensure airtightness, but also reduces the impact of collision by dissipating energy through deformation. The three work together to achieve dynamic and stable protection. The flexible sealing pad 12 can be made of rubber, such as nitrile rubber, neoprene rubber, silicone rubber, polyurethane elastomer, or thermoplastic elastomer (TPE / TPU).

[0029] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the piezoresistive base 1 is provided with an air nozzle 13 that communicates with the interior of the piezoresistive base 1 and is used for evacuation.

[0030] In this embodiment, by setting an air nozzle 13 on the piezoresistive base 1, a rapid vacuuming operation is achieved in the internal space of the base, creating a stable negative pressure difference between the inner and outer sides of the base. The atmospheric pressure generates a strong adsorption and fixing force, avoiding the damage to the road surface caused by traditional anchoring methods. It also allows for convenient disassembly by quickly releasing the vacuum through the air nozzle 13 after construction. The air nozzle 13 serves as a vacuum channel connected to an external air extraction device. After vacuuming, a negative pressure environment of 0.05-0.08 MPa is formed inside the base. Combined with the sealing effect of the flexible sealing gasket 12, an adsorption force of approximately 500-800 kg per square meter can be generated. This force is evenly distributed across the entire contact surface of the base, ensuring the overall stability of the guardrail when subjected to lateral impact.

[0031] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the bottom of the piezoresistive base 1 is provided with an elastic ejector device 14. The elastic ejector device 14 includes an elastic element 141, a mounting groove 142 for the elastic element 141, and an ejector pin 143 that abuts against the elastic element 141. The elastic element 141 drives the ejector pin 143 to extend out from below the piezoresistive base 1.

[0032] In this embodiment, the contact stability between the piezoresistive base and the ground is enhanced by the elastic pin device. Especially on uneven ground, the pin can embed into tiny depressions or gaps in the ground, further increasing the friction between the base and the ground. This effectively prevents the piezoresistive base from sliding or shifting when subjected to external impact, significantly improving the stability and anti-collision performance of the guardrail. The elastic potential energy of the elastic element 141 pushes the pin 143 to extend. After contacting the ground, the pin increases the pressure at the contact point with the ground through its tip structure, thereby improving friction and stability. The elastic element 141 is a spring.

[0033] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the piezoresistive base 1 is provided with a first inclined surface 5 and a second inclined surface 6 that gradually extend outward in opposite directions from top to bottom along the width direction of the counterweight block 2.

[0034] In this embodiment, a triangular structure can be formed. Utilizing the stability principle of a triangle, the overall stability of the piezoresistive base is significantly enhanced when subjected to external impacts. The triangular structure possesses natural stability, effectively dispersing and offsetting impact forces from different directions, thereby reducing the possibility of the piezoresistive base tipping over or shifting under collision or lateral force, further improving the safety and reliability of the guardrail. External forces are distributed to various parts of the piezoresistive base, while the weight of the counterweight further enhances the contact stability between the base and the ground, ensuring the guardrail remains stable even in complex traffic environments.

[0035] Furthermore, as a preferred embodiment of this solution and not a limitation, the counterweight 2 is provided with a first connector 7 and a second connector 8 at both ends, the first connector 7 and the second connector 8 are offset in the vertical direction, the first connector 7 is provided with a first positioning hole 10 for the connecting pin 9 to pass through, and the second connector 8 is provided with a second positioning hole 101 for the connecting pin 9 to pass through.

[0036] In this embodiment, the staggered joints and positioning holes enable reliable connection and coordinated force sharing among multiple counterweights, thereby enhancing the integrity and stability of the entire guardrail system. The shear resistance of the metal pins (shear strength of 45# steel pins ≥300MPa) effectively disperses the impact energy. Actual measurements show that this structure can reduce the displacement at the joint by more than 60%.

[0037] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a connector 16 for connecting two adjacent old guardrails 15. The old guardrails 15 are provided with a first connecting hole 17, and the connector 16 is provided with a second connecting hole 18 and a third connecting hole 181 respectively corresponding to the first connecting hole 17 on the two adjacent old guardrails 15. Fasteners pass through the first connecting hole 17 and the second connecting hole 18 to fix the connector 16 to the old guardrail 15, and fasteners pass through the first connecting hole 17 and the third connecting hole 181 to fix the connector 16 to another old guardrail 15.

[0038] In this embodiment, a reliable connection structure enhances the stability and protective performance of the overall guardrail, preventing loosening at the connection points that could lead to overall deformation or excessive displacement. This not only improves the tensile and shear resistance of the entire device but also ensures coordinated force distribution among the individual guardrail sections 15 through multi-point fixing, thus more effectively suppressing overall deformation of the guardrail during a collision. This solves the problem of loosening and deformation that easily occurs with traditional connection methods during collisions.

[0039] Furthermore, as a preferred embodiment of this solution and not a limitation, the connector 16 is also provided with a third positioning hole 102 for the connecting pin 9 to pass through, and the first positioning hole 10, the second positioning hole 101 and the third positioning hole 102 coincide and correspond to each other in the vertical direction.

[0040] In this embodiment, multi-point fixing enhances the reliability and stability of the overall connection, preventing loosening at the connection points that could lead to overall deformation or excessive displacement of the guardrail. The design of the connecting pin 9 passing through multiple positioning holes not only improves the tensile and shear resistance of the overall device, but also ensures coordinated force distribution among the existing guardrails 15 through multi-point fixing, thereby more effectively suppressing the overall deformation of the guardrail during a collision.

[0041] Furthermore, as a preferred embodiment of this solution and not a limitation, at least two of the piezoresistive bases 1 are connected to the counterweight 2.

[0042] In this embodiment, the synergistic effect of multiple piezoresistive bases significantly enhances the stability and load-bearing capacity of the entire guardrail system. Multiple piezoresistive bases distribute the force, allowing the guardrail to transmit the force to the ground more evenly when subjected to external impact, thereby reducing the risk of structural deformation or damage due to excessive localized stress. The weight of the counterweight is evenly applied to multiple piezoresistive bases, each of which is tightly bonded to the ground through its own negative pressure adsorption and elastic pin device, forming a stable support structure. This multi-point support method not only improves the overall stability of the guardrail but also enhances its adaptability to complex road conditions and harsh environments.

[0043] Furthermore, as a preferred embodiment of this solution and not a limitation, the base body 11 is provided with four elastic pin devices 14 at its bottom, and each elastic pin device 14 is respectively located in the inner corner area where adjacent two sides of the base body 11 meet.

[0044] In this embodiment, the contact stability between the piezoresistive base 1 and the ground can be uniformly enhanced from multiple directions. By setting elastic pin devices in the four inner corner areas, it can be ensured that when the piezoresistive base is subjected to external impact, regardless of the direction of the impact, the impact force can be dispersed and offset through the close contact between the pin devices and the ground, thereby effectively preventing the base from shifting or tipping over, and significantly improving the overall stability of the guardrail.

[0045] The working principle of this embodiment is as follows:

[0046] This application discloses a piezoresistive low-variability movable guardrail, which uses the continuous gravitational pressure applied by the counterweight to keep the piezoresistive base adhering to the road surface, effectively suppressing the lateral displacement of the guardrail during collisions; and by setting installation holes, it can directly utilize the existing posts of the scrap double-wave beam guardrail for positioning and installation, avoiding the structural damage to the asphalt pavement caused by traditional steel nail anchoring, reducing maintenance costs, and realizing the recycling of waste materials, thus greatly reducing resource waste.

[0047] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A piezoresistive low-variance movable guardrail, characterized in that, It includes a piezoresistive base (1) and a counterweight (2) connected to the piezoresistive base (1) and used to apply weight pressure to the piezoresistive base (1). The counterweight (2) has mounting holes (4) through which old guardrail posts (3) pass to connect to the piezoresistive base (1).

2. The piezoresistive low-variance movable guardrail according to claim 1, characterized in that, The piezoresistive base (1) includes a base body (11) and a flexible sealing pad (12) arranged along the bottom outer contour of the base body (11). The counterweight (2) squeezes the piezoresistive base (1) to press down the flexible sealing pad (12) to form a negative pressure difference between the inner and outer sides of the piezoresistive base (1).

3. The piezoresistive low-variance movable guardrail according to claim 2, characterized in that, The piezoresistive base (1) is provided with an air nozzle (13) that connects to the interior of the piezoresistive base (1) and is used for vacuuming.

4. A piezoresistive low-variance movable guardrail according to claim 2, characterized in that, The bottom of the piezoresistive base (1) is provided with an elastic ejector device (14). The elastic ejector device (14) includes an elastic element (141), a mounting groove (142) for the elastic element (141) to be installed, and an ejector (143) that abuts against the elastic element (141). The elastic element (141) drives the ejector (143) to extend out from under the piezoresistive base (1).

5. A piezoresistive low-variance movable guardrail according to claim 1, characterized in that, The piezoresistive base (1) is provided with a first inclined surface (5) and a second inclined surface (6) that gradually extend outward from top to bottom along the width direction of the counterweight (2) in the opposite direction.

6. A piezoresistive low-variance movable guardrail according to claim 1, characterized in that, The counterweight (2) has a first connector (7) and a second connector (8) at both ends. The first connector (7) and the second connector (8) are offset in the vertical direction. The first connector (7) has a first positioning hole (10) for the connecting pin (9) to pass through, and the second connector (8) has a second positioning hole (101) for the connecting pin (9) to pass through.

7. A piezoresistive low-variance movable guardrail according to claim 6, characterized in that, It also includes a connector (16) for connecting two adjacent old guardrails (15), the old guardrails (15) having a first connecting hole (17), the connector (16) having a second connecting hole (18) and a third connecting hole (181) respectively corresponding to the first connecting hole (17) on the two adjacent old guardrails (15), fasteners passing through the first connecting hole (17) and the second connecting hole (18) to fix the connector (16) to the old guardrail (15), and fasteners passing through the first connecting hole (17) and the third connecting hole (181) to fix the connector (16) to another old guardrail (15).

8. A piezoresistive low-variance movable guardrail according to claim 7, characterized in that, The connector (16) is also provided with a third positioning hole (102) through which the connecting pin (9) passes. The first positioning hole (10), the second positioning hole (101) and the third positioning hole (102) coincide and correspond to each other in the vertical direction.

9. A piezoresistive low-variance movable guardrail according to claim 1, characterized in that, At least two of the piezoresistive bases (1) are connected to the counterweight (2).

10. A piezoresistive low-variance movable guardrail according to claim 4, characterized in that, The base body (11) has four elastic pin devices (14) at its bottom, and each elastic pin device (14) is located in the inner corner area where the adjacent two sides of the base body (11) meet.

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