A flexible protection system for the ramp nose

Abstract

The present invention relates to a flexible protection system for a ramp nose end, which includes a first protection component. The first protection component includes a first barrier net. The first protection component replaces the nose end section of the guardrail. One end of the first barrier net is connected to the guardrail on one side, and the other end is connected to the guardrail or the ground on the other side. The first barrier net includes braided ropes, and the first barrier net is erected by a number of first columns. The first column includes a flexible inner core and an outer buffer layer. By adopting the flexible protection concept of this system, the impact energy of the vehicle can be effectively weakened, the safety of the vehicle and the driver and passengers is improved, the flexibility and adaptability of the layout are greatly increased, the degree of accident casualties is effectively reduced, the rescue of the vehicle is conveniently and quickly implemented, the structural layout is simple, and the production cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic safety facilities, and particularly to a flexible protection system for a ramp nose end. Background Art

[0002] Currently, for the safety protection structures at highway ramp exits and main road bifurcations, corrugated beam guardrails are usually adopted, that is, the roadside protection is formed by bending the corrugated beam guardrails within the triangular area of the nose end. Although the corrugated beam guardrails have a certain energy dissipation effect, in the event of an accident in this area, frontal collisions are likely to occur. The energy dissipation effect of the existing corrugated beam guardrails is limited, resulting in more serious damage to vehicles after an accident in this area. Currently, warning piles and road markings are usually used in this area to reduce accidents by improving the warning effect, but these measures are difficult to fundamentally avoid major accidents involving vehicle destruction and human casualties. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above deficiencies that the existing protection structures for ramp nose ends mainly use warning signs or corrugated beam guardrails, with limited protection effects and unable to effectively reduce the harm of accidents to people and vehicles, and to provide a flexible protection system for a ramp nose end.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A flexible protection system for a ramp nose end, comprising a first protection component. The first protection component includes a first net. The first protection component replaces the nose end section of the guardrail. One end of the first net is connected to the guardrail on one side, and the other end is connected to the guardrail or the ground on the other side. The first net includes braided ropes, and the first net is erected by a number of first columns. The first columns include flexible inner cores and outer buffer layers.

[0006] Adopting a flexible protection system for the nose end of a ramp according to the present invention, the first protection component replaces the nose end section of the guardrail, that is, the guardrail structure is no longer arranged in this section. The two ends of the first protection component are connected to the ends of the original guardrail, avoiding the large structural stiffness of the conventional concrete or steel structure guardrail wrapped with buffer materials during impact, which is likely to cause vehicle damage or personal injury; the layout shape of the first protection component in the nose end section can follow the position and trend of the original guardrail structure, or can be set into a V shape, a straight shape, an arc shape, etc. For example, if it is set into a straight shape, the two ends of the first net are respectively connected to the guardrails of the main road and the ramp. If it is set into a V shape, the first net arranged on one side of the main road is arranged with one end connected to the main road guardrail and the other end can be connected to an anchor. The arrangement on the ramp side is similar, that is, the first net is connected to the anchor at the end of the V shape and the other end is connected to the guardrail of the corresponding driving lane. The first net is used to intercept vehicles, and the first net includes braided ropes. The specific braiding process can adopt the braiding processes of textiles such as sweaters and braided belts in the existing technology. The cross-sectional size, tightness degree of the braided ropes, the mesh structure of the first net, etc. are set according to actual needs. After being impacted, the braided ropes will stretch and tighten, and the strands of the braided ropes will be squeezed, drawn, and rubbed, thereby effectively consuming mechanical energy and achieving the purpose of flexibly buffering and intercepting vehicles. The flexible inner core is used to provide a certain stiffness to support the first upright post for the installation of the first net, that is, the braided ropes pass through the first upright post to form a continuous net structure. The first upright post is used to maintain the spacing of the braided ropes. The flexible inner core adopts flexible components such as PVC, PU, PE, TPU, etc. Compared with metal components, it will not break into sharp parts to cause secondary injuries after being impacted, and can also effectively cooperate with the first net to deform for interception. The first upright post includes a flexible inner core and an outer buffer layer, enabling the cross-sectional size of the flexible inner core to be reduced as much as possible, thereby reducing its stiffness, ensuring its flexible protection, and also ensuring the overall cross-sectional size of the upright post to effectively support and install on site.

[0007] This protection system adopts a flexible protection concept, which can effectively weaken the vehicle impact energy, improve the safety of vehicles and drivers and passengers, greatly increase the layout flexibility and adaptability, effectively reduce the accident casualty degree, facilitate the rapid implementation of vehicle rescue, has a simple structure layout, and a low production cost.

[0008] Preferably, the first protection component is arranged in a V shape, and a linkage energy-consuming component is connected between the first nets on both sides of the V shape.

[0009] More preferably, the linkage energy-consuming component includes braided ropes.

[0010] Effectively connect the V-shaped sides of the first protective component to form a multi-layer linkage energy dissipation device. No matter which side the vehicle impacts from, that is, from the ramp side or the main road side, the entire first protective component can be driven to deform and intercept energy through the linkage energy dissipation component, improving the interception ability and the safety degree after impact.

[0011] Preferably, it further includes a second protective component. The second protective component is arranged in a V shape. The two ends of the V-shaped opening of the second protective component are respectively connected to the guardrail. The V-shaped opening of the second protective component faces the nose end section. The second protective component includes a second net. The second net includes braided ropes. The second net is erected by a number of second columns. The second column includes a flexible inner core and an outer buffer layer.

[0012] Similar to the first net, the second net is connected to the ground anchor at the V-shaped end and the other end is connected to the guardrail of the corresponding lane. Of course, it can also be a whole net surface supported by the second columns at the V-shaped end and tensioned into a V-shaped structure.

[0013] Further preferably, the energy dissipation capacity and strength of the second net are respectively greater than those of the first net.

[0014] The energy dissipation capacity and strength can be adjusted in terms of the braided material, thickness, tightness, net surface form, and the number and performance of the energy dissipation components attached to the braided ropes.

[0015] Further preferably, the second columns are located at the V-shaped ends of the second protective component.

[0016] Preferably, a number of loops are also woven on the braided ropes. The loops are distributed along the length direction of the braided ropes. Elastic-plastic damping members are arranged inside the loops. Stretching the braided ropes can drive the loops to squeeze the elastic-plastic damping members.

[0017] Further preferably, the material of the elastic-plastic damping members is at least one of foam or rubber.

[0018] Further preferably, the elastic-plastic damping members are distributed circumferentially along the cross-section of the braided ropes.

[0019] Preferably, the braided ropes are nylon ropes, and the outer buffer layer is high-elastic sponge or foam.

[0020] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The flexible protection system for the ramp nose end described in the present invention adopts a flexible protection concept, which can effectively weaken the impact energy of vehicles, reduce damage, and avoid the conventional hard interception method of wrapping buffer materials outside concrete or steel structure guardrails. After being impacted, it will not break into sharp parts to cause secondary injuries, improving the safety of vehicles and drivers and passengers. The flexibility and adaptability of the layout are greatly increased, effectively reducing the degree of accident casualties, facilitating the rapid implementation of vehicle rescue, with a simple structure layout and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic plan layout diagram of the flexible protection system for the ramp nose end described in Embodiment 1;

[0023] Figure 2 FIG. is a schematic elevation structure diagram of one side of the first protection component described in Embodiment 1;

[0024] Figure 3 FIG. is a detailed drawing of the collar in Embodiment 1;

[0025] Figure 4 FIG. is a schematic diagram of the initial state of the braided rope in Embodiment 1;

[0026] Figure 5 FIG. is a schematic diagram of the interception state of the braided rope in Embodiment 1;

[0027] Figure 6 FIG. is a schematic plan layout diagram of the flexible protection system for the ramp nose end described in Embodiment 2;

[0028] Figure 7 For Figure 6 the sectional view taken along A - A in

[0029] Figure 8 FIG. is a schematic plan layout diagram of the flexible protection system for the ramp nose end described in Embodiment 3;

[0030] Figure 9 FIG. is a schematic elevation structure diagram of one side of the second protection component in Embodiment 3.

[0031] Reference numerals in the figures: 1 - first column, 11 - flexible inner core, 12 - outer buffer layer, 2 - first net, 3 - linkage energy - dissipating component, 4 - guardrail, 5 - second column, 6 - second net, 61 - collar, 62 - elastoplastic damping member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above - mentioned subject matter of the present invention is limited to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0033] Example 1

[0034] A flexible protection system for a ramp nose end according to the present invention is as follows Figure 1-2 shown, including a first protection component, the first protection component includes a first barrier net 2, the first protection component replaces the nose end section of the guardrail 4, one end of the first barrier net 2 is connected to the guardrail 4 on one side, and the other end is connected to the guardrail 4 or the ground on the other side. The first barrier net 2 includes braided ropes, and the first barrier net 2 is erected by a number of first columns 1. The first column 1 includes a flexible inner core 11 and an outer buffer layer 12.

[0035] Specifically, as Figure 1 shown, the first protection component is located at the nose end section of the guardrail 4 and is arranged in a V shape. The first barrier net 2 is connected to the ground anchor at the end of the V shape, and the other end is connected to the concrete or steel structure at the end of the guardrail 4 of the corresponding lane. As Figure 2 shown, the first barrier net 2 is used to intercept vehicles. The first barrier net 2 can be formed by braiding high-strength nylon ropes, and other materials such as polyester and polypropylene can also be selected for braiding. The specific braiding process can adopt the braiding processes of textiles such as sweaters and braided belts in the prior art. The cross-sectional size, tightness degree of the braided ropes, the mesh structure of the first barrier net 2, etc. are set according to actual needs. After being impacted, the braided ropes will stretch and tighten, and the strands of the braided ropes will be squeezed, drawn, and rubbed, thereby effectively consuming mechanical energy and achieving the purpose of flexibly buffering and intercepting vehicles.

[0036] The flexible inner core 11 is used to provide a certain stiffness to support the first column 1 for the installation of the first barrier net 2. The cross-sectional shape, size, layout spacing of the flexible inner core 11, and parameters such as the number of layers, performance, and vertical spacing of the first barrier net 2 are determined according to actual design needs. The flexible inner core 11 adopts flexible components such as PVC, PU, PE, TPU, etc. For example, a plastic rod with a diameter of 2 - 3.5 cm is used. The outer buffer layer 12 plays a buffering role and can be selected such as high-elastic sponge, foam, etc., and has the characteristics of soft anti-collision, corrosion resistance, high temperature resistance, and aging resistance.

[0037] No guardrail structure or anti-collision wall is provided at the nose end section to avoid interception by rigid structures; the layout shape of the first protection component at the nose end section can follow the position and direction of the original guardrail structure. In this embodiment, it is exemplified as a V shape to form a larger interception range, and it can intercept vehicles coming from both the main road and ramp directions. The attached drawings are only for illustration, and the V shape does not limit the end to be a sharp tip, that is, only a single first column 1 is used. The number of first columns 1 can be arranged according to actual needs, so that the end of the V shape forms a flat section or an arc section.

[0038] As Figure 3As shown, a number of loop sleeves 61 can also be woven on the nylon rope. The loop sleeves 61 formed by weaving can shrink in size when the nylon rope is stretched as a whole. The weaving method can adopt the existing weaving methods. The loop sleeves 61 are distributed along the length direction of the nylon rope. An elasto-plastic damping member 62 is arranged inside the loop sleeves 61. As Figure 4 shown, the elasto-plastic damping member 62 can be a foam member, a rubber member, or a foam and rubber polymer member. The shape can be spherical, rod-shaped, capsule-shaped, etc. The shape and size of the elasto-plastic damping member 62 only need to meet the requirement that it can be stably clamped into the loop sleeve 61. The elasto-plastic damping member 62 is distributed along the circumferential direction of the cross-section of the woven rope. The quantity in the circumferential direction and the density of the distribution along the longitudinal direction of the woven rope are determined according to the actual energy consumption requirements.

[0039] When the vehicle collides with the first net 2, the first net 2 will be tightened by the pulling force, which will cause the loop sleeve 61 to tighten and then squeeze the elasto-plastic damping member 62. The elasto-plastic damping member 62 can withstand a certain pressure and undergo plastic deformation. However, when the pressure received by the elasto-plastic damping member 62 exceeds the preset value, it will break, as Figure 9 shown, that is, the elasto-plastic damping member 62 will undergo three stages of elastic deformation, plastic deformation, and fragmentation when being squeezed. During this process, the frictional force generated by the wire drawing between the strands of the rope weaving when the loop sleeve 61 shrinks and the chemical bonding force between the structural molecules generated by the plastic deformation and fragmentation of the elasto-plastic damping member 62 being squeezed can both achieve the purpose of damping energy consumption. That is, the linear tightening of the woven rope itself in cooperation with the loop sleeve 61 squeezing the elasto-plastic damping member 62 can convert the externally transmitted extrusion mechanical energy into material deformation energy, dissipate energy, further improve the interception performance of the first protection component, effectively decelerate the vehicle until it stops, so as to achieve the purpose of flexible protection, effectively reduce the kinetic energy of the accident vehicle in a short time, make the vehicle brake safely and flexibly, and facilitate the rescue of the accident vehicle and personnel.

[0040] According to actual needs, the first protection component can be arranged in multiple layers on the interception path.

[0041] This protection system adopts the idea of flexible protection, can effectively weaken the impact energy of the vehicle, improves the safety of the vehicle and the driver and passengers, greatly increases the flexibility and adaptability of the layout, effectively reduces the degree of accident casualties, facilitates the rapid implementation of the rescue of the vehicle, has a simple structural layout, and a low production cost.

[0042] Embodiment 2

[0043] For the flexible protection system of the ramp nose end described in the present invention, on the basis of Embodiment 1, it further includes a linkage energy-consuming component 3. The linkage energy-consuming component 3 is located between the first nets 2 on both sides of the V shape, as Figure 6-7As shown in the figure. Adding the linkage energy-consuming component 3 can effectively connect the V-shaped sides of the first protective component, forming a multi-layer linkage energy-consuming device. No matter which side the vehicle impacts from, that is, the ramp side or the main road side, the entire first protective component can be driven by the linkage energy-consuming component 3 to jointly deform and intercept energy consumption, improving the interception ability and the safety degree after impact.

[0044] The linkage energy-consuming component 3 can also adopt the same structural form as the first netting 2, such as a structure composed of several nylon ropes arranged horizontally. Other materials such as polyester and polypropylene can also be selected. A number of loops 61 are woven on the nylon ropes, and an elastoplastic damping component 62 ( Figure 7 (not shown) is provided inside the loop 61. The linkage energy-consuming component 3 can not only effectively form a linkage protection, but also avoid excessive rigidity to form a hard interception, causing obvious damage to the vehicle, and can also avoid the fragmentation of sharp parts during the interception process, causing further harm and damage. It can also slow down the vehicle to a certain extent, thereby improving the interception effect, shortening the braking distance, and increasing the safety degree.

[0045] Embodiment 3

[0046] A flexible protection system for the nose end of a ramp according to the present invention, on the basis of Embodiment 2, further includes a second protective component, such as Figure 8-9 shown in the figure. The second protective component is arranged in a V shape, Figure 8 only shown as being the same as the first netting 2, connected to the ground anchor at the end of the V shape and the other end connected to the guardrail 4 of the corresponding driving lane. It can be connected to the connection end face between the first protective component and the guardrail 4, or can also be connected to the inner side of the guardrail 4. The V-shaped opening of the second protective component faces the nose end section, that is, is arranged opposite to the V-shaped opening of the first protective component. The second protective component includes a second netting 6, and the second netting 6 also includes braided ropes. The second netting 6 is erected by a number of second columns 5. The second column 5 includes a flexible inner core 11 and an outer buffer layer 12. The second column 5 is located at the V-shaped end of the second protective component, that is, the joint part where the V shape is far from the opening. The second netting 6 on the corresponding side passes through the second column 5 and is connected to the ground anchor.

[0047] The optional materials of the flexible inner core 11 and the outer buffer layer 12 corresponding to the second column 5 are the same as those of the flexible inner core 11 and the outer buffer layer 12 corresponding to the first column 1. The relevant structural parameters of the flexible inner core 11 and the outer buffer layer 12 corresponding to the second column 5 are determined according to actual needs.

[0048] The second netting 6 can also adopt the same structural form as the first netting 2, that is, a nylon rope braided structure. Other materials such as polyester and polypropylene can also be selected. A number of loops 61 are woven on the nylon ropes, and an elastoplastic damping component 62 ( Figure 9 (not shown) is provided inside the loop 61.

[0049] A second protective component is added to form a triple interception combination of the flexible protection system, effectively decelerating the vehicle until it stops; preferably, the energy dissipation capacity and strength of the second net 6 are respectively greater than those of the first net 2, and the energy dissipation capacity and strength can be adjusted by aspects such as the woven material, weaving process, thickness, tightness, net surface form, and the quantity and performance of the elastoplastic damping components 62 attached to the woven rope. In this embodiment, by weaving the second net 6 into a horizontal and vertical two-way structure, it can also be woven wider, or more elastoplastic damping components 62 can be added to adjust the energy dissipation time when the vehicle contacts the corresponding net, that is, when the vehicle speed is relatively fast, it is intercepted and decelerated by the first protective component with lower energy dissipation capacity, and when the vehicle speed is relatively slow, it is stopped by the second protective component with stronger energy dissipation capacity, so as to be more in line with the interception process and improve the safety and effectiveness of vehicle interception.

[0050] Of course, the second net 6 can also adopt a completely different structural form from the first net 2.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flexible protection system for a ramp nose end, characterized in that, it includes a first protection component. The first protection component includes a first net (2). The first protection component replaces the nose end section of the guardrail (4). One end of the first net (2) is connected to the guardrail (4) on one side, and the other end is connected to the guardrail (4) on the other side or the ground. The first net (2) includes braided ropes. The first net (2) is erected by a number of first columns (1). The first column (1) includes a flexible inner core (11) and an outer buffer layer (12). A number of loop sleeves (61) are also woven on the braided ropes. The loop sleeves (61) are distributed along the length direction of the braided ropes. An elastoplastic damping member (62) is provided in the loop sleeves (61). Stretching the braided ropes can drive the loop sleeves (61) to squeeze the elastoplastic damping member (62).

2. The flexible protection system for a ramp nose end according to claim 1, characterized in that, the first protection component is arranged in a V shape, and a linkage energy dissipation component (3) is connected between the first nets (2) located on both sides of the V shape.

3. The flexible protection system for a ramp nose end according to claim 2, characterized in that, the linkage energy dissipation component (3) includes braided ropes.

4. The flexible protection system for a ramp nose end according to claim 1, characterized in that, it further includes a second protection component. The second protection component is arranged in a V shape. The two ends of the V-shaped opening of the second protection component are respectively connected to the guardrail (4). The V-shaped opening of the second protection component faces the nose end section. The second protection component includes a second net (6). The second net (6) includes braided ropes. The second net (6) is erected by a number of second columns (5). The second column (5) includes a flexible inner core (11) and an outer buffer layer (12).

5. The flexible protection system for a ramp nose end according to claim 4, characterized in that, the energy dissipation capacity and strength of the second net (6) are respectively greater than those of the first net (2).

6. The flexible protection system for a ramp nose end according to claim 4, characterized in that, the second column (5) is located at the V-shaped end of the second protection component.

7. The flexible protection system for a ramp nose end according to any one of claims 1-6, characterized in that, the material of the elastoplastic damping member (62) is at least one of foam or rubber.

8. The flexible protection system for a ramp nose end according to any one of claims 1-6, characterized in that, the elastoplastic damping member (62) is distributed circumferentially along the cross section of the braided ropes.

9. The flexible protection system for a ramp nose end according to any one of claims 1-6, characterized in that, the braided ropes are nylon ropes, and the outer buffer layer (12) is high-elastic sponge or foam.

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