CN108487136B - Retractable energy-absorbing road guardrail - Google Patents

Abstract

The invention relates to a retractable energy-absorbing road guardrail, comprising a cast iron base, a first guardrail column, a second guardrail column, two sets of horizontal pipe assemblies and a plurality of vertical pipes. The first guardrail column and the second guardrail column The vertical columns are respectively fixed on the cast iron bases, the horizontal pipe assemblies are arranged between the first guardrail vertical column and the second guardrail vertical column in an up-down structure, and a plurality of vertical pipes are arranged between the two sets of horizontal pipe assemblies at equal intervals. The horizontal tube assembly includes a large horizontal tube, a middle horizontal tube and a small horizontal tube with the same length. The second guardrail column is connected, and the cross-sectional dimensions of the large transverse pipe, the middle transverse pipe and the small transverse pipe are reduced. Compared with the prior art, the invention has the advantages of reducing the secondary injury of personnel caused by vehicle collision, reducing the maintenance cost of the guardrail, saving energy and protecting the environment.

Description

A retractable energy-absorbing road guardrail

technical field

The invention relates to the technical field of road guardrails, in particular to a retractable energy-absorbing road guardrail.

Background technique

The road guardrail separates motor vehicles, non-motor vehicles and pedestrian traffic, and divides the road longitudinally on the cross-section, so that motor vehicles, non-motor vehicles and pedestrians run in separate lanes, which improves the safety of road traffic and improves the traffic order. It has blocking function, separation function, warning function and aesthetic function.

As a basic safety facility on the highway, the road guardrail plays a positive role in the traffic safety on the highway, but at the same time, the road guardrail itself has many deficiencies in protection. For example, the energy-absorbing effect of road guardrails is not obvious, and it cannot effectively absorb a large amount of kinetic energy of impacting vehicles; road guardrails are mainly assembled with screws, and it is easy to cause the guardrail to fall apart after the vehicle hits the guardrail, and the fragments of the guardrail are scattered and the maintenance cost is high; After a car accident, the top bar of the guardrail is at the right height and faces the front windshield of the vehicle, which can easily pierce the windshield and stab the driver and co-pilot sitting in the front row.

While guardrails don't cause a crash, they are likely to aggravate it. Therefore, it is urgent to improve the existing road guardrail, so that it can reduce the damage to the occupants of the damaged guardrail when the car collides with it, and also reduce the cost of road guardrail maintenance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a retractable energy-absorbing road guardrail in order to overcome the above-mentioned defects of the prior art.

The object of the present invention can be realized through the following technical solutions:

A retractable energy-absorbing road guardrail, comprising a cast iron base, a first guardrail column, a second guardrail column, two sets of horizontal pipe assemblies and a plurality of vertical pipes, wherein the first guardrail column and the second guardrail column are respectively fixed On the cast iron base, the horizontal tube assembly is arranged between the first guardrail column and the second guardrail column in an up-down structure, and a plurality of vertical tubes are arranged at equal intervals between the two sets of horizontal tube assemblies. It includes a large horizontal tube, a middle horizontal tube and a small horizontal tube with the same length and structure. The two guardrail columns are connected, and the cross-sectional dimensions of the large horizontal tube, the middle horizontal tube and the small horizontal tube are reduced.

Preferably, the inner surface of the other end of the large transverse pipe is provided with a first inner convex portion, and one end of the middle transverse pipe is provided with a first clamping end, and the size of the first clamping end is the same as that of the cross-sectional dimension of the large transverse pipe. A clamping end and the first inner convex portion form a first interlocking structure, and the first clamping end and the first inner convex portion are clamped and fixed by a hexagonal bolt.

Preferably, the inner surface of the other end of the middle horizontal tube is provided with a second inner convex portion, and the end connecting the small horizontal tube and the middle horizontal tube is provided with a second clamping end, and the size of the second clamping end is the same as that of the middle transverse tube. The cross-sectional dimensions of the pipes are the same, the second clamping end and the second inner convex portion form a second interlocking structure, and the second clamping end and the second inner convex portion are clamped and fixed by hexagonal bolts.

Preferably, the large horizontal tube, the middle horizontal tube and the small horizontal tube are respectively provided with springs, one end of the inner spring of the large horizontal tube is connected with the first guardrail column, and the other end is connected with the outer wall of the first clamping end, One end of the inner spring of the middle horizontal tube is connected to the inner wall of the first clamping end, the other end is connected to the outer wall of the second clamping end, one end of the inner spring of the small transverse tube is connected to the inner wall of the second clamping end, and the other end is connected to the second guardrail Column connection.

Preferably, the first guardrail column is provided with a first horizontal pipe connecting piece, the first transverse pipe connecting piece is provided with a first mounting hole for fixing the large transverse pipe; the second guardrail column is provided with a first installation hole for fixing the large transverse pipe; The second horizontal pipe connecting piece is provided with a second mounting hole for fixing the large horizontal pipe.

Preferably, the outer surface of the middle horizontal tube is provided with a first crush groove for energy absorption, and the total length of the first crush groove accounts for half of the total length of the middle horizontal tube. Its outer surface is provided with a second crush groove for energy absorption, and the total length of the second crush groove accounts for three-quarters of the total length of the small transverse tube.

Preferably, the interior of the first guardrail column and the second guardrail column adopts a honeycomb structure, and the in-plane direction of the structural plate of the honeycomb structure is the same as the direction of the road.

Preferably, the cast iron base is fixed on the ground by expansion screws.

Preferably, after the vertical pipes are arranged at equal intervals, they are connected to two sets of horizontal pipe assemblies arranged up and down by spot welding.

Preferably, the tops of the first guardrail column and the second guardrail column are respectively provided with a warning device, and the warning device includes a warning light and a solar panel connected to the warning light.

Compared with the prior art, the present invention has the following advantages:

(1) Reduction of secondary injuries: The present invention designs a traditional whole guardrail transverse tube as a three-section retractable guardrail transverse tube, which can be retracted when a vehicle collides, reducing the direct insertion of the transverse tube into the vehicle during collision. The possibility of causing secondary injury to the occupants in the vehicle; in addition, there is an interlocking structure between the horizontal tube and the horizontal tube, and the interlocking structure stabilizes the connection between the horizontal tube and the horizontal tube. The possibility of sabotage flying out causing secondary injury to other moving vehicles as well as the occupants of the colliding vehicle;

(2) Reduce the maintenance cost: the three-section transverse tube in the present invention is equipped with a spring, the collision of the vehicle will cause the spring to be compressed, and the compression force of the spring can absorb the kinetic energy brought by the collision; Crushing grooves are provided on the outer surface, which can absorb more kinetic energy in the event of a vehicle collision; the internal structure of the guardrail column in the present invention is a honeycomb structure, which is an energy-absorbing structure, which further reduces the damage to the guardrail. , reducing the maintenance cost of the guardrail after a collision;

(3) Energy saving and environmental protection: The present invention is provided with a warning light to warn the driver at night or in low light conditions. The warning light is powered by solar energy, and provides the warning function while saving energy and protecting the environment.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

2 is a cross-sectional view of the internal structure of a guardrail column of the present invention;

Fig. 3 is the structural sectional view of the joint of two transverse pipes of the present invention;

4 is a schematic diagram of an interlocking structure in the present invention;

The numbers in the figure show:

1. Cast iron base, 2. First guardrail column, 3. Second guardrail column, 4. Large horizontal tube, 5. Middle horizontal tube, 6. Small horizontal tube, 7. Hex bolt, 8. First horizontal tube connector , 9, the second horizontal tube connector, 10, the internal spring of the horizontal tube, 11, the vertical tube, 12, the first crush groove, 13, the warning light, 14, the second crush groove, 501, the second inner convex part, 601 , the second clamping end.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example

As shown in FIGS. 1 to 4 , the present invention relates to a retractable energy-absorbing road guardrail, and the placement direction of the energy-absorbing road guardrail of the present invention is consistent with the extending direction of the road. The energy-absorbing road guardrail of the present invention includes a cast iron base 1 , a first guardrail column 2 , a second guardrail column 3 , a horizontal pipe assembly and a vertical pipe 11 . The cast iron base 1 is fixed on the ground, the first guardrail column 2 and the second guardrail column 3 are arranged on the cast iron base 1, and there are two sets of transverse tube assemblies, which are respectively arranged on the upper ends of the first guardrail column 2 and the second guardrail column 3. Between the first guardrail uprights 2 and the lower ends of the second guardrail uprights 3 , the horizontal tube assembly includes a large horizontal tube 4 , a middle horizontal tube 5 and a small horizontal tube 6 , which are connected in sequence.

The cast iron base 1 is fixed to the ground by means of expansion screws. A hole is provided in the center of the cast iron base 1 . The cross-sectional dimensions of the first guardrail column 2 and the second guardrail column 3 match the size of the hole of the cast iron base 1, and the first guardrail column 2 and the second guardrail column 3 are respectively inserted into the holes of the two cast iron bases 1, and are connected to the hole of the cast iron base 1. The connection of the cast iron base 1 will be fixed by welding. The hole of the cast iron base 1 used in this embodiment is square, and its side length is 80 mm, and the square column structure of the first guardrail column 2 and the second guardrail column 3 used in this embodiment.

The interior of the first guardrail column 2 and the second guardrail column 3 adopts a honeycomb structure, and the in-plane direction of the structural plate of the honeycomb structure is the same as the road direction. The upper and lower sides of the first guardrail column 2 are respectively welded with a semi-octagonal first horizontal pipe connector 8, and the first horizontal tube connector 8 is provided with a square first installation hole, the size of the first installation hole and the large horizontal The cross-sectional dimensions of the tubes 4 are matched. After the large horizontal pipe 4 is fixed in the first installation hole, the connection between the large horizontal pipe 4 and the first horizontal pipe connecting piece 8 is reinforced by welding, so as to be fixedly connected with the first guardrail column 2 . The upper and lower sides of the second guardrail column 3 are respectively welded with a second half-octagonal second horizontal pipe connecting piece 9. The second horizontal pipe connecting piece 9 is provided with a square second installation hole. The size of the second installation hole is the same as that of the small horizontal The cross-sectional dimensions of the tubes 6 are matched. After the small horizontal tube 6 is fixed in the second installation hole, the connection between the small horizontal tube 6 and the second horizontal tube connecting piece 9 is reinforced by welding, so as to be fixedly connected with the second guardrail column 3 .

The large horizontal tube 4, the middle horizontal tube 5, and the small horizontal tube 6 are of square hollow column structure. The lengths of the large horizontal tube 4, the middle horizontal tube 5, and the small horizontal tube 6 are all 1000 mm, and the cross-sectional side length of the large horizontal tube 4 is 50 mm. , the cross-sectional side length of the middle horizontal tube 5 is 40 mm, and the cross-sectional side length of the small horizontal tube 6 is 30 mm. One end of the large horizontal tube 4 is fixed in the first installation hole of the first horizontal tube connecting piece 8, and the other end is a hollow end, and its inner surface is provided with a first inner convex part; the middle horizontal tube 5 is connected with the large horizontal tube 4 There is a first clamping end at the end of the shank. 5 After clamping, fix it with hexagon bolts 7. The other end of the middle horizontal tube 5, that is, the end connected with the small horizontal tube 6, has the same structure as the hollow end of the large horizontal tube 4, that is, the inner surface of the hollow end of the middle horizontal tube 5 is provided with a second inner convex portion 501; A second clamping end 601 is provided at the end connecting the small transverse pipe 6 and the middle transverse pipe 5, and the second clamping end 601 has the same cross-sectional dimension as the middle transverse pipe 5; the second inner convex part 501 and the second clamping end 601 An interlocking structure is formed, and the middle horizontal tube 5 and the small horizontal tube 6 are clamped and fixed by hexagonal bolts 7 . The other end of the small transverse pipe 6 is fixed in the second installation hole of the second transverse pipe connecting piece 9 . The hexagonal bolts 7 used in this embodiment are tempered to achieve the required hardness and bearing capacity.

The outer surfaces of the middle horizontal tube 5 and the small horizontal tube 6 are provided with crush grooves for energy absorption, wherein the total length of the first crush groove 12 on the outer surface of the middle horizontal tube 5 is 500 mm, and the first crush groove on the surface of the small horizontal tube 6 is 500 mm. The total length of the two crush grooves 14 is 750 mm. In the event of a collision, the crush groove guides the transverse tube to collapse and absorb energy.

There are springs inside the three-section horizontal tube. One end of the inner spring of the large horizontal tube 4 is connected to the first guardrail column 2, and the other end is connected to the outer wall of the first clamping end of the middle horizontal tube 5. One end of the inner spring 10 of the middle horizontal tube It is connected with the inner wall of the first clamping end of the middle horizontal tube 5, the other end is connected with the outer wall of the second clamping end 601 of the small transverse tube 6, and one end of the inner spring of the small transverse tube 6 is connected with the second clamping end of the small transverse tube 6. The inner wall of the terminal 601 is connected, and the other end is connected with the second guardrail column 3 .

Warning devices are installed on the tops of the first guardrail column 2 and the second guardrail column 3 respectively. The device includes a warning light 13 and a solar panel. The solar panel is connected to the warning light 13 and is used to store electrical energy. Light 13 will flash to alert passing drivers.

The vertical pipes 11 are connected with the horizontal pipe assemblies on the upper and lower sides by spot welding at a distance of 100 mm each.

The first guardrail column 2, the second guardrail column 3, the large horizontal pipe 4, the middle horizontal pipe 5, the small horizontal pipe 6 and the vertical pipe 11 in the energy-absorbing road guardrail are all made of galvanized steel.

The working principle of the present invention is:

The invention aims at realizing energy absorption when a vehicle running on a road collides with a guardrail and deforms the guardrail. When a side collision occurs between the car and the second guardrail column 3, the second guardrail column 3 deforms and absorbs energy through the internal honeycomb structure. After the second guardrail column 3 absorbs a large amount of energy and the expansion screw of the cast iron base 1 breaks, the second The guardrail column 3 together with the cast iron base 1 is displaced in the direction of the first guardrail column 2. At this time, the small transverse tube 6 begins to collapse, and the spring inside the small transverse tube 6 begins to compress and absorb energy. If the collision energy is small and only the small horizontal pipe 6 is damaged, after the accident, only the small horizontal pipe 6, the second guardrail column 3, the cast iron base 1 connected to the second guardrail column 3, and the damaged vertical pipe 11 should be replaced. If the collision energy is large, for example, the small horizontal tube 6 continues to move in the direction of the first guardrail column 2 after the collapse and the internal spring is completely compressed, and the end of the small horizontal tube 6 will be used to connect the small horizontal tube 6 with the The hexagonal bolts 7 of the middle horizontal tube 5 are cut off, and then the inner spring 10 of the middle horizontal tube begins to compress and absorb energy. The part of the small horizontal tube 6 without the crush groove is completely contracted into the middle horizontal tube 5, and the middle horizontal tube 5 begins to collapse and absorb energy. , If the middle horizontal tube 5 collapses and the collision energy is completely absorbed after the inner spring 10 of the middle horizontal tube compresses and absorbs energy, then after the accident, only the middle horizontal tube 5, the small horizontal tube 6, the second guardrail column 3, and the The cast iron base 1 connected to the second guardrail column 3 and the damaged standpipe 11 are sufficient; if the collision energy is not completely absorbed, the middle transverse tube 5 will continue to move toward the first guardrail column after the collapse and the internal spring 10 of the middle transverse tube is fully compressed. 2, the end of the middle horizontal tube 5 will cut the hexagonal bolts 7 used to connect the middle horizontal tube 5 and the large horizontal tube 4, and then the internal spring of the large horizontal tube 4 starts to compress and absorb energy. In the end, the part of the small transverse tube 6 without the crush groove completely extends into the middle transverse tube 5, and the part of the middle transverse tube 5 without the crush groove completely enters the large transverse tube 4. While the overall guardrail absorbs a large amount of collision energy, Ideally, it shortens by more than half its length.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (9)

1. A retractable energy-absorbing road guardrail, characterized in that it comprises a cast iron base (1), a first guardrail column (2), a second guardrail column (3), two sets of horizontal pipe assemblies and a plurality of vertical pipes (11), the first guardrail column (2) and the second guardrail column (3) are respectively fixed on the cast iron base (1), and the transverse tube assembly is arranged on the first guardrail column (2) in an up-down structure Between the second guardrail column (3), the vertical pipes (11) are arranged at equal intervals between two sets of transverse pipe assemblies, and the transverse pipe assemblies include large transverse pipes (4) with the same length and structure, The middle horizontal tube (5) and the small horizontal tube (6), one end of the large horizontal tube (4) is connected with the first guardrail column (2), and the other end is connected with the middle horizontal tube (5) and the small horizontal tube (6) in turn, The other end of the small transverse tube (6) is connected to the second guardrail column (3), and the cross-sectional dimensions of the large transverse tube (4), the middle transverse tube (5), and the small transverse tube (6) are equally reduced. The outer surface of the middle horizontal pipe (5) is provided with a first crush groove (12) for energy absorption, and the total length of the first crush groove (12) accounts for half of the total length of the middle horizontal pipe (5), The outer surface of the small transverse tube (6) is provided with a second crush groove (14) for energy absorption, and the total length of the second crush groove (14) accounts for a quarter of the total length of the small transverse tube (6). ter. 2. A retractable energy-absorbing road guardrail according to claim 1, characterized in that, the inner surface of the other end of the large transverse pipe (4) is provided with a first inner convex portion, and the middle transverse pipe (4) is provided with a first inner convex portion. 5) One end is provided with a first clamping end, the size of the first clamping end is the same as the cross-sectional dimension of the large transverse tube (4), the first clamping end and the first inner convex part form a first interlocking structure, the first clamping After the connecting end is clamped with the first inner convex portion, it is fixed by hexagonal bolts (7). 3. A retractable energy-absorbing road guardrail according to claim 2, characterized in that, the inner surface of the other end of the middle horizontal pipe (5) is provided with a second inner convex portion (501), which is small A second clamping end (601) is provided at the end connecting the transverse pipe (6) with the middle transverse pipe (5). The clamping end (601) and the second inner convex portion (501) form a second interlocking structure, and the second clamping end (601) and the second inner convex portion (501) are clamped and fixed by hexagonal bolts (7). 4. A retractable energy-absorbing road guardrail according to claim 3, characterized in that, the inner parts of the large transverse pipe (4), the middle transverse pipe (5) and the small transverse pipe (6) are respectively A spring is provided, one end of the inner spring of the large transverse tube (4) is connected with the first guardrail column, the other end is connected with the outer wall of the first clamping end, and one end of the inner spring (10) of the middle transverse tube is connected with the inner wall of the first clamping end The other end is connected with the outer wall of the second clamping end, one end of the inner spring of the small transverse tube is connected with the inner wall of the second clamping end, and the other end is connected with the second guardrail upright. 5. A retractable energy-absorbing road guardrail according to claim 1, wherein the first guardrail upright (2) is provided with a first transverse pipe connector (8), and the The first horizontal pipe connecting piece (8) is provided with a first mounting hole for fixing the large horizontal pipe (4); the second guardrail upright (3) is provided with a second horizontal pipe connecting piece (9). A second mounting hole for fixing the small transverse pipe (6) is provided on the two transverse pipe connecting pieces (9). 6. A retractable energy-absorbing road guardrail according to claim 1, wherein the interior of the first guardrail upright (2) and the second guardrail upright (3) adopts a honeycomb structure, and The in-plane direction of the structural panels of the honeycomb structure is the same as the road direction. 7 . The retractable energy-absorbing road guardrail according to claim 1 , wherein the cast iron base ( 1 ) is fixed on the ground by expansion screws. 8 . 8. A retractable energy-absorbing road guardrail according to claim 1, characterized in that after the vertical pipes (11) are arranged at equal intervals, they are connected to two sets of horizontal pipe assemblies arranged up and down by spot welding. 9. A retractable energy-absorbing road guardrail according to claim 1, wherein a warning device is provided on the top of the first guardrail upright (2) and the second guardrail upright (3), respectively, The warning device includes a warning light (13) and a solar panel connected to the warning light (13).

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