An assembled welding-free anti-collision guardrail, mounting tool and mounting method thereof

Abstract

This invention belongs to the field of road guardrail technology, specifically relating to a prefabricated, weld-free crash barrier, including posts and guardrail panels. A buffer cylinder is added between the posts and guardrail panels. The buffer cylinder has a vertically continuous cylindrical structure. The buffer cylinder is fixedly connected to the posts by a first bolt, and the buffer cylinder is fixedly connected to the guardrail panels by a second bolt. The buffer cylinder has an elongated slot through which the second bolt passes, and the length of the elongated slot is along the circumference of the buffer cylinder. The prefabricated, weld-free crash barrier provided by this invention can reduce the damage and displacement of the posts during an impact, and reduce the difficulty of subsequent maintenance. This invention also includes installation tools and installation methods.

Description

Technical Field

[0001] This invention belongs to the field of road guardrail technology, specifically relating to a prefabricated, weld-free crash barrier, installation tools, and installation method. Background Technology

[0002] As a key safety protection facility for traffic infrastructure such as roads and bridges, crash barriers are widely installed on both sides of roads, in the median strip, or at the edge of bridges. Their core function is to prevent vehicles from running off the road or crossing the median strip, reducing casualties and property damage caused by traffic accidents. At the same time, they play an effective guiding role for out-of-control vehicles and reduce the risk of secondary accidents.

[0003] Taking steel plate crash barriers as an example, the process involves pre-casting fixed posts at the designed locations on the road, and then assembling the guardrail panels using these posts. Currently, the guardrail panels are directly installed on the posts, lacking a buffer space between them. When a vehicle collision occurs, the posts cast on the ground are easily damaged, increasing the difficulty of repair. Furthermore, during actual assembly, due to certain deviations in the distribution of the posts or the curvature of the road, the guardrail panels need to be adapted to a certain curvature during assembly. Because the guardrail panels have a certain degree of metal elasticity, installation mainly relies on manual pushing to press the guardrail panels against the posts. If there is a significant deviation or a large curvature in the road, the distance between the guardrail panels, especially at the ends, and the posts will be large. Manual pushing is not only laborious but also highly dangerous. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a prefabricated, weld-free crash barrier, installation tools, and installation method, which can reduce the damage and displacement of the posts when an impact occurs, reduce the difficulty of subsequent maintenance, and provide an easy-to-install tool and method that reduces human intervention and improves safety during installation.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A prefabricated, weld-free crash barrier includes posts and guardrail panels. A buffer cylinder is added between the posts and guardrail panels. The buffer cylinder has a cylindrical structure that runs vertically through the posts. The buffer cylinder is fixedly connected to the posts by a first bolt, and the buffer cylinder is fixedly connected to the guardrail panels by a second bolt. The buffer cylinder is provided with a long slot for the second bolt to pass through, and the length of the long slot is arranged along the circumference of the buffer cylinder.

[0007] The guardrail is a corrugated plate, and the long slots on the buffer cylinder are aligned with the troughs of the guardrail. The troughs of the guardrail also have through holes for the second bolt to pass through.

[0008] The buffer cylinder has a recessed limiting groove on the side that abuts against the column. The length of the limiting groove is along the axial direction of the buffer cylinder. The buffer cylinder forms a limiting fit with the column through the limiting groove. The limiting groove and the column are provided with through holes. The first bolt fixes the buffer cylinder and the column together through the through holes.

[0009] An installation tool for a prefabricated, weld-free crash barrier includes a base and a support column. A pull-out seat is provided on the support column, and a sliding seat is connected to the pull-out seat via a slide rail. A driving device is provided on the pull-out seat, and the sliding seat moves relative to the pull-out seat by means of the driving device. A traction rope is connected between the pull-out seat and the guardrail panel. A traction groove is provided on the sliding seat, and a protruding traction block is provided on the traction rope. The traction groove and the traction block form a hook connection.

[0010] The driving device includes a push hook and a push telescopic cylinder. The push hook is hinged to the pull seat. The sliding seat has multiple lifting holes arranged in the horizontal direction. The lifting holes are elongated holes arranged in the vertical direction. Pull rods are arranged in the lifting holes. The push hook swings with the help of the push telescopic cylinder. The push hook swings back and forth and pushes the pull rods one by one to move the sliding seat.

[0011] The drive device further includes a return limit mechanism, which includes a support base fixedly connected to the pull seat and a limit hook hinged to the support base. When the sliding seat moves forward, the pull rod pushes the limit hook up with the arc surface on the back of the limit hook. When the sliding seat returns, the pull rod and the groove on the front of the limit hook form a hook-and-limit mechanism.

[0012] The support column is provided with an abutment rod, which forms an abutment limit with the column. The front end of the pull seat is also provided with an anti-detachment block, which has a wedge-shaped structure and a through groove for the traction rope to pass through.

[0013] The front end of the pull seat is provided with a connecting seat, and the connecting seat is provided with multiple sets of connecting rods. The free end of the connecting rod is provided with a connecting hook. The connecting hook is hinged to the connecting rod and swings by means of the connecting telescopic cylinder on the connecting rod. The connecting hook forms a hook limit with the upper and lower edges of the guardrail.

[0014] The connecting hook includes a fixed plate and an elastic plate. The fixed plate is fitted and fixed on the hinge shaft and driven to swing by the telescopic end of the connecting telescopic cylinder. The elastic plate is set on one side of the fixed plate and forms a hook-shaped structure. Adjacent elastic plates are set independently and abut against the guardrail plate respectively.

[0015] An installation method for a prefabricated, weld-free crash barrier includes the following steps:

[0016] S1. Move the installation tool to the position where it needs to be pulled and make contact with the column at that position. At this time, the upper end of the column is in contact with the connector and is located between multiple sets of connector rods.

[0017] S2. Connect the traction rope between the sliding seat and the guardrail, drive the sliding seat to move, pull the guardrail to the hook in the swing position, and after entering the hooking range of the hook, use the hook to limit the guardrail.

[0018] S3. Swing the hook inward to push the guardrail close to the buffer cylinder on the post, and use the second bolt to fix the buffer cylinder to the guardrail.

[0019] The beneficial effects of this invention are:

[0020] The present invention employs a buffer cylinder, which can reduce the damage and displacement of the column when an impact occurs, reduce the difficulty of subsequent maintenance, and provide a convenient installation tool and method, reducing manpower and improving safety during installation. Attached Figure Description

[0021] Figure 1 This is a top view of the anti-collision guardrail of the present invention;

[0022] Figure 2 This is a schematic diagram of the buffer cylinder structure;

[0023] Figure 3 This is a structural diagram of the installation tool;

[0024] Figure 4 A schematic diagram of the pull-out seat from a top-down view;

[0025] In the attached diagram, 1. Post, 2. Guardrail plate, 3. Buffer cylinder, 4. First bolt, 5. Second bolt, 6. Long slot, 7. Limiting slot, 8. Base, 9. Support column, 10. Pull-out seat, 11. Sliding seat, 12. Traction rope, 13. Traction groove, 14. Push hook, 15. Push telescopic cylinder, 16. Lifting hole, 17. Pull-out rod, 18. Support seat, 19. Limiting hook, 20. Abutment rod, 21. Anti-detachment block, 22. Connecting seat, 23. Connecting rod, 24. Connecting telescopic cylinder, 25. Fixing plate, 26. Elastic plate. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] Specific embodiment 1, such as Figure 1 and Figure 2As shown, the present invention is an assembled, weld-free crash barrier, including a post 1 and a guardrail panel 2. A buffer cylinder 3 is added between the post 1 and the guardrail panel 2. The buffer cylinder 3 has a cylindrical structure that runs vertically through the post. The buffer cylinder 3 is fixedly connected to the post 1 by a first bolt 4, and the buffer cylinder 3 is fixedly connected to the guardrail panel 2 by a second bolt 5. The buffer cylinder 3 is provided with a long slot 6 for the second bolt 5 to pass through. The length of the long slot 6 is arranged along the circumference of the buffer cylinder 3.

[0028] like Figure 1 and Figure 2 As shown, when the guardrail is impacted, the buffer cylinder 3 first deforms to absorb the impact energy. When the vehicle is guided along the guardrail, it may cause the guardrail plate 2 to move in translation. At this time, due to the long strip structure of the long slot 6, if the second bolt 5 is not located at the end of the long slot 6, when the guardrail plate 2 moves in translation, it can still provide deformation space for the deformation displacement of the guardrail plate 2. Even if the second bolt 5 is located at the end of the long slot 6, it can still reduce the force on the column 1 by pulling the buffer cylinder 3.

[0029] Furthermore, such as Figure 3 As shown by the dashed line, the guardrail plate 2 is a corrugated plate, and the long slot 6 on the buffer cylinder 3 is aligned with the trough of the guardrail plate 2. The trough of the guardrail plate 2 is also provided with a through hole for the second bolt 5 to pass through.

[0030] The second bolt 5 is positioned at the trough of the corrugated plate. This allows for direct contact between the trough and the buffer cylinder 3, and also enables direct contact with the elongated slot 6. Once the corrugated plates are properly connected, the matching nut and washer of the second bolt 5, such as... Figure 1 As shown, located inside the arc-shaped buffer cylinder 3, the nut and washer abut against the side wall of the buffer cylinder 3 on both sides, with a gap in the middle. Thanks to the elasticity of the washer and the long slot 6, the guardrail plate 2 can maintain an effective connection even when it expands and contracts due to temperature changes. When a collision occurs, the troughs of the corrugated plate directly push against the long slot 6, causing the buffer cylinder 3 at the long slot 6 to deform and change its curvature. At this point, the second bolt 5 loosens to some extent, and the force is more shared by the other connected posts 1, thus reducing the force on the affected post 1, preventing serious damage to the post 1, and reducing subsequent maintenance costs.

[0031] Furthermore, a recessed limiting groove 7 is provided on the side of the buffer cylinder 3 that abuts against the column 1. The length direction of the limiting groove 7 is arranged along the axial direction of the buffer cylinder 3. The buffer cylinder 3 forms a limiting fit with the column 1 by means of the limiting groove 7. A through hole is provided in the limiting groove 7 and on the column 1. The first bolt 4 fixes the buffer cylinder 3 and the column 1 together by means of the through hole.

[0032] The limiting groove 7 and the column 1 form a wrapping, making the connection between the buffer cylinder 3 and the column 1 more stable.

[0033] In specific embodiment 2, the present invention also includes an installation tool for the crash barrier 2. The installation tool includes a base 8 and a support column 9. A pull-out seat 10 is provided on the support column 9. A sliding seat 11 is connected to the pull-out seat 10 via a slide rail. A driving device is provided on the pull-out seat 10. The sliding seat 11 moves relative to the pull-out seat 10 via the driving device. A traction rope 12 is connected between the pull-out seat 10 and the barrier 2. A traction groove 13 is provided on the sliding seat 11. A protruding traction block is provided on the traction rope 12. The traction groove 13 and the traction block form a hook connection.

[0034] A guardrail panel 2 is quite long, and usually requires multiple sets of posts 1. After one or two sets of posts 1 are installed, subsequent posts 1 may not be able to fit effectively with the guardrail panel 2 due to installation deviations and road curvatures. Therefore, a certain pulling force is used to deform the guardrail panel 2 to complete the installation. The sliding seat 11 moves intermittently relative to the pulling seat 10 by means of a reciprocating oscillating drive device, so that the guardrail panel 2 deforms intermittently, which is convenient for personnel to observe and avoids pulling it into place quickly at once, thus preventing damage to the guardrail panel 2.

[0035] Furthermore, such as Figure 3 and Figure 4 As shown, the driving device includes a push hook 14 and a push telescopic cylinder 15. The push hook 14 is hinged to the pull seat 10. The sliding seat 11 is provided with a plurality of lifting holes 16 along the horizontal direction. The lifting holes 16 are elongated holes arranged along the vertical direction. Pull rods 17 are provided in the lifting holes 16. The push hook 14 swings with the help of the push telescopic cylinder 15. The push hook 14 swings back and forth and pushes the pull rods 17 one by one, so that the sliding seat 11 moves.

[0036] The drive device further includes a return limit mechanism, which includes a support base 18 fixedly connected to the pull seat 10 and a limit hook 19 hinged to the support base 18. When the sliding seat 11 moves forward, the pull rod 17 pushes the limit hook 19 up with the arc surface on the back of the limit hook 19. When the sliding seat 11 returns, the pull rod 17 and the groove on the front of the limit hook 19 form a hook limit.

[0037] like Figure 3As shown, when the sliding seat 11 moves to the left, the push hook 14 swings counterclockwise, and its inner groove hooks with the pull rod 17, causing the pull rod 17 to push the sliding seat 11 to move. At the same time, another set of pull rods 17 abuts against the limit hook 19 and pushes the limit hook 19 up. When the push hook 14 swings to its limit position, the other set of pull rods 17 has passed the limit hook 19, and the limit hook 19 falls onto the plane of the pull seat 10 under its own gravity. Then the push hook 14 resets clockwise, and the arc structure of the push hook 14 lifts the pull rod 7 upward to avoid obstructing the reset of the push hook 14. At this time, the limit hook 19 hooks with the pull rod 17 to prevent the sliding seat 11 from moving to the right.

[0038] By means of the reciprocating swing of the push hook 14, the sliding seat 11 intermittently pulls the guardrail 2.

[0039] The support column 9 is provided with an abutment rod 20, which forms an abutment limit with the column 1. The front end of the pull seat 10 is also provided with an anti-detachment block 21, which has a wedge-shaped structure and a through groove for the traction rope 12 to pass through. When the sliding seat 11 moves to near the extreme position on the left, since the traction rope 12 is provided with a spherical traction block, and the through groove of the anti-detachment block 21 is smaller than the traction block, when the traction rope 12 without the traction block passes through, the traction rope 12 is located in the through groove. When the traction block is present, the traction block passes along the trajectory of the through groove from the wedge-shaped surface of the anti-detachment block 21, wherein the height of the traction block is higher than the trajectory of the traction rope 12, so that the traction rope 12 tends to embed into the through groove.

[0040] When the sliding seat 11 moves to near the left limit position, personnel can assist in ensuring that the traction block is embedded in the hook-shaped part behind the anti-detachment block 21, so that the traction block and the anti-detachment block 21 abut against each other to form a limit, preventing the traction rope 12 from pulling backward under the pull of the guardrail 2. Then, the limit hook 19 is manually lifted and the push hook 14 is released. At this time, the sliding seat 11 can be manually reset, and a suitable position can be selected from the multiple traction blocks set on the traction rope 12 and engaged with the slit-shaped traction groove 13 to carry out the next cycle of pulling operation.

[0041] Furthermore, such as Figure 3 and Figure 4 As shown, the front end of the pull-out seat 10 is provided with a connecting seat 22, and the connecting seat 22 is provided with multiple sets of connecting rods 23. The free end of the connecting rod 23 is provided with a connecting hook. The connecting hook is hinged to the connecting rod 23 and swings by means of the connecting telescopic cylinder 24 on the connecting rod 23. The connecting hook forms a hook limit with the upper and lower edges of the guardrail 2.

[0042] The connecting hook includes a fixed piece 25 and an elastic piece 26. The fixed piece 25 is fitted and fixed on the hinge shaft and driven to swing by the telescopic end of the connecting telescopic cylinder 24. The elastic piece 26 is arranged on one side of the fixed piece 25 and forms a hook-shaped structure. Adjacent elastic pieces 26 are independently arranged and abut against the guardrail plate 2 respectively.

[0043] The spacing of the connecting rods 23 on the connecting seat 22 is sufficient to accommodate the column 1, and the connecting seat 22 is provided with through holes for the traction rope 12 to pass through. However, since the traction rope 12 is tied to the guardrail 2 or pulled through the bolt holes of the guardrail 2, the guardrail 2 may be twisted due to force deviation. Therefore, when the guardrail 2 is close, it is gripped by the connecting hook to ensure the reliability of the grip and avoid accidents when installing the second bolt 5. Each set of connecting hooks includes multiple fixing plates 25 and elastic plates 26. The fixing plates 25 are connected to each other and swing relative to the connecting rod 23 by means of the hinge shaft under the push of the connecting telescopic cylinder 24. The elastic plates 26 are independently formed into finger-like structures, so that a set of connecting hooks makes multiple contacts with the guardrail 2, avoiding stress concentration that could damage the surface of the guardrail 2.

[0044] In specific embodiment 3, the present invention also includes an installation method, which includes the following steps.

[0045] S1. Move the installation tool to the position where it needs to be pulled. The base 8 is equipped with a traveling wheel, and the base 8 on the side of the small wheel of the traveling wheel is equipped with a recessed clearance groove, which allows the column 1 to enter the side of the small wheel and make the abutting rod 20 abut against the column 1 at this position. At this time, the upper end of the column 1 abuts against the connecting seat 22 and is located between multiple sets of connecting rods 23.

[0046] S2. Connect the traction rope 12 between the sliding seat 11 and the guardrail 2, drive the sliding seat 11 to move, pull the guardrail 2 to the hook in the swinging state, and after entering the hooking range of the hook, use the hook to limit the guardrail 2.

[0047] S3. The hook swings inward to push the guardrail 2 close to the buffer cylinder 3 on the post 1, and the buffer cylinder 3 is fixed to the guardrail 2 with the help of the second bolt 5.

Claims

1. A prefabricated, weld-free crash barrier, comprising posts (1) and guardrail panels (2), characterized in that: A buffer cylinder (3) is added between the column (1) and the guardrail (2). The buffer cylinder (3) has a cylindrical structure that runs vertically through the column. The buffer cylinder (3) is fixedly connected to the column (1) by means of a first bolt (4). The buffer cylinder (3) is fixedly connected to the guardrail (2) by means of a second bolt (5). The buffer cylinder (3) is provided with a long slot (6) through which the second bolt (5) passes. The length direction of the long slot (6) is set along the circumferential direction of the buffer cylinder (3).

2. The prefabricated, weld-free crash barrier according to claim 1, characterized in that: The guardrail plate (2) is a corrugated plate. The long slot (6) on the buffer cylinder (3) is aligned with the trough of the guardrail plate (2). The guardrail plate (2) also has a through hole for the second bolt (5) to pass through at the trough.

3. The prefabricated, weld-free crash barrier according to claim 1, characterized in that: The buffer cylinder (3) is provided with a recessed limiting groove (7) on the side that abuts against the column (1). The length direction of the limiting groove (7) is arranged along the axial direction of the buffer cylinder (3). The buffer cylinder (3) forms a limiting fit with the column (1) by means of the limiting groove (7). A through hole is provided in the limiting groove (7) and on the column (1). The first bolt (4) fixes the buffer cylinder (3) and the column (1) by means of the through hole.

4. An installation tool for a prefabricated, weld-free crash barrier, used for installing the crash barrier as described in claim 1, characterized in that: The installation tool includes a base (8) and a support column (9). A pull seat (10) is provided on the support column (9). A sliding seat (11) is connected to the pull seat (10) via a slide rail. A driving device is provided on the pull seat (10). The sliding seat (11) moves relative to the pull seat (10) via the driving device. A traction rope (12) is connected between the pull seat (10) and the guardrail (2). A traction groove (13) is provided on the sliding seat (11). A protruding traction block is provided on the traction rope (12). The traction groove (13) and the traction block form a hook connection.

5. The installation tool according to claim 4, characterized in that: The driving device includes a push hook (14) and a push telescopic cylinder (15). The push hook (14) is hinged to the pull seat (10). The sliding seat (11) is provided with a plurality of lifting holes (16) in the horizontal direction. The lifting holes (16) are elongated holes in the vertical direction. Pull rods (17) are provided in the lifting holes (16). The push hook (14) swings with the help of the push telescopic cylinder (15). The push hook (14) swings back and forth and pushes the pull rods (17) one by one, so that the sliding seat (11) moves.

6. The installation tool according to claim 5, characterized in that: The drive device also includes a return limit mechanism, which includes a support base (18) fixedly connected to the pull seat (10) and a limit hook (19) hinged to the support base (18). When the sliding seat (11) moves forward, the pull rod (17) pushes the limit hook (19) up with the arc surface on the back of the limit hook (19). When the sliding seat (11) returns, the pull rod (17) and the groove on the front of the limit hook (19) form a hook limit.

7. The installation tool according to claim 4, characterized in that: The support column (9) is provided with an abutment rod (20), which forms an abutment limit with the column (1). The front end of the pull seat (10) is also provided with an anti-detachment block (21), which has a wedge-shaped structure and a through groove for the traction rope (12) to pass through.

8. The installation tool according to claim 4, characterized in that: The front end of the pull seat (10) is provided with a connecting seat (22), and the connecting seat (22) is provided with multiple sets of connecting rods (23). The free end of the connecting rod (23) is provided with a connecting hook. The connecting hook is hinged to the connecting rod (23) and swings by means of the connecting telescopic cylinder (24) on the connecting rod (23). The connecting hook forms a hook limit with the upper and lower edges of the guardrail (2).

9. The installation tool according to claim 4, characterized in that: The connecting hook includes a fixed piece (25) and an elastic piece (26). The fixed piece (25) is fixed on the hinge shaft and driven to swing by the telescopic end of the connecting telescopic cylinder (24). The elastic piece (26) is set on one side of the fixed piece (25) and forms a hook-shaped structure. Adjacent elastic pieces (26) are set independently and abut against the guardrail plate (2) respectively.

10. An installation method for a prefabricated, weld-free crash barrier, based on the installation tool as described in claim 4, characterized in that: Includes the following steps, S1. Move the installation tool to the position where it needs to be pulled and make contact with the column (1) at that position. At this time, the upper end of the column (1) is in contact with the connector (22) and is located between multiple sets of connector rods (23). S2. Connect the traction rope (12) between the sliding seat (11) and the guardrail (2), drive the sliding seat (11) to move, pull the guardrail (2) to the hook in the open state, and after entering the hooking range of the hook, use the hook to limit the guardrail (2); S3. The hook swings inward to push the guardrail (2) closer to the buffer cylinder (3) on the post (1), and the buffer cylinder is fixed to the guardrail (2) with the help of the second bolt (5).

Images