Energy-absorbing anti-collision device based on mechanical metamaterial

Abstract

The utility model relates to the technical field of energy-absorbing anti-collision devices, in particular to an energy-absorbing anti-collision device based on mechanical metamaterials. The energy-absorbing anti-collision device comprises an annular energy-absorbing material protection plate, at least one hoop assembly is arranged outside the energy-absorbing material protection plate in a sleeving manner; the hoop assembly comprises a first hoop and a second hoop which are detachably connected through a fixing structure. And energy-absorbing material protection rings are mounted outside the first hoop and the second hoop. The energy-absorbing material protection plate can solve the destructive problems of stretching, shearing, splitting and the like of a joint for connecting the energy-absorbing material protection plate and a bridge pier bolt in the prior art under the action of a load, avoids the failure of the energy-absorbing material protection plate, improves the anti-collision performance of the energy-absorbing material protection plate, achieves the purpose of protecting personnel, the bridge pier and vehicles, and improves the safety of the energy-absorbing material protection plate. The device has the characteristics of convenience in mounting and dismounting, simplicity in maintenance and replacement operation and the like, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-absorbing and anti-collision devices for concrete construction, and in particular to an energy-absorbing and anti-collision device based on mechanical metamaterials. Background Art

[0002] Because the piers of elevated bridges intersect with the road surface, anti-collision guardrails are required to prevent vehicles on the road from colliding with the piers and causing traffic accidents. To address this issue, existing bridge pier anti-collision facilities using flexible energy-absorbing materials have gradually come into use. These bridge anti-collision facilities fully utilize the high toughness and aging resistance of the energy-absorbing material, using the crushing, squeezing, and friction effects of the energy-absorbing material to gradually dissipate energy and absorb the impact force of the collision.

[0003] During the installation of flexible energy-absorbing materials on bridge piers, holes are typically drilled directly into the energy-absorbing material protective plate and bolts are installed in the holes to secure the plate to the exterior of the pier. However, direct bolt installation can easily cause stretching, shearing, and splitting damage at the joints of the energy-absorbing material protective plate, destabilizing the material near the installation holes. The bolted joints of the energy-absorbing material protective plate suffer invisible damage under load, which gradually accumulates and, when accumulated to a certain level, can lead to sudden failure, posing a potential risk. Furthermore, the installation and removal process of directly securing the energy-absorbing material protective plate to the bridge pier using bolts is very cumbersome, affecting work efficiency. Utility Model Content

[0004] In order to solve the destructive problems in the prior art of the joints connected between the energy-absorbing material protective plates and the bridge pier bolts causing stretching, shearing and splitting under the action of loads, the purpose of the utility model is to provide an energy-absorbing and anti-collision device based on mechanical metamaterials. The device can eliminate the above problems, avoid the failure of the energy-absorbing material protective plates, improve the anti-collision performance of the energy-absorbing material protective plates, and achieve the purpose of protecting personnel, bridge piers and vehicles. It has the characteristics of convenient installation and disassembly, simple maintenance and replacement operations, etc., which greatly improves work efficiency.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An energy-absorbing and anti-collision device based on mechanical metamaterials, comprising an annular energy-absorbing material protective plate; the exterior of the energy-absorbing material protective plate is provided with at least one clamp assembly; the clamp assembly comprises a first clamp and a second clamp that are detachably connected via a fixed structure; and the exteriors of the first clamp and the second clamp are both provided with energy-absorbing material protective rings.

[0007] Preferably, according to the present invention, the energy-absorbing material protective plate is a ring-shaped structure with an opening, and Velcro is installed at the joints at both ends of the energy-absorbing material protective plate, and the openings of the energy-absorbing material protective plate are connected as a whole through the Velcro; the energy-absorbing material protective plate surrounds the outside of the bridge pier.

[0008] According to the preferred embodiment of the present invention, both the first clamp and the second clamp are arc-shaped structures; and the number of the clamp assemblies is two arranged in parallel.

[0009] Preferably, according to the present invention, the fixing structure includes a clamping block and a clamping slot corresponding to the clamping block; the two ends of the second clamp are respectively fixedly connected to a clamping block, and the two ends of the first clamp are respectively provided with a clamping slot; in the same clamp assembly, the clamping block on the second clamp is clamped and connected to the clamping slot of the first clamp.

[0010] Preferably, according to the present invention, both ends of the first clamp and the second clamp are provided with countersunk holes, and in the same clamp assembly, two adjacent countersunk holes are symmetrically distributed.

[0011] Preferably, according to the present invention, both ends of the energy-absorbing material protection ring are provided with through holes, the through holes are inclined and are located in the same plane as the countersunk holes on the clamp assembly corresponding to the energy-absorbing material protection ring.

[0012] Preferably, according to the present invention, a warning tape is attached to the outside of the energy-absorbing material protection ring.

[0013] Preferably, according to the present invention, rubber rings are installed on the inner sides of the first clamp and the second clamp, and the rubber rings are in close contact with the energy-absorbing material protective plate.

[0014] According to the preferred embodiment of the present invention, a plurality of insertion holes are provided at the top ends of the first clamp and the second clamp, and the plurality of insertion holes are distributed in a circular array, and energy-absorbing material protection rods are snap-connected in the insertion holes.

[0015] Preferably, according to the present invention, the cross-section of the bottom end of the energy-absorbing material protection rod is trapezoidal, and the top end of the energy-absorbing material protection rod is fixedly connected with an anti-drop cap.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The utility model uses an energy-absorbing material protective plate to surround the bridge pier, and installs a first clamp and a second clamp on the outside of the energy-absorbing material protective plate. The energy-absorbing material protective plate is fixed by the first clamp and the second clamp, so that the energy-absorbing material protective plate and the bridge pier can be fixed without directly drilling holes in the energy-absorbing material protective plate to install bolts, avoiding the occurrence of damage such as stretching, shearing and splitting of the bolt connection joint of the energy-absorbing material protective plate under the action of the load, thereby avoiding the failure of the energy-absorbing material protective plate, and further achieving the purpose of protecting personnel, bridge piers and vehicles. The utility model has the characteristics of convenient installation and disassembly, simple maintenance and replacement operations, etc., which improves work efficiency. At the same time, by installing an energy-absorbing material protection ring on the outside of the clamp, the utility model can further protect the clamp and improve the anti-collision performance of the energy-absorbing material protective plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the energy-absorbing material protection ring and the warning tape of the present invention;

[0020] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0021] In the picture:

[0022] 1. Energy-absorbing material protection plate; 2. Velcro; 3. First clamp; 4. Second clamp; 5. Energy-absorbing material protection ring; 6. Warning tape; 7. Energy-absorbing material protection rod; 8. Fixing structure; 801. Countersunk hole; 802. Slot; 803. Block; 9. Jack; 10. Anti-drop cap; 11. Rubber ring; 12. Through hole. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figures 1 to 3 The device, shown here, is an energy-absorbing and anti-collision device based on a mechanical metamaterial. The device includes an energy-absorbing material protective plate 1, with two clamp assemblies mounted on the exterior. Each clamp assembly includes a first clamp 3 and a second clamp 4. The ends of the first clamp 3 in the same clamp assembly are detachably connected to the ends of the second clamp 4 via a fixing structure 8. Energy-absorbing material protective rings 5 are mounted on the exterior of each of the first and second clamps 3 and 4. The first and second clamps 3 and 4 are both arc-shaped structures, with the first and second clamps 3 and 4 arranged linearly up and down.

[0025] Specifically, the energy-absorbing material protective plate 1 surrounds the outside of the bridge pier; a first clamp 3 and a second clamp 4 are installed on the outside of the energy-absorbing material protective plate, and the energy-absorbing material protective plate 1 is fixed by the first clamp 3 and the second clamp 4. There is no need to directly drill holes in the energy-absorbing material protective plate 1 to install bolts, so that the energy-absorbing material protective plate 1 and the bridge pier can be fixedly connected, thereby avoiding the bolt connection joints of the energy-absorbing material protective plate 1 from being damaged by the load, such as stretching, shearing and splitting, thereby avoiding the failure of the energy-absorbing material protective plate 1, and thus achieving the purpose of protecting personnel, bridge piers and vehicles. Moreover, when the energy-absorbing material protective plate 1 needs to be disassembled and replaced, the clamp assembly can be removed to release the fixation of the energy-absorbing material protective plate 1. The operation is very flexible and convenient, which greatly improves work efficiency. By installing an energy-absorbing material protective ring 5 on the outside of the clamp, the clamp can be further protected, and the anti-collision performance of the energy-absorbing material plate 1 can be improved.

[0026] like Figure 1 and Figure 2 As shown, the energy absorbing material protection plate 1 is annular in structure. Velcro 2 is installed at the joints at both ends of the energy absorbing material protection plate 1 to facilitate the initial fixation of the energy absorbing material protection plate 1 and the installation of the first clamp 3 and the second clamp 4.

[0027] like Figure 3 As shown, the fixing structure 8 includes a block 803 and a slot 802. A block 803 is fixedly connected to each end of the second clamp 4, and a slot 802 is defined at each end of the first clamp 3. The four blocks 803 engage with adjacent slots 802. Countersunk holes 801 are defined at both ends of the first and second clamps 3, 4, with adjacent countersunk holes 801 symmetrically distributed.

[0028] Specifically, the first and second clamps 3 and 4 are simultaneously brought closer to the center of the energy-absorbing material protective plate 1 from both sides, and the slots 802 on the first clamp 3 are aligned with the blocks 803 on the second clamp 4 until the blocks 803 engage with the adjacent slots 802. This quickly and easily secures the first and second clamps 3 and 4. Bolts are then inserted through the countersunk holes 801 on the first and second clamps 3 and 4 to further secure them, increasing the stability of the fixation.

[0029] like Figure 3 As shown, both ends of the energy-absorbing material protection ring 5 are provided with through holes 12, which are inclined and located in the same plane as the countersunk hole 801. The bolts are slid inward from the through holes 12 to prevent the energy-absorbing material protection ring 5 from obstructing the operation of the bolts to fix the first clamp 3 and the second clamp 4.

[0030] like Figures 1 to 3As shown, the energy-absorbing material protection ring 5 is affixed with warning tape 6. Rubber rings 11 are installed inside the first and second clamps 3 and 4, and they press inward against the energy-absorbing material protection plate 1. The warning tape 6 provides an early warning, alerting passing vehicles. The rubber rings 11 increase the friction between the first and second clamps 3 and 4 and the energy-absorbing material protection plate 1, thus strengthening the secure fixation of the first and second clamps 3 and 4 to the energy-absorbing material protection plate 1.

[0031] like Figure 3 As shown, the top ends of the first clamp 3 and the second clamp 4 are each provided with a plurality of sockets 9, and the plurality of sockets 9 are distributed in a circular array. An energy-absorbing material protection rod 7 is engaged in the socket 9, and the cross-section of the bottom end of the energy-absorbing material protection rod 7 is a trapezoidal structure. An anti-slip cap 10 is fixedly connected to the top end of the energy-absorbing material protection rod 7. The energy-absorbing material protection rod 7 is inserted downward into the sockets 9 on the first clamp 3 and the second clamp 4, so that the energy-absorbing material protection rod 7 passes through the upper and lower sockets 9. When a moving vehicle loses control and collides with a bridge pier, the energy-absorbing material protection rod 7 can absorb a certain amount of impact kinetic energy through pressure feeding, thereby gradually reducing the impact kinetic energy of the vehicle and alleviating the impact of the vehicle on the energy-absorbing material protection plate 1, thereby reducing damage to the vehicle, thereby achieving the purpose of protecting personnel, bridge piers and vehicles.

[0032] The working principle of this utility model is:

[0033] First, the energy-absorbing material protective plate 1 is placed around the bridge pier, and then the first clamp 3 and the second clamp 4 are simultaneously moved closer to the center from both sides of the energy-absorbing material protective plate 1. At the same time, the slot 802 on the first clamp 3 is aligned with the block 803 on the second clamp 4 until the block 803 is engaged in the adjacent slot 802, thereby quickly and preliminarily fixing the first clamp 3 and the second clamp 4. The operation is quick and convenient.

[0034] Secondly, bolts are used to penetrate the countersunk holes 801 on the first clamp 3 and the second clamp 4, so as to further fix the first clamp 3 and the second clamp 4, and then the energy-absorbing material protection plate 1 is fixed by the first clamp 3 and the second clamp 4. There is no need to directly drill holes in the energy-absorbing material protection plate 1 to install bolts, so that the connection between the energy-absorbing material protection plate and the bridge pier can be achieved, and the bolt connection joints of the energy-absorbing material protection plate 1 are prevented from being stretched, sheared, split, etc. due to the action of the load, thereby avoiding the failure of the energy-absorbing material protection plate 1, and thus achieving the purpose of protecting personnel, bridge piers and vehicles. In addition, it is convenient to install and disassemble, and the maintenance and replacement operations are simple, which improves work efficiency.

[0035] Furthermore, an energy-absorbing material protective ring 5 is installed on the exterior of the clamp to further protect the clamp and enhance the crashworthiness of the energy-absorbing material protective plate 1. An energy-absorbing material protective rod 7 is inserted downwardly into the sockets 9 on the first clamp 3 and the second clamp 4, extending through both sockets 9. When a moving vehicle loses control and collides with a bridge pier, the energy-absorbing material protective rod 7 absorbs a certain amount of the impact kinetic energy through pressure feedback, thereby gradually reducing the vehicle's impact energy and mitigating the impact on the energy-absorbing material protective plate 1, thereby minimizing damage to the vehicle and protecting personnel, bridge piers, and vehicles.

[0036] The above-described embodiments are merely descriptions of preferred implementation methods of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An energy-absorbing and anti-collision device based on mechanical metamaterials, characterized in that: The energy-absorbing and anti-collision device comprises an annular energy-absorbing material protective plate (1); the energy-absorbing material protective plate (1) is provided with at least one clamp assembly on its exterior; the clamp assembly comprises a first clamp (3) and a second clamp (4) which are detachably connected via a fixing structure (8); and energy-absorbing material protective rings (5) are installed on the exteriors of the first clamp (3) and the second clamp (4).

2. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 1, characterized in that: The energy-absorbing material protection plate (1) is a ring-shaped structure with an opening. Velcro (2) is installed at the joints at both ends of the energy-absorbing material protection plate (1), and the openings of the energy-absorbing material protection plate (1) are connected as a whole through the Velcro (2); the energy-absorbing material protection plate (1) surrounds the outside of the bridge pier.

3. The energy absorption and collision avoidance device based on mechanical metamaterials according to claim 1, characterized in that: The first hoop (3) and the second hoop (4) are both arc-shaped structures; The number of the clamp assemblies is two and they are arranged in parallel.

4. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 1 or 3, characterized in that: The fixing structure (8) comprises a clamping block (803) and a clamping slot (802) corresponding to the clamping block (803); Both ends of the second hoop (4) are fixedly connected to a clamping block (803), and both ends of the first hoop (3) are provided with a clamping slot (802); in the same hoop assembly, the clamping block (803) on the second hoop (4) is clamped and connected to the clamping slot (802) of the first hoop (3).

5. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 1, characterized in that: Both ends of the first clamp (3) and the second clamp (4) are provided with countersunk holes (801); in the same clamp assembly, two adjacent countersunk holes (801) are symmetrically distributed.

6. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 5, characterized in that: Through holes (12) are provided at both ends of the energy-absorbing material protection ring (5); the through holes (12) are inclined and are located in the same plane as the countersunk holes (801) on the clamp assembly corresponding to the energy-absorbing material protection ring (5).

7. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 1, characterized in that: A warning tape (6) is adhered to the outside of the energy-absorbing material protection ring (5).

8. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 1, characterized in that: A rubber ring (11) is installed on the inner side of the first clamp (3) and the second clamp (4), and the rubber ring (11) is in close contact with the energy-absorbing material protection plate (1).

9. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 1, characterized in that: The top ends of the first hoop (3) and the second hoop (4) are each provided with a plurality of jacks (9), the jacks (9) being distributed in a circular array, and energy-absorbing material protection rods (7) being snap-connected within the jacks (9).

10. The energy-absorbing and anti-collision device based on mechanical metamaterials according to claim 9, characterized in that: The cross-section of the bottom end of the energy-absorbing material protection rod (7) is trapezoidal, and the top end of the energy-absorbing material protection rod (7) is fixedly connected with an anti-drop cap (10).

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