NPR cable anti-beam-falling device

Abstract

The application discloses an NPR cable anti-falling beam device, which comprises a fixed end anchor head (1) and a tensioning end anchor head (2), the tensioning end anchor head (2) is fixedly provided with a tensioning end anchoring plate (4) on one side, and the fixed end anchor head (1) and the tensioning end anchor head (2) are connected with a cable body (3). The tensioning end anchor head (2) is provided with a tensioning end anchoring piece (5), the cable body (3) between the tensioning end anchoring plate (4) and the tensioning end anchoring piece (5) is sleeved with a tensioning end spring (7), or the middle part of the cable body (3) is provided with a broken structure, the broken part is sleeved through a connecting cylinder (10), and the two ends of the broken part are connected through a connecting spring (11). The application has the advantages of reasonable structure, good impact resistance, excellent energy absorption performance, no brittle fracture phenomenon even when subjected to an external load with a large impact force such as an earthquake, and effective prevention of the falling beam.

Description

Technical Field

[0001] This application relates to a beam-prevention device, and more particularly to an NPR cable beam-prevention device, belonging to the field of bridge cable technology. Background Technology

[0002] Bridge anti-fall measures are a key technology for ensuring the safety and stability of bridges under external forces such as earthquakes. Their purpose is to prevent bridge beams from falling during disasters like earthquakes, avoiding serious loss of life and property, and playing an irreplaceable role in ensuring the smooth flow of traffic. Traditional bridge anti-fall cables mostly use ordinary steel strand cables, steel tie rod structures, and iron chain structures. These structures have revealed some significant defects in long-term engineering applications, mainly manifested in high tensile stiffness and a lack of energy absorption function under external forces. When subjected to sudden, large-impact external loads such as earthquakes, they are prone to brittle fracture because they cannot effectively buffer energy through their own deformation. Once the cable breaks, the anti-fall device fails, and the bridge beam may fall under the force of the earthquake, causing a serious bridge collapse. For a long time, there has been a lack of a new type of anti-fall device with good impact resistance and excellent energy absorption performance to solve this technical problem. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings and deficiencies of existing anti-beam-falling devices, which have high tensile stiffness, lack energy absorption function under external force, and are prone to brittle fracture under sudden, large-impact external loads such as earthquakes. This application provides an NPR cable-stayed anti-beam-falling device with a reasonable structure, good impact resistance, excellent energy absorption performance, and will not brittle fracture even under sudden, large-impact external loads such as earthquakes, thus effectively preventing beam falls.

[0004] To achieve the above-mentioned application objectives, the technical solution of this application is: an NPR cable anti-falling beam device, including a fixed end anchor head and a tensioning end anchor head. A tensioning end anchor plate is fixedly installed on one side of the tensioning end anchor head. A cable body is connected between the fixed end anchor head and the tensioning end anchor head. A tensioning end anchor is installed on the tensioning end anchor head. A tensioning end spring is sleeved on the cable body between the tensioning end anchor plate and the tensioning end anchor, or the middle part of the cable body is set as a disconnected structure. The disconnected part is sleeved by a connecting sleeve, and the two ends of the disconnected part are connected by a connecting spring.

[0005] Furthermore, a small stop plate is provided on the side of the tensioning end anchor near the tensioning end spring, one end of the tensioning end spring is mounted on the small stop plate or pressed against the surface of the small stop plate, and a large stop plate is provided on the side of the tensioning end anchor plate near the tensioning end spring, the other end of the tensioning end spring is mounted on the large stop plate or pressed against the surface of the large stop plate.

[0006] Furthermore, the tensioning end spring is a conical spring or a butterfly spring, with the smaller diameter end of the conical spring located on the outside of the tensioning end anchor head.

[0007] Furthermore, a fixed-end anchor or a fork-shaped connecting device is installed on the fixed-end anchor head.

[0008] Furthermore, the fork-ear connecting device includes a fork-ear, a fork-ear connector, and a bolt. The end of the fixed-end anchor head is fixedly provided with a fork-ear, and the fork-ear is connected to the fork-ear connector through the bolt.

[0009] Furthermore, a fixed-end protective cover is provided at the end of the fixed-end anchor head and around the fixed-end anchor.

[0010] Furthermore, a tensioning end protective cover is provided around the tensioning end anchor head and anchor.

[0011] Furthermore, one end of the connecting cylinder is connected to one end of the connecting rod via a connecting nut, and the other end of the connecting rod is connected to the fixed end anchor head via an adjusting cylinder, or the other end of the connecting rod is connected to the cable body fixed to the fixed end anchor head via an adjusting cylinder.

[0012] Furthermore, the connecting spring is sleeved on the outer circumference of the cable near the break point, and the connecting cylinder is disposed on the outer circumferential surface of the connecting spring.

[0013] The beneficial effects of this application are: 1. The base material of the cable in this application is made of NPR material, which utilizes the negative Poisson's ratio of NPR. When subjected to tension, it does not produce obvious necking, has high strength and toughness, good impact resistance, and excellent shear resistance. It can absorb and dissipate energy through its own deformation.

[0014] 2. This application employs a spring structure on the cable body for energy absorption and buffering. The spring structure is used for the first stage of energy absorption and buffering, and then the elongation of the NPR with its excellent performance is used to consume energy, thereby playing a further role in buffering and energy absorption. When applied to the anti-falling beam structure, it achieves a very good anti-falling beam effect.

[0015] 3. This application has a reasonable structure, is easy to install and maintain, has good impact resistance, and excellent energy absorption performance. Even when subjected to sudden and large-impact external loads such as earthquakes, it will not experience brittle fracture, effectively preventing beam collapse. It has a promising prospect for widespread application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of this application.

[0017] Figure 2 yes Figure 1A magnified view of a portion of the image.

[0018] Figure 3 This is a schematic diagram of the structure of the second embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the third embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the fourth embodiment of this application.

[0021] Figure 6 This is a structural schematic diagram of the fifth embodiment of this application.

[0022] Figure 7 yes Figure 6 A magnified view of a portion of the image.

[0023] In the diagram: 1. Fixed end anchor head; 2. Tensioning end anchor head; 3. Cable body; 4. Tensioning end anchor plate; 5. Tensioning end anchor; 6. Fixed end anchor; 7. Tensioning end spring; 7-1. Conical spring; 7-2. Butterfly spring; 8. Small stop plate; 9. Large stop plate; 10. Connecting cylinder; 11. Connecting spring; 12. Connecting nut; 13. Adjusting cylinder; 14. Connecting rod; 15. Fork lug; 16. Fork lug connector; 17. Bolt pin; 18. Tensioning end protective cover; 19. Fixed end protective cover. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See Figures 1 to 7 This application discloses an NPR cable-stayed anti-falling beam device, comprising a fixed-end anchor head 1 and a tension-end anchor head 2. A tension-end anchor plate 4 is fixedly installed on one side of the tension-end anchor head 2, and a cable body 3 is connected between the fixed-end anchor head 1 and the tension-end anchor head 2. The device is characterized in that: a tension-end anchor 5 is installed on the tension-end anchor head 2, and a tension-end spring 7 is sleeved on the cable body 3 between the tension-end anchor plate 4 and the tension-end anchor 5; or the middle part of the cable body 3 is set as a disconnected structure, the disconnected part is sleeved by a connecting cylinder 10, and the two ends of the disconnected part are connected by a connecting spring 11.

[0026] A small stop plate 8 is provided on the side of the tensioning end anchor 5 near the tensioning end spring 7. One end of the tensioning end spring 7 is mounted on the small stop plate 8 or pressed against the surface of the small stop plate 8. A large stop plate 9 is provided on the side of the tensioning end anchor plate 4 near the tensioning end spring 7. The other end of the tensioning end spring 7 is mounted on the large stop plate 9 or pressed against the surface of the large stop plate 9.

[0027] The tensioning end spring 7 is either a conical spring 7-1 or a butterfly spring 7-2, with the small-diameter end of the conical spring 7-1 located outside the tensioning end anchor head 2.

[0028] The fixed end anchor head 1 is equipped with a fixed end anchor 6 or a fork-shaped connecting device.

[0029] The fork-ear connecting device includes a fork-ear 15, a fork-ear connector 16, and a bolt 17. The end of the fixed end anchor head 1 is fixedly provided with a fork-ear 15, and the fork-ear 15 is connected to the fork-ear connector 16 through the bolt 17.

[0030] The fixed end anchor head 1 and the periphery of the fixed end anchor 6 are provided with a fixed end protective cover 19.

[0031] The tensioning end anchor head 2 and the anchor are surrounded by a tensioning end protective cover 18.

[0032] One end of the connecting cylinder 10 is connected to one end of the connecting rod 14 via the connecting nut 12, and the other end of the connecting rod 14 is connected to the fixed end anchor head 1 via the adjusting cylinder 13, or the other end of the connecting rod 14 is connected to the cable body 3 fixed on the fixed end anchor head 1 via the adjusting cylinder 13.

[0033] The connecting spring 11 is sleeved on the outer circumference of the cable body 3 near the break point, and the connecting cylinder 10 is disposed on the outer circumference surface of the connecting spring 11.

[0034] Referring to the attached drawings in the specification, the base material of cable 3 in this application is made of NPR material. Utilizing the negative Poisson's ratio characteristic of NPR, it does not exhibit significant necking under tension, possessing high strength and toughness, good impact resistance, and excellent shear resistance. It can absorb and dissipate energy through its own deformation. The NPR cable of this application has excellent secondary stiffness and secondary energy absorption properties. When used in structures with high seismic intensity, it can achieve the effect of no damage in minor earthquakes, repairability in moderate earthquakes, and no collapse in major earthquakes. During daily use, it can dissipate energy through cable elongation and play a good energy absorption and buffering role, effectively preventing beam collapse and avoiding damage to beams and pier structures. The specific structure and principle are as follows: One end of the cable body 3 is a fixed end anchor head 1, and the other end is a tension end anchor head 2. A tension end anchor plate 4 is fixedly installed on one side of the tension end anchor head 2. In order to effectively solve the problems of low elongation and weak energy absorption capacity of ordinary cable anti-fall beams, this application also adopts a spring structure for energy absorption and buffering. The spring structure can be installed on the tension end anchor head or on the middle break of the cable body, mainly including the following implementation methods: Example 1: A conical spring 7-1 is installed on the tensioning end anchor head 2. The diameter of the spring coils of the conical spring 7-1 is gradually changing, so that all the spring coils can be compressed onto a single plane after being stressed. A small stop plate 8 is provided on the side of the tensioning end anchor 5 near the conical spring 7-1. One end of the conical spring 7-1 is installed on or pressed against the surface of the small stop plate 8, and the smaller diameter end of the conical spring 7-1 is located on one side of the small stop plate 8. A large stop plate 9 is provided on the side of the tensioning end anchor plate 4 near the conical spring 7-1, and the other end of the conical spring 7-1 is installed on or pressed against the surface of the large stop plate 9. When the cable is subjected to a certain tension or pressure, the conical spring 7-1 will deform. After installation as an anti-falling beam device, the conical spring 7-1 is in a pre-tightened state. At this time, the components on both sides can move without being rigidly constrained, and have a certain elastic range of motion. When the relative displacement between the two components is too large, and the travel of the conical spring 7-1 reaches its limit, the NPR cable of this application will begin to bear tension. As the tension continues to increase, the cable 3 can utilize the excellent performance of the NPR to elongate and dissipate energy, thus playing a buffering role. A fixed-end anchor 6 is installed on the fixed-end anchor head 1. The fixed-end anchor 6 can be a lock nut. A fixed-end protective cover 19 is provided at the end of the fixed-end anchor head 1 and around the fixed-end anchor 6.

[0035] Example 2: A butterfly spring 7-2 is installed on the tensioning end anchor head 2. One end of the diameter spring 7-2 rests on the surface of the tensioning end anchor 5, and the other end of the diameter spring 7-2 is installed on or rests on one side surface of the tensioning end anchor plate 4. The structure of one end of the fixed end anchor head 1 is the same as that of the fixed end anchor head in Example 1. A fixed end anchor 6 is installed on the fixed end anchor head 1. The fixed end anchor 6 can be a lock nut. A fixed end protective cover 19 is provided at the end of the fixed end anchor head 1 and around the fixed end anchor 6.

[0036] Example 3: A conical spring 7-1 is installed on the tensioning end anchor head 2, and its structure is the same as that in Example 3. Unlike Example 1, a fork-ear connecting device is installed on the fixed end anchor head 1. The fork-ear connecting device includes a fork ear 15, a fork ear connector 16, and a bolt 17. The fork ear 15 is fixedly provided at the end of the fixed end anchor head 1, and the fork ear 15 is connected to the fork ear connector 16 through the bolt 17. The fork ear connecting device can adapt to changes in a certain angle.

[0037] Example 4: A butterfly spring 7-2 is installed on the tensioning end anchor head 2, and its structure is the same as that in Example 2. The difference from Example 2 is that a fork-ear connecting device is installed on the fixed end anchor head 1, and the fork-ear connecting device has the same structure as the fork-ear connecting device used in Example 3.

[0038] Example 5: Instead of using a spring structure on the tensioning end anchor head, a spring structure is provided in the middle of the cable body 3. This can be improved on a conventional cable body, and fork-shaped connecting devices can be installed on the fixed end anchor head 1 and the tensioning end anchor head 2 respectively. The specific spring structure is as follows: A break structure is set in the middle of the cable body 3. A connecting spring 11 is sleeved on the outer circumference of the cable body 3 near the break point. One end of the connecting spring 11 is connected and fixed to the cable body 1 on one side of the break point, and the other end of the connecting spring 11 is connected and fixed to the cable body 1 on the other side of the break point. That is, the break point of the cable body is connected and fixed through the connecting spring 11. In addition, a connecting sleeve 10 is sleeved on the outer circumference of the connecting spring 11 for radial constraint. If the connecting sleeve 10 is fixed to the cable body 3 or the connecting spring 11, the connecting sleeve 10 can only be fixed to one of the cable bodies on both sides of the break point to prevent the break point of the cable body from being rigidly connected through the connecting sleeve 10. When the cable body is subjected to a certain tension during use, the connecting spring 11 will deform first. If the tension continues to increase, after the connecting spring 11 reaches its limit position, the NPR cable body will begin to bear the tension. The cable body 3 can then use the excellent performance of NPR to elongate and consume energy, playing a buffering role. When applied to anti-falling beam structures, it can achieve a very good anti-falling beam effect.

[0039] In addition, in order to adjust the length of the cable, this application uses an adjustable cylinder 13. One end of the connecting cylinder 10 is connected to one end of the connecting rod 14 through the connecting nut 12, and the other end of the connecting rod 14 is connected to the fixed end anchor head 1 through the adjustable cylinder 13. Alternatively, the other end of the connecting rod 14 is connected to the cable 3 fixed on the fixed end anchor head 1 through the adjustable cylinder 13. The length of the cable can be easily adjusted by rotating the adjustable cylinder 13.

[0040] The above description is a further detailed explanation of this application in conjunction with specific embodiments. It should not be assumed that the specific implementation of this application is limited to these descriptions. For those skilled in the art to which this application pertains, any simple modifications and substitutions made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. An NPR cable-stayed anti-falling beam device, comprising a fixed-end anchor head (1) and a tension-end anchor head (2), wherein a tension-end anchor plate (4) is fixedly provided on one side of the tension-end anchor head (2), and a cable body (3) is provided connecting the fixed-end anchor head (1) and the tension-end anchor head (2), characterized in that: The tensioning end anchor head (2) is equipped with a tensioning end anchor (5), and a tensioning end spring (7) is sleeved on the cable body (3) between the tensioning end anchor plate (4) and the tensioning end anchor (5). Alternatively, the middle part of the cable body (3) is set as a disconnected structure, and the disconnected part is sleeved by a connecting tube (10). The two ends of the disconnected part are connected by a connecting spring (11).

2. The NPR cable anti-fall beam device according to claim 1, characterized in that: The tension end anchor (5) is provided with a small stop plate (8) on the side near the tension end spring (7). One end of the tension end spring (7) is installed on the small stop plate (8) or pressed against the surface of the small stop plate (8). The tension end anchor plate (4) is provided with a large stop plate (9) on the side near the tension end spring (7). The other end of the tension end spring (7) is installed on the large stop plate (9) or pressed against the surface of the large stop plate (9).

3. The NPR cable anti-fall beam device according to claim 2, characterized in that: The tensioning end spring (7) is a conical spring (7-1) or a butterfly spring (7-2), with the small diameter end of the conical spring (7-1) located outside the tensioning end anchor head (2).

4. The NPR cable anti-fall beam device according to claim 1, characterized in that: The fixed end anchor head (1) is equipped with a fixed end anchor (6) or a fork-shaped connecting device.

5. The NPR cable anti-fall beam device according to claim 4, characterized in that: The fork ear connecting device includes a fork ear (15), a fork ear connector (16), and a bolt (17). The end of the fixed end anchor head (1) is fixedly provided with a fork ear (15), and the fork ear (15) is connected to the fork ear connector (16) through the bolt (17).

6. The NPR cable anti-fall beam device according to claim 1, characterized in that: The fixed end anchor head (1) and the periphery of the fixed end anchor (6) are provided with a fixed end protective cover (19).

7. The NPR cable anti-fall beam device according to claim 1, characterized in that: The tensioning end anchor head (2) and the anchor are surrounded by a tensioning end protective cover (18).

8. The NPR cable anti-fall beam device according to claim 1, characterized in that: One end of the connecting cylinder (10) is connected to one end of the connecting rod (14) via the connecting nut (12), and the other end of the connecting rod (14) is connected to the fixed end anchor head (1) via the adjusting cylinder (13), or the other end of the connecting rod (14) is connected to the cable body (3) fixed on the fixed end anchor head (1) via the adjusting cylinder (13).

9. The NPR cable anti-fall beam device according to claim 1, characterized in that: The connecting spring (11) is sleeved on the outer circumference of the cable (3) near the break point, and the connecting cylinder (10) is set on the outer circumference surface of the connecting spring (11).

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