A buffer energy dissipator for a flexible slope protection system

Abstract

The present invention discloses a buffer energy dissipator for a flexible slope protection system, which comprises a first steel wire rope, a second steel wire rope, a buffer device and a rod-type energy dissipator. The buffer device comprises at least two springs, a first base plate and a second base plate. Two ends of each spring are respectively fixedly connected to one side surface of the first base plate and the second base plate. An ear plate is arranged on the other side surface of the first base plate facing away from the spring, and the first steel wire rope is wound and fixed on the ear plate. One end of the rod-type energy dissipator is fixedly connected to one side surface of the second base plate facing away from the spring, and the other end of the rod-type energy dissipator is connected to the second steel wire rope. The present invention not only solves the "braking effect" problem that cannot be solved by the existing pressure reducing ring and rod-type energy dissipator, but also effectively solves the problem that the existing energy dissipator cannot limit the peak internal force of the steel wire rope and causes the steel wire rope to be damaged through the rod-type energy dissipator.

Description

Technical Field

[0001] The present invention relates to the field of road traffic safety protection facilities, and particularly to a buffer energy dissipator for a slope flexible protection system. Background Art

[0002] Since the 21st century, geological disasters such as rockfalls, landslides and debris flows have occurred frequently in China. These geological disasters have posed a serious threat to the construction of road traffic and transportation safety in China. To prevent the invasion of these geological disasters, at present, slope flexible protection systems are widely used in road traffic engineering. In recent years, the overall performance and protection energy level of slope flexible protection systems have been continuously climbing, and the key role in this is played by the energy dissipator.

[0003] At present, there are mainly three types of energy dissipators most widely used in slope flexible protection systems: decompression rings, rod-type energy dissipators, and spring-type energy dissipators. After the slope flexible protection system continuously suffers impacts, the energy dissipation capacity of the decompression ring will continuously decrease, and it cannot provide continuous energy dissipation capacity for the system. The decompression ring needs to be frequently replaced, which greatly reduces the economic benefits. At the same time, due to the unreasonable setting of the buffer mechanism of the decompression ring itself, the decompression ring often starts instantaneously and shows a "braking effect", resulting in abnormal damage to the system. The so-called "braking effect" is that when the slope flexible protection system is impacted by the intercepted object at the moment of impact, the intercepted object will generate a very large instantaneous impact force on the protection system, and the decompression ring often breaks due to being unable to withstand this huge instantaneous impact force; although the rod-type energy dissipator can solve the problem of frequent replacement of the decompression ring, it also cannot solve the problem of abnormal damage to the system caused by the "braking effect" of the decompression ring; although the spring-type energy dissipator can solve the problem of the "braking effect", because the spring-type energy dissipator cannot limit the peak value of the internal force of the steel wire rope of the slope flexible protection system, the steel wire rope is often damaged.

[0004] In summary, the slope flexible protection system needs a buffer energy dissipator that can solve the "braking effect", provide sufficient and continuous energy dissipation capacity for the system, and limit the peak value of the internal force of the steel wire rope. This has important engineering significance for protecting the highway traffic safety in areas where geological disasters occur frequently. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a buffer energy dissipator for a slope flexible protection system, which can not only solve the "braking effect" problem in the existing energy dissipators, but also effectively control the peak value of the internal force of the steel wire rope.

[0006] To solve the above technical problem, the present invention adopts the following technical solutions:

[0007] A buffer energy dissipator for a flexible slope protection system, characterized in that it comprises a first steel wire rope, a second steel wire rope, a buffer device and a rod-type energy dissipating device. The buffer device comprises at least two springs, a first base plate and a second base plate. Two ends of each spring are respectively fixedly connected to one side surface of the first base plate and the second base plate. An ear plate is arranged on the other side surface of the first base plate facing away from the spring, and the first steel wire rope is wound and fixed on the ear plate. The rod-type energy dissipating device comprises side plates, a cover plate, a rotating pin shaft and at least one steel rod. The side plates and the cover plate are welded and combined into a box body with openings at both ends. One end of the box body is fixedly connected to one side surface of the second base plate facing away from the spring. First round holes are spaced apart on the side plates, and the rotating pin shaft is inserted and fixed in the first round holes. The steel rod extends into the box body from an opening at one end of the box body away from the second base plate, bypasses the rotating pin shaft and then turns around and extends out of the box body. One end of the steel rod is connected to the second steel wire rope, and a limiting structure for preventing the steel rod from being pulled out of the box body as a whole is further arranged on the steel rod.

[0008] Further, two ends of each spring respectively penetrate through the first base plate and the second base plate. External threads are arranged at two ends of the spring. The first base plate and the second base plate are respectively pressed and fixed at two ends of the spring through the external threads in cooperation with a first bolt and a second bolt.

[0009] Further, the limiting structure comprises a first limiting ear plate and a second limiting ear plate. The first limiting ear plate and the second limiting ear plate are respectively perpendicularly installed on two end parts of the steel rod relative to the side plates. The distance between the first limiting ear plate and the side plate is greater than the distance between the second limiting ear plate and the side plate. The heights of the first limiting ear plate and the second limiting ear plate are greater than the distance between the two side plates. The second steel wire rope is wound and fixed on the second limiting ear plate.

[0010] Further, second round holes are also spaced apart beside the first round holes on the side plates. A limiting pin shaft for cooperating with the rotating pin shaft to limit the position of the steel rod is inserted and fixed in the second round holes. The cooperation of the limiting pin shaft and the rotating pin shaft can enable the steel rod to be stretched smoothly.

[0011] Furthermore, transverse through holes are arranged at two ends of the rotating pin shaft and the limiting pin shaft, and a plug pin for restricting axial displacement of the rotating pin shaft and the limiting pin shaft is inserted in the through holes.

[0012] Further, the diameter of the first round hole is 2-3 mm larger than the diameter of the rotating pin shaft, which can ensure that the transmission pin shaft can rotate more smoothly.

[0013] Furthermore, the diameter of the steel bar is 15 - 25 mm, and the number is 1 - 3.

[0014] Furthermore, the shortest distance between the limit pin shaft and the rotating pin shaft is 40 mm. The distance between the limit pin shaft and the rotating pin shaft is greater than the diameter of the steel bar, which can ensure that the steel bar can smoothly pass between the rotating pin shaft and the limit pin shaft, and at the same time can play a good limiting role on the steel bar.

[0015] Preferably, the number of the springs is 2 - 4.

[0016] Preferably, an anti-corrosion layer is coated on the surfaces of the first steel wire rope, the second steel wire rope, the ear plate, the buffer device, and the rod - type energy - dissipating device. The anti - corrosion layer can prevent the material from being corroded, maintain the quality of the components, and improve the overall service life of the device.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The buffer energy - dissipator for the slope flexible protection system of the present invention solves the "braking effect" problem that the existing pressure - reducing ring and rod - type energy - dissipating device cannot solve through the buffer device; when the intercepted object impacts the slope flexible protection system at an extremely high speed in an instant, the buffer device can resolve part of the impact force through the stretching of the spring. When the internal force of the spring is greater than the starting force of the rod - type energy - dissipating device, the rod - type energy - dissipating device will start to be stretched, effectively avoiding the abnormal damage of the entire system caused by the existing rod - type energy - dissipating device being unable to withstand the huge impact energy generated instantaneously; when the slope flexible protection system is subjected to a large impact force, the steel wire rope can control the peak value of the internal force of the steel wire rope by stretching the steel bar of the rod - type energy - dissipating device, effectively solving the problem that the existing energy - dissipator cannot limit the peak value of the internal force of the steel wire rope and causing the steel wire rope to be damaged.

[0019] (2) After each stretching of the rod - type energy - dissipating device in the present invention, the second steel wire rope can be switched and bound back and forth between the first limit ear plate and the second limit ear plate to realize the reuse of the device. And because the spring of the buffer device itself has a certain self - recovery ability, after cleaning up the geological disaster, it can return to its original state. This makes the overall buffer energy - dissipator of the present invention have a certain reusability, can provide sufficient and continuous energy - dissipating capacity for the protection system, and is simple to maintain and repair, without spending too much cost on maintenance. It solves the problems of troublesome maintenance and high maintenance cost of the energy - dissipator of the existing slope flexible protection system under multiple cumulative impacts. Compared with the existing energy - dissipator, it has better economic benefits and has a wide market application prospect and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Schematic diagram of the overall three-dimensional structure of the buffer energy dissipator according to an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the three-dimensional structure of the buffer device according to an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the three-dimensional structure of the rod-type energy dissipator according to an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the connection structure between the side plate and the cover plate according to an embodiment of the present invention.

[0024] In the figure: 1 - first steel wire rope, 2 - ear plate, 3 - buffer device, 4 - rod-type energy dissipator, 5 - second steel wire rope, 6 - first base plate, 7 - first bolt, 8 - spring, 9 - second base plate, 10 - second bolt, 11 - side plate, 12 - cover plate, 13 - limit pin shaft, 14 - rotation pin shaft, 15 - second round hole, 16 - first round hole, 17 - steel rod, 18 - first-position ear plate, 19 - second-position ear plate. Detailed implementation manners

[0025] The following will combine the drawings and embodiments to detail the technical solution of the present invention, so that those of ordinary skill in the art can better understand and implement the technical solution of the present invention.

[0026] The present invention provides a buffer energy dissipator for a slope flexible protection system as shown in Figures 1-4 which includes a first steel wire rope 1, a second steel wire rope 5, a buffer device 3 and a rod-type energy dissipator 4;

[0027] The buffer device 3 includes 4 springs 8, a first base plate 6 and a second base plate 9. The two ends of the spring 8 respectively penetrate through the first base plate 6 and the second base plate 9. External threads are provided at both ends of the spring 8 and are respectively matched with the first bolt 7 and the second bolt 10 to press and fix the first base plate 6 and the second base plate 9 on both ends of the spring 8; on the other side surface of the first base plate 6 facing away from the spring 8, an ear plate 2 is provided, and the first steel wire rope 1 is wound and fixed on the ear plate 2.

[0028] The rod-type energy dissipator 4 includes two side plates 11, two cover plates 12, a limit pin shaft 13, a rotation pin shaft 14 and 3 steel rods 17. The two side plates 11 and the two cover plates 12 are welded and combined into a box body with both ends open. One end of the box body is fixedly connected to the side surface of the second base plate 9 facing away from the spring 8;

[0029] A first circular hole 16 and a second circular hole 15 are provided on the side plate 11 at intervals. The rotation pin 14 passes through the first circular hole 16 on the two side plates 11, and the limit pin 13 passes through the second circular hole 15 on the two side plates 11. The diameter of the first circular hole 16 is 2-3 mm larger than the diameter of the rotation pin 14 to ensure that the rotation pin 14 can rotate in the first circular hole 16.

[0030] In this embodiment, in order to prevent the rotating pin shaft 14 and the limiting pin shaft 13 from falling out of the circular hole during use, through holes are provided at both ends of the rotating pin shaft 14 and the limiting pin shaft 13, and pins for limiting the axial displacement of the rotating pin shaft 14 and the limiting pin shaft 13 are inserted into the through holes;

[0031] In this embodiment, the diameter of each steel rod 17 is 15-25 mm, and the length of the steel rod 17 needs to be determined according to the actual situation, specifically, the steel rod 17 can stop the intercepted object before being pulled to the maximum limit; the steel rod 17 extends into the box body from the opening at one end of the box body away from the second base plate 9, and turns around and extends out of the box body after passing through the gap between the limit pin 13 and the rotating pin 14; in order to prevent the steel rod 17 from being stuck between the limit pin 13 and the rotating pin 14 and unable to move, the distance between the limit pin 13 and the rotating pin 14 is at least 40 mm;

[0032] In order to prevent the steel bar 17 from being pulled out as a whole during operation, a limiting structure is provided on the steel bar 17 in this embodiment, and the limiting structure includes a first limiting ear plate 18 and a second limiting ear plate 19, which are respectively installed vertically on both ends of the steel bar 17 relative to the side plate 11, and the height of the first limiting ear plate 18 and the second limiting ear plate 19 needs to be greater than the distance between the two side plates 11, so that the first limiting ear plate 18 and the second limiting ear plate 19 can be supported by the two side plates 11 when being stretched to the opening end of the box body, so that the steel bar 17 will not be pulled out as a whole;

[0033] like Figure 3 As shown, in the initial state, the shortest distance from the first limiting ear plate 18 to the side plate 11 is 1-2m larger than the shortest distance from the second limiting ear plate 19 to the side plate 11, so that the stretching distance of the steel rod 17 can reach at least 1-2m, and the second steel wire rope 5 is wound and fixed on the second limiting ear plate 19; when the second steel wire rope 5 pulls the steel rod 17, this end of the second limiting ear plate 19 will be stretched, and correspondingly, one end of the first limiting ear plate 18 will be pulled and contracted toward the direction of the box body. When the first limiting ear plate 18 reaches the opening of the box body, since the height of the first limiting ear plate 18 is greater than the distance between the two side plates 11, the first limiting ear plate 18 will be supported by the two side plates 11, thereby limiting the movement of the steel rod 17 and preventing the steel rod 17 from being completely pulled out.

[0034] Preferably, an anti-corrosion layer is coated on the surface of the first steel wire rope 1, the second steel wire rope 5, the ear plate 2, the buffer device 3, and the rod-type energy dissipation device 4. The anti-corrosion layer can prevent the material from being corroded, maintain the quality of the components, and increase the overall service life of the device.

[0035] The working principle of the buffer energy absorber of the present invention is as follows: when the impact force received by the flexible slope protection system is small, the spring 8 of the buffer device 3 will be stretched steadily to absorb the impact energy received by the protection system, and when the internal force of the spring 8 is smaller than the starting force of the rod-type energy absorber 4, the rod-type energy absorber 4 will not start working. After the impact, the buffer device 3 can be restored to its original state by clearing the geological disasters; when the flexible slope protection system is subjected to a large impact force, first the spring 8 of the buffer device 3 will be stretched steadily to absorb the impact energy received by the protection system. When the internal force of the spring 8 is greater than the starting force of the rod-type energy absorber 4, the steel rod 17 of the rod-type energy absorber 4 begins to be stretched, so that the internal force of the protection system no longer increases, and the peak value of the internal force is effectively controlled.

[0036] The present invention solves the "brake effect" problem that cannot be solved by the existing decompression ring and rod-type energy dissipation device 4 through the buffer device 3; when the intercepted object hits the upper slope flexible protection system at a very fast speed, the buffer device 3 can dissipate part of the impact force by stretching the spring 8, and the rod-type energy dissipation device 4 will start to be stretched when the internal force of the spring 8 is greater than the starting force of the rod-type energy dissipation device 4 in the present invention, which effectively avoids abnormal damage to the entire system caused by the existing rod-type energy dissipation device 4 due to its inability to withstand the huge impact energy generated instantly.

[0037] The present invention can control the starting force of the rod-type energy dissipation device 4 by controlling the number of steel rods 17 in the rod-type energy dissipation device 4, and control the starting force of the rod-type energy dissipation device 4 to be within the range of the maximum internal force that the spring 8 in the buffer device 3 can withstand as a whole, so as to prevent the spring 8 from losing its function due to excessive internal force.

[0038] In this embodiment, after the steel rod 16 in the rod-type energy dissipation device 4 is stretched by the second steel wire rope 5, the distance from the first limit ear plate 18 to the side plate 11 will become longer than the distance from the second limit ear plate 19 to the side plate 11. At this time, the second steel wire rope 5 is removed from the first ear plate 2, and then the second steel wire rope 5 is tied to the second ear plate 2, so that the rod-type energy dissipation device 4 can be put into use again; and because the spring 8 in the buffer device 3 itself also has a certain self-recovery ability, the buffer energy absorber of the present invention is reusable, which solves the problem of troublesome maintenance and high maintenance cost of the existing energy absorber after multiple accumulated impacts.

[0039] The above embodiments are only preferred embodiments of the present invention, but they do not limit the invention. Any variations and improvements made based on the concept of the present invention shall fall within the protection scope of the present invention, and the specific protection scope shall be subject to the claims.

Claims

1. A buffer energy dissipator for a slope flexible protection system, characterized in that: It includes a first steel wire rope, a second steel wire rope, a buffer device and a rod-type energy dissipation device. The buffer device includes at least two springs, a first base plate and a second base plate. Two ends of each spring are fixedly connected to one side surface of the first base plate and the second base plate respectively. An ear plate is arranged on the other side surface of the first base plate facing away from the spring, and the first steel wire rope is wound and fixed on the ear plate; the rod-type energy dissipation device includes side plates, a cover plate, a rotating pin shaft and at least one steel rod. The side plates and the cover plate are welded and combined into a box body with openings at both ends. One end of the box body is fixedly connected to one side surface of the second base plate facing away from the spring; first round holes are spacedly arranged on the side plates, the rotating pin shaft is inserted and fixed in the first round holes, the steel rod extends into the box body from the opening at one end of the box body away from the second base plate, bypasses the rotating pin shaft and then turns around and extends out of the box body. One end of the steel rod is connected to the second steel wire rope, and a limiting structure for preventing the steel rod from being completely pulled out of the box body is also arranged on the steel rod.

2. The buffer energy dissipator for a slope flexible protection system according to claim 1, characterized in that: Two ends of each spring penetrate through the first base plate and the second base plate respectively. External threads are arranged on two ends of each spring. The first base plate and the second base plate are pressed and fixed on two ends of the spring respectively through the external threads cooperating with a first bolt and a second bolt.

3. The buffer energy dissipator for a slope flexible protection system according to claim 1, characterized in that: The limiting structure includes a first limiting ear plate and a second limiting ear plate. The first limiting ear plate and the second limiting ear plate are respectively installed perpendicularly to the side plates at two ends of the steel rod. The distance between the first limiting ear plate and the side plate is greater than the distance between the second limiting ear plate and the side plate. The heights of the first limiting ear plate and the second limiting ear plate are greater than the distance between the two side plates; the second steel wire rope is wound and fixed on the second limiting ear plate.

4. The buffer energy dissipator for a slope flexible protection system according to claim 1, characterized in that: Second round holes are also spacedly arranged beside the first round holes on the side plates, and a limiting pin shaft for cooperating with the rotating pin shaft to limit the position of the steel rod is inserted and fixed in the second round holes.

5. The buffer energy dissipator for a slope flexible protection system according to claim 4, characterized in that: Transverse through holes are arranged at two ends of the rotating pin shaft and the limiting pin shaft, and a pin for limiting the axial displacement of the rotating pin shaft and the limiting pin shaft is inserted in the through holes.

6. The buffer energy dissipator for a slope flexible protection system according to claim 5, characterized in that: The diameter of the first round hole is 2-3 mm larger than the diameter of the rotating pin shaft.

7. The buffer energy dissipator for a slope flexible protection system according to claim 6, characterized in that: The diameter of the steel rod is 15-25 mm, and the number is 1-3.

8. The buffer energy dissipator for a slope flexible protection system according to claim 7, characterized in that: The shortest distance between the limiting pin shaft and the rotating pin shaft is 40 mm.

9. The buffer energy dissipator for a slope flexible protection system according to claim 1, characterized in that: The number of the springs is 2-4.

10. The buffer energy dissipator for a slope flexible protection system according to any one of claims 1-9, characterized in that: Anticorrosion layers are coated on the surfaces of the first steel wire rope, the second steel wire rope, the ear plate, the buffer device and the rod-type energy dissipation device.

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