Energy dissipation buffer device for side slope flexible protective net

Abstract

The invention belongs to the technical field of side slope protection equipment, and particularly discloses an energy dissipation buffer device for a side slope flexible protection net, the energy dissipation buffer device comprises a connecting rod, a connecting cylinder, an elastic piece and a rope, the connecting rod comprises a traction section and an extending section, the extending section is of a screw rod structure, the connecting cylinder comprises a cylinder body and a disc body, a first through hole is formed in the closed end of the cylinder body, and the elastic piece is arranged in the first through hole; a tooth block matched with the spiral groove is arranged on the first through hole; the cylinder body is arranged on the extending-in section in a sleeving manner, and the extending-in section can penetrate out of the first through hole; when the stretching-in section moves along with the traction section and penetrates out of the first through hole, the tooth block slides in the spiral groove, and linear sliding motion of the stretching-in section is converted into rotation of the barrel; the elastic piece is located in the cylinder, one end of the elastic piece is attached to the stretching-in section, the other end of the elastic piece is attached to the cylinder, and one ends of the ropes are fixed to the traction section. The four core pain points of'one-time consumption, low energy dissipation efficiency, high maintenance risk and concentrated local stress' of a traditional slope buffering technology are effectively solved.

Description

Technical Field

[0001] This invention belongs to the technical field of slope protection equipment, and specifically relates to an energy dissipation and buffer device for flexible slope protection nets. Background Technology

[0002] Flexible slope protection nets are key facilities for slope disaster protection. Their core function is to intercept falling rocks, debris flows, etc. They achieve protection through the buffering and blocking of the overall structure. Flexible slope protection nets are mainly divided into active protection nets and passive protection nets.

[0003] Passive protective nets consist of a main protective system and an auxiliary fixing system, such as... Figure 6 As shown, the passive protection net mainly includes the net body, supporting structure, anchoring system, and buffer components. Anchor bolts / cables are drilled into stable rock strata, and the base is integrated with the ground through concrete pouring. One end of the anchor rope is connected to the base, and the other end is fixed to the top of the steel column. The bottom of the steel column is connected to the base via hinges. Horizontal beams and longitudinal beams are horizontally fixed between the steel columns, forming a frame. A wire rope net is laid on the outside of the supporting frame and tied to the horizontal and longitudinal beams with stitching ropes passing through the mesh. A wire mesh covers the inside of the main net, increasing the interception density. Pressure-reducing rings are connected in series at the connection between the anchor rope and the steel column; they stretch and deform to dissipate energy during impact. When a falling rock impacts the wire rope net, the net initially absorbs some energy through elastic stretching, while simultaneously transmitting the impact force evenly across the entire net surface. During this process, the tension of the wire rope net is transmitted to the frame through the stitching ropes, and then from the steel column to the anchor rope. At this point, the pressure-reducing ring immediately stretches and deforms (or breaks), dissipating most of the impact energy. Then, the anchor rope transfers the tension to the anchoring system, which in turn transmits the remaining energy to the stable rock layer through the tension of the anchor rod / anchor cable, forming a complete buffer chain of "impact-tension-decompression-conduction".

[0004] In the aforementioned buffer chain, the anchor rope is a key force-transmitting component connecting the top of the steel column to the anchoring system in the passive protection net. The pressure-absorbing ring is a specially designed energy-absorbing element within the anchor rope. Its core principle is to absorb energy through its own plastic deformation (or even breakage). However, the pressure-absorbing ring lacks restoring capability and is a disposable or limited-use component. Once it experiences a significant impact, its structural integrity will be compromised. Even after clearing the fallen rocks from the wire rope net, the pressure-absorbing ring must be removed and replaced; otherwise, it will lose its buffering function, greatly increasing subsequent maintenance work. Furthermore, removing and replacing the pressure-absorbing ring requires disassembling the anchor rope and steel column connection points, which involves high-altitude work on the slope, posing certain safety risks and requiring highly skilled personnel. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide an energy dissipation and buffer device for flexible slope protection nets, which effectively solves the four core pain points of traditional slope buffer technology: "one-time consumption, low energy dissipation efficiency, high maintenance risk, and localized stress concentration".

[0006] The technical solution of the present invention is: an energy dissipation and buffer device for flexible slope protection netting, comprising a connecting rod, a connecting cylinder, an elastic element, and a rope.

[0007] The connecting rod includes a pulling section and an extension section. One end of the pulling section is fixed to the anchor rope; the extension section is a screw structure with a spiral groove on the side wall, and one end of the extension section is fixed to the pulling section.

[0008] The connecting cylinder includes a cylinder body and a disc body. One end of the cylinder body is a closed end, and the other end is rotatably connected to the anchor rod / anchor cable. A first through hole is provided on the closed end of the cylinder body, and the first through hole has a toothed block that matches the spiral groove. The cylinder body is sleeved on the extension section, and the extension section can pass through the first through hole. When the anchor rope pulls the pulling section, the extension section moves with the pulling section and passes through the first through hole. At this time, the toothed block slides in the spiral groove, converting the linear motion of the sliding extension section into the rotation of the cylinder body. The disc body is fixed on the outer wall of the cylinder body, and the disc body has multiple second through holes.

[0009] The elastic element is located inside the cylinder, with one end fitting against the extension section and the other end fitting against the cylinder. When the extension section extends out of the cylinder through the first perforation, the elastic element is compressed and deformed to dissipate energy.

[0010] There are multiple ropes, one end of which is fixed to the pulling section, and the other end passes through the second hole one by one. When the anchor rope pulls the pulling section, one end of the rope moves with the pulling section. At this time, the disc rotates with the cylinder. The multiple ropes rotate with the disc and are wrapped around the pulling section to form rope strands. The multiple ropes in the rope strands and the ropes and the pulling section squeeze each other to dissipate energy.

[0011] Furthermore, the ratio of the pitch of the spiral groove to the diameter of the connecting rod is (1.2~2):1.

[0012] Furthermore, the rope includes a rope body and an elastic tube wrapped around the outer wall of the rope body. The elastic tube is made of a flexible material and deforms when the rope is squeezed between itself and between the rope and the pulling section to dissipate energy.

[0013] Furthermore, the ratio of the wall thickness of the elastic tube to the diameter of the rope is 1:(1.5~3).

[0014] Furthermore, the pulling section is equipped with a fixing plate, and multiple fixing holes are provided on the fixing plate along the circumferential direction of the connecting rod axis, with multiple ropes fixed one-to-one in the fixing holes.

[0015] Furthermore, the elastic element is a spring, which is sleeved on the extension section. A tray is provided at the end of the extension section away from the pulling section. One end of the elastic element is in contact with the tray, and the other end is in contact with the inner side of the cylinder at the closed end.

[0016] Furthermore, the connecting cylinder also includes a turntable, which has an inner ring hole corresponding to the first perforation position. The outer ring edge of the turntable is rotatably disposed on the inner side wall of the cylinder, and the other end of the elastic element is in contact with the turntable.

[0017] Furthermore, the outer ring edge of the turntable is provided with multiple sets of first ring grooves, and the inner side wall of the cylinder is provided with multiple sets of second ring grooves that correspond one-to-one with the positions of the first ring grooves. The first ring grooves and the second ring grooves constitute a rolling groove, and multiple balls are arranged in the rolling groove.

[0018] Furthermore, the connecting cylinder also includes a wire harness, which is a disc structure with an inner annular hole. The diameter of the inner annular hole is larger than the diameter of the cylinder. The wire harness is sleeved on the cylinder and can slide along the length of the cylinder. Multiple third through holes are provided on the wire harness along the circumferential direction of the axis, and the ends of multiple ropes pass through the third through holes one by one.

[0019] Furthermore, a limiting groove is provided on the outer side wall of the cylinder along the length direction, and a limiting block is provided on the inner ring of the wire harness, the limiting block being engaged in the groove.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention effectively solves the four core pain points of traditional slope buffer technology: "one-time consumption, low energy dissipation efficiency, high maintenance risk, and localized stress concentration". It ultimately achieves the technical effects of "higher protection level, lower maintenance cost, better structural stability, and stronger environmental adaptability", providing a more reliable and economical buffer solution for flexible slope protection nets, specifically manifested in the following four points.

[0021] 1. This invention achieves dual energy dissipation through the elastic element and the rope: the elastic element is located inside the cylinder and undergoes compression deformation under the extension section to achieve primary energy dissipation, quickly absorbing the initial impact; the rope rotates with the disc of the connecting cylinder and winds around the traction section, completing secondary energy dissipation through compression between ropes and between ropes and the traction section. Compared with the traditional pressure-reducing ring's single plastic deformation energy dissipation, this invention covers impact scenarios of various sizes, significantly improves energy absorption capacity, and can adapt to impacts from larger mass falling rocks.

[0022] 2. This invention is reusable, reducing maintenance costs. Traditional pressure-reducing rings require replacement after structural damage due to impact, and necessitate high-altitude disassembly of anchor ropes and steel column nodes, posing a high risk. In this solution, the elastic element can elastically reset after compression, and the rope can be released and loosened with tension after being wrapped. The meshing structure of the connecting rod and connecting cylinder remains undamaged, eliminating the need for frequent replacements, reducing maintenance frequency and the risks of high-altitude operations, and lowering long-term costs.

[0023] 3. During the energy dissipation process, the overall motion transformation of this invention achieves uniform force distribution. The spiral groove of the extension section meshes with the toothed blocks of the cylinder, converting the linear motion of the extension section into the circumferential rotation of the cylinder, causing the rope to wind evenly and avoiding the problem of concentrated force in traditional technologies. At the same time, the double energy dissipation disperses the impact load, preventing local overload tearing of the protective net and extending the overall lifespan of the device and the protective net.

[0024] 4. The device of this invention has strong structural adaptability and can be directly connected with existing slope protection anchors / anchors and anchor ropes without modifying the original support frame. It has a compact structure, is suitable for complex installation scenarios such as steep slopes, and improves the applicability of the project. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the energy dissipation buffer device as an energy absorption element of the anchor rope in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the external structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention; Figure 4 This is a structural comparison diagram of the rope winding and pulling section before and after in Embodiment 1 of the present invention; Figure 5 This is a cross-sectional view of the rope in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of a structure in the prior art that uses a pressure-reducing ring as an energy-absorbing element for anchor ropes; Figure 7 This is a schematic diagram of the structure of the energy dissipation buffer device as an energy absorption element of the anchor rope in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the internal structure of Embodiment 3 of the present invention; Figure 11 This is a bottom view of the connecting cylinder in Embodiment 3 of the present invention.

[0026] Among them, 1-connecting rod, 11-pull section, 110-fixing plate, 12-extending section, 120-tray, 2-connecting cylinder, 20-turntable, 21-cylinder body, 210-first perforation, 22-plate body, 220-second perforation, 23-wire harness, 230-third perforation, 2300-limiting block, 3-elastic element, 4-rope, 40-elastic tube. Detailed Implementation

[0027] The following is combined Figures 1 to 11 The specific embodiments of the present invention will be described in detail below. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] Example 1 like Figure 1 , Figure 2 , Figure 3 The energy dissipation and buffer device shown is used for flexible slope protection netting, including a connecting rod 1, a connecting cylinder 2, an elastic element 3, and a rope 4.

[0030] The connecting rod 1 includes a pulling section 11 and an extension section 12. One end of the pulling section 11 is fixed to the anchor rope. The extension section 12 is a screw structure with a spiral groove on the side wall. One end of the extension section 12 is fixed to the pulling section 11.

[0031] The connecting cylinder 2 includes a cylinder body 21 and a disc body 22. One end of the cylinder body 21 is a closed end, and the other end is rotatably connected to the anchor rod / anchor cable. In this embodiment, the other end of the cylinder body 21 is rotatably connected to the anchor rod / anchor cable through a universal joint. A first through hole 210 is provided on the closed end of the cylinder body 21, and the first through hole 210 has a toothed block that matches the spiral groove. The cylinder body 21 is sleeved on the extension section 12, and the extension section 12 can pass through the first through hole 210. When the anchor rope pulls the pulling section 11, the extension section 12 moves with the pulling section 11 and passes through the first through hole 210. At this time, the toothed block slides in the spiral groove, converting the linear motion of the sliding extension section 12 into the rotation of the cylinder body 21. The disc body 22 is fixed on the outer wall of the cylinder body 21, and the disc body 22 is provided with multiple second through holes 220.

[0032] The elastic element 3 is located inside the cylinder 21, with one end attached to the extension section 12 and the other end attached to the cylinder 21. When the extension section 12 extends out of the cylinder 21 through the first perforation 210, the elastic element 3 is compressed and deformed to dissipate energy.

[0033] There are multiple ropes 4, one end of which is fixed to the pulling section 11, and the other end passes through the second through hole 220. When the anchor rope pulls the pulling section 11, one end of the rope 4 moves with the pulling section 11. At this time, the disc 22 rotates with the cylinder 21. Figure 4 As shown, multiple ropes 4 rotate with the disc 22 and are wound around the traction section 11 to form rope strands. The multiple ropes 4 in the rope strands and the ropes 4 and the traction section 11 squeeze each other to dissipate energy.

[0034] When falling rocks impact the protective net → the anchor rope pulls the pulling section 11 of the connecting rod 1 → the extension section 12 moves linearly along the axis → the toothed blocks of the cylinder 21 mesh with the spiral groove of the extension section 12 → the cylinder 21 drives the disc 22 to rotate synchronously → the elastic element 3 is squeezed and deformed to dissipate energy → the rope 4 rotates with the disc 22 and is evenly wound around the pulling section 11, forming rope strands and squeezing each other to dissipate energy → double energy dissipation cancels out the impact kinetic energy.

[0035] In this embodiment, a dual energy dissipation system is formed by the deformation energy dissipation of the elastic element 3 and the compression energy dissipation of the rope 4. The elastic element 3 absorbs the initial impact energy quickly through axial compression deformation, thus slowing down the movement speed of the extension section 12. Meanwhile, the rope 4 rotates with the disc 22 and winds around the traction section 11. The resulting rope strands further disperse and absorb the remaining impact energy through the compression friction between the rope and the rope and between the rope and the traction section 11. Moreover, the winding process can be adapted to different impact intensities through the deformation of the rope 4.

[0036] The dual energy dissipation path covers all scenarios from "small impact to large impact," significantly improving energy absorption compared to traditional single energy dissipation methods. This prevents the protective net from tearing due to localized energy concentration, effectively enhancing energy dissipation efficiency. Furthermore, it can adapt to impacts from larger mass rocks, extending the overall service life of the protective net and overcoming the limitations of traditional pressure-reducing rings that are "suitable for small energy impacts but fail for large energy impacts."

[0037] Compared to Figure 6 Compared with the existing energy dissipation technology using pressure-reducing rings, in this embodiment, the elastic element 3 can elastically reset after being squeezed without plastic damage. The rope strand formed by the winding of the rope 4 can be loosened by rotating in the opposite direction with the cylinder 21 after the impact is eliminated and the tension of the anchor rope is released. The rope 4 itself is not irreversibly damaged. The spiral groove of the extension section 12 and the toothed block of the cylinder 21 have a meshing structure, and there is no structural damage after impact, so the motion can be repeatedly transmitted.

[0038] Moreover, traditional buffer devices are mostly "linearly directly stressed," such as the pressure-reducing ring directly bearing the axial tension of the anchor rope, which easily leads to local stress concentration. This not only makes the device itself prone to damage but also transmits the concentrated force to the protective net, causing local tearing of the net. The energy dissipation buffer device proposed in this embodiment achieves force dispersion through the transformation from "linear motion of the extension section 12 to circumferential motion of the cylinder 21": the axial linear motion of the extension section 12 is transformed into the circumferential rotation of the cylinder 21 through the meshing of the toothed blocks of the cylinder 21 with the spiral groove of the extension section 12, dispersing the concentrated axial tension into "axial compressive force + circumferential torque," avoiding stress overload in one direction; the disc 22 rotates synchronously with the cylinder 21, driving the rope 4 to be evenly wound around the traction section 11, ensuring that the rope 4 is evenly stressed during the energy dissipation process, further dispersing the impact load.

[0039] In addition, the connecting rod 1, connecting cylinder 2, elastic element 3, and rope 4 are integrated around the "axial center", which is compact, small in size and light in weight, and suitable for the installation needs of steep slopes and narrow spaces. It can directly replace the traditional pressure relief ring and seamlessly connect with the existing "anchor rope-anchor rod / anchor cable" system of the flexible slope protection net without the need to modify the original protection frame.

[0040] Preferably, the ratio of the pitch of the spiral groove to the diameter of the connecting rod 1 is (1.2~2):1.

[0041] The limitation on the ratio of the spiral groove pitch to the diameter of the connecting rod 1 is based on the core structure of "the spiral groove of the extension section 12 meshing with the tooth block of the cylinder 21 to achieve motion conversion" in this embodiment. It is optimized for four key dimensions: "motion conversion stability, force safety, energy dissipation coordination, and component durability".

[0042] If the spiral groove density is too high, the number of spiral groove turns per unit length is too large, and the meshing frequency between the toothed block and the spiral groove is too high, it is easy to cause the cylinder 21 to "jam" or "speed up and slow down" during rotation. This will cause "local accumulation" when the disc 22 drives the rope 4 to wind, resulting in uneven energy dissipation between "ropes 4" and "rope 4 and the pulling section 11", leading to local stress concentration and even rope 4 breakage. If the spiral groove density is too low, the number of spiral groove turns per unit length is too small, and the meshing points between the toothed block and the spiral groove are too few, it is easy to cause the cylinder 21 to rotate "discontinuously", that is, the meshing gap is too large, and the linear motion cannot be continuously converted into circular motion. The disc 22 rotates intermittently, and the rope 4 is prone to "loosening" or "misalignment" during winding, making it impossible to form uniform rope strands, and the secondary energy dissipation effect is greatly weakened. The ratio of (1.2~2):1 ensures that the spiral groove density is moderate, the toothed block and the spiral groove always maintain 3 to 5 stable contact points, and the cylinder 21 can rotate synchronously and uniformly with the linear movement of the extension section 12, ultimately realizing that the rope 4 is uniformly wound along the axial direction of the pulling section 11, providing a stable structural foundation for the secondary energy dissipation.

[0043] Furthermore, the diameter of connecting rod 1 directly determines its axial load-bearing capacity. That is, the larger the diameter, the stronger the tensile and bending resistance. The pitch of the spiral groove determines the "force transmission efficiency" when the toothed block meshes with the spiral groove. The magnitude of the force at the meshing point is directly related to the matching degree of the pitch and the diameter.

[0044] If the ratio is less than 1.2, it indicates that the pitch is too small: there are too many meshing points per unit length. Although the force on each individual meshing point is small, the overall meshing resistance is too large, similar to the hindrance effect of "multiple teeth engaging simultaneously". When the anchor rope transmits a large impact force, the linear movement of the extension section 12 is hindered, which can easily lead to "bending stress concentration" at the connection between the tension section 11 and the extension section 12 of the connecting rod 1. Long-term use may cause the connecting rod 1 to break. If the ratio is greater than 2, it indicates that the pitch is too large: there are too few meshing points per unit length. Each meshing point has to bear a larger impact force. For example, the force that was originally shared by 3 points is only borne by 1 point, and the force is amplified by 3 times. The tooth blocks of the cylinder 21 or the spiral groove of the extension section 12 are prone to "tooth surface wear" or "groove wall deformation" due to excessive local force, which will damage the meshing structure and cause motion conversion failure. The ratio (1.2~2):1 can achieve a balance between the number of engagement points and the force on a single point: it avoids the overall resistance from exceeding the limit due to too many engagement points, and prevents local overload due to too few engagement points, ensuring that the connecting rod 1 and the connecting cylinder 2 maintain structural integrity under long-term impact, which meets the design goal of "reusability" of this invention.

[0045] Moreover, the core advantage of the energy dissipation buffer device in this embodiment is the synergistic effect of "elastic element 3 primary energy dissipation + rope 4 secondary energy dissipation". The rotation speed of the cylinder 21 directly determines the "response speed" and "energy absorption rhythm" of the secondary energy dissipation. The ratio of the spiral groove pitch to the rod diameter indirectly regulates the synergy of the two-stage energy dissipation by affecting the rotation speed of the cylinder 21.

[0046] If the ratio is less than 1.2, the pitch is too small, resulting in a slow cylinder rotation speed. The winding speed of rope 4 lags behind the compression speed of elastic element 3. Elastic element 3 has to bear most of the initial impact energy alone, which is prone to exceeding the elastic limit due to "over-compression". This can easily lead to permanent deformation of the spring, causing the first-stage energy dissipation to fail prematurely. Subsequent impacts are directly transmitted to the protective net, causing the protective net to tear. If the ratio is greater than 2, the pitch is too large, resulting in a fast cylinder rotation speed. The winding speed of rope 4 far exceeds the compression speed of elastic element 3. The rope strands form quickly and are over-compressed, which may momentarily exceed the load-bearing limit of rope 4. The second-stage energy dissipation fails prematurely, and the remaining impact energy cannot be completely absorbed by elastic element 3 alone, resulting in a decrease in overall buffering capacity. A ratio of (1.2~2):1 can keep the cylinder 21 in "medium-speed stable rotation". The winding speed of rope 4 matches the compression speed of elastic element 3. After elastic element 3 absorbs the initial impact, rope 4 synchronously forms uniform rope strands and is gradually compressed. The two stages of energy dissipation are "seamlessly connected", avoiding overload of a single energy dissipation component and maximizing the total energy dissipation efficiency.

[0047] Preferred, such as Figure 5 As shown, the rope 4 includes a rope body and an elastic tube 40 wrapped around the outer wall of the rope body. The elastic tube 40 is made of a flexible material. The elastic tube 40 deforms when the ropes 4 are squeezed together and when the ropes 4 are squeezed together with the tension section 11 to dissipate energy. In this embodiment, the rope body is made of steel wire rope and the elastic tube 40 is made of rubber.

[0048] The core function of rope 4 is to rotate with disc 22 and wind around the tension section 11, dissipating energy through compression between rope strands and between the rope and the tension section 11. If it were only the rope itself, its energy dissipation would mainly rely on the rope's own slight deformation combined with friction, resulting in a low energy absorption limit and the potential for insufficient energy dissipation leading to the transfer of impact loads to the protective net or anchoring system. The elastic tube 40, made of flexible material, can undergo significant deformation when the rope 4 is compressed. Compared to a simple rope, the deformation of the elastic tube 40 can absorb a large amount of additional impact energy, effectively adding an "elastic tube deformation energy dissipation" path to the existing "rope compression and friction energy dissipation," directly enhancing the efficiency and capacity of secondary energy dissipation.

[0049] Furthermore, when the rope strands are wound together, the elastic tube 40 can adapt its deformation according to the position of the adjacent ropes, filling the gaps between the ropes and making the rope strands fit together tightly as a whole. During the compression process, the deformation of the elastic tube 40 can disperse the local concentrated stress to a larger area, ensuring that each rope 4 and the pulling section 11 are subjected to uniform force, and avoiding damage to the component structure due to excessive local stress.

[0050] Moreover, during the process of the rope rotating, winding, and being squeezed by the disc 22, direct hard contact and friction will occur between the ropes and between the rope and the pulling section 11. If used for a long time, this will easily lead to wear on the surface of the rope and fiber breakage. However, by installing an elastic tube 40 on the outside of the rope, during compression, the elastic tube 40 directly contacts the elastic tubes 40 of other ropes or the pulling section 11, avoiding direct friction between the rope and hard objects. The flexible nature of the elastic tube 40 can disperse the compressive stress and reduce the damage caused by localized stress concentration on the rope.

[0051] Preferably, the ratio of the wall thickness of the elastic tube 40 to the diameter of the rope is 1:(1.5~3).

[0052] The core function of the elastic tube 40 is to "absorb energy through compression deformation." The ratio of the tube wall thickness to the rope diameter directly determines its deformation capacity and damage resistance limit. If the ratio deviates from 1:(1.5~3), it will directly weaken the secondary energy dissipation effect. If the ratio is greater than 1:1.5, that is, the tube wall is too thick and the rope is too thin, the flexibility of the elastic tube 40 decreases and its rigidity increases. It is difficult to deform effectively during compression and cannot fully absorb impact energy. The secondary energy dissipation becomes "formal," and most of the impact load still needs to be borne by the elastic element 3 or the rope, which can easily cause the elastic element 3 to overload and deform and the rope to break. If the ratio is less than 1:3, that is, the tube wall is too thin and the rope is too thick, although the elastic tube 40 is flexible and easy to deform, the tube wall strength is insufficient. It is easy to "crack and perforate" during compression or friction. Not only will it fail to dissipate energy continuously, but it will also lose its protective function for the rope. The rope will be directly exposed to hard contact, accelerating wear. The ratio range is fixed at 1: (1.5~3) so that the elastic tube 40 can generate sufficient deformation during extrusion and resist damage caused by repeated extrusion and friction, thus avoiding energy dissipation failure caused by the tube wall being "too rigid and not enough to dissipate energy" or "too thin and easily damaged".

[0053] Preferably, the pulling section 11 is provided with a fixing plate 110, and the fixing plate 110 is provided with multiple fixing holes along the circumferential direction of the axis of the connecting rod 1, and multiple ropes are fixed to the fixing holes one by one.

[0054] The core function of rope 4 is to "wind around the pulling section 11 as the disc 22 rotates, forming rope strands and dissipating energy through compression"—this process requires that "each rope's initial fixed position is symmetrical and its tension is consistent." If rope 4 is directly tied or randomly fixed to the pulling section 11, the problem of "fixed position misalignment" is likely to occur. Therefore, by setting multiple fixing holes circumferentially along the axis of the connecting rod 1 through the fixing disc 110, the fixed ends of each rope 4 can be evenly distributed along the circumference of the pulling section 11, ensuring that the initial tension of each rope is consistent and its corresponding position with the second through hole 220 of the disc 22 is accurate. Furthermore, when the disc 22 rotates with the cylinder 21, all ropes are synchronously and evenly wound around the pulling section 11, forming tight and symmetrically stressed rope strands, providing a stable structural foundation for the "uniform compression" of the secondary energy dissipation.

[0055] In addition, the fixing hole structure of the fixing disc 110 provides a "structured and standardized" fixing point for the rope 4. The rope can be firmly connected to the fixing hole by knotting, snapping, etc., to avoid loosening during impact. The fixing hole forms a "constraint protection" for the rope, reducing local stress concentration at the fixed end of the rope, such as avoiding rope compression damage caused by binding, so that the rope 4 can withstand multiple winding and reset cycles without damage.

[0056] Moreover, the distance from the fixing point of each rope to the axis of the connecting rod 1 is consistent, and the lever arm is the same, ensuring that the tension is distributed proportionally according to the number of ropes. In this embodiment, with 8 ropes, each rope bears 1 / 8 of the tension. This effectively avoids the breakage of a single rope due to overload, while also preventing the disc 22 from shifting under force, ensuring the smoothness of the meshing transmission between the cylinder 21 and the extension section 12, and further enhancing the overall structural stability of the device.

[0057] Preferably, the elastic element 3 is a spring, which is sleeved on the extension section 12. The end of the extension section 12 away from the pulling section 11 is provided with a tray 120. One end of the elastic element 3 is in contact with the tray 120, and the other end is in contact with the inner side of the cylinder 21 at the closed end.

[0058] The spring is fitted onto the extension section 12, which serves as the spring's "axial guide shaft," forcing the spring to compress along the axis of the extension section 12 and completely avoiding the risk of misalignment or jamming. Regardless of the speed at which the extension section 12 moves, the spring always deforms uniformly along the axial direction, stably absorbing the initial impact energy; the guiding precision of the extension section 12 ensures that the primary energy dissipation remains effective.

[0059] The tray 120 can serve as a "force transfer carrier" to achieve uniform force transmission. The tray 120 is fixed to the extension section 12, and its end face area is much larger than the end area of ​​the extension section 12. It can evenly distribute the axial compressive force of the extension section 12 to the entire end face of one end of the spring. The two ends of the spring are "fully fitted" to the inner side of the tray 120 and the closed end of the cylinder 21, respectively. When compressed, the spring deforms uniformly as a whole, which not only avoids local overload damage, but also maximizes the deformation energy dissipation capacity of the spring and ensures stable primary energy dissipation efficiency.

[0060] Preferably, the connecting cylinder 2 further includes a turntable 20, which has an inner ring hole corresponding to the position of the first through hole 210. The outer ring edge of the turntable 20 is rotatably disposed on the inner side wall of the cylinder 21, and the other end of the elastic member 3 is in contact with the turntable 20.

[0061] Because the connecting cylinder 2 rotates during energy dissipation, the contact end between the elastic element 3 and the connecting cylinder 2 will rub against each other due to the rotation of the connecting cylinder 2, causing damage to the contact point. Even worse, when the cylinder 21 rotates, the other end of the elastic element, which is attached to the fixed tray 120, cannot move with it, causing the elastic element 3 to be forcibly twisted. Therefore, a turntable 20 is rotatably mounted on the inner wall of the cylinder 21 via its outer ring edge, forming a transitional carrier that does not rotate synchronously with the cylinder 21. The other end of the elastic element 3 is attached to the turntable 20. When the cylinder 21 rotates, the turntable 20 will not rotate synchronously, forming a state of "no relative twisting" with the "fixed tray 120" at one end of the elastic element 3. The elastic element 3 only bears axial compressive force, without any torsional stress, completely eliminating motion interference.

[0062] Preferably, the outer ring edge of the turntable 20 is provided with multiple sets of first annular grooves, and the inner sidewall of the cylinder 21 is provided with multiple sets of second annular grooves corresponding one-to-one with the positions of the first annular grooves. The first annular grooves and the second annular grooves constitute rolling grooves, and multiple balls are arranged in the rolling grooves. The rolling grooves, together with the balls, convert "sliding friction" into "rolling friction", which greatly reduces rotational resistance. On the one hand, this ensures the smooth rotation of the cylinder 21, and on the other hand, it effectively prevents the turntable 20 from rotating synchronously with the cylinder 21.

[0063] Example 2 Unlike Example 1, preferred embodiment, such as Figure 7 , Figure 8 , Figure 9As shown, the connecting cylinder 2 also includes a cable harness 23, which is a disc structure with an inner annular hole. The diameter of the inner annular hole is larger than the diameter of the cylinder 21. The cable harness 23 is sleeved on the cylinder 21 and can slide along the length of the cylinder 21. Multiple third through holes 230 are provided circumferentially along the axis of the cable harness 23, and the ends of the multiple ropes 4 pass through the third through holes 230 one by one. It should be noted that a limiting block is provided at the end of the rope 4 away from the pulling section 11. The size of the limiting block is larger than the diameter of the third through hole 230, effectively preventing the rope 4 from falling out of the third through hole 230.

[0064] In practical use, the end of rope 4 furthest from the pulling section 11 is subjected to gravity and passes through the second perforation 220 perpendicularly to the ground. This leads to a risk of the ends of multiple ropes 4 crossing each other after hanging down, which greatly affects the energy dissipation process. The rope harness 23 can effectively limit the movement of each rope 4, ensuring that the ropes 4 always maintain an effective distance from each other, achieving physical separation, preventing cross contact during movement, and completely avoiding tangling and knotting. Combined with the second perforation 220 of the disc body 22, it forms a "double-point positioning" to ensure that each rope moves along the preset path, the winding process is smooth and unobstructed, and the secondary energy dissipation is continuously effective.

[0065] The third through hole 230 of the cable tie 23 is arranged circumferentially along the axis and corresponds one-to-one with the second through hole 220 of the disc 22. Each rope 4 needs to pass through the "second through hole 220-third through hole 230" in sequence to form "double guidance" to ensure that the rope is always evenly distributed circumferentially. The cable tie 23 can slide along the length of the cylinder 21 and can adaptively adjust its position as the rope 4 is wound / unwound to avoid the rope from shifting due to changes in length, and ultimately ensure that the rope strands are tightly and evenly wound.

[0066] After the impact ends, the tension of the anchor rope is released, and the rope 4 is released under the action of the elastic element 3. The cable tie 23 can slide along the cylinder 21 away from the pulling section 11 under the influence of gravity, and guide each rope back to its initial position through the third through hole 230.

[0067] Example 3 Unlike Example 2, as follows: Figure 10 , Figure 11 As shown, preferably, a limiting groove 211 is provided on the outer side wall of the cylinder 21 along the length direction, and a limiting block 2300 is provided on the inner ring of the wire harness 23, with the limiting block 2300 engaging within the groove 211. This structure ensures that the wire harness 23 can slide along the length direction of the cylinder 21, while maintaining axial rotation with the cylinder 21; that is, only the limiting block 2300 is allowed to slide axially, completely restricting the relative circumferential rotation of the wire harness 23 on the cylinder 21.

[0068] This is mainly because the rope 4 needs to be wound around the pulling section 11 to form a rope strand. Therefore, the cable tie 23 can ensure that the second perforation 220 and the third perforation 230 do not have relative displacement in the circumferential direction as the cylinder 21 rotates, which further prevents the rope 4 between the second perforation 220 and the third perforation 230 from getting tangled.

[0069] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. An energy-dissipating fender device for a flexible protective barrier for a slope, characterized in that, The utility model relates to a connecting rod, connecting cylinder and elastic element, and the connecting rod is fixed with the connecting cylinder through the elastic element. The connecting rod comprises: a pulling section fixed with a pulling anchor rope at one end; and a penetrating section in the form of a screw rod, which has a helical groove on the side wall, and one end of the penetrating section is fixed on the pulling section. The connecting cylinder comprises: a cylinder body with a closed end at one end and rotatably connected with the anchor rod / anchor cable at the other end; a first through hole is formed on the closed end of the cylinder body, and the first through hole has a tooth block matched with the helical groove; the cylinder body is sleeved on the penetrating section, and the penetrating section can pass out of the first through hole; when the pulling anchor rope pulls the pulling section, the penetrating section moves with the pulling section and passes out of the first through hole, and at this time, the tooth block slides in the helical groove to convert the linear motion of the penetrating section into the rotation of the cylinder body; a disc body is fixed on the outer side wall of the cylinder body, and the disc body is provided with a plurality of second through holes. The elastic element is located inside the cylinder body, one end of the elastic element is attached to the penetrating section, and the other end of the elastic element is attached to the cylinder body; when the penetrating section passes out of the cylinder body through the first through hole, the elastic element is extruded to deform to dissipate energy. A plurality of ropes are provided, one end of each of the plurality of ropes is fixed on the pulling section, and the other end of each of the plurality of ropes passes through the second through hole one by one; when the pulling anchor rope pulls the pulling section, one end of each of the plurality of ropes moves with the pulling section, at this time, the disc body rotates with the cylinder body, the plurality of ropes rotate with the disc body and are wound on the pulling section to form a rope strand, and the plurality of ropes in the rope strand and the plurality of ropes and the pulling section are extruded to dissipate energy.

2. A device for dissipating energy and buffering for a flexible protection screen for a slope according to claim 1, characterized in that, The ratio of the helical groove pitch to the rod diameter of the connecting rod is (1.2-2):

1.

3. A device for dissipating energy for a flexible protective screen for slopes according to claim 1, characterized in that, The rope comprises a rope body and an elastic tube wrapped on the outer side wall of the rope body, the elastic tube is made of flexible material, and the elastic tube deforms to dissipate energy when the elastic tube is extruded between the plurality of ropes and between the plurality of ropes and the pulling section.

4. A device for dissipating energy for a flexible protective screen for slopes according to claim 3, characterized in that, The ratio of the tube wall thickness of the elastic tube to the diameter of the rope body is 1:(1.5-3).

5. A device for dissipating energy for a flexible protective screen for slopes according to claim 3, characterized in that, The pulling section is provided with a fixing disc, a plurality of fixing holes are circumferentially arranged on the fixing disc along the axis of the connecting rod, and the plurality of rope bodies are fixed on the fixing holes one by one.

6. A device for dissipating energy for a flexible protective screen for slopes according to claim 1, characterized in that, The elastic element is a spring, the spring is sleeved on the penetrating section, one end of the spring is attached to a tray provided on the end of the penetrating section away from the pulling section, and the other end of the spring is attached to the inside of the closed end of the cylinder body.

7. A device for dissipating energy for a flexible protective screen for slopes according to claim 6, characterized in that, The connecting cylinder further comprises a rotating disc, the rotating disc has an inner ring hole corresponding to the position of the first through hole, the outer ring edge of the rotating disc is rotatably arranged on the inner side wall of the cylinder body, and the other end of the elastic element is attached to the rotating disc.

8. A device for dissipating energy for a flexible protective screen for slopes according to claim 7, characterized in that, The outer ring edge of the rotating disc is provided with a plurality of first ring grooves, the inner side wall of the cylinder body is provided with a plurality of second ring grooves corresponding to the positions of the first ring grooves one by one, the first ring grooves and the second ring grooves form rolling grooves, and a plurality of rolling balls are arranged in the rolling grooves.

9. A device for dissipating energy for a flexible protective screen for slopes according to claim 1, characterized in that, The connecting cylinder further comprises a wire binding element, the wire binding element is in the form of a disc body, the wire binding element has an inner ring hole, the hole diameter of the inner ring hole is larger than the cylinder diameter of the cylinder body, the wire binding element is sleeved on the cylinder body and can slide along the length direction of the cylinder body, a plurality of third through holes are circumferentially arranged on the wire binding element along the axis, and the end portions of the plurality of ropes pass through the third through holes one by one.

10. A device for dissipating energy for a flexible protective screen for slopes according to claim 9, characterized in that, A limiting sliding groove is arranged on the outer side wall of the cylinder body along the length direction, a limiting block is arranged on the inner ring of the wire binding element, and the limiting block is clamped in the sliding groove.

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