Falling protection device based on flexible rail

Abstract

The utility model provides a kind of anti-falling device based on flexible track, to solve the problems of the moving smoothness of prior art's anti-falling device, device adaptability and the deficiency of protective durability. The utility model mainly includes steel strand guide rail, tension adjusting mechanism being arranged at the end of the steel strand guide rail, and overhooker guiding anti-drop mechanism being spaced apart on the steel strand guide rail;The utility model is cooperatively designed by flexible steel strand guide rail+staged tensioning fixed end+intervalized guiding anti-drop, uses high-strength steel strand as the moving bearing body of anti-falling sliding block, realizes guide rail tension accurate adjustment by the cooperation of multi-specification fixed end and basket bolt, then limits the steel strand path by the overhooker arranged at fixed distance, matches anti-drop assembly and special fastener, ensures that sliding block is smoothly passed when high-altitude operation, there is no derailment risk, simultaneously adapts to the installation environment of outer angle steel of iron tower, gives consideration to installation accuracy and environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude operation protection equipment technology, and in particular to a fall prevention device based on a flexible track. Background Technology

[0002] With the continuous development of my country's power industry, high-altitude operations on transmission towers, as the core supporting structure of power transmission lines, are becoming increasingly frequent. Workers often need to climb to different heights to perform tasks such as stringing lines and maintenance, making safety during these operations paramount. Currently, the common safety measure is a combination of flexible tracks, such as steel wire ropes, and self-locking devices. This involves laying steel wire ropes along the tower to form a continuous safety passage, with workers using self-locking devices for fall protection during movement. However, this traditional method still relies heavily on manual climbing and experience-based judgment, resulting in high labor intensity, low movement efficiency, and high safety risks. It fails to meet the overall requirements of modern power systems for safety, efficiency, and intelligence in high-altitude operations.

[0003] In Chinese patent literature, utility model patent publication number CN223248654U discloses a "high-altitude fall prevention device for flexible guide rails on iron towers." (See appendix to the aforementioned patent.) Figure 1 As shown, it mainly includes a support plate and an adjustment device. The adjustment device is provided on the surface of the support plate and includes a placement block that fits onto the surface of the support plate. Multiple support wheels and limit wheels are rotatably connected to both sides of the inner surface of the placement block. A lifting ring is fixedly connected to the bottom end of the placement block. A fixing device for fixation is also provided on the upper surface of the support plate. This device is designed to assist the movement of the fall arrester by using support wheels and limit wheels to reduce movement resistance and improve operational smoothness.

[0004] However, this existing technology still has the following technical pain points: Firstly, the smoothness of the fall arrestor's movement is still insufficient: Although the device is equipped with support wheels and limit wheels to assist in movement, it does not have an adaptive adjustment structure designed for the slight deformation or surface wear that may occur on the flexible guide rail during use. This causes the fall arrestor to easily get stuck due to uneven resistance during movement, which not only affects the accuracy of position adjustment, but also increases the operational burden on workers and the risk of working at height. Secondly, the adaptability of the fixing device is limited: its fixing block can only move in a limited way along the sliding groove of the fixing plate and be locked by the positioning pin. When facing different specifications of installation angle steel or non-standard installation surfaces on the iron tower, it is difficult to flexibly adapt to the differences in spacing and shape, which can easily lead to unstable fixing and affect the overall installation reliability and applicability of the device. Third, the protection and durability of key components are insufficient: for example, the soft sleeve of the lifting ring relies solely on the locking block for limiting, and after long-term use, the protective function is prone to failure due to material aging or loosening of the locking block; at the same time, the sliding contact part between the support plate and the placement block is not equipped with an effective wear-resistant reinforcement structure, and long-term friction can easily lead to excessive wear of the parts, which not only shortens the service life of the device, but also increases the maintenance frequency and cost.

[0005] Therefore, in order to address the above pain points, there is an urgent need for a new type of fall protection device for flexible tracks. Utility Model Content

[0006] To address the shortcomings of the existing technology, this application provides a fall arrest device based on a flexible track. High-strength steel strand serves as the moving load-bearing body of the fall arrest slider. The guide rail tension is precisely adjusted through the cooperation of multi-specification fixed ends and turnbuckles. The path of the steel strand is limited by hooks arranged at fixed intervals. Combined with anti-derailment components and special fasteners, the device ensures that the slider passes smoothly without the risk of derailment during high-altitude operations. It is also compatible with the installation environment of the external angle steel of the tower, taking into account both installation accuracy and environmental adaptability.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A fall arrest device based on a flexible track includes a steel strand guide rail, a tension adjustment mechanism disposed at the end of the steel strand guide rail, and a hook guide and anti-detachment mechanism disposed at intervals on the steel strand guide rail. The tension adjustment mechanism includes a tension clamp for holding and fixing the end of the steel strand, a U-shaped hanging ring connected to the tension clamp, and a turnbuckle connecting the two U-shaped hanging rings and having an adjustable spacing. The over-hook guide anti-detachment mechanism includes an L-shaped fixing plate for fixing to the angle steel of the tower crossarm, a flower wheel installed at the extended end of the L-shaped fixing plate, and an anti-detachment component disposed next to the flower wheel; the steel strand guide rail passes through the wheel groove of the flower wheel, and the anti-detachment component is sleeved around the outside of the flexible steel strand guide rail.

[0008] Furthermore, the anti-detachment component includes an anti-detachment rope loop disposed beside the flower wheel and sleeved on the outside of the steel strand guide rail, and a self-locking device integrated on the steel strand guide rail.

[0009] Furthermore, the L-shaped fixing plate of the hook guide anti-detachment mechanism is fixed to the angle steel of the tower crossarm by a fastening assembly, which includes a V-bolt, a flat washer, a nut, and a thin nut.

[0010] Furthermore, the four corners of the L-shaped fixing plate are reinforced with welded flat iron to increase local strength.

[0011] Furthermore, a closed pin is provided at the connection node between the turnbuckle and the U-shaped hanging ring.

[0012] Furthermore, the steel strand guide rail is made of high-carbon steel wire strand, carbon fiber composite strand, or galvanized aluminum-magnesium alloy steel wire strand.

[0013] The advantages of this utility model over the prior art are as follows: 1) Installation stability and tension controllability: This utility model, through the reliable clamping of the fixed end tension clamp, the precise adjustment of the 5 / 8 turnbuckle, and the anti-loosening design of the closed pin, can not only achieve precise control of the tension of the steel strand within the range of 1.2-1.5KN, eliminating the problem of guide rail slack and sagging or excessive tightness and deformation, but also ensure the long-term stability of the end anchor, so that the steel strand does not slip or loosen when bearing load, thus solving the problem of unstable bearing caused by the uncontrolled tension of traditional devices; (ii) Smooth guiding and reliable anti-derailment: This utility model uses the small gap between the hook pulley groove and the steel strand, combined with the secondary protection of the anti-derailment rope ring, and the strong connection of the V-bolt to the L-fixing plate. This ensures that the steel strand is accurately guided along the preset path, so that the anti-fall slider passes through without jamming or deviation, and effectively prevents the slider from accidentally derailing (derailment resistance ≥ 5kN). Structurally, it eliminates the safety hazards of poor guiding and easy derailment of traditional devices. (iii) Ease of installation and maintenance: The modular fixed end and hook assembly, combined with the special fastener design of "selecting V-bolts according to the L value of the installation position", reduces the dependence on workers' experience in installation and ensures consistency and accuracy when installing different iron towers; during maintenance, only periodic checks of fastener torque (once every six months) and steel strand surface wear (once a year) are required, and the device can be kept in good operating condition without complicated disassembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection of the tension adjustment mechanism in this utility model; Figure 2 This is a schematic diagram of the connection of the hook guide and anti-detachment mechanism in this utility model.

[0015] The components include: 1. Steel strand guide rail; 2. Tension clamp; 3. U-shaped hanging ring; 4. Turnbuckle; 5. Closed pin; 6. L-shaped fixing plate; 7. Flower wheel; 8. Anti-derailment ring; 10. V-bolt; 11. Flat washer; 12. Nut; 13. Thin nut; 14. Flat iron; 15. Crossbeam angle steel; 16. M16 bolt. Detailed Implementation

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0017] This invention provides a fall arrest device based on a flexible track, which aims to solve the problems of insufficient smoothness of movement, device adaptability, and protective durability of existing fall arrest devices.

[0018] like Figure 1 and Figure 2 As shown, the present invention mainly consists of a steel strand guide rail 1, a tension adjustment mechanism, and a hook guide and anti-derailment mechanism.

[0019] In one embodiment of this utility model, the steel strand guide rail 1 serves as the moving track for the anti-fall slider. It can be made of materials such as high carbon steel wire strand, carbon fiber composite strand, or galvanized aluminum-magnesium alloy steel wire strand to balance the requirements of strength, weight, and corrosion resistance.

[0020] In one embodiment of this utility model, the tension adjustment mechanism is located at the end of the steel strand guide rail 1 for anchoring and precisely adjusting the guide rail tension. Its structural components include a tension clamp 2, a U-shaped hanging ring 3, and a turnbuckle 4. The tension clamp 2 (which can be an NY80 type or a wedge-shaped, crimp-type clamp) firmly clamps the end of the steel strand through a clamping or wedge-shaped structure. The tension clamp 2 is connected to the 5 / 8 specification turnbuckle 4 via the U-shaped hanging ring 3. By rotating the screw of the turnbuckle 4, the distance between the two U-shaped hanging rings 3 can be precisely adjusted, thereby controlling the tension of the steel strand guide rail 1 within the ideal range of 1.2 to 1.5 kN. To ensure long-term reliability, a closed pin 5 (or a spring pin, etc.) is provided at the connection node between the turnbuckle 4 and the U-shaped hanging ring 3, effectively preventing loosening of the connection due to vibration.

[0021] In one embodiment of this utility model, the guide and anti-derailment mechanism of the hook device is spaced apart on the steel strand guide rail 1 to guide and prevent the anti-fall slider from derailing. This mechanism includes an L-shaped fixing plate 6, a flower wheel 7, and an anti-derailment component. The L-shaped fixing plate 6 is fixed to the crossarm angle steel 15 of the tower using a dedicated fastening component. The fastening component mainly includes V-bolts 10, flat washers 11, nuts 12, and thin nuts 13. The V-bolts 10, with their grooved design, can be stably secured to the angle steel and are locked in place by the L-shaped fixing plate 6 in conjunction with the nuts 12 and thin nuts 13, providing excellent anti-slip capability. To further enhance the strength of the connection point, 70*8 flat iron 14 is welded to the four corners of the contact surface between the L-shaped fixing plate 6 and the angle steel for local reinforcement.

[0022] Specifically, a patterned wheel 7 is installed at the extended end of the L-shaped fixing plate 6 using M16 bolts 16. The steel strand guide rail 1 is precisely inserted into the groove of the patterned wheel 7, with the gap between them controlled within 0.5 mm to ensure smooth passage of the anti-fall slider. An anti-derailment component is provided beside the patterned wheel 7, which includes a stainless steel wire braided anti-derailment rope ring 8 and a self-locking device 9 integrated on the steel strand guide rail 1. The anti-derailment rope ring 8 is looped around the outside of the steel strand guide rail 1 and works in conjunction with the self-locking device 9 to form a secondary anti-derailment protection with a derailment resistance of not less than 5 kN, effectively preventing the steel strand from slipping out of the patterned wheel groove.

[0023] It should be noted that the key components in this utility model (such as tension clamps, anti-derailment rings, V-bolts, etc.) are treated with galvanizing and stainless steel for corrosion and weather resistance. The stainless steel material of the anti-derailment ring does not rust after long-term use in the high-altitude environment of iron towers with strong winds and high humidity, enabling the device to withstand harsh working conditions, thereby significantly extending its service life and reducing the maintenance frequency caused by component corrosion and aging.

[0024] The working principle of this utility model is as follows: During installation, the steel strand guide rail 1 is first reliably anchored at both ends using a tension adjustment mechanism and adjusted to standard tension using turnbuckles 4. Then, multiple hook guide anti-derailment mechanisms are installed along the guide rail path on the tower crossarm angle steel 15 to ensure the steel strand guide rail 1 is correctly inserted into the grooves of each pulley 7, with anti-derailment protection provided by anti-derailment rope rings 8 and self-locking devices 9. During operation, the anti-fall slider can move smoothly along the tensioned steel strand guide rail 1. Under normal conditions, the slider runs smoothly under the guidance of the pulleys 7. In the event of a fall, the self-locking device 9 will instantly lock onto the steel strand guide rail 1 to prevent personnel from falling. The entire system, through the above structure, achieves integrated load-bearing, fixing, guiding, and anti-derailment functions, providing continuous and reliable safety protection for high-altitude operations.

[0025] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A fall arrest device based on a flexible track, characterized in that: It includes a steel strand guide rail (1), a tension adjustment mechanism disposed at the end of the steel strand guide rail (1), and a hook guide and anti-derailment mechanism disposed at intervals on the steel strand guide rail (1); The tension adjustment mechanism includes a tension clamp (2) for clamping and fixing the end of the steel strand, a U-shaped hanging ring (3) connected to the tension clamp (2), and a turnbuckle (4) that connects the two U-shaped hanging rings (3) and can adjust the spacing. The over-hook guide anti-detachment mechanism includes an L-shaped fixing plate (6) for fixing to the angle steel (15) of the tower crossarm, a flower wheel (7) installed at the extended end of the L-shaped fixing plate (6), and an anti-detachment component disposed on the side of the flower wheel (7); the steel strand guide rail (1) passes through the groove of the flower wheel (7), and the anti-detachment component is sleeved on the outside of the steel strand guide rail (1).

2. The fall arrest device based on a flexible track as described in claim 1, characterized in that: The anti-detachment component includes an anti-detachment rope ring (8) disposed on the side of the flower wheel (7) and sleeved on the outside of the steel strand guide rail (1), and a self-locking device integrated on the steel strand guide rail (1).

3. The fall arrest device based on a flexible track as described in claim 1, characterized in that: The L-shaped fixing plate (6) of the over-hook guide anti-detachment mechanism is fixed to the tower crossarm angle steel (15) by a fastening assembly, which includes a V-bolt (10), a flat washer (11), a nut (12) and a thin nut (13).

4. The fall arrest device based on a flexible track as described in claim 3, characterized in that: The four corners of the L-shaped fixing plate (6) are further reinforced by welding flat iron (14).

5. The fall arrest device based on a flexible track as described in claim 1, characterized in that: A closed pin (5) is provided at the connection node between the turnbuckle (4) and the U-shaped hanging ring (3).

6. The fall arrest device based on a flexible track as described in claim 1, characterized in that: The steel strand guide rail (1) is made of high carbon steel wire strand, carbon fiber composite strand or galvanized aluminum-magnesium alloy steel wire strand.

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