Temporary active hanging point and installation method of wind turbine hoisting safety belt

Abstract

This invention relates to the field of construction safety technology, and discloses a temporary movable attachment point and installation method for a safety belt used in the hoisting of a wind turbine generator set. The method includes a ring-shaped load-bearing rope; both ends of the ring-shaped load-bearing rope are equipped with matching locking connectors, and at least two anti-slip limiting components are spaced apart on the rope body. The spacing between the two anti-slip limiting components matches the width of the horizontal bar of the hoisting tool for the wind turbine generator set. The anti-slip limiting component is a ring structure, and its inner diameter is interference-fitted with the rope body of the ring-shaped load-bearing rope. Several ring-shaped anti-slip protrusions are provided on the outer surface of the anti-slip limiting component. This invention solves the problems of insufficient load-bearing capacity and easy slippage by quickly wrapping the ring-shaped load-bearing rope around the horizontal bar with the locking connectors, combined with the anti-slip limiting components to prevent slippage. The anti-slip protrusions and quick-locking mechanism allow for flexible movement without repeated untying and binding, improving efficiency. It is adaptable to horizontal bars of different widths without damaging the equipment, improving versatility and protection.

Description

Technical Field

[0001] This invention relates to the field of construction safety technology, and in particular to a temporary movable attachment point for a safety belt during the hoisting of a wind turbine generator set. Background Technology

[0002] In wind turbine installation and maintenance, blade hoisting is one of the core procedures. Due to the generally large size and weight of blades, specialized hoisting tools are required to clamp and secure the blades in the middle before a crane lifts them to the hub docking position. To ensure the reliability of the connection between the blade and the hoisting tool, workers must stand in the middle of the blade, which is suspended more than 2 meters above the ground, to complete critical operations such as securing the slings and tightening the bolts. Safety protection for high-altitude operations is paramount. Currently, mainstream wind turbine blade hoisting tools in the industry focus on blade clamping stability (such as hydraulic clamping mechanisms and anti-slip pads), hoisting balance control (such as adjustable lifting points), and structural strength, and generally do not have compliant attachment points specifically for securing safety belts. Due to this limitation, on-site workers can only use various temporary alternatives: tying safety belts to the flange bolts at the blade root, attaching them to the crossbars or connecting rods of the hoisting tool frame, or using ordinary nylon rope wrapped around the hoisting tool as an attachment point.

[0003] However, the aforementioned temporary solutions have significant drawbacks. First, they are severely inadequate in terms of safety: the flange bolts are not designed for load-bearing, the crossbars of the lifting equipment are mostly thin-walled structures that have not been tested for fall impact resistance, and the ordinary nylon ropes have low strength, are easily worn, and lack anti-slip structures. None of these meet the requirement of "rated tensile strength of the attachment point not less than 22kN" in GB6095-2021 "Fall Protection Safety Belts." If a worker loses balance and falls, the protection is highly likely to fail. Second, the operation is inefficient: the temporary attachment points are fixed or inconvenient to adjust. Workers need to spend 3-5 minutes repeatedly disassembling and securing the safety belt every 1-2 meters, significantly extending the work period. Third, they have poor adaptability and are prone to damaging equipment: different models of lifting equipment have significantly different structural dimensions, making it difficult to use temporary attachment points interchangeably. Furthermore, securing them may scratch the coating of the lifting equipment or the flange blades, affecting the service life of the equipment. Summary of the Invention

[0004] To address existing problems, this invention provides a temporary movable attachment point and installation method for a safety belt used in the hoisting of wind turbine generator sets. The method utilizes a loop-shaped load-bearing rope with locking buckles at both ends to quickly wrap around the crossbar of the lifting device, along with anti-slip limiting components matching the width of the crossbar to prevent rope slippage. This solves the safety hazards of insufficient load-bearing strength and easy slippage and fall of the temporary attachment point. The anti-slip protrusions and quick-locking buckle design with an interference fit allow the attachment point to move flexibly along the crossbar without repeated untying and untying, improving the efficiency of high-altitude mobile operations. Simultaneously, this structure is adaptable to crossbars of different widths and avoids damage to the equipment surface, improving versatility and equipment protection performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A temporary movable attachment point for a safety belt during wind turbine hoisting includes a ring-shaped load-bearing rope; both ends of the ring-shaped load-bearing rope are provided with matching locking connectors, and at least two anti-detachment limiting members are provided at intervals on the rope body, the spacing between the two anti-detachment limiting members matching the width of the lifting tool crossbar for hoisting the wind turbine generator; the anti-detachment limiting member is a ring structure, and its inner diameter is interference-fitted with the rope body of the ring-shaped load-bearing rope; several ring-shaped anti-slip protrusions are provided on the outer surface of the anti-detachment limiting member.

[0007] As a further improvement of the present invention, the inner diameter of the anti-detachment limiting component and the diameter of the annular load-bearing rope are interference fit, with a maximum interference of 0.5 mm.

[0008] As a further improvement of the present invention, the thickness of the annular anti-slip protrusion is 1-2 mm.

[0009] As a further improvement of the present invention, the anti-detachment limiting component is made of rubber with a Shore hardness of 70-80HA.

[0010] As a further improvement of the present invention, the ring-shaped load-bearing rope is made of ultra-high molecular weight polyethylene, with a breaking strength ≥30kN and a rope diameter of 16-20mm.

[0011] As a further improvement of the present invention, the surface of the annular load-bearing rope is wrapped with a polyurethane wear-resistant layer, the thickness of which is 2-3mm.

[0012] As a further improvement of the present invention, the locking connector is forged from No. 45 steel and galvanized for rust prevention.

[0013] As a further improvement of the present invention, the annular load-bearing rope is also provided with a hanging point marker, which includes a reflective strip and a fluorescent strip.

[0014] As a further improvement of the present invention, the material of the hanging point marker is ABS plastic.

[0015] This invention also discloses a method for installing temporary movable attachment points for safety belts during the hoisting of wind turbine generator sets, comprising the following steps: S1: Adjust the spacing between the two anti-detachment limiters on the ring-shaped load-bearing rope according to the width of the crossbar of the wind turbine generator set, so that the spacing between the two anti-detachment limiters matches the width of the crossbar. S2: Wrap the ring-shaped load-bearing rope around the crossbar of the lifting device, so that the two anti-detachment limiting pieces are located on both sides of the crossbar, and lock the two ends of the ring-shaped load-bearing rope together through the locking connector, so that the ring-shaped load-bearing rope forms a closed loop and is wrapped around the crossbar. S3: By interfering with the inner side of the anti-slip limiter to the rope body of the ring-shaped load-bearing rope, the sliding of the anti-slip limiter relative to the ring-shaped load-bearing rope is restricted. At the same time, the ring-shaped anti-slip protrusion on the outer side of the anti-slip limiter abuts against the side of the crossbar to prevent the ring-shaped load-bearing rope from moving around the crossbar during use. S4: Hook the safety belt of the worker at height onto the loop-shaped load-bearing rope to form a temporary movable attachment point; when the worker moves on the horizontal bar, the loop-shaped load-bearing rope slides synchronously with the worker.

[0016] The present invention has the following beneficial effects: The rope is quickly wrapped and fixed to the horizontal bar of the lifting device by the locking joints at both ends of the ring-shaped load-bearing rope, and the two anti-slip limiters clamp the two sides of the horizontal bar. At the same time, the interference fit ring anti-slip protrusion prevents the rope from slipping, which solves the problems of insufficient load-bearing strength and easy fall-off of temporary attachment points, and realizes a safe, reliable and flexible high-altitude safety belt attachment point.

[0017] Preferably, the interference fit ensures that the anti-slip limiting component is firmly fixed on the rope and does not slip freely, while avoiding excessive interference that could lead to installation difficulties or damage to the rope, thus improving the stability and service life of the hanging point positioning.

[0018] Preferably, this thickness ensures sufficient frictional contact with the surface of the lifting bar, preventing axial movement of the hanging point during use, while also preventing excessive protrusion from affecting rope bending or tangling operations.

[0019] Preferably, this hardness range allows the limiting element to have both sufficient elasticity to fit tightly against the crossbar and rope, and the necessary compressive strength to resist compression deformation during hoisting, thereby continuously providing a reliable anti-slip locking effect.

[0020] Preferably, the high-strength material ensures that the rated load-bearing capacity of the hanging point is far higher than the national standard safety requirement of 22kN, while the reasonable rope diameter balances strength and flexibility, making it easy for workers to operate the winding and unlocking with one hand.

[0021] Preferably, the wear-resistant layer effectively prevents cutting damage caused by repeated friction between the rope and the crossbar of the lifting device, while increasing the surface friction coefficient, further enhancing the anti-slip ability and anti-aging performance of the hanging point on the crossbar.

[0022] Preferably, the forging process ensures the structural integrity of the joint under high loads, while the galvanized layer resists corrosion in marine or humid environments, ensuring the reliability of the connection after long-term repeated use.

[0023] Preferably, at night or in dim conditions, the dual cues of reflective and fluorescent light enable workers to quickly locate the anchor point, avoid misoperation, and improve operational safety in complex lighting environments.

[0024] Preferably, ABS material has good impact resistance, weather resistance and processability, and is not prone to aging and cracking in outdoor high humidity and salt spray environments, ensuring that the signage is clearly visible for a long time.

[0025] This installation method involves first securing the loop-shaped load-bearing rope to the crossbar of the lifting device, then using an interference-fit anti-slip limiting device to axially limit the rope's movement relative to the crossbar. This allows the entire anchor point to slide freely on the crossbar without repeated disassembly and reassembly, solving the problem of operators frequently needing to re-secure their safety belts when moving on the crossbar. This significantly improves the efficiency and safety of high-altitude mobile operations. Simultaneously, the method utilizes the bidirectional clamping of the anti-slip limiting device and the frictional action of the anti-slip protrusions to ensure the anchor point will not slip or detach during operation due to personnel movement or accidental pulling. The method is simple, highly operable, and can be quickly completed by a single person without special tools. It is applicable to crossbars of different widths, demonstrating good versatility and site adaptability. Attached Figure Description

[0026] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and are not intended to specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is an overall diagram of a temporary movable attachment point for a safety belt during the hoisting of a wind turbine generator set, as described in Example 1. Figure 2 This is a step diagram illustrating the installation method of a temporary movable attachment point for a safety belt during the hoisting of a wind turbine generator set, as described in Example 1. Figure 3 This is an overall diagram of a temporary movable attachment point for a safety belt during the hoisting of a wind turbine generator set, as described in Example 2. The components include: 1. Lifting crossbar; 2. Ring-shaped load-bearing rope; 3. Anti-detachment limiting component; 4. Safety rope buckle; and 11. Locking connector. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0028] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0029] Unless otherwise defined below, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Example 1 like Figure 1 As shown, a temporary movable attachment point for a safety belt during the hoisting of a wind turbine generator set includes a ring-shaped load-bearing rope; the length of the ring-shaped load-bearing rope is 1.2-2.0m.

[0031] The circular load-bearing rope has matching locking connectors 11 at both ends. The locking connectors 11 are forged from 45# steel and galvanized for rust prevention. At least two anti-detachment limiting elements are spaced apart on the rope body, with the spacing between them matching the width of the lifting tool's crossbar. The anti-detachment limiting elements are circular in structure, with their inner diameter interlocking with the rope body. They are made of rubber with a Shore hardness of 70-80 HA. Several annular anti-slip protrusions are provided on the outer surface of the anti-detachment limiting elements. The thickness of these annular anti-slip protrusions is 1-2 mm.

[0032] In this embodiment, a safety rope buckle 4 is attached to the loop-shaped load-bearing rope. The safety rope buckle 4 is an automatic locking type. The loop-shaped load-bearing rope itself forms a closed loop, and there is no risk of slippage after the safety belt buckle is engaged. In addition, the markings clearly indicate the attachment point area, eliminating the hidden danger of accidentally attaching to non-load-bearing parts. The inner diameter of the anti-slip limiting component and the diameter of the ring-shaped load-bearing rope are interference fit, with a maximum interference of 0.5mm.

[0033] The circular load-bearing rope is made of ultra-high molecular weight polyethylene (UHMWPE), with a tensile strength ≥30kN, far exceeding the national standard requirement of 22kN. It can easily withstand the impact of a worker falling (the typical impact force of a human fall is ≤15kN). Furthermore, the load-bearing strength of the rope is consistent with the rope body after the locking buckles at both ends, with no weak points. The surface polyurethane wear-resistant layer resists metal-to-metal friction, preventing strength loss due to rope wear, and has a service life of over 5 years. The rope diameter is 16-20mm. The surface of the circular load-bearing rope is covered with a polyurethane wear-resistant layer, with a thickness of 2-3mm.

[0034] The ring-shaped load-bearing rope is also equipped with hanging point markers, which include reflective strips and fluorescent strips.

[0035] The hanging point markers are made of ABS plastic.

[0036] The overall design of this temporary activity attachment point complies with national standards such as GB6095-2021 "Fall Protection Safety Belt" and GB24544-2009 "Fall Protection Connector". The load-bearing capacity and anti-detachment structure of the attachment point have passed compliance verification and can meet the requirements of enterprise safety management and industry supervision. like Figure 2 As shown in this embodiment, a method for installing a temporary movable attachment point for a safety belt during the hoisting of a wind turbine generator set includes the following steps: S1: Adjust the spacing of the two anti-detachment limiting pieces 3 on the ring-shaped load-bearing rope 2 according to the width of the crossbar 1 of the wind turbine generator set, so that the spacing of the two anti-detachment limiting pieces 3 matches the width of the crossbar. S2: Wrap the ring-shaped load-bearing rope 2 around the horizontal bar 1 of the lifting device, so that the two anti-detachment limiting parts 3 are located on both sides of the horizontal bar 1 respectively, and lock the two ends of the ring-shaped load-bearing rope 2 through the locking connector 11, so that the ring-shaped load-bearing rope 2 forms a closed loop and is wrapped around the horizontal bar 1. S3: By interfering with the inner side of the anti-slip limiting member 3 with the rope body of the ring-shaped load-bearing rope 2, the sliding of the anti-slip limiting member 3 relative to the ring-shaped load-bearing rope 2 is restricted. At the same time, the ring-shaped anti-slip protrusion on the outer side of the anti-slip limiting member 3 abuts against the side of the crossbar 1 to prevent the hanging point from moving along the crossbar 1 during use. S4: Attach the safety belt hook of the worker at height to the ring-shaped load-bearing rope 2 to form a temporary movable attachment point; when the worker moves on the horizontal bar 1, the ring-shaped load-bearing rope 2 slides synchronously with the worker.

[0037] In the specific operation process, first prepare one set of temporary safety belt anchor points, including one loop load-bearing rope, two anti-detachment limiters, and one anchor point marker; the blade to be hoisted is 68m long, with a root flange diameter of 2.2m; the blade lifting tool is model DJ-4.5, with rectangular crossbars of 80mm×50mm, wall thickness of 10mm, and crossbar spacing of 1.2m; the worker's safety belt conforms to GB6095-2021, the main safety rope is 3m long, and equipped with an automatic locking buckle; check the tools, including a measuring tape and a tensile tester. Then confirm the working environment and parameters, the on-site wind speed must be ≤6m / s, and there should be no severe weather such as thunderstorms or sandstorms. Measure the dimensions (80mm×50mm) and spacing (1.2m) of the lifting tool crossbars, and confirm that the length of the loop load-bearing rope (e.g., 1.5m) matches the spacing of the anti-detachment limiters (e.g., 400mm). Inspect the rope for wear, breakage, or loose joints. Apply a 10kN pre-tension force using a tensile tester to confirm there is no abnormal deformation. Then, remove the ring-shaped load-bearing rope. Align the male and female buckles of the safety rope clips and insert them forcefully. A click sound indicates that the spring lock pin is locked. Hold both ends of the rope with both hands and apply a 500N pull in the opposite direction. Check that the joints are not separated or loose, confirming that the ring structure is reliably closed. At this point, the inner diameter of the ring is approximately 1.2m, matching the spacing of the lifting tool's crossbar.

[0038] Example 2 like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that: 1) Two safety rope clips 4 are attached to the ring-shaped load-bearing rope.

[0039] Two safety rope clips 4 allow for the attachment of two safety ropes.

[0040] The present invention has the following advantages: 1. Quick assembly and disassembly: The ring-shaped load-bearing rope is connected end to end by a quick-release buckle and can be directly slipped onto the horizontal bar of the lifting device for fixation. The operation can be completed by one person in 1-2 minutes without the need for tools. When disassembling, simply press the locking pin to separate the connector and remove it. This method is more than 80% more efficient than traditional binding methods.

[0041] 2. High adaptability: The rope length and anti-detachment limiter spacing can be customized according to the lifting device specifications, which can be adapted to most models of blade lifting devices on the market and is suitable for crossbars of different cross sections and sizes, without the need for repeated adjustments for different lifting devices.

[0042] 3. Uninterrupted mobile operation: When working at height, the safety belt buckle can slide freely along the loop load-bearing rope. There is no need to repeatedly remove and reattach during the movement, and the safety protection is always maintained, eliminating the protection gap caused by temporary unhooking.

[0043] 4. Controllable cost: The core components are high-strength synthetic fiber rope and metal joints, with low material costs. The cost of a single set of equipment is about one-third of that of traditional metal hanging points. There is no complicated mechanical structure, and daily maintenance only requires checking the wear of the rope.

[0044] 5. Non-destructive installation: The rope and anti-detachment limiter are made of non-metallic materials or wrapped with a non-metallic protective layer, so they will not scratch the surface coating or metal structure when in contact with the lifting device or blades; the ring winding method is adopted, which does not require bolt fixing or welding and does not change the original structure of the lifting device.

[0045] 6. Easy to carry: Each unit weighs approximately 0.8-1.2kg and can be folded and stored in a toolbox for easy transportation; it requires no electricity or hydraulic assistance and is suitable for wind farm field operations, especially for hoisting needs in remote wind farms.

[0046] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions, and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temporary active hanger point for a wind turbine hoist safety belt, characterized in that, It includes a ring-shaped load-bearing rope (2); both ends of the ring-shaped load-bearing rope (2) are provided with matching locking connectors (11), and at least two anti-detachment limiting parts (3) are provided at intervals on the rope body of the ring-shaped load-bearing rope (2), the distance between the two anti-detachment limiting parts (3) is matched with the width of the lifting tool crossbar (1) of the wind turbine generator set; the anti-detachment limiting part (3) is a ring structure, and its inner diameter is interference fit with the rope body of the ring-shaped load-bearing rope (2); several ring-shaped anti-slip protrusions are provided on the outer surface of the anti-detachment limiting part (3).

2. A temporary active hanger point for a wind turbine hoist belt according to claim 1, characterized in that, The inner diameter of the anti-detachment limiting component (3) and the diameter of the annular load-bearing rope (2) are interference fit, with a maximum interference of 0.5 mm.

3. A temporary active hanger point for a wind turbine hoist belt according to claim 1, characterized in that, The thickness of the annular anti-slip protrusion is 1-2 mm.

4. The temporary active hanger point for a wind turbine hoist line according to claim 1, wherein, The anti-detachment limiting component (3) is made of rubber with a Shore hardness of 70-80HA.

5. A temporary active lifting point for a wind turbine hoist harness according to claim 1, wherein, The ring-shaped load-bearing rope (2) is made of ultra-high molecular weight polyethylene, with a breaking strength ≥30kN and a rope diameter of 16-20mm.

6. A temporary active hanger point for a wind turbine hoist belt according to claim 1, wherein, The surface of the ring-shaped load-bearing rope (2) is wrapped with a polyurethane wear-resistant layer, the thickness of which is 2-3 mm.

7. A temporary active hanger point for a wind turbine hoist belt according to claim 1, wherein, The locking connector (11) is forged from No. 45 steel and galvanized for rust prevention.

8. A temporary active hanger point for a wind turbine hoist belt according to claim 1, wherein, The ring-shaped load-bearing rope (2) is also equipped with hanging point markers, which include reflective strips and fluorescent strips.

9. A temporary active hanger point for a wind turbine hoist belt according to claim 8, characterized in that, The material of the hanging point marker is ABS plastic.

10. The method of installing a temporary active hoist point for a wind turbine hoist harness of any of claims 1-9, wherein, Includes the following steps: S1: Adjust the spacing between the two anti-detachment limiting pieces (3) on the ring-shaped load-bearing rope (2) according to the width of the crossbar (1) of the wind turbine generator set, so that the spacing between the two anti-detachment limiting pieces (3) matches the width of the crossbar. S2: Wrap the ring-shaped load-bearing rope (2) around the horizontal bar (1) of the lifting device, so that the two anti-detachment limiting parts (3) are located on both sides of the horizontal bar (1), and lock the two ends of the ring-shaped load-bearing rope (2) through the locking connector (11) so that the ring-shaped load-bearing rope (2) forms a closed loop and is wrapped around the horizontal bar (1). S3: By interfering with the inner side of the anti-slip limiting member (3) to the rope body of the ring load-bearing rope (2), the sliding of the anti-slip limiting member (3) relative to the ring load-bearing rope (2) is restricted. At the same time, the ring anti-slip protrusion on the outer side of the anti-slip limiting member (3) abuts against the side of the crossbar (1) to prevent the ring load-bearing rope (2) from moving around the crossbar during use. S4: Hook the safety belt of the high-altitude worker onto the ring-shaped load-bearing rope (2) to form a temporary movable attachment point; when the worker moves on the horizontal bar (1), the ring-shaped load-bearing rope (2) slides synchronously with the worker.

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