Loading ladder for paint spraying of wind power tower drum

Abstract

The utility model discloses an embarkation ladder for paint spraying of a wind power tower drum, which comprises a ladder assembly and a vertical frame structure formed by welding steel, and platforms which are arranged at intervals up and down are arranged in the vertical frame structure; the straight ladder is connected to the opening of each working platform, and a vertical channel is formed between every two adjacent working platforms; the tail end of the toppling inclined ladder is hinged to the working platform on the topmost layer of the ladder frame through a connecting pin shaft; the toppling inclined ladder is connected to the top of the ladder frame through a steel wire rope, and the steel wire rope is retracted and released to adjust the inclination angle. The four-in-one solution of full circumferential covering, dynamic fitting, wind resistance, stable load and intrinsic safety is formed, the paint spraying efficiency is improved, the accident rate is greatly reduced, and the safety boundary of wind power aerial work is redefined.

Description

Technical Field

[0001] This utility model relates to boarding ladders, and more particularly to a boarding ladder for spraying paint on wind turbine towers. Background Technology

[0002] As large cylindrical steel structures, wind turbine towers require frequent high-altitude operations for surface anti-corrosion painting maintenance. Currently used access equipment suffers from the following drawbacks:

[0003] Limited work coverage: Traditional fixed ladders or suspended platforms can only cover a single vertical area of ​​the tower. When performing full-circumference painting, the position of the equipment needs to be moved repeatedly, which not only greatly reduces work efficiency, but also increases the risk of personnel falling due to the movement of high-altitude equipment.

[0004] Insufficient adaptability to curved surfaces: The diameter of the tower changes with the height to form a continuous curved surface, while the existing climbing ladder adopts a rigid straight ladder structure, which cannot adaptively fit the curvature of the tower. This results in gaps between the ladder body and the tower wall, which affects the stability of the operation and makes it difficult to ensure construction safety.

[0005] Poor anti-tipping stability: In high-altitude, strong wind environments, traditional equipment lacks an effective anti-tipping mechanism. Especially when workers move the spraying equipment, the ladder frame is prone to swaying due to a shift in the center of gravity. Existing technology does not have a reliable bottom ballast system, posing a serious safety hazard.

[0006] Based on the above problems, there is an urgent need to develop a special boarding and alighting device that can adaptively fit the curved surface of the tower, achieve full circumferential coverage, and has anti-overturning capabilities. Utility Model Content

[0007] To address the shortcomings of the aforementioned technologies, this utility model provides a ladder for spray painting wind turbine towers.

[0008] To solve the above technical problems, the technical solution adopted by this utility model is: a ladder for spray painting wind turbine towers, comprising:

[0009] A ladder frame is a vertical frame structure welded from steel, with platforms spaced at intervals between the upper and lower sections within the vertical frame structure.

[0010] A straight ladder connects to the opening of each work platform and forms a vertical passage between two adjacent work platforms;

[0011] A tilting ladder, the end of which is hinged to the working platform at the top of the ladder frame via a connecting pin;

[0012] A hand-cranked winch connected to the top of the ladder frame via a steel wire rope can tilt the inclined ladder; the steel wire rope can be extended or retracted to adjust the tilt angle.

[0013] Furthermore, a steel pallet is welded to the bottom of the ladder frame, and the steel pallet has built-in fixed ballast.

[0014] Furthermore, there are two ladder frames symmetrically distributed on both sides of the wind turbine tower. Each ladder frame has a tilting inclined ladder with a guardrail hinged to it, and the two guardrails are connected by a guard chain.

[0015] Furthermore, the guardrail includes a first guardrail and a second guardrail, wherein the tail end of the first guardrail is hinged to the front end of the tiltable inclined ladder through a first hinge point;

[0016] The tail end of the second guardrail is hinged to the middle of the tilting ladder via a second hinge point, and its head end is hinged to the middle of the first guardrail via a third hinge point.

[0017] Furthermore, the tiltable staircase includes:

[0018] symmetrically arranged channel steel guardrails on both sides;

[0019] Steel mesh channel laid between the channel steel guardrails on both sides;

[0020] Shock absorbers installed at the bottom front end of the channel steel guardrail.

[0021] This utility model discloses a ladder for painting wind turbine towers. Through a symmetrical layout of double-sided ladder frames and an adjustable tilting ladder, combined with a closed-loop protective chain, it achieves full-circumferential coverage for wind turbine tower painting operations without the need for relocation. The inclined ladder employs a tail-end hinged pin and front-end steel wire rope traction structure to adapt to tower curvatures of different diameters. Combined with rubber shock absorbers and steel mesh channels, it ensures a tight, gapless fit. A concrete ballast block connected to a crossbeam at the bottom of the ladder frame enhances torsional stability, and the steel wire rope provides continuous tension when the ladder tilts. The guardrail and retractable protective chain form a closed-loop safety protection system, and the pin-type design facilitates quick assembly and disassembly. The overall solution achieves full-circumferential coverage, dynamic fit, wind resistance, and intrinsic safety, significantly improving painting efficiency, reducing accident rates, and redefining safety standards for high-altitude wind power operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0023] Figure 2 This is a schematic diagram of the structure of Example 2.

[0024] Figure 3 This is a diagram showing the working state of Example 1.

[0025] Figure 4 This is a diagram showing the working state of Example 2.

[0026] In the diagram: 100, ladder frame; 200, straight ladder; 300, tiltable inclined ladder; 400, hand-cranked winch; 500, rubber shock absorber; 600, guardrail; 101, working platform; 102, steel pallet; 301, channel steel guardrail; 302, steel mesh walkway; 401, steel wire rope; 601, first guardrail; 602, second guardrail; a, first hinge point; b, second hinge point; c, third hinge point. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Example 1:

[0029] like Figure 1 As shown, a ladder for spray painting wind turbine towers includes the following structure:

[0030] The ladder frame 100 adopts a single-sided welded steel frame structure, standing vertically on one side of the tower. Inside the frame, there are four layers of work platforms 101 spaced apart, with a spacing of 2-4 meters between the work platforms 101. The bottom of the ladder frame 100 is welded with a steel pallet 102, which is filled with concrete for ballast, with a total weight ≥500kg.

[0031] Straight ladder 200 is welded to the openings of the working platform of ladder frame 100 at both ends, forming a vertical climbing passage for construction workers to climb to each working platform 101. Straight ladder 200 is a galvanized steel structure with flat steel on both sides and 22X22 square steel in the middle. The spacing between the rungs is 300mm, and the surface is galvanized for rust prevention.

[0032] A tilting ladder 300 is hinged to a working platform 101 at the top of a ladder frame 100 via a pin. The tail end of the tilting ladder 300 is also hinged to the working platform 101 via a pin, and the front end is pulled by a steel wire rope 401 from a hand-cranked winch 400. The tilting ladder 300 includes channel steel guardrails 301 on both sides, with the channel steel being #10 and arranged symmetrically. Steel mesh channels 302 with 20×20mm mesh openings and anti-slip textured surfaces are laid between the channel steel guardrails 301. Rubber shock absorbers 500 are installed at the bottom front end of the channel steel guardrails 301 and fixed to the channel steel with M16 bolts. The rubber shock absorbers 500 make priority contact with the wind turbine tower to provide a buffering effect. The hand-cranked winch 400 is a commercially available product and mainly includes a winch base assembly, a central shaft, a ratchet, a pawl, a rotating handle assembly, a transmission gear, and a steel wire reel assembly. The precise cooperation between the handle, gear, and pawl allows the large gear to rotate smoothly. This transmission method effectively transmits power to the wire rope 401 drum, thereby achieving a labor-saving effect. The upper end of the tiltable inclined ladder 300 is connected to the wire rope 401 to adjust the tilt angle of the inclined ladder.

[0033] like Figure 3The diagram shown is illustrating the working state of Embodiment 1. The working steps of this embodiment are as follows:

[0034] Step 1: Equipment positioning and fixing. The ladder frame 100 is vertically erected on one side of the wind turbine tower and fixed to the ground by the fixing ballast of the bottom steel tray. The bottom steel tray is pre-filled with concrete ballast (total weight ≥ 500 kg). The operator climbs to the working platform 101 by the weight of the ballast, grabs the flat steel on both sides, and steps on the 22×22mm square steel footboards to rise to the target working platform 101.

[0035] Step 2: Adjust the tilting ladder to fit the curved surface of the tower. After personnel arrive at the top platform, operate the hand winch 400 to release the steel wire rope 401, so that the front end of the tilting ladder 300 slowly tilts down; observe the contact state between the rubber shock absorber 500 at the front end of the tilting ladder and the tower until they are completely in contact; rotate the hand winch 400 and adjust the tilt angle of the tilting ladder 300 through the steel wire rope 401 to make it fit tightly against the curved surface of the tower.

[0036] Step 3: Construction workers move up the tilting ladder 300 to the top of the tower for painting. The work platform 101 can be connected to the ladder frame 100 with connecting bolts as needed to achieve multi-level setup and cover the entire circumferential area.

[0037] Step 4: After the work is completed, move the boarding ladder to the next work point using a forklift.

[0038] Example 2:

[0039] like Figure 2 As shown, the difference in Embodiment 1 is the use of a double-sided ladder frame 100 structure, including two symmetrically distributed ladder frames 100, which stand vertically on both sides of the wind turbine tower. The frame is equipped with three-layer working platforms 101 with a layer spacing of 3 meters, and the bottom is rigidly connected by crossbeams. Each ladder frame 100 has a steel tray welded to its bottom, and the steel tray is filled with a removable concrete ballast block. The double-sided independent straight ladder 200 structure is the same as in Embodiment 1.

[0040] The tail end of the double-sided tiltable inclined ladder 300 is hinged to the top working platform 101 of the corresponding ladder frame 100 via a pin; the front end of the tiltable inclined ladder 300 is controlled by the steel wire rope 401 of the hand-cranked winch 400 to control the tilt angle; each side of the inclined ladder is equipped with a first guardrail 601 and a second guardrail 602. The tail end of the first guardrail 601 is hinged to the front end of the inclined ladder via a first hinge point a; the tail end of the second guardrail 602 is hinged to the middle of the inclined ladder via a second hinge point b, and the head end is hinged to the middle of the first guardrail 601 to form a third hinge point c; the free ends of the first guardrails 601 on both sides are connected by a telescopic protective link. The chain length is adjustable according to the wind turbine tower. The end is equipped with a hook lock. The protective chain crosses to form a closed-loop barrier to prevent personnel from falling from the side of the tower.

[0041] It should be noted that the first hinge point a, the second hinge point b, and the third hinge point c can all be fixed and disassembled by inserting pins into the holes on the side wall of the inclined ladder.

[0042] like Figure 4 The diagram shown in Embodiment 2 illustrates the working state of the embodiment. The working steps of this embodiment are as follows:

[0043] Step 1: Equipment positioning and fixing. The ladder frame 100 is vertically erected on one side of the wind turbine tower and fixed to the ground by the fixing ballast of the bottom steel tray. The bottom steel tray is pre-filled with concrete ballast. The operator climbs to the working platform 101 by the weight of the ballast. He grabs the flat steel on both sides, steps on the square steel footboard, and rises to the target working platform 101 layer by layer.

[0044] Step 2: Adjust the tilting ladder to fit the curved surface of the tower. After personnel reach the top platform, operate the hand winch 400 to release the steel wire rope 401, causing the front end of the tilting ladder 300 to slowly tilt downwards. Observe the contact status between the rubber shock absorber 500 at the front end of the ladder and the tower until they are completely in contact. Rotate the hand winch 400 and adjust the tilt angle of the tilting ladder 300 through the steel wire rope 401 to make it fit tightly against the curved surface of the tower. Unfold the guardrail 600, stretch the telescopic protective chain to connect the free ends of the first guardrails 601 on both sides, and lock the hooks to form a closed safe working area around the tower.

[0045] Step 3: Construction workers move up the tilting ladder to the top of the tower for painting. The work platform 101 can be connected to the ladder frame 100 with connecting bolts as needed to achieve multi-level setup and cover the entire circumferential area.

[0046] Step 4: After the work is completed, move the boarding ladder to the next work point using a forklift.

[0047] In summary, this patent, through a combination of symmetrical double-sided ladder distribution and dynamically adjustable tiltable ladders, completely solves the three major technical bottlenecks in wind turbine tower painting operations:

[0048] To address the limitations of the work coverage area, an innovative layout is adopted that extends the double-sided ladders towards the center of the tower. Combined with the tilt angle adjustment of the top tiltable ladder, the front end of the ladder completely covers the top area of ​​the tower. At the same time, a closed-loop work area is formed by the retractable protective chain between the double-sided guardrails, enabling full-circumferential painting without displacement.

[0049] Overcoming the challenge of curved surface fitting, the inclined ladder utilizes a dual-degree-of-freedom structure with a hinged pin at the tail end and a steel wire rope at the front end, enabling it to adapt to the curvature of towers with different diameters. Combined with the rubber shock absorber buffer at the bottom of the channel steel guardrail and the flexible laying of the steel mesh channel, it ensures that the ladder body and the tower wall fit together tightly without gaps throughout the entire process, eliminating the risk of rigid collisions.

[0050] To eliminate the risk of instability at heights, concrete ballast blocks weighing ≥500kg are installed at the bottom of the ladder frame, and a torsional frame is formed by rigid connection of the bottom crossbeams of the double-sided ladder frame; when the inclined ladder tilts, the steel wire rope continuously provides downward tension;

[0051] The high-altitude safety protection has been reconstructed by designing guardrails combined with double-sided retractable protective chains to form a 100% closed-loop enclosure. With the addition of a pin-type quick-release design, it achieves full coverage of safety protection and efficient transportation along the work path.

[0052] This results in a four-in-one solution that provides full circumferential coverage, dynamic fit, wind resistance and load stability, and inherent safety, thereby improving painting efficiency, greatly reducing the accident rate, and redefining the safety boundaries of high-altitude wind power operations.

[0053] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

Claims

1. A ladder for spray painting wind turbine towers, characterized in that, include: A ladder frame is a vertical frame structure welded from steel, with platforms spaced at intervals between the upper and lower sections within the vertical frame structure. A straight ladder connects to the opening of each work platform and forms a vertical passage between two adjacent work platforms; A tilting ladder, the end of which is hinged to the working platform at the top of the ladder frame via a connecting pin; A hand-cranked winch connected to the top of the ladder frame via a steel wire rope can tilt the inclined ladder; the steel wire rope can be extended or retracted to adjust the tilt angle.

2. The ladder for painting wind turbine towers according to claim 1, characterized in that: The bottom of the ladder frame is welded with a steel tray, and the steel tray has a built-in fixed ballast.

3. The ladder for painting wind turbine towers according to claim 1 or 2, characterized in that: There are two ladder frames, symmetrically distributed on both sides of the wind turbine tower. Each ladder frame has a tilting inclined ladder with a guardrail hinged to it, and the two guardrails are connected by a guard chain.

4. The ladder for painting wind turbine towers according to claim 3, characterized in that: The guardrail includes a first guardrail and a second guardrail, wherein the tail end of the first guardrail is hinged to the front end of the tiltable inclined ladder through a first hinge point; The tail end of the second guardrail is hinged to the middle of the tilting ladder via a second hinge point, and its head end is hinged to the middle of the first guardrail via a third hinge point.

5. The ladder for painting wind turbine towers according to claim 4, characterized in that, The tiltable inclined ladder includes: symmetrically arranged channel steel guardrails on both sides; Steel mesh channel laid between the channel steel guardrails on both sides; Shock absorbers installed at the bottom front end of the channel steel guardrail.

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