Ladder structure for wind turbine

Abstract

The utility model relates to a kind of ladder structure for wind-driven generator, vertical ladder is arranged along the generatrix of tower cylinder outer circle surface, annular channel is arranged along the circumferential surface of tower cylinder outer circle surface, the bottom of the vertical ladder is equipped with flexible link part, the flexible link part includes: connecting chain, is connected with vertical ladder, step stick, is connected between two side connecting chains, positioning ring, is located at the end of connecting chain away from vertical ladder;The positioning ring is open piece, the both ends of the open mouth of the positioning ring are connected with the connecting chain, and form the flexible ladder assembly of bottom end closure. The ladder frame of flexible ladder bottom at least includes a section of connecting chain. In the ladder frame of flexible ladder bottom, connecting chain is symmetrically arranged in ladder frame two sides, and the same degree of deformation is provided.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine components, and in particular to a ladder structure for wind turbines. Background Technology

[0002] Wind turbines come in two types: onshore and offshore. Onshore wind turbines typically have ladders installed along the inner walls inside the tower, allowing access via elevators or a combination of elevators and manual climbing. Offshore wind turbines, however, require workers to first climb from the ship to the outer ladders at the base of the tower before using the bottom ladders to enter the tower.

[0003] This bottom ladder consists of a vertical ladder running along the tower's main axis and a circular walkway encircling the tower. Workers approach the bottom of the vertical ladder by boat, climb the ladder, and then enter the tower through the circular walkway.

[0004] Currently, climbing from the boat to the vertical ladder requires bringing the boat close to the bottom of the tower, and then having workers jump onto the ladder at the right moment. At this time, the workers are not yet properly secured with safety ropes, making this climbing method highly dangerous, especially in large waves, where personal safety is difficult to guarantee. Utility Model Content

[0005] In response to the shortcomings of the existing production technology, the applicant provides a ladder structure for wind turbines, which is particularly suitable for the vertical ladder at the bottom of offshore wind turbine towers. This facilitates ladder climbing and operation for workers, is compatible with various water transport vehicles, and reduces the difficulty and danger of climbing for workers.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A ladder structure for a wind turbine includes a vertical ladder installed along the generatrix of the outer circumference of the tower, and an annular channel installed along the circumference of the outer circumference of the tower.

[0008] The bottom of the vertical ladder is provided with a flexible connecting part, the flexible connecting part including:

[0009] Connecting chain, which connects to the vertical ladder.

[0010] The foot pedal connects the two connecting chains.

[0011] A positioning ring is located at the end of the connecting chain away from the vertical ladder; the positioning ring is an open piece, and the two ends of the open part of the positioning ring are connected to the connecting chain to form a flexible ladder assembly with a closed bottom.

[0012] As a further improvement to the above technical solution:

[0013] The bottom frame of the flexible ladder includes at least one connecting chain.

[0014] In the bottom frame of the flexible ladder, connecting chains are symmetrically arranged on both sides of the frame to provide the same degree of deformation.

[0015] The positioning ring is a semi-circular ring or a semi-frame component.

[0016] The inner wall of the positioning ring is formed with positioning recesses.

[0017] The inner wall of the positioning recess is arc-shaped, and the positioning recess extends circumferentially to both radial sides of the positioning ring.

[0018] The positioning ring is fitted with a secondary positioning ring, and the secondary positioning ring and the positioning ring are connected by a chain or rope.

[0019] The positioning ring and the secondary positioning ring are rubber-coated parts.

[0020] A protective cage is installed between the vertical ladder and the annular passage. The side of the protective cage near the flexible connection part is set with a conical opening, and the large end of the cone faces the flexible connection part.

[0021] Suitable for offshore wind power generation equipment.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention improves upon the conventional ladder section of an offshore wind turbine. Conventional ladders require a person to stand at the bow of the vessel and adjust their jump timing according to the waves, which is highly risky. This application adds a flexible ladder section to the bottom of the rigid ladder. When climbing is needed, the flexible ladder is first hooked from the ladder to the vessel, and a positioning ring is used to secure it to a structure at the bow, such as a bollard. Workers then climb from the flexible ladder to the ladder, significantly improving safety.

[0024] This application also provides two specifications of positioning rings. The positioning rings are larger in size, equal to the width of a ladder frame, making it more likely to fit onto the bollards. Furthermore, a secondary positioning ring is embedded on the positioning ring. By fitting the secondary positioning ring onto other bow structures, the relative position of the flexible connection can be further positioned, further reducing the movement of the flexible connection and ensuring the safety of the personnel.

[0025] The positioning recesses on the inner wall of the positioning ring are mainly designed to work with the bollards when the positioning ring is thrown onto the deck and fitted with bollards, reducing the probability of the positioning ring shifting. Attached Figure Description

[0026] Figure 1 This is the main view of the ladder structure in this application.

[0027] Figure 2 This is a three-dimensional view of the ladder structure of this application.

[0028] Figure 3 This is a schematic diagram of one embodiment of the positioning ring in this application.

[0029] Figure 4 This is a schematic diagram of another implementation of the positioning ring in this application.

[0030] The components include: 1. Tower; 2. Vertical ladder; 3. Circular passage; 4. Flexible connection; 5. Protective cage.

[0031] 401. Connecting chain; 402. Step bar; 403. Positioning ring; 404. Positioning recess; 405. Secondary positioning ring; 501. Conical opening. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0033] like Figures 1-4 As shown, in this embodiment, the wind turbine ladder structure includes a vertical ladder 2 along the generatrix of the outer surface of the tower 1, and an annular channel 3 along the circumference of the outer surface of the tower 1.

[0034] The bottom of the vertical ladder 2 is provided with a flexible connecting part 4, which includes:

[0035] Connecting chain 401 is connected to vertical ladder 2.

[0036] The foot pedal 402 is connected between the two connecting chains 401.

[0037] The positioning ring 403 is located at the end of the connecting chain 401 away from the vertical ladder 2. The positioning ring 403 is an open part, and the two ends of the open part of the positioning ring 403 are connected to the connecting chain 401 to form a flexible ladder assembly with a closed bottom.

[0038] The bottom frame of the flexible ladder includes at least one connecting chain 401.

[0039] In the ladder frame at the bottom of the flexible ladder, connecting chains 401 are symmetrically arranged on both sides of the ladder frame to provide the same degree of deformation.

[0040] The positioning ring 403 adopts a semi-circular ring or a semi-frame component.

[0041] The inner wall of the positioning ring 403 is formed with a positioning recess 404.

[0042] The inner wall of the positioning recess 404 is arc-shaped, and the positioning recess 404 extends circumferentially to both radial sides of the positioning ring 403.

[0043] A secondary positioning ring 405 is fitted onto the positioning ring 403, and the secondary positioning ring 405 and the positioning ring 403 are connected by a chain or rope.

[0044] Positioning ring 403 and secondary positioning ring 405 are rubber-coated parts.

[0045] A protective cage 5 is provided between the vertical ladder 2 and the annular passage 3. The protective cage 5 is provided with a conical opening 501 on the side near the flexible connection part 4, with the large end of the cone facing the flexible connection part 4.

[0046] Suitable for offshore wind power generation equipment.

[0047] The specific structure and working principle of this application are as follows:

[0048] The ladder structure provided in this application is particularly suitable for use at the bottom vertical ladder 2 of an offshore wind turbine. Addressing the issue of the difficulty for shipboard personnel to climb the vertical ladder 2, this application provides a ladder with a flexible connecting part 4 at the bottom, which can be attached to the deck when the ship approaches the tower, cooperating with structures on the deck such as bollards, making it easier for personnel to safely reach the ladder from the ship.

[0049] like Figure 1 and Figure 2 As shown, taking an offshore wind turbine as an example, a vertical ladder 2 and a ring passage 3 are provided at the bottom of the tower. The vertical ladder 2 is set along the outer wall of the tower and parallel to the axis of the tower. Workers climb up the vertical ladder 2 to the ring passage 3 and then enter the tower through the ring passage 3.

[0050] like Figure 2 As shown, at the bottom of the two ladder bars of the vertical ladder 2, two connecting chains 401 are connected respectively, and multiple steps are arranged between the connecting chains 401. These steps on the connecting chains 401 form a flexible connection part 4 with the connecting chains 401.

[0051] The bottommost ladder frame of the flexible connection section 4 consists of a semi-enclosed open positioning ring 403, two connecting chains 401, and a step bar. The reason why the bottommost ladder frame must have a connecting chain 401 is that if the last ladder frame were made into a rigid, closed ladder frame, the entire structure would be a rigid closed loop. During throwing, its deformation capacity would be weak, resulting in a higher risk factor. Especially after the ladder frame has already secured the ship's structure, the ship will still be affected by waves and rise and fall. At this point, the rigid impact between the ladder frame and the bollard is significant, posing a high risk. Designing the ladder frame as flexible can reduce the risk of rigid impact.

[0052] like Figure 3 As shown, this is an optional structure of the positioning ring 403 of this application. It adopts a semi-rectangular structure. The two ends of the positioning ring 403 are connected to the connecting chain 401. A positioning recess 404 is opened on the inner wall of the positioning ring 403. When the positioning ring 403 moves, the positioning recess 404 touches the bollard, which can serve as a temporary positioning structure to reduce the speed of the positioning ring 403 moving.

[0053] like Figure 4 As shown, this is another optional structure of the positioning ring 403 in this application, compared to... Figure 3 A structure with an inner vertex angle, Figure 4 The circular arc structure in the middle has a lower probability of generating rigid impact with the cable pile.

[0054] In all embodiments, a secondary positioning ring 405 is also embedded in the positioning ring 403. After the positioning ring 403 is initially limited, the secondary positioning ring 405 can be removed from the positioning ring 403 and sleeved on other structures to apply limiting forces in at least two directions to the flexible connecting section, thereby further achieving the limiting effect.

[0055] Both the secondary positioning ring 405 and the positioning ring 403 have an adhesive layer. Therefore, theoretically, as long as a space is made in the positioning ring 403 to accommodate the secondary positioning ring 405, temporary positioning and storage can be achieved through the deformation of the adhesive layer when pressing and storing.

[0056] 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 ladder structure for a wind turbine generator, characterized in that: A vertical ladder (2) is provided along the generatrix of the outer circular surface of the tower (1), and an annular channel (3) is provided along the circumference of the outer circular surface of the tower (1). The bottom of the vertical ladder (2) is provided with a flexible connecting part (4), the flexible connecting part (4) includes: Connecting chain (401), connected to vertical ladder (2), The foot pedal (402) is connected between the two connecting chains (401). The positioning ring (403) is located at the end of the connecting chain (401) away from the vertical ladder (2); the positioning ring (403) is an open part, and the two ends of the open part of the positioning ring (403) are connected to the connecting chain (401) to form a flexible ladder assembly with a closed bottom.

2. The ladder structure for wind turbine generators as described in claim 1, characterized in that: The bottom frame of the flexible ladder includes at least one connecting chain (401).

3. The ladder structure for wind turbine generators as described in claim 2, characterized in that: In the bottom frame of the flexible ladder, connecting chains (401) are symmetrically arranged on both sides of the frame to provide the same degree of deformation.

4. The ladder structure for wind turbine generators as described in claim 1, characterized in that: The positioning ring (403) is a semi-circular ring or a semi-frame component.

5. The ladder structure for wind turbine generators as described in claim 4, characterized in that: The inner wall of the positioning ring (403) is formed with a positioning recess (404).

6. The ladder structure for wind turbine generators as described in claim 5, characterized in that: The inner wall of the positioning recess (404) is arc-shaped, and the positioning recess (404) extends circumferentially to both radial sides of the positioning ring (403).

7. The ladder structure for wind turbine generators as described in claim 1, characterized in that: The positioning ring (403) is fitted with a secondary positioning ring (405), and the secondary positioning ring (405) is connected to the positioning ring (403) by a chain or rope.

8. The ladder structure for wind turbine generators as described in claim 7, characterized in that: The positioning ring (403) and the secondary positioning ring (405) are rubber-coated parts.

9. The ladder structure for a wind turbine generator as described in claim 1, characterized in that: A protective cage (5) is provided between the vertical ladder (2) and the annular channel (3). The protective cage (5) is provided with a conical opening (501) on the side near the flexible connection part (4), with the large end of the cone facing the flexible connection part (4).

10. The ladder structure for a wind turbine generator as described in any one of claims 1-9, characterized in that: Suitable for offshore wind power generation equipment.

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