Cover plate equipment for hoisting hole of fan tower drum

Abstract

The utility model provides fan tower drum hoisting hole cover plate equipment which comprises a hoisting hole, a cover plate is connected to the upper portion of the hoisting hole through a hinge, the cover plate is connected with a driving motor, a fence is arranged on the outer side of the hoisting hole, an inductive switch is installed on the fence, and the inductive switch is in signal connection with the driving motor. The inductive switch sends a signal to the driving motor and issues a cover plate opening instruction, when a hoisted object and a hoisting chain of the small crane ascend, the hoisted object and the hoisting chain all pass through the inductive switch, the inductive switch sends a signal to the driving motor to close the cover plate, the operation difficulty of the hoisting hole cover plate is reduced, and the safety of the high-altitude hoisted object is improved.

Description

Technical Field

[0001] This application relates to the field of lifting holes, and more particularly to a lifting hole cover plate device for wind turbine towers. Background Technology

[0002] The wind turbine tower is a crucial component of a wind turbine generator set, serving as the primary structure supporting the wind turbine and blades. Typically constructed of steel or concrete, the tower possesses high strength and stability to withstand various forces encountered by the wind turbine during operation, such as wind force, gravity, and inertial forces. The hoisting hole covers on the wind turbine tower are safety devices installed on various platforms inside the tower. Their primary function is to cover and seal the hoisting holes on the platforms to prevent accidental falls of objects or personnel. Specifically, during hoisting operations, the hoisting hole covers can be removed or opened to provide a passage for items; after the operation is complete, the covers can be replaced to re-cover the hoisting holes.

[0003] Generally, the shape and size of the hoisting hole cover are designed according to the hoisting hole on the tower platform, and are usually circular or square to accommodate different hoisting hole structures. The hoisting hole cover is typically connected to the platform by hinges, bolts, or other fixing devices for easy opening and closing. When the tower height is low, operators can directly observe the hoisting load passing through each tower platform from the ground or lower platform, allowing them to open or close the cover in a timely manner to ensure the safe passage of the load. However, with the increase in wind turbine power and the trend towards high-tower units, the tower height has significantly increased. This means that the hoisting load needs to pass through more tower platforms. At this point, operators on the ground or lower platform can no longer accurately see the hoisting load passing through each tower platform, making real-time monitoring of the load's status impossible. This significantly increases the risk of falling objects from height, increasing the difficulty and uncertainty of hoisting operations. Utility Model Content

[0004] This application provides a wind turbine tower lifting hole cover plate device to solve the technical problem that existing lifting hole cover plates can only be operated by visual observation. For taller wind turbine towers, it is impossible to observe the situation of each tower platform and monitor the status of the suspended object in real time, which significantly increases the risk of falling objects from heights and increases the difficulty and uncertainty of lifting operations.

[0005] In a first aspect, this application provides a wind turbine tower hoisting hole cover plate device, including a hoisting hole, a cover plate connected to the top of the hoisting hole by a hinge, a drive motor connected to the cover plate, a fence set outside the hoisting hole, an induction switch installed on the fence, and the induction switch being signal-connected to the drive motor.

[0006] Optionally, in the device described above, the drive motor is installed on one side of the lifting hole, and the drive motor is connected to the cover plate through a transmission mechanism. One end of the transmission mechanism is connected to the output shaft of the drive motor, and the other end is connected to the hinge of the cover plate.

[0007] Optionally, in the device described above, the outer ring of the cover is equipped with a cushioning device, which is an elastic washer or a gas spring.

[0008] Optionally, in the device described above, the inductive switch is a photoelectric sensor or an infrared sensor, and the inductive switch is installed on top of the fence.

[0009] Optionally, as described above, the wind turbine tower lifting hole cover plate device is also equipped with an automatic locking structure. The automatic locking structure includes a locking pin, a locking groove, a spring mechanism, and an electric push rod. The locking pin and the locking groove are fitted onto the cover plate. The locking pin is connected to the spring mechanism and the electric push rod. The electric push rod is connected to the inductive switch signal.

[0010] Optionally, in the device described above, a locking pin is mounted on the cover plate, and a locking groove that mates with the locking pin is mounted on the hanging hole.

[0011] Optionally, in the device described above, a status indicator light is installed on the cover plate, and the status indicator light is connected to the inductive switch signal.

[0012] Optionally, in the device described above, two or more inductive switches are installed on each layer of the wind turbine tower's fencing.

[0013] Optionally, the device described above has a protective netting installed on the fence.

[0014] Optionally, as described above, the wind turbine tower hoisting hole cover plate device is also equipped with an emergency manual operation device, which includes a manual operation lever installed on the platform where the hoisting hole is located. The manual operation lever is connected to the hinge of the cover plate through a mechanical linkage system.

[0015] The wind turbine tower hoisting hole cover device provided in this application includes a hoisting hole, a cover plate connected to the top of the hoisting hole by a hinge, a drive motor connected to the cover plate, a fence set outside the hoisting hole, and an induction switch installed on the fence. The induction switch is connected to the drive motor. When the hoisted object and the crane chain are lowered and pass through the induction switch, the induction switch sends a signal to the drive motor to issue a cover plate opening command. When the hoisted object and the crane chain are raised and pass through the induction switch, the induction switch sends a signal to the drive motor to close the cover plate, reducing the difficulty of operating the hoisting hole cover and improving the safety of hoisting objects at high altitudes. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] Figure 1 This is a structural schematic diagram of the wind turbine tower lifting hole cover plate equipment provided in this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Hanging hole; 2-Cover plate; 3-Fence; 4-Induction switch; 5-Drive motor.

[0020] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0021] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0022] Secondly, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Furthermore, it should be noted that in the description of this application, the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, 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 application, unless otherwise stated, "a plurality of" means two or more.

[0025] As the background technology demonstrates, with the increase in wind turbine power, high-tower turbines are becoming a trend, and the tower height is significantly increased. This means that loads need to pass through more tower platforms. When hoisting equipment or materials inside the wind turbine tower, the hoisting port covers need to be opened to allow the load to pass through each platform. Inside the high tower, operators on the ground or lower platforms can no longer accurately see the load passing through each tower platform, which increases the difficulty and uncertainty of hoisting operations.

[0026] To address the aforementioned technical problems, this application aims to propose a wind turbine tower hoisting hole cover device. By installing an induction switch on the hoisting hole enclosure, when the hoisted object and crane chain are lowered past the induction switch, the induction switch is connected to a drive motor to issue a cover opening command. When the hoisted object and crane chain are raised and have all passed the induction switch, a cover closing command is issued to close the cover, thereby reducing the difficulty of operating the hoisting hole cover and improving the safety of high-altitude hoisting.

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] To better understand the solutions of the embodiments of this application, an application scenario involved in the embodiments of this application will be introduced below.

[0029] Please see Figure 1 , Figure 1 This is a structural schematic diagram of the wind turbine tower lifting hole cover plate device provided in the embodiments of this application, as shown below. Figure 1 As shown, it includes a hanging hole 1, a cover plate 2 connected to the top of the hanging hole 1 by a hinge, a drive motor 5 connected to the cover plate 2, a fence 3 set outside the hanging hole 1, an induction switch 4 installed on the fence 3, and the induction switch 4 is connected to the drive motor 5 by a signal.

[0030] Specifically, the hoisting hole 1 is located at the center of the platform inside the wind turbine tower or other suitable location, for the passage of hoisted objects. The size and shape of the hole are designed according to actual needs, and are usually circular or square. A cover plate 2 covers the hoisting hole 1 to close the hole when not in use. The cover plate 2 is usually hinged to the platform for easy opening and closing. A fence 3 is installed around the hoisting hole 1, usually made of metal, with a certain height and strength, to protect the operating area.

[0031] Understandably, by installing a sensor switch 4 on the fence 3 of the hoisting opening 1 and connecting the signal of the sensor switch 4 to the drive motor 5, the automatic opening and closing of the cover plate 2 on the hoisting opening 1 can be achieved. When the hoisted object or the crane passes the sensor switch 4 on the fence 3, the sensor switch 4 will trigger the drive motor 5 to execute the corresponding operation command. This automated design reduces the complexity and time cost of manual operation and improves operational efficiency. After the hoisting operation is completed, the cover plate 2 can close in a timely and accurate manner to prevent objects or personnel from falling accidentally. This automatic closing mechanism reduces safety hazards caused by human negligence and improves the safety of the tower's interior.

[0032] Furthermore, since the inductive switch 4 can monitor the status of the suspended load and the crane chain in real time, it can issue commands to open or close the cover plate 2 according to the actual situation. This real-time monitoring and feedback mechanism ensures that the operation of the cover plate 2 of the lifting hole 1 is synchronized with the status of the suspended load, reducing uncertainty and risk in operation.

[0033] Specifically, the operation process of the wind turbine tower lifting hole 1 cover plate 2 equipment provided in this application includes the process of lowering the load and the process of raising the load.

[0034] During the lowering process, the suspended object and crane chain begin to descend, and the suspended object passes through the sensor switch 4 on the fence 3 of the suspended object hole 1; the sensor switch 4 detects the passage of the suspended object and crane chain and sends a signal to the drive motor 5; the drive motor 5 receives the opening command, starts and opens the cover plate 2; the suspended object passes through the suspended object hole 1 and enters the next platform.

[0035] During the lifting process, the load and crane chain begin to rise and pass through the sensor switch 4 on the fence 3 of the load lifting hole 1; the sensor switch 4 detects the passage of the load and crane chain and sends a signal to the drive motor 5; the drive motor 5 receives the closing command, starts and closes the cover plate 2; the cover plate 2 is closed, ensuring that the load lifting hole 1 is in a closed state when not in operation.

[0036] The wind turbine tower hoisting hole 1 cover plate 2 device provided in this application can effectively solve the technical problems of existing high tower hoisting hole 1 cover plates 2. This automated design improves the automation level and efficiency of operation, can adapt to the complex operating environment of high towers, enhances safety, reduces human error, and adapts to the complex operating requirements of high towers, thereby significantly improving the safety and reliability of hoisting operations.

[0037] In one possible implementation, the induction switch 4 is installed inside or on top of the fence 3 to ensure that the induction switch 4 is triggered when the load and crane chain pass through the load hole 1.

[0038] The inductive switch 4 can be a photoelectric sensor, an infrared sensor, or other suitable type, used to detect the passage of suspended objects and crane chains. The inductive switch 4 is connected to the control system of the drive motor 5 via cable or wireless signal.

[0039] Furthermore, this application can also utilize an intelligent induction switch 4, which possesses self-diagnostic and fault alarm functions. These functions can promptly detect and report faults in the induction switch 4, facilitating maintenance and improving system reliability. Moreover, the induction switch 4 can be wirelessly connected to the control system, reducing wiring complexity. This wireless connection reduces wiring complexity and maintenance costs, improving system flexibility and ease of installation.

[0040] The drive motor 5 can be a DC motor, a stepper motor, or a servo motor; the specific choice depends on the weight of the cover plate 2 and operational requirements. The drive motor 5 is installed beside the lifting hole 1 or below the platform and is connected to the cover plate 2 via a transmission mechanism (such as gears, chains, or belts). The drive motor 5 is signal-connected to the inductive switch 4; that is, the drive motor 5 is connected to the control system of the inductive switch 4, receives signals from the inductive switch 4, and performs the corresponding opening or closing operation of the cover plate 2.

[0041] The transmission mechanism connects the drive motor 5 and the cover plate 2, and is used to convert the rotational motion of the motor into the opening and closing action of the cover plate 2. Specifically, one end of the transmission mechanism is connected to the output shaft of the drive motor 5, and the other end is connected to the hinge or other fixed point of the cover plate 2. The transmission mechanism can be a gear drive, chain drive, or belt drive. The specific selection can be determined according to the design of the cover plate 2 and the operational requirements, and this application does not limit it.

[0042] Furthermore, the cover plate 2 can be made of lightweight, high-strength materials (such as carbon fiber composites). These materials reduce the weight of the cover plate 2, decrease the load on the motor, and improve the system's durability and reliability. Status indicator lights can also be installed on the cover plate 2 to display its open and closed status. These lights provide real-time visibility of the cover plate 2's status, allowing operators to monitor it remotely and improving operational transparency and safety.

[0043] Furthermore, a buffer device, such as a gas spring or shock absorber, can be added to the hinge or edge of the cover plate 2. The buffer device can slow down the opening and closing speed of the cover plate 2, prevent the impact and damage caused by the rapid movement of the cover plate 2, extend the service life of the cover plate 2 and the hinge, and reduce maintenance requirements.

[0044] It is understandable that different tower platforms may have different sizes of lifting holes 1, and adjustable cover plates 2 can be designed according to requirements to accommodate different sizes of lifting holes 1, thereby improving the versatility and flexibility of the system and reducing costs.

[0045] In one possible embodiment, multiple inductive switches 4 can be installed at different heights to accurately detect the position of the suspended object and the crane chain. The multi-layer inductive switches 4 can provide more accurate position information, ensuring that the cover 2 opens and closes at the correct time, thereby improving the accuracy and safety of the system.

[0046] Specifically, the induction switches 4 are installed inside the enclosure 3 of the hanging hole 1, and are evenly distributed from top to bottom. All induction switches 4 are connected to the central control system via cable or wireless signal.

[0047] Furthermore, a protective net can be added to fence 3 to prevent small objects from accidentally falling. The protective net can prevent small objects from accidentally falling, further improving the safety of the operating area.

[0048] In some operations, a fixed fence 3 may restrict the operating space or hinder the operation. In this application, an adjustable-height fence 3 can be designed. The fence 3 is installed around the hanging hole 1, and a slide rail or screw lifting mechanism is fixed to the platform, which improves the adaptability and safety of the fence 3 and meets different operating needs.

[0049] In one possible embodiment, an automatic locking mechanism can be added to the cover plate 2. When the cover plate 2 is closed, it automatically locks to prevent accidental opening. This prevents the cover plate 2 from being accidentally opened by wind or other external forces, ensuring that the lifting hole 1 remains closed when not in operation. This improves system safety and prevents accidental falls. The automatic locking structure includes a locking pin, a locking groove, a spring mechanism, and an electric push rod. The locking pin is installed on the cover plate 2 in conjunction with the locking groove. The locking pin connects to the spring mechanism and the electric push rod, which is signal-connected to the inductive switch 4.

[0050] Specifically, the locking pin is inserted into the locking slot when the cover plate 2 is closed to prevent the cover plate 2 from being accidentally opened. The locking pin can be cylindrical or square, with bevels or tips to facilitate insertion into the locking slot. The locking pin is installed on the edge of the cover plate 2 or near the hinge. The locking slot is used to receive the locking pin, ensuring that the cover plate 2 is securely locked in the closed state. The locking slot has a groove that matches the locking pin, and is usually circular or square. The locking slot can be installed on the edge of the hanging hole 1. Furthermore, when the cover plate 2 is a double-opening configuration on opposite sides, the locking slot can also be installed on the opposite side of the cover plate 2 where the locking pin is located.

[0051] The spring mechanism is used to push the locking pin back into the locking slot when the electromagnet or electric actuator is de-energized, thus achieving automatic locking. It can be a compression spring or a torsion spring. The spring mechanism is installed behind or to the side of the locking pin, providing the restoring force for the locking pin.

[0052] The electric push rod is used to push the locking pin out of the locking groove when energized, allowing the cover plate 2 to open. The electric push rod consists of a motor and a push rod, and is installed behind or to the side of the locking pin, connected to the locking pin. The electric push rod receives a signal from the inductive switch 4, and is connected to the locking pin via a mechanical linkage or directly to realize the opening and closing of the locking pin.

[0053] The specific application process of the automatic locking structure includes: after the cover plate 2 is closed, the locking pin is automatically inserted into the locking groove under the action of the spring, the cover plate 2 is locked, the electric push rod is in the de-energized state, and the locking pin remains in the locking groove.

[0054] The inductive switch 4 detects the movement of the suspended object or the crane chain and sends a signal to the electric push rod, which activates the electric push rod to pull the locking pin out of the locking slot or push it back. The cover plate 2 opens under the drive of the drive motor 5, allowing the suspended object to pass through.

[0055] After the load passes, the induction switch 4 detects the departure of the load or the crane chain and sends a signal to the electric push rod. The electric push rod loses power, and the locking pin is re-inserted into the locking groove under the action of the spring. The cover plate 2 closes under the drive of the drive motor 5 and is locked by the locking pin to ensure that the cover plate 2 will not be opened accidentally.

[0056] Understandably, the automatic locking structure, through the cooperation of a locking pin, locking groove, spring mechanism, and electric push rod, achieves automatic locking and unlocking of cover plate 2. This structure automatically locks when cover plate 2 is closed, preventing accidental opening and improving system safety and reliability. When cover plate 2 needs to be opened, the inductive switch 4 and control circuit work together to ensure the locking pin unlocks promptly, allowing cover plate 2 to be opened safely. This design significantly improves the safety and ease of operation of the wind turbine tower lifting hole 1 cover plate 2 system.

[0057] In one possible implementation, the wind turbine tower hoisting hole 1 cover plate 2 device provided in this application also includes an emergency manual operation device, which allows the cover plate 2 to be manually opened or closed in the event of an automatic system failure. This ensures safe operation even in the event of an automatic system failure and prevents accidents. It improves the safety and reliability of the system and provides emergency operation means. The emergency manual operation device includes a manual operating lever mounted on the platform where the hoisting hole 1 is located, and the manual operating lever is connected to the cover plate 2 via a mechanical linkage system and a hinge.

[0058] Specifically, the manual operating lever is used to manually open or close cover 2 in case of automatic system failure. The manual operating lever is rod-shaped with a handle for easy gripping and operation by the operator. The manual operating lever is installed next to the lifting hole 1 or in an easily accessible position on the platform.

[0059] The mechanical linkage system transmits the movement of the manual operating lever to the hinge or locking mechanism of the cover plate 2, thereby opening or closing the cover plate 2. The mechanical linkage system includes multiple links, hinges, and connectors, forming a mechanical transmission system that connects the manual operating lever and the hinge or locking mechanism of the cover plate 2.

[0060] Furthermore, a separate manual locking mechanism can be provided, distinct from the automatic locking mechanism. The manual locking mechanism is used to lock or unlock the cover 2 during manual operation, ensuring that the cover 2 does not move accidentally during manual operation. It includes a manual locking pin and locking groove, similar to the automatic locking mechanism, but controlled by a manual operating lever, and is installed at the hinge or edge of the cover 2.

[0061] When the automatic system is working normally, the manual operating lever and mechanical linkage system are in a stationary state, and the automatic locking mechanism controls the locking of the cover plate 2. When the automatic system malfunctions, the operator can release the automatic locking structure or manual locking mechanism by holding the manual operating lever and pushing or pulling the manual operating lever in a specified direction. The mechanical linkage system transmits the movement of the manual operating lever to the hinge or locking mechanism of the cover plate 2, thereby opening or closing the cover plate 2.

[0062] The emergency manual operation device enables safe operation in case of automatic system failure. The manual operating lever and mechanical linkage system transmit the operator's manual operation to the hinge or locking mechanism of the cover plate 2, ensuring that the cover plate 2 can be safely opened or closed in an emergency and preventing accidents.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0065] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A wind turbine tower lifting hole cover plate device, characterized in that, The device includes a lifting hole, a cover plate connected to the top of the lifting hole via a hinge, a drive motor connected to the cover plate, a fence installed outside the lifting hole, and an induction switch installed on the fence, the induction switch being signal-connected to the drive motor.

2. The device according to claim 1, characterized in that, The drive motor is installed on one side of the lifting hole. The drive motor is connected to the cover plate through a transmission mechanism. One end of the transmission mechanism is connected to the output shaft of the drive motor, and the other end is connected to the hinge of the cover plate.

3. The device according to claim 1, characterized in that, The outer ring of the cover plate is equipped with a buffer device, which is an elastic washer or a gas spring.

4. The device according to claim 1, characterized in that, The inductive switch is a photoelectric sensor or an infrared sensor, and the inductive switch is installed on the top of the fence.

5. The device according to claim 1, characterized in that, The wind turbine tower lifting hole cover plate device is also equipped with an automatic locking structure, which includes a locking pin, a locking groove, a spring mechanism and an electric push rod. The locking pin is installed on the cover plate in cooperation with the locking groove. The locking pin connects the spring mechanism and the electric push rod. The electric push rod is connected to the inductive switch signal.

6. The device according to claim 5, characterized in that, The locking pin is installed on the cover plate, and the locking groove that cooperates with the locking pin is installed on the hanging hole.

7. The device according to any one of claims 5 or 6, characterized in that, A status indicator light is installed on the cover plate, and the status indicator light is connected to the inductive switch signal.

8. The device according to any one of claims 1 to 6, characterized in that, Two or more of the aforementioned inductive switches are installed on each layer of the fence of the wind turbine tower.

9. The device according to any one of claims 1 to 6, characterized in that, The fence is equipped with a protective net.

10. The device according to any one of claims 1 to 6, characterized in that, The wind turbine tower lifting hole cover plate equipment is also equipped with an emergency manual operation device, which includes a manual operation lever set on the platform where the lifting hole is located. The manual operation lever is connected to the hinge of the cover plate through a mechanical linkage system.

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