A redundant control device for a single-blade lifting device

Abstract

This utility model discloses a redundant control device for a single-blade lifting device, relating to the field of wind power lifting technology. It includes a power supply unit, a control unit, and a disengagement mechanism. The power supply unit comprises a protection module, a conversion module, and a power source. The power source provides power, and the conversion module is connected to the power source. The conversion module converts the power source and outputs the converted power. The protection module provides short-circuit and overload protection for the conversion module and the power source. The control unit is connected to the conversion module, receives the converted power source, and outputs a control signal. The disengagement mechanism is connected to the control unit, receives the control signal, and performs the disengagement operation. This utility model adds a new control loop to the original control circuit, directly connecting to the nacelle power source and directly to the disengagement mechanism, allowing for independent control of the disengagement mechanism's disengagement.

Description

Technical Field

[0001] This utility model relates to the field of wind power hoisting technology, and in particular to a redundant control device for a single-blade hoisting tool. Background Technology

[0002] With the booming development of the wind power industry, single-blade lifting devices have become the main equipment for blade installation due to the widespread application of high-power generators. These devices are equipped with four electrically operated release mechanisms. In normal use, the lifting device is suspended above the blade, and the lifting straps are threaded through these four electric release mechanisms. The straps lift the blade, and a crane is used to hoist the single blade to a height for installation on the hub. After the blade is installed, the control system on the lifting device controls the release mechanism on one side to release the straps. Once the straps detach, the lifting device can detach from the blade, completing the installation of a single blade. However, in practical applications, issues such as generator shutdown, battery depletion, circuit breaker tripping, and short circuits in external components have repeatedly caused the release mechanism to malfunction. If a common problem of unhooking occurs, the following solutions exist: ① Remove the high-strength fixing bolts of the single blade and lower the entire unit to troubleshoot the problem. However, this requires replacing all the high-strength fixing bolts, resulting in direct losses exceeding 200,000 yuan. ② Rent a crane or helicopter to transport personnel to the lifting device in a basket for inspection. This would delay the project by at least 3 days and incur direct costs of 50,000 to 100,000 yuan. ③ Have workers walk from the nacelle through the blades onto the lifting device to troubleshoot the problem. This method carries significant safety risks and can only be performed in low wind conditions. In summary, existing solutions for single-blade lifting devices that experience unhooking mechanism failures are time-consuming, costly, and pose significant safety risks to personnel. Therefore, there is an urgent need for a redundant control device for single-blade lifting devices that can directly control the operation of the unhooker independently of the original control system, in order to solve the above-mentioned technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a redundant control device for a single-blade lifting device to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A redundant control device for a single-blade lifting device includes, A power supply unit includes a protection module, a conversion module, and a power supply. The power supply provides power, the conversion module is connected to the power supply, the conversion module converts the power supply and outputs the converted power supply, and the protection module provides short-circuit and overload protection for the conversion module and the power supply. A control unit is connected to the conversion module. The control unit receives the power converted by the conversion module and outputs a control signal. The unhooking mechanism is connected to the control unit. The unhooking mechanism receives the control signal and performs the unhooking operation.

[0005] Furthermore, the power source is an AC220V power source located in the nacelle of the wind turbine.

[0006] Furthermore, the conversion module is an AC / DC conversion module G1, which is used to convert the AC220V power supply to a DC24V power supply.

[0007] Furthermore, the control unit comprises circuit one, circuit two, circuit three, and a heating element connected in parallel. Circuit one includes control contactors KM1 and KM2 connected in parallel, and a selector switch SA1 connected to control contactors KM1 and KM2. Circuit two includes control contactors KM3 and KM4 connected in parallel, and a selector switch SA2 connected to control contactors KM3 and KM4. Circuit three includes control contactors KM5 and KM6 connected, and a selector switch SA3 connected to control contactors KM5 and KM6. Circuit four includes control contactors KM7 and KM8 connected, and a selector switch SA4 connected to control contactors KM7 and KM8.

[0008] Furthermore, the unhooking mechanism includes an electric unhooking device A1 connected to the control contactors KM1 and KM2 via an aviation connector, an electric unhooking device A2 connected to the control contactors KM3 and KM4 via an aviation connector, an electric unhooking device A3 connected to the control contactors KM5 and KM6 via an aviation connector, and an electric unhooking device A4 connected to the control contactors KM7 and KM8 via an aviation connector. A pin-shaft motor M1 is installed between the control contactors KM1 and KM2 and the electric unhooking device A1; a pin-shaft motor M2 is installed between the control contactors KM3 and KM4 and the electric unhooking device A2; a pin-shaft motor M3 is installed between the control contactors KM5 and KM6 and the electric unhooking device A3; and a pin-shaft motor M4 is installed between the control contactors KM7 and KM8 and the electric unhooking device A4.

[0009] Furthermore, the protection module includes an indicator light H1 connected in parallel with the control contactors KM1, KM2, KM3, KM4, KM5, KM6, KM7, and KM8.

[0010] The present invention discloses the following technical effects: The present invention discloses a redundant control device for a single-blade lifting device, which adds a new control loop to the original control circuit, directly connected to the power supply in the nacelle and directly connected to the unhooking mechanism, and independently controls the unhooking of the unhooking mechanism. When the main control system fails and cannot operate, the unhooking mechanism can be controlled to unhook through the control loop set in this application, so that the single-blade lifting device and the blade can be separated. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This utility model discloses a schematic diagram of a redundant control device for a single-blade lifting tool. Figure 2 : Schematic diagram of the power supply, conversion module and control unit of this utility model; Figure 3 : Schematic diagram of the connection between the control circuit and the pin-shaft motor of this utility model; Figure 4 : Schematic diagram of the redundant control loop of this utility model; Specifically, 1. Cable reel; 2. Single-blade lifting device. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] The specific implementation method is as follows: like Figures 1-4 As shown; this utility model discloses a redundant control device for a single-blade lifting device, comprising, The power supply unit includes a protection module, a conversion module, and a power supply. The power supply provides power, the conversion module is connected to the power supply, the conversion module converts the power supply and outputs the converted power supply, and the protection module provides short-circuit and overload protection for the conversion module and the power supply. The control unit is connected to the conversion module. The control unit receives the power converted by the conversion module and outputs control signals. The unhooking mechanism is connected to the control unit. It receives control signals and performs the unhooking operation.

[0016] In this embodiment, the power source is the AC220V power supply in the nacelle of the wind turbine.

[0017] In this embodiment, the conversion module is an AC / DC conversion module G1, which is used to convert AC220V power supply to DC24V power supply.

[0018] In this embodiment, the control unit consists of three circuits connected in parallel: Circuit 1, Circuit 2, Circuit 3, and the heating element. Circuit 1 includes control contactors KM1 and KM2 connected in parallel, and a selector switch SA1 connected to control contactors KM1 and KM2. Circuit 2 includes control contactors KM3 and KM4 connected in parallel, and a selector switch SA2 connected to control contactors KM3 and KM4. Circuit 3 includes control contactors KM5 and KM6, and a selector switch SA3 connected to control contactors KM5 and KM6. Circuit 4 includes control contactors KM7 and KM8, and a selector switch SA4 connected to control contactors KM7 and KM8.

[0019] In this embodiment, the unhooking mechanism includes an electric unhooking device A1 connected to control contactors KM1 and KM2 via an aviation connector, an electric unhooking device A2 connected to control contactors KM3 and KM4 via an aviation connector, an electric unhooking device A3 connected to control contactors KM5 and KM6 via an aviation connector, and an electric unhooking device A4 connected to control contactors KM7 and KM8 via an aviation connector. A pin-shaft motor M1 is installed between control contactors KM1 and KM2 and the electric unhooking device A1; a pin-shaft motor M2 is installed between control contactors KM3 and KM4 and the electric unhooking device A2; a pin-shaft motor M3 is installed between control contactors KM5 and KM6 and the electric unhooking device A3; and a pin-shaft motor M4 is installed between control contactors KM7 and KM8 and the electric unhooking device A4.

[0020] In this embodiment, the protection module includes an indicator light H1 connected in parallel with control contactors KM1, KM2, KM3, KM4, KM5, KM6, KM7, and KM8.

[0021] Specifically, such as Figure 1 As shown, cable reel 1 is fixed to the top of single-blade lifting device 2. A cable is wound around cable reel 1. When lifting the blade on the ground using single-blade lifting device 2, one end of the cable is pulled out and fixed to the root of the single blade. When the blade is lifted to the hub, the end of the cable fixed to the root of the single blade is fixed inside the nacelle. Figure 2 As shown, the AC220V power supply in the cabin is converted to DC24V power supply via AC / DC converter module G1, which supplies selector switches SA1-SA4 and control contactors KM1-KM8, such as... Figure 3 As shown, redundant control circuits are connected to electric unhookers A1-A4 located on the lifting device via a reel cable through aviation connector XP1. Each electric unhooker is controlled by an independent circuit, enabling individual control of electric unhookers A1-A4. A pin-shaft motor M1 is installed between control contactors KM1 and KM2 and electric unhooker A1; a pin-shaft motor M2 is installed between control contactors KM3 and KM4 and electric unhooker A2; and a pin-shaft motor M2 is installed between control contactor KM5 and KM4. A pin-shaft motor M3 is installed between control contactor KM6 and electric unhooking device A3, and a pin-shaft motor M4 is installed between control contactors KM7 and KM8 and electric unhooking device A4. Specifically, pin-shaft motor M1 is an inner-point pin-shaft motor, pin-shaft motor M2 is an outer-point pin-shaft motor, pin-shaft motor M3 is an inner-root pin-shaft motor, and pin-shaft motor M4 is an outer-root pin-shaft motor. Pin-shaft motors M1-M4 control the corresponding electric unhooking devices A1-A4 to achieve the unhooking operation. Figure 4 As shown, selector switch SA1 controls the engagement of KM1 and KM2, thus controlling electric decoy A1; selector switch SA2 controls the engagement of KM3 and KM4, thus controlling electric decoy A2; selector switch SA3 controls the engagement of KM5 and KM6, thus controlling electric decoy A3; and selector switch SA4 controls the engagement of KM7 and KM8, thus controlling electric decoy A4. This directly supplies DC24V power to the pin-shaft motors M1-M4, thereby controlling the decoy mechanisms A1-A4. The presence of short circuits and overloads in the motors can be determined by observing the power indicator light H1. The AC / DC conversion module G1 is protected against short circuits and overloads. When the AC220V power in the engine compartment is converted to DC24V by G1 and indicator light H1 is lit, the circuit is normal. If a short circuit or overload occurs in any branch, G1 automatically cuts off the output to prevent the fault from escalating, and indicator light H1 goes out.

[0022] In this invention, the new control circuit, when the control system of the single-blade lifting device fails to function properly, directly controls the unhooking mechanism via a power supply from the external nacelle through a power conversion module, thereby detaching the lifting device from the blade and completing the lifting operation.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0024] In the description of this utility model, it should also be noted that, 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; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A redundant control device for a single-blade lifting device, characterized in that, include, A power supply unit includes a protection module, a conversion module, and a power supply. The power supply provides power, the conversion module is connected to the power supply, the conversion module converts the power supply and outputs the converted power supply, and the protection module provides short-circuit and overload protection for the conversion module and the power supply. A control unit is connected to the conversion module. The control unit receives the power converted by the conversion module and outputs a control signal. The unhooking mechanism is connected to the control unit. The unhooking mechanism receives the control signal and performs the unhooking operation.

2. The redundant control device for a single-blade lifting device according to claim 1, characterized in that, The power source is the AC220V power supply in the nacelle of the wind turbine.

3. A redundant control device for a single-blade lifting device according to claim 2, characterized in that, The conversion module is an AC / DC conversion module G1, which is used to convert the AC220V power supply to a DC24V power supply.

4. A redundant control device for a single-blade lifting device according to claim 3, characterized in that, The control unit comprises three circuits connected in parallel: Circuit 1, Circuit 2, Circuit 3, and the heating element. Circuit 1 includes control contactors KM1 and KM2 connected in parallel, and a selector switch SA1 connected to the control contactors KM1 and KM2. Circuit 2 includes control contactors KM3 and KM4 connected in parallel, and a selector switch SA2 connected to the control contactors KM3 and KM4. Circuit 3 includes control contactors KM5 and KM6 connected, and a selector switch SA3 connected to the control contactors KM5 and KM6. Circuit 4 includes control contactors KM7 and KM8 connected, and a selector switch SA4 connected to the control contactors KM7 and KM8.

5. A redundant control device for a single-blade lifting device according to claim 4, characterized in that, The unhooking mechanism includes an electric unhooking device A1 connected to the control contactors KM1 and KM2 via an aviation connector, an electric unhooking device A2 connected to the control contactors KM3 and KM4 via an aviation connector, an electric unhooking device A3 connected to the control contactors KM5 and KM6 via an aviation connector, and an electric unhooking device A4 connected to the control contactors KM7 and KM8 via an aviation connector. A pin-shaft motor M1 is installed between the control contactors KM1 and KM2 and the electric unhooking device A1; a pin-shaft motor M2 is installed between the control contactors KM3 and KM4 and the electric unhooking device A2; a pin-shaft motor M3 is installed between the control contactors KM5 and KM6 and the electric unhooking device A3; and a pin-shaft motor M4 is installed between the control contactors KM7 and KM8 and the electric unhooking device A4.

6. A redundant control device for a single-blade lifting device according to claim 5, characterized in that, The protection module includes an indicator light H1 connected in parallel with the control contactors KM1, KM2, KM3, KM4, KM5, KM6, KM7, and KM8.

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