A gantry crane power cable winding fault detection device

Abstract

The utility model relates to a kind of gantry crane power supply cable winding fault detection device, involve crane technical field, including trolley, trolley side is equipped with electric reel support, cable reel is set on electric reel support, the circumferential of cable reel is wound with cable, the end of cable away from cable reel is connected power supply box, electric reel support is equipped with rotary encoder, rotary encoder rotating shaft is connected with cable reel by elastic coupling, rotary encoder output pulse signal to PLC controller, PLC controller is set in cable reel control cabinet, and PLC controller output signal to trolley.The utility model relates to a kind of gantry crane power supply cable winding fault detection device, can real-time detection judge the operating state and fault condition of cable reel, immediately stop gantry crane trolley movement when cable reel fails, prevent power supply cable damage.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a fault detection device for the power supply cable reel of a gantry crane. Background Technology

[0002] Gantry cranes typically use cable reels for power supply. During operation, situations frequently arise where the cable reel malfunctions and stops winding or unwinding the power cable while the crane trolley continues to move, causing the power cable to be damaged or broken, resulting in work stoppages and production halts.

[0003] To prevent such accidents from occurring, it is urgent to design a detection and control method to monitor the operation of the cable reel in real time. If the reel stops rotating, the gantry crane trolley should be stopped immediately to prevent the accident from escalating and the power cable from being pulled or broken. Utility Model Content

[0004] To address the above problems, a fault detection device for the power supply cable reel of a gantry crane is proposed.

[0005] The technical solution of this utility model is as follows: a power supply cable reel fault detection device for a gantry crane, including a trolley, an electric reel bracket on the side of the trolley, a cable reel on the electric reel bracket, a cable wound around the circumference of the cable reel, the end of the cable away from the cable reel connected to a power supply box, a rotary encoder on the electric reel bracket, the rotary encoder shaft connected to the cable reel through a flexible coupling, the rotary encoder outputs pulse signals to the high-speed counting terminal of the PLC controller, the trolley outputs signals to the switch input terminal of the PLC controller, the PLC controller is installed in the cable reel control cabinet, and the PLC controller outputs signals to the trolley.

[0006] The beneficial effects of this utility model are as follows: This utility model provides a fault detection device for the power supply cable reel of a gantry crane, which can detect and judge the operating status and fault conditions of the cable reel in real time. When the cable reel fails, the movement of the gantry crane trolley is stopped immediately to prevent damage to the power supply cable. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the power supply cable reel fault detection device for gantry cranes according to this utility model;

[0008] Figure 2 This is a control flowchart for the power supply cable reel fault detection device for gantry cranes according to this utility model.

[0009] The component names corresponding to the various reference numerals in the diagram are as follows:

[0010] 1. Trolley; 2. Cable reel; 21. Electric reel bracket; 3. Rotary encoder; 4. PLC controller; 5. Power supply box; 6. Cable. Detailed Implementation

[0011] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0012] refer to Figure 1 As shown in the figure, this application discloses a power supply cable reel fault detection device for a gantry crane, including a trolley 1. An electric reel bracket 21 is provided on the side of the trolley 1, and a cable reel 2 is provided on the electric reel bracket 21. A cable 6 is wound around the circumference of the cable reel 2. The end of the cable 6 away from the cable reel 2 is connected to a power supply box 5. A rotary encoder 3 is provided on the electric reel bracket 21. The rotating shaft of the rotary encoder 3 is connected to the cable reel 2 through a flexible coupling. The rotary encoder 3 is a device with 2500 pulses per revolution. When the cable reel 2 rotates, the rotary encoder 3 generates forward counting pulses or reverse counting pulses. When the cable reel 2 stops rotating, the encoder does not generate pulses.

[0013] The rotary encoder 3 generates forward or reverse counting pulses, which are sent to the high-speed counting terminal of the PLC controller 4. The forward travel signal of the trolley 1 and the backward travel signal of the trolley 1 are sent to the switch input terminal of the PLC controller 4. The PLC controller 4 is located in the cable reel control cabinet.

[0014] PLC controller 4 obtains the rotational speed and direction signal of cable reel 2 based on the pulse signal from the high-speed counter terminal, and obtains the current operating status of trolley 1 based on the travel signal of trolley 1. PLC controller 4 then uses these signals and... Figure 2 The control logic shown determines the operating status and fault condition of the power supply cable reel. When the power supply cable reel malfunctions, a fault signal is immediately issued, causing the gantry crane trolley 1 to stop working, thereby preventing the accident from escalating.

[0015] The beneficial effects are:

[0016] This utility model discloses a fault detection device for the power supply cable reel of a gantry crane. It can detect and judge the operating status and fault conditions of the cable reel 2 in real time. When the cable reel 2 malfunctions, it can immediately stop the movement of the gantry crane trolley 1 to prevent damage to the power supply cable.

[0017] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0018] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A fault detection device for power supply cable reel of a gantry crane, characterized in that, The system includes a trolley (1), an electric reel bracket (21) on the side of the trolley (1), a cable reel (2) on the electric reel bracket (21), a cable (6) wrapped around the circumference of the cable reel (2), and the end of the cable (6) away from the cable reel (2) connected to the power supply box (5). The electric reel bracket (21) is equipped with a rotary encoder (3), the shaft of the rotary encoder (3) is connected to the cable reel (2) through a flexible coupling, the rotary encoder (3) outputs pulse signals to the high-speed counting terminal of the PLC controller (4), the trolley (1) outputs signals to the switch input terminal of the PLC controller (4), the PLC controller (4) is located in the cable reel control cabinet, and the PLC controller (4) outputs signals to the trolley (1).

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