Overcurrent protection device for back flushing of a hoist

Abstract

The utility model relates to engineering machinery field especially, especially electric continuous wall grab bucket, specifically is a winch's back flush current overvoltage protection device, including at least one winch motor controller, braking resistance, power distribution unit PDU, power battery and current collector, wherein winch motor controller connects to PDU, is used to receive electric energy and controls the operation of winch motor, braking resistance sets up in the delivery end of winch motor controller, is used to absorb the back flush current of overvoltage produced by winch motor deceleration or stop, PDU connects to power battery and current collector, is used to distribute electric energy and manages power connection, power battery provides electric energy for system and is used to recover the electric energy of potential energy conversion of winch lowering, links to PDU to support the operation of whole device, current collector links to PDU, is used to expand power distribution function, ensures the stability of multi-channel power supply. The winch back flush current overvoltage protection device of the utility model has multilayer protection mechanism and can adapt to different working conditions, effectively prevents the damage of equipment by back flush current overvoltage.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery, and in particular to an electric continuous wall grab bucket, specifically a backflush current overvoltage protection device for a winch. Background Technology

[0002] Electric winches are widely used in industry, especially in underground engineering, ports, and mines, where they perform heavy-duty tasks such as cargo lifting and soil handling. However, during the frequent starting and stopping of continuous wall grabs, motor inertia often causes backflow current overvoltage. If this current is not effectively controlled, it can lead to performance degradation of critical components such as the motor controller, increasing maintenance costs; in severe cases, it can cause electrical failures or even equipment fires, seriously threatening operational safety and production continuity. Although existing technologies attempt to solve the problem through circuit optimization, they still suffer from drawbacks such as unstable reliability and high costs in practical applications, making it difficult to completely eliminate the hidden dangers caused by backflow current overvoltage. A more precise and efficient innovative solution is urgently needed. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects and propose a backflush current overvoltage protection device that has a protective function for winches.

[0004] To achieve the above objectives, this utility model is implemented as follows: A backflush current overvoltage protection device for a winch includes at least one winch motor controller, a braking resistor, a power distribution unit (PDU), a power battery, and a current collector. The winch motor controller is connected to the PDU and is used to receive electrical energy and control the operation of the winch motor. The braking resistor is located at the output terminal of the winch motor controller and is used to absorb the backflush current caused by overvoltage when the winch motor decelerates or stops. The PDU is connected to the power battery and the current collector and is used to distribute electrical energy and manage power connections. The power battery provides electrical energy to the system and is used to recover the electrical energy converted from the potential energy of the winch during lowering. It is connected to the PDU to support the operation of the entire device. The current collector is connected to the PDU and is used to expand the power distribution function and ensure the stability of multi-channel power supply.

[0005] The aforementioned overvoltage protection device for the backflush current of the winch also includes an AC branch line, which is used to further distribute the AC power to other related modules or equipment to optimize the transmission and management of electrical energy.

[0006] The aforementioned overvoltage protection device for backflush current of the winch has an adjustable trigger current threshold for the braking resistor, which can be dynamically adjusted according to the actual magnitude of the backflush current to adapt to different working conditions and protection requirements.

[0007] The aforementioned hoist overvoltage protection device for backflush current integrates a high-voltage circuit protection module within the PDU, which can provide overload and short-circuit protection for the motor controller, braking resistor, and other key modules under high-voltage conditions.

[0008] The aforementioned hoist overvoltage protection device for backflush current includes a current feedback module between the PDU and the current collector, which is used to monitor current changes in real time and optimize the stability and reliability of power distribution by correcting the distribution logic.

[0009] The aforementioned overvoltage protection device for backflush current of the winch further includes an alarm module for issuing an alarm when the braking resistor, winch motor, or PDU malfunctions, so as to facilitate timely maintenance.

[0010] The aforementioned overvoltage protection device for backflush current of the winch is connected to the braking resistor and the winch motor controller via a dedicated electrical circuit to ensure rapid current response and efficient current absorption.

[0011] The aforementioned hoist's overvoltage protection device for backflow current includes a monitoring module configured between the power battery and the PDU to monitor battery charge, current load, and temperature status in real time, thereby optimizing system energy management and extending battery life.

[0012] This utility model proposes a winch backflow current overvoltage protection device with a multi-layer protection mechanism: First, the braking resistor is dynamically adjusted to adapt to different working conditions, effectively preventing equipment damage from backflow current. Second, it is highly integrated, with the PDU integrating a high-voltage circuit protection module and a current feedback module to optimize power distribution and improve system stability. Third, it is highly intelligent and expandable, with alarm modules, power battery monitoring, and other functions giving the system intelligent characteristics and supporting complex multi-channel power distribution. Finally, it is economical and practical, with optimized reliability and maintenance costs, suitable for complex working conditions such as ports and mines, combining both economic efficiency and practicality. Attached Figure Description

[0013] Figure 1 This is a control principle diagram of the overvoltage protection device for the backflush current of the winch shown in this utility model.

[0014] Figure 2 This is a schematic diagram of the overvoltage protection device for the backflush current of the winch shown in this utility model. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0016] like Figure 1, Figure 2 As shown, a backflush current overvoltage protection device for a winch comprises a winch motor 1, a winch motor controller 2, a braking resistor, a power distribution unit (PDU), a power battery, a current collector, an AC branch line, and an alarm module.

[0017] When the hoist motor is running, the motor controller 2 is responsible for receiving electrical energy and controlling the motor's start, operation, and stop.

[0018] When the hoist motor 1 decelerates or stops, a backflow current is generated. At this time, the braking resistor is connected to the output terminal of the motor controller to absorb the backflow current and prevent it from damaging the motor controller and other components. The trigger current threshold of the braking resistor can be dynamically adjusted according to the actual operating conditions.

[0019] The Power Distribution Unit (PDU), as the core of the system, connects the power battery, current collector, and AC branch line, and is responsible for the rational distribution of electrical energy to the motor controller and other related modules. The PDU integrates a high-voltage circuit protection module that monitors the current load in real time, providing protection against overload and short circuits. Simultaneously, a current feedback module is installed between the PDU and the current collector to monitor current changes in real time, optimizing the stability and reliability of power management.

[0020] The power battery provides electrical support to the system and is used to recover the electrical energy converted from the potential energy of the winch during descent. It is connected to the PDU and the monitoring module monitors the battery charge, current load and temperature status in real time to optimize system energy consumption management and extend battery life.

[0021] The current collector extends power distribution capabilities and can be connected to an external power source to enhance system power supply. AC branch lines further distribute AC power to other related modules or devices, optimizing the power supply structure.

[0022] The alarm module issues a warning signal when the braking resistor, hoist motor, or PDU malfunctions, reminding the user to perform timely maintenance and ensure the safe operation of the system.

[0023] Through the above specific embodiments, it can be seen that the winch backflush current protection device proposed by this utility model consists of a structure, the function of each component, and the working process. It aims to provide comprehensive backflush current protection for winches, extend the service life of equipment, and ensure stable system operation.

[0024] This utility model proposes a winch backflush current overvoltage protection device with a multi-layer protection mechanism: First, the braking resistor is dynamically adjusted to adapt to different operating conditions, effectively preventing equipment damage from backflush current overvoltage. Second, it is highly integrated, with the PDU integrating a high-voltage circuit protection module and a current feedback module to optimize power distribution and improve system stability. Third, it is highly intelligent and expandable, with alarm modules, power battery monitoring, and other functions giving the system intelligent characteristics and supporting complex multi-channel power distribution. Finally, it is economical and practical, with optimized reliability and maintenance costs, combining both economic efficiency and practicality.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A backflush current overvoltage protection device for a winch, characterized in that, The system includes at least one hoist motor controller, a braking resistor, a power distribution unit (PDU), a power battery, and a current collector. The hoist motor controller is connected to the PDU to receive electrical energy and control the operation of the hoist motor. The braking resistor is located at the input of the hoist motor controller to absorb the backflow current caused by overvoltage when the hoist motor decelerates or stops. The PDU is connected to the power battery and the current collector to distribute electrical energy and manage power connections. The power battery provides electrical energy to the system and is used to recover the electrical energy converted from the potential energy of the hoist during lowering. It is connected to the PDU to support the operation of the entire device. The current collector is connected to the PDU to expand the power distribution function and ensure the stability of multi-channel power supply.

2. The overvoltage protection device for backflush current of the winch according to claim 1 further includes an AC branch line for further distributing AC power to other related modules or equipment to optimize power transmission and management.

3. The overvoltage protection device for backflush current of the winch according to claim 1, characterized in that, The trigger current threshold of the braking resistor is adjustable and can be dynamically adjusted according to the actual magnitude of the backflush current to adapt to different operating conditions and protection requirements.

4. The overvoltage protection device for backflush current of the winch according to claim 1, characterized in that, The PDU integrates a high-voltage circuit protection module, which can provide overload and short-circuit protection for the motor controller, braking resistor and other key modules under high-voltage conditions.

5. The overvoltage protection device for backflush current of the winch according to claim 1, characterized in that, A current feedback module is installed between the PDU and the current collector to monitor current changes in real time and optimize the stability and reliability of power distribution by correcting the distribution logic.

6. The overvoltage protection device for backflush current of the winch according to claim 1, characterized in that, The device further includes an alarm module for issuing an alarm when the braking resistor, hoist motor, or PDU malfunctions, so as to facilitate timely maintenance.

7. The overvoltage protection device for backflush current of the winch according to claim 1, characterized in that, The braking resistor and the hoist motor controller are connected via a dedicated electrical circuit to ensure rapid current response and efficient current absorption.

8. The overvoltage protection device for backflush current of the winch according to claim 1, characterized in that, The connection between the power battery and the PDU is equipped with a monitoring module to monitor the battery power, current load and temperature status in real time, so as to optimize system energy consumption management and extend battery life.

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