Power distribution cabinet drawer drive control method and system

Abstract

The application discloses a power distribution cabinet drawer driving control method and system, comprising the following steps: determining that the current operation mode is a manual operation mode or an electric operation mode; in the manual operation mode, driving the drawer to a test position by a manual driving mechanism; switching the current operation mode to the electric operation mode; in the electric operation mode, receiving a shake-in instruction by a controller, controlling an electric driving mechanism to drive the drawer to move from the test position to a working position, and locking the opening operation and the closing operation of a circuit breaker during the driving process of the electric driving mechanism; detecting that the drawer reaches the working position, allowing the closing operation of the circuit breaker and locking the opening operation of the circuit breaker; locking the operation of the electric driving mechanism after the closing operation of the circuit breaker is performed; in the closing state of the circuit breaker, when it is determined that the current operation mode is switched to the manual operation mode, the circuit breaker is opened, and the drawer is allowed to be shaken out by the manual driving mechanism. The number of parts can be simplified, the use is facilitated, and the use threshold is reduced.

Description

Technical Field

[0001] This invention relates to power distribution equipment, specifically to a method and system for driving and controlling a power distribution cabinet drawer. Background Technology

[0002] A typical distribution cabinet drawer usually has three working states: disconnected (disconnected position), test (test position), and working (working position). In some configurations, the distribution cabinet drawer is equipped with a circuit breaker, which controls the closing and opening of the circuit. The distribution cabinet drawer has primary and secondary plug-in pairs. The primary plug-in pairs form a primary circuit, serving as the main power supply; the secondary plug-in pairs form a secondary circuit, used to power the components on the drawer and can be used for testing.

[0003] Currently, to ensure operational safety, power distribution cabinet drawers typically employ interlocking structures for locking. Operators must perform specific steps to operate the drawers. For example, they must first press a button on the edge of the drawer handle to disconnect the power and unlock the drawer before it can be pulled out. However, this mechanical interlocking method results in a complex interlocking structure, numerous required components, and high assembly costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a method and system for driving and controlling the drawer of a power distribution cabinet, which simplifies the number of parts, facilitates use, and reduces the barrier to entry for users.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A method for driving and controlling a power distribution cabinet drawer, comprising the following steps: Determine whether the current operating mode is manual or electric; When the current operating mode is determined to be manual operation mode, the power distribution cabinet drawer is driven from the initial position to the test position through the manual drive mechanism. Switch the current operating mode to electric operating mode; In the electric operation mode, the controller receives the swing-in command and controls the electric drive mechanism to move the drawer from the test position to the working position. During the driving process of the electric drive mechanism, the opening and closing operations of the circuit breaker are locked. When the drawer is detected to have reached the working position, the circuit breaker is allowed to be closed and the circuit breaker is locked to open. After the circuit breaker performs the closing operation, the operation of the electric drive mechanism is locked. When the circuit breaker is in the closed state and the current operating mode is determined to be switched to manual operating mode, the circuit breaker is controlled to perform a tripping operation, and then the drawer is allowed to be opened by the manual drive mechanism.

[0006] As a further improvement of the present invention, determining whether the current operating mode is a manual operating mode or an electric operating mode includes: The mode signal is output through a baffle that can be slidably set at the manual crank handle hole and a detection switch that cooperates with the baffle. When the baffle is in the first position that exposes the manual crank handle hole, the detection switch outputs a first mode signal indicating the manual operation mode, and determines that the current operation mode is the manual operation mode; When the baffle is in the second position that blocks the manual crank handle hole, the detection switch outputs a second mode signal indicating the electric operation mode, and determines that the current operation mode is the electric operation mode.

[0007] As a further improvement of the present invention, the power distribution cabinet drawer is driven from the initial position to the test position by a manual drive mechanism, with both the primary and secondary circuits of the drawer de-energized; in the test position, the secondary circuit is connected and the controller is energized.

[0008] As a further improvement of the present invention, the position status displayed by the controller includes at least one of the test position, working position and closed position.

[0009] As a further improvement of the present invention, the detection switch is one of a micro switch, a photoelectric switch, or a Hall sensor.

[0010] As a further improvement of the present invention, the detection switch is a normally open switch or a normally closed switch.

[0011] A power distribution cabinet drawer drive control system is also provided, including a touch screen and a computer program set in the touch screen, wherein the touch screen implements the method described in any of the above through the computer program.

[0012] The beneficial effects of this invention are that it replaces the traditional mechanical interlock structure with an electronically controlled logic interlock. Using software logic and a small number of electronic components, it achieves multi-level safety interlocking of the drawer in both manual and electric modes. During electric drive, it locks the opening and closing operations; after reaching the working position, it unlocks and closes; after closing, it locks the drive operation; and when manually intervened, it triggers automatic tripping to prevent hot-plugging. This solution simplifies the hardware structure of the drawer interlock, reduces the number of parts and assembly costs, and eliminates the risk of interlock failure due to mechanical wear through the deterministic nature of the electronically controlled logic, thus improving operational safety and reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the drive control process. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0015] Referring to the accompanying drawings, a power distribution cabinet drawer drive control method according to this embodiment includes the following steps: Determine whether the current operating mode is manual or electric; When the current operating mode is determined to be manual operation mode, the power distribution cabinet drawer is driven from the initial position to the test position through the manual drive mechanism. Switch the current operating mode to electric operating mode; In the electric operation mode, the controller receives the swing-in command and controls the electric drive mechanism to move the drawer from the test position to the working position. During the driving process of the electric drive mechanism, the opening and closing operations of the circuit breaker are locked. When the drawer is detected to have reached the working position, the circuit breaker is allowed to be closed and the circuit breaker is locked to open. After the circuit breaker performs the closing operation, the operation of the electric drive mechanism is locked. When the circuit breaker is in the closed state and the current operating mode is determined to be switched to manual operating mode, the circuit breaker is controlled to perform a tripping operation, and then the drawer is allowed to be opened by the manual drive mechanism.

[0016] In the above control method, at the start of operation, the operation mode switching component outputs a mode signal, and the controller determines whether the current operation mode is manual or electric based on the mode signal. If the current operation mode is manual, the operator can drive the drawer from the initial position (where both the primary and secondary circuits are de-energized) to the test position using the manual drive mechanism (e.g., by inserting the throttle into the manual crank hole). After reaching the test position, the operator can switch to electric operation mode (or continue in manual mode) using the operation mode switching component. For example, the operator triggers the mode switching action, causing the operation mode switching component to output an electric mode signal to the controller. In electric operation mode, the controller receives the operator's crank-in command (by pressing a button on the controller) and controls the electric drive mechanism to move the drawer from the test position to the working position. Since the drawer is in motion at this time, accidental activation of the tripping or closing operation may cause an electric arc or equipment damage. Therefore, the controller locks the tripping and closing operations of the circuit breaker throughout the electric drive (disabling the corresponding buttons), and any triggering of the tripping or closing button will not respond. Once the position detection component detects that the drawer has reached the working position, the controller releases the lock on the closing operation, allowing the operator to press the closing button to close the circuit breaker. However, the opening operation remains locked to ensure the safety of the closing operation. After the circuit breaker is closed, the controller locks the operation of the electric drive mechanism (i.e., both the rocker-in and rocker-out buttons are disabled) to prevent safety risks caused by drawer movement while the circuit breaker is closed. Furthermore, if the operation mode switching component outputs a mode signal indicating manual operation mode while the circuit breaker is closed (e.g., triggered by the operator manually removing the drawer), the circuit breaker will be quickly disconnected, putting it in the open state. This fundamentally eliminates the safety hazard of live plugging and unplugging, ensuring the safety of manual operation.

[0017] By employing an electronically controlled interlocking system instead of the traditional mechanical interlocking structure, the signal interaction between the operation mode switching component and the controller achieves safe isolation between manual and electric modes: throughout the entire electric drive process, the opening and closing operations are reliably locked, preventing safety accidents caused by accidental operation; after closing, the drive operation is locked, avoiding electrical risks caused by accidental drawer movement, requiring the opening button to be triggered before the opening and closing operations can be unlocked; when switching to manual mode from the closed state, the circuit breaker is forcibly opened, preventing the danger of plugging and unplugging the drawer while it is energized. All of the above interlocking logic is executed by the controller via electrical signals, eliminating the need for complex mechanical linkages, cams, latches, and other structural components, thus solving the problems of complex mechanical interlocking structures, numerous parts, and high assembly costs in existing technologies.

[0018] To facilitate the determination of the current operating mode, in one optional scheme, a mode signal is output via a baffle slidably disposed at the manual crank handle hole and a detection switch that cooperates with the baffle. Specifically: when the baffle is in a first position exposing the manual crank handle hole, the detection switch outputs a first mode signal indicating manual operation mode, and the controller determines that the current mode is manual; when the baffle is in a second position obscuring the manual crank handle hole, the detection switch outputs a second mode signal indicating electric operation mode, and the controller determines that the current mode is electric. That is, the operating mode switching component is implemented using the above scheme.

[0019] By employing a baffle in conjunction with a detection switch, mechanical displacement is converted into an electrical signal output. The baffle can be designed as a simple sliding plate structure, and the detection switch can be positioned at the end or beginning of the baffle's sliding path. The process of the baffle sliding from the first position to the second position is the process of switching the operating mode from manual to electric. The operator can complete the mode switch without touching any electrical components. In manual operation mode, the manual crank hole is exposed, allowing the operator to insert the crank for cranking. In electric operation mode, the manual crank hole is blocked, preventing the entry of foreign objects in non-electric mode and providing a clear visual indication to help the operator confirm that the current operating mode is electric. This method of using the sliding position of the baffle in conjunction with the detection switch enables reliable determination of the operating mode with a minimal hardware structure, further reducing reliance on complex mechanical interlocking components.

[0020] Further optimization can be achieved by manually driving the drawer from the open position to the test position while both the primary and secondary circuits are de-energized. This ensures that the drawer is in a completely de-energized and safe environment during manual operation. In the test position, the secondary circuit is connected, and the controller receives power through the secondary circuit and illuminates. The primary circuit remains de-energized, allowing the user to perform electric operation, which offers higher safety.

[0021] Because the secondary circuit is only connected at the test position and disconnected when the drawer is in the initial position, the controller is not powered on and does not operate. This ensures that the electric operation cannot be activated before the drawer reaches the test position. Combining the dual power-off conditions of the primary and secondary circuits, the manual pushing of the drawer is always performed in a zero-voltage environment, thus resolving the potential safety risks of residual voltage or accidental power-on when operators manually push the drawer in, as present in existing technologies.

[0022] In some options, the controller's display interface can show position status information, including test position, working position, and closed position. For example, when the drawer is in the test position, the controller displays "Test Position"; when the drawer is electrically driven to the working position, the controller switches to displaying "Working Position"; and when the circuit breaker is closed, the controller displays "Closed Position." This progressively increasing position status display allows operators to clearly grasp the current precise status of the drawer, reducing misjudgments caused by opaque information. Clear visual status feedback can solve the problem of operators struggling to determine whether to proceed to the next step when operational process information is incomplete.

[0023] Based on the above, the detection switch can be one of a micro switch, a photoelectric switch, or a Hall sensor. Micro switches, as a contact-based solution, are low-cost and technologically mature, suitable for cost-sensitive applications; photoelectric switches, as a non-contact solution, have no mechanical wear and a long lifespan, suitable for high-frequency operations; Hall sensors detect the baffle position using changes in magnetic fields, have strong anti-interference capabilities, and are suitable for harsh industrial environments. All of these detection switches can reliably detect the baffle position through different working principles, providing flexible implementation options for the system.

[0024] Furthermore, the detection switch can be configured as either a normally open or normally closed switch. When a normally open switch is used, the baffle reaches the trigger position, causing the detection switch to close. The controller detects a low-level or high-level signal and determines the operating mode accordingly. When a normally closed switch is used, the baffle reaches the trigger position, causing the detection switch to open. The controller determines the operating mode by the disappearance of the detection signal. Both configurations are commonly used switch polarity configurations in this field and can be flexibly selected by the designer according to the specific requirements of the control system circuit.

[0025] Based on the above method, a power distribution cabinet drawer drive control system is also provided, including a touch screen and a computer program installed in the touch screen. The touch screen implements the method described in any of the above descriptions through the computer program. The controller can be directly the touch screen or a control component on the touch screen.

[0026] In summary, the complete workflow of the distribution cabinet drawer drive control system and method is as follows: With both the primary and secondary circuits de-energized, the operator pushes the drawer into the distribution cabinet. The operator operates the operation mode switching component, for example, sliding the baffle from a position obscuring the manual crank handle hole to a position exposing the manual crank handle hole, triggering the detection switch and outputting a manual operation mode signal to the controller. In manual operation mode, the operator inserts the crank handle into the manual crank handle hole, manually cranking the drawer from the initial position to the test position. Upon reaching the test position, the secondary circuit is activated, and the controller receives power through the secondary circuit. The position detection component detects the drawer in the test position and sends a signal to the controller, which displays the test position. Next, the operator operates the operation mode switching component to switch to electric operation mode, for example, sliding the baffle back to the position obscuring the manual crank handle hole, triggering the detection switch again and outputting an electric operation mode signal to the controller. In electric operation mode, the operator presses the crank-in button on the controller, which sends a drive command to the electric drive mechanism, causing the electric drive mechanism to move the drawer from the test position to the working position. Throughout the movement, the controller executes the first interlock rule: locking the circuit breaker's opening and closing operations, preventing any opening or closing operation by the operator. When the drawer reaches the working position, the controller receives a position signal through the position detection component, stops the electric drive mechanism, switches the controller display to the working position, and executes the second interlock rule: allowing closing operations while continuing to lock opening operations. When the operator presses the closing button, the circuit breaker closes, the controller display switches to the closed position, and executes the third interlock rule: locking all operations of the electric drive mechanism, disabling the crank-in and crank-out buttons, and unlocking the crank-in and crank-out buttons after the circuit breaker opens. If the drawer needs to be removed at this time, the operator can switch to manual operation mode using the operation mode switching component, for example, by sliding the baffle back to expose the manual crank hole, and the detection switch outputs a manual operation mode signal. The controller detects the manual mode signal in the closed state and executes the fourth interlock rule: immediately controlling the circuit breaker to perform an opening operation; after the opening is completed, the lock on the electric drive mechanism is released, and the drawer can be cranked out via the manual drive mechanism. The operator inserts the throttle into the manual crank hole and manually cranks it in the reverse direction to move the drawer from the working position to the test position or the initial position.

[0027] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for driving and controlling a drawer of a power distribution cabinet, characterized in that, Includes the following steps: Determine whether the current operating mode is manual or electric; When the current operating mode is determined to be manual operation mode, the power distribution cabinet drawer is driven from the initial position to the test position through the manual drive mechanism. Switch the current operating mode to electric operating mode; In the electric operation mode, the controller receives the swing-in command and controls the electric drive mechanism to move the drawer from the test position to the working position. During the driving process of the electric drive mechanism, the opening and closing operations of the circuit breaker are locked. When the drawer is detected to have reached the working position, the circuit breaker is allowed to be closed and the circuit breaker is locked to open. After the circuit breaker performs the closing operation, the operation of the electric drive mechanism is locked. When the circuit breaker is in the closed state and the current operating mode is determined to be switched to manual operating mode, the circuit breaker is controlled to perform a tripping operation, and then the drawer is allowed to be opened by the manual drive mechanism.

2. The power distribution cabinet drawer drive control method according to claim 1, characterized in that, Determining whether the current operating mode is manual or electric includes: The mode signal is output through a baffle that can be slidably set at the manual crank handle hole and a detection switch that cooperates with the baffle. When the baffle is in the first position that exposes the manual crank handle hole, the detection switch outputs a first mode signal indicating the manual operation mode, and determines that the current operation mode is the manual operation mode; When the baffle is in the second position that blocks the manual crank handle hole, the detection switch outputs a second mode signal indicating the electric operation mode, and determines that the current operation mode is the electric operation mode.

3. The power distribution cabinet drawer drive control method according to claim 1, characterized in that, The power distribution cabinet drawer is driven from its initial position to the test position by a manual drive mechanism, with both the primary and secondary circuits of the drawer de-energized; in the test position, the secondary circuit is connected and the controller is energized.

4. The power distribution cabinet drawer drive control method according to claim 1, characterized in that, The position status displayed by the controller includes at least one of the following: test position, working position, and closed position.

5. The power distribution cabinet drawer drive control method according to claim 2, characterized in that, The detection switch is one of a micro switch, a photoelectric switch, or a Hall sensor.

6. The power distribution cabinet drawer drive control method according to claim 2, characterized in that, The detection switch is either a normally open switch or a normally closed switch.

7. A control system for driving a drawer in a power distribution cabinet, characterized in that, The device includes a touch screen and a computer program disposed thereon, wherein the touch screen implements the method as described in any one of claims 1 to 6 through the computer program.

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