Fire pump control device of fire-fighting unmanned aerial vehicle
Through the combination of high-voltage contactor, pre-charge contactor and delay module, the high-voltage ignition problem of fire-fighting drone fire pumps is solved, and the stable operation of the fire-fighting pump driver and the safety of the equipment are achieved.
Patent Information
- Application Number
- CN202520941580.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2035-05-14
AI Technical Summary
Existing fire-fighting drone fire pumps are prone to high-voltage ignition at the moment of power-on, which leads to aging of the connector or switch, posing a safety risk.
The high-voltage contactor, pre-charge contactor and delay module are used to divide the voltage before starting and close the high-voltage contactor with a pre-charge resistor to stabilize the current to avoid high-voltage ignition, and combine the waterproof aluminum shell to protect the electrical components.
Effectively buffer high-voltage ignition during power-on moments, ensuring the safe and reliable operation of the fire pump driver and extending the service life of the equipment.
Smart Images
Figure CN223048989U_ABST
Abstract
Description
Technical Field
[0001] The utility model is applied to the technical field of control devices, and particularly relates to a control device for a fire pump of a fire-fighting UAV. Background Art
[0002] At present, the fire pumps of medium and large-sized fire-fighting UAVs generally use electric drive, and power needs to be taken from the 400V platform of the high-voltage power battery of the UAV and connected to the driver device of the fire pump through an interface. However, ordinary connectors or switches face the phenomenon of high-voltage arcing during the power-on moment, which will accelerate the aging of the connectors or switches and thus cause risks.
[0003] Therefore, a control device for a fire pump of a fire-fighting UAV is needed to ensure the safe and reliable operation of the fire pump drive circuit and the entire system. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a control device for a fire pump of a fire-fighting UAV that can buffer the high-voltage arcing phenomenon caused during the power-on moment.
[0005] The technical solution adopted by the utility model is as follows: The utility model includes a high-voltage contactor, a power supply module, a pre-charge contactor, and a delay module. The input ends of the high-voltage contactor and the pre-charge contactor are both connected to the 400V input terminal. The output end of the high-voltage contactor is connected to the 400V output terminal. The pre-charge contactor is connected to the 400V output terminal through a pre-charge resistor. The power supply module is connected to the control end of the high-voltage contactor through the delay module.
[0006] As can be seen from the above solution, by setting the pre-charge contactor and the pre-charge resistor, the 400V input terminal and the 400V output terminal are conducted through the pre-charge resistor before full startup, and then voltage division is carried out through the pre-charge resistor and a certain degree of current is generated in the fire pump driver for buffering to prevent the high-voltage arcing phenomenon caused by the sudden increase of current and voltage. At the same time, by setting the delay module, the high-voltage contactor is delayed to close, so that the current of the fire pump driver is stable during the pre-charge stage, and the current and voltage fluctuations are avoided from being too large to damage the fire pump driver.
[0007] A preferred solution is that the power supply module includes a 12V input terminal and a conversion unit. The control end of the pre-charge contactor is connected to the 12V input terminal. The control end of the delay module is connected to the conversion unit. The input end of the delay module is connected to the 12V input terminal. The output end of the delay module is connected to the control end of the high-voltage contactor.
[0008] One preferred solution is that the delay module includes a timer and a conduction contactor. The input end of the timer is connected to the output end of the conversion unit, and the output end of the timer is connected to the control end of the conduction contactor through a field-effect transistor.
[0009] One preferred solution is that the present utility model further includes a waterproof aluminum shell. The high-voltage contactor, the power supply module, the pre-charge contactor, the delay module, and the pre-charge resistor are all arranged inside the waterproof aluminum shell. Sealing joints matching with the 400V input terminal and the 400V output terminal are respectively arranged at both ends of the waterproof aluminum shell. Description of the Drawings
[0010] Figure 1 is the system block diagram of the present utility model;
[0011] Figure 2 is the circuit schematic diagram of the present utility model;
[0012] Figure 3 is the structural schematic diagram of the present utility model. Detailed Embodiments
[0013] As Figure 1 and Figure 2 shown, in this embodiment, the present utility model includes a high-voltage contactor 1, a power supply module 2, a pre-charge contactor 3, and a delay module 4. The input ends of the high-voltage contactor 1 and the pre-charge contactor 3 are both connected to a 400V input terminal 5. The output end of the high-voltage contactor 1 is connected to a 400V output terminal 6. The pre-charge contactor 3 is connected to the 400V output terminal 6 through a pre-charge resistor R1. The power supply module 2 is connected to the control end of the high-voltage contactor 1 through the delay module 4. The 400V input terminal 5 is electrically connected to the 400V high-voltage power battery of the fire-fighting drone, and the 400V output terminal 6 is connected to the fire pump driver. When starting the fire pump, an external controller provides a 12V control voltage to the power supply module 2. At this time, the pre-charge contactor 3 closes, so that the 400V input terminal 5 is conducted to the 400V output terminal 6 through the pre-charge resistor R1, and then voltage division is carried out through the pre-charge resistor R1 to provide a pre-charge voltage to the fire pump driver. After delaying for a period of time through the delay module 4 until the fire pump driver reaches a current-stable state under the pre-charge voltage, the high-voltage contactor 1 is closed, so as to realize the connection and stable operation of the fire pump driver.
[0014] In this embodiment, the power supply module 2 includes a 12V input terminal 21 and a conversion unit 22. The control terminal of the pre-charge contactor 3 is connected to the 12V input terminal 21. The control terminal of the delay module 4 is connected to the conversion unit 22. The input terminal of the delay module 4 is connected to the 12V input terminal 21. The output terminal of the delay module 4 is connected to the control terminal of the high-voltage contactor 1. The conversion unit 22 includes a voltage regulator of model 78L05. The delay module 4 includes a timer U2 of model NE555DR and a conduction contactor RLY3 of model SDR-12VDC-SL-C. The input terminal of the timer U2 is connected to the output terminal of the conversion unit 22. The output terminal of the timer U2 is connected to the control terminal of the conduction contactor RLY3 through a field-effect transistor Q3. When a 12V control voltage is applied, the voltage regulator converts the 12V constant voltage to 5V and conducts it to the timer U2. After receiving the working voltage, the timer U2 starts timing and closes the field-effect transistor Q3 after a set time, enabling the 12V input terminal 21 to conduct to the control terminal of the conduction contactor RLY3. The conduction contactor RLY3 conducts the coil of the high-voltage contactor 1, thereby closing the high-voltage contactor 1, achieving full conduction between the 400V input terminal 5 and the 400V output terminal 6, fully starting the fire pump driver, and then driving the fire pump of the fire-fighting drone to work, realizing the rescue operation.
[0015] As Figure 3 shown, in this embodiment, the present utility model further includes a waterproof aluminum shell 7. The waterproof aluminum shell 7 includes a cover body and a shell that are hermetically fitted to form an inner cavity. The high-voltage contactor 1, the power supply module 2, the pre-charge contactor 3, the delay module 4, and the pre-charge resistor R1 are all arranged inside the waterproof aluminum shell 7. Sealing joints that cooperate with the 400V input terminal 5 and the 400V output terminal 6 are respectively arranged at both ends of the waterproof aluminum shell 7. By providing the waterproof aluminum shell 7, external water vapor is isolated to protect electrical components such as the high-voltage contactor 1, the power supply module 2, the pre-charge contactor 3, the delay module 4, and the pre-charge resistor R1.
[0016] Although the embodiments of the present utility model are described with actual solutions, they do not constitute a limitation to the meaning of the present utility model. For those skilled in the art, modifications to its implementation solutions according to this specification and combinations with other solutions are obvious.
Claims
1. A fire pump control device for a fire-fighting drone, comprising a high-voltage contactor (1) and a power module (2), characterized in that: It also includes a pre-charging contactor (3) and a delay module (4); the input ends of the high-voltage contactor (1) and the pre-charging contactor (3) are both connected to a 400V input terminal (5); the output end of the high-voltage contactor (1) is connected to a 400V output terminal (6); the pre-charging contactor (3) is connected to the 400V output terminal (6) via a pre-charging resistor (R1); and the power module (2) is connected to the control end of the high-voltage contactor (1) via the delay module (4).
2. A fire pump control device for a fire-fighting drone according to claim 1, characterized in that: The power module (2) comprises a 12V input terminal (21) and a conversion unit (22); the control end of the pre-charging contactor (3) is connected to the 12V input terminal (21); the control end of the delay module (4) is connected to the conversion unit (22); the input end of the delay module (4) is connected to the 12V input terminal (21); and the output end of the delay module (4) is connected to the control end of the high-voltage contactor (1).
3. A fire pump control device for a fire-fighting drone according to claim 2, characterized in that: The delay module (4) comprises a timer (U2) and a conduction contactor (RLY3), the input end of the timer (U2) being connected to the output end of the conversion unit (22), and the output end of the timer (U2) being connected to the control end of the conduction contactor (RLY3) via a field effect tube (Q3).
4. A fire pump control device for a fire-fighting drone according to claim 1, characterized in that: It also includes a waterproof aluminum shell (7), wherein the high-voltage contactor (1), the power module (2), the pre-charging contactor (3), the delay module (4) and the pre-charging resistor (R1) are all arranged in the waterproof aluminum shell (7), and the two ends of the waterproof aluminum shell (7) are respectively provided with sealing joints that cooperate with the 400V input terminal (5) and the 400V output terminal (6).