Emergency flameout system of aircraft refueling vehicle

Abstract

The utility model relates to the technical field of emergency flameout systems, in particular to an airplane refueling vehicle emergency flameout system which comprises a vehicle engine, a generator, a platform anti-collision switch, an engine flameout module, a first relay, a vehicle power source and an alarm. The generator, the platform anti-collision switch and the engine flameout module are electrically connected in sequence, and the engine flameout module is in communication connection with the vehicle engine; one end of the first relay coil is connected in series with the generator, and the other end is grounded; and the vehicle power supply, the normally closed contact of the first relay and the alarm are sequentially connected in series. The generator, the first relay and the alarm are arranged, so that a driver can be reminded through the alarm when the generator is abnormal, the engine flames out, and the module cannot work; and meanwhile, under the condition that the anti-collision switch of the platform is not reset after being closed, equipment operation is stopped emergently, and the vehicle is prevented from being started again.

Description

Technical Field

[0001] This utility model relates to the technical field of emergency shutdown systems, and more specifically, to an emergency shutdown system for an aircraft refueling truck. Background Technology

[0002] An aircraft refueling truck is a specialized vehicle used at airports to provide refueling and fuel pumping services for aircraft. These vehicles are typically equipped with fuel tanks and pumps, enabling them to add aviation kerosene into the aircraft via gravity or pressure refueling methods, thus completing the refueling operation. The emergency shutdown system on an aircraft refueling truck is a safety device designed to quickly stop refueling operations in emergencies, ensuring the safety of personnel and equipment.

[0003] In the existing technology, when testing a single emergency shut-off switch or platform anti-collision switch on an aircraft refueling truck, it was found that if any emergency shut-off switch fails to reset or the anti-collision bar switch malfunctions (is in a closed circuit), the refueling truck can still start normally, engage the pump, and raise the platform for refueling operations. However, at this time, all anti-collision bar switches and emergency shut-off switches on the platform are in a malfunctioning state, and the emergency shut-off function will be completely ineffective. There is a risk that the equipment may not be able to stop in an emergency in case of an abnormality, which could lead to the platform colliding with the aircraft or damage to the equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies that cannot stop equipment operation in case of abnormality, and to provide an emergency shutdown system for aircraft refueling trucks that can stop equipment operation in case of abnormality.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An emergency engine shutdown system for an aircraft refueling truck is provided, comprising a vehicle engine, a generator, a platform anti-collision switch, an engine shutdown module, a first relay, a vehicle power supply, and an alarm. The generator is connected to the output terminal of the vehicle engine. The generator, the platform anti-collision switch, and the engine shutdown module are electrically connected in sequence. The engine shutdown module is communicatively connected to the vehicle engine. One end of the coil of the first relay is connected in series with the generator, and the other end is grounded. The vehicle power supply, the normally closed contact of the first relay, and the alarm are connected in series in sequence.

[0007] This utility model discloses an emergency engine shutdown system for an aircraft refueling truck. When the platform anti-collision switch and generator are functioning normally, the platform anti-collision switch is open, the vehicle starts, the vehicle engine drives the generator, the first relay is energized, the alarm circuit is disconnected, the alarm does not activate, and the vehicle starts and runs normally. Upon impact, the platform anti-collision switch closes, the engine shutdown module receives a trigger signal, shutting down the vehicle engine. After shutdown, the first relay is de-energized, the alarm circuit is activated, and vehicle power flows to the alarm through the normally closed contact of the first relay, triggering an alarm signal. When the generator malfunctions, the platform anti-collision switch cannot function for the engine shutdown module. In this case, the first relay is de-energized, the vehicle is powered, and the vehicle power supply flows to the alarm through the normally closed contact of the first relay, triggering an alarm to inform the driver of the generator malfunction. When the platform anti-collision switch closes, the vehicle engine shuts down, and the generator stops running. If the platform anti-collision switch does not reset after closing, but the vehicle engine is restarted, the generator power supply generates a trigger signal to the engine shutdown module, which can shut down the vehicle engine again. This circuit can alert the driver via an alarm when the generator malfunctions and the engine shutdown module fails to function; it can also urgently stop the equipment from operating if the platform anti-collision switch fails to reset after being closed, thus preventing the vehicle from restarting.

[0008] Furthermore, it also includes connecting wires and electrical cabinet terminal blocks; one end of the connecting wire is connected to the platform anti-collision switch, and the other end is installed and connected to the electrical cabinet terminal block; the connecting wire is electrically connected to the engine shutdown module through the electrical cabinet terminal block. The electrical cabinet terminal block facilitates the fixed installation of the connecting wires; simultaneously, the electrical cabinet terminal block and connecting wires facilitate the disassembly and maintenance of the entire emergency shutdown circuit.

[0009] Furthermore, it also includes a fuse, the two ends of which are connected in series with the generator and the platform anti-collision switch, respectively. The end of the first relay coil closest to the generator is connected in series with the fuse. By using a fuse, circuit safety can be protected, preventing dangers caused by excessive current.

[0010] Furthermore, the fuse is set to a 1A fuse. This allows the circuit current to be controlled within a small range, preventing excessive current from causing danger.

[0011] Furthermore, it also includes an emergency shutdown overpass switch, the two ends of which are connected in series with the generator and the platform anti-collision switch, respectively, and one end of the first relay coil is connected in series with the emergency shutdown overpass switch. By setting an emergency shutdown overpass switch, the safety performance of the circuit can be further improved.

[0012] Furthermore, the alarm is a dual-function audible and visual alarm. By using both sound and light to issue an alarm, it can clearly alert the driver.

[0013] Furthermore, it also includes a manual emergency stop switch, which is connected in parallel with the platform anti-collision switch. By setting up a manual emergency stop switch, the vehicle can be manually shut off on the platform in an emergency, further improving the safety performance of the circuit.

[0014] Furthermore, multiple platform anti-collision switches are provided, and these multiple platform anti-collision switches are connected in parallel. By setting multiple platform anti-collision switches, if one platform anti-collision switch fails, the other platform anti-collision switches can still generate trigger signals to the engine shutdown module, thereby improving safety performance.

[0015] Furthermore, each of the platform anti-collision switches is connected in series with a unidirectional diode, the other ends of multiple unidirectional diodes are connected in parallel, and each of the platform anti-collision switches is connected in series with a light-emitting diode (LED), the other ends of multiple LEDs are grounded. The LEDs allow the driver to be informed of the specific platform anti-collision switch that triggered the engine shutdown, thus quickly identifying the location of the anomaly.

[0016] Furthermore, each of the LEDs is connected in series with a resistor. By setting the resistor, the current flowing through the LED can be controlled, preventing the LED from burning out due to excessive current.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The present invention relates to an emergency engine shutdown system for an aircraft refueling truck. By setting up a generator, a first relay and an alarm, the system can alert the driver through the alarm when the generator malfunctions and the engine shutdown module fails to function. At the same time, it can also stop the equipment operation in an emergency if the platform anti-collision switch fails to reset after being closed, thus preventing the vehicle from restarting.

[0019] 2. The emergency engine shutdown system for an aircraft refueling truck of this utility model can inform the driver of the specific platform anti-collision switch that triggers engine shutdown by setting up light-emitting diodes, thereby quickly identifying the abnormal location. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of an emergency shutdown system in the prior art;

[0021] Figure 2 This is a circuit diagram of the emergency engine shutdown system of the aircraft refueling truck in Embodiment 1;

[0022] Figure 3This is a circuit diagram of the emergency shutdown system for the aircraft refueling truck in Embodiment 2.

[0023] In the attached diagram: 1. Vehicle engine; 2. Generator; 3. Platform anti-collision switch; 4. Engine shutdown module; 5. First relay; 6. Vehicle power supply; 7. Alarm; 8. Connecting wire; 9. Electrical cabinet terminal block; 10. Fuse; 11. Emergency shutdown override switch; 12. Manual emergency shutdown switch; 13. Unidirectional diode; 14. Light-emitting diode; 15. Resistor; 16. D+ module. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are 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, the terms describing positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, if the embodiments of this utility model involve descriptions such as "first" and "second," these descriptions are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features. In addition, the meaning of "and / or" in the text is that it includes three parallel options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0026] Example 1

[0027] like Figure 1As shown, the existing emergency shutdown system includes a vehicle power supply 6, a platform anti-collision switch 3, and an engine shutdown module 4. These components are connected in series, and the engine shutdown module 4 is communicatively connected to the vehicle engine 1. When the platform anti-collision switch 3 functions normally (i.e., when it is closed), the vehicle power supply 6 sends a trigger signal to the engine shutdown module 4. Upon receiving the signal, the engine shutdown module 4 shuts down the vehicle engine 1. However, the engine shutdown module 4 cannot recognize non-trigger signals. Therefore, when an abnormal event occurs, such as the platform anti-collision switch 3 remaining in a non-reset state for an extended period (e.g., a faulty contact that cannot separate), the circuit remains closed. When the engine is restarted, because the platform anti-collision switch 3 is still closed, no trigger signal is generated. Thus, the engine shutdown module 4 determines that the vehicle is normal, and the refueling truck can still start normally, engage the pump, and raise the platform for refueling operations. However, at this time, all anti-collision bar switches and emergency shutdown switches on the platform are in a malfunctioning state, and the engine shutdown module 4 function will be completely disabled. There is a risk that the platform may collide with the aircraft or damage the equipment in case of an abnormality.

[0028] This embodiment is a first embodiment of an emergency engine shutdown system for an aircraft refueling truck, such as... Figure 2 As shown, the system includes a vehicle engine 1, a generator 2, a platform anti-collision switch 3, an engine shutdown module 4, a first relay 5, a vehicle power supply 6, and an alarm 7. The generator 2 is connected to the output of the vehicle engine 1; that is, the generator 2 does not work when the vehicle is powered on, and it works when the vehicle starts, i.e., when the vehicle engine 1 starts. In this embodiment, the generator 2 is a chassis-mounted generator. Figure 2 As shown, generator 2 was originally used to power the vehicle's D+ module 16. This circuit is connected in parallel with D+ module 16, and generator 2 simultaneously powers both D+ module 16 and this circuit, eliminating the need for an additional generator 2 and reducing circuit costs. Generator 2, platform anti-collision switch 3, and engine shutdown module 4 are electrically connected in sequence. Engine shutdown module 4 is communicatively connected to the vehicle's engine 1. One end of the coil of the first relay 5 is connected in series with generator 2, and the other end is grounded. Vehicle power supply 6, the normally closed contact of the first relay 5, and alarm 7 are connected in series in sequence. Vehicle power supply 6 is controlled by the vehicle key; that is, when the key is inserted and the vehicle is powered on, vehicle power supply 6 is powered on. To ensure that the added equipment does not affect the safe operation of the original equipment, a separate grounding device is added to the newly added equipment on-site to ensure the reliable and stable operation of the overall system.

[0029] The working principle of an emergency engine shutdown system for an aircraft refueling truck in this embodiment is as follows:

[0030] When there is no abnormality in the platform anti-collision switch 3 and the generator, the platform anti-collision switch 3 is disconnected, the vehicle starts, the vehicle engine 1 drives the generator 2 to work, the first relay 5 is energized, the alarm 7 circuit is disconnected, the alarm 7 does not work, and the vehicle starts and runs normally.

[0031] When a collision occurs, the platform anti-collision switch 3 closes, the engine shutdown module 4 receives a trigger signal, and the vehicle engine 1 shuts down. After the engine is shut down, the first relay 5 is de-energized, the alarm circuit 7 is connected, and the vehicle power supply 6 flows to the alarm 7 through the normally closed contact of the first relay 5, and the alarm 7 emits an alarm signal.

[0032] When generator 2 malfunctions, the platform anti-collision switch 3 cannot function to shut down the engine ignition module 4. At this time, the first relay 5 is de-energized, and the vehicle power supply 6 is powered on. The vehicle power supply 6 flows to the alarm 7 through the normally closed contact of the first relay 5, and the alarm 7 starts to sound, informing the driver that generator 2 has malfunctioned.

[0033] When the platform anti-collision switch 3 is closed, the vehicle engine 1 shuts down and the generator 2 stops running. If the platform anti-collision switch 3 does not reset after closing, but the vehicle engine 1 is restarted, the generator 2 supplies power to the engine shutdown module 4, triggering a signal that can shut down the vehicle engine 1 again. This prevents the situation in existing emergency shutdown systems where the refueling truck can still start normally, engage the pump, and raise the platform for refueling operations.

[0034] This circuit can alert the driver via alarm 7 when generator 2 malfunctions and engine shutdown module 4 fails to function; it can also urgently stop the equipment from running and prevent the vehicle from restarting if the platform anti-collision switch 3 is closed but not reset.

[0035] Example 2

[0036] This embodiment presents an emergency engine shutdown system for an aircraft refueling truck. Based on Embodiment 1, this embodiment further improves upon the previous one by providing the following improvements: Figure 3 As shown, it also includes a connecting wire 8 and an electrical cabinet terminal block 9. One end of the connecting wire 8 is connected to the platform anti-collision switch 3, and the other end is installed and connected to the electrical cabinet terminal block 9. The connecting wire 8 is electrically connected to the signal input terminal of the engine shutdown module 4 through the electrical cabinet terminal block 9. By setting up the electrical cabinet terminal block 9, it is easy to fix the connecting wire 8, and at the same time, the setting of the electrical cabinet terminal block 9 and the connecting wire 8 facilitates the disassembly and maintenance of the entire emergency shutdown circuit.

[0037] It also includes fuse 10, with its two ends connected in series with generator 2 and platform anti-collision switch 3, respectively. The end of the first relay 5 coil closest to generator 2 is connected in series with fuse 10. By setting fuse 10, the circuit safety can be protected, preventing dangers caused by excessive current. Fuse 10 is set as a 1A fuse. This can control the circuit current within a small range, avoiding dangers caused by excessive current.

[0038] It also includes an emergency shutdown overpass switch 11, whose two ends are connected in series with the generator 2 and the platform anti-collision switch 3, respectively, and one end of the coil of the first relay 5 is connected in series with the emergency shutdown overpass switch 11. By setting the emergency shutdown overpass switch 11, the safety performance of the circuit can be further improved.

[0039] Alarm 7 is a dual-function audible and visual alarm. It provides a clear and noticeable alert to the driver through both sound and light.

[0040] When fuse 10 or emergency shutdown overpass switch 11 malfunctions, similar to when generator 2 malfunctions, platform anti-collision switch 3 cannot function to engine shutdown module 4. At this time, first relay 5 is not energized, vehicle power is supplied and vehicle power supply 6 works. Vehicle power supply 6 flows to alarm 7 through the normally closed contact of first relay 5. Alarm 7 starts to sound, informing the driver that fuse 10 or emergency shutdown overpass switch 11 has malfunctioned.

[0041] Example 3

[0042] This embodiment presents an emergency engine shutdown system for an aircraft refueling truck. Based on Embodiment 1 or Embodiment 2, this embodiment, as follows: Figure 2 and Figure 3 As shown, it also includes a manual emergency stop switch 12, which is connected in parallel with the platform anti-collision switch 3. By setting the manual emergency stop switch 12, the vehicle can be manually shut off on the platform in an emergency, further improving the safety performance of the circuit.

[0043] like Figure 2 and Figure 3 As shown, multiple platform anti-collision switches 3 are provided and connected in parallel. By setting multiple platform anti-collision switches 3, if one platform anti-collision switch 3 fails, the other platform anti-collision switches 3 can still generate a trigger signal to the engine shutdown module 4, thereby improving safety performance.

[0044] like Figure 3As shown, each platform anti-collision switch 3 is connected in series with a unidirectional diode 13, and the other ends of multiple unidirectional diodes 13 are connected in parallel. Each platform anti-collision switch 3 is also connected in series with an LED 14, and the other ends of multiple LEDs 14 are grounded. The LEDs 14 indicate to the driver which platform anti-collision switch 3 triggered the engine shutdown. Markings can be added to the installation locations of the LEDs 14 to help the driver quickly identify the abnormal location. Each LED 14 is connected in series with a resistor 15. By setting the resistor 15, the current flowing through the LED 14 can be controlled, preventing the LED 14 from burning out due to excessive current.

[0045] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An emergency engine shutdown system for an aircraft refueling truck, characterized in that, The system includes a vehicle engine (1), a generator (2), a platform anti-collision switch (3), an engine shutdown module (4), a first relay (5), a vehicle power supply (6), and an alarm (7). The generator (2) is connected to the output terminal of the vehicle engine (1). The generator (2), the platform anti-collision switch (3), and the engine shutdown module (4) are electrically connected in sequence. The engine shutdown module (4) is communicatively connected to the vehicle engine (1). One end of the coil of the first relay (5) is connected in series with the generator (2), and the other end is grounded. The vehicle power supply (6), the normally closed contact of the first relay (5), and the alarm (7) are connected in series in sequence.

2. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that, It also includes a connecting wire (8) and an electrical cabinet terminal block (9); one end of the connecting wire (8) is connected to the platform anti-collision switch (3), and the other end is installed on the electrical cabinet terminal block (9); the connecting wire (8) is electrically connected to the engine shutdown module (4) through the electrical cabinet terminal block (9).

3. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that, It also includes a fuse (10), the two ends of which are connected in series with the generator (2) and the platform anti-collision switch (3), respectively, and the end of the coil of the first relay (5) near the generator (2) is connected in series with the fuse (10).

4. The aircraft refueling truck emergency shutdown system according to claim 3, characterized in that, The fuse (10) is set to 1A fuse.

5. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that, It also includes an emergency shutdown overpass switch (11), the two ends of which are connected in series with the generator (2) and the platform anti-collision switch (3), respectively, and one end of the coil of the first relay (5) is connected in series with the emergency shutdown overpass switch (11).

6. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that, The alarm (7) is set as an audible and visual alarm.

7. The aircraft refueling truck emergency shutdown system according to any one of claims 1 to 6, characterized in that, It also includes a manual emergency shut-off switch (12), which is connected in parallel with the platform anti-collision switch (3).

8. The aircraft refueling truck emergency shutdown system according to any one of claims 1 to 6, characterized in that, The platform anti-collision switch (3) is provided in multiple ways, and the multiple platform anti-collision switches (3) are connected in parallel.

9. The aircraft refueling truck emergency shutdown system according to claim 8, characterized in that, Each of the platform anti-collision switches (3) is connected in series with a unidirectional diode (13), and the other ends of the multiple unidirectional diodes (13) are connected in parallel. Each of the platform anti-collision switches (3) is connected in series with a light-emitting diode (14), and the other ends of the multiple light-emitting diodes (14) are grounded.

10. The aircraft refueling truck emergency shutdown system according to claim 9, characterized in that, Each of the light-emitting diodes (14) is connected in series with a resistor (15).

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