Fire fighting systems and fire trucks

Abstract

The embodiment of the present application provides a fire protection system, which is applied to the foam pump of a fire truck, including: a first generator connected across the two ends of a servo drive group; a second generator connected across the two ends of the servo drive group; a servo drive group, one end of which is electrically connected to the output ends of the two generators and the other end is grounded; a battery connected across the two ends of the servo drive group; wherein, when the first generator and the second generator simultaneously power the servo drive group, the servo drive group provides at least 14kw of power output for driving the foam pump. The fire protection system in the present application is powered by dual generators, and has the effects of high reliability, continuous power supply, load balancing, and strong system fault tolerance. The present application can provide at least 14kw of power output for driving the foam pump, ensure power demand, reduce the probability of foam supply interruption during fire fighting operations of fire trucks, and ensure the smooth and efficient development of fire rescue work.

Description

Technical Field

[0001] The present application relates to the technical field of fire protection engineering, and in particular to a fire protection system and a fire truck. Background Art

[0002] At present, fire trucks usually include fire foam trucks. The foam supply circuit is driven by the on-board 24V power supply system. In order to pursue better fire fighting effects, when the fire truck is equipped with an ultra-large flow CAFS system, the foam liquid supply needs to be larger and the required power is also greater.

[0003] However, due to the capacity limitations of the current on-board generator system and battery system, when performing firefighting work, the power supply controlled by the foam pump or pump group cannot meet the power requirements of the pump group working at large flow or full load. This may easily cause interruptions in the foam supply during the firefighting process, affecting the smooth development of firefighting and rescue work. Summary of the invention

[0004] The embodiments of the present application provide a fire protection system to solve or alleviate one or more technical problems in the prior art.

[0005] As one aspect of an embodiment of the present application, an embodiment of the present application provides a fire fighting system, which is applied to a foam pump of a fire fighting truck. The fire fighting system includes a first generator, a second generator, and a servo drive group; wherein,

[0006] The first generator is connected across two ends of the servo drive group;

[0007] The second generator is connected across two ends of the servo drive group;

[0008] A servo drive group, one end of which is electrically connected to the output end of the first generator and the output end of the second generator respectively, and the other end of which is grounded;

[0009] Wherein, when the first generator and the second generator supply power to the servo drive group at the same time, the servo drive group provides at least 14kw of power output for driving the foam pump.

[0010] Optionally, the first generator and the second generator have the same power generation capacity.

[0011] Optionally, the fire protection system further comprises:

[0012] A first switch is electrically connected between the first generator and the servo drive group; and / or

[0013] The second switch is electrically connected between the second generator and the servo drive group.

[0014] Optionally, the fire protection system further comprises a battery, a first anti-reverse diode, and a second anti-reverse diode;

[0015] A first end commonly connected to the first generator, the second generator and the servo drive group is electrically connected to the positive electrode of the battery;

[0016] The second end commonly connected to the first generator, the second generator and the servo drive group is electrically connected to the negative electrode of the battery;

[0017] The first anti-reverse diode is connected between the first generator and the battery, and is used to prevent the current of the battery from being output to the first generator;

[0018] The second anti-reverse diode is connected between the second generator and the battery, and is used to prevent the current of the battery from being output to the second generator.

[0019] Optionally, the total power generation of the first generator and the second generator is greater than the total required power of the servo drive group;

[0020] The excess power generated by the first generator and the second generator is used to charge the battery.

[0021] Optionally, the battery is connected across two ends of the servo drive group, and when the battery is in a discharged state, it is used to drive the foam pump.

[0022] Optionally, the fire fighting system further comprises a coulometer;

[0023] The first end of the coulomb meter is connected to the positive electrode of the battery, and the second end of the coulomb meter is connected to the negative electrode of the battery.

[0024] Optionally, the servo drive group includes a first servo motor, a second servo motor, a third servo motor and a fourth servo motor connected in parallel in sequence.

[0025] Optionally, the power of the first servo motor, the power of the second servo motor, and the power of the third servo motor are all greater than the power of the fourth servo motor.

[0026] As another aspect of the embodiment of the present application, the embodiment of the present application also provides a fire truck, comprising any fire fighting system described above.

[0027] The fire protection system in this application is powered by dual generators, which has the following advantages:

[0028] ① High reliability: The dual generator system can provide redundancy. Even if one of the generators fails, the system can continue to supply power. This redundant design ensures the stability and reliability of power supply.

[0029] ②Continuous power supply: Even when one generator is under maintenance or fails, the other generator can still provide power to ensure that the system is not interrupted.

[0030] ③ Load balancing: The dual generator system can better balance the load. When the load changes greatly, the two generators can supply power together as needed to avoid overloading a single generator.

[0031] ④The system has strong fault tolerance: when a generator fails, the system can still continue to supply power, reducing the risk of system interruption.

[0032] ⑤ Provide at least 14kw power output to drive the foam pump to ensure power demand and reduce the probability of foam supply interruption in fire protection projects.

[0033] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0035] Figure 1 A schematic diagram of a fire protection system according to an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 11. First generator; 12. Second generator; 20. Servo drive group; 201. First servo motor; 202. Second servo motor; 203. Third servo motor; 204. Fourth servo motor; 31. First switch; 32. Second switch; 40. Battery; 51. First anti-reverse diode; 52. Second anti-reverse diode; 60. Coulomb meter. DETAILED DESCRIPTION

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0039] See also Figure 1 An embodiment of the present application provides a fire fighting system applied to a foam pump of a fire truck. The fire fighting system includes: a first generator 11, a second generator 12, and a servo drive group 20, which are described in detail below.

[0040] The first generator 11 is connected across the two ends of the servo drive group 20;

[0041] The second generator 12 is connected across the two ends of the servo drive group 20;

[0042] A servo drive group 20, one end of which is electrically connected to the output end of the first generator 11 and the output end of the second generator 12, and the other end of which is grounded;

[0043] Wherein, when the first generator 11 and the second generator 12 supply power to the servo driver group 20 at the same time, the servo driver group 20 provides at least 14kw of power output for driving the foam pump.

[0044] The fire protection system in this application is powered by dual generators, which has the following advantages:

[0045] ① High reliability: The dual generator system can provide redundancy. Even if one of the generators fails, the system can continue to supply power. This redundant design ensures the stability and reliability of power supply.

[0046] ②Continuous power supply: Even when one generator is under maintenance or fails, the other generator can still provide power to ensure that the system is not interrupted.

[0047] ③ Load balancing: The dual generator system can better balance the load. When the load changes greatly, the two generators can supply power together as needed to avoid overloading a single generator.

[0048] ④The system has strong fault tolerance: when a generator fails, the system can still continue to supply power, reducing the risk of system interruption.

[0049] ⑤ Provide at least 14kw power output to drive the foam pump to ensure power demand and reduce the probability of foam supply interruption in fire protection projects.

[0050] In an optional embodiment, the power generation capacity of the first generator 11 and the second generator 12 is the same.

[0051] Two generators of equal power provide backup capacity. If one generator requires maintenance or fails, the other can take over and keep the system running.

[0052] In the case of large load changes, the two generators can share the load and avoid overloading of a single generator, thereby extending the life of the equipment and ensuring stable operation.

[0053] When one generator fails, the other generator can take over the power supply, reducing the risk of system interruption and improving the system's fault tolerance and reliability. In addition, two generators with the same power can better balance the load of the power grid, helping to optimize power distribution and stabilize power supply.

[0054] Specifically, the configurations of the first generator 11 and the second generator 12 may both be 48V, 150A.

[0055] In an optional embodiment, the fire protection system further comprises:

[0056] A first switch 31 is electrically connected between the first generator 11 and the servo drive group 20; and / or

[0057] The second switch 32 is electrically connected between the second generator 12 and the servo drive group 20. By setting the corresponding switch for the generator, the switch can be used to specifically control the opening or closing of a generator to facilitate firefighting and rescue work in different situations. For example, when the fire is small and the amount of foam liquid supplied is small, the switch can be used to control the start of a single generator to reduce energy consumption while ensuring that the firefighting needs are met.

[0058] When both generators are running and one of them needs maintenance, the generator that needs maintenance can be turned off individually by using a switch. After the generator is replaced, the switch can be closed again, avoiding the situation where the firefighting project needs to be completely stopped when replacing the generator during firefighting and rescue work.

[0059] In an optional embodiment, the fire protection system further includes a battery 40, a first anti-reverse diode 51, and a second anti-reverse diode 52;

[0060] The first end commonly connected to the first generator 11, the second generator 12 and the servo drive group 20 is electrically connected to the positive electrode of the battery 40;

[0061] The second end commonly connected to the first generator 11, the second generator 12 and the servo drive group 20 is electrically connected to the negative electrode of the battery 40;

[0062] The first anti-reverse diode 51 is connected between the first generator 11 and the battery 40 to prevent the current of the battery 40 from being output to the first generator 11;

[0063] The second anti-reverse diode 52 is connected between the second generator 12 and the battery 40 to prevent the current of the battery 40 from being output to the second generator 12 .

[0064] The storage battery 40 can be used as a backup power source to supply power to the foam pump when the generator stops supplying power.

[0065] The battery 40 can provide continuous power output when the generator stops running, ensuring that the system will not be interrupted. In emergencies, such as generator failure or shutdown, the battery 40 can immediately take over the power supply to avoid losses caused by power outages. It can also avoid situations where the generator is unavailable and the fire protection project cannot be carried out normally.

[0066] In the case where the generator stops working, the continuous power supply of the battery 40 can protect the equipment from damage that may be caused by sudden power outages, especially for some equipment that has a high requirement for a stable power supply.

[0067] As a backup power source, the battery 40 does not require startup time, can respond quickly and provide power support, and can supplement power supply more quickly than a generator.

[0068] In other embodiments, an automatic switching mechanism may be designed in the system so that when the generator stops working, the battery 40 automatically takes over the power supply to ensure a smooth transition of power supply and reduce the impact on the equipment and system.

[0069] Specifically, the supply voltage of the battery 40 may be 48V.

[0070] In other embodiments, when the battery 40 is fully charged, the battery 40 and the two generators can simultaneously power the foam pump when performing firefighting projects. The battery 40 can quickly respond to load changes, and the two generators provide continuous power support. If one generator stops working for some reason, the battery 40 can temporarily maintain power supply to ensure uninterrupted operation of the system.

[0071] The battery 40 can provide support when more power is needed instantaneously, reducing the sudden demand on the generator, thereby reducing the possibility of overloading the generator.

[0072] Firefighting projects often deal with various emergencies. In some cases, instantaneous high power output may be required. The battery 40 can quickly provide power before the generator starts to cope with such transient demands and ensure the stability of system operation.

[0073] In addition, when the load is low, the battery 40 can be used to supply power, so that the generator is in a low load or no-load state. This helps to reduce fuel consumption, reduce wear of the generator, and improve the energy utilization of the entire system.

[0074] Further, in this embodiment, the total power generated by the first generator 11 and the second generator 12 is greater than the total required power of the servo drive group 20;

[0075] The excess power generated by the first generator 11 and the second generator 12 is used to charge the battery 40 .

[0076] Specifically, the first generator 11 and the second generator 12 are both configured with 48V, 150A to power the servo drive group 20 , the power requirement of the servo drive group 20 is at least 8600W, and the excess power generated by the first generator 11 and the second generator 12 is used to charge the battery 40 .

[0077] The surplus electricity is used to charge the storage battery 40, so that even when the load demand is not high, the electricity generated by the generator can be fully utilized to charge the storage battery 40, thereby improving the backup capacity.

[0078] Continuously charging the battery 40 through the generator helps to maintain the charging state of the battery 40 , avoids the battery 40 from being damaged due to being in a long-term discharge state, and helps to extend the life of the battery 40 .

[0079] The fully charged battery 40 can be used as a backup power source. When the generator stops working or fails, the battery 40 can provide continuous power supply to ensure that the system is not interrupted.

[0080] In an optional applicable embodiment, the battery 40 is connected across the two ends of the servo drive group 20, and when the battery 40 is in a discharged state, it is used to drive the foam pump.

[0081] In an optional embodiment, the fire fighting system further comprises a coulometer 60;

[0082] A first end of the coulomb counter 60 is connected to the positive electrode of the battery 40 , and a second end of the coulomb counter 60 is connected to the negative electrode of the battery 40 .

[0083] That is, the coulomb meter 60 is connected in parallel with the battery 40, and the charge state and changes of the battery 40 can be monitored by connecting the coulomb meter 60 in parallel. This helps to understand the charge and discharge conditions of the battery 40, as well as the rate of charge change and the battery state (e.g., charging, discharging, or remaining battery capacity).

[0084] The performance of the battery can be evaluated by monitoring the change in the charge amount of the battery 40. For example, during charging, the coulomb counter 60 can record the amount of charge received by the battery 40 to evaluate the charging efficiency and charging speed of the battery 40.

[0085] The coulomb counter 60 can also be used to monitor the charge level so that the battery 40 automatically stops charging when the predetermined charge level is reached to avoid overcharging or undercharging.

[0086] In addition, by monitoring the charge changes during the charging and discharging process of the battery 40, the health status and life of the battery 40 can be evaluated, and the battery degradation or damage can be discovered in advance.

[0087] In an optional embodiment, the servo drive group 20 includes a first servo motor 201, a second servo motor 202, a third servo motor 203 and a fourth servo motor 204 which are sequentially connected in parallel.

[0088] Four servo motors connected in parallel can share the load and share the load pressure of a single motor, thereby improving the load capacity of the system and reducing the risk of overloading a single motor.

[0089] Four servo motors in parallel can provide backup and redundancy. Even if one of the servo motors fails or requires maintenance, the other servo motors can continue to work to drive the foam pump, avoiding interruption of firefighting projects.

[0090] Further, in this embodiment, the power of the first servo motor 201 , the power of the second servo motor 202 , and the power of the third servo motor 203 are all greater than the power of the fourth servo motor 204 .

[0091] Specifically, in this embodiment, the first generator 11 and the second generator 12 are both configured with 48V and 150A.

[0092] The power of the first servo motor 201 , the second servo motor 202 , and the third servo motor 203 are all 2350 W. The power of the fourth servo motor 204 is 1550 W.

[0093] When the first generator 11 and the second generator 12 are started, they will give priority to supplying power to three 2350w servo motors (maximum current 59A / each) and one 1550w servo motor (maximum current 40A) to work, and the remaining power will be used to charge the 48V battery pack.

[0094] There are four foam pumps, three of which are 40L / min foam pumps and the other is a 20L / min foam pump.

[0095] The 2350w motor drives a 40L / min foam pump, and the 1550w motor drives a 20L / min foam pump.

[0096] The two generators preferentially supply power to multiple servo motors to meet the power requirements when driving the foam pump. At the same time, charging the battery pack can stably provide power to the foam pump when it is working, solving the need for large current of servo drive of multiple pump groups.

[0097] The first servo motor 201, the second servo motor 202, and the third servo motor 203 drive the foam pump with a large flow rate, and the fourth servo motor 204 drives the foam pump with a small flow rate. When the demand is not high, only one pump can be operated to save energy and reduce wear, and when a greater pumping capacity is required, two pumps are operated at the same time to increase the flexibility of firefighting and rescue work in different situations.

[0098] An embodiment of the present application also provides a fire truck, comprising the fire fighting system described in any one of the above embodiments.

[0099] Specifically, the fire truck in this embodiment is equipped with an ultra-large flow CAFS system.

[0100] The other components of the fire fighting system and the fire fighting vehicle in the above-mentioned embodiment may adopt various technical solutions known to ordinary technicians in this field now and in the future, and will not be described in detail here.

[0101] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0102] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0103] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0104] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0105] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself.

[0106] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fire fighting system, characterized in that: A foam pump applied to a fire truck, the fire fighting system comprises a first generator, a second generator, and a servo drive group; wherein, The first generator is connected across two ends of the servo drive group; The second generator is connected across two ends of the servo drive group; A servo drive group, one end of which is electrically connected to the output end of the first generator and the output end of the second generator respectively, and the other end of which is grounded; Wherein, when the first generator and the second generator supply power to the servo drive group at the same time, the servo drive group provides at least 14kw of power output for driving the foam pump; Wherein, the fire protection system further comprises a battery, a first anti-reverse diode, and a second anti-reverse diode; A first end commonly connected to the first generator, the second generator and the servo drive group is electrically connected to the positive electrode of the battery; The second end commonly connected to the first generator, the second generator and the servo drive group is electrically connected to the negative electrode of the battery; The first anti-reverse diode is connected between the first generator and the battery, and is used to prevent the current of the battery from being output to the first generator; The second anti-reverse diode is connected between the second generator and the battery, and is used to prevent the current of the battery from being output to the second generator; Wherein, the total power generation of the first generator and the second generator is greater than the total required power of the servo drive group; The excess power generated by the first generator and the second generator is used to charge the battery; The power generation capacity of the first generator and the second generator is the same.

2. The fire fighting system according to claim 1, characterized in that: The fire protection system also includes: A first switch is electrically connected between the first generator and the servo drive group; and / or The second switch is electrically connected between the second generator and the servo drive group.

3. The fire fighting system according to claim 1, characterized in that: The storage battery is connected across the two ends of the servo drive group, and when the storage battery is in a discharged state, it is used to drive the foam pump.

4. The fire fighting system according to any one of claims 1 to 2, characterized in that: The fire fighting system further comprises a coulometer; The first end of the coulomb meter is connected to the positive electrode of the battery, and the second end of the coulomb meter is connected to the negative electrode of the battery.

5. The fire fighting system according to any one of claims 1 to 2, characterized in that: The servo drive group comprises a first servo motor, a second servo motor, a third servo motor and a fourth servo motor which are sequentially connected in parallel.

6. The fire fighting system according to claim 5, characterized in that: The power of the first servo motor, the power of the second servo motor, and the power of the third servo motor are all greater than the power of the fourth servo motor.

7. A fire truck, characterized in that: A fire fighting system comprising any one of claims 1 to 6.

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