阅读说明：本技术 一种混合动力动车组火灾防控系统 (Fire prevention and control system for hybrid power motor train unit ) 是由 陈广泰 付尧 李争 张越 刘正元 于志航 刘爱群 张敬韬 于 2019-10-21 设计创作，主要内容包括：本发明公开了一种混合动力动车组火灾防控系统,包括：采集单元、冷却降温单元、火灾抑制单元和执行器；所述采集单元,用于采集混合动力动车组的实时温度和火焰探测；所述冷却降温单元,用于根据所述实时温度判断所述混合动力动车组是否需要冷却降温,若是,则向执行器发送冷却指令；所述火灾抑制单元,用于根据所述实时火焰探测判断所述混合动力动车组是否需要火灾抑制,若是,则向执行器发送灭火指令。本发明火灾防控系统对动车组中动力包和动力电池进行分级保护,包括冷却降温单元、火灾抑制单元两部分。实现了在明火之前加以抑制,尽量避免明火发生,进而提高了动力系统的安全性。(The invention discloses a fire prevention and control system for a hybrid power motor train unit, which comprises: the system comprises a collecting unit, a cooling unit, a fire suppression unit and an actuator; the acquisition unit is used for acquiring real-time temperature and flame detection of the hybrid power motor train unit; the cooling unit is used for judging whether the hybrid power motor train unit needs cooling according to the real-time temperature, and if so, sending a cooling instruction to the actuator; and the fire suppression unit is used for judging whether the hybrid power motor train unit needs fire suppression according to the real-time flame detection, and if so, sending a fire extinguishing instruction to the actuator. The fire prevention and control system carries out graded protection on the power pack and the power battery in the motor train unit and comprises a cooling unit and a fire suppression unit. The suppression is realized before the open fire, the open fire is avoided as much as possible, and the safety of the power system is further improved.)

1. The utility model provides a hybrid EMUs conflagration prevention and control system which characterized in that includes:

the system comprises a collecting unit, a cooling unit, a fire suppression unit and an actuator;

the acquisition unit is used for acquiring real-time temperature and flame detection of the hybrid power motor train unit;

the cooling unit is used for judging whether the hybrid power motor train unit needs cooling according to the real-time temperature, and if so, sending a cooling instruction to the actuator;

and the fire suppression unit is used for judging whether the hybrid power motor train unit needs fire suppression according to the real-time flame detection, and if so, sending a fire extinguishing instruction to the actuator.

2. The system of claim 1, further comprising:

and the alarm unit is used for receiving the fire alarm signal sent by the fire suppression unit and carrying out fire alarm.

3. The system of claim 1, wherein the cooling unit is specifically configured to:

using a formula

T_{Protection of}＝T_{Out of control}-5℃

Calculating protection temperature, and if the real-time temperature is greater than the protection temperature, sending a starting signal to a cooling steel cylinder, wherein T is_{Protection of}To protect the temperature, T_{Out of control}Is a runaway temperature.

4. The system of claim 2, wherein the cooling unit is further specifically configured to:

calculating the change rate of the real-time temperature according to the time corresponding to the real-time temperature;

and judging whether the change rate is greater than a threshold value, if so, sending a communication fault signal to an alarm unit, and performing fault alarm.

5. The system of claim 1, wherein the fire suppression unit is further configured to:

before sending the fire extinguishing instruction to the actuator, sending an instruction of closing the air inlet fan to the actuator, and sending an instruction of closing the air outlet fan to the actuator after the threshold time.

6. The system of claim 1, further comprising:

and the acquisition optimization unit is used for adjusting the position of the acquisition unit according to the area of the monitored flame by adopting a virtual camera mode through the installation position of the acquisition unit.

7. The system of claim 1, wherein the acquisition unit comprises: temperature sensor, smoke temperature composite detector and flame detector.

Technical Field

The invention relates to the technical field of locomotive fire prevention, in particular to a fire prevention and control system for a hybrid power motor train unit.

Background

With the development of the technology, a power system of a high-speed railway is gradually changed from a power pack (a diesel engine, a main generator and a controller) diesel single power system into a power pack and a power battery oil-electricity hybrid power system, and the application of the high-speed railway technology is mature day by day. People enjoy the convenience brought by high-speed railways and have higher and higher requirements on the safety performance of the high-speed railways. In 2018, 25 months 1, G281 trains from Qingdao to Hangzhou east have electrical faults, the fault point is a traction converter, and the faults cause fire disasters to cause 6 times of train shutdown on Jinghushi high-speed rails.

The power system of the motor train unit is a very large system, and although the reliability of the power system is higher than that of other parts, because the power system has high energy density, once a fire accident occurs, if the fire accident is not inhibited, the fire accident must be spread into a fire which can cause mechanical damage or even casualties, and therefore the power system on the motor train unit should be used as a key protection object of the fire accident. However, the fire detection, parking and personnel evacuation safety modes are adopted for the fire of a power system on a motor train unit before, fire suppression equipment is not provided, the fire can be suppressed only after a fire brigade arrives, due to the fact that the fire accident occurrence places are random, the mode possibly causes that the fire suppression time is delayed greatly, small fire is developed into big fire, not only is the damage of the whole motor train serious, but also the dosage of fire extinguishing agents required for completely suppressing the fire is increased in a geometric progression along with the delay of the fire extinguishing intervention time.

Disclosure of Invention

The invention provides a fire prevention and control system for a hybrid electric multiple unit, which aims to overcome the technical problems.

The invention discloses a fire prevention and control system of a hybrid power motor train unit, which comprises:

the system comprises a collecting unit, a cooling unit, a fire suppression unit and an actuator;

the acquisition unit is used for acquiring real-time temperature and flame detection of the hybrid power motor train unit;

the cooling unit is used for judging whether the hybrid power motor train unit needs cooling according to the real-time temperature, and if so, sending a cooling instruction to the actuator;

and the fire suppression unit is used for judging whether the hybrid power motor train unit needs fire suppression according to the real-time flame detection, and if so, sending a fire extinguishing instruction to the actuator.

Further, still include:

and the alarm unit is used for receiving the fire alarm signal sent by the fire suppression unit and carrying out fire alarm.

Further, the cooling unit is specifically configured to:

using a formula

T_{Protection of}＝T_{Out of control}-5℃

Calculating protection temperature, and if the real-time temperature is greater than the protection temperature, sending a starting signal to a cooling steel cylinder, wherein T is_{Protection of}To protect the temperature, T_{Out of control}Is a runaway temperature.

Further, the cooling unit is further specifically configured to:

calculating the change rate of the real-time temperature according to the time corresponding to the real-time temperature;

and judging whether the change rate is greater than a threshold value, if so, sending a communication fault signal to an alarm unit, and performing fault alarm.

Further, the fire suppression unit is further configured to:

before sending the fire extinguishing instruction to the actuator, sending an instruction of closing the air inlet fan to the actuator, and sending an instruction of closing the air outlet fan to the actuator after the threshold time.

Further, still include:

and the acquisition optimization unit is used for adjusting the position of the acquisition unit according to the area of the monitored flame by adopting a virtual camera mode through the installation position of the acquisition unit.

Further, the acquisition unit includes: temperature sensor, smoke temperature composite detector and flame detector.

The fire prevention and control system carries out graded protection on the power pack and the power battery in the motor train unit and comprises a cooling unit and a fire suppression unit. The suppression is realized before the open fire, the open fire is avoided as much as possible, and the safety of the power system is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a fire prevention and control system of a hybrid electric multiple unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a fire prevention and control system of a hybrid electric multiple unit according to the present invention, and as shown in fig. 1, the system of the present embodiment may include:

the system comprises a collecting unit 101, a cooling unit 102, a fire suppression unit 103 and an actuator 104;

the acquisition unit is used for acquiring real-time temperature and flame detection of the hybrid power motor train unit;

the cooling unit is used for judging whether the hybrid power motor train unit needs cooling according to the real-time temperature, and if so, sending a cooling instruction to the actuator;

and the fire suppression unit is used for judging whether the hybrid power motor train unit needs fire suppression according to the real-time flame detection, and if so, sending a fire extinguishing instruction to the actuator.

Further, still include:

and an alarm unit 105 for receiving the fire alarm signal transmitted from the fire suppression unit and performing a fire alarm.

Specifically, the fire prevention and control system of the embodiment protects the power pack and the power battery in the motor train unit: a cooling unit and a fire suppression unit. Further, the acquisition unit includes: temperature sensor, smoke temperature composite detector and flame detector. The actuator mainly comprises a coolant 106/fire extinguishing agent 107 storage steel cylinder, a cylinder head valve, an electromagnetic valve, a manual valve, a pipeline and a spray head.

The cooling and cooling unit firstly heats a test object (a battery/power pack) to find a temperature point when a research object generates an open fire or smoke, the temperature point is defined as an out-of-control temperature point and is an important reference of a working point of the coolant steel cylinder, and the temperature of a protection point is adjusted back because a time difference exists between an alarm signal with overhigh temperature and an action signal of the coolant storage steel cylinder, so that a formula is adopted

T_{Protection of}＝T_{Out of control}-5℃

Calculating a protection temperature, wherein T_{Protection of}To protect the temperature, T_{Out of control}Is a runaway temperature.

This embodiment is generally applicableThe TCMS acquires temperature data in the temperature sensor, and when the acquisition unit monitors real-time temperature data, the temperature sampling period in this embodiment is 1 s. The temperature data acquired in 5 continuous periods are all larger than T_{Protection of}When the device is used, the controller sends out a coolant steel cylinder action signal, and the coolant is sprayed out to cool the device.

And the fire suppression unit determines that the fire really occurs if a fire alarm signal is continuously sent to the alarm unit for 20 times according to real-time flame detection, otherwise, the fire suppression unit judges that the fire is misinformed and recalculates the continuous alarm times. If the fire disaster is judged to be really happening, the valve of the fire extinguishing agent storage steel cylinder is controlled to be opened, and the fire extinguishing agent is released on the surface of the power pack through the pipeline and the spray head. Meanwhile, the controller informs a driver to stop and evacuate people through the sound-light alarm device.

Further, the cooling unit is further specifically configured to:

calculating the change rate of the real-time temperature according to the time corresponding to the real-time temperature;

and judging whether the change rate is greater than a threshold value, if so, sending a communication fault signal to an alarm unit, and performing fault alarm.

Specifically, because the number of batteries in a battery box of the motor train unit is large, temperature data needing to be collected is large, in order to prevent communication abnormality caused by communication faults and further cause error spraying of a coolant steel cylinder, a prevention and control system controller is added with calculation of a temperature change rate in the aspect of software, and if the temperature is suddenly higher than T_{Protection of}If the temperature rising slope is larger than 5 ℃/s, the communication fault is determined, the data collected by the channel is bad data, and the prevention and control system controller sends suggestion information to the TCMS: if the temperature collection is inaccurate, the related collection equipment is recommended to be checked/replaced;

further, the fire suppression unit is further configured to:

before sending the fire extinguishing instruction to the actuator, sending an instruction of closing the air inlet fan to the actuator, and sending an instruction of closing the air outlet fan to the actuator after the threshold time.

Specifically, the fans 108 are linked to suppress a fire: in the controller software of the fire prevention and control system, a plurality of variables are defined, which respectively represent a fire alarm signal variable m _ fire _ alarm, an inlet air fan control variable m _ inlet _ fan _ ctrl, an outlet air fan control variable m _ outlet _ fan _ ctrl and a fan rotating speed feedback variable m _ fan _ rotation _ rate, and once the signal is generated for 10 times continuously, the fire is determined to occur. Because power equipment generally disposes simultaneously into wind fan and air-out fan, the event closes the fan of intaking at first, guarantees that oxygen no longer gushes into protective apparatus in a large number, controls the intensity of a fire, simultaneously, because air-out fan continuously works, takes the air in the protective apparatus out of the equipment, forms certain negative pressure in the equipment. After 2s, the air outlet fan is closed simultaneously, and the fire extinguishing agent is released rapidly after 1s, so that the fire extinguishing agent is ensured to be rapidly filled into the whole protection area under the action of space negative pressure, and the concentration of the fire extinguishing agent is indirectly increased due to the reduction of air. In this patent, the opening and the closed control of fan have two modes: a. the fire prevention and control system controller transmits a fire signal to the TCMS, and the TCMS generates a control signal to control the closing of the fan after internal logic processing. This is the preferred mode, can guarantee that equipment fan control unit only has one. b. A circuit breaker is added in a power supply circuit of the fan, and the on-off of the circuit breaker is directly controlled by a fire prevention and control system controller. This mode is a secondary mode, and is used as a redundant control mode of the former mode: after the TCMS gives out a fan control signal, if the fan speed feedback does not decrease, the communication loop is regarded as a fault in the first mode, and the second mode is needed to intervene to control the fan to be closed. The two redundancy modes obviously improve the reliability of fan control. Therefore, in the fire extinguishing process, the fire extinguishing efficiency can be obviously improved by controlling the fans of the power system to stop working, and the product safety is further improved.

Further, still include:

and the acquisition optimization unit is used for adjusting the position of the acquisition unit according to the area of the monitored flame by adopting a virtual camera mode through the installation position of the acquisition unit.

Particularly, because flame detector surveys ultraviolet radiation, the test procedure discovery, and middle sheltering from can produce great influence to the testing result, so this system is in the design process, optimizes flame detector position through the mode of erectting virtual camera in the model: in the virtual camera tab, the focal length and the visual angle of the camera are set according to the actual parameters of the flame detector, the distance parameters are visualized, the virtual flame model is added into the three-dimensional model, the position of the flame detector is adjusted to observe the shielding condition of the flame model in the product, and the position of the detector is optimized. Compared with the traditional mode of manually adjusting the position in the installation stage and observing the detection effect in real time, the method obviously shortens the research and development time and reduces the labor cost to a certain extent.

The position optimization of the detector needs to be considered, because the protection equipment is provided with the fan mounting hole and the fan, the IP grade (waterproof and dustproof grade) of the equipment is not high, dust is easily accumulated in the equipment, a lens of the flame detector is shielded, the observation effect of the flame detector is influenced, the ash removal treatment of the flame detector needs to be carried out regularly, and the flame detector needs to be arranged on a maintenance surface and is convenient to operate and maintain.

Due to design defects, the temperature of some areas inside power batteries and power packs in the motor train unit is high for a long time, and compared with other positions, the areas are easy to cause fire, and defined as fire key protection areas. Aiming at the area, more than two flame detectors are erected from different angles, so that redundant detection of fire is realized, and the condition that the fire is missed to report due to communication faults and other reasons is prevented.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.