A hybrid power driving system and method with fire-fighting function

Abstract

The application discloses a kind of hybrid power drive system and method with fire-fighting function, the system includes liquefied gas storage tank, pressure reducing valve, heater, machine case, battery and vent line group;Liquefied gas storage tank's inlet and outlet are respectively provided with liquefied gas inflow pipe and vent line group, vent line group includes with the first vent line of liquefied gas storage tank, pressure reducing valve and heater are set on the first vent line, pressure reducing valve and heater are used to change liquefied gas into high-pressure fire-retardant gas, double power motor is provided in machine case, double power motor includes pneumatic motor and electric motor, at least one fire extinguishing line group for fire extinguishing is connected on the second vent line, the end of fire extinguishing line group away from the second vent line is provided with the joint for accessing external gas pipe.The high-pressure fire-retardant gas generated by the application not only can realize the function of hybrid power drive in cooperation with battery, but also can realize the function of rapid fire extinguishing through the fire extinguishing line group set in emergency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power engineering, in particular to a hybrid power driving system and method with fire-fighting function. BACKGROUND

[0002] At present, hybrid electric vehicles need to use high-energy batteries, and each kilogram of high-energy batteries can only store 260Wh, so the energy storage density is low, and therefore the high-energy batteries need to be charged frequently. The charging time is long, and there is a risk of thermal runaway of the battery and the motor during the charging process and the battery power supply process, so an expensive thermal management system needs to be equipped, thereby increasing the complexity of the system, increasing the probability of failure and the difficulty of maintenance. In addition, due to the storage of compressed gas, the storage capacity of the traditional steel cylinder is limited, and it needs to be frequently replaced or inflated. The current compressed gas power locomotive uses traditional high-pressure tanks and pneumatic motors, and the pneumatic motor generally has high efficiency in the 50% to 80% interval of the idle speed, so the efficiency is low when the vehicle is running at low speed. In addition, due to the small amount of compressed gas stored in the high-pressure tank, the weight of the high-pressure tank is large, resulting in short endurance time and low practicability.

[0003] Therefore, there is an urgent need to propose a new scheme to solve the above problems. SUMMARY

[0004] The present application provides a hybrid power driving system and method with fire-fighting function to solve the problems of low use efficiency of compressed gas and short endurance time in the prior art.

[0005] The present application provides a hybrid power driving system with fire-fighting function, which comprises a liquefied gas storage tank, a pressure reducing valve, a heater, a machine box, a storage battery and a ventilation pipeline group.

[0006] The inlet and outlet of the liquefied gas storage tank are respectively provided with a liquefied gas inflow pipe and a ventilation pipeline group, the ventilation pipeline group comprises a first ventilation pipeline connected to the liquefied gas storage tank, and the pressure reducing valve and the heater are arranged on the first ventilation pipeline, and the pressure reducing valve and the heater are used to change the liquefied gas into high-pressure fire-retardant gas.

[0007] The machine box is provided with a dual-power motor, the dual-power motor comprises a pneumatic motor and an electric motor, the first ventilation pipeline is connected to the pneumatic motor through a second ventilation pipeline, the pneumatic motor is driven by the high-pressure fire-retardant gas, and the electric motor is driven by the storage battery.

[0008] At least one fire extinguishing pipeline group for extinguishing fire is connected to the second ventilation pipeline, and the fire extinguishing pipeline group is provided with a connector for connecting an external air pipe at an end away from the second ventilation pipeline.

[0009] Further, the cabinet further comprises a power recovery device, a power output shaft and a power bearing, the power recovery device is connected with the double-power motor through the power output shaft, and the power output shaft is supported by the power bearing.

[0010] Further, the liquefied gas storage tank is provided with a temperature sensor and a pressure sensor, the liquefied gas storage tank is provided with a circulating cooling system matched with the temperature sensor, and the top of the liquefied gas storage tank is provided with a pressure relief valve electrically connected with the pressure sensor.

[0011] Further, the circulating cooling system comprises a cooling liquid tank, a cooling liquid inlet pipe, a cooling liquid outlet pipe and an in-tank cooling pipe, and the liquid in the liquefied gas storage tank is circulated and cooled through the in-tank cooling pipe.

[0012] Further, the second air pipe is provided with a first three-way valve, the third end of the first three-way valve is communicated with a fourth air pipe, the outlet of the pneumatic motor is communicated with a third air pipe, the third air pipe and the fourth air pipe are communicated with a fifth air pipe through an intermediate third three-way valve, and the end of the fifth air pipe away from the third three-way valve is provided with a first fire-fighting connector connected with an external air pipe.

[0013] Further, the second air pipe is provided with a second three-way valve, the third end of the second three-way valve is communicated with a sixth air pipe, the end of the sixth air pipe away from the second three-way valve is provided with a second fire-fighting connector connected with an external air pipe, and the sixth air pipe is provided with an electrically-operated on-off valve.

[0014] Further, the liquefied gas inflow pipe is provided with a liquid filling valve and a one-way valve.

[0015] The application provides a hybrid power driving method with fire-fighting function, comprising the following steps.

[0016] When the vehicle speed is less than or equal to V1, the double-power motor is provided with all power by the storage battery;

[0017] When the vehicle speed is between V1 and V2, the pressure reduction ratio of the pressure relief valve is set to N1, the liquefied gas is gasified into high-pressure fire-retardant gas through the pressure relief valve and the heater, and then is discharged through the first air pipe, the second air pipe, the pneumatic motor, the third air pipe and the fifth air pipe in sequence, at this time, the double-power motor is provided with part of power by the storage battery;

[0018] When the vehicle speed is greater than or equal to V2, the pressure reduction ratio of the pressure relief valve is set to N2, wherein N2 < N1, and the double-power motor is provided with all power by the high-pressure fire-retardant gas gasified through the pressure relief valve and the heater.

[0019] The embodiment also includes opening the pressure reducing valve and the heater when an external fire occurs, and connecting part of the high-pressure fire-retardant gas to the first fire-fighting connector through the fourth gas pipeline, the third three-way valve and the fifth gas pipeline by adjusting the first three-way valve and the second three-way valve, and connecting another part of the high-pressure fire-retardant gas to the second fire-fighting connector through the second gas pipeline, the second three-way valve and the sixth gas pipeline, and then connecting the first fire-fighting connector and the second fire-fighting connector to the external gas pipeline for fire extinguishing.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] 1. The hybrid power driving and fire extinguishing system of the application converts the liquefied gas in the liquefied gas storage tank into gaseous high-pressure fire-retardant gas through the pressure reducing valve and the heater, the generated high-pressure fire-retardant gas can not only realize the function of hybrid power driving in cooperation with the battery, but also realize the function of rapid fire extinguishing through the set fire extinguishing pipeline group in emergency, and the heat in the system is taken away by the compressed liquefied gas to realize the full utilization of energy.

[0022] 2. The hybrid power driving and fire extinguishing method of the application converts the liquefied gas in the liquefied gas storage tank into gaseous high-pressure fire-retardant gas through the pressure reducing valve and the heater, and through the combination with the battery, the three power modes of pure electric driving, hybrid driving and pure high-pressure gas can be realized, and only the battery is used for electric driving at low speed, so that the demand for battery capacity is reduced, and the advantages of energy saving and environmental protection, high energy density, no need to equip a heat dissipation system and no dependence on the battery are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 1 is a structural schematic diagram of the hybrid power driving and fire extinguishing system of the first embodiment of the application;

[0024] Figure 2 Fig. 2 is a structural schematic diagram of the hybrid power driving and fire extinguishing system of the second embodiment of the application;

[0025] Figure 3 Fig. 3 is a flow schematic diagram of the hybrid power driving method of the application;

[0026] Figure 4 Fig. 4 is a schematic diagram of the relationship between power and pressure reduction ratio in the hybrid power driving method of the application;

[0027] Reference numerals: 1. Liquefied gas storage tank; 11. Pressure relief valve; 12. Temperature sensor; 13. Pressure sensor; 14. Liquefied gas inlet pipe; 141. Filling valve; 142. Check valve; 21. Pressure reducing valve; 22. Heater; 31. First three-way valve; 32. Second three-way valve; 33. Third three-way valve; 4. Chassis; 41. Dual-drive motor; 42. Power recovery device; 43. Power output shaft; 44. Power bearing; 5. Circulating cooling system. System; 51. Coolant tank; 52. Coolant inlet pipe; 53. Coolant outlet pipe; 54. Internal cooling pipe; 6. Battery; 61. Battery charging interface; 71. First fire extinguishing connector; 72. Second fire extinguishing connector; 8. Electric on / off valve; 9. Vent pipe assembly; 91. First vent pipe; 92. Second vent pipe; 93. Third vent pipe; 94. Fourth vent pipe; 95. Fifth vent pipe; 96. Sixth vent pipe. Detailed Implementation

[0028] To further understand the invention's content, features, and effects, the following embodiments are provided, along with accompanying drawings. Figures 1 to 3 The details are as follows.

[0029] like Figure 1 As shown, the present invention provides a hybrid power drive system that also has fire-fighting functions, including a liquefied gas storage tank 1, a pressure reducing valve 21, a heater 22, a chassis 4, a battery 6, and a ventilation pipeline group 9. The liquefied gas storage tank 1 can contain flame-retardant liquefied gas such as N2, which is inexpensive and does not pollute the environment.

[0030] The liquefied gas storage tank 1 is provided with a liquefied gas inlet pipe 14 and a venting pipeline group 9 at its inlet and outlet, respectively. The liquefied gas storage tank 1 is made of Dewar flask. The venting pipeline group 9 includes a first venting pipeline 91 connected to the liquefied gas storage tank 1. The pressure reducing valve 21 and the heater 22 are installed on the first venting pipeline 91. The pressure reducing valve 21 and the heater 22 are used to convert the liquefied gas into a high-pressure flame-retardant gas. The pressure reducing valve 21 is an adjustable pressure reducing valve, which can control the pressure reduction ratio.

[0031] The chassis 4 is equipped with a dual-power motor 41, which includes a pneumatic motor and an electric motor. The first ventilation pipe 91 is connected to the pneumatic motor through the second ventilation pipe 92. The pneumatic motor is driven by the high-pressure flame-retardant gas, and the electric motor is driven by the battery 6.

[0032] The second ventilation pipe 92 is connected to at least one fire extinguishing pipe assembly for fire extinguishing, and the end of the fire extinguishing pipe assembly away from the second ventilation pipe 92 is provided with a connector for connecting to an external air pipe.

[0033] The hybrid drive and fire extinguishing system of the present application converts the liquefied gas in the liquefied gas storage tank into gaseous high-pressure fire-retardant gas through the pressure reducing valve and the heater, the generated high-pressure fire-retardant gas can not only realize the function of hybrid drive in cooperation with the battery, but also realize the function of rapid fire extinguishing through the set fire extinguishing pipeline group in emergency, in addition, the heat of the system is taken away by the compressed liquefied gas, realizing the full utilization of energy.

[0034] As a preferred embodiment, as shown in Figure 1 The power recovery device 42 is connected with the double-power motor 41 through the power output shaft 43, and the power output shaft 43 is supported by the power bearing 44.

[0035] As a preferred embodiment, as shown in Figure 1 The liquefied gas storage tank 1 is provided with a temperature sensor 12 and a pressure sensor 13, and the liquefied gas storage tank 1 is provided with a circulating cooling system 5 cooperating with the temperature sensor 12, and the liquefied gas storage tank 1 is provided with a pressure relief valve 11 electrically connected with the pressure sensor 13.

[0036] As a preferred embodiment, as shown in Figure 1 The circulating cooling system 5 includes a cooling liquid tank 51, a cooling liquid inlet pipe 52, a cooling liquid outlet pipe 53 and an in-tank cooling pipe 54, and the liquid in the liquefied gas storage tank 1 is circulated and cooled by the in-tank cooling pipe 54.

[0037] As a first embodiment, as shown in Figure 1 The first three-way valve 31 is provided in the second air pipe 92, the third end of the first three-way valve 31 is communicated with the fourth air pipe 94, the outlet of the air motor is communicated with the third air pipe 93, the third air pipe 93 and the fourth air pipe 94 are communicated with the fifth air pipe 95 through the third three-way valve 33 arranged in the middle, and the first fire-fighting connector 71 connected with the external air pipe is arranged at one end of the fifth air pipe 95 away from the third three-way valve 33. The above-mentioned fire extinguishing pipeline group includes a first fire extinguishing pipeline group composed of the first three-way valve 31, the fourth air pipe 94 and the fifth air pipe 95.

[0038] As a second embodiment, as shown in Figure 2As shown, compared with the first embodiment, a second three-way valve 32 is arranged in the second venting pipeline 92, a third end of the second three-way valve 32 is communicated with a sixth venting pipeline 96, an end of the sixth venting pipeline 96 away from the second three-way valve 32 is provided with a second fire-fighting connector 72 connected with an external air pipe, and an electric on-off valve 8 is arranged on the sixth venting pipeline 96, so that two fire-fighting points generated at the same time can be extinguished, and the fire-fighting efficiency is improved.

[0039] In the embodiment, the liquefied gas inflow pipe 14 is provided with a liquid filling valve 141 and a one-way valve 142, wherein the one-way valve 142 is used to prevent liquid backflow.

[0040] As shown in Figure 3 and 4 The application further provides a hybrid power driving method with fire-fighting function, comprising the following steps:

[0041] S1, when the vehicle speed is less than or equal to V1, the battery 6 is used to provide all power for the dual-power motor 41, and the pressure reducing ratio of the pressure reducing valve 21 is set to 0;

[0042] S2, when the vehicle speed is between V1 and V2, the pressure reducing ratio of the pressure reducing valve 21 is set to N1, the liquefied gas passes through the pressure reducing valve 21 and the heater 22, and phase change occurs, the liquefied gas absorbs the heat of the driving system, and becomes high-pressure fire-retardant gas after gasification, and is sequentially discharged through the first venting pipeline 91, the second venting pipeline 92, the pneumatic motor, the third venting pipeline 93 and the fifth venting pipeline 95, and the battery 6 is used to provide part of the power for the dual-power motor 41;

[0043] S3, when the vehicle speed is greater than or equal to V2, the pressure reducing ratio of the pressure reducing valve 21 is set to N2, wherein N2 < N1, and only the high-pressure fire-retardant gas after the gasification of the pressure reducing valve 21 and the heater 22 is used to provide all power for the dual-power motor 41.

[0044] The hybrid power driving and fire-fighting method of the application converts the liquefied gas in the liquefied gas storage tank into gaseous high-pressure fire-retardant gas through the pressure reducing valve and the heater, and through the combination with the battery, three power modes of pure electric driving, hybrid driving and pure high-pressure gas can be realized, and only the battery is used for electric driving at low speed, so that the demand for battery capacity is reduced, and the advantages of energy saving and environmental protection, high energy density, no need to equip a heat dissipation system and no dependence on the battery are achieved.

[0045] The fire-fighting function-considered hybrid power driving method further comprises: when a fire occurs outside, opening the pressure reducing valve 21 and the heater 22, and connecting part of the high-pressure fire-retardant gas to the first fire-fighting connector 71 through the fourth air pipe 94, the third three-way valve 33 and the fifth air pipe 95 in sequence by adjusting the first three-way valve 31 and the second three-way valve 32, and connecting another part of the high-pressure fire-retardant gas to the second fire-fighting connector 72 through the second air pipe 92, the second three-way valve 32 and the sixth air pipe 96 in sequence, and then connecting to the first fire-fighting connector 71 and the second fire-fighting connector 72 through the external air pipe to extinguish the fire, so as to achieve the purpose of considering the fire-fighting function.

[0046] The above description of the application only expresses the implementation of the embodiments of the application, and cannot be understood as a limitation on the scope of the patent application, nor as a limitation on the structure of the embodiments of the application in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the embodiments of the application, a number of changes and improvements can be made, which are within the scope of protection of the embodiments of the application.

Claims

1. A hybrid drive system with a fire function, characterized by: The liquefied gas storage tank (1), a pressure reducing valve (21), a heater (22), a machine box (4), a battery (6) and a ventilation pipeline group (9) are included. The liquefied gas storage tank (1) is provided with a liquefied gas inflow pipe (14) and a ventilation pipeline group (9) at the inlet and outlet respectively, the ventilation pipeline group (9) includes a first ventilation pipeline (91) connected to the liquefied gas storage tank (1), the pressure reducing valve (21) and the heater (22) are arranged on the first ventilation pipeline (91), and the pressure reducing valve (21) and the heater (22) are used for changing the liquefied gas into high-pressure fire-retardant gas. The machine box (4) is provided with a double-power motor (41), the double-power motor (41) includes a pneumatic motor and an electric motor, the first ventilation pipeline (91) is connected to the pneumatic motor through a second ventilation pipeline (92), the pneumatic motor is driven by the high-pressure fire-retardant gas, and the electric motor is driven by the battery (6). At least one fire extinguishing pipeline group for extinguishing fire is connected to the second ventilation pipeline (92), and a joint for connecting to an external gas pipe is arranged at one end of the fire extinguishing pipeline group away from the second ventilation pipeline (92).

2. The hybrid drive system with fire function according to claim 1, characterized in that: The machine box (4) further includes a power recovery device (42), a power output shaft (43) and a power bearing (44), the power recovery device (42) is connected to the double-power motor (41) through the power output shaft (43), and the power output shaft (43) is supported by the power bearing (44).

3. The hybrid drive system with fire function according to claim 1, characterized in that: The liquefied gas storage tank (1) is provided with a temperature sensor (12) and a pressure sensor (13), the liquefied gas storage tank (1) is provided with a circulating cooling system (5) matched with the temperature sensor (12), and a pressure relief valve (11) electrically connected to the pressure sensor (13) is arranged at the top of the liquefied gas storage tank (1).

4. The hybrid drive system with fire function according to claim 3, characterized in that: The circulating cooling system (5) includes a cooling liquid tank (51), a cooling liquid inlet pipe (52), a cooling liquid outlet pipe (53) and an in-tank cooling pipe (54), and the liquid in the liquefied gas storage tank (1) is circulated and cooled through the in-tank cooling pipe (54).

5. The hybrid drive system with fire function according to claim 1, characterized in that: The second ventilation pipeline (92) is further provided with a first three-way valve (31), a fourth ventilation pipeline (94) is communicated with a third end of the first three-way valve (31), an outlet of the pneumatic motor is communicated with a third ventilation pipeline (93), the third ventilation pipeline (93) and the fourth ventilation pipeline (94) are communicated with a fifth ventilation pipeline (95) through a third three-way valve (33) arranged in the middle, and a first fire-fighting joint (71) connected to an external gas pipe is arranged at one end of the fifth ventilation pipeline (95) away from the third three-way valve (33).

6. The hybrid drive system with fire function according to claim 5, characterized in that: The second venting pipeline (92) is further provided with a second three-way valve (32), a third end of the second three-way valve (32) is communicated with a sixth venting pipeline (96), an end of the sixth venting pipeline (96) away from the second three-way valve (32) is provided with a second fire joint (72) connected with an external air pipe, and the sixth venting pipeline (96) is provided with an electric on-off valve (8).

7. The hybrid drive system with fire function according to claim 1, characterized in that: The liquefied gas inflow pipe (14) is provided with a liquid filling valve (141) and a one-way valve (142).

8. A hybrid drive method with a fire function, characterized by, The method comprises the following steps: When the vehicle speed is less than or equal to V1, the battery (6) is used to provide all power for the dual-power motor (41); When the vehicle speed is between V1 and V2, the pressure reduction ratio of the pressure reduction valve (21) is set to N1, the liquefied gas is gasified into high-pressure fire-retardant gas through the pressure reduction valve (21) and the heater (22), and then is discharged through the first venting pipeline (91), the second venting pipeline (92), the pneumatic motor, the third venting pipeline (93) and the fifth venting pipeline (95) in sequence, at this time, the battery (6) is used to provide partial power for the dual-power motor (41); When the vehicle speed is greater than or equal to V2, the pressure reduction ratio of the pressure reduction valve (21) is set to N2, wherein N2 is less than N1, and only the high-pressure fire-retardant gas gasified through the pressure reduction valve (21) and the heater (22) is used to provide all power for the dual-power motor (41).

9. The hybrid drive method with fire function according to claim 8, characterized in that: When a fire occurs outside, the pressure reduction valve (21) and the heater (22) are opened, part of the high-pressure fire-retardant gas is connected to the first fire joint (71) through the fourth venting pipeline (94), the third three-way valve (33) and the fifth venting pipeline (95) in sequence by adjusting the first three-way valve (31) and the second three-way valve (32), and another part of the high-pressure fire-retardant gas is connected to the second fire joint (72) through the second venting pipeline (92), the second three-way valve (32) and the sixth venting pipeline (96) in sequence, and then is connected to the first fire joint (71) and the second fire joint (72) through the external air pipe to extinguish the fire.

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