Hydrogen replacement device and railway vehicle

Abstract

The invention discloses a hydrogen replacement device and a railway vehicle, and the hydrogen replacement device comprises a protective gas cylinder used for storing protective gas; the one-way valve is used for being connected between the outlet of the protective gas cylinder and the first connector of the hydrogen cylinder, the one-way valve is in a conducting state in the direction from the protective gas cylinder to the hydrogen cylinder, and the bottle opening valve is communicated with the second connector of the hydrogen cylinder; the hydrogen sensor is used for detecting the concentration value of hydrogen discharged by replacement in the hydrogen cylinder after the bottleneck valve is opened; and the first electric control device is used for controlling the bottleneck valve to be closed when the hydrogen concentration value detected by the hydrogen sensor is lower than a preset hydrogen concentration value. The residual amount of hydrogen in the hydrogen cylinder can be judged by utilizing the hydrogen concentration value of the replaced mixed gas through the hydrogen sensor, and then when the hydrogen concentration value is lower than the preset concentration value, it can be accurately judged that the residual amount of hydrogen in the hydrogen cylinder meets the replacement requirement, so that the accuracy of the replacement process is improved, and the replacement efficiency is improved. And the dangerous condition caused by excessive residual hydrogen is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and more specifically, to a hydrogen replacement device and a rail vehicle. Background Art

[0002] Due to the advantages of fuel cells such as no pollution and high energy density, fuel cells are increasingly used in the field of rail transit. When a fuel cell is in use, it needs a hydrogen cylinder to provide it with hydrogen supply, but the hydrogen cylinder faces a hydrogen replacement process. For example, when transporting a hydrogen cylinder, it is necessary to replace the hydrogen in the hydrogen cylinder with nitrogen. Taking advantage of the high stability of protective gases such as nitrogen, nitrogen is used as the protective gas in the hydrogen cylinder; when the fuel cell is in use, it is necessary to replace the nitrogen in the hydrogen cylinder with hydrogen so that the hydrogen cylinder can supply hydrogen to the fuel cell.

[0003] In the prior art, a host computer is manually connected to an on-board energy management controller of a rail vehicle. The on-board energy management controller controls the bottle mouth valve of the hydrogen cylinder to open or close based on a control command issued by the host computer so that hydrogen / nitrogen can be filled into the hydrogen cylinder, thereby realizing hydrogen replacement. However, the on-board energy management controller is not limited to controlling the bottle mouth valve of the hydrogen cylinder, but is also used to control other devices on the rail vehicle. Therefore, when the on-board energy management controller is running, the rail vehicle cannot be powered off. If the rail vehicle is in a power-off state, hydrogen replacement cannot be performed.

[0004] A hydrogen replacement scheme in the prior art can control the opening or closing of the bottle mouth valve of the hydrogen bottle without using an on-board energy management controller, and the hydrogen replacement device is provided with an independent power supply module, which supplies power to the bottle mouth valve control switch, the bottle mouth valve and the electronic control device, so that hydrogen replacement can be performed even when the rail vehicle is powered off. At the same time, performing hydrogen replacement when the rail vehicle is powered off improves the safety of the hydrogen replacement process.

[0005] However, when the above equipment is replacing hydrogen in a vehicle, it usually uses the number of replacements to determine whether the replacement is complete. For example, when a protective gas is filled into a hydrogen cylinder, when the pressure in the hydrogen cylinder exceeds the upper limit pressure value, the filling of the protective gas is stopped, and the vent valve automatically opens to discharge the mixed gas in the hydrogen cylinder; when the pressure in the hydrogen cylinder is lower than the lower limit pressure value, the vent valve is closed, and the bottle mouth valve is opened to continue filling the protective gas. After three or four cycles, it is assumed that the hydrogen in the hydrogen cylinder is completely replaced.

[0006] In the prior art, whether the replacement is complete is determined based on the number of replacements, which has low accuracy and may result in a large amount of hydrogen remaining in the hydrogen cylinder, leading to a dangerous situation.

[0007] Therefore, how to accurately judge whether the replacement is complete and improve the safety of the hydrogen cylinder is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0008] In view of this, the object of the present invention is to provide a hydrogen replacement device, so as to accurately determine whether the replacement is complete and improve the safety of the hydrogen cylinder;

[0009] Another object of the present invention is to provide a rail vehicle having the above-mentioned hydrogen replacement device.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A hydrogen replacement device is used to replace hydrogen in a hydrogen cylinder, wherein the hydrogen cylinder is provided with a bottle mouth valve, and the hydrogen replacement device comprises:

[0012] Protective gas cylinder, used to store protective gas;

[0013] A one-way valve is used to be connected between the outlet of the protective gas cylinder and the first interface of the hydrogen cylinder, and in the direction from the protective gas cylinder to the hydrogen cylinder, the one-way valve is in a conducting state, and the bottle mouth valve is connected to the second interface of the hydrogen cylinder;

[0014] A hydrogen sensor, used to detect the concentration of hydrogen discharged from the hydrogen bottle after the bottle mouth valve is opened;

[0015] The first electronic control device is used to control the bottle mouth valve to close when the hydrogen concentration value detected by the hydrogen sensor is lower than a preset hydrogen concentration value.

[0016] Optionally, in the above hydrogen replacement device, the one-way valve is an openable and closable one-way valve;

[0017] The hydrogen replacement device also includes a second electric control device for controlling the opening and closing of the one-way valve.

[0018] Optionally, in the above hydrogen replacement device, a pressure gauge is further included, and the pressure gauge is used to detect the pressure value of the hydrogen cylinder;

[0019] When the hydrogen replacement device is in a replacement state, the one-way valve is in an open state and the bottle mouth valve is in a closed state. When the pressure value detected by the pressure gauge exceeds a first preset pressure value, the first electronic control device controls the bottle mouth valve to be in an open state and the second electronic control device controls the one-way valve to be in a closed state. When the pressure value detected by the pressure gauge is lower than a second preset pressure value, the first electronic control device controls the bottle mouth valve to be in a closed state and the second electronic control device controls the one-way valve to be in an open state. The second preset pressure value is lower than the first preset pressure value.

[0020] Optionally, in the above hydrogen replacement device, when the hydrogen replacement device is in the replacement state, the one-way valve and the bottle mouth valve are both in the open state;

[0021] When the hydrogen concentration value detected by the hydrogen sensor is lower than a preset hydrogen concentration value, the first electronic control device controls the bottle mouth valve to be in a closed state, and the second electronic control device controls the one-way valve to be in a closed state.

[0022] Optionally, in the above hydrogen replacement device, the bottle mouth valve and the one-way valve are both solenoid valves, the bottle mouth valve has a bottle mouth valve control switch on its electrical circuit, and the one-way valve has a one-way valve control switch on its electrical circuit;

[0023] The first electronic control device is used to control the opening and closing of the bottle mouth valve by controlling the closing and opening of the bottle mouth valve control switch;

[0024] The second electric control device is used to control the opening and closing of the one-way valve by controlling the closing and opening of the one-way valve control switch.

[0025] Optionally, in the above hydrogen replacement device, a first power supply device and a second power supply device are further included;

[0026] The first power supply device is used to supply power to the first electric control device and the electrical circuit of the bottle mouth valve;

[0027] The second power supply device is used to supply power to the second electric control device and the electrical circuit of the one-way valve.

[0028] Optionally, in the above hydrogen replacement device, a power status display module is further included, the power status display module is connected to the circuit for the first power supply device to supply power to the first electric control device, and is used to display the working status of the first power supply device;

[0029] and / or,

[0030] It also includes a power status display unit, which is connected to the circuit through which the second power supply device supplies power to the second electric control device, and is used to display the working status of the second power supply device.

[0031] Optionally, in the above hydrogen replacement device, a voltage regulating module is further included, wherein the voltage regulating module is electrically connected between the first power supply device and the bottle mouth valve, and is used to regulate the voltage of the first power supply device and then supply power to the bottle mouth valve;

[0032] and / or,

[0033] It also includes a voltage regulating unit, which is electrically connected between the second power supply device and the one-way valve and is used to regulate the voltage of the second power supply device and then supply power to the one-way valve.

[0034] Optionally, in the above hydrogen replacement device, an operation status display module is further included, the operation status display module is connected to the circuit of the first power supply device for supplying power to the bottle mouth valve control switch and the bottle mouth valve, and is used to display the working status of the bottle mouth valve control switch;

[0035] and / or,

[0036] It also includes an operating status display unit, which is connected to the circuit of the second electronic control device that supplies power to the one-way valve control switch and the one-way valve, and is used to display the working status of the one-way valve control switch.

[0037] The hydrogen replacement device provided by the present invention is that the protective gas cylinder is filled with protective gas into the hydrogen cylinder through a one-way valve to replace the hydrogen, and the bottle mouth valve controls the replacement and discharge of the hydrogen. A hydrogen sensor is connected to the bottle mouth valve to detect the concentration of the replaced hydrogen. As the replacement process proceeds, the hydrogen cylinder is gradually replaced by the protective gas out of the hydrogen cylinder, and the hydrogen concentration value detected by the hydrogen sensor gradually decreases. When the hydrogen concentration value detected by the hydrogen sensor is lower than the preset hydrogen concentration value, the first electronic control device controls the bottle mouth valve to close, and the hydrogen replacement process is completed. The present invention can use the hydrogen concentration value in the replaced mixed gas through the hydrogen sensor to judge the residual amount of hydrogen in the hydrogen cylinder, and then when the hydrogen concentration value is lower than the preset concentration value, it can accurately judge that the residual amount of hydrogen in the hydrogen cylinder meets the replacement requirements, thereby improving the accuracy of the replacement process and preventing dangerous situations caused by excessive residual hydrogen.

[0038] A rail vehicle comprises the hydrogen replacement device as described in any one of the above items.

[0039] The rail vehicle provided by the present invention has all the technical effects of the above-mentioned hydrogen replacement device, and thus will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A system diagram of a hydrogen replacement device disclosed in an embodiment of the present invention;

[0042] Figure 2 A system diagram of a hydrogen replacement device disclosed in another embodiment of the present invention;

[0043] Figure 3 The present invention is a schematic diagram of the structure of a rail vehicle disclosed in an embodiment of the present invention.

[0044] The meanings of the reference numerals in the figures are as follows:

[0045] 1-Hydrogen cylinder; 2-Bottle mouth valve; 3-Hydrogen sensor; 4-Flow meter; 5-Bottle mouth valve control switch; 6-First electric control device; 7-First power supply device; 8-Protective gas cylinder; 9-One-way valve; 10-Pressure gauge; 11-Power status display module; 12-Operation status display module; 13-Voltage regulating module; 14-Second electric control device; 15-Second power supply device; 16-One-way valve control switch;

[0046] 100-Railway vehicles. DETAILED DESCRIPTION

[0047] The core of the present invention is to provide a hydrogen replacement device, which can accurately determine whether the replacement is complete and improve the safety of the hydrogen cylinder;

[0048] Another core of the present invention is to provide a rail vehicle having the above-mentioned hydrogen replacement device.

[0049] The following embodiments are described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention contents described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions to the inventions described in the claims. It should be noted that, for ease of description, only the parts related to the inventions are shown in the accompanying drawings. The embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0050] like Figure 1 and Figure 2 As shown, the hydrogen replacement device disclosed in the embodiment of the present invention is used to replace the hydrogen in the hydrogen cylinder 1. The hydrogen cylinder 1 is provided with a bottle mouth valve 2. The hydrogen replacement device includes a protective gas cylinder 8, a one-way valve 9, a hydrogen sensor 3 and a first electronic control device 6.

[0051] The protective gas cylinder 8 is used to store protective gas, and the protective gas can be an inert gas to improve safety, such as nitrogen, etc. The protective gas in the protective gas cylinder 8 should have a high pressure to ensure that the protective gas can be filled into the hydrogen cylinder 1.

[0052] The one-way valve 9 is used to connect between the outlet of the protective gas cylinder 8 and the first interface of the hydrogen cylinder 1, and in the direction from the protective gas cylinder 8 to the hydrogen cylinder 1, the one-way valve 9 is in a conducting state, and the bottle mouth valve 2 is connected to the second interface of the hydrogen cylinder 1. The first interface and the second interface of the hydrogen cylinder 1 can be realized by a tee, so that the interface of the hydrogen cylinder 1 is increased to two, namely the first interface and the second interface. The hydrogen cylinder 1 can also be provided with two interfaces at different positions, respectively as the first interface and the second interface, without the need to transform one interface into two interfaces through a tee.

[0053] The hydrogen sensor 3 is used to detect the concentration of hydrogen gas replaced and discharged from the hydrogen bottle 1 after the bottle mouth valve 2 is opened. The hydrogen sensor 3 can be connected to the bottle mouth valve 2 so that the mixed gas discharged through the bottle mouth valve 2 will flow through the hydrogen sensor 3, and the hydrogen sensor 3 can detect the concentration of hydrogen gas in the mixed gas. The hydrogen sensor 3 can select a resistive semiconductor sensor with SnO2 as the gas-sensitive material. After hydrogen is adsorbed, hydrogen releases electrons as a donor, thereby detecting the replacement concentration of hydrogen. It should be noted that the hydrogen sensor 3 can also select other types of sensors as long as it can detect the concentration of hydrogen.

[0054] The first electronic control device 6 is used to control the bottle mouth valve 2 to close when the hydrogen concentration value detected by the hydrogen sensor 3 is lower than the preset hydrogen concentration value. The preset hydrogen concentration value is a preset value set by those skilled in the art according to the purpose of replacement. For example, if the goal of those skilled in the art is to control the hydrogen concentration in the hydrogen bottle 1 within 1%, the preset hydrogen concentration value can be set to a value lower than 1%. The specific value of the preset hydrogen concentration value is not limited in this embodiment, as long as the transportation safety of the hydrogen bottle 1 can be ensured.

[0055] In the hydrogen replacement device provided by the present invention, the protective gas cylinder 8 is filled with protective gas into the hydrogen cylinder 1 through the one-way valve 9 for hydrogen replacement, and the bottle mouth valve controls the replacement and discharge of hydrogen. A hydrogen sensor 3 is connected to the bottle mouth valve 2 for detecting the concentration of the replaced hydrogen. As the replacement process proceeds, the hydrogen cylinder 1 is gradually replaced by the protective gas out of the hydrogen cylinder 1, and the hydrogen concentration value detected by the hydrogen sensor 3 gradually decreases. When the hydrogen concentration value detected by the hydrogen sensor 3 is lower than the preset hydrogen concentration value, the first electronic control device 6 controls the bottle mouth valve 2 to close, and the hydrogen replacement process is completed. The present invention can use the hydrogen concentration value in the replaced mixed gas through the hydrogen sensor to judge the residual amount of hydrogen in the hydrogen cylinder 1, and then when the hydrogen concentration value is lower than the preset concentration value, it can accurately judge that the residual amount of hydrogen in the hydrogen cylinder 1 meets the replacement requirements, thereby improving the accuracy of the replacement process and preventing dangerous situations caused by excessive residual hydrogen.

[0056] In a specific embodiment of the present invention, the one-way valve 9 is an openable and closable one-way valve. That is, the one-way valve 9 can be opened and closed by the action of its valve core. When the one-way valve 9 is in an open state, the one-way valve 9 can be kept in a conducting state in the direction from the protective gas cylinder 8 to the hydrogen cylinder 1; when the one-way valve 9 is in a closed state, the one-way valve 9 is in a cut-off state in the direction from the protective gas cylinder 8 to the hydrogen cylinder 1. In the direction from the hydrogen cylinder 1 to the protective gas cylinder 8, whether the one-way valve 9 is in an open state or a closed state, it is in a cut-off state.

[0057] The hydrogen replacement device may further include a second electronic control device 14 for controlling the opening and closing of the one-way valve 9. The second electronic control device 14 may control the working state of the one-way valve 9 according to demand, for example, the one-way valve 9 may be switched to an open state or a closed state.

[0058] It should be noted that the one-way valve 9 and the bottle mouth valve 2 can be controlled automatically or manually. For example, at least at the beginning of the replacement process, the one-way valve 9 and the bottle mouth valve 2 need to be opened manually.

[0059] In a specific embodiment of the present application, the hydrogen replacement device may further include a pressure gauge 10, and the pressure gauge 10 is used to detect the pressure value of the hydrogen cylinder.

[0060] When the hydrogen replacement device is in the replacement state, the one-way valve can be adjusted to the open state and the bottle mouth valve 2 can be adjusted to the closed state. The protective gas in the protective gas cylinder 8 has a relatively high pressure. Under the effect of the pressure difference with the hydrogen cylinder 1, the protective gas in the protective gas cylinder 8 is filled into the hydrogen cylinder 1, and the pressure of the hydrogen cylinder 1 gradually increases. The protective gas is mixed with the hydrogen in the hydrogen cylinder 1 to form a mixed gas.

[0061] When the pressure value detected by the pressure gauge 10 exceeds the first preset pressure value, the first electronic control device 6 controls the bottle mouth valve 2 to be in an open state, and the second electronic control device 14 controls the one-way valve 9 to be in a closed state. When the pressure value detected by the pressure gauge 10 is lower than the second preset pressure value, the first electronic control device 6 controls the bottle mouth valve 2 to be in a closed state, and the second electronic control device 14 controls the one-way valve 9 to be in an open state. The second preset pressure value is lower than the first preset pressure value.

[0062] The first preset pressure value is the pressure at which the hydrogen cylinder 1 starts to discharge the mixed gas, and those skilled in the art can set the first preset pressure value according to needs. It should be noted that the first preset pressure value should be less than the limit pressure value of the hydrogen cylinder 1, and must also be less than the pressure value of the protective gas in the protective gas cylinder 8.

[0063] The second preset pressure value is the pressure after the hydrogen cylinder 1 discharges the mixed gas, that is, the pressure at which the protective gas is started to be filled. Those skilled in the art can set the second preset pressure value according to their needs. It should be noted that the second preset pressure value should be less than the first preset pressure value.

[0064] When the hydrogen replacement device is needed to replace the hydrogen in the hydrogen cylinder 1, the bottle mouth valve 2 can be manually opened and the one-way valve 9 can be closed, so that the hydrogen replacement device is in a replacement state. As the protective gas in the protective gas cylinder 8 is gradually filled into the hydrogen cylinder 1, the pressure in the hydrogen cylinder 1 gradually increases and is measured by the pressure gauge 10. When the pressure in the hydrogen cylinder 1 increases to the first preset pressure value, the bottle mouth valve 2 is opened, the one-way valve 9 is closed, the filling of the protective gas is stopped, and the mixed gas in the hydrogen cylinder 1 is discharged at the same time, thereby achieving the purpose of discharging hydrogen.

[0065] As the mixed gas in the hydrogen cylinder 1 is gradually discharged, the pressure in the hydrogen cylinder 1 gradually decreases and is measured by the pressure gauge 10. When the pressure in the hydrogen cylinder 1 drops to the second preset pressure value, the one-way valve 9 and the bottle mouth valve 2 are opened, the bottle mouth valve 2 is closed, and the protective gas is continued to be filled. When the pressure rises to the first preset pressure value, the mixed gas is continued to be discharged. This cycle is repeated several times to achieve the concentration of hydrogen that meets the replacement requirements. The specific number of cycles should be based on the hydrogen concentration value detected by the hydrogen sensor 3.

[0066] In the above embodiment, when the protective gas is filled, the pressure of the hydrogen cylinder 1 gradually increases as the protective gas is continuously filled, and the filling process is more laborious as the pressure of the protective gas increases with the pressure of the hydrogen cylinder 1. Moreover, the protective gas needs to be filled into the hydrogen cylinder 1 until the pressure in the hydrogen cylinder 1 reaches the first preset pressure value before the mixed gas inside can be discharged, resulting in a low replacement efficiency.

[0067] Based on this, in a specific embodiment of the present invention, when the hydrogen replacement device is in the replacement state, the one-way valve 9 and the bottle mouth valve 2 are both in the open state, so that the mixed gas can be discharged while the protective gas is filled in, without having to wait until the pressure rises to the corresponding pressure value before discharging the mixed gas, thereby improving the replacement efficiency.

[0068] Since the hydrogen cylinder 1 is filled with protective gas and discharged with mixed gas at the same time, in order to ensure that as much hydrogen as possible can be discharged after the protective gas is filled, in this embodiment, a spiral airway is provided on the one-way valve 9 and / or the first interface of the hydrogen cylinder 1. After the protective gas passes through the one-way valve 9 and / or the spiral airway of the first interface, it spins, which can accelerate the mixing with the hydrogen in the hydrogen cylinder 1, so that more hydrogen can be discharged, and the situation that the protective gas enters the hydrogen cylinder 1 and is not mixed with hydrogen before being discharged from the hydrogen cylinder 1 can be prevented. It can also avoid the situation that the hydrogen sensor 3 misjudges that the replacement condition is met (that is, the hydrogen concentration value detected by the hydrogen sensor 3 is lower than the preset hydrogen concentration value) due to the difference between the hydrogen concentration of the discharged mixed gas (containing more protective gas) and the hydrogen concentration of the mixed gas in the hydrogen cylinder 1 (containing more hydrogen), so that the first electronic control device 6 controls the bottle mouth valve 2 to close and stop the replacement.

[0069] When the hydrogen concentration value detected by the hydrogen sensor 3 is lower than the preset hydrogen concentration value, the first electronic control device 6 controls the bottle mouth valve 2 to be in a closed state, and the second electronic control device 14 controls the one-way valve 9 to be in a closed state. The hydrogen concentration value detected by the hydrogen sensor 3 is used as the basis for judging whether the replacement is complete. When the hydrogen concentration value is lower than the preset hydrogen concentration value, the bottle mouth valve 2 and the one-way valve 9 are both closed, so that the protective gas is sealed in the hydrogen bottle 1 to ensure transportation safety. In addition, when the hydrogen concentration value detected by the hydrogen sensor 3 is lower than the preset hydrogen concentration value, the bottle mouth valve 2 can be closed first, and the one-way valve 9 can be closed after a preset time, or when the pressure value detected by the pressure gauge 10 exceeds the third preset pressure value, the one-way valve 9 can be closed, and the third preset pressure value is between the first preset pressure value and the second preset pressure value.

[0070] In this embodiment, when the hydrogen replacement meets the requirements, the bottle mouth valve 2 and the one-way valve 9 can be closed at the same time. The bottle mouth valve 2 can also be closed first, and then the one-way valve 9 is closed, so that more protective gas is filled into the hydrogen bottle 1, further improving the transportation safety.

[0071] In a specific embodiment of the present invention, the bottle mouth valve 2 and the one-way valve 9 are both solenoid valves, and the electrical circuit of the bottle mouth valve 2 is provided with a bottle mouth valve control switch 5. The first electronic control device 6 is used to control the opening and closing of the bottle mouth valve 2 by controlling the closing and opening of the bottle mouth valve control switch 5.

[0072] That is, the open state and the closed state of the bottle mouth valve 2 are switched by powering on and off the bottle mouth valve 2. For example, when the power is on, the bottle mouth valve 2 is in the open state, and when the power is off, the bottle mouth valve 2 is in the closed state. Of course, it can also be set that when the power is on, the bottle mouth valve 2 is in the closed state, and when the power is off, the bottle mouth valve 2 is in the open state.

[0073] The bottle mouth valve control switch 5 can be arranged in the electrical circuit of the bottle mouth valve 2, and the bottle mouth valve control switch 5 is turned on and off to realize the switching between the power on and power off of the bottle mouth valve 2, and then the switching between the open state and the closed state of the bottle mouth valve 2 is realized. That is, in this embodiment, the first electronic control device 6 can realize the switching of the state of the bottle mouth valve 2 by controlling the connection and disconnection of the bottle mouth valve control switch 5.

[0074] The electrical circuit of the one-way valve 9 is provided with a one-way valve control switch 16. The second electric control device 14 is used to control the opening and closing of the one-way valve 9 by controlling the closing and opening of the one-way valve control switch 16.

[0075] That is, the open state and the closed state of the one-way valve 9 are switched by energizing and de-energizing the one-way valve 9. For example, when the power is on, the one-way valve 9 is in the open state, and when the power is off, the one-way valve 9 is in the closed state. Of course, it can also be set that when the power is on, the one-way valve 9 is in the closed state, and when the power is off, the one-way valve 9 is in the open state.

[0076] The one-way valve control switch 16 can be arranged in the electrical circuit of the one-way valve 9, and the one-way valve control switch 16 is turned on and off to switch between power on and power off of the one-way valve 9, and then the one-way valve 9 is switched between the open state and the closed state. That is, in this embodiment, the second electronic control device 14 can switch the state of the one-way valve 9 by controlling the one-way valve control switch 16 to be turned on and off.

[0077] In a specific embodiment of the present invention, the hydrogen replacement device may further include a first power supply device 7 and a second power supply device 15. The first power supply device 7 is used to supply power to the first electric control device 6 and the electric circuit of the bottle mouth valve 2; the second power supply device 15 is used to supply power to the second electric control device 14 and the electric circuit of the one-way valve 9.

[0078] The first power supply device 7 and the second power supply device 15 can both adopt EPS (Emergency Power Supply) power supply. The EPS power supply is mainly composed of input and output units, charging modules, battery packs, inverters, monitors, output switching devices and other parts. In terms of power supply function, its electric energy utilization rate is higher than UPS (Uninterruptible Power Supply) and has a better power supply effect.

[0079] It should be noted that both the first power supply device 7 and the second power supply device 15 may use UPS; or the first power supply device 7 uses EPS power supply, while the second power supply device 15 uses UPS power supply. This embodiment does not limit the specific power supply form of the first power supply device 7 and the second power supply device 15, as long as they can power the device.

[0080] In a specific embodiment of the present invention, the hydrogen replacement device may further include a power supply status display module 11, which is connected to the circuit in which the first power supply device 7 supplies power to the first electric control device 6, and is used to display the working status of the first power supply device 7. The power supply status display module 11 may be an indicator light, so that the operator can judge whether the first power supply device 7 can normally supply power to the circuit in which the first electric control device 6 is located. That is, when the indicator light (i.e., the power supply status display module 11) can be lit, it means that the first power supply device 7 can normally supply power to the circuit in which the first electric control device 6 is located, and when the indicator light cannot be lit, it means that the first power supply device 7 cannot normally supply power to the circuit in which the first electric control device 6 is located, so as to remind the operator to perform maintenance.

[0081] Similarly, the hydrogen replacement device may further include a power status display unit (not shown in the figure), which is connected to the circuit where the second power supply device 15 supplies power to the second electric control device 14, and is used to display the working status of the second power supply device 15. The power status display unit may be an indicator light, so that the operator can judge whether the second power supply device 15 can normally supply power to the circuit where the second electric control device 14 is located. That is, when the indicator light (i.e., the power status display unit) can be lit, it means that the second power supply device 15 can normally supply power to the circuit where the second electric control device 14 is located, and when the indicator light cannot be lit, it means that the second power supply device 15 cannot normally supply power to the circuit where the second electric control device 14 is located, so as to remind the operator to perform maintenance.

[0082] In a specific embodiment of the present invention, the hydrogen replacement device may further include a voltage regulating module 13, which is electrically connected between the first power supply device 7 and the bottle mouth valve 2, and is used to regulate the voltage of the first power supply device 7 and then supply power to the bottle mouth valve 2. That is, the voltage regulating module 13 is connected to the circuit in which the first power supply device 7 supplies power to the bottle mouth valve 2.

[0083] Similarly, the hydrogen replacement device may further include a voltage regulating unit, which is electrically connected between the second power supply device 15 and the one-way valve 9 and is used to regulate the voltage of the second power supply device 15 and then supply power to the one-way valve 9. That is, the voltage regulating unit is connected to the circuit in which the second power supply device 15 supplies power to the one-way valve 9.

[0084] In a specific embodiment of the present invention, the hydrogen replacement device may further include an operation status display module 12, which is connected to the circuit for the first power supply device 7 to supply power to the bottle mouth valve control switch 5 and the bottle mouth valve 2, and is used to display the working status of the bottle mouth valve control switch 5. The operation status display module 12 may be an indicator light, so that the operator can judge the switch status of the bottle mouth valve control switch 5 and then judge the working status of the bottle mouth valve 2.

[0085] That is, when the indicator light (i.e., the operating status display module 12) is lit, it indicates that the bottle mouth valve control switch 5 is in a closed state, and the bottle mouth valve 2 is in a powered state. According to the state of the bottle mouth valve 2 when it is powered on, it can be determined whether the bottle mouth valve 2 is currently in an open state or a closed state.

[0086] When the indicator light (i.e., the operating status display module 12) is off, it indicates that the bottle mouth valve control switch 5 is in the disconnected state, and the bottle mouth valve 2 is in the power-off state. According to the state of the bottle mouth valve 2 when the power is off, it can be determined whether the bottle mouth valve 2 is currently in the open state or the closed state.

[0087] It should be noted that when the first power supply device 7 fails, the indicator light (i.e., the operating status display module 12) may fail to light up. In this case, the state of the power supply status display module 11 may be combined to determine whether the first power supply device 7 has a fault. If so, the first power supply device 7 should be repaired as soon as possible. If the power supply status display module 11 indicates that the first power supply device 7 has no fault, and after the first electronic control device 6 controls the bottle mouth valve control switch 5 to close, but the indicator light (i.e., the operating status display module 12) is still off, it means that the bottle mouth valve control switch 5 has a fault, and the operator is reminded to repair it in time.

[0088] Similarly, the hydrogen replacement device may further include an operation status display unit, which is connected to the circuit for the second electronic control device 14 to supply power to the one-way valve control switch 16 and the one-way valve 9, and is used to display the working status of the one-way valve control switch 16. The operation status display unit may be an indicator light, so that the operator can easily judge the switch status of the one-way valve control switch 16, and then judge the working status of the one-way valve 9.

[0089] That is, when the indicator light (i.e., the operating status display unit) is lit, it indicates that the one-way valve control switch 16 is in a closed state, and the one-way valve 9 is in an energized state. Based on the state of the one-way valve 9 when it is energized, it can be determined whether the one-way valve 9 is currently in an open state or a closed state.

[0090] When the indicator light (i.e., the operating status display unit) is off, it means that the one-way valve control switch 16 is in the disconnected state, and the one-way valve 9 is in the power-off state. Based on the state of the one-way valve 9 when the power is off, it can be determined whether the one-way valve 9 is currently in the open state or the closed state.

[0091] It should be noted that when the second power supply device 15 fails, the indicator light (i.e., the operation status display unit) may fail to light up. In this case, the state of the power status display unit can be combined to determine whether the second power supply device 15 has a fault. If so, the second power supply device 15 should be repaired as soon as possible. If the power status display unit indicates that the second power supply device 15 has no fault, and after the first electronic control device 6 controls the one-way valve control switch 16 to close, but the indicator light (i.e., the operation status display unit) is still off, it means that the one-way valve control switch 16 has a fault, and the operator is reminded to repair it in time.

[0092] In a specific embodiment of the present invention, the hydrogen replacement device may further include a flow meter 4, which is connected to the bottle mouth valve 2 and is used to detect the flow rate of the mixed gas replaced and discharged from the hydrogen bottle 1 after the bottle mouth valve 2 is opened. The flow value measured by the flow meter 4 can be used to calculate how much mixed gas is discharged after a complete replacement, and record it to facilitate comparison of different replacement methods, and after the replacement is complete, which replacement method saves more protective gas.

[0093] like Figure 3 As shown, the embodiment of the present invention further discloses a rail vehicle 100, which includes the hydrogen replacement device disclosed in the above embodiment. Since the rail vehicle 100 has the above hydrogen replacement device, it has all the technical effects of the above hydrogen replacement device, which will not be described in detail herein.

[0094] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0095] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0096] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0097] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A hydrogen replacement device, characterized in that: Used to replace hydrogen in a hydrogen cylinder (1), the hydrogen cylinder (1) being provided with a bottle mouth valve (2), the hydrogen replacement device comprising: A protective gas cylinder (8), used for storing protective gas; a one-way valve (9) for connecting between the outlet of the protective gas cylinder (8) and the first interface of the hydrogen cylinder (1), and in the direction from the protective gas cylinder (8) to the hydrogen cylinder (1), the one-way valve (9) is in a conducting state, and the bottle mouth valve (2) is in communication with the second interface of the hydrogen cylinder (1); A hydrogen sensor (3) is used to detect the concentration of hydrogen discharged from the hydrogen bottle (1) after the bottle mouth valve (2) is opened; The first electric control device (6) is used to control the bottle mouth valve (2) to close when the hydrogen concentration value detected by the hydrogen sensor (3) is lower than a preset hydrogen concentration value.

2. The hydrogen replacement device according to claim 1, characterized in that: The one-way valve (9) is an openable and closable one-way valve; The hydrogen replacement device further comprises a second electric control device (14) for controlling the opening and closing of the one-way valve (9).

3. The hydrogen replacement device according to claim 2, characterized in that: It also includes a pressure gauge (10), wherein the pressure gauge (10) is used to detect the pressure value of the hydrogen cylinder; When the hydrogen replacement device is in a replacement state, the one-way valve is in an open state and the bottle mouth valve (2) is in a closed state. When the pressure value detected by the pressure gauge (10) exceeds a first preset pressure value, the first electronic control device (6) controls the bottle mouth valve (2) to be in an open state and the second electronic control device (14) controls the one-way valve (9) to be in a closed state. When the pressure value detected by the pressure gauge (10) is lower than a second preset pressure value, the first electronic control device (6) controls the bottle mouth valve (2) to be in a closed state and the second electronic control device (14) controls the one-way valve (9) to be in an open state. The second preset pressure value is lower than the first preset pressure value.

4. The hydrogen replacement device according to claim 2, characterized in that: When the hydrogen replacement device is in a replacement state, the one-way valve and the bottle mouth valve (2) are both in an open state; When the hydrogen concentration value detected by the hydrogen sensor (3) is lower than a preset hydrogen concentration value, the first electronic control device (6) controls the bottle mouth valve (2) to be in a closed state, and the second electronic control device (14) controls the one-way valve (9) to be in a closed state.

5. The hydrogen replacement device according to claim 2, characterized in that: The bottle mouth valve (2) and the one-way valve (9) are both solenoid valves, the electrical circuit of the bottle mouth valve (2) is provided with a bottle mouth valve control switch (5), and the electrical circuit of the one-way valve (9) is provided with a one-way valve control switch (16); The first electric control device (6) is used to control the opening and closing of the bottle mouth valve (2) by controlling the closing and opening of the bottle mouth valve control switch (5); The second electric control device (14) is used to control the opening and closing of the one-way valve (9) by controlling the closing and opening of the one-way valve control switch (16).

6. The hydrogen replacement device according to claim 5, characterized in that: It also includes a first power supply device (7) and a second power supply device (15); The first power supply device (7) is used to supply power to the first electric control device (6) and the electrical circuit of the bottle mouth valve (2); The second power supply device (15) is used to supply power to the second electric control device (14) and the electrical circuit of the one-way valve (9).

7. The hydrogen replacement device according to claim 6, characterized in that: It also comprises a power status display module (11), the power status display module (11) being connected to a circuit through which the first power supply device (7) supplies power to the first electric control device (6), and being used to display the working status of the first power supply device (7); and / or, It also comprises a power status display unit, which is connected to a circuit through which the second power supply device (15) supplies power to the second electric control device (14) and is used to display the working status of the second power supply device (15).

8. The hydrogen replacement device according to claim 6, characterized in that: It also includes a voltage regulating module (13), the voltage regulating module (13) being electrically connected between the first power supply device (7) and the bottle mouth valve (2) and being used for regulating the voltage of the first power supply device (7) and then supplying power to the bottle mouth valve (2); and / or, It also comprises a voltage regulating unit, which is electrically connected between the second power supply device (15) and the one-way valve (9) and is used to regulate the voltage of the second power supply device (15) and then supply power to the one-way valve (9).

9. The hydrogen replacement device according to claim 6, characterized in that: It also includes an operating status display module (12), the operating status display module (12) being connected to a circuit for the first power supply device (7) to supply power to the bottle mouth valve control switch (5) and the bottle mouth valve (2), and being used to display the operating status of the bottle mouth valve control switch (5); and / or, It also includes an operating status display unit, which is connected to a circuit of the second electric control device (14) for supplying power to the one-way valve control switch (16) and the one-way valve (9), and is used to display the operating status of the one-way valve control switch (16).

10. A rail vehicle, characterized in that: It comprises the hydrogen replacement device as described in any one of claims 1 to 9.

Images