CN205089484U - Two fuel locomotive fuel mode switch systems - Google Patents
Two fuel locomotive fuel mode switch systems Download PDFInfo
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- CN205089484U CN205089484U CN201520852982.7U CN201520852982U CN205089484U CN 205089484 U CN205089484 U CN 205089484U CN 201520852982 U CN201520852982 U CN 201520852982U CN 205089484 U CN205089484 U CN 205089484U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The utility model provides a two fuel locomotive fuel mode switch systems, two fuel locomotive include the engine, start electromechanics to spout controller, LNG jar, switched systems is including supplying liquid trip valve, vaporizer, relief valve, air solenoid valve, diffusing valve, methane detection system, locomotive computer. The utility model discloses carry out security control to two fuel locomotive, the security that has improved two fuel locomotive fuel mode switch from to a great extent.
Description
Technical field
The utility model belongs to technical field of rail traffic, particularly relates to a kind of double fuel railroad fuel mode switching system.
Background technique
The double fuel locomotive sample car that our company manufactures is domestic employing first with methane gas is the locomotive of power, at present also relevant double fuel motorcycle safety safeguards system control strategy technology both at home and abroad.
One of fuel that double fuel locomotive uses is flammable very strong rock gas, therefore very necessary to the security fence of locomotive, it may be necessary and detect and prevent the leakage of LNG/CNG in storage, gasification, transmitting procedure on LNG/CNG locomotive, thus ensure the traveling of locomotive energy normal safe, ensure the personal safety of driver and conductor.
Summary of the invention
For solving the problem, the utility model provides a kind of double fuel railroad fuel mode switching system, described double fuel locomotive comprises motor, engine electric spray controller, LNG tank, and described switched system comprises feed flow cut-off valve, vaporizer, safety valve, air inlet electromagnetic valve, diffusion valve, methane detection system, locomotive microcomputer;
LNG tank, feed flow cut-off valve, vaporizer are connected in turn by LNG pipeline, and vaporizer safety valve, air inlet electromagnetic valve, diffusion valve, motor are connected in turn by methane gas pipeline;
The methane detection main frame that methane detection system comprises the some methane transducers be distributed on locomotive, communicates to connect with each methane transducer;
Described locomotive microcomputer and engine electric spray controller, methane detection main frame, motor PLC (engine controller) communicate to connect;
Engine electric spray controller is used for sending double fuel enable signal to microcomputer;
Described locomotive microcomputer for control feed flow cut-off valve and air inlet electromagnetic valve break-make, receive double fuel enable signal, detect locomotive and whether meet double fuel service condition, send dual fuel mode switching signal to transmitter PLC;
Each methane transducer for detecting the methane leakage concentration of its position, and sends testing result to methane detection main frame;
Methane detection main frame is used for the difference according to methane leakage concentration, carries out different warnings.
Further, also comprise Manual drain valve, described Manual drain valve is between safety valve and air inlet electromagnetic valve.
The switching method of above-mentioned double fuel railroad fuel mode switching system, comprises the workflow entering dual fuel mode and the workflow exiting dual fuel mode,
The workflow entering dual fuel mode comprises the steps:
Step one: driver selects dual fuel mode;
Step 2: locomotive loads;
Step 3: locomotive microcomputer detects the double fuel service condition whether meeting and pre-determined, and if so, then carries out step 3, as otherwise repeat this step;
Step 4: engine electric spray controller sends double fuel enable signal to locomotive microcomputer;
Step 5: locomotive microcomputer controls to open feed flow cut-off valve, and locomotive enters dual fuel mode;
The workflow exiting dual fuel mode comprises the steps:
Step one: driver selects to exit dual fuel mode;
Step 2: locomotive microcomputer controls to close feed flow cut-off valve, stops continuing outside feed flow from LNG tank;
Step 3: locomotive microcomputer controls to close air inlet electromagnetic valve, opens automatic relief valve;
Step 5: microcomputer sends to engine controller and exits dual fuel mode switching signal;
Step 6: motor receives and exits dual fuel mode switching signal;
Step 7: motor exits dual fuel mode, enters pure fuel oil operating mode.
Preferably, exit in the workflow of dual fuel mode, after step 2 performs, time delay performs step 3 after a period of time again.
Preferred, exit in the workflow of dual fuel mode, after step 2 performs, time delay performed step 3 after 30 seconds.
Preferably, exit in the workflow of dual fuel mode, after step 6 performs, time delay a period of time performs step 7 again.
Preferred, exit in the workflow of dual fuel mode, after step 6 performs, time delay performed step 7 after 30 seconds.
Preferred, keep between step 6 and step 7 in the process of dual fuel mode, detecting locomotive and whether meet the double fuel service condition pre-determined, if do not met, then performing step 7 immediately.
Further, described double fuel service condition comprises: after machine oil heat exchange, water temperature is greater than 40 DEG C, CH_4 detection is not reported to the police, engine speed is greater than motor set rotary speed (the utility model is set as 580rpm).
The beneficial effects of the utility model are:
1. on all locomotives being one of fuel or fuel with LNG or CNG, all the technical program can be used.
2. by control strategy, deathtrap, critical time on locomotive are reduced to minimum, to reduce the potential risk that may affect locomotive, personnel and device security.
3. be provided with suitable control, warning, monitoring, cut-out and gas exploration policy, guarantee gas fuel system safety, reliable operation.
4. can, when locomotive generation abnormal running situation, as carried out safety dumping to methane in gas piping after fault unloading, shutdown, avoid, in locomotive, blast accident occurs.
The utility model carries out safety guarantee control to double fuel locomotive, from the Security greatly enhancing the switching of double fuel railroad fuel pattern.
Accompanying drawing explanation
Fig. 1 is the utility model system architecture schematic diagram.
Embodiment
Double fuel locomotive described in the utility model comprises motor, engine electric spray controller, LNG tank, and described switched system comprises feed flow cut-off valve, vaporizer, safety valve, air inlet electromagnetic valve, diffusion valve, methane detection system, locomotive microcomputer.
LNG tank, feed flow cut-off valve, vaporizer are connected in turn by LNG pipeline, and vaporizer safety valve, air inlet electromagnetic valve, diffusion valve, motor are connected in turn by methane gas pipeline.
The methane detection main frame that methane detection system comprises the some methane transducers be distributed on locomotive, communicates to connect with each methane transducer.
Described locomotive microcomputer is connected with engine electric spray controller, methane detection main frame, motor plc communication.
Engine electric spray controller is used for sending double fuel enable signal to microcomputer.
Described locomotive microcomputer for control feed flow cut-off valve and air inlet electromagnetic valve break-make, receive double fuel enable signal, detect locomotive and whether meet double fuel service condition, send dual fuel mode switching signal to transmitter PLC.
Each methane transducer for detecting the methane leakage concentration of its position, and sends testing result to methane detection main frame.Methane transducer is distributed on locomotive, is generally between electric equipment compartment and/or motor and/or chilling room and/or tank car, or other easily produce places of methane leakages.
Methane detection main frame is used for the difference according to methane leakage concentration, carries out different warnings.
Certainly, described system must comprise power supply, and on general locomotive, equipment use is Ac, a storage battery and an inverter can be utilized to realize, or directly use Ac.
Below the switching mode of native system is described.
Comprise the workflow entering dual fuel mode and the workflow exiting dual fuel mode,
The workflow entering dual fuel mode comprises the steps:
Step one: driver selects dual fuel mode.
Step 2: locomotive loads.
Step 3: locomotive microcomputer detects the double fuel service condition whether meeting and pre-determined, and if so, then carries out step 3, as otherwise repeat this step.
Step 4: engine electric spray controller sends double fuel enable signal to locomotive microcomputer.
Step 5: locomotive microcomputer controls to open feed flow cut-off valve, and locomotive enters dual fuel mode.
The workflow exiting dual fuel mode comprises the steps:
Step one: driver selects to exit dual fuel mode.
Step 2: locomotive microcomputer controls to close feed flow cut-off valve, stops continuing outside feed flow from LNG tank.
Step 3: locomotive microcomputer controls to close air inlet electromagnetic valve, opens automatic relief valve.
Step 5: microcomputer sends to motor and exits dual fuel mode switching signal.
Step 6: motor receives and exits dual fuel mode switching signal.
Step 7: motor exits dual fuel mode, enters pure fuel oil operating mode.
Preferably, after step 2 performs, time delay performs step 3 after a period of time again.After step 6 performs, time delay a period of time performs step 7.As far as possible the object of time delay has been burnt by the methane gas gasified in locomotive air pipe, allows residual methane gas as far as possible few in air pipe, reduces possibility and the amount of leakage of later stage methane leakage.It is 30s that the present embodiment arranges delay time, and this numerical value can better residual methane gas less, and can not the time oversize, lower efficiency.
As kept in dual fuel mode process at motor time delay 30s, non-time delay has not met double fuel service condition (as locomotive unloading to 30s motor, gaseous-pressure is less than 0.5bar), then motor exits dual fuel mode at once, locomotive microcomputer controls the air inlet electromagnetic valve before killing engine, and opens diffusion valve; As loine pressure after now vaporizer is greater than 1.4MPa, then safety valve action gets rid of excess pressure.
When locomotive failure unloads, microcomputer cuts out the feed flow cut-off valve on LNG pipeline, the air inlet electromagnetic valve before motor automatically, and stop for liquid/gas, open diffusion valve, motor exits dual fuel mode simultaneously, enters pure fuel oil operating mode.
When CH_4 detection device detects that methane concentration reaches lower bound--during warning signal (25%LEL) alarming value, microcomputer controls to cut out the feed flow cut-off valve on LNG pipeline, stop feed flow, air inlet electromagnetic valve before time delay 30s de-activation engine, open diffusion valve, motor exits dual fuel mode, enters pure fuel oil operating mode.
When locomotive receives emergency-stop signal (racing of the engine, crankcase pressure be high, reveal methane concentration is greater than 50%LEL), emergency shutdown action implemented by locomotive.During locomotive emergency shutdown, microcomputer unloads, and gives engine emergency stopping signal simultaneously, and steam supply valve before cutting off LNG liquid supply valve and motor, open diffusion valve X6 simultaneously and diffuse in vent external air by methane gas in pipeline before motor, motor is shut down.
When locomotive rotating speed is less than setting value, the present embodiment is set to≤580rpm, and microcomputer controls to turn off feed flow cut-off valve, cuts off LNG feed flow, and as engine speed≤380rpm, turn off air inlet electromagnetic valve, now motor exits dual fuel mode.Microcomputer controls automatic relief valve events simultaneously, by emptying for methane gas in pipeline between feed flow cut-off valve to motor, avoids engine exhaust port blast accident occurs.
It should be noted that EFI controller provides double fuel enable signal and need meet the following conditions:
(1) electric injection system alarm free;
(2) engine oil gate signal is not less than specified value;
(3) engine speed is not less than specified value.
Claims (2)
1. a double fuel railroad fuel mode switching system, it is characterized in that, described double fuel locomotive comprises motor, engine electric spray controller, engine controller, LNG tank, and described switched system comprises feed flow cut-off valve, vaporizer, safety valve, air inlet electromagnetic valve, diffusion valve, methane detection system, locomotive microcomputer;
LNG tank, feed flow cut-off valve, vaporizer are connected in turn by LNG pipeline, and vaporizer safety valve, air inlet electromagnetic valve, diffusion valve, motor are connected in turn by methane gas pipeline;
The methane detection main frame that methane detection system comprises the some methane transducers be distributed on locomotive, communicates to connect with each methane transducer;
Described locomotive microcomputer and engine electric spray controller, methane detection main frame, engine controller communicate to connect;
Engine electric spray controller is used for sending double fuel enable signal to microcomputer.
2. double fuel railroad fuel mode switching system as claimed in claim 1, it is characterized in that, also comprise Manual drain valve, described Manual drain valve is between safety valve and air inlet electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520852982.7U CN205089484U (en) | 2015-10-30 | 2015-10-30 | Two fuel locomotive fuel mode switch systems |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520852982.7U CN205089484U (en) | 2015-10-30 | 2015-10-30 | Two fuel locomotive fuel mode switch systems |
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| CN205089484U true CN205089484U (en) | 2016-03-16 |
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| CN201520852982.7U Active CN205089484U (en) | 2015-10-30 | 2015-10-30 | Two fuel locomotive fuel mode switch systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017071538A1 (en) * | 2015-10-30 | 2017-05-04 | 中车资阳机车有限公司 | Dual-fuel locomotive fuel mode switching system and switching method |
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- 2015-10-30 CN CN201520852982.7U patent/CN205089484U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017071538A1 (en) * | 2015-10-30 | 2017-05-04 | 中车资阳机车有限公司 | Dual-fuel locomotive fuel mode switching system and switching method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |