CN214066174U - Multi-dimensional automatic safety control system for fuel cell engine test bench - Google Patents
Multi-dimensional automatic safety control system for fuel cell engine test bench Download PDFInfo
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- CN214066174U CN214066174U CN202023255963.6U CN202023255963U CN214066174U CN 214066174 U CN214066174 U CN 214066174U CN 202023255963 U CN202023255963 U CN 202023255963U CN 214066174 U CN214066174 U CN 214066174U
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Abstract
The utility model provides an automatic safety control system of multidimension degree for fuel cell engine test rack, including sensing unit, electrical unit, alarm unit, execution unit, scram unit, electrical unit is connected with sensing unit, scram unit, alarm unit, execution unit electricity respectively, alarm unit and execution unit electricity are connected, still include load cell, hydrogen supply system, fuel cell engine, execution unit is connected with hydrogen supply system, fuel cell engine electricity respectively, load cell is connected with scram unit, electrical unit electricity respectively. When abnormal conditions such as hydrogen leakage, pressure, temperature and the like occur, the system can quickly react, and can stop hydrogen supply by cutting off the hydrogen supply system, so that the danger caused by hydrogen leakage is fundamentally avoided, the danger grade division is strict, and when the most serious condition occurs, the whole system, the hydrogen supply system and the engine can be cut off, and the safety of equipment and personnel is protected as much as possible.
Description
Technical Field
The utility model belongs to the technical field of fuel cell, concretely relates to automatic safety control system of multidimension degree for fuel cell engine test rack.
Background
In a fuel cell engine test bench performance measurement experiment, hydrogen energy needs to be transmitted to an engine through a bench, although the existing test bench is provided with a hydrogen concentration detector to carry out bench safety protection, certain defects exist in protection instantaneity, comprehensiveness and protection strategies, and therefore a safety protection system with the advantages of being rapid in response, comprehensiveness and the like is needed in bench testing to protect the safety of the bench and operators.
Chinese patent CN209992845U discloses a safety control system for a fuel cell test bench, which is provided with a detection unit, a control unit, an execution unit, an emergency stop switch, an ac/dc converter, and an alarm component, and the system realizes the hydrogen concentration detection, automatic alarm and automatic control functions of the application environment of the test bench while providing the emergency stop control of a power distribution system, but the safety control system only cuts off the power supply component of the test bench when hydrogen leaks, the power supply component refers to an electromagnetic valve and other electric control devices, besides the electromagnetic valve, there are many valves needing manual adjustment on a hydrogen delivery pipeline, and the valves are not controlled to be closed, so that the danger of continuous leakage still exists, when the leakage value reaches a certain limit, explosion may be caused, and the danger is extremely large. Therefore, a safety control system for a fuel cell engine test bench having comprehensive safety protection measures and a rapid protection function is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automatic safety control system of multidimension degree for fuel cell engine test rack overcomes current fuel cell test rack safety control system and does not have problem comprehensive, quick protect function.
The utility model provides a pair of automatic safety control system of multidimension degree for fuel cell engine test rack, including sensing unit, electrical unit, alarm unit, execution unit, scram unit, electrical unit is connected with sensing unit, scram unit, alarm unit, execution unit electricity respectively, alarm unit and execution unit electricity are connected, still include load cell, hydrogen supply system, fuel cell engine, execution unit is connected with hydrogen supply system, fuel cell engine electricity respectively, load cell is connected with scram unit, electrical unit electricity respectively.
Preferably, the sensing unit includes at least one of a flow meter, a pressure sensor, a temperature sensor, and a humidity sensor.
Preferably, the alarm unit includes a sound unit and a light unit.
Preferably, the explosion-proof door is further included, and the explosion-proof door is electrically connected with the electronic control unit.
The utility model has the advantages that:
when abnormal conditions such as hydrogen leakage, pressure, temperature and the like occur, the system can quickly respond, and hydrogen supply can be stopped by cutting off the hydrogen supply system, so that the danger caused by hydrogen leakage is fundamentally avoided, the danger grade division is strict, and when the most serious condition occurs, the whole system, the hydrogen supply system and the engine can be cut off, and the safety of equipment and personnel is protected as much as possible; the electric control unit can respectively control according to the alarm grade division made before, so that unnecessary over-protection or incomplete protection can be avoided; when the unavoidable problem occurs, if the risk of explosion occurs, the electric control unit can also control the explosion door to rapidly descend, so that the injury to irrelevant personnel and equipment is avoided; the safety consideration is comprehensive, and any possible damage to equipment or personnel is taken into consideration, so that the safety is extremely high.
Drawings
Fig. 1 is a schematic diagram of the structure of the multidimensional automatic safety control system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the scope of the invention.
Examples
Referring to fig. 1, the multi-dimensional automatic safety control system for the fuel cell engine test bench of the embodiment includes a sensing unit, an electric control unit, an alarm unit, an execution unit, a load unit, a hydrogen supply system, and a fuel cell engine, wherein the electric control unit is respectively electrically connected with the sensing unit, the emergency stop unit, the alarm unit, the execution unit, and the alarm unit, the alarm unit is electrically connected with the execution unit, the execution unit is respectively electrically connected with the hydrogen supply system and the fuel cell engine, and the load unit is respectively electrically connected with the emergency stop unit and the electric control unit.
The electronic control unit receives the signal output of the sensing unit, and as a preferred implementation manner of the embodiment, the sensing unit comprises at least one of a flow meter, a pressure sensor, a temperature sensor and a humidity sensor. Therefore, the sensing unit collects signals of hydrogen flow, pressure, temperature, humidity and the like of the fuel cell engine test bench and uploads the signals to the electronic control unit for judgment. When the fuel cell engine runs normally, the electronic control unit also controls the execution unit to act and is used for simulating the action of each part of the fuel cell engine under the condition of test run, the parts comprise each electromagnetic valve, an electric regulating valve, a pressure reducing valve, a throttle valve and the like, and when the fuel cell engine runs normally, the electronic control unit also controls the load unit to run according to the working condition and verifies the working performance of the fuel cell engine. When the hydrogen concentration is abnormal, if ventilation is poor, explosion can be caused, and the electric control unit can control the alarm unit to alarm according to the grade.
The electric control unit can set a three-level alarm mode comprising a first-level alarm, a second-level alarm and a third-level alarm, and when the alarm level is less than 1, the test bench operates normally without alarm; when the alarm grade is more than or equal to 1, the leakage of the hydrogen amount is more than or equal to 800ppm and less than 5000ppm, the alarm belongs to first-level alarm, the alarm grade is only displayed on the electric control unit, and an operator is reminded to check the hydrogen supply pipeline; when the alarm grade is more than or equal to 2, the leakage of hydrogen is more than or equal to 5000ppm and less than 10000ppm at the moment, the alarm belongs to secondary alarm, the electric control unit controls the execution unit to act to cut off the hydrogen supply system, the hydrogen supply stops, hidden dangers are solved fundamentally, and the safety can be ensured to the maximum extent; when the alarm grade is more than or equal to 3, the hydrogen leakage is more than or equal to 10000ppm at the time, the three-grade alarm is realized, the electric control unit controls the fuel cell engine to be closed and directly closes the load unit or closes the load through the emergency stop unit while controlling the execution unit to cut off the hydrogen supply system.
The emergency stop unit is used for controlling the system to stop running manually or under the control of the electronic control unit when an emergency situation occurs.
The load unit is a device which supplies high-voltage power to the fuel cell when the fuel cell is started and absorbs energy generated during the operation of the fuel cell. The working conditions of the load unit are as follows: and (3) load change working condition: the fuel cell suddenly pulls from low power to high power; dynamic working conditions: the fuel cell has short operation time under different powers and has more power points; steady state conditions: the fuel cell runs for a long time under different powers, and the power points are few; peak working condition: fuel cells operate at high power for a period of time. The load unit simulates the consumption of the vehicle in the actual operation, absorbs the energy generated by the fuel cell, can simulate the actual condition of the vehicle in the operation process, and can verify the state of the vehicle in the actual use process by testing different working conditions of the fuel cell.
As a preferred embodiment of this embodiment, the alarm unit includes a sound unit and a light unit.
As a preferred embodiment of the present embodiment, the explosion-proof door is further included, and the explosion-proof door is electrically connected with the electronic control unit. When a secondary alarm is triggered, the light-emitting unit works and twinkles to remind an operator; when the three-level alarm is triggered, the light-emitting unit and the sound-producing unit work simultaneously to remind an operator of light flicker and alarm bell, and meanwhile, the explosion-proof door is closed.
The working principle of the dimension automatic safety control system of the embodiment is as follows: the execution unit acts according to the instruction through the set operation working condition, the fuel cell engine starts to operate, the hydrogen supply system provides a hydrogen gas source for the fuel cell engine, the load unit consumes the energy of the fuel engine according to the working condition, when abnormal conditions such as serious hydrogen leakage, overlarge pressure, overhigh temperature and the like occur, the sensing unit collects abnormal values and sends the abnormal values to the electronic control unit, the electronic control unit sends the instruction to the alarm unit according to the set alarm level and controls the emergency stop unit to emergency stop the whole dimension automatic safety control system, the load unit is controlled to stop working, the hydrogen supply system stops supplying hydrogen, and the fuel cell engine stops operating.
Claims (4)
1. The utility model provides an automatic safety control system of multidimension degree for fuel cell engine test bench, includes sensing unit, electrical unit, alarm unit, execution unit, scram unit, electrical unit is connected with sensing unit, scram unit, alarm unit, execution unit electricity respectively, alarm unit and execution unit electricity are connected, its characterized in that: the hydrogen supply system is characterized by further comprising a load unit, a hydrogen supply system and a fuel cell engine, wherein the execution unit is electrically connected with the hydrogen supply system and the fuel cell engine respectively, and the load unit is electrically connected with the emergency stop unit and the electric control unit respectively.
2. The multi-dimensional automatic safety control system for a fuel cell engine test rig of claim 1, wherein: the sensing unit comprises at least one of a flowmeter, a pressure sensor, a temperature sensor and a humidity sensor.
3. The multi-dimensional automatic safety control system for a fuel cell engine test rig of claim 1, wherein: the alarm unit comprises a sound production unit and a light emitting unit.
4. The multi-dimensional automatic safety control system for a fuel cell engine test rig of claim 1, wherein: the explosion-proof door is electrically connected with the electric control unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023255963.6U CN214066174U (en) | 2020-12-29 | 2020-12-29 | Multi-dimensional automatic safety control system for fuel cell engine test bench |
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| CN202023255963.6U CN214066174U (en) | 2020-12-29 | 2020-12-29 | Multi-dimensional automatic safety control system for fuel cell engine test bench |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709443A (en) * | 2022-02-23 | 2022-07-05 | 浙江科技学院 | Fuel cell test system safety alarm module based on PLC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709443A (en) * | 2022-02-23 | 2022-07-05 | 浙江科技学院 | Fuel cell test system safety alarm module based on PLC |
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