Solenoid valve circuit failure switching and alarming circuit for diesel engine emergency shutdown and method thereof

Abstract

The invention discloses a solenoid valve circuit failure switching and alarming circuit for diesel engine emergency shutdown and a method thereof. The solenoid valve circuit failure switching and alarming circuit is characterized in that the solenoid valve circuit failure switching and alarming circuit comprises an emergency shutdown solenoid valve circuit, an emergency shutdown standby solenoid valve circuit, an emergency shutdown solenoid valve overcurrent switching control circuit, an emergency shutdown solenoid valve undercurrent switching control circuit, a voltage-type relay, a shutdownpower supply failure alarming circuit, an emergency shutdown solenoid valve overcurrent alarming circuit and an emergency shutdown solenoid valve undercurrent alarming circuit, wherein the emergency shutdown solenoid valve circuit is connected with an undercurrent detection current relay and an overcurrent detection current relay in series; and the voltage-type relay detects shutdown power supplyfailure and switches a power supply to a standby power for power supplying. The method is characterized in that in case of shutdown power supply failure, the power supply is directly switched to the standby power for power supplying, and an indicator light conducts alarming and prompting; during undercurrent or overcurrent of an emergency shutdown solenoid valve, the emergency shutdown solenoid valve is switched to a standby solenoid valve for emergency shutdown, and corresponding alarming and prompting of the indicator light are conducted; and during overcurrent of the emergency shutdown solenoid valve, the emergency shutdown solenoid valve circuit is cut off, and short circuit protection is conducted on the emergency shutdown solenoid valve circuit.

Description

technical field [0001] The invention belongs to the technical field of diesel engine safety protection, and in particular relates to a diesel engine emergency stop solenoid valve circuit failure switch, an alarm circuit and an implementation method thereof. Background technique [0002] At present: the emergency stop system of diesel engine has two ways of cutting off gas and cutting off oil for emergency stopping of diesel engine. An oil cut-off electromagnetic control valve device is installed on the oil circuit, and the oil can be cut off in an emergency when a fault occurs. These solenoid-operated valves are commonly referred to as emergency stop solenoid valves. When the solenoid valve used in the emergency stop solenoid valve is a normally closed solenoid valve, the designed circuit of the emergency stop solenoid valve is a demagnetized (power-off) stop; when the solenoid valve used in the emergency stop solenoid valve is a normally open solenoid valve The designed e...

AI Technical Summary

Problems solved by technology

It seems that the above functions have been realized, but in addition to the existing problems and defects of a diesel engine emergency stop solenoid valve loop failure alarm circuit and its alarm method with the patent application number: 201510846141.X, there is also a diesel power supply for the alarm light The electricity generated by the engine is directly powered, and the warning light indicator cannot be seen after the emergency stop of the diesel generator, because when controlling the emergency stop of the diesel generator, the user cannot stare at the warning light, only after the emergency stop will pay attention to the warning light Indicates the status, but the diesel generator does not generate electricity after an emergency stop, so why is there any power output

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