Emergency shutdown electromagnetic valve loop failure switching and alarming circuit of diesel engine and method thereof

Abstract

The invention discloses an emergency shutdown electromagnetic valve loop failure switching and alarming circuit of a diesel engine and a method thereof. The circuit comprises an emergency shutdown electromagnetic valve loop which is connected with an undercurrent detection current relay and an overcurrent detection current relay in series, an emergency shutdown standby electromagnetic valve loop,an emergency shutdown electromagnetic valve overcurrent switching control loop, an emergency shutdown electromagnetic valve undercurrent switching control loop, a relay used for detecting the failureof a shutdown power source and switching the shutdown power source to a standby power source for power supply, and an alarm loop under the situations of power loss of the shutdown power source, an emergency shutdown electromagnetic valve overcurrent and an emergency shutdown electromagnetic valve undercurrent; and the method thereof comprises the steps that when the shutdown power source is in failure, the shutdown power source is directly switched to the standby power source for power supply, during an emergency shutdown, when the emergency shutdown electromagnetic valve is in undercurrent orin overcurrent, the emergency shutdown electromagnetic valve is switched to the standby electromagnetic valve for emergency shutdown, when the emergency shutdown electromagnetic valve is in overcurrent, the loop of the emergency shutdown electromagnetic valve is cut off for protection, and during a non-emergency shutdown period, the situation that an overcurrent alarm lamp is turned on not only shows that the emergency shutdown electromagnetic valve loop is in overcurrent, but also shows a failure and a short circuit of the switch module which controls the emergency stop electromagnetic valveloop.

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 all the existing problems and defects of a diesel engine emergency stop solenoid valve circuit failure alarm circuit and its alarm method with the patent application number of 201510846141. The electricity generated by the engine is directly powered, and the alarm light indicator cannot be seen after the emergency stop of the diesel generator, because the user cannot stare at the alarm light when controlling the emergency stop of the diesel generator, and only pay attention to the alarm light after the emergency stop Indicates the status, but the diesel generator does not generate electricity after an emergency stop, so why is there power output

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