JPH0439585Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a diagnostic device for discovering so-called latent abnormalities that are not displayed on the alarm device of an emergency private power generation facility.

[Conventional technology and its issues]

Conventionally, emergency private power generation equipment has been used to ensure the operation of smoke evacuation equipment and water pumps used in the event of a building fire, or various computers (e.g. ticket vending computers) during a commercial power outage. It is configured to be ready for immediate operation. For example, according to the Fire Service Act, diesel engines used as the drive source for emergency private backup generators for fire protection must reach their rated speed within 10 seconds after starting. .

On the other hand, since it is extremely rare for an emergency situation to occur in such emergency private power generation equipment,
It is unavoidable to leave it unattended for a long time, and as a result, there is no lubricating oil in the rotating parts, causing the rotating parts to run out of oil and the electrical contacts to rust, and in the event of an emergency, the diesel engine There is no guarantee that the entire equipment will start up. Therefore,
Emergency in-house power generation equipment is required to be tested and started at regular intervals. In this inspection test, the starting of the diesel engine is automatically checked manually or unattended, the defective parts are indicated by an alarm device, etc., and the said parts are inspected and repaired (for example, (see publication).

However, such conventional inspection tests only check whether the diesel engine starts or not, and do not check to what extent the diesel engine has deteriorated and become insensitive to starting. Therefore, such conventional inspection tests were not test tests that ensured that normal power generation would be possible next time.

For example, in a private power generation facility consisting of a diesel engine to which a starter motor is attached and a generator driven by the diesel engine, startup detection means for detecting startup of the starter motor;
The starter motor consists of an output voltage detection means for detecting a predetermined voltage generated by the generator, and a timer means for measuring the time from the start of the starter motor to the time when the output voltage is detected, which is detected by these detection means. If the generator voltage does not reach the set value even after a certain period of time has passed after startup, the starter motor is stopped, the battery voltage is restored, and then a stop signal is sent to the diesel engine.
A so-called starting congestion detection circuit has been proposed (see Japanese Utility Model Application Publication No. 101368/1983).

If such a proposal is applied to a periodic inspection test device for emergency private power generation equipment, the time from starting the starter motor to the point at which the output voltage is generated is limited to a fixed value, so if this fixed value is strictly Even with a diesel engine that has good startability, in actual equipment that requires a cranking speed of several tens of rpm or more, a stop signal is always given to the starter motor, and therefore the entire equipment must be inspected and repaired, making it difficult to put into practical use. Furthermore, if a large tolerance is set for this constant value, it is possible to check whether the engine will start or not, but it is unclear to what extent the diesel engine or generator has deteriorated. ,
Therefore, there is no guarantee that normal power generation will always be possible in the event of an emergency.

[Means to solve the problem]

Therefore, this invention was devised to solve such problems, and its gist is as follows:
A start command detection means 4 receives any one of the power outage signal 1, fire signal 2, or test start signal 3 and outputs a start command signal 9 to a timing device 11, and is activated by the start command signal 9. When a diesel engine equipped with a starter motor, a generator driven by the diesel engine, and a voltage 6 generated from the generator are input and the voltage 6 exceeds a predetermined voltage, a power generation establishment signal is generated. 10 to the clock device 11 and the latch circuit 13; an oscillator 7 that outputs clock pulses of a constant period to the clock device 11 upon generation of the start command signal 9; and a clock pulse from the transmitter 7. In the input state, the number of clock pulses from the time when the start command signal 9 outputted from the start command detection means 4 is input to the time when the power generation establishment signal 10 is input is counted, and the cumulative number of clock pulses is calculated. a clock device 11 that outputs a counter output signal 12 to the latch circuit 13;
a latch circuit 13 that takes in a counter output signal 12 from the clock device 11 and outputs the counter output signal 12 as a latch output signal 14 when the power generation establishment signal 10 is input from the power generation establishment detection means 5; The diagnostic device for emergency power generation equipment includes a display device 15 that displays the time measurement results of the contents of the signal 14 together with the stored previous time.

[Effect]

In emergency private power generation equipment already installed in buildings and the like, a diesel engine is started by a starter motor, but first, the starting point of the starter motor is detected. Next, the diesel engine increases to the rated speed, and if there is a defective part in the diesel engine during that time or during rated operation, an alarm is activated, so the operation is stopped and the defective part is repaired. If this alarm device does not work,
A predetermined voltage is generated from the generator.

Therefore, the time point at which this output voltage occurs is detected, the elapsed time between this and the start-up time point is detected, and this time is stored and displayed. Next, for the next operation, detect the same required time, compare the required time between this time and the next time, and set the alarm system in the emergency private power generation equipment depending on whether it is steady or long or short. Diagnose whether there are any potential defects that are not displayed.

〔Example〕

Hereinafter, the structure and operation of the present invention will be described in detail based on examples.

The emergency in-house standby power generation equipment of this embodiment is constructed by directly connecting a generator to a diesel engine, and is installed in a basement of a building or the like.

Now, in FIG. 1, when any one of the power outage signal 1, fire signal 2, or test start signal 3 is input to the start command detection circuit 4, the start command signal 9 from the start command detection circuit 4 causes the clock pulse The clock device 11 that counts 8 becomes ready for time measurement, and this clock device 11 starts counting the clock pulses 8 of a constant period output from the oscillator 7.

On the other hand, a start command signal 9 is given to this power generation equipment by signals such as the above-mentioned power outage signal 1 or fire signal 2. This drives the fuel injection pump (not shown) of the diesel engine, as well as the starter motor that receives power from the battery and the fuel cut solenoid (both not shown) for a certain period of time.
is driven, and the initial excitation switch of the generator directly connected to the diesel engine is turned on. Through these series of sequence controls, this diesel engine starts rotating (starts by continuing to ignite).

Next, in the generator directly connected to this, when the engine speed further increases, a generator voltage 6 is generated, and the voltage reaches a preset voltage (for example, 80% of the rated voltage) by the generation establishment detection circuit 5. The clock pulse 8 continues to be counted by the clock device 11 until the time. When the output voltage 6 of this generator reaches a preset voltage, a power generation establishment signal 10 is generated and the counting by the timer 11 is also stopped. The counter output signal 12 of the time measurement result is taken into the latch circuit 13, and the contents of the latch output signal 14 of the time measurement result of the latch circuit 13 are displayed on the display device 15, for example, a display on the panel surface, or printed on a printer, etc. to be displayed.

For example, if the period of the clock pulse 8 is 0.1 ms, t ₃ in FIG.
The seconds will be displayed, and this display will be stored until the next time the power generation equipment is started up. Here, FIG. 2 is an example of a time chart displayed on the display device 15, where A is a display of the start command signal 9, B is a display of the power generation establishment signal 10, and C is a display of the clock pulse 8. Therefore,
It represents the count time D from the time t ₁ when the startup command signal 9 is input until the generator voltage 6 is established at the time t ₂ . E is the latch output signal 14 of the previous counter time display _E1 and the current count time display _E2 .
represents. Note that E ₃ is the display from the time before last.
Therefore, if the count time D is almost constant, that is, if E ₁ = E ₂ = E ₃ , it can be determined that the entire equipment including the engine is in a normal state, and there is a tendency that this time will gradually become longer. This suggests that the entire equipment, including the diesel engine, is approaching an abnormal state.

[Effect of idea]

According to the present invention, the following effects can be obtained.

By comparing the time it takes from the start of the starter motor to the establishment of the output voltage of the generator at a predetermined interval with the previous operating data,
The time for each operation of the power generation equipment is confirmed, and depending on whether this time is steady or long or short, the alarm system attached to the emergency power generation equipment (for example, low or deteriorated lubricating oil pressure, defective battery, or engine cooling) is detected. alarm system for water shortages, etc.)
Even if the system does not operate in particular, it is possible to easily perform a detailed diagnosis to determine whether there is a high possibility of malfunction occurring in the near future. In other words, potential abnormalities can be discovered.

Since the number of clock pulses accumulated by the latch output signal is displayed over time on the display device, after the start command signal is generated in the power generating equipment, the starter motor, the diesel engine started by this, and the diesel engine The generator thus driven and the generation establishment detection circuit of this generator operate in sequence, and during the elapsed time,
It is a good match for diagnostic equipment because it matches well with the extremely short time it takes for the output voltage to be established after starting the starter motor of the emergency power generation equipment, and the previous time and the current time can be clearly compared. It can be made into the property of

[Brief explanation of the drawing]

Figure 1 is a block diagram of an embodiment of the present invention, and Figure 2 is a time chart of the display device in Figure 1.
This is an example. 4... Start command detection circuit, 5... Power generation establishment detection device, 9... Start command signal, 10... Power generation establishment signal, 11... Timing device, 15... Display device.

Claims (1)

[Scope of claim for utility model registration] Power outage signal 1, fire signal 2 or test start signal 3
a starting command detecting means 4 which outputs a starting command signal 9 to a timing device 11 when any one of the signals is input thereto; a diesel engine equipped with a starter motor that is started by the starting command signal 9; and the diesel engine. a generator driven by a generator; and when a voltage 6 generated from the generator is input and the voltage 6 exceeds a predetermined voltage, a power generation establishment signal 10 is output to a timing device 11 and a latch circuit 13. power generation establishment detection means 5; and a transmitter 7 that outputs a clock pulse of a constant period to the timing device 11 upon generation of the start command signal 9.
The clock pulse is inputted from the transmitter 7, and the clock pulse is generated between the time when the start command signal 9 outputted from the start command detection means 4 is input and the time when the power generation establishment signal 10 is input. a clocking device 11 that counts the number of integrated clock pulses and outputs a counter output signal 12 of the integrated clock pulse number to the latch circuit 13; 10 is input, a latch circuit 13 outputs the counter output signal 12 as a latch output signal 14, and a display device 15 that displays the time measurement result of the contents of the latch output signal 14 together with the stored previous one. A diagnostic device for emergency power generation equipment consisting of and.