JPH026017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] 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 backup power generation facility.

[Conventional technology and its issues]

Conventionally, emergency in-house power generation equipment has been used to reliably and efficiently operate smoke evacuation systems and water pumps used in the event of a building fire, as well as various computers (e.g. ticket vending computers) in the event of 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 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,
As a result, there is no lubricating oil in the rotating parts, causing the rotating parts to run out of oil and rusting on the electrical contacts.In the event of an emergency, the equipment, including the internal combustion engine, will be left unattended. There is no guarantee that the entire equipment will start up. Therefore, emergency private power generation equipment is always used for a certain period of time (interval).
An inspection test is required to be started every time a test is started. In this inspection test, the starting of the internal combustion engine is checked manually or automatically, and defective parts are indicated by an alarm device, and the relevant parts are inspected and repaired (for example, (see publication).

However, such conventional inspection tests only check whether the internal combustion engine starts or not, and do not even check to what extent the internal combustion engine has deteriorated and become insensitive to starting. Moreover, the system does not provide warnings based on checking for defective parts of the entire equipment. Therefore, even if such a conventional inspection test is performed, it is not an inspection test that guarantees that power will be generated normally next time.

On the other hand, one of the tests for internal combustion engines is production testing, which tests whether the produced internal combustion engine has the specified performance in the production factory before shipping. In production tests, conventionally, the rotational speed of an internal combustion engine was, for example, from 1000 rpm.
A diagnosis has been made in which the time it takes for the engine to rise to 3000 rpm is measured, and if this time is within a predetermined standard, the acceleration feeling of the internal combustion engine is good (for example, see Japanese Patent Application Laid-Open No. 1983-63231).

However, even if the method for diagnosing acceleration in production tests is applied to the inspection test of emergency private power generation equipment, in other words, in the inspection test of emergency private power generation equipment, the time required to reach a predetermined engine speed is Even if measured, it is not always possible to obtain a predetermined output voltage, and therefore, the constant operating voltage that is strictly required for various types of computers installed in buildings, for example, is not guaranteed in such emergency private power generation equipment. There is no guarantee that you will receive it immediately.

Moreover, the above-mentioned method for diagnosing acceleration in the production test does not check for defects caused by rusting of electrical contacts or defects in the generator's automatic voltage regulator, so it is not possible to repair such defects. Not useful.

[Means to solve the problem]

Therefore, the present invention was created in view of the deficiencies in various conventional tests, and its gist is as follows: Using the symbols in FIG. In an emergency private power generation facility installed in a building, etc., consisting of a generator c driven by the internal combustion engine b, and an alarm device d activated by a defective part of the engine, the continuous ignition of the internal combustion engine b Starting rotation speed detection means e for detecting a predetermined starting rotation speed, output voltage detection means f for detecting a predetermined output voltage generated by the generator c, and starting rotation speed detection detected by these means. In an emergency private power generation equipment comprising: a measuring means g for measuring the time from a point to an output voltage detection point; and a display means h for storing and displaying the time measured by the measuring means g for each inspection test. It is in the potential abnormality diagnosis device.

[Effect]

When conducting an inspection test on emergency private power generation equipment installed in a building, etc., if the internal combustion engine is driven by the starter, continues to ignite, and reaches a predetermined starting rotation speed, this starting rotation speed is determined. Detect when it becomes. Next, if the internal combustion engine reaches its rated speed and there is a defective part in the internal combustion engine during that time or during rated operation, an alarm will be activated, so this inspection test will be stopped and the defective part will be repaired. However, if this alarm device is not activated, a predetermined output voltage will be generated from the generator.

Therefore, the time point at which this output voltage occurs is detected, the time required between this point and the time point at which the starting speed is reached, and this time is stored and displayed.
Next, at the time of the next inspection test, we will detect the same required time, compare this time required for each inspection test with the next time, and depending on whether the steady state is long or short, we will adjust the alarm system in the emergency private power generation equipment. Diagnose whether there are any potential defects that are not displayed.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a diagnostic device implementing the present invention will be described below with reference to the drawings.

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 a startup command is automatically or artificially given to the emergency private standby power generation equipment at predetermined intervals, the fuel injection pump of the diesel engine is driven, and the battery is also driven. At the same time, starters such as starter motors and initial excitation switches for generators are driven or turned on. Through this series of sequence controls, the diesel engine starts rotating (so-called continuous ignition and starts), and its rotational speed is determined as the output of the Talogi generator, for example.
In other words, it is input as the engine rotational speed signal 1 to the ignition detection circuit 2 that detects the ignition of the engine. Here, the engine rotation speed is set to a preset rotation speed (for example, 2
For cycle engines, when the engine speed reaches 450 rpm, it is assumed that the diesel engine is continuously ignited. Therefore, if the engine is in a continuous ignition state,
Engine ignition signal 3 is activated. As a result, the clock device 9 that performs the counter becomes capable of measuring time, and starts counting the clock pulses 8 of a constant period generated from the oscillator 7.

On the other hand, when the engine speed further increases, the output voltage 4 of the generator is generated, and the voltage set in advance by the generation establishment detection circuit 5 (for example, 80% of the rated voltage) is generated.
%) is reached. When the generator output voltage 4 reaches a preset voltage, the power generation establishment detection circuit 5 generates a power generation establishment signal 6, and as a result, the counter of the above-mentioned timing device 9 stops.

Next, the counter output 10 resulting from the counter is taken into the latch circuit 11. The latch output 12 of the counter result of the latch circuit 11 is displayed on the display device 13.

For example, as shown in FIG. 2, if the period of the clock pulse 8 is 0.1 ms and the latched output 12 is 84, then 8.4 seconds will be displayed on the display 13, and this display will be used for the next inspection. The information is temporarily stored until the test starts.

This display device 13 may be either a display on a panel surface (display surface) or a time chart printed by a printer, one example of which is shown in FIG. That is, in FIG. 2, A is the display of the engine ignition signal 3, B is the display of the power generation establishment signal 6, C is the display of the Krotsu pulse 8, and D indicates the range of the dotted line in FIG. It represents the count time from the point in time when the engine reaches a continuous ignition speed to the point in time when a predetermined generator output voltage is established.

Note that E continues to output the signal of the current count time D to the display device 13 until the next power generation establishment signal 6 becomes high level in the latch circuit 11, and at the time when this power generation establishment signal 6 becomes high level. Thereafter, the signal for the next count time D continues to be output from the latch circuit 11 to the display device 13.

In other words, until the upper and lower solid lines at E intersect
E″ is the count time D in the previous inspection test,
The point E to the right of this intersection point indicates the count time D in the current inspection test.

Therefore, if the count time D in the inspection test at each interval is approximately constant, the entire emergency private power generation equipment can be diagnosed as being in a normal state.On the other hand, if the count time D tends to become longer This suggests that emergency private power generation equipment may lead to abnormal conditions in the future.

〔Effect of the invention〕

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

By measuring the time from when the engine starts to establishing the generator output voltage at predetermined intervals for each inspection test, and by comparing it with the previous inspection test data, The time is confirmed, and depending on whether this time is steady or long or short, an alarm system attached to the emergency power generation equipment (for example, a warning system for low or deteriorated lubricating oil pressure, a defective battery, or a lack of engine cooling water, etc.) However, even if the system does not operate, it is possible to easily conduct 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.

In particular, since the sensor uses a predetermined generator output voltage, which is the output of the emergency power generation equipment, it is important to check whether the constant output voltage strictly required for operating computers installed in buildings etc. can be obtained. This is convenient for inspection tests.

By using the alarm device and the potential abnormality diagnosis device together, it is possible to provide a more reliable emergency private power generation facility.

[Brief explanation of drawings]

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.
For example, FIG. 3 is a block diagram (diagram corresponding to claims) representing the present invention. 2... Ignition detection circuit, 3... Engine ignition signal, 5... Power generation establishment detection circuit, 6... Power generation establishment signal, 9... Timing device, 13... Display device.

Claims (1)

[Claims] 1. An internal combustion engine installed in a building, etc., comprising an internal combustion engine equipped with a starter, a generator driven by the engine, and an alarm device activated by a defective part of the engine. In the emergency private power generation equipment, starting rotation speed detection means detects a predetermined starting rotation speed due to continuous ignition of the internal combustion engine; and output voltage detection means detects a predetermined output voltage generated by the generator. , a clock means for measuring the time from the time when the starting rotation speed detected by these means to the time when the output voltage is detected; and a display means for storing and displaying the time measured by the time measuring means for each inspection test. , A potential abnormality diagnosis device for emergency private power generation equipment.