JPS6198928A - Air tank inspector - Google Patents

Abstract

PURPOSE:To inspect an air tank accurately and automatically by deciding the abnormality on the basis of the difference between current and previous pressure levels in the air tank to be employed in emergency generator. CONSTITUTION:An inspection start signal is produced from an inspection starting signal generator 20 and upon provision of an inspection command signal from a clock 21 every predetermined time, pressure signals from pressure detectors 7A, 7B for detecting the air pressure in respective air tank 3A, 3B are fed as electrical pressure signal PN to a controller 22 through pressure signal units 8A, 8B. The controller 22 will operate the difference between previous and current pressure levels PP, PN on the condition that the generator engine is zero. If the difference is higher than predetermined level PO, it is decided to be abnormal to function CRT unit 23, a recorder 24 and an alarm 14 thus to display, record and alarm the abnormality.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inspection device for an air tank used in an emergency power generator or the like.

[Conventional technology]

FIG. 3 shows an emergency power generator to which a conventional air tank inspection device is applied. In Figure 3, 1 is a generator engine, 2
is a starting air control device connected to the generator engine; 3
A and 3B are air tanks that store air to be supplied to the starting air control device 2; 4A and 4B are outlet valves for the air tanks 3A and 3B; 5A and 5B are inlet valves for the air tanks 3A and 3B;
6 is an air compressor that supplies air, 7A and 7B are air tanks 3
Are the pressure detectors installed in A and 3B, and 8A and 8B pressure detectors? A pressure signal device that converts the pressure signal output from 7B into an electric pressure signal, 11 people.

11B is an indicator for instructing an electric pressure signal, 12 is an alarm circuit, 13 is a display device, and 14 is an alarm device.

Emergency power generators are needed when the regular power supply goes out, and are installed in large numbers in buildings and other locations.

Some commonly used engines use gas turbines. This requires a large air source and therefore has one or more air tanks.

Next, the operation of the device configured in this way will be explained. The air produced by the air compressor 6 is supplied to the inlet valve 5A,
The air is stored in air tanks 3A and 3B via outlet valves 4A and 4B, as required, to the starting air control device 2 and sent to the generator engine 1. To determine whether the air in the air tanks 3A and 3B is normal, pressure detectors 7A and 7B are installed here, and the pressure signals output from the pressure detectors 7A and 7B are converted into electrical pressure by pressure signal devices 8A and 8B. This electric pressure signal is used as a signal and the indicator 11A, 1
1B is further sent to an alarm circuit 12, and if there is an abnormality, a display device 13 or an alarm device 14 is used to notify the abnormality.

[Problem that the invention seeks to solve]

As mentioned above, conventional air tank inspection equipment simply detects the instantaneous value of the pressure in the air tank and notifies the operator through alarms, display devices, etc., so whether it is normal or not. It is difficult to judge and predict the future.
There was a problem in that much of it depended on the judgment of the operator.

The present invention has been made in view of these points, and an object thereof is to provide an air tank inspection device that can accurately and automatically check whether an air tank is normal or not.

[Means for solving problems]

In order to solve these problems, the present invention provides a pressure detector that detects the pressure in an air tank and outputs a pressure signal, a pressure signal device that converts the pressure signal into an electric pressure signal, and a periodic inspection command. The apparatus is equipped with a clock that provides a signal, an inspection start signal generator, a control device that inputs an electric pressure signal and the like and outputs an inspection output signal, and an output device that is connected to this control device.

[Effect]

In the present invention, a comparison is made with the previous pressure value based on a regular inspection command signal given by a clock. If the difference between the current pressure value and the previous pressure value is large, it can be considered that some abnormality has occurred.

(Embodiment) Fig. 1 shows an embodiment of the air tank inspection device according to the present invention. In Fig. 1, 2o is an inspection start signal generator that generates an inspection start signal that determines the start of an inspection operation, and 21 is an inspection start signal generator. 22 is a control device that inputs an electric pressure signal, 2nd inspection start signal and an inspection command signal to perform 1st inspection control and outputs the result as an inspection output signal; 23 is for display; CRT device,
24 is a recording device, and an alarm device 14. CRT device 23
．． The recording device 24 constitutes an output device. In FIG. 1, the same or equivalent parts as in FIG. 3 are given the same reference numerals.

FIG. 2 is a flowchart for explaining the operation of the apparatus configured as described above. In Fig. 2, 30 is a step to start the inspection, 31 is a step to check the inspection command signal of the clock 21 to determine the regular time, 32 is a step to read the pressure value of the air tank, and 33 is a step when the engine speed is zero. 34 is the previous pressure value P
2 and the current pressure value P, step 35 calculates the difference ΔP=l PN-P,l and determines whether ΔP>PG.
Step 36 is a step of outputting inspection data when the discrimination result is good at PsPo, step 36 is a step of outputting inspection data when the discrimination result is bad when Δp>po, step 37 is a step of determining the end of a series of operations. be.

Next, the operation of this embodiment will be explained in detail using FIGS. 1 and 2. When a separately prepared inspection start signal is output from the inspection start signal generator 20,
The clock 21 starts measuring time, and the process moves to the next step 32 through a step 31 for determining the set time to detect a certain fixed time, for example, 30 minutes. In this step 32, the electrical pressure signal PN is read. Further, it is determined in step 33 of determining whether the generator engine is rotating that the number of rotations is zero. If the engine is rotating at zero, the difference between the previously measured pressure value P and the current pressure value PM is determined in determination step 34. and its value is a predetermined normal value P.

If it is less than , the process proceeds to step 35 for outputting a good inspection result, and if it is larger, the process proceeds to step 36 for outputting a defective inspection result. In this way, the series of operations is repeated to perform inspections.

In this embodiment, the inspection output signal output from the control device 22 is stored in the storage device 24. CRT device 23. The alarm device 14 may be any device having memory, display, and alarm functions. Further, in this embodiment, a step for determining whether the rotational speed is zero is provided, but depending on the situation, the same effect can be obtained even if the same control is performed regardless of the rotation.

〔Effect of the invention〕

As explained above, the present invention detects changes in the pressure value of the air tank by checking the pressure value at regular intervals, and therefore has the effect of automatically checking whether the air tank is normal or not.

[Brief explanation of drawings]

Fig. 1 is a block system diagram showing one embodiment of the air tank inspection device according to the present invention, Fig. 2 is a flowchart for explaining its operation, and Fig. 3 is an emergency diagram to which the conventional air tank inspection device is applied. FIG. 3A, 3B...Air tank, 7A, 7B...Pressure detector, 8A, 8B...Pressure signal device, 14...Alarm device, 20...Inspection start signal generator , 21・
...Clock, 22...Control device, 23...CR
T device, 24... Recording device.

Claims (1)

[Claims] A pressure detector that detects the pressure in the air tank, a pressure signal device that inputs the pressure signal output from this pressure detector and outputs an electric pressure signal, a clock that gives a regular inspection command signal, and an inspection start signal. an inspection start signal generator that generates an inspection start signal, a control device that inputs the electric pressure signal, the inspection command signal, and the inspection start signal and outputs an inspection output signal, and an output device connected to the control device. The air tank inspection device is characterized in that it performs periodic determination based on the inspection start signal, reads the electric pressure signal, reads the difference in pressure from the previous time, and determines whether it is good or bad based on the difference.