JPS609700Y2 - Oil amount measuring device and water contamination detection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil amount measuring device and water contamination detection device, and an object of the present invention is to obtain a compact and highly reliable device using a simple float and electrodes.

First, the prior art will be explained with reference to FIG.

FIG. 1 is a cross-sectional schematic diagram showing a conventional oil amount measuring device, in which 1 is an oil tank, 2 is oil, 3 is a float, 4 is a variable resistor, and 5 is a variable variable movement amount of the float 3. The lever 6 that converts and transmits the rotational movement of the resistor 4 is a resistance value measuring device.

Next, to explain the operation, when there is a large amount of oil, the oil level is also high, so the float 3 is in the upper position. However, as the oil gradually decreases during use, the oil level drops and accordingly. Then, the float 3 also lowers, and the rotation axis of the variable resistor 4 rotates to the left, so that the resistance value decreases.

Then, this resistance value is read by the resistance value measuring device 6,
By forming a scale for the amount of oil in proportion to the resistance value, the amount of oil can be determined directly.

However, in this type of oil level measuring device, the variable resistor 4 must be rotated by the force of the float 3, so the float 3 must be made large to some extent, and the amount of movement of the float 3 must be controlled by the variable resistor 4. There are disadvantages such as the need to lengthen the lever 5 which directly transmits the rotational force of the variable resistor 4, and the sliding torque of the variable resistor 4 increases over time and becomes unable to operate normally. .

The present invention has been made in view of the above points, and provides a device that combines a small oil amount measuring device with a simple structure and a water contamination detection device that detects when water is mixed in oil. It is something to do.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a schematic cross-sectional view of an oil amount measuring device and water contamination detection device showing an embodiment of the present invention.

In the figure, parts having the same functions as those of the conventional example shown in FIG. 1 described above are given the same numbers, and detailed explanations are omitted.

1' is a separate tank or an oil tank built into the main body of an oil stove or the like.

1" is formed on the lower side of this oil tank body 1',
This water reservoir has a smaller diameter than the upper part, and if water is mixed in the oil, only water 7 with a heavy specific gravity will collect in this water reservoir 1', separated from the oil. It has become.

Reference numerals 8 and 8' designate electrodes attached to the bottom of the water reservoir, the tips of which protrude slightly so as to come into contact with the water 7 in the water reservoir 1#.

Reference numeral 9 denotes an insulating partition wall, which partially forms the water reservoir section 1''.

A drain pipe 10 is connected to the side wall of the tank body at a position slightly lower than the tip 9' of the partition wall 9.

In FIG. 2, the water 7 in the water reservoir 1'' is shown to be slightly lower than the tip 9' of the partition wall 9, and the electrodes 8 and 8' are completely insulated by the partition wall 9. has been done.

That is, when the water 7 in the water reservoir 1'' exceeds the tip 9' of the partition wall 9, the electrodes 8, 8' become electrically conductive due to the water 7.

Reference numeral 11 denotes a moving electrode formed integrally with the float 3. For details, as shown in the cross-sectional view of FIG. ．． 14. 15. 16. 17. and 18 are conductive parts, and the parts not shaded are insulating parts.

Resistances 19, 20, 21, 22, and 23 have values considerably larger than the electrical resistance of water.

Next, the operation of the embodiment of the present invention having the above configuration will be explained.

First, when oil remains up to the position shown in FIG. It is not in contact with the water surface of 1" of water 7.

Therefore, the electrical resistance between the electrodes 8 and 8' becomes infinite.

Although not shown, in the resistance measuring device 6, if a scale or instruction is provided so that the oil amount is approximately full when the electrical resistance becomes infinite, the oil amount can be determined by directly reading the resistance value.

Now, as the amount of oil decreases, the movable electrode 11 descends together with the float 3, and finally the tip of the movable electrode 11 comes into contact with the water surface, and the resistance between the electrodes 8 and 8' becomes the resistance 19,
It is the sum of 20, 21, 22 and 23 and the electrical resistance of water.

When the oil further decreases and the conductive part 17 comes into contact with the water surface, the resistance between the electrodes 7 and 7' becomes smaller than the resistances 20, 21, 22 and 23.
and the electrical resistance of water, and the resistance is reduced by 19.

Similarly, when the oil further decreases and the conductive portion 16 comes into contact with the water surface, the electrical resistance between the electrodes 7.about.7' decreases by the amount of the resistance 20.

In this way, the relationship between the amount of oil and the electrical resistance between the electrodes 7, 7' has a step wave shape as shown in FIG. 4, and the amount of oil can be read digitally.

By the way, when a large amount of water accumulates in the water reservoir 1', the water exceeds the tip 9' of the partition wall 9, and the electrical resistance between the electrodes 8 and 8' becomes only the electrical resistance of the water, which is indicated by the broken line in FIG. As shown in A, the value is quite small.

Therefore, if a predetermined amount or more of water has accumulated in the oil, it can be immediately detected by the resistance value measuring device 6, and an alarm device (not shown) can be activated to notify the user of the oil. Together with the resistance value measuring device 6, it is also possible to notify that water has entered the container.

Also, at this time, the cock 10' of the drain pipe 10 mentioned above is
The water can be discharged from the tank body 1 by opening.

FIG. 5 is a schematic cross-sectional view of the moving electrode 11 showing another embodiment of the present invention, in which hatched areas 24 and 24' are resistors, 25 is a resistor, and parts other than the shaded areas are insulating parts.

In this case, the electric resistance is inversely proportional to the surface line of the electrode in contact with water, and the relationship between the oil amount and the resistance between the electrodes 8 and 8' is expressed by an analog waveform as shown in Figure 6. becomes.

When the amount of oil is the lowest, the movable electrode 11 moves to the lowest position, so that the resistance value becomes only the resistance 25, as shown in B of the characteristic diagram in FIG.

As explained above, according to the present invention, water reservoirs are formed at the bottom of the oil tank, separated from each other by a partition wall, and water is stored in each of the water reservoirs to the extent that it does not exceed the partition wall. A U-shaped moving electrode having a float is provided in the tank so as to straddle between the mutual water reservoirs, and the resistance value of this moving electrode is set to be at least greater than the resistance value of the water. By measuring the resistance between the electrodes attached to the bottom of the oil tank, the amount of oil can be measured and the water in the oil tank can be detected.
It is possible to measure the amount of oil and detect the intrusion of water, and the overall structure can be made simple and compact.

[Brief explanation of drawings]

Figure 1 is a cross-sectional schematic diagram of a conventional oil level measuring device;
The figure is a schematic cross-sectional view of an oil amount measuring device and miscellaneous water contamination detection device showing an embodiment of the present invention, FIG. 3 is a sectional view of the main part of the present invention, and FIG. FIG. 5 is a schematic cross-sectional view of the main parts showing another embodiment of the present invention, and FIG. 6 is an oil quantity characteristic diagram thereof, in which 1' is an oil tank, 1' is a water reservoir, 3 is a float, and 7 is an oil quantity characteristic diagram. 8 and 8' are electrodes, 9 is a partition wall, 9' is a tip of the partition wall, and 11 is a moving electrode.

Claims (1)

[Claims for Utility Model Registration] Water reservoirs are formed at the bottom of the oil tank and are separated from each other by a partition wall, and water is stored in each of the water reservoirs to an extent that the water does not exceed the partition wall, and within the oil tank, A U-shaped moving electrode with a float is installed so as to straddle the mutual water pools, and the resistance value of this moving electrode is set to be at least greater than the resistance value of the water. An oil amount measuring device and water contamination detection device characterized by measuring the amount of oil and detecting water in an oil tank by measuring the resistance between attached electrodes.