JPS5834325A - Liquid level detecting method - Google Patents

Abstract

PURPOSE:To find the liquid level in a tank easily by opening the upper ends of a twin type channel-shaped pipe to the air after introducing the liquid in the tank fully into the pipe, and making the liquid level in the tank coincident with that at the part of the channel-shaped pipe opened to the air. CONSTITUTION:A stop valve 11 and a discharge valve 12 are closed firstly and valves 14 and 15 of a by-pass pipe 13 are opened; and a pipe 7 is inserted into a drum can 4 from an air hole 4a and is fixed so that the tip abuts on the bottom part. Then, a manual pump 14 is pressed to suck oil 5 from the tip of the pipe and the oil is flowed through a duct, which is filled with the oil. The valves 14 and 15 are closed lastly and the stop valve 11 is opened to release the suction force, and the tip of a transparent pipe 10 is opened to the air. Consequently, the liquid level of the oil 5 in the transparent pipe 10 falls until it coincides with the liquid level of the oil 5 in the drum can 4.

Description

DETAILED DESCRIPTION OF THE INVENTION This is a method for easily determining the liquid level in a tank, which usually does not require the installation of a glass gauge or the like.

For example, when measuring the liquid level of oil stored in a drum can (2001), a sounding rod is often inserted from the top of the can and the liquid level is determined from the position of the oil that adheres to the rod.

When oil from these drums is used to lubricate various equipment using a pump, the amount of change in liquid level is required to determine the amount of oil to be filled. Therefore, the pump's discharge capacity is roughly estimated, the time is taken into account, the pump is stopped, and a sounding rod is inserted to detect the difference in the liquid level to determine the amount of oil to be added. Therefore, measurements had to be taken many times using a sounding rod, which was extremely time-consuming.

Therefore, there is a method to measure the amount of lubrication by attaching a flow meter to the discharge side of the pump, but since the viscosity of oil varies and the viscosity changes depending on the temperature difference, it is difficult to adjust the flow meter and ensure accurate lubrication. It was difficult to determine the quantity. Therefore, you may end up lubricating equipment with more than the planned amount, and you may have to remove it from the equipment, or the oil may overflow and stain the area around your work area. It was.

The present invention eliminates these drawbacks by storing the liquid in a tank open to the atmosphere.

Insert the lower ends of the two TJ-shaped tubes forming the top and bottom into the liquid until they are submerged in the liquid, introduce the liquid tightly into the two U-shaped tubes, and then The upper end of the tube is opened to the atmosphere to match the liquid level in the tank with the liquid level in the part of the two U-shaped tubes that are open to the atmosphere.The purpose of this is to The present invention provides a liquid level detection method in which changes in the liquid level are detected by guiding the liquid level to the outside.

The method of the present invention will be explained using the principle diagram shown in FIG.

A tank 1 stores a liquid 2 and is open to the atmosphere. 3 is a double U-shaped tube 1c, top 3a, bottom 3b
The lower end 3c and the top 3a, the top 3a and the bottom 311. The distance between the bottom 3b and the top 3d is slightly larger than the height of the tank 1. Note that the space between the bottom portion 3b and the top end 3d of the two U-shaped tubes 3 is formed of a transparent member.

Now, as shown in the figure, the lower ends 3G of the two U-shaped tubes 3 are inserted from the top of the tank 1 and positioned near the bottom of the tank 1.

Next, the liquid 2 is introduced tightly into the two U-shaped tubes 3, and there are various methods for doing so. For example, a suction pump may be attached to the upper end 3d of the two U-shaped tubes 3 to suck the liquid 2, or the liquid 2 may be sucked out by one person's mouth. Also, two U
A pump may be disposed in the middle of the tube 3, for example at the top 3m+ζ, to suck the liquid 2 in the tank 1 and discharge it toward the upper end 3d. Furthermore, the two U-shaped tubes 3 may be tightly filled with the liquid 2 and plugged in advance, and then placed into the tank 1.

In any case, the liquid 2 is tightly introduced into the two U-shaped tubes 3,
After that, the upper end 3d is opened to the atmosphere.

That is, either the suction at the upper end 3d by a suction pump or a person's mouth is stopped, or the suction/discharge from the pump at the top 3B is stopped, or the lower end 3c of the two U-shaped tubes 3.

Just remove the plug at the top end 3d.

If the L end 3d is below the liquid level of the liquid 2, the liquid 2 in the tank 1 will flow out due to the siphon principle, but the upper end 3d
is above the liquid level.

The liquid 2 in the two U-shaped tubes 3 flows into the tank 1. However, due to the balance of forces, it stops at a position midway between the top end 3d and the bottom part 3b, which is the same level as the liquid 2 in the tank 1. Since this part of the two U-shaped tubes 3 is made of a transparent member, the liquid level can be visually detected.

Furthermore, when the liquid level in the tank 1 changes, the liquid level in the two U-shaped tubes 3 also follows, so for example, the amount of oil flowing out from the tank 1 (the amount of oil filled) can be determined from the change in the liquid level. .

The liquid level in the two U-shaped tubes can be detected visually using a transparent member, or if the two U-shaped tubes are non-magnetic, a magnetic float can be placed inside the tubes. You can also check the position of the float from the outside using a piece of iron, but there are various ways to do this.

Next, the present invention will be further explained using an example of an apparatus that embodies the method of the present invention.

4 is a 2001 drum in which oil 5 is stored.

The two U-shaped tubes 6 are tubes 7. Connecting pipe 8. Tube 9. A connecting pipe 8 is composed of a transparent pipe 10 and forms a top portion 6a.
A stop valve 11 is interposed in the bottom part 6b.
A discharge valve 12 is installed at the junction of the tube 9 and the transparent tube IO that form the
are installed in succession.

Note that the tip of the tube 7, which is the lower end 6c, is provided with a notch so that the oil 5 can be sucked even if it comes into contact with the bottom surface of the drum can 4, and the tip of the transparent tube 10, which is the upper end 6d, is provided with a notch so that the oil 5 can be sucked even if it comes into contact with the bottom surface of the drum can 4. 5 is formed downward so that it can be discharged.

A bypass pipe 13 is connected to both ends of the communication pipe 8, and a pair of valves 14. 15 are provided.

The manual pump 14 is usually made of plastic used for oil lubrication, and includes an air valve 14a, a pair of valves 14b,
14c.

Now, when detecting the liquid level of the oil 5 in the drum can 4, the stop valve 11 and the discharge valve 12 are closed.

Open the valves 14 and 15 of the bypass pipe 13, insert the pipe 7 through the air hole 4a of the drum 4, and fix it so that the tip touches the bottom.

Next, the manual pump 14 is pressed to suck the oil 5 from the tip of the pipe 7, and the bypass pipe 13. Tube 9. Oil 5 is poured into a conduit formed by a transparent tube 10, and the conduit including a communication pipe 8 is made dense with oil 5.

Although it is not possible to push out the air in the pipe all at once due to the capacity of the manual pump 14, there is no problem because the air in the pipe 7.9 is absorbed within the manual pump 14.

Finally, the valves 14 and 15 are closed, the stop valve 11 is opened to release the suction force, and the tip of the transparent tube 1o is opened to the atmosphere. As a result, the liquid level of the oil 5 in the transparent tube 10 decreases and stops when it matches the liquid level of the oil 5 in the drum can 4.

Therefore, the liquid level within the drum 4 is detected.

If you want to find a predetermined amount of oil to be filled from the drum can 4, first adjust the liquid level indicator 16 to the current liquid level, and calculate i = decrease in the liquid level from the cross-sectional area of the drum can 4 to the specified amount of oil. and adjust the liquid level indicator 17 to that position.

When various devices are lubricated from the drum 4 by means not shown, the liquid level in the drum 4 is lowered.

The liquid level within the transparent tube 10 also decreases. Therefore.

When the liquid level in the transparent tube 10 falls to the liquid level indicator 17, the predetermined amount of oil has been filled, so it is sufficient to stop the oil filling.

When the measurement is completed, the oil 5 flows into the drum can 4 by opening the valves other than the discharge valve 12 and pulling up the entire tank. Next, the discharge valve 12 may be opened to return the remaining oil to the A canister 4 which receives the remaining oil.

In this way, the liquid level detection device using the method of the present invention has 9
It can detect the liquid level in drums, etc., which normally do not have a liquid level gauge, and since the liquid level is always displayed, it is also possible to accurately determine the amount of oil to be filled.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the principle of the method of the present invention, and FIG. 2 is a diagram of a preferred embodiment for carrying out the method. 4 double drum cans, 5: oil, 6: double U-shaped tube. 6a゛ top, 6b: bottom, 6c: lower end, 6d: upper end, 7: tube, 8゛ connecting tube, 9: tube, 10: transparent tube, 14
manual pump

Claims (1)

[Claims] In a tank that stores a liquid and is open to the atmosphere. The lower ends of the two U-shaped tubes forming the top and bottom are inserted into the liquid until they are submerged in the liquid, the liquid is introduced tightly into the two U-shaped tubes, and then the two U-shaped tubes are The upper end of the tube is opened to the atmosphere, and the liquid level in the C tank is matched with the liquid level in the part of the two U-shaped tubes that are opened to the atmosphere, and the liquid level in the tank is detected from that liquid level. A liquid level detection method characterized by: