JPS5836984Y2 - liquid meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a liquid level meter, particularly a liquid level meter used to measure the amount of liquid contained in a container, such as gasoline in a fuel tank of an automobile.

FIG. 1 shows a type of conventional liquid level gauge of this kind, and this liquid level gauge 1 consists of a float 4 floating on gasoline 3 housed in a fuel tank 2 communicating with the atmosphere, and a vertically oriented protective tube. 5, the float 4 is attached to the protective cylinder 5 via a guide rod 6 erected thereto so as to be able to rise and fall freely, and the float 4 is installed so as to be able to rise and fall freely even when the liquid level 16 of the gasoline 3 in the fuel tank 2 fluctuates due to cornering or the like. protected from fluctuations.

Further, a contact piece 7 is fixed to the float 4, and one end of this contact piece 7 is biased so as to be in constant contact with a grounding rod 8, and the other end is always in contact with a sliding resistance plate 9. The amount of gasoline 3 in the fuel tank 2 can be read from the change in resistance value of the sliding resistance plate 9 via an indicator (not shown).

Therefore, when refueling the fuel tank 2 with gasoline 3, approximately 1/4 (l is the length of the protective tube 5) from the bottom cover 10 of the protective tube 5 so that the gasoline 3 quickly flows into the protective tube 5. A pore 12 is provided at a position above the dimension, and when the gasoline 3 in the fuel tank 2 decreases and the liquid level 16' in the protection tube 5 becomes lower than the pore 12, the protection tube The gasoline 3 in 5 flows through the pores 12 provided in the bottom cover 10.
Gasoline flows out little by little through the smaller micropores 11, making it possible to accurately read the amount of gasoline 3 in the fuel tank 2 when it is small.

However, in such a device, both liquid levels 16 and 16' of the gasonone 3 are above the pore 12, and when the liquid level 16 of the fuel tank 2 fluctuates due to cornering etc., the pore 12 is still It is better for the liquid level 16' in the protection tube 5 to fluctuate due to fluctuations in the liquid level 16, causing an error in the indication on the indicator. There was a drawback that the inflow of gasoline 3 was slow and the amount of gasoline 3 could not be read quickly and accurately.

The object of this invention is to provide a liquid meter that can eliminate the various drawbacks of the conventional ones as described above.

This invention will be explained with reference to the embodiments shown in FIGS. 2-7.

In this embodiment, most of the structure is the same as that shown in the first figure, so the same reference numerals are given to those parts and the explanation is omitted, and the main difference is in the structure. Let's explain the parts.

The protective tube 5' is removed by closing the pore 12, and the bottom cover 10 of the protective tube 5' has a cylindrical valve seat 13 extending inside the protective tube 5'. It is installed like this.

A valve 15 made of nylon (specific gravity: 1.12) is attached to the through hole 14 of the valve seat 13 so as to be vertically displaceable.

The valve 15 has a valve plate 17 that abuts against the upper edge of the valve seat 13 to close the through hole 14. A pair of leg portions 18 are provided to fit into each other, and locking portions 19 are provided at the lower ends of both leg portions 18 and projecting laterally, and these locking portions 19 are connected to the valve as shown by chain lines in FIG. When the valve 15 rises and floats, it is engaged with the lower surface of the bottom cover 10 to restrict the valve from floating.

Further, 20 is an air vent hole. Next, the operation of the above will be explained based on FIGS. 2.5.6 and 7.

When the gasoline 3 is refueled into the tank 2, the liquid level 16 of the gasoline 3 in the tank 2 rises, and the liquid level 16 eventually reaches above the bottom cover 10 of the protective cylinder 5'.

At that time, the through hole 14 is closed by the valve 15, so that the gasoline 3 is allowed to pass through the fine hole 11 into the protection tube 5'.
Gasoline 3 gradually flows in, and the liquid level 16' of gasoline 3 gradually rises inside the protective cylinder 5'.

In this way, both liquid levels 16 and 16' rise together, and the height Hl of the liquid level 16 from the upper edge of the valve seat 13 becomes the height H2 of the liquid level 16' from the upper edge of the valve seat 13. The difference between the two △H (=H, -H2) is
When the product ΔH·A with the cross-sectional area A of the through hole 14 becomes larger than the weight W of the valve, the following equation (1) is established and the valve 15 floats as shown in FIG.

△H-A>W...(1) , °, △H>Sheet=△Ho...(1)' This causes the upper edge of the valve seat 13 and the valve plate 17 of the valve 15 to A gap is created between the through hole 14 and the gasoline 3.
quickly flows into the protective tube 5'.

Gasoline 3 is then refilled into tank 2, and both liquid levels reach 16.
．． While the height difference ΔH of 16' is maintained larger than ΔHo (-娶), the valve 15 continues to float and the gasoline 3 flows into the protective cylinder 5'.

Next, when the supply of gasoline 3 to the tank 2 stops, the rise of the liquid level 16 stops, while the liquid level 16' continues to rise, and eventually the height difference △H between the two liquid levels 16 and 16' becomes △H , when the floating valve 15 descends and the valve plate 17 closes the through hole 14. From then on, the inflow of gasoline 3 from the through hole 14 is stopped and a fine hole is formed in the protective cylinder 5'. 11
Gasoline 3 flows in little by little through the liquid level 16.1.
6', the flow of gasoline 3 into the protection tube 5' is stopped (FIG. 2).

When the gasoline 3 is consumed as the vehicle travels and gradually flows out from the tank 2, the through hole 14
Since the is closed by the valve 15, the gasoline 3 flows out little by little from the protective tube 5' into the tank 2 through the fine holes 11, and the amount of gasoline 3 in the tank 2 can be accurately read.

Here, the liquid level 16 in the tank 2 fluctuates drastically due to cornering of the vehicle, etc., and the liquid level 16 may be located below the liquid level 16', as shown in FIG. 6, for example.

Even in this case, the through hole 14 is closed by the valve 15 and the protective cylinder 5
Since the gasoline 3 in the tank 1 only flows out little by little from the fine holes 11, accurate readings can be made as in normal conditions without being affected by fluctuations in the liquid level 16.

Also, contrary to what is shown in FIG. 6, even if the liquid level 16 rises above the liquid level 16' as shown in FIG.
．． As long as the difference △H' of 16' does not exceed △Ho, the through hole 14
Since the opening remains closed, gasoline 3 only flows into the protective cylinder 5' little by little through the fine holes 11, and accurate readings can be made without being affected by fluctuations in the liquid level 16.

Although the above description describes a liquid level meter for reading the amount of gasoline in a fuel tank, it goes without saying that the use is not limited to this type of use.

Furthermore, it goes without saying that members such as valves do not have to be as described above as long as their functions are the same.

This device is as described above, in which a float floating on a liquid to be measured is arranged so as to be movable up and down in a protective cylinder having a flat bottom cover, and this protective cylinder is used to accommodate the liquid to be measured. The liquid to be measured is installed vertically in a container, and the liquid to be measured flows into and out of the protective cylinder through a fine hole provided in the bottom cover, and the amount of liquid to be measured in the container is measured by raising and lowering the float. In this liquid meter, a through hole is provided in the bottom cover, and at least two valve plates 17 are formed in the through hole 14 and extend downward from the lower surface of the valve plate 17, the outer diameter of which is larger than the cross section of the through hole 14. A valve 15 having legs 18 and an arrowhead-shaped locking part 19 provided at the lower end of these legs 18.
The locking portions 19 are restored after passing through the through hole 14 while being pressed in a direction approaching each other, so that the container is attached so as not to be separated from the through hole 14 and to be displaceable in the vertical direction. The valve opens the through hole when the liquid level of the liquid to be measured in the protective cylinder rises above that of the liquid to be measured in the protective cylinder and the difference between the two liquid levels exceeds a predetermined value. When the liquid is stored and supplied to the container,
The liquid to be measured that has been accommodated and supplied to the container flows into the protective cylinder through the through hole in a short time, and the amount of the liquid to be measured in the container can be immediately read after being accommodated and supplied. Even if the level of the liquid to be measured in the container fluctuates due to, for example, the level of the liquid to be measured in the container changes, the valve will not separate from the through hole, and the liquid level in the container will remain at a predetermined level than that in the protective cylinder. Since it will not open unless it becomes larger than the specified value, the level of the liquid to be measured in the protective cylinder will not fluctuate due to fluctuations in the liquid level due to vibrations, and therefore the amount of liquid to be measured in the container can always be maintained. Can be read accurately.

Furthermore, since the bottom cover of the protection tube is flat, the bottom cover can be brought into close contact with the bottom plate of the container, and thereby the float can be lowered close to the bottom plate of the container. It is possible to measure the liquid level near the bottom plate of the container, and the configuration is extremely simple.
It has excellent effects such as easy handling.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional liquid level meter, Fig. 2 is a sectional view showing an embodiment of the liquid level meter according to the present invention, and Fig. 3 is a sectional view showing a conventional liquid level meter.
An enlarged view of part A in the figure, Figure 4 is a perspective view of only the valve, Figure 5 is a perspective view of only the valve.
, 6 and 7 are explanatory diagrams of the same operation. 1...Liquid level meter, 2...Liquid container, 4.
...Float, 5゜5' ...Protective tube, 6
...Guide rod, 7...Touch piece, 8...
...Electrode rod, 9...Sliding resistance plate, 10...
...bottom, 11...micropore, 12...
・Pore, 13... Valve seat, 14...
Through hole, 15... Valve, 16.16'...
-Liquid level, 17...valve plate, 18...leg, 19...locking part.

Claims (1)

[Scope of utility model registration request] A float 4 floating on a liquid to be measured 3 is attached to a bottom lid 1 having a flat plate shape.
The protective tube 5' is vertically installed in the container 2 in which the liquid to be measured 3 is stored, and the In the liquid meter, the amount of the liquid to be measured 3 in the container 2 is measured by raising and lowering the float 4 by causing the liquid to be measured 3 to flow into and out of the protective cylinder 5' through the hole 11. A through hole 14 is provided in the through hole 10, and a valve plate 17 having an outer diameter larger than the cross section of the through hole 14 is provided in the through hole 14, and at least two legs 18 extending downward from the lower surface of the valve plate 7 are provided. An arrowhead-shaped locking portion 1 provided at the lower end of the leg portion 18 of the
By restoring the valve 15 having the locking portions 19 after passing through the through hole 14 while being pressed in a direction in which the locking portions 19 approach each other, the valve 15 can be prevented from separating from the through hole 14 and can be displaced in the vertical direction. When the liquid level 16 of the measured liquid 3 in the container 2 rises above that of the measured liquid 3 in the protective tube 5 and the difference between the two liquid levels 16 and 16' exceeds a predetermined value, the valve 15 A liquid meter characterized in that a through hole 14 is opened.