JP3119053U - Liquid meter - Google Patents

Abstract

Provided is a liquid meter that can be installed even in a tank having a small diameter or a spherical shape without taking up space by reducing the manufacturing cost with a simple structure.
A buoyancy body (1) having a specific gravity greater than that of a liquid to be measured, a holder section (4) for holding the buoyancy body, and the holder section and the buoyancy body are connected to urge the buoyancy body upward. The urging means 2, the contact portion 10 provided at the upper end of the buoyancy body, the fulcrum disposed at two locations inside the holder top lid 11, and the fulcrum disposed between the two fulcrums and the contact portion. The gauge plate 5, the strain gauge 6 affixed to the opposite side of the contact surface of the gauge plate with the contact portion, and calculation software connected to the strain gauge, according to changes in the liquid amount The liquid level is measured and displayed by converting the pressure from the changing buoyancy body into an electrical signal.
[Selection] Figure 1

Description

  The present invention relates to a liquid meter that displays the amount of liquid in an installed kerosene tank or the like.

  A float type is generally used as a mechanism for displaying the amount of liquid in a liquid tank such as an installation type kerosene tank. For example, Patent Document 1 (Japanese Utility Model Laid-Open No. 64-2121) discloses a floating arm provided at one end with a floating element provided in a liquid container so as to be pivotable in the vertical direction and floating on the liquid surface in the liquid container. And a liquid meter having a display portion provided on the upper part of the liquid container in the previous period. Since the float moves up and down according to the increase and decrease of the liquid amount when it floats on the liquid surface, this movement is transmitted to the display unit via the link mechanism.

  Patent Document 2 (Japanese Utility Model Publication No. 7-39713) discloses a water amount measuring instrument for an electric kettle using a buoyancy material, and proposes a mechanism for measuring the amount of water in the electric kettle by raising and lowering the buoyancy material. Has been. However, this “buoyancy product” is “formed from a material whose lower end is floated on the water surface as shown in FIG. 3 and is formed on a flat surface so that the lower end enters under the water surface and does not contact the rice. There is a description. In other words, the buoyant material is lifted up and down completely on the water surface.

  On the other hand, as a liquid level meter using an electric mechanism, a liquid level / liquid level measurement system using a strain gauge type load cell is proposed in Patent Document 3 (Japanese Patent Laid-Open No. 11-72371). . In this invention, a buoyancy weight having an average density similar to that of the liquid to be measured in the tank to be measured is installed vertically long through the string, the opposite side of the string is connected to the load cell, and the buoyancy weight varies depending on the liquid level. Discloses a system for measuring the amount of change in weight by converting it into a voltage.

Japanese Utility Model Publication No. 64-2121 Japanese Utility Model Publication No. 7-39713 Japanese Patent Application Laid-Open No. 11-72371

  In the float type liquid meter as typified by Patent Document 1, the link mechanism must be stored without being in the tank. Therefore, there is a drawback that the tank cannot be installed unless the tank has a certain width or depth.

  In the liquid meter of the type proposed in Patent Document 2, since the slide part including the buoyant material moves up and down, the planar space is small. However, because the vertical movement of the buoyant object is the same distance as the increase or decrease of the water surface, it can be applied to small items such as an electric kettle, but the display part is extremely long when applied to a large item such as a kerosene tank. There is a problem that it becomes long.

  In the load cell type liquid amount measurement system proposed in Patent Document 3, the buoyancy weight is suspended in the tank through the string, so the buoyancy weight is not stable and there is a liquid flow in the tank. However, there is a problem that the buoyancy weight is shaken and an error occurs in the measured value. Therefore, Patent Document 3 proposes the installation of an auxiliary pipe surrounding the buoyancy weight in order to prevent the buoyancy weight from shaking.

  In the load-type cell-type liquid amount measuring system proposed in Patent Document 3, the buoyancy body has a uniform cross-sectional area from the upper end to the lower end, and detects an electrical signal proportional to the change in the liquid level. . If the cross-sectional area of the tank shape is uniform, the amount of liquid can be calculated with a simple calculation.However, if the cross-sectional area of the tank is not uniform, such as a sphere, a calculation that matches the shape of the tank is required. There is a disadvantage that becomes complicated.

  The liquid meter of the present invention has been made in view of the above-mentioned problems, and it is intended to provide a liquid meter that can be installed even in a tank having a small diameter without taking up a place with a simple structure and suppressing manufacturing costs. Let it be an issue.

  In order to solve the above problems, a liquid meter according to the present invention includes a buoyancy body having a specific gravity greater than that of a liquid to be measured, a holder portion for holding the buoyancy body, and the holder portion and the buoyancy body. An urging means for urging the buoyancy body upward, a contact portion provided at an upper end portion of the buoyancy body, fulcrums arranged at two locations inside the upper lid of the holder portion, the fulcrums at the two locations, and the contact points Pressure from a buoyant body that changes according to the change in the liquid amount, and a gauge plate that is attached to the opposite side of the contact surface of the gauge plate with the contact portion. Is converted into an electric signal and the liquid level is measured.

The buoyancy body is characterized in that the pressure from the buoyancy body changes in proportion to the change in the liquid level or the liquid amount.

  Since the liquid meter according to the present invention has a simple structure, it can be manufactured at a low cost. In particular, it is necessary to manufacture from the holder part to the buoyancy body, but since the strain gauge can be connected to a commercially available one, the function of the present invention can be achieved very simply. This makes it possible to remotely monitor the liquid meter by installing it at a location different from the tank.

  FIG. 1 shows a sectional view of an embodiment of a liquid meter according to the present invention. As the structure of this embodiment, the hollow pipe-like buoyancy body 1 is inserted into the through hole of the holder portion main body 4 and extends near the bottom of the container. The upper part of the buoyant body 1 in the holder 4 is engaged with a spring 2 as an urging means, and is fixed to the bottom surface inside the holder to urge the buoyant body upward. On the other hand, a protruding contact portion is formed at the upper end of the buoyancy body 1. Grooves are formed at two locations on the inner surface of the holder upper lid 11, and pins 9 as fulcrums are disposed in the respective groove portions. A flat gauge plate 5 is disposed so as to straddle the two pins 9. When the upper lid 11 is fixed to the holder body, the gauge plate 5 is connected to the buoyancy body contact portion 10 and the two pins 9. A bending load is always applied to the gauge plate in contact with the constant span. A connector terminal extending from the strain gauge 6 via a cord is connected to the calculation software 8 on the opposite surface contacting the contact portion of the gauge plate 5.

  Next, the mechanism of the liquid meter of this embodiment will be described. The buoyancy body 1 is connected to the holder main body 4 through biasing by the spring 2. Accordingly, when there is no liquid in the container 3, the pressure applied to the gauge plate 5 is the lowest. When the amount of liquid in the container increases, the buoyancy body 1 is partially immersed in the liquid, and the buoyancy received from the liquid increases. Along with this, the pressure exerted by the buoyancy body 1 by urging the urging force of the spring 2 increases. The pressure from the buoyancy body is transmitted to the gauge plate 5 through the contact portion 10. Since the gauge plate 5 is supported by the fulcrum of the pin 9, the gauge plate is always subjected to bending load with a certain span. Since the connector terminal 6 extending from the strain gauge 6 through the cord is fixed to the gauge plate 5, the pressure from the buoyancy body 1 is finally transmitted to the calculation software 8 through this connector terminal, and the liquid is calculated by the calculation software. It is displayed on the display unit 7 as a position or a liquid amount.

FIG. 2A shows a cross-sectional view of an embodiment of a liquid meter according to the present invention, and a correlation diagram between a change in the liquid amount and buoyancy applied to the buoyant body. This is an embodiment in which the cross-sectional area of the shape of the buoyant body is uniform and the cross-sectional area of the shape of the tank is uniform.
FIG. 2 (b) shows a cross-sectional view of an embodiment of the liquid meter according to the present invention, and a correlation diagram between the change in the liquid amount and the buoyancy applied to the buoyant body. This is an embodiment in which the shape of the buoyancy body is a buoyancy body shape that changes in proportion to the change in the liquid level or the liquid amount, and the shape of the tank is a sphere.

  Since the liquid meter according to the present invention is simple, compact and does not take up space, it can be used to display the liquid amount in a liquid container such as a kerosene tank. Further, since the liquid level or liquid amount information is converted into an electric signal, the display unit can be installed at a location away from the liquid container.

(A) is a top view which shows one Example of the liquid meter by this invention, (b) is front sectional drawing of the Example. (A) is an electric signal detected by a uniform tank shape and uniform buoyant body, (b) is an electric signal detected by a spherical tank shape and uniform buoyant body, and (c) is detected by a buoyant body according to the present invention. It is an electrical signal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buoyancy body 2 Spring 3 Container 4 Holder part main body 5 Gauge plate 6 Strain gauge 7 Display part 8 Calculation software 9 Pin 10 Contact part 11 Holder upper cover

Claims (2)

A buoyancy body having a specific gravity greater than the liquid to be measured, a holder portion for holding the buoyancy body, and a biasing means coupled to the holder portion and the buoyancy body to bias the buoyancy body upward; Contact points provided at the upper end of the buoyancy body, fulcrum points disposed at two locations inside the holder unit upper lid, gauge plates disposed between the two fulcrum points and the contact points, and the gauge plate Measuring the liquid level by converting the pressure from the buoyant body that changes according to the change of the liquid amount into an electrical signal. Features a liquid meter. A buoyancy body having a specific gravity greater than the liquid to be measured, a holder portion for holding the buoyancy body, and a biasing means coupled to the holder portion and the buoyancy body to bias the buoyancy body upward; Contact points provided at the upper end of the buoyancy body, fulcrum points disposed at two locations inside the holder unit upper lid, gauge plates disposed between the two fulcrum points and the contact points, and the gauge plate Measuring the liquid level by converting the pressure from the buoyant body that changes according to the change in the liquid amount into an electrical signal. A fluid meter characterized by having a buoyancy body shape in which the pressure from the buoyancy body changes in proportion to a change in the liquid level or the liquid amount.

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