JPS5818610B2 - Liquid volume measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid that measures the amount of liquid such as urine or sewage from changes in the liquid level filled in a measuring tube.

This invention relates to a quantity measuring device.

Conventionally, the amount of liquid such as urine or sewage has been measured by counting the number of droplets falling from the tip of a tube using a photoelectric counter, and measuring the amount of liquid per drop and the number of drops. was.

However, like this. The method had the following drawbacks.

(1) The amount of liquid per drop is not constant and accuracy is poor.

(2) The hole at the tip of the tube becomes clogged with deposits contained in urine or sewage, making maintenance difficult.

(3) Digital processing using photoelectric counting is required and is expensive.

An object of the present invention is to solve the above-mentioned drawbacks by receiving a measurement liquid in a container having a pressure-receiving membrane, and connecting the measurement liquid through another pressure-receiving membrane provided in close contact with the pressure-receiving membrane. It is an object of the present invention to provide a liquid amount measuring device that measures the amount of liquid from changes in the liquid level in a pipe.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a block diagram of the present invention, and FIG. 2 is a partially detailed block diagram.

1 is a container in which the measurement liquid is placed, 2 is a first pressure-receiving membrane provided at the bottom of the container 1 and movable within a predetermined range, and 3 is a first pressure-receiving membrane.
a second pressure-receiving membrane equivalent to the first pressure-receiving membrane provided in close contact with the pressure-receiving membrane; 4 is a pressure receiver holding the second pressure-receiving membrane 3;
is an air vent, 6 is a communication tube, 7 is a measurement tube, 8 is an electrode rod, 9
is a detector, and 10 is an air hole.

The measurement method is shown next.

Inject a solution such as tap water in advance from the measuring tube 7 side,
The measuring tube 7 and pressure receiver 4 are filled with this solution.

At this time, if air is contained in the solution, the thermal expansion of this air may cause errors, so the air is completely removed using the air vent 5.

In this way, the point where the liquid level of the solution in the measuring tube 7 almost coincides with the height of the second pressure receiving membrane 3 on the upper part of the pressure receiver 4 becomes the zero point.

In this state, urine or waste water to be measured is poured into the container 1.

The injected liquid then pushes down the first pressure-receiving membrane 2, which can move within a predetermined range.

The second pressure receiving membrane 3 provided in close contact with the first pressure receiving membrane 2 transmits pressure to the solution filled in the pressure receiver 4, and communicates with the communication pipe 6.
The liquid level of the solution in the measuring tube 7 is pushed up through the measuring tube 7.

The measuring tube 7 is connected to the atmosphere through an air hole 10,
The liquid level injected into the container 1 and the liquid level in the measuring tube are balanced so that they are equal.

Therefore, if the liquid level is measured as a capacitance change between the measuring tube 7 and the electrode rod 8 provided in the measuring tube 7, the amount of liquid poured into the container 1 will be measured.

Further, the liquid in the container 1 and the solution in the pressure receiver 4 are separated by a first pressure receiving membrane 2 and a second pressure receiving membrane 3.
Since the container 2 is removable, when the container 2 becomes full, it can be easily replaced with another container to continue measurement.

FIG. 3 is a concrete external view of the present invention, in which 11 is a transmission line for transmitting an electric signal from the detector 9, and 12 is an indicator for indicating the liquid level.

In addition, although this example shows liquid level measurement using a capacitance method,
A differential transducer for measuring the liquid level may be provided in the measuring tube for measurement.

As explained in detail above, the present invention receives the measuring liquid in a container having a pressure-receiving membrane, and uses another pressure-receiving membrane provided in close contact with this pressure-receiving membrane to detect changes in the liquid level in the measuring tube. This is a liquid amount measuring device designed to measure the amount of liquid.

Therefore, it has the following excellent practical effects.

(1) Since the liquid amount is detected as the liquid level, it can be measured with high precision.

(2) Since the replacement method uses a pressure-receiving membrane, it is not affected by deposits at all and maintenance is easy.

(3) Since a double pressure-receiving membrane is used, the container can be handled like a normal container, and when one container is full, it can be replaced with another, and the liquid to be measured can be discarded. Easy to handle without dissipating.

(4) Analog measurement is inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a partial detailed block diagram, and FIG. 3 is a specific external view. 1... Container, 2... First pressure receiving membrane, 3
...Second pressure receiving membrane, 4...Pressure receiver, 5.
...Air vent, 6...Communication pipe, 7...
...Measuring tube, 8...Electrode rod, 9...
Detector, 10... Air hole.

Claims (1)

[Claims] 1. In a device that measures the amount of liquid to be measured by changing the liquid level in a measuring tube connected to a pressure-receiving membrane via a communication tube, the pressure-receiving membrane is connected to the bottom of a container into which the measurement liquid is poured. The first pressure receiving membrane is separated into a first pressure receiving membrane provided at the top of the pressure receiver which communicates with the measuring tube and is filled with the liquid, and during measurement: the first and second pressure receiving membranes are separated. A liquid amount measuring device characterized by being brought into close contact with each other.