JPH0116485Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a gas-liquid separation device used, for example, in a vacuum car. , relates to a gas-liquid separation device suitable for flow rate measurement.

<Prior Art> Conventionally, when measuring the flow rate using a vacuum car for treating human waste, since the human waste contains gas, it is necessary to separate the gas and liquid prior to measurement. FIG. 2 is a schematic diagram of a vacuum car equipped with such a gas-liquid separation device. In the figure, 1 is a vacuum tank, 2
This is a gas-liquid separation device for separating gas from human waste containing gas, and is composed of a gas-liquid separation tank 2a and pipes 2b and 2c provided above and below. The liquid flows through the lower pipe 2c, and the gas bypasses the upper pipe 2b. A flow meter 3 is attached to the pipe 2c, and the flow rate of human waste is measured by this.

4 is a hose reel for winding up the hose 5, 6 is a suction port, 7 is a suction port, 8 is a suction port valve, and 9 is an exhaust port.

As a gas-liquid separator, for example, there is one proposed by the present applicant in Utility Model Application No. 59-28873. Third
The figure is a sectional view showing such a gas-liquid separation device. The gas-liquid separation tank 2a is arranged inclined at a predetermined angle with respect to the vertical direction. Human waste A is introduced into the gas-liquid separation tank from the middle through a pipe 10.
A piping 2c is connected to the lower part of the gas-liquid separation tank 2a, and a piping 2b is connected to the upper part. A flow meter 3 is provided on the pipe 2c, and is joined to the pipe 2b at a portion beyond it, leading to the suction port 7. Gas-liquid separation tank 2a
A spherical float 2d is placed on the liquid surface of the human waste A inside.

According to such a configuration, even if the port to the pipe 2c is blocked by contaminants contained in human waste, the float 2
d closes the port to the pipe 2b as the liquid level rises, and the internal pressure increases, making it possible to remove the blockage. Moreover, when the inside of the gas-liquid separation tank 2a becomes full of gas, the float 2d closes the port to the pipe 2c,
Prevents gas from flowing in the direction of the pipe 2c. Furthermore, if there is fluctuation in the liquid level in the gas-liquid separation tank 2a, the float 2
This can be prevented by the inertia of d, and there is an advantage that the opening to the pipe 2c will not be opened to gas.

However, in such a configuration, as shown in the partially enlarged view of FIG. 4, the float 2d has a shape that completely blocks the opening to the pipe 2b, so the internal pressure increases and the opening to the pipe 2c increases. Even if the clog is removed and the liquid level is lowered, the surface tension of the liquid B existing between the float 2d and the port or the suction force of the vacuum pump to evacuate the interior of the vacuum tank 1 Therefore, the float 2d does not fall immediately and the gas-liquid separation tank 2a
It will no longer follow the liquid level inside. As a result, gas may flow in the direction of the pipe 2c, causing an error in flow rate measurement.

Of course, it is possible to make the gas-liquid separation tank 2a larger so that gas does not flow into the pipe 2c even if the float 2d does not fall immediately, but this would make the entire gas-liquid separation device 2 large and impractical. .

<Problem to be solved by the invention> The technical problem to be solved by the invention is that in the above-mentioned gas-liquid separation device, the float easily detaches from the mouth of the upper pipe, and the problem is caused by the change in the liquid level. The goal is to be able to follow up immediately.

<Means for solving the problem> The configuration of the present invention is such that a gas-liquid separation tank is arranged inclined at a predetermined angle with respect to the vertical direction, and a pipe for bypassing gas is connected to the upper part of this gas-liquid separation tank. is,
At the bottom of this gas-liquid separation tank, a pipe for flowing liquid with a flow meter installed in the middle of the pipe is connected, and in the middle of this gas-liquid separation tank, a pipe for introducing a liquid containing gas is connected, In this gas-liquid separation device in which a float is placed on the liquid surface of a liquid containing gas led into the gas-liquid separation tank, the mouth of the lower piping of the gas-liquid separation tank is damaged by contaminants contained in the liquid. When the liquid level rises due to blockage and the float comes into contact with the upper inner surface of the gas-liquid separation tank, the float partially contacts the mouth of the upper pipe of the gas-liquid separation tank, and these The reason lies in the fact that there is a gap in between.

<Operation> The above technical means operates as follows. That is,
Because the center line of the float and the center line of the mouth of the upper pipe are misaligned, or the mouth has a non-circular shape, or the shape of the float is non-spherical, Even if the liquid level rises and the mouth of the upper pipe and the float come into contact, a gap remains between them;
The above-mentioned float adsorption phenomenon does not occur.

<Examples> Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the main parts of the apparatus according to the present invention. In the case of this figure, the mounting position of the mouth of the upper pipe was selected so that the mouth of the upper pipe would not be completely blocked by the float. In the figure, the same elements as those in FIG. 3 are given the same reference numerals.
In both figures a and b, the shape of the float 2d is spherical, and the shapes of the ports 2e and 2e' to the upper pipe 2b are circular. The difference between Figures a and b is that in Figure a, the upper pipe 2b is attached to the side of the gas-liquid separation tank 2a, whereas in Figure b, the upper pipe 2b is attached to the gas-liquid separation tank. It is attached to the end face of 2a. There is no other real difference between the two. As is clear from these figures, when the liquid level rises and the float 2d comes into contact with the upper inner surface of the gas-liquid separation tank 2a, the contact between them is point contact, and as shown by the dashed line, The center line of the float 2d and the center line of the upper pipe 2b are different from each other, and the opening 2 of the upper pipe
A gap is created between e, 2e' and the float 2d. As a result, no adsorption phenomenon occurs between them, and after removing the clog, the float 2d can be easily removed from the ports 2e, 2e' of the upper pipe, and can directly follow changes in the liquid level.

It should be noted that the gap is minute, and it has been confirmed through experiments that this gap hardly interferes with the clog removal effect.

FIG. 5 is a sectional view showing the main parts of another embodiment of the device of the present invention. In the case of this figure, there are protrusions 2f, 2 on the inner surface of the upper part of the gas-liquid separation tank 2a that the float 2d contacts.
f' is attached by screwing or press-fitting, so that the ports 2e, 2e' of the upper piping are not completely blocked by the float 2d. In the case of figure a, protrusion 2
f is attached to the end surface of the gas-liquid separation tank 2a, and the upper pipe 2b is attached to the side surface of the gas-liquid separation tank 2a. In the case of figure b, the protrusion 2f' is the gas-liquid separation tank 2a.
The upper pipe 2b is attached to the end face of the gas-liquid separation tank 2a. There is no other real difference between the two.

Even with this configuration, as shown by the dashed line, the center line of the float 2d and the center line of the upper pipe 2b are offset, and the ports 2e, 2e' of the upper pipe and the float 2
A gap is created between the two parts and the adsorption phenomenon does not occur between them.

In the embodiment described above, the positional relationship between the upper piping ports 2e, 2e' and the float 2d is selected to create a gap between them, but the present invention is not limited to this. 2e′ shape or float 2
A similar effect can be obtained by selecting the shape of d. That is, the openings 2e and 2e' of the upper pipes are normally circular in shape, but they may also be non-circular such as an ellipse, a triangle, or a square. In this way, the contact part with the normally spherical float 2d will not be in line contact,
There will be a gap between them.

Furthermore, although the shape of the float 2d is usually spherical,
The lower half of this float remains spherical (hemispherical) so as to reliably close the mouth of the lower pipe 2c, and the upper half that contacts the upper pipe 2b is elliptical or has a recessed part on the spherical surface; Alternatively, it may have a non-spherical shape with protrusions provided on the spherical surface. Even if you do this,
A gap is created between the upper piping ports 2e, 2e' and the float 2d. In this case, it is necessary to take measures such as placing a weight inside the float 2d so that the lower half of the spherical shape always faces downward.

<Effects of the invention> According to the invention, after the float 2d closes the port to the pipe 2b and removes the blockage in the pipe 2c, the float 2d easily separates from the ports 2e and 2e' of the upper opening. Since changes in the liquid level are directly followed, gas does not flow in the direction of the pipe 2c, and accurate flow rate measurement can be performed without using a large gas-liquid separation tank 2a.

[Brief explanation of drawings]

Figures 1a and b are cross-sectional views showing the main parts of the device according to the present invention, Figure 2 is a schematic diagram showing a conventional example of a vacuum car equipped with a gas-liquid separation device, and Figure 3 is a conventional gas-liquid separation device. A sectional view showing the device; FIG. 4 is a partially enlarged view for explaining the drawbacks of the gas-liquid separation device shown in FIG. 3;
FIGS. 5a and 5b are sectional views showing essential parts of another embodiment of the device of the present invention. 2... Gas-liquid separation device, 2a... Gas-liquid separation tank, 2
b... Upper piping, 2c... Lower piping, 2d... Float, 2e, 2e'... Upper piping mouth.

Claims (1)

[Scope of utility model registration request] A gas-liquid separation tank is arranged inclined at a predetermined angle with respect to the vertical direction, and piping for bypassing gas is connected to the upper part of this gas-liquid separation tank, and a flow rate is connected to the lower part of this gas-liquid separation tank in the middle of the pipe. A pipe for flowing the liquid equipped with a meter is connected, and a pipe for introducing the liquid containing gas is connected in the middle of this gas-liquid separation tank, and the liquid containing gas introduced into the gas-liquid separation tank is In a gas-liquid separation device in which a float is arranged on a liquid level, the mouth of the lower piping of the gas-liquid separation tank is blocked by contaminants contained in the liquid, the liquid level rises, and the float When it comes into contact with the upper inner surface of the gas-liquid separation tank,
A gas-liquid separation device characterized in that the float partially contacts the mouth of the upper pipe of the gas-liquid separation tank, and a gap is formed between them.