JPH0213351Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a liquid discharge container that is applied to a tank or funnel for collecting liquid.

(Prior Art) In a liquid recovery tank or funnel that is equipped with a discharge pipe extending vertically from the bottom, the amount of fluid flowing into the tank or funnel when the liquid is discharged is relatively small, and the amount of fluid that flows from the opening of the discharge pipe is small. If the drain pipe is not always filled with water, the trapped gas phase will periodically occur in the drain pipe, resulting in fluctuations in the liquid level in the tank, flow fluctuations in the piping system connected to the discharge pipe, and even fluctuations in the discharge pipe. Various unstable phenomena such as vibration phenomena may occur.

Figure 1 shows an example of this type of tank.
A discharge pipe 2 which is open at the bottom of the tank 1 is connected to the tank 1. The liquid maintains a free liquid level 5 slightly higher than the bottom of the tank 1, and the air column 3 formed from there to the inside of the discharge pipe 2 causes the liquid to flow from the opening 4 of the discharge pipe 2 to the liquid level 6 inside the discharge pipe 2. During the
Flows while retaining a membrane-like flow.

(Problem to be solved by the invention) In Fig. 1, an air column 3 formed from the free liquid level 5 near the bottom of the tank 1 to the inside of the discharge pipe 2 is released at the opening 4 of the discharge pipe 2, and the liquid is being discharged in a stable state, but if the amount of liquid flowing into the tank 1 increases or the free liquid level 5 in the tank 1 becomes undulating, the opening 4 will become blocked and air will flow into the discharge pipe 2. The phase is sealed, the amount of liquid flowing out from the tank 1 decreases, the gas phase is compressed as the liquid level in the tank 1 rises, the liquid level 6 in the discharge pipe 2 also decreases, and the air column 3 grows. The state shown in FIG. 2 is reached.

After that, when the pressure of the trapped air column 3 increases, the air column 3 breaks the liquid film blocking the opening 4 and escapes to the tank 1 side, and conversely, the liquid that has been staying and accumulating in the tank 1 suddenly flows into the discharge pipe 2.
At this time, the fluid entrains a large amount of bubbles into the discharge pipe 2.
As the liquid flows into the liquid, the air bubbles combine in the discharge pipe 2 and grow again as an air column 3, which impairs liquid discharge.
The state shown in FIG. 2 is again achieved.

This repetition causes various unstable phenomena in the tank and piping system, such as liquid level fluctuations in the tank and flow fluctuations in the piping system.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a liquid discharge container that can eliminate unstable liquid flow in a tank or funnel.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above object, the present invention forms a free liquid level in a container to accommodate the liquid, and also connects a discharge pipe opening at the bottom of the container along the axial direction of the container. The present invention is characterized in that the liquid discharge container is provided with a liquid level adjustment part that is connected to the opening of the discharge pipe and maintains a predetermined distance from the bottom of the container to form a free liquid level.

(Function) The liquid level adjusting portion extending from the opening of the discharge pipe opens at a certain predetermined position. When the level of the liquid introduced into the container rises and reaches its opening,
The liquid flows out from the opening along the wall surface inside the liquid level adjustment part, and a film-like flow is formed there. This flow further reaches the discharge pipe from the liquid level adjustment section, and flows to the liquid level in the discharge pipe while maintaining the same flow state.

When this film-like flow is maintained, the state of the air column is stable, and there is no concern that the air column will be trapped in the liquid.

For example, when an air column becomes trapped in a liquid inside a discharge pipe, the liquid level fluctuates so much that the entire opening of the discharge pipe is blocked by the liquid. A liquid level adjustment section that is not easily affected can be said to be the most effective configuration.

In addition, if the container is designed so that the liquid flows into the container from above, the liquid is poured directly into the liquid level adjustment part, so a liquid film is formed on the inlet side of the liquid level adjustment part, and the air column is lowered by the liquid level. It gets trapped inside the adjustment section. In order to eliminate the blockage caused by the liquid film, it is more desirable to provide a protective member on the inlet side of the liquid level adjusting part in the above-described design.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 3, a bell mouth pipe 7 is connected to a discharge pipe 2 opening at the bottom of the tank 1, and a liquid level adjusting section having an opening 8 at a position slightly higher than the bottom is formed. This opening 8 is formed in a bell mouth shape and has a structure that allows the discharged liquid to easily flow.

In the above configuration, the liquid flowing into the tank 1 gradually rises to the opening 8 of the bell mouth tube 7 and forms a free liquid level 5. Furthermore, when the liquid level rises, the liquid flows out from the opening 8 into the bell mouth tube 7, flows in a film form along the wall surface, and also flows in the discharge tube 2 in the same way until it reaches the liquid level 6. flows.

Thus, while a film-like flow is maintained from the opening 8 of the bellmouth tube 7 to the liquid level 6 in the discharge tube 2, the air column 3 is kept in a stable state, and the air column 3 is confined within the liquid. It never happens. Therefore, tank 1
The occurrence of unstable phenomena such as liquid level fluctuations in the piping system and flow fluctuations in the piping system is suppressed.

In addition, if there is a concern that the liquid flowing into the tank 1 may prevent the formation of a stable air column 3,
The following embodiments are effective.

That is, what is shown in FIGS. 4 and 5 uses a protective member to cover the opening 8 of the bellmouth tube 7.

A ceiling plate 10 supported by a plurality of rectifying plates 9 is provided directly above the opening 8 so as to cover the entire area of the opening 8. Here, the rectifier plate 9 also serves as a support member for the ceiling plate 10, and rises from the bottom surface of the tank 1 and extends to the lower surface of the ceiling plate 10.

When the liquid flowing into the tank 1 falls in the direction of the opening 8 of the bell mouth pipe 7, it is received by the upper surface of the ceiling plate 10 arranged like an umbrella and is prevented from directly flowing into the opening 8. Furthermore, the rectifying plate 9 prevents the free liquid level 5 from undulating and creating an uneven liquid level state. This prevents the air column 3 from being blocked by the inflowing liquid, and also keeps the free liquid level 5 constant so that the film-like flow is maintained stably.

[Effect of idea]

As explained above, the present invention is equipped with a liquid level adjustment section that forms a free liquid level by maintaining a predetermined distance from the bottom of the container in line with the discharge pipe that opens at the bottom of the container. A stable air column is formed over time, making it possible to prevent instability in liquid flow in equipment that uses tanks or funnels, for example, and has the excellent effect of improving the safety of the equipment.

[Brief explanation of the drawing]

1 and 2 are sectional views showing a conventional tank, FIG. 3 is a sectional view showing an embodiment of a liquid discharge container according to the present invention, and FIGS. 4 and 5 are sectional views showing other embodiments of the present invention. FIG. 3 is a cross-sectional view and a plan view showing an example. 1...tank, 2...discharge pipe, 3...air column, 7
... Bell mouth tube, 8 ... Opening, 9 ... Rectifier plate, 10 ... Ceiling board.

Claims (1)

[Claims for Utility Model Registration] (1) A container for discharging liquid, which forms a free liquid level in a container to contain the liquid, and includes a discharge pipe opening at the bottom of the container along the axial direction of the container. A container for discharging a liquid, characterized in that the container is provided with a liquid level adjusting part that is connected to the opening of the discharge pipe and maintains a predetermined distance from the bottom of the container to form a free liquid level. (2) A liquid discharge container characterized by being provided with an umbrella-shaped air column protection member that covers the entire opening of the liquid level adjustment section.