JPH0710185A - Liquid storing tank - Google Patents

Abstract

PURPOSE:To provide a liquid storing tank which can prevent the formation of bubbles and the mixing of the bubbles in the stored liquid at the time of filling with liquid CONSTITUTION:The liquid storing tank is provided with a liquid storing tank body 1 and a liquid casting member 2 which is installed in the liquid storing tank body 1, has its upper part open and shaped like a trough and is constructed vertically into a nearly spiral form. The inclination angle of the liquid casting member 2 remains the same or becomes smaller toward the bottom part of the liquid storing tank body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid storage tank for storing a liquid in which bubbles tend to be generated when filling.

[0002]

2. Description of the Related Art A liquid such as an oil agent or a liquid resin raw material often collides with a bottom of a storage tank or a liquid surface of the storage tank to generate bubbles when the liquid is filled in a storage tank such as a tank. The generation of bubbles is not preferable for quality control of liquid. For this reason, conventionally, the tip of the liquid filling pipe used to fill the liquid in the storage tank is arranged near the bottom of the storage tank, or the tip side of the liquid filling pipe is bent into a bend shape. As a result, the liquid is made to fall along the inner wall surface of the storage tank to weaken the impact caused by the filling of the liquid into the storage tank and prevent the generation of bubbles. Further, as shown in FIG. 5, the liquid filling pipe 7c is connected to the fixed portion 71c and the movable portion 72c.
And the liquid outflow portion 73c.
It has also been attempted to prevent the generation of bubbles by arranging 3c near the liquid surface 6c by the buoyancy of the levitation body 74c and filling the liquid from near the liquid surface 6c.

[0003]

However, in the above and above, the liquid to be filled (hereinafter referred to as "filling liquid").
If bubbles already exist in the container (for example, bubbles were generated when the bubbles were extracted from a container such as a drum can), the bubbles were mixed in the liquid in the storage tank (hereinafter referred to as "storage liquid"). I will let you. Further, in the above case, the drop rate of the filling liquid changes due to the difference in height between the tip of the filling pipe and the liquid level of the contained liquid, which often causes bubbles. Further, in the above case, since the distance between the tip of the filling pipe and the inner wall surface of the container is constant, if the amount of the filling liquid is insufficient, the inner wall surface cannot be reached, and the amount of the filling liquid is If it is excessive, it will overflow, and eventually the filling liquid that does not propagate through these inner wall surfaces will drop as it is to the liquid surface of the contained liquid and generate bubbles.

Further, in the above case, since the levitation body 74c, the movable portion 72c and the liquid outflow portion 73c move in accordance with the height of the liquid surface 6c of the contained liquid B, the accommodating tank main body 1c.
Are required to have a size (body length, inner diameter, etc.) that allows them to move. Further, in the above items 1 to 4, when the temperature of the stored liquid is controlled, if the filling liquids having different temperatures are introduced, these do not mix well with the stored liquid in the storage tank, and as a result, they are more stable than the storage tank. It becomes difficult to take out the liquid at the specified temperature. The present invention has been made to solve the above problem, and an object of the present invention is to provide a liquid storage tank capable of preventing the generation of bubbles when filling a liquid and the mixing of bubbles into the storage liquid.

[0005]

In order to achieve the above object, a structural feature of the invention according to claim 1 is that a liquid storage tank main body and a liquid storage tank main body are arranged and the upper portion is opened. And a liquid charging member that is formed in a substantially spiral shape in the vertical direction. In order to achieve the above object, the structural feature of the invention according to claim 2 is that the inclination of the liquid charging member is
It is made to be the same or smaller toward the bottom of the liquid container main body.

[0006]

The liquid charging member (hereinafter referred to as "charging member") arranged in the liquid accommodating tank (hereinafter referred to as "containing tank") of the invention according to claim 1 having the above-described structure. ,
It has a gutter shape with an open upper part and is formed in a substantially spiral shape in the vertical direction. As a result, this input member,
The liquid has a predetermined inclination with respect to the liquid surface (horizontal surface) of the contained liquid. Therefore, since the filling liquid that is fed along the feeding member flows into the vicinity of the liquid surface of the containing liquid in a gentle state, the impact caused by the feeding of the filling liquid is small and bubbles are not generated. Further, even when bubbles are mixed in the filling liquid, the bubbles remain near the surface of the contained liquid and are not mixed inside the contained liquid. Further, even when a filling liquid having a temperature difference from that of the contained liquid is introduced, the filled liquid flows into the vicinity of the liquid surface of the contained liquid, so that it is gradually mixed with the contained liquid, and a liquid portion having a different temperature is formed inside the contained liquid. Never be done.

Further, in the storage tank of the invention according to claim 2 configured as described above, the inclination of the liquid charging member is the same or smaller toward the bottom of the liquid storage tank main body. . As a result, the liquid level of the contained liquid is low,
Even if there is a large difference in height from the position where the filling liquid is introduced (for example, the inlet provided in the storage tank), and the inflow velocity of the filling liquid to the storage liquid is usually high, keep the inflow speed small. Is possible. Therefore, it is possible to prevent the generation of bubbles and the like regardless of the height of the liquid level of the contained liquid.

[0008]

EXAMPLES The present invention will be described below with reference to examples. Example 1 As shown in FIG. 1, the liquid storage tank of the present embodiment includes a storage tank main body 1 and a charging member 2 arranged in the storage tank main body 1. The storage tank body 1 has a substantially cylindrical shape (inner diameter: 3500).
mm, height 5240 mm) and tubular body 11 having an outer shape
The upper lid 12 is covered with the above. A liquid injection pipe 3 including an injection port 31 and a tubular portion 32 is attached to the upper lid 12, and a valve 51 is provided below the container 11.
A liquid outflow pipe 5 that can be opened and closed is attached.

Further, the charging member 2 has a rectangular cross section (width: 200 mm, height: 150 m) with an open upper part.
g) having a m) is formed in a substantially spiral shape in the vertical direction. The inclination of the charging member 2 is 20 degrees with respect to the horizontal plane throughout. In addition, the insertion member 2 is fixed to the inner wall surface of the tubular body 11 at several points on the side wall surface thereof by the detention tool 4. The sectional shape of the charging member 2 is not limited to the rectangular shape.

On the other hand, in a state in which a liquid polyol (polypropylene glycol, viscosity: 700 centipoise) B in an amount occupying 3/5 of the total amount of the stored liquid is stored in the storage tank main body 1 configured as described above. Then, the filling liquid A made of the same polyol as the above-mentioned storage liquid B was introduced into the storage tank main body 1 through the injection port 31. The filling liquid A is injected from the tip of the tubular portion 32 onto the charging member 2 at a rate of 200 liters / minute, and reaches the storage liquid B along a substantially spiral path of the charging member 2. did.

At this time, as shown in FIG. 2, the charging member 2
Has a gradual inclination, so that the filling liquid A to be introduced flows into the vicinity of the liquid surface 6 of the contained liquid A in a gentle state. Therefore, the impact accompanying the charging of the filling liquid A can be suppressed to a small level, and the generation of bubbles can be prevented. Further, even if bubbles are present in the filling liquid A, the bubbles remain near the surface of the containing liquid B, and the containing liquid B
It does not mix inside. Furthermore, even when the filling liquid A having a temperature difference from the containing liquid B is introduced, the filling liquid A is gradually mixed with the containing liquid B, and a liquid portion having a different temperature is formed inside the containing liquid B. Absent. The cross-sectional shape, the cross-sectional area, the inclination of the charging member 2 and the like of the charging member 2 in this embodiment are determined in consideration of the properties (viscosity and the like) of the liquid to be filled, the filling amount, etc. It is preferable that the liquid B is always gently added.

Further, as a modification of this embodiment, as shown in FIG. 3, there can be mentioned a storage tank in which the charging member 2a is provided on the inner wall of the storage tank main body 1a. In this storage tank, as shown in the figure, the charging member 2a is provided on a part of the inner wall of the storage tank main body 1a, the attached bottom surface portion 21a on the inner wall, and the free end surface of the bottom surface portion 21a. It is configured by a space surrounded by the attached side wall portion 22aa. This modification has the advantages of the first embodiment and the advantages of more stable and simplified structure.

Embodiment 2 The storage tank of this embodiment is as shown in FIG. 4, and the inclination of the charging member 2b becomes smaller toward the bottom of the tubular body 11 (storage tank main body 1b). There is. It should be noted that this inclination is reduced at a constant rate from 20 degrees at the upper end of the charging member 2b to 10 degrees at the lower end. However, the rate of decrease of this inclination does not necessarily have to be constant, and the charging member 2
Only the inclination of the lower end of b may be reduced. In the storage tank of the present embodiment, since the liquid level 6 of the storage liquid B is low, the height difference from the introduction position of the filling liquid A (the liquid injection pipe 3b) is large.
Even when the inflow speed of the filling liquid A into the storage liquid B is high, the inflow speed can be suppressed to be low. Therefore, regardless of the height of the liquid surface 6 of the contained liquid B, it is possible to prevent the generation of bubbles and the like.

[0014]

As described above, when the storage tank of the present invention is used, the filling liquid flows in the vicinity of the liquid surface of the storage liquid in a gentle state, so that the impact caused by charging the filling liquid becomes small and bubbles are not generated. Do not generate. Further, even if bubbles are mixed in the filling liquid, the bubbles remain near the surface of the contained liquid and are not mixed inside the contained liquid. Further, when a filling liquid having a temperature difference from the contained liquid is introduced, the filled liquid flows near the liquid surface of the contained liquid, so that it gradually mixes with the contained liquid, and a liquid portion having a different temperature exists inside the contained liquid. It is not formed. Further, when the inclination of the liquid charging member is set to be the same or smaller toward the bottom of the liquid storage tank main body, it is possible to prevent generation of bubbles or the like regardless of the height of the liquid level of the stored liquid.

[Brief description of drawings]

FIG. 1 is a perspective view showing a liquid storage tank according to a first embodiment.

FIG. 2 is a vertical cross-sectional view showing a contact state between a liquid charging member of a liquid storage tank of Example 1 and a stored liquid.

FIG. 3 is a perspective view showing a liquid storage tank according to a modified example of the first embodiment.

FIG. 4 is a perspective view showing a liquid storage tank according to a second embodiment.

FIG. 5 is a perspective view showing a liquid storage tank according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1; Storage tank main body, 11; Cylindrical body, 12; Upper lid, 2; Liquid charging means, 21a; Bottom part, 22a; Side wall part, 3; Liquid injection pipe, 31; Injection port, 32; Tubular part, 4; Detention,
5: Liquid outflow pipe, 6; Liquid level, 7c; Liquid filling pipe, 7
1c; fixed part, 72c; movable part, 73c; liquid outflow part,
74c; float, A: filling liquid, B: containing liquid.

Claims (2)

[Claims] 1. A liquid storage tank main body, and a gutter-shaped liquid-discharging member that is disposed in the liquid storage tank main body and has an open upper portion and that is formed in a substantially spiral shape in the vertical direction. A liquid storage tank characterized by the above. 2. The liquid storage tank according to claim 1, wherein the inclination of the liquid charging member is the same or smaller toward the bottom of the liquid storage tank main body.