JPH05278787A - Whirl generation preventive device for liquid in storage tank - Google Patents

Abstract

PURPOSE:To suppress the generation of whirl, and prevent air from mixing in a liquid by installing a whirl generation preventive device which has a plurality of guide blades and a shielding board at the opening of a storage tank. CONSTITUTION:A plurality of guide blades 10 are radially arranged in a storage tank A for which an opening is provided at the approximately central part of a bottom wall 1, and a whirl generation preventive device B with a shielding board 7 is installed above the center of the guide blades 10. When the level of a liquid in the storage tank gradually descends, whirl becomes easy to generate around the opening, but the liquid flows toward the opening on the bottom of the storage tank while being guided by the guide blades 10, and whirl does not generate even when the liquid surface descends. Also, the top of the opening is covered by the shielding board 7, and therefore, air is also prevented from mixing in.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid in a storage tank for preventing air from being mixed by generating a vortex when the liquid contained in the storage tank is supplied through a supply pipe. The present invention relates to a device for preventing eddy generation.

[0002]

2. Description of the Related Art For example, as shown in the longitudinal sectional view of FIG. 8, a storage tank A for storing flavors added to shredded tobacco or tobacco leaves has a conical surface in which the shape of a bottom wall 1 is lowered toward the center. An opening 2 formed in the bottom wall 1 and formed substantially in the center of the bottom wall 1.
The upper end of the supply pipe 3 is connected to. The bottom wall 1 is formed in a conical surface which becomes lower toward the center, and when the liquid level of the liquid replenished in the storage tank A is lowered, the fragrance is collected around the opening 2 and used without waste. This is to prevent the air on the liquid surface from flowing into the opening 2. A side wall 4 is provided around the periphery of the bottom wall 1, and a replenishment pipe 5 for replenishing the storage tank A with the perfume from the outside is provided inside the side wall 4.

Perfume is replenished into the storage tank A from the outside via the replenishment pipe 5 to adjust the liquid level to H.S. It is raised to L, and then the pump is operated to suck in the fragrance in the storage tank A, and is sprayed from the nozzle at the tip via the supply pipe 3 to be added to chopped tobacco or tobacco leaves to obtain a harmonious aroma. To do. The liquid level of the fragrance is L. When the perfume is lowered to around L, a vortex is generated in the fragrance around the opening 2 and the liquid level around the vortex is lowered, so that a phenomenon occurs in which air is supplied together with the fragrance.

[0004]

When air is mixed in the fragrance, the pressure of the supply pump is lowered to make it impossible to supply the fragrance, and the amount of the fragrance added to the tobacco becomes uneven, and the product is produced. Since there arises a problem that greatly affects the taste quality of cigarettes, it is necessary to prevent the inclusion of air as much as possible. In order to prevent air from being mixed, if the amount of the fragrance in the storage tank A is increased to raise the liquid level of the fragrance, the residual fragrance used until now is changed when changing to a different kind of fragrance by changing the production lot of cigarettes. There is a problem that waste that must be discarded and waste that the remaining amount of time is discarded become long, and the cost of the fragrance addition work becomes high.

Further, there is a problem that residual fragrance cannot be discharged to the sewer pipe according to the water quality regulation. The present invention is intended to solve such a problem, and prevents the generation of vortices that occur when the remaining amount of liquid in the storage tank A decreases, and prevents air from being mixed in the supplied liquid. A vortex generation preventing device that prevents

[0006]

To achieve the above object, the present invention provides an inner bottom wall of a storage tank for supplying the liquid to the outside from a storage tank containing the liquid therein. A swirl generation preventing device arranged in the discharge opening, wherein a plurality of guide blades are arranged radially from a peripheral portion of the opening and guide liquid toward the opening, and a vicinity of the opening in the storage tank. A shielding plate disposed above is provided to form a device for preventing the liquid in the storage tank from being swirled. Alternatively, a tubular body having a peripheral wall that can be inserted into the opening, a shield plate that closes the upper end of the tubular body, and a discharge hole that is formed in the peripheral wall, and a cap of the tubular body A plurality of guide vanes, one end of which is fixed to the peripheral wall, are radially arranged from the peripheral wall, and are mounted on the bottom wall, are provided to form a device for preventing the swirling of the liquid in the storage tank.

[0007]

When the swirl prevention device configured as described above is placed on the bottom wall in the storage tank, the shield plate is located above the opening, and the guide vanes placed on the inner bottom wall surface of the storage tank are , Acts as a supporting leg that holds the position of the shielding plate.

When the liquid in the storage tank is started to be supplied to the outside,
Since the liquid in the storage tank flows toward the opening and is supplied to the outside via the opening, the level of the liquid gradually decreases, especially the liquid surface around the opening becomes low and vortices easily occur, and the opening The air above is easily mixed with the liquid flowing into the opening. However, since the upper part of the opening is covered with the shielding plate, the inclusion of air is prevented. Since the liquid flows toward the opening of the storage tank while being guided by the guide vanes, the generation of vortices can be prevented even when the liquid surface is lowered.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a vortex generation preventing apparatus B installed in a conventional storage tank A, and FIG. FIG. 3 is a plan view of the vortex generation preventing apparatus B, and FIG. 4 is a perspective view of the vortex generation prevention apparatus B with the upper and lower sides turned upside down. As shown in FIG. 2, the swirl prevention device B includes a tubular body 6 having a cylindrical peripheral wall, and a shield plate 7 for closing the upper end of the tubular body 6.
And a cap 9 in which a plurality of discharge holes are formed in the peripheral wall of the tubular body 6. The outer diameter dimension of the tubular body 6 is a dimension that can be inserted into the opening 2 of the storage tank A.

At the intermediate portion of the tubular body 6 in the longitudinal direction, one end of a plurality of (three in this embodiment) guide blades 10 arranged radially toward the center of the tubular body 6 is discharged. It is fixed at approximately the same height as the hole 8. The guide blade 10 is formed in an elongated flat plate shape, and is fixed to the cap 9 in a radial direction from the outer peripheral surface of the cap 9 with the width of the flat plate oriented in the vertical direction and with an inclination parallel to the bottom wall 1 of the storage tank A. (Fig. 2
reference).

The reason why the width of the flat plate of the guide vane 10 is oriented in the vertical direction is to make it easier to guide the liquid in the storage tank A to the discharge hole 8 and to make the slope parallel to the bottom wall 1 of the storage tank A. The reason is that the guide blade 10 placed on the bottom wall 1 also serves as a holding leg for holding the cap 9 inserted into the opening 2. In order to prevent the deformation of the guide vanes 10, both ends of the reinforcing rod 11 are fixed to the adjacent guide vanes 10 by means such as welding.

Next, the operation of the device B for preventing the swirling of the liquid in the storage tank constructed as described above will be described. When the swirl prevention device B is put in the storage tank A and the guide blade 10 is placed on the bottom wall 1 of the storage tank A with the cap 9 aligned with the position of the opening 2, the lower half portion of the cap 9 is inserted into the opening 2. As a result, the discharge hole 8 of the cap 9 has substantially the same height as the inner surface of the bottom wall 1.
Since the guide vanes 10 mounted on the bottom wall 1 of the storage tank A have the same inclination as the conical surface of the bottom wall 1, the cap 9 is attached to the bottom wall 1.
It serves as a supporting leg that holds the position of the opening 2 of the.

The storage tank A is provided with H. When the vortex generation preventing device B is not used, when the vortex generation preventing device B is not used, the perfume is sucked by the pump and then sprayed from the nozzle at the tip via the supply pipe 3. Although air was trapped around the level of L, when the vortex generation preventing device B is used, the upper surface of the cap 9 is closed by the shielding plate 7, so that the air above the liquid surface directly There is no risk of entering the cap 9, and it is possible to significantly lower the conventional residual liquid level (in the actual example, the residual liquid amount is 1
/ 6). In addition, the fragrance flows into the discharge hole 8 of the cap 9 along the guide vanes 10 to prevent the generation of vortices and stabilizes the liquid surface as shown in FIG.

Therefore, even when the level of the flavor in the storage tank A is supplied almost to the cap 9, the amount of the flavor added to the tobacco is stable, and the flavor quality of the tobacco is improved.
Appearance quality is retained.

A perspective view of FIG. 5 shows a vortex generator B ₁ showing a second embodiment of the present invention, in which a tubular body 12 made of a net material is used in place of the tubular body 6. A shield plate 7 is provided on the cylindrical body 12.
And a plurality of guide blades 10 are provided on the outer peripheral surface of the tubular body 12.
Is fixed in the same manner as in the first embodiment described above, and the liquid flowing toward the tubular body 12 along the guide vanes 10 passes through the mesh formed on the front surface of the tubular body 12 and the supply pipe 3 Flow into.

A perspective view of FIG. 6 shows a swirl generator B ₂ showing a third embodiment of the present invention. Instead of the tubular body 6, a plurality of support legs I3 are provided upright on the lower surface of the shield plate 7. , Each support leg 13
The guide vane 10 was fixed to. Similar to the tubular body 6, the plurality of support legs 13 are provided with the shielding plate 7 at the upper part, and the lower half part is inserted into the opening 2. The space formed between the adjacent support legs 13, 13 serves as a large discharge hole 8.

The perspective view of FIG. 7 shows a spiral generator B _{3 according} to a fourth embodiment of the present invention, in which the tubular body 6 is omitted and the guide vanes 10 are directly fixed to the lower surface of the shield plate 7. In the vortex generator B ₃ , the liquid flowing below the shielding plate 7 along the guide vanes 10 flows into the opening 2.

[0018]

When the device for preventing vortex generation of the present invention is used, the shielding plate located above the opening in the storage tank can prevent the mixing of air generated due to the decrease in the liquid level. Further, when the liquid level is lowered, the generation of swirl can be prevented by the guide vanes arranged on the inner bottom wall of the storage tank. From these, the amount of liquid remaining in the storage tank due to the mixing of air can be reduced to 1/6 of that in the conventional case, and the discharge time of the residual liquid can be greatly shortened. When the liquid is a fragrance for tobacco manufacturing, the time required to switch fragrances of different types by changing the production lot can be significantly shortened, and air can be prevented from being mixed into the fragrance supplied from the storage tank. Therefore, there is no fear of unevenness in the amount of tobacco added. Further, since the fragrance for producing tobacco cannot be stored for a long period of time, the residual liquid in the storage tank needs to be discarded. However, the present invention reduces the amount of waste and has a great effect on cost reduction.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a vortex generation preventing apparatus B installed in a storage tank A.

2 is a front view of a swirl prevention device B. FIG.

FIG. 3 is a plan view of a swirl prevention device B.

FIG. 4 is a perspective view of the vortex generation preventing apparatus B in a state in which the top and bottom are turned upside down.

FIG. 5 is a swirl prevention device B showing a second embodiment of the present invention.
It is a perspective view of ₁ .

FIG. 6 is a swirl prevention device B showing a third embodiment of the present invention.
It is a perspective view of ₂ .

FIG. 7 is a vortex generation preventing apparatus B showing a fourth embodiment of the present invention.
₃ is a perspective view.

FIG. 8 is a vertical cross-sectional view of a storage tank A for explaining a spiral generated when the spiral generation preventing device B is not used.

[Explanation of symbols]

 A Storage tank B Vortex generation prevention device 1 Bottom wall 2 Opening 3 Supply pipe 6,12 Cylindrical body 7 Shielding plate 8 Discharge hole 9 Cap 10 Guide vane 11 Reinforcing rod 13 Support leg

Claims (2)

[Claims] 1. A swirl prevention device arranged in an outlet opening provided in an inner bottom wall of the storage tank for supplying the liquid to the outside from the storage tank containing the liquid therein. A plurality of guide blades are arranged radially from the peripheral portion of the opening to guide the liquid toward the opening, and a shield plate is provided above the vicinity of the opening in the storage tank. A device for preventing the swirling of liquid in the storage tank. 2. A swirl prevention device arranged in an outlet opening provided in an inner bottom wall of the storage tank for supplying the liquid to the outside from the storage tank containing the liquid therein. A tubular body having a peripheral wall that can be inserted into the opening, a shielding plate that closes the upper end of the tubular body, and a discharge hole that is formed in the peripheral wall; and a peripheral wall of the tubular body A swirl prevention device for liquid in a storage tank, comprising: a plurality of guide vanes, one end of which is fixed to the bottom wall of the reservoir, the guide vanes being radially arranged from the peripheral wall and mounted on the bottom wall.