JP4316251B2 - Closed stirring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hermetic stirrer that is optimal for preventing a liquid to be stirred and its vapor from leaking from a stirring tank and preventing foreign substances from entering from the outside.
[0002]
[Prior art]
As a conventional closed type stirring device of this type, a stirring blade immersed in a closed stirring tank is driven to rotate by the magnetic force of a magnet installed outside the stirring tank, and the drive shaft requiring a shaft seal is What is made not to insert through a stirring tank is known (for example, refer to patent documents 1).
[0003]
There is also a type in which a porous disk or a holeless disk is moved up and down in a stirring tank to perform stirring.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-353432
[Problems to be solved by the invention]
The method of rotationally driving the stirring blade by the magnetic force of the magnet has a problem that it is not suitable for a large-capacity stirring device because a high torque cannot be obtained because it is driven across the tank wall of the stirring tank.
[0006]
In addition, the above-described method of moving a perforated disk or a non-perforated disk up and down has a problem that stirring efficiency (mixing efficiency) is poor because only vertical convection is generated and swirl is less generated.
[0007]
The present invention eliminates these problems, can generate a swirling flow and upstream and downstream in the stirring liquid, and can completely seal the stirring tank, and can also be applied to a large-capacity stirring apparatus. An object of the present invention is to provide a type stirring device.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a vertically movable diaphragm on the upper surface portion of the stirring tank so as to cover the upper surface portion in an airtight manner, and a housing penetrating the diaphragm is fixed to the diaphragm and suspended. Further, a stirring blade is fixed and suspended at the lower end of the housing, and the stirring blade is moved up and down to stir the inside of the stirring tank, and a baffle plate is formed on the inner surface of the stirring tank. The agitating blades are provided in a vertically long shape, and a plurality of flat plate blades that cause a discharge flow radially and outwardly on the upper and lower surfaces of the disk are provided in an obliquely radial manner .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the hermetic stirring device of the present invention will be described with reference to FIGS.
[0010]
FIG.1 and FIG.2 shows the longitudinal cross-sectional view of the stirring apparatus 1 of this Embodiment, and 2 is a stirring tank.
[0011]
Reference numeral 2a denotes a baffle plate, and four baffle plates 2a are provided vertically along the inner wall of the agitation tank 2 at a position on the tank liquid level WL.
[0012]
Reference numeral 3 denotes a diaphragm. The diaphragm 3 is made of a film-like body made of a stretchable material such as rubber.
[0013]
1 shows a state when the diaphragm 3 is moved up, and FIG. 2 shows a state when the diaphragm 3 is moved down.
[0014]
Reference numeral 4 denotes a casing, and the casing 4 is vertically suspended by a vertical movement device (not shown), and an intermediate portion of the casing 4 penetrates the central portion 3a of the diaphragm 3 and the central portion. In 3a, both are airtightly fixed.
[0015]
Further, a stirring blade 5 is fixedly attached to the lower end portion of the housing 4.
[0016]
Details of the stirring blade 5 are shown in FIGS. 4 is a view of the stirring blade 5 as viewed in the direction of arrow A in FIG.
[0017]
That is, the stirring blade 5 has a structure in which a plurality of flat plate blades 5b are arranged in a slanted radial pattern on the upper and lower surfaces of the disk 5a. And the center part of the upper surface of this disk 5a is fixed to the lower end part of the said housing | casing 4, and it is suspended in the stirring tank 2. As shown in FIG.
[0018]
Next, the operation and effects of the stirring device 1 of the present embodiment will be described.
[0019]
The stirring liquid is put into the stirring tank 2, and the stirring tank 2 is sealed with a diaphragm 3 or the like, and then the casing 4 and its lower end are moved by a vertical movement device (not shown) installed above the casing 4. The stirring blade 5 provided in the section is reciprocated up and down.
[0020]
When the stirring blade 5 moves up, the stirring liquid on the upper surface side of the stirring blade 5 becomes the positive pressure side, and when the stirring blade 5 moves down, the lower surface side of the stirring blade 5 becomes the positive pressure side. Since the flat blades 5b are erected radially on the upper and lower surfaces, the agitating liquid on the positive pressure side passes between the flat blades 5b and is sent out obliquely radially outward. A discharge flow.
[0021]
This discharge flow becomes an upward flow and rises along the wall surface by the baffle plate 2 a installed along the inner wall of the agitation tank 2, thereby generating vertical convection in the agitation tank 2.
[0022]
Thus, the agitating liquid is agitated with a swirling component and up and down convection by the up and down movement of the agitating blade 5.
[0023]
Since this vertical movement is directly driven by a power source, it can give a much stronger driving force compared to the driving by the magnetic force of the magnet, and can be applied to a large-capacity hermetic agitator. Have
[0024]
In addition, such a vertical motion type stirring device is said to have a weaker shearing action on the stirring liquid than a general rotary blade type stirring apparatus, and is particularly effective when it is not desired to destroy the contents of the stirring liquid. is there.
[0025]
That is, the strength of the swirl component of the stirring liquid can be adjusted by changing the inclination angle of the flat plate blade 5b erected on the stirring blade 5, and the strength of the shearing force can be adjusted.
[0026]
A second embodiment of the hermetic stirring device of the present invention will be described with reference to FIGS.
[0027]
5 and 6 both show a longitudinal sectional view of the stirring device 6 according to the present embodiment, and this embodiment has a bellows portion 7a in the central portion instead of the diaphragm 3 in the first embodiment. The point which used the cover body 7 differs from the said 1st Embodiment.
[0028]
The lid body 7 is airtightly provided so as to cover the upper surface portion of the stirring tank 2, and an expandable / contractible bellows portion 7 a is airtightly connected to the center portion of the upper surface of the lid body 7.
[0029]
The bellows portion 7a is made of a thin metal plate, and the housing 4 penetrating through the central portion of the bellows portion 7a is vertically suspended by a vertical movement device (not shown), and a stirring blade is provided at the lower end portion thereof. 5 is fixed and suspended in the stirring tank 2.
[0030]
Further, the portion of the housing 4 that penetrates the bellows portion 7a is airtightly fixed.
[0031]
5 shows a state in which the bellows portion 7a is contracted, and FIG. 6 shows a state in which the bellows portion 7a is extended.
[0032]
The operation of the present embodiment is the same as that in the first embodiment. However, in this embodiment, since the bellows portion 7a made of a metal material is used instead of the diaphragm 3 made of a stretchable membrane such as rubber in the first embodiment, the stirring liquid becomes high temperature. In this case, it has an effect that can be used for a stirring liquid that is erosive to rubber or the like.
[0033]
A third embodiment of the hermetic stirring device of the present invention will be described with reference to FIG.
[0034]
In the present embodiment, the stirring tank 8 provided with a plurality of baffle plates 8a at the bottom of the stirring tank 2 in the first embodiment or the second embodiment is used.
[0035]
The agitation tank 8 is the same as the agitation tank 2 except that a plurality of, for example, four plate-like baffle plates 8a are arranged radially at the bottom of the tank.
[0036]
By using this baffle plate 8a, the effect of improving the stirring efficiency as compared with the prior art was obtained under the combination conditions with the stirring blade described later.
[0037]
In the first to third embodiments, the stirring blade 5 has a structure in which a plurality of flat plate blades 5b are arranged in a slanting radial manner on the upper and lower surfaces of the disk 5a. However, as shown in FIGS. 8 and 9, flat plate blades 10b each having a blade height higher than the flat plate blades 5b are respectively arranged on the upper and lower surfaces of the disk 5a in an inclined radial manner, and these flat plates are further suspended. It is good also as the stirring blade 10 of the structure where the cylindrical bodies 10c and 10c surrounding the outer peripheral part of the blade | wing 10b were each enclosed from the upper and lower surfaces of the said disk 5a with a small clearance.
[0038]
FIG. 9 is a view of the stirring blade 10 as viewed in the direction of arrow B in FIG.
[0039]
Alternatively, as shown in FIGS. 10 and 11, instead of the stirring blade 5, a plurality of arc blades 11 b are respectively arranged spirally from the center of the disk 5 a on the upper and lower surfaces of the disk 5 a. The stirring blade 11 may be used.
[0040]
FIG. 11 is a view of the stirring blade 11 as viewed in the direction of arrow C in FIG.
[0041]
Alternatively, as shown in FIGS. 12 and 13, instead of the stirring blade 5, a plurality of arc blades 12b are respectively arranged in a spiral shape from the center of the disk 5a on the upper and lower surfaces of the disk 5a. Further, the arc blade 12b may be a stirring blade 12 formed so that the blade height gradually decreases from the central portion to the outer peripheral portion.
[0042]
Alternatively, a bent wing may be used instead of the arc wing. Here, the bent wing is obtained by approximating an arc with a plurality of straight lines.
[0043]
FIG. 13 is a view of the stirring blade 12 as viewed from the direction of arrow D in FIG.
[0044]
Each of these stirring blades 5, 10, 11, and 12 can be provided as a stirring device with good stirring efficiency in combination with the stirring tank 2 or 8 according to the properties of the liquid to be stirred. Moreover, in the above-described embodiment, the casing 4 is disposed at the center of the agitation tank 2, but may be disposed at a position away from the center.
[0045]
【The invention's effect】
Thus, according to the present invention, it is possible to generate a swirling direction flow and up and down convection in the stirring liquid, and to obtain a larger driving force than a conventional stirring apparatus driven by the magnetic force of a magnet. Since there is no shaft seal portion in which the steam may leak, there is an effect that it is possible to provide a hermetic stirrer applicable to a large-capacity stirrer.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a first embodiment of a hermetic stirring device according to the present invention.
FIG. 2 is a longitudinal sectional view of another state of the first embodiment.
FIG. 3 is a side view of the stirring blade of the first embodiment.
4 is a view as seen from an arrow A in FIG. 3;
FIG. 5 is a longitudinal sectional view of a second embodiment of the hermetic stirring device of the present invention.
FIG. 6 is a longitudinal sectional view showing another state of the second embodiment;
FIG. 7 is a longitudinal sectional view of a part of a third embodiment of the hermetic stirring device of the present invention.
FIG. 8 is a side view of another stirring blade of the hermetic stirring device of the present invention.
9 is a view on arrow B in FIG. 8. FIG.
FIG. 10 is a side view of still another stirring blade of the hermetic stirring device of the present invention.
11 is a view taken in the direction of arrow C in FIG.
FIG. 12 is a side view of still another stirring blade of the hermetic stirring device of the present invention.
13 is a view on arrow D in FIG.
[Explanation of symbols]
1, 6 Stirring device 2, 8 Stirring tank 2a, 8a Baffle plate 3 Diaphragm 4 Housing 5, 10, 11, 12 Stirring blade 5b, 10b Flat plate blade 7 Lid 7a Bellows part 10c Cylindrical body 11b, 12b Arc blade

Claims (3)

A vertically movable diaphragm is provided on the upper surface of the agitation tank so that the upper surface of the agitation tank is airtightly covered, and a casing penetrating the diaphragm is fixed to the diaphragm and suspended, and further stirred at the lower end of the casing. wings and vertical set by fixing the, the stirring blade is moved up and down the provided vertically elongated baffle plate on the inner surface of the agitation tank so as to form so as to stir the stirring tank, the stirring blades, disc A hermetic stirrer in which a plurality of flat plate blades for generating a discharge flow radially outward on the upper and lower surfaces of the upper and lower surfaces are provided in an oblique radial manner . A lid having a bellows portion that can be moved up and down is provided on the upper surface of the stirring tank so as to airtightly cover the upper surface, and a casing penetrating the bellows is fixed to the bellows and suspended. A stirring blade is fixed and suspended at the lower end of the housing, and the stirring blade is moved up and down to stir the inside of the stirring tank, and a baffle plate is provided vertically on the inner surface of the stirring tank , The agitating blade is a hermetic stirring device in which a plurality of flat plate blades for generating a discharge flow radially outward on the upper and lower surfaces of a circular plate are erected radially . The stirrer blades are provided with a plurality of flat plate blades arranged obliquely and radially on both upper and lower surfaces of the disk, and cylindrical bodies surrounding the outer periphery of the flat plate blades are respectively formed from the upper and lower surfaces of the disk. The hermetic stirrer according to claim 1 or 2, wherein the hermetic stirrer has a structure surrounded by a small gap .

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