JP5933053B2 - Square stirring tank - Google Patents

Description

The present invention relates to a rectangular stirring tank, and particularly to a rectangular stirring tank that does not cause defective flow even in slurry or solid-liquid stirring.

As a conventional rectangular stirring tank, for example, as shown in FIGS. 14 and 15, a rectangular stirring tank a is provided with an inclined surface d extending from the lower part of both inner side surfaces b in the longitudinal direction to the bottom surface c, and the center of the stirring tank a A stirring tank provided with a stirring blade (not shown) at a position below the unit is known, and also comprises a square bottom plate e and a side plate f rising upward from the periphery of the bottom plate e as shown in FIG. The bottom plate e is provided with first projections g projecting upward so as to extend radially from the central portion toward the side plate f, and each side plate f further projects inwardly and extends in the axial direction. 2 protrusions h are provided, and the bottom plate e
Is provided with an axial flow blade j for sending the fluid in the stirring tank i toward the bottom plate e, and the fluid and the like sent out toward the bottom plate e by the rotation of the axial flow blade j The one projection g converts the flow in the radial direction toward the side plate f, and the side plate f also converts the circumferential flow into the axial upward flow by the second projection h and mixes them. A stirred tank i is known (see Patent Document 1).

JP 2003-154250 A

In these conventional square agitation tanks, according to the former agitation tank a, when the agitating blade is rotated to stir the liquid in the agitation tank a, the agitation tank a When a is long and has a plurality of stirring blades, there is a problem that a stagnant portion such as a solid or slurry is generated in the vicinity of the inner surface at the intermediate position of these stirring blades. The bottom plate e is provided with the first protrusion g and the side plate f is provided with the second protrusion h, which is structurally complicated, and in the case of a rectangular agitation tank, stagnant solid matter or slurry at the corner portion. There was a problem that part.

An object of the present invention is to solve these problems and to provide a rectangular stirring tank that has a simple structure and does not cause stagnant parts such as solid matter and slurry in the corners of the stirring tank.

In order to achieve this object, the present invention provides a rectangular stirring tank having front and rear inner surfaces, left and right inner surfaces, and a bottom surface, wherein the front and rear inner surfaces are formed as long long inner surfaces and the left and right inner surfaces are short. said bottom surface is formed in a rectangular form to the short inner surface, in the middle portion of the bottom surface is provided with ribs over between the long inner surface Rutotomoni, of each segment delimited by the projecting strip of the floor surface of the center portion A stirring blade is provided above .

According to the present invention, in a rectangular stirring tank, a stagnation part such as solid matter or slurry does not occur in a corner portion with a simple structure, and in a rectangular stirring tank, in the vicinity of the long inner side surface in the middle part of the bottom surface In addition, there is an effect that a stagnation part such as a solid substance or a slurry is not generated.

It is a top view of the stirring tank of Example 1 of this invention. FIG. 2 is a cross-sectional view taken along line II of FIG. 1. It is the perspective view which removed a part of corner part of this stirring tank. FIG. 6 is a plan view of a modified example of the first embodiment. FIG. 6 is a cross-sectional view taken along the line II-II in FIG. 5. It is a top view of the stirring tank of Example 2 of this invention. FIG. 7 is a cross-sectional view taken along the line III-III in FIG. 6. FIG. 7 is a cross-sectional view taken along the line IV-IV in FIG. 6. It is sectional drawing of a protrusion. It is sectional drawing of the modification 1 of a protrusion. It is sectional drawing of the modification 2 of a protrusion. It is sectional drawing of the modification 3 of a protrusion. It is a top view of the stirring tank of Example 3 of this invention. It is a top view of the stirring tank of a prior art example. FIG. 15 is a cross-sectional view taken along the line VV in FIG. 14. It is a top view of the stirring tank of another conventional example.

  The example of the form for carrying out the present invention is shown below.

  A first embodiment of the present invention will be described with reference to FIGS.

1 is a plan view of a stirring tank according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II of FIG. 1, and FIG. 3 is a perspective view in which a part of a corner portion of the stirring tank is removed. .

1 is a rectangular stirring tank, 1a and 1a are front and rear inner surfaces of the stirring tank 1, 1b and 1b are left and right inner surfaces of the stirring tank 1, and 1c is a bottom surface of the stirring tank 1, The front and rear inner surfaces 1a and 1a are formed as long inner surfaces that are long in the horizontal direction, the left and right inner surfaces 1b and 1b are formed as short inner surfaces that are short in the horizontal direction, and the bottom surface 1c is rectangular. Is formed.

As shown in FIG. 3, the first point A at a predetermined distance L1 from the bottom surface 1c at the corner line 1d at the four corners where the long inner side surface 1a and the short inner side surface 1b intersect, the long inner side surface 1a and the bottom surface 1c. The first horizontal angle line 1e where the crossing and the short inner side surface 1b intersect the second bottom surface 1c.
A corner inclined surface 2 that is inclined downward toward the inside of the agitation tank 1 by connecting the second point B and the third point C of the predetermined distance L2 from the corner line 1d at the corner line 1f is provided. It was.

Further, at a lower portion of the long inner side surface 1a, a first parallel line 1g on the long inner side surface 1a at a predetermined distance L3 from the first horizontal angle line 1e and a predetermined distance L4 from the first horizontal angle line 1e. The bottom surface 1 of
The second parallel line 1h on c is connected to provide a long side inclined surface 3 that is inclined downward toward the inside of the agitation tank 1, and at the lower portion of the short inner side surface 1b, the second A fourth parallel line 1k on the short inner surface 1b at a predetermined distance L3 from the horizontal angle line 1f is connected to a fourth parallel line 1m on the bottom surface 1c at a predetermined distance L4 from the second horizontal angle line 1f. A short side inclined surface 4 inclined downward toward the inside of the agitation tank 1, and the long side inclined surface 3 and the short side inclined surface 4 are formed on the corner inclined surface 2 at respective end portions. Connected and formed on a continuous surface. And L3
Is shorter than L 1 and L 4 is also shorter than L 2, the side inclined surfaces 3, 4 are partially cross-connected to the corner inclined surface 2.

  Next, the operation and effect of the stirring tank 1 of this embodiment will be described.

As shown in FIG. 1, when a stirring blade 5 fixed to the lower end of the rotating shaft is set at the center of the stirring tank 1, and the stirring blade 5 is rotated in the liquid in the stirring tank 1, the liquid is stirred. While being rotated in the tank 1, it is pushed outward and the flow of the lower part along the inner side surfaces 1a, 1b is the side inclined surface 3
4, and the upward flow as indicated by the arrow in FIG.

Therefore, stagnation of solid matter or slurry due to poor flow does not occur at the four corners in the stirring tank 1.

As a modification of the present embodiment, as shown in FIGS. 4 and 5, the long inner side surface 1 a and the short inner side surface 1 b are not directly intersected with each other at the corners of the four corners of the square stirring tank 11. The short inner side surface 1b is connected in a belt-like manner through the auxiliary side surface 1n in the oblique direction, and further provided with an auxiliary side inclined surface 6 extending from the lower part of the auxiliary side surface 1n to the bottom surface 1c. The both side inclined surfaces 3 and 4 are continuously provided with interposition.

Thus, the flow of the lower part along the inner side surfaces 1 a and 1 b accompanying the rotation of the stirring blade (not shown) becomes an upward flow by the auxiliary side inclined surface 6, and at the four corners of the stirring tank 11, Stagnation due to poor flow of slurry and the like does not occur.

  A second embodiment of the present invention will be described with reference to FIGS.

6 is a plan view of the rectangular stirring tank of Example 2, FIG. 7 is a sectional view taken along line III-III in FIG. 6, FIG. 8 is a sectional view taken along line IV-IV in FIG. 6, and FIG. FIG.

Reference numeral 21 denotes a rectangular parallelepiped stirring tank. Also in the stirring tank 21, a long side inclined surface 3 and a short side inclined surface 4 extending from the lower part of the long inner side surface 1a and the short inner side surface 1b to the bottom surface 1c. Each was provided.

The cross over between the two long sides 1b is provided with a protrusion 7 which is triangular equidistant intermediate position from both the short inner surface 1a in the rectangular bottom surface 1c.

Reference numeral 5 a denotes a stirring blade that is suspended from the center of the left and right floor surfaces 1 ca and 1 cb divided by the protrusion 7.

  Next, the operation and effect of the stirring tank 21 of this embodiment will be described.

When the stirring blades 5a are simultaneously rotated on the left and right floor surfaces 1ca and 1cb, the liquid and the like in the stirring tank 21 flows outwardly on the bottom surface 1c and is caused by the side inclined surfaces 3 and 4 as indicated by arrows in FIG. In addition to the upward flow, the ridge 7 causes an upward flow at the middle portion of the bottom surface 1c. Thus, even if the stirring blades 5a are installed on the left and right sides of the rectangular bottom surface 1c, the middle of the bottom surface 1c is provided. A stagnant part such as solid matter or slurry does not occur in the part.

The protrusion 7 may be a protrusion 7A provided with a plate-like protrusion 7a on the top of the triangular cross section as shown in FIG. 10, or both inclined sides of the triangular cross section are intermediate as shown in FIG. The ridge 7B may have a different slope, or may be a ridge 7C having a triangular cross section and curved both sides as shown in FIG.

  A third embodiment of the present invention will be described with reference to FIG.

  FIG. 13 is a plan view of the agitation tank of Example 3 of the present invention.

The agitation tank 31 of the present embodiment is formed in a rectangular shape that is long in the left-right direction, and is divided into four at equal intervals in the longitudinal direction on the rectangular bottom surface 1c, and extends between both inner surfaces 1b on the boundary line of each section. Three ridges 7 were provided. And the stirring blade 5a was provided above the center part of the floor surface of each division.

Thus, even if the stirring blades 5a of each section rotate at the same time, the protrusions 7 are provided on the boundary lines between the sections. Therefore, in each section, on the boundary line side of solid matter or slurry due to the rotation of the stirring blades 5a. The direction of the flow is upward due to the ridges 7, so that a stagnant portion such as solid matter or slurry does not occur at the boundary.

Although the example which provided the three protrusions 7 was shown in the said Example, according to the length of the longitudinal direction of a stirring tank, you may provide two protrusions or four or more at equal intervals.

The stirring tank of the present invention is used for stirring slurry or solid-liquid in water treatment, chemical industry, food industry and the like.

DESCRIPTION OF SYMBOLS 1 Stirring tank 1a Inner side surface 1b Inner side surface 1c Bottom surface 1d Vertical corner line 2 Corner inclined surface 3 Side inclined surface 4 Side inclined surface 7 Projection 11 Stirring tank 21 Stirring tank 31

Claims (6)

In a rectangular stirring tank having front and rear inner surfaces, left and right inner surfaces, and a bottom surface, the front and rear inner surfaces are formed as long inner surfaces and the left and right inner surfaces are formed as short short inner surfaces. and a rectangular, the ridges over between the long inner surface provided at the middle portion of the bottom surface Rutotomoni,
A square stirring tank , wherein a stirring blade is provided above the center of the floor surface of each section divided by the protrusions .   The rectangular stirring tank according to claim 1, wherein a side inclined surface extending from the lower part of the front and rear inner surfaces and / or the lower part of the left and right inner surfaces to the bottom surface is provided.   A corner inclined surface is provided that is inclined downward from the portion of the predetermined height of the vertical corner line where the adjacent inner side surfaces intersect to the bottom surface over the adjacent inner side surfaces, and the side inclined surface is the corner inclined surface at the end. The rectangular stirring tank according to claim 2, wherein the rectangular stirring tank is connected to the tank.   4. The square stirring tank according to claim 1, wherein one or a plurality of the protrusions are provided at equal intervals in the longitudinal direction on the bottom surface. 5.   The ridge is formed in a triangular cross-sectional shape or a triangular cross-sectional shape having both inclined sides in the middle and a different gradient, or a triangular cross-sectional shape having curved both inclined sides. The square stirring tank according to claim 1, claim 2, claim 3, or claim 4.  The square stirring tank according to claim 1, 2, 3, or 4, wherein the protrusion is formed in a triangular cross section, and a plate-like protrusion is provided at the apex thereof.

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