JP2889134B2 - Vertical rotary agitator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertically rotating rotary stirrer which stirs and mixes a liquid by rotating a stirring shaft provided with a stirring blade at a lower end thereof in conjunction with a motor.

[0002]

2. Description of the Related Art Conventionally, a stirrer for stirring a liquid has a stirring blade (impeller) attached to a lower end of a stirring shaft rotated by a motor, and the liquid is stirred and fluidized by rotating the stirring blade. Thus, two or more kinds of liquids are stirred and mixed in a stirring tank to make them uniform, thereby achieving the object.
As the stirrer, for example, Japanese Utility Model Laid-Open No. 57-128330
The former involves stirring and mixing the liquid in the stirring tank while rotating the stirring blade at a fixed position, and the latter simply moves up and down without rotating the stirring plate. Thus, the liquid is stirred and mixed. Here, new materials are important materials that support the semiconductor industry, chemical industry, food industry, etc., and liquid mixing technology is indispensable in the production of new materials. Although it is decided, especially in the production process of polymer materials, foods, cosmetics, paints, and the like, mixing of high-viscosity liquids is frequently performed.

In a conventional stirrer, as shown in FIG. 1, a mounting rod 3 is mounted at a predetermined height on a support 2 established on a stand 1 by using a fixing tool 4, and a motor mounted on the tip of the mounting rod 3 is used.
A stirring blade (impeller) 8 is attached to a lower end of a stirring shaft (shaft) 7 that rotates in conjunction with the table 6, and the liquid is stirred by the stirring blade 8 that rotates at a predetermined position in the container 9 to make the liquid uniform. However, when a low-viscosity liquid was mixed, the stirring performed using a normal stirring blade 8, for example, an inclined paddle blade, a disc turbine blade, a flat plate blade blade, a propeller blade, a fan blade, etc., had good stirring efficiency. However,
When a high-viscosity liquid is mixed, the liquid is stirred and mixed around a stirring blade 8 attached to the lower end of the stirring shaft 7, but the liquid is not effectively mixed at a location away from the stirring blade 8. .

FIG. 2 shows a flow pattern of a stirring blade 8 composed of four tilting paddle blades and the like. In the case of mixing and mixing a medium-viscosity liquid, the liquid 10 in a stirring tank 9 is used. When the stirring blade 8 attached to the lower end of the stirring shaft 7 is rotated at a predetermined position, ring-shaped dead spaces A and B are formed in both upper and lower portions of the stirring blade 8. Liquid mixing of the part will not be done,
In the stirring tank 9, the stirring efficiency was low in a partial region.

[0005] In particular, when mixing a highly viscous liquid,
The liquid was circulated only around the stirring blade 8 and the liquid in the stirring tank 9 hardly moved, resulting in poor stirring and mixing. Until now, the stirring blades used in high-viscosity liquid mixing include anchor blades, helical ribbon blades, and screw blades.
There are wings or gate-type (gate) wings.
Max Blend Wing (Sumitomo Heavy Industries, Ltd.) and Full Zone Wing (Shinko Pantech) have been developed and are receiving better evaluation. However, although there is a great demand for a stirrer for large-diameter blades, there is a case where a liquid is mixed using a small-mouthed stirring tank (for example, a separable flask) in a laboratory of a university or a laboratory of a company. In many cases, there were many requests to use ordinary small-diameter wings.

[0006]

SUMMARY OF THE INVENTION As described above,
When mixing a high-viscosity liquid, the liquid is stirred around the stirring blade 8 which stirs and mixes the liquid when it is rotated at a certain position, but the liquid is not effectively mixed at a location away from the stirring blade. . That is, a ring-shaped non-mixing dead space (dea) is provided on the upper and lower sides of the stirring blade 8 rotating at a fixed position.
d space) Since A and B were generated and a long time was required until the liquid in the stirring tank 9 became uniform, the workability was extremely poor. SUMMARY OF THE INVENTION It is an object of the present invention to stir and mix a liquid by moving it up and down within a certain range while rotating a stirring shaft provided with a stirring blade at a lower end by rotation of a motor.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a housing is mounted on a mounting rod which is mounted on a column established on a stand.
A motor is inserted into a housing provided in the housing via a bearing.
The drive cylinder interlocked with the rotor is rotatably supported, a chuck is attached to the lower part, and a spiral guide groove is provided in a slide cylinder that is inserted into the drive cylinder so as to rotate and move up and down, and engages with the spiral guide groove. A guide projection is attached to a cover portion attached to the upper portion of the housing portion, and a latch pin attached to the drive cylinder is latched in an elongated hole provided in the slide cylinder. It is characterized in that it is moved up and down while rotating in the insertion hole of the cover part. In the spiral guide groove of the present invention, the upward spiral groove is continuously formed on the upper surface of the slide cylinder, and the downward spiral groove is continuously formed by crossing each other. The upper and lower ends of the upward and downward spiral grooves are formed. Are continuously formed by horizontal turning grooves to form endless. Further, according to the present invention, an elongated hole in the vertical direction is provided in a lower wall surface of a slide cylinder which is inserted into the drive cylinder so as to be rotatable and vertically movable, and a locking pin attached to the drive cylinder is engaged with the elongated hole. It is characterized by. Furthermore, the present invention is characterized in that the stirring shaft penetrates into a hollow slide cylinder and is fixed by a chuck attached to a lower portion of the slide cylinder.

[0008]

The stirring blade attached to the lower end of a stirring shaft connected to a slide cylinder movably mounted in a drive cylinder rotated by a motor is rotated to continuously connect upward and downward spiral grooves provided in the slide cylinder. The slide cylinder moves up and down within a certain range while rotating while being guided by the spiral guide groove, with the guide projection engaging with the endless spiral guide groove formed as a fulcrum. The vertical movement distance of the slide cylinder is regulated by the length of the long hole provided in the slide cylinder, and the stirring shaft attached to the slide cylinder moves up and down while rotating. Moves upward and downward while rotating, thereby preventing the formation of a dead space not only in the vicinity of the stirring blade but also above and below the stirring blade.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 3 to 6 of the drawings showing an embodiment of the present invention, a mounting rod 3 is mounted on a stand 2 shown in FIG. The distal end of the rod 3 is attached to a boss 37 provided on the upper part of the housing 16 as shown in FIG. 3 and 4, a plurality of bearings 17, 17 such as a plurality of bearings are mounted in a housing portion 15 provided in a vertical direction at a center portion of a housing 16, and a driving cylinder 18 is mounted on a central portion of the bearing portions 17, 17, respectively. It is rotatably mounted. The driving cylinder 18 has a gear portion 1 which is interlocked with a motor shaft (not shown) of a motor built in the housing.
9, a stop ring 20 is attached to the inner surface of the housing 15 so that the drive cylinder 18 does not move vertically in the housing 15 of the housing. Bearing part 1 by stop ring 20a
7 does not move vertically. Further, a locking pin 22 attached to a pin hole 21 provided in the driving cylinder 18 projects inside the driving cylinder 18. This housing 16
A cover body 11 having a vertical insertion hole 12 formed at the center is attached to the accommodation portion 15 above the accommodation portion 15 provided at the center.
Is provided.

In FIG. 7, reference numeral 25 denotes a slide cylinder which is vertically and rotatably inserted into the insertion hole 12 and the drive cylinder 18, and a chuck 26 is detachably attached to a lower end thereof. It is rotatably mounted. The stirring shaft 7 inserted through the slide cylinder 25 is
And the fastening part 27 is rotated and fixed. Since the stirring shaft 7 passes through the cylindrical slide tube 25 by loosening the chuck 26, the height of the stirring blade 8 provided at the lower end can be adjusted by moving the stirring shaft 7 in the vertical direction. A spiral guide groove 30 is formed on the upper surface of the slide cylinder 25.
A vertically elongated hole 23 is formed in the lower wall surface of the slide cylinder 25 and a locking pin 22 inserted into the pin hole 21 of the drive cylinder 18 is engaged with the elongated hole 23, and the drive cylinder 18 is connected to the drive cylinder 18. The slide cylinder 25 is fixed in the rotation direction. in this case,
The length of the elongated hole 23 is formed substantially equal to the length of the spiral guide groove 30.

Referring to FIGS. 7 and 8, an upward spiral groove 31 is formed on the upper surface of the slide cylinder 25 so as to extend diagonally upward.
Then, downward spiral grooves 32 which extend obliquely downward so as to intersect each other are formed continuously, and are formed so as to form a substantially figure-eight shape when viewed from the front. The upper and lower ends of the upward spiral groove 31 and the downward spiral groove 32 are horizontally folded grooves 33, that is, upper folded grooves 33a and lower folded grooves 3 respectively.
3b to form an endless spiral guide groove 30. That is, the spiral guide groove 30 has the cover 1
Since one end of the guide convex portion 29 attached to the through hole 13 provided in 1 is engaged, the slide cylinder 25 moves up and down continuously while rotating with the guide convex portion 29 as a fulcrum.

Next, the operation of this embodiment will be described. The stirring blade 8 attached to the lower end of the stirring shaft 7 is positioned in the liquid 10 of the stirring tank 9 to adjust the height, and the motor (shown in FIG. Z)
Is connected to an external power supply (not shown), the motor is driven and the slide cylinder 25 rotates together with the drive cylinder 18. Further, the stirring shaft 7 is fixed by the chuck 26 attached to the lower end of the slide cylinder 25,
The stirring blade 8 attached to the lower end of the stirring shaft rotates to stir the liquid. The rotation speed of the stirring blade 8 is controlled by rotating a knob 35 attached to the front of one side of the housing 16.
The rotation speed of the stirring shaft 7 can be adjusted by changing the amount of current with a device or the like. Gear part 19 linked to motor shaft
When the driving cylinder 18 is rotated via the shaft, the driving cylinder 18 and the slide cylinder 25 are fixed in the rotation direction by the locking pin 22 and rotate integrally.

In order to guide the guide projection 29 mounted in the through hole 13 of the holding portion 11 into the spiral guide groove 30 provided in the slide cylinder 25 for guiding, the rotation of the motor causes the slide cylinder 25 to rotate.
Is rotated, the guide convex portion 29 for guiding the spiral guide groove 30
The slide cylinder 25 moves up and down in the elongated hole 23 where the latch pin 22 is latched. That is, when the slide cylinder 25 is guided by the upward spiral groove 31 with the guide convex portion 29 located at a certain position as a fulcrum, the upward spiral groove 31
The downward spiral groove 32 is guided through the continuous upper return groove 33a at the upper end of the slide cylinder 25, and the slide cylinder 25 rises, and while repeating this, the stirring shaft 7 fixed to the slide cylinder 25 rotates up and down while rotating at a constant speed. Move. In this case, the distance that the slide cylinder 25 moves up and down while rotating is regulated by the length of the elongated hole 23.

FIG. 9 shows the stirring state of the vertically moving rotary stirrer, and shows the moving position (height direction) of four inclined paddle blades. That is, the dead spaces A and B existing in the stirring state of the conventional rotary stirrer shown in FIG. 2 are eliminated by the vertical movement of the stirring blade 8 while rotating, and are accommodated in the stirring tank 9. The liquid 10 is totally mixed. It has been found that the dead spaces A and B can be eliminated by moving the stirring blade 8 up and down in this manner, and the liquid can be effectively stirred and mixed.

Table 1 shows the relationship between the dimensionless mixing time constant and the Reynolds number, respectively, showing the decolorized state of the vertically moving rotary stirrer according to the present invention and the conventional rotary stirrer.
In the case of the vertically rotating rotary stirrer according to the present invention, based on the% decolorization as the end point, the dimensionless mixing time constant is about 40% smaller than that of a normal rotary stirrer when the entire decoloration is performed in the stirring tank 9. It has been found. On the other hand, it has been found that the conventional rotary stirrer has ring-shaped dead spaces A and B when the Reynolds number is less than about 100, and the stirring efficiency of the entire liquid deteriorates. In addition, 90%
In the case where decolorization (ignoring the ring-shaped dead space) is set as the end point reference, ignoring the ring-shaped dead spaces A and B, the conventional rotary stirrer has a smaller dimensionless mixing time constant. However, when the Reynolds number exceeds 70, the dimensionless mixing time constant of the vertically rotating rotary stirrer becomes smaller.

[0016]

According to the first aspect of the present invention, since the slide cylinder attached to the drive cylinder mounted on the housing moves up and down while rotating, the dead space formed in the stirring tank can be eliminated, and the stirring can be efficiently performed. Thus, there is an advantage that the liquid can be uniformly mixed and the working efficiency is further improved. According to a second aspect of the present invention, an endless spiral guide groove is provided on the upper surface of the slide cylinder and guided by a guide projection engaged with the spiral guide groove. Can be done. According to a third aspect of the present invention, a locking pin attached to the driving cylinder is hung in a long hole provided in the lower wall surface of the slide cylinder in a vertical direction, and is fixed in the rotation direction. The vertical movement distance of the rotating slide cylinder can be reliably controlled by the guide projections engaged with the guide grooves. According to the fourth aspect of the present invention, since the stirring shaft is attached to the slide cylinder so as to penetrate the stirring shaft, when the stirring shaft is fixed to the chuck, the stirring shaft can be freely moved in the vertical direction and the mounting position can be adjusted. The height can be freely adjusted in a wide range.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a conventional rotary stirrer and showing a state in which a liquid contained in a stirring tank is stirred.

FIG. 2 is a cross-sectional view illustrating a state in which a stirring blade of a conventional rotary stirrer is rotated at a fixed position to stir a high-viscosity liquid.

FIG. 3 shows a main part of a vertically moving rotary stirrer according to the present invention, in which an engagement state between a slide cylinder having a chuck at a lower portion and a guide projection mounted on a holding section is shown, and the upper limit of the slide cylinder is shown. It is principal part sectional drawing in the state lifted to the position.

FIG. 4 is a cross-sectional view of a main part in a state where the slide cylinder is lowered to a lower limit position.

FIG. 5 is a front view of a main part of the present device in which a slide cylinder is attached to a drive cylinder mounted on a housing.

FIG. 6 is a perspective view of a main part showing a state where a mounting rod is mounted on an upper portion of a housing.

FIG. 7 is a front view showing a spiral guide groove in which an upward spiral groove and a downward spiral groove are continuously and endlessly formed on an upper surface of a slide cylinder and have an approximately figure-eight shape.

8 is a sectional view taken along line XX in FIG. 7;

FIG. 9 is a cross-sectional view illustrating a state in which a stirring blade of the vertically rotating rotary stirrer according to the present invention shows a stirring state at an upper limit, an intermediate position, and a lower limit position to prevent generation of a dead space in a liquid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stand 2 Column 7 Stirring shaft 11 Cover part 12 Insertion hole 15 Housing part 16 Housing 18 Drive cylinder 22 Latch pin 23 Long hole 25 Slide cylinder 26 Chuck 29 Guide convex part 30 Spiral guide groove 31 Upward spiral groove 32 Downward spiral groove 33 Fold groove

[Table 1]

Claims (4)

(57) [Claims] A housing is mounted on a mounting rod to be mounted on a column established on a stand, and a driving cylinder interlocked with a motor is rotatably supported via a bearing in a housing portion provided in the housing. A spiral guide groove is provided in a slide cylinder which is rotatably and vertically movablely inserted into the drive cylinder by attaching a chuck to the drive cylinder, and a cover convex portion which engages with the spiral guide groove is mounted on an upper portion of the housing portion. And a hook pin attached to the drive cylinder is hooked into an elongated hole provided in the slide cylinder, and the slide cylinder is moved up and down while rotating into the insertion hole of the drive cylinder and the cover part. A vertically moving rotary stirrer, characterized in that: 2. The spiral guide groove is formed by continuously forming upward spiral grooves on the upper surface of the slide cylinder and continuously forming downward spiral grooves so as to cross each other, and the upper and lower ends of the upward and downward spiral grooves. The vertically rotating rotary stirrer according to claim 1, wherein each of the vertical stirrers is formed continuously and endlessly by horizontal turning grooves. 3. A slide cylinder, which is rotatably and vertically movably inserted into the drive cylinder, is provided with a vertically long hole in a lower wall surface of the slide cylinder, and a locking pin attached to the drive cylinder is engaged with the long hole. Item 3. A vertically moving rotary stirrer according to item 1 or 2. 4. A vertically moving rotary stirrer according to claim 1, wherein the stirrer shaft is inserted through a hollow slide cylinder and fixed by a chuck mounted at a lower portion of the slide cylinder. .