JP6976134B2 - Stirrer blade, stirrer and stirrer - Google Patents

Description

The present invention relates to a stirring blade attached to a stirring shaft of a rotating device, and more particularly to a stirring blade having an excellent defoaming effect on an object to be stirred, and a stirring machine and a stirring device using the stirring blade.

Conventionally, liquid stirring operations have been performed in various industrial fields. For example, paper, the coating machine line for applying a coating material to the surface of the sheet such as a film, coating and storing it while stirring at a stirring tank equipped with a攪agitator, coating from the stirring tank by a pump The paint is transferred to the machine, and the paint is applied to the sheet-like material by the coating machine. Stirring the paint in the stirring tank is a necessary operation from the viewpoint of uniform dispersion of paint components and ensuring coating quality, but on the other hand, bubbles may be generated as the paint is stirred. Foaming associated with such agitation of the liquid may cause inconveniences such as deterioration of production efficiency and quality, and environmental pollution.

Patent Document 1 describes a stirring blade for liquid stirring, which has excellent liquid mixing and stirring performance and is less likely to cause adhesion of bubbles due to stirring. The stirring blade described in Patent Document 1 is formed from a support plate attached to the lower end of a stirring shaft rotatably suspended in a stirring tank so as to be perpendicular to a rotation plane, and from the lower end surface of the support plate. It is configured to include a plurality of strip-shaped wings that hang down and are intermittently arranged in the longitudinal direction of the support plate.

According to Patent Document 2, in a system for reducing excess sludge generated by microbial treatment of organic sewage, it is preferable to have a screw-shaped stirring blade as a stirrer for stirring and defoaming sludge containing bubbles. Further, it is described that the angle of the screw-shaped stirring blade is preferably 5 to 85 degrees with respect to the liquid level of sludge.

Japanese Unexamined Patent Publication No. 7-787 Japanese Unexamined Patent Publication No. 2005-169252

The stirring technique described in Patent Documents 1 and 2 has room for improvement in terms of defoaming effect.
Further, even with a stirring technology having a high defoaming effect, if a high load is applied to a stirring drive source such as a motor, the stirring operation is not stable, and in severe cases, the stirring operation itself is impossible. May become. In particular, when a pump for discharging the internal agitated material to the outside is provided at the bottom of the stirring tank, the pump is a so-called mono pump that transfers liquid by the rotational movement of the rotor inserted in the stator. If the rotor is connected to the stirring shaft and the stirring blade has a large load on the stirring drive source, the rotary motion of the rotor becomes difficult and the liquid cannot be transferred by the mono pump. It may be possible.

Therefore, an object of the present invention is to provide a stirring blade, a stirring machine and a stirring device having an excellent defoaming effect even though the load on the stirring drive source is relatively small.

The present invention is a stirring blade attached to a stirring shaft of a rotating device, a supporting shaft attached to the stirring shaft and extending in a direction intersecting the axial direction of the stirring shaft, and a shaft of the supporting shaft from the supporting shaft. It is a stirring blade provided with a plurality of rod-shaped members extending in a direction intersecting the direction, and the plurality of rod-shaped members are intermittently arranged in the axial direction of the support shaft.

Further, the present invention is a stirrer including a stirring shaft that can be attached to and detached from the rotating device and a stirring blade attached to the stirring shaft, wherein the stirring blade is the stirring blade of the present invention.

Further, the present invention is a stirring device including a stirring tank in which an object to be agitated is housed, a stirring shaft rotatably installed inside the stirring tank, and a stirring blade attached to the stirring shaft. The stirring blade is the stirring blade of the present invention, and a pump for discharging the material to be agitated inside the stirring tank to the outside is provided at the bottom of the stirring tank, and the pump is a stator. The rotor is configured to include a rotor inserted into the stator, and the rotor rotates while eccentric in the stator so that the agitated object can be transferred, and the stirring shaft and the rotor can be transferred. Is a stirring device in which the rotor is rotated with the rotation of the stirring shaft.

According to the present invention, there is provided a stirring blade, a stirring machine and a stirring device having an excellent defoaming effect even though the load on the stirring drive source is relatively small.

FIG. 1 is a diagram showing a schematic configuration of an embodiment of the stirring device of the present invention. FIG. 2 is a diagram schematically showing a stirring blade and a fixture thereof in the stirring device shown in FIG. 1, a plan view of the stirring blade, and a side view of the fixture. FIG. 3 is a diagram schematically showing a stirring blade and a fixture thereof in the stirring device shown in FIG. 1, a side view of the stirring blade, and a plan view (top view or bottom view) of the fixture. ..

Hereinafter, the present invention will be described based on the preferred embodiment thereof with reference to the drawings. FIG. 1 shows a schematic configuration of a stirring device 1 which is an embodiment of the stirring device of the present invention. As shown in FIG. 1, the stirring device 1 includes a stirring tank 2 in which an object S to be stirred is housed, a stirring shaft 3 rotatably installed inside the stirring tank 2, and the stirring shaft 3. It is provided with a stirring blade 4 attached to the.

As shown in FIG. 1, the stirring tank 2 has a shape (for example, a conical shape) in which the diameter of the stirring tank gradually decreases from the upper side to the lower side. The outer shape of the stirring tank 2 is not particularly limited, and may be, for example, a bottomed cylinder whose inner diameter does not change in the vertical direction other than the shape shown in FIG. The upper part of the stirring tank 2 is covered with a lid 21. The lid 21 is formed with at least one charging port (not shown), and the material to be agitated S can be charged directly into the stirring tank 2 from the charging port or via a pipe (not shown). Above the lid 21, a rotating device 5 for rotating the stirring shaft 3 is arranged. The rotating device 5 is configured to include a driving source for stirring such as a motor, and is configured in the same manner as the rotating device in this type of stirring device.

As shown in FIG. 1, a pump 6 is provided at the bottom of the stirring tank 2 to discharge the agitated object S inside the stirring tank 2 to the outside. More specifically, at the portion of the bottom of the stirring tank 2 that intersects with the virtual extension line of the stirring shaft 3, that is, at the center of the stirring tank 2, the bottom discharge port for discharging the agitated object S inside the stirring tank 2 ( (Not shown) is provided, a pump 6 is provided at the bottom discharge port thereof, and a pipe 7 for transferring the agitated object S discharged from the pump 6 is provided.

The pump 6 includes a stator 61 and a rotor 62 inserted into the stator 61. In the pump 6, the rotor 62 rotates while eccentric in the stator 61, so that a closed space (cavity) is created in the gap between the two, and the agitated object S is transferred to the pipe 7 side together with the closed space. .. The pump 6 is configured in the same manner as a known mono pump, which is also called a snake pump or the like. As shown in FIG. 1, the stirring shaft 3 and the rotor 62 are connected to each other, and the rotor 62 rotates as the stirring shaft 3 rotates. Therefore, when the stirring blade 4 attached to the stirring shaft 3 imparts a stirring action to the stirred object S, the pump 6 transfers the stirred object S (discharged from the stirring tank 2).

The agitated substance S housed in the stirring tank 2 is usually a liquid (a substance having fluidity) at normal temperature and pressure. The agitated object S is not particularly limited, and various liquids that require an agitation operation can be applied. For example, when the stirring device 1 is used for producing a coated paper obtained by applying a coating material to a base material sheet, the agitated object S may be the coating material.

At the center position of the stirring tank 2, the stirring shaft 3 penetrates the lid 21 in the thickness direction and extends in the vertical direction Z from the inside and outside of the stirring tank 2, and the upper end side in the longitudinal direction thereof is the outside of the stirring tank 2. It is connected to the rotating device 5 arranged in. When the rotating device 5 is operated, the stirring shaft 3 rotates around the axis (direction indicated by reference numeral R in FIG. 1), and the stirring blade 4 rotates in the same direction accordingly. The stirring shaft 3 is removable from the rotating device 5.

One of the main features of the stirring device 1 of the present embodiment is the characteristic outer shape of the stirring blade 4. 2 and 3 show the stirring blade 4 and its fixture 40. Since FIG. 1 is a diagram showing a schematic configuration of the stirring device 1 including the stirring blade 4, each part of the device, such as the number of rod-shaped members 42, is simplified from FIGS. 2 and 3, and each part of the device is simplified. For details, FIG. 1 and FIGS. 2 and 3 do not always match.
The stirring blade 4 is attached to the stirring shaft 3 and extends in a direction (X direction in the figure) intersecting the axial direction of the stirring shaft 3, that is, the longitudinal direction (vertical direction Z in the figure). And a plurality of rod-shaped members 42 arranged on the support shaft 41 and extending in the axial direction of the support shaft 41, that is, in the direction intersecting the longitudinal direction (X direction in the figure) (Y direction in the figure).

The fixture 40 is a member for detachably fixing the stirring blade 4 to the stirring shaft 3, and has a stirring shaft insertion portion 40A into which the stirring shaft 3 is inserted, as shown in FIGS. 2 and 3. There is. Further, as shown in FIG. 3, one end of the support shaft 41 in the axial direction (X direction in the drawing) is inserted and fixed to the fixture 40. In the stirring device 1, the support shaft 41 is rotatably attached to the fixture 40 around the shaft. Therefore, as shown in FIG. 1, in a state where the fixture 40 to which the support shaft 41 is fixed is fixed to the stirring shaft 3, the support shaft 41 is rotatably attached to the stirring shaft 3 around the shaft. The fixture 40 preferably has a shape close to a circle, and the outer shape of the fixture 40 is preferably an isotropic shape.

In the stirring device 1, two stirring blades 4 are attached to the stirring shaft 3. As shown in FIG. 1, the two stirring blades 4 and 4 are in the same position with each other in the axial direction (vertical direction Z) of the stirring shaft 3, and as shown in FIGS. 2 and 3, one stirring blade is used. The support shaft 41 that constitutes the other stirring blade 4 is located on a virtual extension line (not shown) along the axial direction of the support shaft 41 that constitutes 4. That is, the angle formed by the axial direction of one support shaft 41 and the axial direction of the other support shaft 41 is 180 degrees, and both support shafts 41 and 41 extend in opposite directions from the stirring shaft 3. The two stirring blades 4 and 4 have the same configuration and the same shape and dimensions.

In the stirring device 1, the support shaft 41 has a circular shape in a cross-sectional view along a direction orthogonal to the axial direction (Y direction in the drawing). The delivery length of the support shaft 41 (diameter when the support shaft 41 has a circular shape in cross section) 41R (see FIG. 2) is at least a portion of the support shaft 41 that can impart a stirring action to the object to be agitated, more specifically. In particular, in the portion where the rod-shaped member 42 is intermittently arranged (the portion extending outward from the fixture 40), it is constant over the entire length in the axial direction (X direction in the figure) and substantially changes. Not. Further, in the stirring device 1, the support shaft 41 extends in a direction orthogonal to the axial direction of the stirring shaft 3, but since the axial direction of the stirring shaft 3 is the vertical direction Z, the support shaft 41 extends in the horizontal direction. The angle between the cage, that is, the support shaft 41 and the stirring shaft 3 is 90 degrees.

As shown in FIGS. 1 to 3, a plurality of rod-shaped members 42 are arranged on one support shaft 41. Each of the plurality of rod-shaped members 42 has a long shape in one direction, and its longitudinal direction intersects the axial direction of the support shaft 41 to which they are attached. In the stirring device 1, the longitudinal direction of the plurality of rod-shaped members 42 coincides with the direction orthogonal to the axial direction (X direction in the figure) of the support shaft 41 in which they are arranged (Y direction in the figure). The angle between each of the plurality of rod-shaped members 42 and the support shaft 41 is 90 degrees. Further, in the stirring device 1, each of the plurality of rod-shaped members 42 has a circular shape in a cross-sectional view along a direction orthogonal to the longitudinal direction thereof. The delivery length of the rod-shaped member 42 (diameter when the rod-shaped member 42 has a circular shape in cross section) 42R (see FIG. 2) is constant over the entire length in the axial direction, that is, the longitudinal direction, and does not substantially change. Further, the diameters 42R of the plurality of rod-shaped members 42 are the same as each other.

As shown in FIGS. 1 to 3, the plurality of rod-shaped members 42 are intermittently arranged in the axial direction (X direction in the drawing) of the support shaft 41. In the stirring device 1, the plurality of rod-shaped members 42 are intermittently arranged at equal intervals in the X direction. Further, in the stirring device 1, the pitch 42P of the plurality of rod-shaped members 42 (see FIG. 2), that is, the distance between the centers of the two rod-shaped members 42, 42 adjacent to each other in the X direction is uniform.

Further, in the stirring device 1, as shown in FIGS. 1 and 2, a part of the plurality of rod-shaped members 42 extends from one support shaft 41 in a predetermined direction, and the other part extends from the support shaft 41 in a predetermined direction. The support extends from the support shaft 41 in a direction different from the one direction, specifically, the side opposite to the one direction, and therefore, the support is provided on both sides of the support shaft 41 in the axial direction (X direction in the figure). The longitudinal end 42E of each of the plurality of rod-shaped members 42 arranged on the shaft 41 is located. In the stirring device 1, each of the plurality of rod-shaped members 42 is continuous straddling the support shaft 41 in a direction intersecting (orthogonal) with the axial direction thereof, except for both ends 42E and 42E in the longitudinal direction of the rod-shaped member 42. More specifically, the rod-shaped member 42 is fixed to the support shaft 41 at the central portion in the longitudinal direction.

In the stirring device 1, the support shaft 41 and the plurality of rod-shaped members 42 are fixed to each other by the peripheral surfaces of both members 41 and 42 as shown in FIGS. 2 and 3, and the rod-shaped member 42 is fixed to the support shaft 41. Does not penetrate. Where there are as many fixing portions of the rod-shaped members 42 on the peripheral surface of the support shaft 41 as the number of arrangements of the rod-shaped members 42 on the support shaft 41, the fixing portions of the plurality of rod-shaped members 42 are the support shaft 41. They exist at the same position in the circumferential direction. The fixing method of both members 41 and 42 is not particularly limited, and an appropriate fixing method may be selected from known fixing methods according to the materials and the like of both members 41 and 42. For example, when both members 41 and 42 are made of metal. Can exemplify welding. Further, although not shown, the rod-shaped member 42 may penetrate the support shaft 41, and in that case, a form in which the rod-shaped member 42 is inserted into a through hole formed in the support shaft 41 can be exemplified.

In the stirring device 1, the plurality of rod-shaped members 42 arranged on one support shaft 41 have an extension length 42L1 (see FIG. 2) from the support shaft 41 as shown in FIGS. 1 and 2. It includes a group of non-uniform rod-shaped members composed of a plurality of rod-shaped members 42 different from each other. In the illustrated form, all of the plurality of rod-shaped members 42 arranged on one support shaft 41 are the non-uniform rod-shaped member group, and the extension lengths 42L1 are different from each other. The directional length 42L0 (see FIG. 2) is also different. The plurality of rod-shaped members 42 constituting the non-uniform rod-shaped member group are arranged on the support shaft 41 so that the extension length 42L1 gradually shortens as the distance from the stirring shaft 3 increases.

In the stirring device 1, as shown in FIG. 2, the stirring blade 4 is symmetrically configured with respect to the support shaft 41, and in each of the plurality of rod-shaped members 42, one side and the other side sandwich the support shaft 41. The extension length 42L1 is the same.

According to the stirring device 1, since the stirring blade 4 having a characteristic external shape as described above is provided, the defoaming effect of the object to be agitated S is excellent, and the defoaming work is performed by the motor provided by the rotating device 5. It is possible to carry out the stirring operation without applying too much load to the stirring drive source such as, and it is possible to stably carry out the stirring operation in which foaming is suppressed. That is, in the stirring blade 4, a plurality of rod-shaped members 42 are freely attached to the support shaft 41 extending in the radial direction of rotation (X direction), and both ends 42E and 42E in the longitudinal direction of each rod-shaped member 42 are not fixed to other members. Since the stirring blade 4 is intermittently arranged along the X direction so as to be an end portion, when the stirring blade 4 rotates in the direction indicated by R in the figure with the rotation of the stirring shaft 3, the bubbles in the agitated object S are generated. When moving from the stirring shaft 3 side (center of rotation) to the outside in the radial direction of rotation, that is, in the direction away from the stirring shaft 3, a plurality of rod-shaped members 42 extending in a direction intersecting the moving direction are present in the moving direction of the bubbles. Due to its presence, the foam is struck by the rod-shaped member 42 during its movement and bursts into smaller bubbles. By repeating such movement of bubbles in the direction away from the stirring shaft 3 and bubble breaking by the rod-shaped member 42, the bubbles in the object to be agitated S are kept away from the stirring shaft 3 while being miniaturized, and are covered. It floats on the interface (liquid surface) between the agitated material S and air, where it bursts and disappears. As described above, the stirring device 1 is excellent in the defoaming effect of the agitated object S and can effectively reduce the amount of bubbles in the agitated object S, so that the agitated object becomes a bubble, which has been a problem in the past. It is possible to effectively prevent the inconvenience of flowing out from the stirring tank.

In particular, in the stirring device 1, in each of the two stirring blades 4 and 4, as described above, all of the plurality of rod-shaped members 42 arranged on one support shaft 41 move away from the stirring shaft 3 (support). Since the extension length 42L1 is gradually shortened (toward the tip of the shaft 41), it is particularly excellent in the above-mentioned effect of reducing the bubbles in the agitated object S as the distance from the agitation shaft 3 increases. The defoaming effect of the agitated object S is excellent, and the load on the rotating device 5 (stirring drive source) is significantly reduced as compared with the prior art. Therefore, according to the stirring device 1, the transfer of the agitated object S by the pump 6 performed with the rotation of the stirring shaft 3 is performed more smoothly.

Further, in the stirring device 1, as described above, the support shaft 41 constituting the stirring blade 4 is rotatably attached to the stirring shaft 3 around the axis of the support shaft 41 via the fixture 40. By rotating the support shaft 41 around the shaft, the angles of the plurality of rod-shaped members 42 arranged on the support shaft 41 with respect to the stirring shaft 3 (vertical direction Z) can be integrally adjusted. That is, the stirring blade 4 has a function of adjusting the arrangement angle of the rod-shaped member 42, and the angle of the rod-shaped member 42 has a considerable influence on the defoaming effect of the agitated object S and the load on the rotating device 5. Since it is an element, such an arrangement angle adjusting function can further improve both the defoaming effect of the object to be agitated and the effect of reducing the load on the stirring drive source.

From the viewpoint of more reliably achieving the above-mentioned action and effect, it is preferable to set the dimensions and the like of each part of the stirring device 1 as follows.
The transfer length 41R (see FIG. 2) in the direction orthogonal to the axial direction of the support shaft 41 is preferably 3 to 10 mm, more preferably 10 to 50 mm.
The delivery length 42R (see FIG. 2) in the direction orthogonal to the longitudinal direction of the rod-shaped member 42 is preferably 3 to 10 mm, more preferably 10 to 50 mm.
The delivery length 41R is a "diameter" when the cross-sectional view shape along the direction orthogonal to the axial direction of the support shaft 41 is circular, and the cross-sectional view shape is an anisotropic shape and has a plurality of shapes. When it has a delivery length, it means "maximum delivery length". The same applies to the delivery length 42R of the rod-shaped member 42.

The pitch 42P (see FIG. 2) of the rod-shaped member 42 is preferably 5 to 20 mm, more preferably 20 to 100 mm.
The length 42L0 (see FIG. 2) of the rod-shaped member 42 in the longitudinal direction is preferably 5 to 20 mm, more preferably 20 to 200 mm.
The extending length 42L1 (see FIG. 2) of the rod-shaped member 42 from the support shaft 41 is preferably 5 to 20 mm, more preferably 20 to 200 mm.
The ratio of the extension length between the rod-shaped member 42 (longest rod-shaped member) having the longest extension length 42L1 and the rod-shaped member 42 (shortest rod-shaped member) having the shortest extension length 42L1 is the longest rod-shaped member / shortest rod-shaped member. It is preferably 2 to 5, and more preferably 1 to 10. In the form shown in FIG. 2, the shortest rod-shaped member is the rod-shaped member 42 farthest from the stirring shaft 3, and the longest rod-shaped member is the rod-shaped member 42 closest to the stirring shaft 3.
The number of rod-shaped members 42 arranged on one support shaft 41 is preferably 5 to 10, and more preferably 10 to 30.

The cross-sectional view shape along the direction orthogonal to the axial direction of the support shaft 41 (Y direction in the figure) is not limited to a circular shape (isotropic shape), and various shapes can be adopted, for example, anisotropic shape such as a rectangular shape. It may be in shape. The same applies to the rod-shaped member 42. The material of the support shaft 41 and the rod-shaped member 42 is not particularly limited, and may be appropriately selected from a metal such as stainless steel, a synthetic resin, or the like according to the type and physical properties of the agitated object S.

From the viewpoint of reducing the load on the stirring drive source, it is preferable that the longitudinal end portion 42E of the rod-shaped member 42 has a tapered shape, that is, a shape in which the diameter gradually decreases toward the tip. At least, it is effective that the longitudinal end portion 42E, which is the front side in the rotation direction (R direction in FIG. 1) when the rod-shaped member 42 rotates, has a tapered shape.

Further, in the stirring device 1, the mounting position of the stirring blade 4 on the stirring shaft 3 is not particularly limited, and may be, for example, the bottom side of the stirring tank 2 such as in the vicinity of the pump 6, but foaming accompanying stirring of the agitated object S. As shown in FIG. 1, the interface (liquid level) between the agitated material S and the air is prevented from inconvenience that the agitated material S containing a large amount of air bubbles flows into the pump 6 more effectively. The vicinity of is preferable. More specifically, in a state where the agitated object S is housed inside the agitation tank 2 and the agitation shaft 3 is not rotating (a state in which the interface between the agitated object S and the air is not rippling), a plurality of objects are used. Of the rod-shaped members 42, the longitudinal end portion 42E (see FIG. 2) of the rod-shaped member 42 (the longest rod-shaped member in the present embodiment) closest to the stirring shaft 3 is located near the interface, for example, in the vertical direction Z from the interface. It is preferably located within 100 mm, more preferably within 5 mm.

The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention.
For example, in the stirring device 1 shown in FIG. 1, two stirring blades 4 are attached to a predetermined position (near the interface between the agitated object S and air) in the axial direction (vertical direction Z) of the stirring shaft 3. However, one or more other stirring blades 4 may be attached at the same position in the vertical direction Z with these two pieces, or another stirring blade 4 may be attached between the two stirring blades 4 and the pump 6. 4 may be attached. In the former case, it is preferable to attach three or more stirring blades 4 so that the angles formed by the two adjacent support shafts 41 and 41 in the circumferential direction of the stirring shaft 3 are uniform to each other.
Further, in the above-described embodiment, the support shaft 41 and the rod-shaped member 42, which are separate from each other, are fixed by a fixing method such as welding, but both members 41 and 42 may be integrally formed.
Further, in the above embodiment, all of the plurality of rod-shaped members 42 arranged on one support shaft 41 are the non-uniform rod-shaped member group, but even if only a part of them is the non-uniform rod-shaped member group. good.
Further, in the above embodiment, as shown in FIG. 2, the rod-shaped member 42 is continuous from one side to the other side across the support shaft 41, but is discontinuous between one side and the other side across the support shaft 41. There may be. For example, the rod-shaped member 42 may extend to one side of the support shaft 41, and the rod-shaped member 42 different from the rod-shaped member 42 may extend to the other side. Further, the rod-shaped member 42 may be arranged only on one side of the support shaft 41 and may not be arranged on the other side. Further, the angle formed by the support shaft 41 and the stirring shaft 3 may be adjustable, and such an angle may be adjusted to an angle other than 90 degrees so that the extension direction of the support shaft 41 is set to a direction other than the horizontal direction. You may.
Further, in the present invention, the plurality of rod-shaped members 42 arranged on one support shaft 41 may extend from the support shaft 41 in a direction intersecting the axial direction (X direction in the drawing). The extending direction (longitudinal direction) of the rod-shaped member 42 may be the same as or different from each other as in the above-described embodiment.
Further, in the above embodiment, the pump 6 for discharging the agitated object S to the outside is provided at the bottom of the agitating tank 2, but the pump 6 may not be provided, and a mono pump such as the pump 6, that is, the agitating shaft 3 is provided. Instead of the pump which is connected to and transfers the agitated object S with the rotation of the agitation shaft 3, a pump capable of transferring the agitated object S independently of the rotation of the agitation shaft 3 may be provided.

1 Stirring device 2 Stirring tank 3 Stirring shaft 4 Stirring blade 40 Fixture 40A Stirring shaft insertion part 41 Support shaft 42 Rod-shaped member 42E Longitudinal end of rod-shaped member 5 Rotating device 6 Pump 61 Stator 62 Rotor 7 Piping S Stirred object

Claims (7)

A stirring blade attached to the stirring shaft of a rotating device.
A support shaft attached to the stirring shaft and extending in a direction intersecting the axial direction of the stirring shaft, and a plurality of rod-shaped members extending from the support shaft in a direction intersecting the axial direction of the support shaft are provided.
The plurality of rod-shaped members are intermittently arranged in the axial direction of the support shaft so that both ends in the longitudinal direction of the plurality of rod-shaped members are free ends.
The plurality of rod-shaped members include a non-uniform rod-shaped member group composed of a plurality of the rod-shaped members having different extension lengths from the support shaft, and the plurality of rod-shaped members of the non-uniform rod-shaped member group are the stirring shaft. A stirring blade arranged on the support shaft so that the extending length gradually becomes shorter as the distance from the agitating blade increases. The stirring blade according to claim 1, wherein the end portion in the longitudinal direction of the rod-shaped member has a tapered shape. The stirring blade according to claim 1 or 2, wherein the support shaft is rotatably arranged on the stirring shaft around the shaft. A stirrer provided with a stirrer shaft that can be attached to and detached from the rotating device and a stirrer blade attached to the stirrer shaft.
A stirrer in which the stirring blade is the stirring blade according to any one of claims 1 to 3. Two stirring blades are attached to the stirring shaft, and the two stirring blades are located at the same position in the axial direction of the stirring shaft, and the axial direction of the support shaft constituting one stirring blade. The stirrer according to claim 4, wherein the support shaft constituting the other stirrer blade is located on a virtual extension line along the line. A stirring device including a stirring tank in which an object to be agitated is housed, a stirring shaft rotatably suspended inside the stirring tank, and a stirring blade attached to the stirring shaft.
The stirring blade according to any one of claims 1 to 3 is the stirring blade.
At the bottom of the stirring tank, a pump for discharging the agitated material inside the stirring tank to the outside is provided, and the pump includes a stator and a rotor inserted in the stator, and the rotor is included. By performing a rotary motion while eccentric in the stator, the agitated object can be transferred.
A stirring device in which the stirring shaft and the rotor are connected so that the rotor rotates as the stirring shaft rotates. In a state where the material to be agitated is housed inside the stirring tank and the stirring shaft is not rotating, the longitudinal end of the rod-shaped member closest to the stirring shaft among the plurality of rod-shaped members is the material to be agitated. The stirring device according to claim 6, which is located within 100 mm in the vertical direction from the interface between the air and the air.

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