JP6889924B2 - Stirring mixer - Google Patents

Description

The present invention relates to a stirring and mixing device suitable for uniformly stirring and mixing granules and powders, particularly fine powders and fibrous fine powders.

Conventionally, as an apparatus for mixing various granular, powdery, and lumpy processed products, the present inventor and the like have proposed a stirring and mixing apparatus shown in Patent Document 1. This device is a mechanism that pivotally supports a rotor in which a large number of stirring claws are spirally projected in a cylindrical processing cylinder, and discharges the processed material input from one to the other discharging end while stirring. In the example, in addition to the stirring claw of the rotor, a flat claw that crushes the lumpy processed material is attached.

On the other hand, the processed material is put in and discharged in the direction across the horizontal tubular container, and the rotor is used to not only stir the processed material in the processing container but also crush the aggregated processed material. The apparatus of Patent Document 2 is known as having a chopper for rotationally driving on the outer peripheral side of the rotation locus.

Further, the processed material is put in from above the horizontal cylinder type container, stirred, and discharged in the direct downward direction, and the chopper is projected inward from the outer peripheral side between the stirring blades (excavator blades 3) on the rotor side. Patent Document 3 is known as a product.

Japanese Patent No. 6156803 Japanese Unexamined Patent Publication No. 10-29606 Japanese Unexamined Patent Publication No. 2002-285571

The device of Patent Document 1 enhances the functionality of stirring and crushing and mixing by changing the direction and shape of the claws on the rotor side, but this type of device is generally large (for example, drum case length 3 m, inner diameter). In addition to 0.5 m), the above function depends only on the rotation of the rotor itself. Therefore, for example, when stirring and mixing fine powder and fine fiber pieces, a more uniform and highly accurate stirring and mixing degree is required. Has been done.

Further, the devices shown in Patent Documents 2 and 3 both rotate the rotating body in a horizontal tubular case by axially supporting the rotating body in the coaxial direction, and in each case, the processed material is stirred while being moved in the horizontal direction. It is not suitable for stirring while passing the case in the horizontal direction up and down, so that it is not suitable for sufficiently stirring and mixing over time while continuously supplying the processed product.

In each of the devices of Patent Documents 2 and 3, the chopper is a stirring claw mounted around the rotation axis of the rotor (in Patent Document 2, the stirring member 4 and the flow direction changing member 7 and in Patent Document 3, the stirring member 4 corresponds). A chopper is projected inward in the space outside the rotation locus or in the valley space of the rotation locus between these members. For this reason, there is a drawback that powder / granular processed material easily adheres to and remains around the mounting base end of the chopper on the inner surface of the container.

In the apparatus of the present invention for solving the above problems, first, a rotor 3 having a large number of stirring claws 13 protruding from the outer periphery of the rotating shaft 7 is pivotally supported in a tubular drum case 2, and the rotor 13 is supported. This is a stirring / mixing device that agitates the processed material charged from one end side of the drum case 2 and discharges it to the other end side while rotating the drum case 2, and the bottom portion of the cross section of the drum case 2 is close to the rotation locus L of the rotor 3. A U-shaped cross section is formed as a side wall 2a formed in a circular arc shape and the inner surface of the upper half or more of the semi-circular cross section is opened upward, and a lid 14 for closing the upper end side of the U-shaped cross section is provided. An auxiliary stirring space 17 including a corner portion between the inner surface of the side wall 2a and the inner surface of the lid 14 is formed, and the processed material scraped up or repelled by the rotor 3 is rotationally driven in the stirring space 17. Install the chopper pawl 18 to mixing and stirring the lid 14 side is protruded downward from the lid 14 side inner surface by, front and rear sides with respect to the axis of the rotary shaft 7 of the rotor 3 in a plan view of the chopper pawl 18 at predetermined intervals It is characterized by being arranged in a staggered pattern.

Secondly, the lid 14 is characterized by having a flat cross section.

Third, it is characterized by attaching the liner 16 made of rubber or plastic resilient member to the inner surface of the drum casing 2.

According to the apparatus of the present invention configured as described above, the moving or scattered processed material that has been scraped up or repelled toward the upper stirring space by the rotating stirring claw is cut by the high-speed rotation of the chopper claw. Since it is crushed or stirred in this way, the degree of mixing of the processed product is good, and even when the processed product is fine powder or fine fibrous solids or when a small amount of mixture is mixed with a large amount of material, the whole Is uniformly mixed, and there is an advantage that high homogeneity of the finished product can be ensured thereafter.

In addition, the processed material that is flipped up above the rotor is agitated by a chopper that rotates at high speed, and the falling processed material is conveyed and discharged to the discharge side while being further agitated, so that the processed material does not adhere and remain in the drum case. It is mixed and discharged.

Since the agitator is agitated in a processing space formed in the corner above the rotation locus of the agitating claw in the drum case with a large amount of air, the degree of mixing is uniform and high homogeneity can be ensured, and the chopper claw can be agitated. By arranging them separately on both sides on the axis, there is no uneven stirring, which is effective in further improving the homogeneity of the mixture.

It is an overall front view of the apparatus of this invention. Similarly, it is an overall plan view of the stirring mixer. It is an enlarged vertical sectional view of a stirring mixer. It is an enlarged bottom view of the chopper claw provided in the drum case of the apparatus of this invention. (A) and (B) are a side sectional view and a partial front view of the rotor of the apparatus of the present invention.

The illustrated embodiment will be described below. 1 to 5 show one embodiment of the apparatus of the present invention, in which a tubular drum case 2 is installed in the longitudinal (left-right) direction on a mounting frame 1 as a base, and in the longitudinal direction of the drum case 2. The rotor 3 is housed inside along the shaft, and the left and right ends are rotatably supported via bearings 4 and 6.

A motor 9 connected to the rotating shaft 7 of the rotor 3 via a clutch (or coupling) 8 is mounted on the left end side of the mounting frame 1, and the rotor 3 is rotationally driven by the motor 9. The upper part of the left end (motor side end) of the drum case 2 is provided with an input port 11 for the processed material, and the lower part of the right end is provided with an discharge port 12 for discharging the agitated and mixed processed material. Both ends are closed by the end plates 10.

A large number of stirring claws 13 are spirally and radially projected from the outer circumference of the rotating shaft 7 of the rotor 3 at regular intervals in the left-right direction, and the stirring claws 13 are feed claws as shown in FIG. 5, for example. 13a. It consists of a return claw 13b and a cut claw 13c. In this example, the feed claw 13a is a Nata claw that is twisted toward the tip and curved in a chevron shape along the direction of rotation, similar to a rotary (cultivator) claw that is generally attached to a rotary of a tractor or a cultivator. The processed material is agitated and transported in the discharge direction by the normal rotation of.

The return claw 13b is common to the feed claw 13a in that the entire return claw 13b is curved in a chevron shape, but the twisting direction toward the tip is opposite, and the forward rotation of the rotor 3 reverses the discharge (transport) operation of the processed material. It gives a return action to temporarily retain the processed material being discharged and enhances the stirring and mixing performance. Further, the cut claw 13c has a plate-shaped flat claw along the direction orthogonal to the rotation axis 7, and has an edge shape on the side end on the rotation direction side to cut and crush the processed material which has become agglomerated with the rotation of the rotor. Is.

The mechanism of the stirring / mixing device described above is the same as that of Patent Document 1 according to the proposal of the inventor and the like, but is limited to the mechanism of the device shown in the same document including the structure of the stirring claw 13. Instead, the processed material in the drum case 2 may be conveyed downward by inclining downward toward the discharge side of the drum case 2, for example, regardless of the stirring claw 13. Then, in the present invention and its examples, the cross-sectional structure of the drum case 2 and an auxiliary stirring space composed of a predetermined space on the internal rotor 3 corresponding to the cross-sectional structure are provided as compared with the apparatus of Patent Document 1. The feature is that the stirring space is provided with a chopper that stirs the processed material spun up from below by high-speed rotation, and these features will be described in detail below.

The drum case 2 has, for example, a total length of about 1802 mm, is formed in a U-shaped cross section as shown in FIG. 3, and its inner peripheral bottom surface is a concentric semicircular arc surface close to the rotation locus L of the stirring claw 13 of the rotor 3. The front and rear side walls 2a are opened vertically in the upward direction, and a flat plate-shaped lid 14 is placed on the open end to attach and fix the drum case 2, and the upper part and the left and right ends of the drum case 2 are closed. As a whole, it is formed in a tubular shape with a U-shaped cross section.

In this example, an elastic rubber liner 16 is attached to the inner surface of the drum case 2 by adhesion or screwing, and the outer diameter (rotational locus L) of the 320 mm rotor 3 and the liner 16 are attached. There is a clearance of 5 to 6 mm between the inner diameter and the inner diameter, for example, when stirring the processed product while rotating at 90 to 300 rpm, the processed product is prevented from adhering to the inner surface of the drum case 2 and high stirring performance is maintained. It is a mechanism.

On the rotation locus L of the rotor 3 in the drum case 2, the front and rear corners in the stirring space 17 formed of a deformed space surrounded by the rotation locus L, the inner surface of the lid 14, and the upper end of the side wall 2a (liner 16). A chopper claw (chopper) 18 is formed so as to project radially in all directions as shown in FIGS. 3 and 4 and the tip is bent downward so as to be rotatable horizontally and axially supported on the lid 14 side. It is provided.

In this example, the chopper claws 18 have a diameter of 165 mm, and as shown in FIGS. 1 and 2, they are arranged alternately in two rows in the front-rear direction in a staggered manner, and each chopper claw 18 is individually arranged on the lid 14. It is directly connected to the installed chopper motor 19 and is directly driven to rotate. In this example, the chopper claw 18 rotates at a high speed in the range of 1800 to 3600 rpm, and the processed material that is repelled or scraped up into the stirring space 17 from below by the rotation of the rotor 3 is further agitated by the high speed rotation of the chopper claw 18. ..

By stirring with the chopper claw 18, for example, powdery fine particles are stirred and mixed, and fine fibers are added to the fine particles, or even when a small amount of chemical agent or component is added to these fine particles or powder, they are homogeneous. Has the advantage of being able to stir and mix. In particular, in this example, the stirring claws 13 of the rotor 3 are spirally arranged on the outer periphery of the rotating shaft 7 without any gaps, and the stirring spaces 17 on the rotor 3 are also arranged in the stirring space 17 in the front-back and left-right directions as shown in FIGS. Since they are arranged alternately in a staggered pattern with almost no gaps in the direction, uneven stirring of the processed product does not occur, and even a minute mixture can be mixed at an accurate ratio with a uniform degree of mixing. ..

2 Drum case 2a Side wall 3 Rotor 7 Rotating shaft 9 Motor 11 Input port 12 Discharge port 13 Stirring claw 13a Feed claw 13b Return claw 13c Cut claw 14 Lid 16 Liner 17 Stirring space 18 Chopper claw 19 Chopper motor

Claims (3)

A rotor (3) having a large number of stirring claws (13) protruding from the outer periphery of the rotating shaft (7) is pivotally supported in a tubular drum case (2), and the drum case (13) is rotated while rotating the rotor (13). A stirring / mixing device that agitates the processed material charged from one end side of 2) and discharges it to the other end side, and the bottom portion of the cross section of the drum case (2) is close to the rotation locus (L) of the rotor (3). A lid (14) formed in a semicircular arc shape, with the inner surface of the upper half or more of the semicircular cross section having a U-shaped cross section as a side wall (2a) opened upward, and closing the upper end side of the U-shaped cross section. ) Is provided to form an auxiliary stirring space (17) including a corner portion between the inner surface of the side wall (2a) and the inner surface of the lid (14), and the rotor (3) is scraped in the stirring space (17). A chopper claw (18) for stirring and mixing the raised or repelled processed material by rotationally driving is projected downward from the inner surface on the lid (14) side and attached to the lid (14) side, and the chopper claw (18) is attached. A stirring and mixing device in which the rotors (3) are arranged in a staggered manner on both front and rear sides with respect to the axis of the rotation axis (7) of the rotor (3) in a plan view at predetermined intervals. The stirring / mixing device according to claim 1, wherein the lid (14) has a flat cross section. The stirring / mixing device according to claim 1 or 2 , wherein a liner (16) made of an elastic member made of rubber or plastic is attached to the inner surface of the drum case (2).

Images