JP6894693B2 - Stirrer - Google Patents

Description

The present invention relates to a stirrer for stirring raw materials charged into a container.

In various fields such as chemistry, food, medicine, and energy, for example, the type of stirrer 51 shown in FIG. 23 is widely used as a stirrer for stirring raw material powder to produce a desired product. (For example, FIG. 3 of Patent Document 1, FIG. 13 of Patent Document 2, etc.).

The stirrer 51 includes a cylindrical or other rotating body-shaped container 52 for storing the raw material powder, and an agitator blade (agitator blade) that rotates around a vertical axis Z arranged at the center of the container 52 for stirring the raw material powder. Stirring blade) 53, agitator blade driving motor 57 arranged at the bottom of the container 52 to rotate drive the agitator blade 53, and improvement of powder dispersibility when mixing raw material powder and lumps when granulating. A chopper blade (crushing blade) 54 that rotates around the horizontal axis X for crushing or the like, and a chopper blade driving motor 58 that is arranged on the side peripheral portion of the container 52 and drives the chopper blade 54 to rotate are provided. By rotating the agitator blade 53, the raw material powder in the container 52 is stirred, mixed, and granulated.

The container 52 has a lid 55, and the lid 55 is opened to charge the raw material powder into the container 52. There is also a stirrer in which a raw material supply port is provided on the lid 55 and the raw material powder is charged into the container 52 through the raw material supply port.

Further, in the agitator 51 that performs granulation, a binder charging nozzle 56 for charging a binder (granulation liquid) is provided on the lid 55, and the raw material powder is charged from the binder charging nozzle 56 in the container 52. While mixing and stirring with the binder, it collides with the side wall of the container, is bounced off, is pushed upward and is inverted, and is bonded and granulated by the binder.

Further, a discharge device 59 for discharging the mixed and granulated powder or granular material products is arranged in the lower part of the side portion of the container 52. The discharge device 59 includes a discharge damper valve 60 and a discharge damper chute 61. The discharge damper valve 60 is opened by an actuator for driving the discharge damper (not shown), and the powder or granular product is placed in the container 52 from the discharge damper chute 61. Discharge from.

When mixing the raw material powder with the stirrer 51 of FIG. 23, the lid 55 is opened, a predetermined amount of the raw material powder is charged into the container 52, the lid 55 is closed, and the agitator blade 53 is placed around the vertical axis Z. When the raw material powder is rotated horizontally, the raw material powder is moved radially outward in the radial direction by the centrifugal force due to the rotation and is flipped up by the rake face 62 (see FIG. 24) of the agitator blade 53. Is given a centrifugal force and an ascending force to make a swirling motion at the bottom of the container 52 as shown by an arrow 81 in FIG. 24 and a radial reversal motion as shown by an arrow 82 in FIG. 23. repeat.

Further, when the chopper blade 54 is rotated around the horizontal axis X which is the direction orthogonal to the vertical axis Z, the raw material powder flipped up by the agitator blade 53 as shown by the arrow 82 is released from a direction different from that of the agitator blade 53. Since the cut is made, the mixing effect is further increased.

When the raw material powder is granulated by the stirrer 51 of FIG. 23, the binder (granulation liquid) is further injected from the binder charging nozzle 56 in a state where the agitator blade 53 and the chopper blade 54 are rotated and mixed. .. At this time, the chopper blade 54 has the effect of breaking the raw material powder into large lumps by the binder and crushing the raw material powder to make the particle size uniform.

However, in the conventional stirrer represented by the stirrer 51 shown in FIG. 23, the position where the chopper blade is attached, particularly the height position in the vertical direction is fixed.

Therefore, the height of the agitator blade 53 is limited, and it is not possible to use an agitator blade having an appropriate height according to the type of raw material powder (for example, density and particle size), and sufficient quality (particle size, etc.) cannot be used. ), There was a problem (first problem) such as the inability to manufacture powder or granular products. Here, the height of the agitator blade is the height of a portion located under the chopper blade when the agitator blade is rotated.

Further, in the conventional stirrer, a powder or granular material product is manufactured by setting an appropriate rotation speed of the chopper blade 54 according to the type (for example, density and particle size) of the raw material powder. Since the flow state of the raw material powder in the mixing and granulation of the raw material powder, for example, the flow state of the arrow 82 in FIG. 23 differs depending on the density and particle size of the raw material powder, the chopper blade 54 has an appropriate height according to the flow state. However, as in the conventional case, it may be difficult to produce a desired powder or granular material product by mixing or granulating by adjusting only the number of rotations of the chopper blade 54.

For example, when the raw material powder is a resin powder, a fine powder such as fly ash (fly ash) having a small specific gravity, or a powder containing air and having a property of easily expanding, in the container during mixing or granulation. Since it scatters high, there is a problem (second problem) that a sufficient crushing effect cannot be obtained with the chopper blades arranged at a low position.

Further, in the conventional stirrer, the height of the chopper blade cannot be changed. Therefore, for example, in the case of batch processing, when the amount to be charged into the container (charged amount) is small, the raw material powder layer is used. A part of the chopper blades protrudes upward, and the flow state is significantly different from the state where all the chopper blades are buried in the raw material powder layer, and a sufficient crushing effect cannot be obtained. There was also a problem (third issue).

Here, with respect to the second problem, for example, in Patent Document 1, the stirrer is provided with a lid elevating device, and the lid is moved downward as the stirring and granulation progress to pressurize the volume inside the container. It is proposed to reduce the scattering and floating of the mixed material to improve the mixing and granulating ability (Patent Document 1, page 6, line 16 to page 7, line 7).

However, in the stirrer proposed in Patent Document 1, although it is provided with a complicated lid elevating device, it only solves the second problem, and the conventional one including the first and third problems. The problem cannot be solved.

Jikkai Sho 63-12634 Japanese Unexamined Patent Publication No. 9-75703

The present invention has been made in view of the above-mentioned problems in the prior art, and the height of the chopper blade is appropriate according to the type of raw material powder, the height of the agitator blade, the amount of stirring treatment charged, the operating conditions, and the like. It is an object of the present invention to provide a stirrer which can be adjusted to.

In order to solve the above-mentioned problems, the first aspect of the present invention is a stirrer for agitating a raw material, which is arranged in a container for storing the raw material inside and a bottom of the container. The agitator is provided with a chopper arranged on the side peripheral portion of the container, and the chopper has a chopper blade arranged inside the container and a chopper blade rotation shaft connected to the chopper blade. However, it is characterized in that the height of the chopper blade rotation shaft can be adjusted.

In a second aspect of the present invention, in the first aspect, the chopper includes an eccentric sleeve through which the chopper blade rotation shaft freely penetrates, and the container is fitted with an outer peripheral surface of the eccentric sleeve. The eccentric sleeve fitting cylinder having a peripheral surface is provided, and the height of the chopper blade rotation shaft can be adjusted by rotating the eccentric sleeve around the central axis in the eccentric sleeve fitting cylinder. It is characterized by being.

In a third aspect of the present invention, in the second aspect, the eccentric sleeve fitting cylinder has a flange-shaped eccentric sleeve mounting flange on the outer peripheral side of the end portion thereof, and the eccentric sleeve has the eccentric sleeve on the outer peripheral portion thereof. The eccentric sleeve mounting flange has a flange-shaped eccentric sleeve flange that connects to the eccentric sleeve mounting flange, the eccentric sleeve flange has three or more flange through holes arranged at predetermined intervals in the circumferential direction, and the eccentric sleeve mounting flange has. The eccentric sleeve has at least an eccentric sleeve positioning hole arranged at a position corresponding to the flange through hole disposed on the eccentric sleeve flange, and a bolt is fitted into the flange through hole and the eccentric sleeve positioning hole to fit the eccentric sleeve. It is characterized in that the eccentric sleeve is connected to the container by bolting the flange and the eccentric sleeve mounting flange.

A fourth aspect of the present invention is characterized in that, in the third aspect, the number of the eccentric sleeve positioning holes is a positive multiple of the number of the flange through holes.

A fifth aspect of the present invention is characterized in that, in the third or fourth aspect, a female screw into which the bolt is screwed is formed on the inner surface of the eccentric sleeve positioning hole.

In a sixth aspect of the present invention, in the second aspect, the eccentric sleeve fitting cylinders are arranged at predetermined intervals in the circumferential direction and can move forward and backward in the direction toward the central axis of the eccentric sleeve. The eccentric sleeve has one or more wedge members, and the eccentric sleeve has a groove on the outer peripheral surface thereof into which the three or more wedge members are fitted, and the three or more eccentric sleeves are arranged in the eccentric sleeve fitting cylinder. It is characterized in that the eccentric sleeve is connected to the container by fitting the wedge member into the groove and wedge-coupling the eccentric sleeve fitting cylinder and the eccentric sleeve.

A seventh aspect of the present invention is characterized in that, in the sixth aspect, the groove is continuously formed over the entire circumference of the outer peripheral surface of the eccentric sleeve.

An eighth aspect of the present invention is characterized in that, in the second aspect, the eccentric sleeve is fixed to the eccentric sleeve fitting cylinder by a ferrule clamp method.

In a ninth aspect of the present invention, in any of the second to eighth aspects, the chopper blade rotation motor for rotating the chopper blade rotation shaft is fixed to the eccentric sleeve, and the chopper blade rotation The fixed position of the motor for the eccentric sleeve with respect to the eccentric sleeve can be changed in the rotation direction around the axis of the chopper blade rotation shaft.

According to the present invention, it is possible to realize a stirrer capable of adjusting the chopper blades to an appropriate height according to the type of raw material powder, the height of the agitator blades, the amount of stirring treatment charged, the operating conditions, and the like.

It is a figure (including a part cross section) which shows the schematic structure of the 1st Embodiment of the stirrer which concerns on this invention. It is an arrow view of the cross section AA in FIG. It is a detailed view of P part in FIG. It is an arrow view of the cross section BB in FIG. It is an arrow view of the cross section CC in FIG. It is an arrow view of the cross section DD in FIG. It is a figure of the chopper in the state where the eccentric sleeve is rotated 90 degrees with respect to the reference direction. It is an arrow view of the cross section EE in FIG. 7. It is a figure of the chopper in the state where the eccentric sleeve is rotated 180 degrees with respect to the reference direction. It is an arrow view of the cross section FF in FIG. It is a figure which shows the outline decomposition structure concept of a chopper. It is an arrow view of the cross section DD in FIG. 3 when there are 3 bolts and 6 eccentric sleeve positioning holes, (a) is a state where the eccentric sleeve is 0 degrees with respect to the reference direction, and (b) is eccentricity. The figure shows a state in which the sleeve is rotated 60 degrees with respect to the reference direction, (c) is a state in which the eccentric sleeve is rotated 120 degrees with respect to the reference direction, and (d) is a state in which the eccentric sleeve is rotated 180 degrees with respect to the reference direction. It is a figure which shows the state. It is a figure for demonstrating one modification of the said Embodiment. It is a figure which showed the main part of FIG. 13 enlarged. It is a figure for demonstrating another modification of the said Embodiment. It is an arrow view of the cross section XX in FIG. It is a figure for demonstrating another modification of the said Embodiment. It is a figure (including a part cross section) which shows the schematic structure of the chopper in the 2nd Embodiment of the stirrer which concerns on this invention. It is an arrow view of the cross section GG in FIG. It is an arrow view of the cross section HH in FIG. It is an arrow view of the cross section JJ in FIG. It is a figure which shows the result of the mixing test which confirms the difference of the brightness (the difference of the mixing ratio) by the difference in the height of the chopper blade rotation shaft. It is a figure which shows the schematic structure of the conventional general stirring granulation machine. It is an arrow view of the cross section AA in FIG. 23.

Hereinafter, embodiments of the stirrer according to the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a diagram (including a partial cross section) showing a schematic configuration of a first embodiment of the stirrer according to the present invention, and FIGS. 2 and 3 are an arrow view of a cross section AA and details of a P portion in FIG. 1, respectively. FIG. 4, FIG. 5, and FIG. 6 are arrow views of a cross section BB, a cross section CC, and a cross section DD in FIG. 3, respectively.

The stirrer 1 in the first embodiment has a container 2 in which raw materials are charged and stored, an agitator 35 that stirs the raw materials, and when the raw materials are mixed, the raw materials are cut from a direction different from that of the agitator blades to improve dispersibility. At the time of graining, it is provided with a chopper 36 that crushes the lumps and prepares the grains.

The container 2 has a substantially rotationally symmetric shape such as a cylinder whose axis of symmetry is a substantially vertical straight line, has a lid 5 that can be opened and closed on the ceiling, and closes the lid to isolate the inside from the outside. It can be sealed.

The agitator 35 is arranged at the bottom of the container 2 and is driven by the agitator blade 3 for stirring the raw material powder, the agitator blade driving motor 7 arranged below the bottom of the container 2, and the agitator blade driving motor 7 at the tip. The agitator blade 3 having a rake face 12 rotates with the agitator blade rotating shaft 20 for rotating the agitator blade 3 connected to the portion and the rotation symmetry axis of the container 2 as the rotation center axis, and the raw material powder. Stir.

In the present embodiment, three agitator blades 3 are provided at equal intervals in the circumferential direction, but the quantity is appropriately changed according to the type of raw material, the size of the container 2, and the like.

The chopper 36 is arranged on the side peripheral portion of the container 2, and has functions such as improving the dispersibility of the powder when mixing the raw material powder and crushing the lump when granulating, and the chopper blade 4 A chopper blade rotation shaft 13 that connects the chopper blade 4 to the tip and horizontally passes through the inside and outside of the side portion of the container 2 to rotate the chopper blade 4, and a chopper blade arranged outside the side portion of the container 2. A drive motor 8 is provided, and the chopper blade rotation shaft 13 is rotationally driven by the chopper blade drive motor 8, the chopper blade 4 is rotated around the central axis L2 of the chopper blade rotation shaft 13, and the raw materials are mixed when the raw materials are mixed. It is cut from a direction different from that of the agitator blade 3 to improve dispersibility, and at the time of granulation, the lump is crushed to prepare the granules.

Further, the chopper 36 includes an eccentric sleeve 18 through which the chopper blade rotation shaft 13 freely rotates, and the eccentric sleeve 18 has a substantially cylindrical outer shape and is parallel to the central axis L2 of the chopper blade rotation shaft 13. It has a central axis L1 separated by a predetermined distance. A chopper blade rotation shaft seal 15 for ensuring the sealing of the container 2 is arranged on the tip side in the penetrating portion of the eccentric sleeve 18 of the chopper blade rotation shaft 13, and the seal case 16 is used by using the seal case mounting bolt 26. It is fixed, and a chopper blade rotation shaft bearing 17 for smoothing the rotation of the chopper blade rotation shaft 13 is arranged on the rear side of the chopper blade rotation shaft seal 15.

The container 2 is provided with a cylindrical eccentric sleeve fitting cylinder 29 having an inner peripheral surface configured such that the outer peripheral surface of the substantially cylindrical eccentric sleeve 18 is rotatably fitted around the central axis L1. Has been done. Therefore, the eccentric sleeve 18 and the eccentric sleeve fitting cylinder 29 have a common central axis L1.

The eccentric sleeve fitting cylinder 29 is provided with a flange-shaped eccentric sleeve mounting flange 21 on the outer peripheral side of the end portion, and the eccentric sleeve 18 has a flange-shaped eccentric sleeve flange 21 connected to the eccentric sleeve mounting flange 21 on the outer peripheral portion. 22 is arranged.

In the chopper 36 according to the first embodiment, FIG. 3 (P portion in FIG. 1, that is, a detailed cross-sectional view of the chopper 36), FIG. 4 (arrow view of the cross section BB in FIG. 3), and FIG. 5 (cross section in FIG. 3). As shown in FIG. 6 (arrow view of CC) and FIG. 6 (arrow view of cross section DD in FIG. 3), the eccentric sleeve flange 22 has four flange through holes 30 at intervals of 90 degrees in the circumferential direction, and the eccentric sleeve. The mounting flange 21 is formed with 24 eccentric sleeve positioning holes 25 at intervals of 15 degrees in the circumferential direction (6 times the number of flange through holes). The bolt 23 is penetrated through the flange through hole 30 and the eccentric sleeve positioning hole 25, fitted, and screwed into the nut 24 arranged on the back side of the eccentric sleeve mounting flange 21, so that the eccentric sleeve mounting flange 21 and the eccentric sleeve flange 22 are inserted. By connecting and, the eccentric sleeve 18 is connected to and fixed to the container 2.

An eccentric sleeve seal 19 for sealing the inside of the container 2 is provided at the tip of the eccentric sleeve 18, and by tightening the bolt 23, a seal protruding from the container 2 in the direction of the eccentric sleeve 18. The eccentric sleeve 18 is pressed against the protrusion 37 to seal it. By arranging the eccentric sleeve seal 19 at the tip of the eccentric sleeve 18, it is possible to prevent the raw material powder from entering the fitting portion between the eccentric sleeve 18 and the eccentric sleeve fitting cylinder 29.

Since the eccentric sleeve positioning holes formed in the eccentric sleeve mounting flange 21 are formed at intervals of 15 degrees, the eccentric sleeve 18 is fitted into the eccentric sleeve 18 at a position where the eccentric sleeve 18 is rotated by 15 degrees in the eccentric sleeve fitting cylinder 29. It can be connected to the combined cylinder 29. Since the central axis L2 of the chopper blade rotating shaft 13 is eccentric with respect to the central axis L1 of the eccentric sleeve 18, the height of the chopper blade rotating shaft 13 is increased by rotating the eccentric sleeve 18 in the eccentric sleeve fitting cylinder 29. Can be changed.

3 to 6 show a state in which the central axis L2 of the chopper blade rotating shaft 13 is directly below the central axis L1 of the eccentric sleeve fitting cylinder 29, that is, the chopper blade rotating shaft 13 is in the lowest position (hereinafter, eccentricity in the vertical plane). The direction from the central axis L1 of the sleeve fitting cylinder 29 toward the central axis L2 of the chopper blade rotation shaft 13 is the "reference direction of the eccentric sleeve" M, and the state in which the reference direction of the eccentric sleeve is vertically downward is the "reference state". When the chopper blade rotation shaft 13 rotates 90 degrees and 180 degrees from the reference state in the eccentric sleeve fitting cylinder 29 due to the rotation of the eccentric sleeve 18, the height of the chopper blade rotation shaft 13 becomes higher. It changes as shown in FIGS. 7 and 8 and 9 and 10, respectively. The state in which the eccentric sleeve 18 is rotated 180 degrees from the reference state is the state in which the chopper blade rotation shaft 13 is at the maximum height.

The number of eccentric sleeve positioning holes 25 may be the same as the number of flange through holes 30, but in order to allow the height of the chopper blade rotation shaft 13 to be adjusted as little as possible, the flange through holes 30 may be provided. It is preferably more than the number. When the number of eccentric sleeve positioning holes 25 is larger than the number of flange through holes 30, the eccentric sleeve positioning holes 25 must be arranged at positions corresponding to the flange through holes 30. The number of positioning holes 25 is a positive multiple (including 1) of the number of flange through holes 30.

FIG. 11 is a diagram showing a schematic decomposition structure concept of the chopper 36.

The eccentric sleeve 18 is inserted into the eccentric sleeve fitting cylinder 29 from the outside of the side of the container 2, and connects the eccentric sleeve mounting flange 21 and the eccentric sleeve flange 22 with bolts 23 and nuts 24.

The chopper blade 4 is formed by inserting the chopper blade rotating shaft seal 15 into the seal case 16, inserting the chopper blade rotating shaft 13 into the chopper blade rotating shaft 13, fixing the chopper blade 4 with the seal case mounting bolt 26, and then sandwiching the original blade 27 and the spacer 28 between the chopper blades 4. The female screw formed at the tip of the chopper blade rotating shaft 13 fitted to the blade rotating shaft 13 is screwed into the chopper blade fixing nut 14 to fix the chopper blade rotating shaft 13.

In the above, the eccentric sleeve mounting flange 21 and the eccentric sleeve flange 22 are sandwiched between the bolt 23 and the nut 24, and the male screw of the bolt 23 and the female screw of the nut 24 are screwed to connect the nut 24. Instead of using, a female screw is formed on the inner surface of the eccentric sleeve positioning hole of the eccentric sleeve mounting flange 21, and the female screw and the male screw of the bolt 23 are screwed to form the eccentric sleeve mounting flange 21 and the eccentric sleeve flange 22. It may be connected.

In the above description, the number of the flange through holes 30, the bolts 23, and the nuts 24 is four each, but the number may be increased or decreased depending on the size of the diameter of the eccentric sleeve 18.

Here, since three points are required to specify a flat surface in space, it is necessary to evenly apply a load to the eccentric sleeve seal to ensure the sealing property, so that the flange through hole 30, the bolt 23, and the nut are used. The number of 24 is preferably 3 or more. When the number of the flange through hole 30, the bolt 23, and the nut 24 is three, the eccentric sleeve positioning hole is provided so that the chopper blade rotation shaft 13 can be adjusted to the maximum height position. The number of 25 is preferably a multiple of 2 or more of 3. In FIG. 12, when the number of flange through holes 30, bolts 23, and nuts 24 is three, the eccentric sleeve 18 is in the reference state ((a)), 60 degrees ((b)), and 120 degrees from the reference state. (C)), It is a figure which shows the state rotated 180 degrees ((d)), and the chopper blade rotation shaft 13 can be adjusted to the maximum height position.

In the above-described embodiment, the central axis L1 of the eccentric sleeve 18 is set parallel to the central axis L2 of the chopper blade rotation axis 13, but the central axis L1 and the central axis L2 need not necessarily be parallel. Instead, it may be tilted as shown in FIGS. 13 and 14.

For example, when the bottom is 0 ° and the height is 90 ° (intermediate height), if the central axis L1 of the eccentric sleeve 18 and the central axis L2 of the chopper blade rotation shaft 13 are parallel, the chopper blade rotation Since the central axis L2 of the shaft 13 does not face the rotation center axis of the agitator blade 3, the central axis L2 of the chopper blade rotation shaft 13 may be tilted in the direction toward the rotation center axis of the agitator blade 3 at 90 °.

Further, the central axis L2 of the chopper blade rotation axis 13 may be tilted by θ ° from 0 ° (parallel) in the counterclockwise direction so that tan θ = b / a with respect to the central axis L1 of the eccentric sleeve 18. Here, a is the radius inside the cylinder of the container 52, b is the amount of eccentricity at the position a of the central axis L2 of the chopper blade rotation shaft 13, and θ is the chopper blade at the position rotated by 90 ° (intermediate height). The angle at which the central axis L2 of the rotating shaft 13 faces the rotation center (center of the container) of the agitator blade 3.

When the central axis L2 of the chopper blade rotation shaft 13 is tilted with respect to the central axis L1 of the eccentric sleeve 18, the axis is upward at 90 ° or less, and the axis is downward at 90 ° or more. As described in JP-A-9-75703, when the container is not a cylinder and the chopper blade rotation axis is conical above the chopper blade rotation axis, if the amount of eccentricity is large, the chopper blade and the inner surface of the container become conical. In some cases it is better to angle it because it gets too close.

Further, as another modification, as shown in FIGS. 15 and 16, a ferrule clamp method may be adopted as the fixing method of the eccentric sleeve 18.

In the ferrule clamp method of this example, the eccentric sleeve 18 is fixed to the eccentric sleeve fitting cylinder 29 by using the clamp member 41 divided into two parts. The number of divisions of the clamp member is not limited to two, and may be three.

When the chopper blade driving motor 8 is fixed to the eccentric sleeve 18, the chopper blade driving motor 8 rotates together with the rotation of the eccentric sleeve 18.

As shown in FIG. 17, the motor terminal block 42 is attached to the chopper blade drive motor 8, and the degree of freedom in wiring the electric cable connected to the motor terminal block 42 is limited. The rotation angle range of the base 42 is also naturally limited.

Therefore, as shown in FIG. 17, a mounting flange 43 is provided on the eccentric sleeve 18 side, and a mounting flange 44 is also provided on the chopper blade drive motor 8 side. As in the case, a plurality of flange through holes may be formed in each of the mounting flanges 43 and 44, and both mounting flanges 43 and 44 may be connected to each other at a desired rotation angle position by using bolts and nuts. ..

<Second embodiment>
The second embodiment of the stirrer according to the present invention is a modification of the configuration of the chopper with respect to the first embodiment.

Therefore, in the following, the chopper and related parts will be mainly described, and the matters not explained are the same as those in the first embodiment unless there is a contradiction or the like.

FIG. 18 is a diagram (including a partial cross section) showing a schematic configuration of the chopper 36 in the second embodiment of the stirrer according to the present invention, and FIGS. 19, 20, and 21 are the cross section GG and the cross section in FIG. 18, respectively. It is an arrow view of HH and the cross section JJ.

In the chopper 36 of the second embodiment, wedge mechanisms 38 are arranged at 90 degree intervals in the circumferential direction at the end of the eccentric sleeve fitting cylinder 29 connected to the container 2.

The wedge mechanism 38 has a wedge member 32 having a rectangular cross section that moves forward and backward in the direction toward the central axis L1 of the eccentric sleeve 18, a wedge guide 33 that serves as a guide for the wedge member 32 to move forward and backward, and a wedge member 32, respectively. It is provided with a wedge nut 31 for moving forward and backward. Further, the eccentric sleeve 18 is formed with a groove 39 on the outer peripheral surface into which the tip end portion of the wedge member 32 is fitted.

The guide 33 has a through hole having a shape along the outer shape of the wedge member 32 formed on the center side, and a cylindrical surface formed on the outer surface thereof. A male screw is formed on the outer peripheral surface of the portion of the guide 33 on the side of the wedge nut 31 so that the female screw on the inner peripheral surface of the wedge nut 31 is screwed.

A through hole through which the wedge connecting screw 34 penetrates is formed in the central portion of the wedge nut 31, and a female screw formed in the central portion of the head of the wedge member 32 at the lower portion of the wedge connecting screw 34 through which the through hole penetrates. The wedge member 32 is connected to and integrated with the wedge nut 31 by being screwed into the wedge member 32. As a result, the wedge member 32 moves back and forth by rotating the wedge nut 31 that is screwed with the male screw on the outer peripheral surface of the guide 33.

An inclined surface that inclines toward the chopper blade driving motor 8 side is formed at the tip of the wedge member 32, and an inclined surface that fits into the inclined surface is formed in the groove 39.

When connecting the eccentric sleeve 18 and the eccentric sleeve fitting cylinder 29, the wedge member 32 is pressed by rotating the wedge nut 31 and pushing the head surface of the wedge member 32 with the bottom surface of the head of the wedge nut 31. The eccentric sleeve 18 is advanced toward the central axis L1. As a result, the tip of the wedge member 32 and the groove 39 are fitted, and the force of pressing the eccentric sleeve 18 toward the container 2 acts due to the action of the inclined surface, so that the eccentric sleeve seal 19 can function. ..

Since the wedge member 32 is fitted in the groove 39, when the wedge nut 31 is rotated in the opposite direction to the forward movement in order to move the wedge member 32 backward, the wedge connecting screw 34 rotates. There is a possibility that the wedge member 32 is left behind and does not move backward. Therefore, it is preferable that the directions of the wedge nut 31 screw and the wedge connecting screw 34 are opposite to each other. As a result, when the wedge nut 31 is rotated in the opposite direction to the forward movement in order to move the wedge member 32 backward, the bottom surface of the head of the wedge nut 31 comes into contact with the surface of the head of the wedge member 32. The wedge connecting screw 34 is suppressed, and the wedge member 32 can move backward integrally with the wedge nut 31.

The groove 39 formed on the outer peripheral surface of the eccentric sleeve 18 has a cross-sectional shape into which the cross-sectional shape of the wedge member 32 shown in FIG. 20 fits, and is predetermined in the circumferential direction as in the positioning hole 25 in the first embodiment. However, the cross section shown in FIG. 18 has a shape formed over the entire circumference (see FIG. 19). Even when the grooves are arranged at predetermined intervals in the circumferential direction as the cross-sectional shape to which the cross-sectional shape of the wedge member 32 shown in FIG. 20 fits, for example, the same as the positioning hole 25 in the first embodiment. By arranging the chopper blades at intervals of 15 degrees, the height of the chopper blade rotating shaft 13 can be adjusted in small steps, but only discontinuous adjustment is possible. On the other hand, when the groove has a shape in which the cross section shown in FIG. 18 is formed over the entire circumference, the eccentric sleeve 18 is fitted at an arbitrary rotation angle because the groove 39 is continuous. Since it can be connected to 29, the chopper blade rotation shaft 13 can be adjusted to an arbitrary height within a predetermined range.

As in the first embodiment, the number of wedge members 32 is preferably three or more, and the groove 39 formed on the outer peripheral surface of the eccentric sleeve 18 is a cross section of the wedge member 32 shown in FIG. When the shape is a cross-sectional shape to be fitted, the number of grooves 39 is preferably a multiple (including 1) of the number of wedge members 32, as in the positioning hole 25 in the first embodiment.

<Mixing due to changes in the height of the chopper blade rotation shaft, changes in granulation performance>
By using the stirrer according to the present embodiment, the chopper blades are adjusted to an appropriate height according to the type of raw material powder, the height of the agitator blades, the amount of the stirring process charged, the operating conditions, etc. The product can be manufactured.

Hereinafter, a test in which it has been confirmed that the mixing and granulation performance is changed by changing the height of the chopper blade rotation shaft will be described.

1 Mixing test (1) Test method Calcium carbonate (white): 95% and iron oxide (red): 5 based on "Mixing characteristics evaluation method of powder mixing device by brightness measurement" of Japan Powder Industry Technology Association % Mixed powder (charged amount 5 kg) was used as the raw material powder, and the difference in brightness due to the difference in the height of the chopper blade rotation shaft (standard height and height 30 mm above the standard height) was investigated. Hereinafter, the standard height is referred to as "lower", and the height 30 mm above the standard height is referred to as "upper".

The test was performed on two types of blades having different shapes (C-shaped blades (generally shaped as C-shaped) and straight blades (generally shaped as linear)).

(2) Test Results FIG. 22 is a diagram showing the results of a mixing test for confirming the difference in brightness (difference in mixing ratio) due to the difference in height of the chopper blade rotation shaft, and (a) is a C-shaped blade, (a). b) is the result of using a straight blade chopper. In the graphs of FIGS. 22A and 22B, the horizontal axis is the elapsed time [min] (logarithmic display) from the start of the mixing test, and the vertical axis is the brightness.

Brightness is an index showing the progress of mixing, and the smaller the brightness, the better the mixing progresses with 5% iron oxide particles (red) mixed well in 95% calcium carbonate particles (white). Shown.

From these test results, it can be seen that the progress of mixing differs depending on the height of the chopper blade rotation shaft regardless of the shape of the chopper blade.

In the test results of FIG. 22, the brightness is smaller and the mixing performance is better when the height of the chopper blade rotation shaft is higher, but such a tendency is not always common. It may not be the same, and the tendency may differ depending on the type and properties (specific gravity, particle size, etc.) of the raw material powder, the amount charged, the shape and height of the agitator blades, etc., and the type of raw material powder , The height of the chopper blade rotation shaft is set to an appropriate height by preliminary investigation, etc. according to the properties (specific gravity, particle size, etc.), the amount charged, the shape and height of the agitator blades, etc., and the mixing operation is performed. ..

2 Granulation test (1) Test method Based on the "Standard Formulation of Pharmaceuticals" of the Society of Powder Engineering, a mixed powder of lactose: cornstarch = 7: 3 in mass ratio is used as the raw material powder, and the height of the chopper blade rotation shaft is high. The difference in granulation characteristics due to the difference in mass ratio (the height conditions are the same as in the above 1 mixing test) was investigated.

Pre-mixing was performed for 1 minute, binder addition was performed for 1 minute, and granulation was performed for 10 minutes, for a total of 12 minutes. HPC powder was added as a binder at the time of mixing at 3%, and water was used as a binder at a ratio of water: powder = 1: 5. C-shaped blades were used for the chopper blades.

(2) Test results The test results for the difference in granulation characteristics of the granulated product due to the difference in the height of the chopper blade rotation shaft are shown below.

Since D10 increases as the granulation progresses, the D10 of the granulated product serves as an evaluation index indicating the progress of the granulation, and the larger the D10, the more the granulation progresses. Therefore, when the chopper blade rotation axis is set to the bottom, granulation progresses more when the chopper blade rotation axis is set to the top than when it is set to the top. It can be seen that if the chopper blade rotation axis, that is, the height of the chopper is different, the granulation performance is also different.

In the test results shown in Table 1, the progress of granulation is faster when the height of the chopper blade rotation axis is lower, but such a tendency may not always be general. Yes, the tendency may differ depending on the type and properties (specific gravity, particle size, etc.) of the raw material powder, the amount charged, the shape and height of the agitator blades, the shape of the chopper blades, etc. Granulation operation is performed by setting the height of the chopper blade rotation shaft to an appropriate height by a preliminary survey or the like according to the specific gravity, particle size, etc.), the amount charged, the shape and height of the agitator blades, and the like.

1 Stirrer 2 Container 3 Agitator blade 4 Chopper blade 5 Lid 6 Binder loading nozzle 7 Agitator blade drive motor 8 Chopper blade drive motor 9 Discharge device 10 Discharge damper valve 11 Discharge damper chute 12 Scoop surface 13 Chopper blade rotation shaft 14 Chopper blade Fixing nut 15 Chopper blade rotating shaft seal 16 Seal case 17 Chopper blade rotating shaft bearing 18 Eccentric sleeve 19 Eccentric sleeve seal 20 Agitator blade rotating shaft 21 Eccentric sleeve mounting flange 22 Eccentric sleeve flange 23 Bolt 24 Nut 25 Eccentric sleeve positioning hole 26 Seal case Mounting bolt 27 Original blade 28 Spacer 29 Eccentric sleeve fitting cylinder 30 Flange through hole 31 Wedge nut 32 Wedge member 33 Wedge guide 34 Wedge connecting screw 35 Agitator 36 Chopper 37 Sealing protrusion 38 Wedge mechanism 39 Groove 40 Inclined surface 41 Clamp member 42 Motor terminal block 43, 44 Mounting flange 51 Stirrer 52 Container 53 Agitator blade 54 Chopper blade 55 Lid 56 Binder input nozzle 57 Agitator blade drive motor 58 Chopper blade drive motor 59 Discharge device 60 Discharge damper valve 61 Discharge damper chute 62 Scoop Surface 81 Swirling motion of raw material powder by rotation of agitator blade 82 Bounce motion of raw material powder by rake face of agitator blade L1 Central axis of eccentric sleeve L2 Central axis of chopper blade rotation axis M Reference direction of eccentric sleeve X Horizontal axis Z vertical axis

Claims (8)

A stirrer for stirring raw materials
A container for storing the raw material inside it,
With the agitator placed at the bottom of the container,
A chopper arranged on the side peripheral portion of the container is provided.
The chopper has a chopper blade arranged inside the container and a chopper blade rotation shaft connected to the chopper blade.
It is configured so that the height of the chopper blade rotation shaft can be adjusted.
The chopper includes an eccentric sleeve through which the chopper blade rotation shaft freely rotates.
The container comprises an eccentric sleeve fitting tube having an inner peripheral surface to which the outer peripheral surface of the eccentric sleeve fits.
A stirrer configured so that the height of the chopper blade rotation shaft can be adjusted by rotating the eccentric sleeve around its central axis in the eccentric sleeve fitting cylinder. The eccentric sleeve fitting cylinder has a flange-shaped eccentric sleeve mounting flange on the outer peripheral side of the end portion thereof.
The eccentric sleeve has a flange-shaped eccentric sleeve flange connected to the eccentric sleeve mounting flange on the outer peripheral portion thereof.
The eccentric sleeve flange has three or more flange through holes arranged at predetermined intervals in the circumferential direction.
The eccentric sleeve mounting flange has an eccentric sleeve positioning hole arranged at least at a position corresponding to the flange through hole arranged in the eccentric sleeve flange.
The eccentric sleeve is connected to the container by fitting a bolt into the flange through hole and the eccentric sleeve positioning hole and bolting the eccentric sleeve flange and the eccentric sleeve mounting flange. The stirrer according to claim 1. The stirrer according to claim 2 , wherein the number of eccentric sleeve positioning holes is a positive multiple of the number of flange through holes. The stirrer according to claim 2 or 3 , wherein a female screw into which the bolt is screwed is formed on the inner surface of the eccentric sleeve positioning hole. The eccentric sleeve fitting cylinder has three or more wedge members arranged in the circumferential direction at predetermined intervals and capable of moving forward and backward in a direction toward the central axis of the eccentric sleeve.
The eccentric sleeve has a groove on its outer peripheral surface into which the three or more wedge members are fitted.
By fitting the three or more wedge members arranged in the eccentric sleeve fitting cylinder into the groove and wedge-joining the eccentric sleeve fitting cylinder and the eccentric sleeve, the eccentric sleeve is combined with the container. The stirrer according to claim 1 , which is configured to be connected. The stirrer according to claim 5 , wherein the groove is continuously formed over the entire circumference of the outer peripheral surface of the eccentric sleeve. The agitator according to claim 1 , wherein the eccentric sleeve is fixed to the eccentric sleeve fitting cylinder by a ferrule clamp method. A chopper blade rotation motor for rotating the chopper blade rotation shaft is fixed to the eccentric sleeve.
The stirrer according to any one of claims 1 to 7 , wherein the fixed position of the chopper blade rotation motor with respect to the eccentric sleeve can be changed in the rotation direction around the axis of the chopper blade rotation shaft. ..

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