JP4937892B2 - Container rotating mixer and heat treatment apparatus - Google Patents

Description

  The present invention relates to a container rotating mixer that stirs and mixes a stirring object accommodated in a cylindrical container by rotating the cylindrical container, and a heat treatment apparatus including the container rotating mixer.

As a conventional container rotation type mixer, a plurality of lifter plates are provided so as to protrude from the inner peripheral surface of a cylindrical container, and a stirring object (for example, a granular material) in the cylindrical container is scraped by the lifter plates and dropped. And what repeats this and stirs and mixes is known (for example, refer patent document 1).
JP 2002-45672 A (paragraph [0020], FIG. 1)

  However, in the conventional container rotating mixer described above, since the flow pattern of the stirring object in the cylindrical container is monotonous, the mixing ability is low, and it takes a long time for the stirring object to be mixed in a homogeneous state. It was.

  This invention is made in view of the said situation, Comprising: It aims at provision of the container rotation type mixer which can stir and mix the stirring object efficiently.

  In order to achieve the above object, a container rotating mixer according to the invention of claim 1 is characterized in that a lifter plate is projected from a plurality of positions on an inner peripheral surface of a cylindrical container having a central axis directed in the horizontal direction. In a container rotating mixer that rotates around the central axis and stirs the object to be stirred inside the cylindrical container, it forms a spiral shape that intersects the lifter plate and projects from the inner peripheral surface of the cylindrical container to be lower than the lifter plate. A portion of the lifter plate that protrudes from the spiral guide from the inner peripheral surface of the cylindrical container provided with a spiral guide that feeds the object to be stirred to one end of the cylindrical container when the container is normally rotated in one predetermined direction. Is characterized in that there is provided an inclined guide portion that is inclined with respect to the central axis direction of the cylindrical container and feeds the stirring object to the other end side of the cylindrical container when the cylindrical container is rotated forward. .

  The container rotation type mixer according to the invention of claim 2 is a cylindrical container in which a lifter plate is projected from a plurality of positions on an inner peripheral surface of a cylindrical container having a central axis oriented in the horizontal direction, and the cylindrical container is rotated about the central axis. In a container rotating mixer that stirs an object to be stirred inside the container, a cylindrical end wall for blocking the object to be stirred is provided at one end of the cylindrical container, and the cylindrical container is disposed at the other end of the cylindrical container. Is stopped or when it is rotated forward in one predetermined direction, the object to be stirred is dammed in the stirring chamber between the end wall of the disk and the cylindrical container is rotated negatively as opposed to forward rotation. In this case, a spiral partition wall is provided for feeding the object to be stirred from the stirring chamber to the outside of the cylindrical container, and the stirring chamber has a spiral shape intersecting the lifter plate, and the inner peripheral surface of the cylindrical container Bulges lower than the lifter plate and rotates the cylindrical container forward A spiral guide is provided to feed the stirring object to the spiral partition wall side while negatively rotating the cylindrical container while feeding the stirring object to the disk end wall side The portion of the cylindrical container protruding from the inner circumferential surface of the cylindrical container is inclined with respect to the central axis direction of the cylindrical container, and when the cylindrical container is rotated forward, the object to be stirred is sent to the spiral partition wall side. It is characterized in that an inclined guide portion is provided.

  Here, “horizontal” in the present invention includes not only “perfect horizontal” but also “substantially horizontal” slightly inclined. In addition, the “stirring object” in the present invention includes powders and flakes, pastes and slurries that are a mixture of them and liquid, and liquid.

  According to a third aspect of the present invention, in the container rotating mixer according to the second aspect, the spiral partition wall has an inner peripheral surface of 1.5 mm between the one end and the other end of the spiral partition wall. It is characterized by being formed so as to turn more than one turn.

  According to a fourth aspect of the present invention, in the container rotating mixer according to the second or third aspect, the inner peripheral surface of the cylindrical container is formed on the inner peripheral surface of the cylindrical container from the helical partition wall at the same spiral pitch as the spiral partition wall. A feature is that a spiral protruding wall with a small overhang is attached, and an outer edge portion of the helical partition wall is screwed in a state of being screwed to the spiral protruding wall.

  According to a fifth aspect of the present invention, in the container rotating mixer according to any one of the first to fourth aspects, a front end side rectangular opening is formed in a portion of the lifter plate that protrudes from the inner peripheral surface of the cylindrical container from the spiral guide. In addition, there is a feature in that an inclined guide protrusion that protrudes from the opening edge on one end side of the cylindrical container in the distal end side rectangular opening and is inclined with respect to the central axis direction of the cylindrical container is provided as an inclined guide portion.

  A sixth aspect of the present invention is the container rotating mixer according to any one of the first to fifth aspects, wherein the lifter plate includes a base end side rectangular opening formed at a base end position near the inner peripheral surface of the cylindrical container. The base end side rectangular opening extends from the pair of opening edges opposed in the central axis direction of the cylindrical container to the side approaching each other, and is inclined to the rear side in the forward rotation direction of the cylindrical container with respect to the main body of the lifter plate. It is characterized in that it has a pair of overhanging stirring protrusions.

  The seventh aspect of the invention is characterized in that, in the container rotating mixer according to the sixth aspect, the inclination angles of the pair of stirring protrusions with respect to the main body of the lifter plate are made different.

  The invention according to claim 8 is the container rotating mixer according to claim 6 or 7, wherein the positions of the base end side rectangular openings in the central axis direction of the cylindrical container are different between adjacent lifter plates. However, it has characteristics.

  The invention of claim 9 is the container rotating mixer according to any one of claims 5 to 7, wherein the lifter plate is made of sheet metal, and the inclined guide piece and the stirring protrusion are cut and raised from the lifter plate. Has characteristics.

  A tenth aspect of the invention is the container rotating mixer according to the ninth aspect, wherein the fixing bolt is provided integrally with the lifter plate and penetrates the cylindrical container inward and outward, and of the fixing bolts, the outer side of the cylindrical container protrudes. It is characterized in that it includes a fixing nut that is screwed to the tip portion and fixed the lifter plate to the cylindrical container, and a seal washer sandwiched between the fixing nut and the outer peripheral surface of the cylindrical container.

  A stirring object heat treatment apparatus according to an invention of claim 11 is a container rotating mixer according to any one of claims 1 to 10, a heat source for heating the cylindrical container from the outside, and a temperature inside the cylindrical container. A temperature measuring means for measuring the temperature and a control means for feedback-controlling the temperature inside the cylindrical container by changing the heating amount from the heat source to the cylindrical container based on the measurement result of the temperature measuring means Have

[Invention of Claim 1]
According to the container rotating mixer according to the first aspect of the present invention configured as described above, when the cylindrical container rotates in the forward direction, the stirring target accumulated in the lower part of the cylindrical container is guided by the spiral guide and Move to one end. Further, the plurality of lifter plates pass through the stirring object accumulated in the lower part of the cylindrical container one after another. The lifter plate immediately after passing through the stirring object is placed on the lifter plate and is lifted up as it is. And if a cylindrical container rotates further and a lifter board inclines to a predetermined angle, the stirring target object on a lifter board will slide down. At this time, a part of the stirring object is guided by the inclined guide part and falls obliquely toward the other end side of the cylindrical container. Furthermore, while the lifter plate moves in the stirring target accumulated in the lower part of the cylindrical container, the stirring target moves to the other end side of the cylindrical container by the inclined guide portion.

  As described above, in the cylindrical container, not only the lifting and dropping by the lifter plate are repeated, but also the spiral guide moves the stirring object to one end side of the cylindrical container, and the inclined guide part moves the stirring object to the cylindrical container. Move to the other end side. That is, the stirring object convects (circulates) in the axial direction of the cylindrical container. Therefore, the flow pattern of the stirring object becomes richer than that of the conventional apparatus that simply repeats the lifting and dropping, and the stirring object can be efficiently stirred. Thereby, a stirring target object can be mixed uniformly in a shorter time than before.

[Invention of claim 2]
According to the container rotating mixer according to the first aspect of the present invention configured as described above, when the cylindrical container rotates in the forward direction, the stirring target accumulated in the lower part of the cylindrical container is guided by the spiral guide and It moves to the disk end wall side provided at one end. Further, the plurality of lifter plates pass through the stirring object accumulated in the lower part of the cylindrical container one after another. The lifter plate immediately after passing through the stirring object is placed on the lifter plate and is lifted up as it is. And if a cylindrical container rotates further and a lifter board inclines to a predetermined angle, the stirring target object on a lifter board will slide down. At this time, a part of the stirring object is guided by the inclined guide part and falls obliquely toward the spiral partition wall provided at the other end of the cylindrical container. Furthermore, while the lifter plate moves in the stirring target accumulated in the lower part of the cylindrical container, the stirring target moves toward the spiral partition wall by the inclined guide portion.

  Thus, in the cylindrical container, not only the lifting and dropping by the lifter plate are repeated, but also the spiral guide moves the stirring object to one end side (the disk end wall side) of the cylindrical container, and the inclined guide The part moves the stirring object to the other end side (spiral partition wall side) of the cylindrical container. That is, the stirring object convects (circulates) in the axial direction of the cylindrical container. Therefore, the flow pattern of the stirring object becomes richer than that of the conventional apparatus that simply repeats the lifting and dropping, and the stirring object can be efficiently stirred. Thereby, a stirring target object can be mixed uniformly in a shorter time than before.

  Here, in the conventional “continuous” container rotation type mixer, the stirring object is forcibly moved to the discharge port while stirring the cylindrical container, so that the stirring object is forcibly mixed before being mixed homogeneously. There is a risk of being discharged. Further, in the conventional “batch type” container rotating mixer, there is a problem that it takes time and effort because the stirring object after stirring needs to be discharged by tilting the cylindrical container.

  On the other hand, according to the invention of claim 2, during the stop and forward rotation of the cylindrical container, the helical partition wall dams the object to be stirred in the stirring chamber between the disk end wall, Stirring and mixing can be continued until the stirring object becomes homogeneous. On the other hand, if the cylindrical container is negatively rotated, the spiral plate-shaped partition wall entrains the stirring object and feeds it from the stirring chamber to the outside of the cylindrical container, so that the stirring object can be discharged more easily than before. it can.

[Invention of claim 3]
In order to reliably dam the object to be agitated during the forward rotation of the cylindrical container, as in the invention of claim 3, the spiral partition wall has a 1 in the cylindrical container between its one end and the other end. It is preferable to turn more than 5 laps.

[Invention of claim 4]
According to invention of Claim 4, a helical partition wall can be attached or detached by rotating with respect to a cylindrical container inside a cylindrical container. If the spiral partition wall is removed, the inside of the cylindrical container (stirring chamber) can be easily maintained.

[Invention of claim 5]
According to the invention of claim 5, among the stirring object that is lifted upward while being placed on the lifter plate, the part that falls from the rectangular opening on the tip side slides on the upper surface of the inclined guide protrusion, Drop diagonally to the other end.

[Invention of claim 6]
According to the invention of claim 6, in the process in which the lifter plate moves under the stirring object accumulated in the cylindrical container, the stirring object colliding with the lifter plate escapes to the side, and the base side rectangular opening Flows into the club. Then, the objects to be stirred guided by the pair of stirring protrusions merge, pass through the rectangular opening, and are dispersed again by the collision with the next lifter plate. Thus, stirring can be promoted by repeating separation (dispersion and merging) of objects to be stirred.

[Invention of Claim 7]
According to the invention of claim 7, since the inclination angle of the pair of stirring protrusions with respect to the main body of the lifter plate is made different, the object to be stirred is scooped up by the lifter plate and guided by the pair of stirring protrusions downward. When falling, the drop timing can be shifted between the pair of stirring protrusions, and stirring is promoted.

[Invention of Claim 8]
According to invention of Claim 8, compared with the case where the position of the base end side rectangular opening in the central axis direction of a cylindrical container is made the same between adjacent lifter plates, the stirring object is complicated. Since it flows, stirring can be further promoted.

[Invention of claim 9]
According to the ninth aspect of the present invention, it is possible to easily manufacture a lifter plate that is integrally provided with an inclined guide protrusion and a pair of stirring protrusions.

[Invention of Claim 10]
According to the invention of claim 10, the lifter plate can be removed from the cylindrical container for replacement or maintenance. In addition, leakage of the stirring object from the hole through which the bolt for fixing the lifter plate passes can be prevented in the cylindrical container.

[Claim 11]
According to the heat treatment apparatus of the eleventh aspect, the temperature in the cylindrical container can be properly controlled, and the object to be stirred can be heat-treated (eg, dried, fired, etc.) without unevenness.

[First Embodiment]
Hereinafter, the container rotating mixer 10 of the present invention will be described with reference to FIGS. The code | symbol 11 in FIG. 1 is a rotating drum for accommodating the granular material as a stirring target object, and stirring and mixing these granular material by rotation. The rotary drum 11 is arranged so that the central axis J1 faces the horizontal direction, and is rotatable around the central axis J1.

  The rotating drum 11 includes a cylindrical large-diameter cylindrical portion 12 (corresponding to the “cylindrical container” of the present invention) and a small-diameter cylindrical portion 13 smaller in diameter than the large-diameter cylindrical portion 12, and one end of the large-diameter cylindrical portion 12. The end portion wall 14 and the small-diameter cylindrical portion 13 are connected by a disc end wall 14. A lower end portion of a hopper (not shown) storing powder particles is connected to the opening end 13A of the small diameter cylinder portion 13, and the powder particles pass through the small diameter cylinder portion 13 and the disk end wall 14. It is supplied from the supply port 11A penetrating through the center to the large-diameter cylindrical portion 12. Here, when the rotary drum 11 is rotated in a predetermined positive rotation direction, the granular material is fed into the large-diameter cylindrical portion 12 using the rotation when the rotary drum 11 is rotated in a predetermined positive rotation direction. A spiral introduction guide is provided. The “forward rotation direction” in the present embodiment is a counterclockwise direction (a direction indicated by an arrow X1 in the drawing) when the rotary drum 11 is viewed from the supply port 11A (small diameter cylindrical portion 13) side. The “negative rotation direction” opposite to the forward rotation is the clockwise direction (the direction indicated by the arrow X2 in the drawing) when viewed from the supply port 11A side. In addition, the granular material accommodated in the large diameter cylinder part 12 is dammed up by the disk end wall 14, and does not flow backward to the supply port 11A beyond the disk end wall 14.

  The rotating drum 11 is placed on a plurality of rollers 63 that are rotatably supported by a gantry 65, and is rotatably supported by the rollers 63. Specifically, an intermediate portion of the small diameter cylindrical portion 13 and a portion close to the discharge port 11B of the large diameter cylindrical portion 12 are rotatably supported by a pair of rollers 63 and 63, respectively. The rotary drum 11 is rotationally driven by a motor 60. Therefore, the sprocket 15 is fixed to the outer peripheral surface of the proximal end side (large diameter tubular portion 12 side) of the small diameter cylindrical portion 13, and the sprocket 15 and the output shaft 61 of the motor 60 are connected by the chain 62. In this embodiment, in order to make the rotating drum 11 rotatable in both positive and negative directions, a motor 60 that can rotate in both positive and negative directions is used. However, the rotating direction between the motor 60 and the rotating drum 11 is positive and negative. A reversible transmission mechanism may be provided. Further, the motor 60 and the rotating drum 11 may be connected by a belt and a pulley, or may be connected by a gear.

  A discharge port 11 </ b> B for discharging powder particles is provided at the other end of the large-diameter cylindrical portion 12 on the side opposite to the supply port 11 </ b> A. The discharge port 11B has a structure in which the entire other end surface of the large-diameter cylindrical portion 12 is opened sideways, and the end of the large-diameter cylindrical portion 12 covers the discharge port 11B from the front and the side. A discharge hood 17 is connected. The connection portion between the discharge hood 17 and the large-diameter cylindrical portion 12 is maintained in an airtight state and has a structure that allows the rotation of the rotary drum 11 with respect to the discharge hood 17. An exhaust cylinder 18 stands up from the discharge hood 17 and a discharge chute 19 extends downward. And the granular material which fell from the lower edge part of the discharge port 11B can be discharged | emitted from the discharge chute 19 outside.

  Inside the large-diameter cylindrical portion 12, a spiral guide 20 and a plurality of lifter plates 30 for stirring and mixing powder particles are provided. The spiral guide 20 is formed between the disc end wall 14 and the intermediate portion of the large-diameter cylindrical portion 12 in the rotating drum 11. The spiral guide 20 has a spiral plate shape that protrudes from the inner peripheral surface of the large-diameter cylindrical portion 12 and is wound around the central axis J1 of the rotary drum 11. The spiral of the spiral guide 20 is wound so as to approach the discharge port 11B as it goes in the forward rotation direction (arrow X1 direction) of the rotary drum 11. That is, when the rotating drum 11 is rotating forward (rotating in the direction of the arrow X1), the spiral guide 20 moves the granular material in the large-diameter cylindrical portion 12 to the disk end wall 14 (supply port 11A) side. While moving negatively (rotating in the direction of arrow X2), the granular material is provided to move toward the discharge port 11B. The spiral guide 20 of the present embodiment is made of, for example, a belt-like sheet metal and is welded to the inner peripheral surface of the rotary drum 11.

  The lifter plate 30 protrudes from the inner peripheral surface of the large-diameter cylindrical portion 12 and extends parallel to the central axis J1 of the rotary drum 11. The lifter plate 30 has a strip shape that protrudes larger than the spiral guide 20 (specifically, approximately twice the amount of protrusion of the spiral guide 20), and the disc end wall 14 and the large-diameter cylinder of the rotary drum 11 are formed. It extends between the middle part of the part 12. As shown in FIG. 2, a plurality of lifter plates 30 are provided side by side in the circumferential direction of the rotating drum 11. Specifically, the four lifter plates 30 are provided at positions separated from each other by 90 ° in the circumferential direction of the rotary drum 11.

  The lifter plate 30 is made of, for example, a belt-like sheet metal and can be attached to and detached from the rotating drum 11. Specifically, as shown in FIG. 3, fixing bolts 31 are integrally formed at a plurality of locations in the longitudinal direction of the lifter plate 30 (in the direction of the central axis J1). Corresponding to these fixing bolts 31, a plurality of bolt insertion holes 12 </ b> A are formed in a straight line in the rotary drum 11 (large diameter cylindrical portion 12). Then, the fixing bolt 31 of the lifter plate 30 is inserted into the bolt insertion hole 12A from the inside of the rotary drum 11 and penetrated, and the cap nut 32 (from the outside of the rotating drum 11 is fixed to the tip of the fixing bolt 31) The lifter plate 30 is fixed to the inside of the rotary drum 11 by screwing in (corresponding to “nut”). Further, a seal washer 33 shown in FIG. 6 is sandwiched between the cap nut 32 and the outer peripheral surface of the rotary drum 11. The seal washer 33 has a structure in which a rubber ring 33B is fixed to the inside of a circular hole formed in a metal square washer 33A. The seal washer 33 prevents leakage of the granular material from the bolt insertion hole 12A and the bag. The nut 32 is prevented from loosening. As shown in FIG. 1, the lifter plate 30 intersects with the spiral guide 20, and the spiral guide 20 is divided into slits at the intersecting portion.

  The lifter plate 30 will be described in more detail. As shown in FIG. 3, both corners in the longitudinal direction of the lifter plate 30 are cut out in a tapered shape. Further, the lifter plate 30 is formed integrally with the inclined guide protrusion 34, the first stirring protrusion 35, and the second stirring protrusion 36 by cutting and raising a part of the sheet metal constituting the lifter plate 30. .

  The inclined guide protrusion 34 is formed by cutting a sheet metal constituting the lifter plate 30 to form a strip with one end connected to the main body of the lifter plate 30 and bending one end of the strip obliquely. Has been. A plurality (specifically, two) of inclined guide protrusions 34 are provided in the longitudinal direction of the lifter plate 30. A distal end side rectangular opening 37 is formed in a portion where the inclined guide protrusion 34 is cut and raised.

  That is, the front end side rectangular opening 37 has a structure in which the inner edge portion of the lifter plate 30 protruding inward from the spiral guide 20 is recessed in a rectangular shape on the inner peripheral surface side of the rotary drum 11. Further, a plurality (specifically, two) of the front end side rectangular openings 37 are provided in the longitudinal direction of the lifter plate 30, and the inclined guide protrusions 34 are on the supply port 11 </ b> A side of the front end side rectangular openings 37. From the side edge (on the right side in FIG. 3), it extends in a cantilever shape in a state where it is inclined at a predetermined angle (for example, about 30 °) with respect to the main body of the lifter plate 30 (in the direction of the central axis J1). Specifically, as it goes from the base end portion (supply port 11A side) of the inclined guide protrusion 34 toward the front end portion (discharge port 11B side), it goes in the negative rotation direction of the rotating drum 11 (the back side in FIG. 3). And so as to protrude downward in FIG. The rectangular opening on the front end side may have a shape in which the inner edge side of the lifter plate 30 is closed.

  The first agitation protrusion 35 and the second agitation protrusion 36 are formed by cutting a sheet metal constituting the lifter plate 30 to form a pair of strips having one end connected to the lifter plate 30 main body. Are formed by bending one end of each strip piece obliquely. And the base end side rectangular opening 38 which concerns on this invention is formed in the part which cut and raised the 1st and 2nd stirring protrusion 35,36.

  As shown in FIG. 3, a plurality of base end side rectangular openings 38 are formed in the longitudinal direction of the lifter plate 30 in the inner peripheral surface side portion of the rotary drum 11. The proximal end side rectangular opening 38 is formed so as to be shifted from the distal end side rectangular opening 37 in the longitudinal direction of the lifter plate 30. That is, the lifter plate 30 is provided with the front end side rectangular openings 37 and the base end side rectangular openings 38 alternately in the longitudinal direction thereof.

  The first stirring protrusion 35 extends in a cantilever shape in a state of being inclined with respect to the main body of the lifter plate 30 from the side edge portion on the supply port 11 </ b> A side in the base end side rectangular opening 38. Specifically, the negative rotation direction X2 of the rotary drum 11 (the back side of the drawing in FIG. 3 and the figure) is directed from the base end portion (supply port 11A side) of the first stirring protrusion 35 toward the front end portion (discharge port 11B side). 4) (inclined downward in 4).

  On the other hand, the second stirring protrusion 36 extends in a cantilever shape in a state where the second stirring protrusion 36 is inclined with respect to the lifter plate 30 main body from the side edge portion on the discharge port 11B side in the base end side rectangular opening 38. Specifically, the negative rotation direction X2 of the rotary drum 11 (the back side of the drawing in FIG. 3 and the figure) is directed from the base end portion (discharge port 11B side) of the second stirring protrusion 36 toward the front end portion (supply port 11A side). 4) (inclined downward in 4).

  As described above, the first stirring protrusion 35 and the second stirring protrusion 36 protrude while inclining in the negative rotation direction X <b> 2 of the rotary drum 11 while approaching each other toward the tip. Here, as shown in FIG. 4, the inclination angle θ1 of the first stirring protrusion 35 with respect to the main body of the lifter plate 30 is larger than the inclination angle θ2 of the second stirring protrusion 36 with respect to the main body of the lifter plate 30. . Specifically, for example, the inclination angle θ1 is 45 ° to 55 °, while the inclination angle θ2 is 30 ° to 40 °.

  As shown in the development view of FIG. 9, the positions of the base end side rectangular openings 38 in the direction of the central axis J1 of the rotary drum 11 are different between the lifter plates 30 adjacent in the circumferential direction. Similarly, the positions of the front end side rectangular openings 37 in the direction of the central axis J1 of the rotary drum 11 are different between the lifter plates 30 adjacent in the circumferential direction.

  Specifically, in the circumferential direction of the rotating drum 11, the distal end side rectangular openings 37 and the proximal end side rectangular openings 38 are alternately arranged, and between the adjacent lifter plates 30, the distal end side rectangular openings are arranged. 37 and the base end side rectangular openings 38 are arranged so as to be diagonally crossed. The above is the description regarding the lifter plate 30.

  As shown in FIG. 1, a helical partition wall 40 and a discharge spiral guide plate 21 are provided in a position closer to the discharge port 11 </ b> B than the lifter plate 30 and the spiral guide 20 in the large diameter cylindrical portion 12. The discharge spiral guide plate 21 extends between the spiral partition wall 40 and the discharge port 11B. The discharge spiral guide plate 21 protrudes from the inner peripheral surface of the large diameter cylindrical portion 12 and has a spiral plate shape wound around the central axis J1 of the rotary drum 11. The protruding amount, winding direction, and spiral pitch of the discharge spiral guide plate 21 are all the same as the spiral guide 20. In addition, the discharge spiral guide plate 21 has a structure similar to that of the lifter plate 30 (fixing bolt and cap nut), for example, so that the spiral partition wall 40 described below can be inserted and removed from the discharge port 11B. 11 is removable.

  The spiral partition wall 40 is provided so as to connect the spiral guide 20 and the discharge spiral guide plate 21. The spiral partition wall 40 allows the granular material to be placed in the stirring chamber 11C between the disk end wall 14 so that the granular material is not discharged from the discharge port 11B while the rotary drum 11 is stopped and forwardly rotated. While damming, it is configured to send the powder particles from the stirring chamber 11C to the discharge port 11B side during negative rotation.

  Specifically, the spiral partition wall 40 has a spiral plate shape that largely protrudes from the inner peripheral surface of the large-diameter cylindrical portion 12 and is wound around the central axis J <b> 1 of the rotary drum 11. The spiral of the spiral partition wall 40 is wound in the same direction as the spiral guide 20. That is, it winds so that it may approach the discharge port 11B as it goes to the normal rotation direction (direction shown by arrow X1) of the rotating drum 11. In order to dam the granular material in the stirring chamber 11C by the spiral partition wall 40, the spiral partition wall 40 needs to overlap between one end and the other end. In the present embodiment, the large-diameter cylindrical portion 12 is formed between the one end portion and the other end portion of the spiral partition wall 40 so as to be able to cope with a case where a relatively large amount of powder particles is charged into the stirring chamber 11C. The inner peripheral surface of this is turned 1.5 times (see FIG. 7). Here, the turning frequency of the spiral partition wall 40 is not limited to 1.5, and may be more than 1.5. Moreover, when there are a small amount of granular materials to be stirred and mixed in the large-diameter cylindrical portion 12, the number may be less than 1.5. However, in consideration of the minimum amount of the granular material in the case of actually stirring and mixing in the large diameter cylindrical portion 12, the spiral partition wall 40 needs to be at least 1.25 rounds. And the turning frequency of the helical partition wall 40 should just be set according to the kind of stirring target object, and what is necessary is just to set according to a repose angle in the case of a granular material.

  As shown in FIG. 1, the spiral partition wall 40 protrudes inward larger than the spiral guide 20 and the lifter plate 30. The reason for this is as follows. That is, in order to efficiently stir and mix the powder particles with the rotary drum 11 provided with the lifter plate 30, as shown in FIG. 11 and FIG. It is necessary to make 30 go through. Therefore, the spiral partition wall 40 for prohibiting the discharge of the granular material needs to protrude at least inside the lifter plate 30 at least.

  Further, in the spiral partition wall 40, the inner edge portion on the side away from the inner peripheral surface of the large-diameter cylindrical portion 12 reaches the vicinity of the central axis J <b> 1 of the rotating drum 11, and is deposited on the lower portion of the rotating drum 11. It does not intersect with the surface of the granular material layer. This is to prevent powder particles from overflowing from the hole opened in the center of the spiral partition wall 40.

  In order to satisfy such a condition, in this embodiment, the amount of protrusion of the spiral partition wall 40 from the inner peripheral surface of the large-diameter cylindrical portion 12 is 85 to 90% of the inner diameter dimension of the large-diameter cylindrical portion 12 or a lifter. The amount of overhang of the plate 30 is about twice. However, the dimension of the helical partition wall 40 is not limited to this.

  In order to keep the axial dimension of the rotating drum 11 small, the helical pitch of the helical partition wall 40 (the amount of movement in the axial direction per rotation) is smaller than that of the spiral guide 20 and the discharge spiral guide plate 21. (Specifically, for example, about 1/8 of the pitch of the spiral guide 20).

  By the way, the helical partition wall 40 described above can be attached to and detached from the rotating drum 11 similarly to the lifter plate 30. In order to support the spiral partition wall 40 in the rotary drum 11, a spiral projecting wall 41 projects inward from the inner peripheral surface of the large-diameter cylindrical portion 12. As shown in FIG. 8, the spiral protruding wall 41 has a structure in which a C-shaped flat ring narrower than the spiral partition wall 40 is twisted into a spiral having the same pitch as the spiral partition wall 40. It is welded to the inner peripheral surface of the diameter cylinder part 12. In a state where the spiral protruding wall 41 and the spiral partition wall 40 are screwed together, the spiral partition wall 40 and the spiral protruded wall 41 are fixed by screws (not shown).

  When the spiral partition wall 40 is attached, the spiral partition wall 40 is inserted from the discharge port 11B of the large-diameter cylindrical portion 12 with the discharge spiral guide plate 21 removed, and the spiral partition wall 11 is inserted into the spiral drum 11. The wall 40 is rotated. Then, the spiral protruding wall 41 and the outer edge of the spiral partition wall 40 are screwed together by the action of a screw, and the end of the spiral partition wall 40 abuts against the end of the spiral guide 20 and is positioned. In this state, the spiral partition wall 40 and the spiral protruding wall 41 are screwed. On the other hand, when removing the spiral partition wall 40, the screw (not shown) that fixes the spiral partition wall 40 and the spiral protruding wall 41 is removed in a state where the discharge spiral guide plate 21 is detached, and the spiral partition wall is removed. The wall 40 is rotated with respect to the rotating drum 11 in the direction opposite to that at the time of attachment. Then, the screwing of the spiral partition wall 40 and the spiral protruding wall 41 is released, and the spiral partition wall 40 can be extracted from the discharge port 11B.

  The configuration of the container rotary mixer 10 of the present embodiment is as described above, and the operation will be described next. When a predetermined amount of powder particles is supplied into the rotating drum 11 from the supply port 11A and the rotating drum 11 is rotated in the normal rotation direction (direction indicated by the arrow X1) by the motor 60 in this state, the lifter plate 30 and The spiral guide 20 cooperates to stir and mix the powder particles in the rotary drum 11.

  That is, along with the forward rotation of the rotating drum 11, the spiral guide 20 moves the granular material deposited on the lower portion of the rotating drum 11 from the discharge port 11B side of the rotating drum 11 to the supply port 11A side (see FIG. 9). .

  Further, as shown in the change from FIG. 11 to FIG. 12, as the rotary drum 11 rotates forward, the plurality of lifter plates 30 pass through the powder particle deposition layer one after another. As shown in FIG. 12, the powder particles are placed on the lifter plate 30 immediately after having passed through the powder particle layer, and the powder particles are scraped upward as the rotary drum 11 rotates forward. When the rotation of the rotary drum 11 proceeds and the lifter plate 30 is tilted downward, and the tilt angle reaches a predetermined angle, the granular material on the lifter plate 30 slides downward. At this time, the granular material falling from the front end side rectangular opening 37 of the lifter plate 30 is not directly below but slides on the inclined guide protruding piece 34 and drops obliquely toward the discharge port 11B. Further, when the lifter plate 30 is lifted up and dropped from the proximal rectangular opening 38, the timing of dropping the granular material can be shifted between the first stirring protrusion 35 and the second stirring protrusion 36, Stir mixing is promoted (see FIG. 4).

  Further, the lifter plate 30 stirs the powder particles while moving in the powder particle deposition layer. That is, the granular material collides with the lifter plate 30 and is dispersed to the side, and flows into the proximal rectangular opening 38 and the distal rectangular opening 37 formed in the lifter plate 30 (see FIG. 13). The granular material that has flowed into the distal end side rectangular opening 37 is guided by the inclined guide protrusion 34 and moves toward the discharge port 11B. Further, when passing through the base end side rectangular opening 38, the granular material guided by the first stirring protrusion 35 and the granular material guided by the second stirring protrusion 36 merge (see FIG. 4). ). In this way, the granular material that has passed through the lifter plate 30 collides with the next lifter plate 30 and is dispersed again, thereby producing a similar flow (see FIG. 14). That is, in the accumulation layer of the granular material, a flow of sending the granular material to the discharge port 11B side is generated, and separation (dispersion and merging) of the granular material is repeated.

  Here, while the rotating drum 11 is rotating forward, the spiral partition wall 40 acts to push the powder particles back toward the supply port 11A. That is, the powder particles are blocked in the stirring chamber 11C, and the discharge of the powder particles from the discharge port 11B is prohibited. Thereby, stirring and mixing can be continued until the powder particles are uniformly mixed.

  Now, if the granular material in the rotating drum 11 is mixed homogeneously, the granular material is discharged. At this time, the rotating drum 11 is rotated in the negative rotation direction (direction indicated by the arrow X2). Then, the spiral guide 20 sends the powder particles to the spiral partition wall 40 side, and the spiral partition wall 40 entrains the powder particles in the stirring chamber 11C and sends them to the discharge port 11B side. And the granular material sent out from the stirring chamber 11C by the spiral partition wall 40 is delivered to the discharge spiral guide plate 21, is guided to the discharge spiral guide plate 21, and moves to the discharge port 11B. Spills from the lower edge.

  As described above, according to the container rotating mixer 10 of the present embodiment, not only the lifting and dropping by the lifter plate 30 are repeated in the rotating drum 11, but also the granular material is discharged by the inclined guide protrusion 34. It moves to the outlet 11B side, and the granular material moves to the supply port 11A side by the spiral guide 20. That is, the powder particles convect (circulate) in the axial direction of the rotary drum 11. In addition, while the plurality of lifter plates 30 move while diving through the granular material layer, the dispersion and merging of the granular material are repeated, and stirring and mixing are promoted. Therefore, the flow pattern of the granular material is more varied than the conventional one that simply repeats the lifting and dropping, and the granular material can be efficiently stirred and mixed. Thereby, a granular material can be mixed uniformly in a shorter time than before.

  Further, the lifter plate 30, the spiral partition wall 40, and the discharge spiral guide plate 21 can be removed from the rotating drum 11 and replaced, and maintenance (cleaning, adjustment, etc.) thereof can be performed.

[Second Embodiment]
FIG. 15 shows a heat treatment apparatus 100 provided with the container rotating mixer 10 of the first embodiment. The heat treatment apparatus 100 has the same structure as a so-called “external heat type rotary kiln”, and an electric heater 80 as a “heat source” of the present invention is provided below the rotary drum 11. Heat treatment is performed on the granular material being stirred and mixed in the rotary drum 11 by the heat of the electric heater 80.

  The heat treatment apparatus 100 includes two different temperature sensors 81 and 82 (corresponding to “temperature measuring means” of the present invention) in order to measure the temperature in the rotating drum 11. Specifically, a first temperature sensor 81 using a resistance temperature detector as a detection element and a second temperature sensor 82 using a thermocouple as a detection element, the temperature of the central portion of the rotating drum 11 being a first temperature sensor. The second temperature sensor 82 measures the temperature of the inner peripheral surface of the large-diameter cylindrical portion 12. In addition, since a thermocouple and a resistance temperature detector are well-known, detailed description is abbreviate | omitted.

  Protective tubes 81A, 82A provided at the tip portions of the temperature sensors 81, 82 are inserted from the discharge port 11B of the rotary drum 11, penetrate through the central hole of the spiral partition wall 40, and are inside the large-diameter cylindrical portion 12. It has reached the stirring chamber 11C. The tip portion of the first temperature sensor 81 is disposed in the vicinity of the rotation center of the rotary drum 11. The second temperature sensor 82 includes a plurality of thermocouples, and the hot contacts (thermal contacts) of the plurality of thermocouples are attached at equal intervals in the circumferential direction of the inner peripheral surface of the large-diameter cylindrical portion 12. The temperature at a plurality of locations on the inner peripheral surface can be measured.

  Each temperature sensor 81, 82 is held by a sensor holder 83 that rotates integrally with the rotary drum 11. As shown in FIG. 17, the sensor holder 83 integrally includes a disk portion 84 having a smaller diameter than the discharge port 11 </ b> B and a columnar portion 85 having a smaller diameter than the disk portion 84, and a plurality (specifically, from the disk portion 84. Are provided with three fixed convex pieces 84A projecting radially. As shown in FIG. 18, the plurality of fixed projecting pieces 84 </ b> A are spirally fastened to the plurality of bracket pieces 16 </ b> A projecting inside the discharge port 11 </ b> B of the rotary drum 11. In addition, an annular gap is formed between the peripheral edge of the discharge port 11B and the disc portion 84, and the granular material is discharged from here.

  The protective tubes 81A and 82A of the temperature sensors 81 and 82 pass through the cylindrical portion 85 of the sensor holder 83, and the base ends of the protective tubes 81A and 82A protruding from the end surface of the cylindrical portion 85 are fixing brackets. It is fixed to the sensor holder 83 by 86, 86 (specifically, compression fitting).

  Further, the compensating lead wire 81B extending from the protective tube 81A through the sleeve in the first temperature sensor 81 and the lead wire 82B extending from the protective tube 82A through the sleeve in the second temperature sensor 82 are the rotating drum. 11 and the sensor holder 83 are connected to the rotation side of the rotary connector 87 that can rotate together. The output terminal 87A provided on the fixed side of the rotary connector 87 and the control device 90 (corresponding to the “control means” of the present invention) are connected. The control device 90 changes the output (heat generation amount) of the electric heater 80 based on the measurement result by the first temperature sensor 81 or the second temperature sensor 82, and the inside of the large-diameter cylindrical portion 11 (the stirring chamber 11 </ b> C). Feedback control of temperature. Thereby, the inside of the rotating drum 11 is maintained at a predetermined temperature set in advance. Since the rotary connector 87 and the sensor holder 83 are connected by a flexible shaft 88 formed by winding a steel wire in a coil shape, the rotary connector 87, the rotary drum 11 and the sensor holder 83 are strictly connected. There is no need for centering, and a slight misalignment can be allowed.

  According to the heat treatment apparatus 100 of the present embodiment, the temperature management in the stirring chamber 11C of the large-diameter cylindrical portion 11 can be appropriately performed, and the granular material is heat-treated (eg, dried or baked) without unevenness. Can do.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the above embodiment, the rotary drum 11 has a configuration including the large-diameter cylindrical portion 12 and the small-diameter cylindrical portion 13, but has a configuration without the small-diameter cylindrical portion 13 as shown in FIG. It is good also as a structure which inserted directly the chute | shoot 91 of the hopper (not shown) which stored the granular material in 11 A of large diameter cylinder parts.

  (2) In the above embodiment, “powder” is exemplified as the stirring object to be stirred, mixed, and heated by the container rotating mixer 10 and the heat treatment apparatus 100. However, flakes, slurry, paste, and liquid Stir mixing and heat treatment may be performed.

  (3) The number and arrangement of the lifter plates 30 are not limited to the above embodiment. Further, the number of the front end side rectangular openings 37, the base end side rectangular openings 38, the inclined guide protrusions 34, the first and second stirring protrusions 35, 36 formed in each lifter plate 30 is also limited to the above embodiment. is not.

  (4) The heat source of the heat treatment apparatus 100 is not limited to the electric heater 80, and the combustion heat of fuel (heavy oil, gas, etc.) may be used.

  (5) In the second embodiment, the heating is performed from the outside of the rotating drum 11, but the heating may be performed by arranging a heat source inside the rotating drum 11 (so-called "internal heating type"). Specifically, hot air may be blown into the large-diameter cylindrical portion 12 or an electric heater may be disposed at the center of the large-diameter cylindrical portion 12.

  (6) The central axis J1 of the rotary drum 12 may be substantially horizontal (for example, tilted 5 to 10 degrees with respect to perfect horizontal) so that the supply port 11A is slightly upward or downward.

  (7) The measurement results of the temperature sensors 81 and 82 may be taken into the control device 90 wirelessly.

  (8) In the above embodiment, the lifter plate 30, the spiral partition wall 40, and the discharge spiral guide plate 21 are detachable, but may be welded to the inner peripheral surface of the large-diameter cylindrical portion 12.

  (9) In the above embodiment, the lifter plate 30 extends parallel to the central axis J1 of the rotating drum 11, but may be slightly inclined with respect to the central axis J1 of the rotating drum 11.

  (10) The inclination angle θ1 of the first stirring protrusion 35 with respect to the main body of the lifter plate 30 may be smaller than the inclination angle θ2 of the second stirring protrusion 36 with respect to the main body of the lifter plate 30.

  (11) Although not included in the technical scope of the present invention, the center of the rotating drum 12 is such that the object to be stirred is in the form of flakes or lumps that are easily reversed or rolled, and the discharge port 11B faces slightly downward. When the axis J1 is substantially horizontal, only the spiral guide 20 is provided in the stirring chamber 11C without providing the lifter plate, and the stirring target is sent to the spiral partition wall 40 side by the inclination of the rotating drum 11. It may be.

Side sectional view of a container rotary mixer according to the first embodiment of the present invention. Sectional view of the container rotating mixer as seen from the supply port side Side view of lifter plate Top view of lifter plate Sectional view showing mounting structure of lifter plate (A) Perspective view of seal washer, (B) Cross section of seal washer Perspective view of spiral partition The perspective view which shows the latching state of a helical partition wall and a partition plate support wall Developed container rotation mixer Cross-sectional perspective view of container rotating mixer during normal rotation Sectional view of the rotating container mixer during forward rotation as seen from the supply port side Sectional view of the rotating container mixer during forward rotation as seen from the supply port side Conceptual diagram showing the dispersion action of powder particles by lifter plate Conceptual diagram showing the union action of powder particles by lifter plate Side sectional view of the heat treatment apparatus according to the second embodiment Partial enlarged view of heat treatment equipment Top view of sensor holder View of rotating container mixer from the discharge port side Partial sectional view of a container rotary mixer according to a modification

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Container rotation type mixer 11 Rotating drum 11C Stirring chamber 12 Large diameter cylindrical part (cylindrical container)
20 spiral guide 21 discharge spiral guide plate 30 lifter plate 31 fixing bolt 32 cap nut (fixing nut)
33 Seal washer 34 Inclined guide protrusion (inclined guide part)
35 1st stirring piece (stirring piece)
36 Second stirring piece (stirring piece)
37 Front end side rectangular opening 38 Base end side rectangular opening 40 Spiral partition wall 41 Spiral protruding wall 80 Heater (heat source)
81, 82 Temperature sensor (temperature measuring means)
90 Control device 100 Heat treatment device J1 Central axis

Claims (11)

A container that stirs an object to be stirred inside the cylindrical container by projecting a lifter plate from a plurality of positions on the inner peripheral surface of the cylindrical container with the central axis facing the horizontal direction and rotating the cylindrical container around the central axis. In a rotary mixer,
A spiral shape intersecting the lifter plate, projecting lower than the lifter plate from the inner peripheral surface of the cylindrical container, and when the cylindrical container is normally rotated in a predetermined direction, the stirring object is A spiral guide is provided to feed one end of the container;
A portion of the lifter plate that protrudes from the inner circumferential surface of the cylindrical container from the spiral guide is inclined with respect to the central axis direction of the cylindrical container, and the stirring target is obtained when the cylindrical container is rotated forward. A container rotating mixer characterized in that an inclined guide portion for feeding an object to the other end side of the cylindrical container is provided. A container that stirs an object to be stirred inside the cylindrical container by projecting a lifter plate from a plurality of positions on the inner peripheral surface of the cylindrical container with the central axis facing the horizontal direction and rotating the cylindrical container around the central axis. In a rotary mixer,
One end of the cylindrical container is provided with a disk end wall for damming the stirring object,
The other end of the cylindrical container dams the object to be stirred into the stirring chamber between the disk end wall when the cylindrical container is stopped or rotated forward in a predetermined direction. On the other hand, when the cylindrical container is negatively rotated in the opposite direction to the positive rotation, a spiral partition wall is provided for feeding the stirring object from the stirring chamber to the outside of the cylindrical container,
In the stirring chamber, a spiral shape intersecting with the lifter plate is formed so as to protrude below the lifter plate from the inner peripheral surface of the cylindrical container, and when the cylindrical container is rotated in the forward direction, the stirring object is A spiral guide that feeds the stirring object to the spiral partition wall side when the cylindrical container is negatively rotated while being fed to the disk end wall side is provided,
A portion of the lifter plate that protrudes from the inner circumferential surface of the cylindrical container from the spiral guide is inclined with respect to the central axis direction of the cylindrical container, and the stirring target is obtained when the cylindrical container is rotated forward. A container rotation type mixer provided with an inclined guide portion for feeding an object to the spiral partition wall side.   The spiral partition wall is formed so as to swivel the inner peripheral surface of the cylindrical container 1.5 times or more between one end portion and the other end portion of the spiral partition wall. The container rotary mixer described in 1.   A spiral protruding wall is attached to the inner peripheral surface of the cylindrical container at the same spiral pitch as the spiral partition wall and has a smaller protruding amount from the inner peripheral surface of the cylindrical container than the spiral partition wall. The container rotating mixer according to claim 2 or 3, wherein an outer edge portion of the wall is screwed in a state of being screwed into the spiral protruding wall.   A tip-side rectangular opening is formed in a portion of the lifter plate that protrudes from the inner peripheral surface of the cylindrical container from the spiral guide, and from the opening edge on one end side of the cylindrical container of the tip-side rectangular opening. The container rotating mixer according to any one of claims 1 to 4, characterized in that an inclined guide protruding piece that protrudes and is inclined with respect to a central axis direction of the cylindrical container is provided as the inclined guide portion. A base end side rectangular opening formed penetrating at a base end position near the inner peripheral surface of the cylindrical container of the lifter plate;
Out of the rectangular opening on the base end side, the pair of opening edges facing each other in the direction of the central axis of the cylindrical container extend toward the side approaching each other, and the rear side of the cylindrical container in the positive rotation direction with respect to the main body of the lifter plate A container rotating mixer according to any one of claims 1 to 5, further comprising a pair of agitation protrusions projecting obliquely.   The container rotating mixer according to claim 6, wherein the inclination angle of the pair of stirring protrusions with respect to the main body of the lifter plate is varied.   The container rotary mixer according to claim 6 or 7, wherein positions of the base end side rectangular openings in the central axis direction of the cylindrical container are made different between the adjacent lifter plates.   The container rotary mixer according to any one of claims 5 to 7, wherein the lifter plate is made of sheet metal, and the inclined guide piece and the stirring protrusion are cut and raised from the lifter plate. A fixing bolt provided integrally with the lifter plate and penetrating the cylindrical container in and out;
A fixing nut that is screwed into a tip of the fixing bolt that protrudes to the outside of the cylindrical container and fixes the lifter plate to the cylindrical container;
The container rotating mixer according to claim 9, further comprising a seal washer sandwiched between the fixing nut and an outer peripheral surface of the cylindrical container. The container rotating mixer according to any one of claims 1 to 10,
A heat source for heating the cylindrical container from the outside;
Temperature measuring means for measuring the temperature inside the cylindrical container;
A stirring object heating comprising: a control unit that feedback-controls the temperature inside the cylindrical container by changing a heating amount from the heat source to the cylindrical container based on a measurement result of the temperature measuring unit Processing equipment.