JP4926475B2 - Stirrer - Google Patents

Description

  The present invention relates to a stirring device that stirs wet raw materials such as pellets and powders.

Conventionally, as an agitation device for agitating an object to be agitated such as a pellet or powder, an agitation provided with a hollow fixed body provided with side walls at both ends and a rotating shaft rotatably inserted into the fixed body An apparatus has been proposed (see, for example, Patent Document 1). Here, the rotating shaft is provided with a plurality of stirring blades spaced apart in the axial direction and the circumferential direction, and the rotating shaft is rotated to stir the object to be stirred supplied to the inside of the fixed body by the stirring blade. .
Depending on the stickiness of the object to be stirred supplied to the inside of the fixed body, the object to be stirred adheres to the stirring blade or the inner peripheral surface of the fixed body during the stirring process, and the object to be stirred by the stirring blade is attached by the adhered object to be stirred. Stirring may be hindered. In this stirrer, a cylindrical idler bar is provided in the fixed body so as to be parallel to the axis of the rotary shaft, and the idler bar is fixed to the fixed body according to the rotation of the rotary shaft. It moves along the inner peripheral surface, or moves in the radial direction of the rotating shaft along the stirring blade. Thereby, the to-be-stirred thing adhering to the stirring blade or the inner peripheral surface of the fixed body is scraped off, and the stirring efficiency of the to-be-stirred object can be maintained.
JP 7-239180 A

  However, the following problems remain in the conventional stirring device. That is, in the above-described conventional stirring device, it is conceivable to increase the processing amount of the object to be stirred in one stirring process by enlarging the fixed body, but the floating rod also increases in size as the fixed body increases in size. As a result, its weight increases. For this reason, when the stirring blade pushes up the floating rod along the inner peripheral surface of the fixed body by rotating the rotating shaft, the floating rod presses against the inner peripheral surface of the fixed body and rubs against it, thereby causing twisting, vibration, and abnormal noise. There is a problem that occurs.

  The present invention has been made in view of the above-described problem, and suppresses rubbing of the floating rod while pressing the inner peripheral surface of the fixed body when the floating rod is pushed up along the inner peripheral surface of the fixed body by the rotating shaft. Thus, an object of the present invention is to provide a stirring device that reduces vibration and abnormal noise.

The present invention employs the following configuration in order to solve the above problems. That is, the stirring device of the present invention includes a fixed body having a cylindrical body with side walls provided at both ends, and a plurality of stirring blades provided at intervals in the axial direction and the circumferential direction. In a stirrer that includes a rotating shaft that is rotatably inserted and a columnar floating rod that is freely inserted into the cylindrical body, and stirs the material to be stirred supplied to the cylindrical body while drying . , When the rotating shaft rotates at least two of the plurality of stirring blades, the floating rod is in front of the rotating shaft and is in contact with the inner peripheral surface of the cylindrical body. The shaft core is provided with a collar portion that feeds out such that a force directed radially inward of the rotary shaft is generated.

According to this invention, by providing the collar portion on the stirring blade, it is possible to suppress the idle rod from rubbing the inner peripheral surface of the cylindrical body when the rotating shaft is rotated. That is, when the rotating shaft is rotated, a part of the plurality of stirring blades shifts from a vertically downward state to a horizontal state. At this time, the floating rod in contact with the inner peripheral surface of the cylindrical body is pushed up along the inner peripheral surface of the cylindrical body by the stirring blade. The flange provided on the stirring blade is fed so that a force directed radially inward of the rotating shaft is generated at the axis of the floating rod, and the floating rod is fed while pressing the inner peripheral surface of the cylindrical body. To avoid. Thereby, it is suppressed that the floating rod rubs while pressing the inner peripheral surface of the cylindrical body, and the occurrence of sag and stagnation on the inner peripheral surface of the cylindrical body is avoided.
Therefore, when the floating rod is pushed up along the inner peripheral surface of the cylindrical body, generation of vibrations and abnormal noise is reduced, and the life of the stirring device can be extended.
Moreover, even if the floating rod is bent, for example, it is possible to reduce the occurrence of vibration and abnormal noise similar to those described above.

Further, in the stirring device of the present invention, the contact portion between the flange portion and the floating rod that is in contact with the inner peripheral surface of the cylindrical body is radially outside the rotating shaft from the axial center of the floating rod. It is preferable to be located at an equal distance in the radial direction or the radial direction.
According to the present invention, since the collar portion contacts the idler rod at a position radially outward or equidistant from the axial center of the idler rod, when the rotary shaft is rotated, the collar portion is idle. The rod is fed so that a force directed inward in the radial direction of the rotating shaft is generated on the shaft core.

  According to the stirrer according to the present invention, the floating rod that is in contact with the inner peripheral surface of the cylindrical body is sent out in the rotational direction forward or radially inward of the rotational shaft from the rotational direction forward. Suppresses rubbing while pressing the inner peripheral surface of the cylindrical body. Therefore, the occurrence of sag and stagnation is avoided, the generation of vibration and abnormal noise is reduced, and the life of the stirring device can be extended.

Hereinafter, an embodiment of a stirring device according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the stirring device 1 according to the present embodiment is disposed inside a fixed body 2, a hollow fixed body 2, a rotating shaft 3 that is rotatably inserted into the fixed body 2, and a fixed body 2. And a floating rod 4.

As shown in FIGS. 1 to 3, the fixed body 2 is placed horizontally on the base 11 and has a cylindrical body 14 provided with side wall portions 12 and 13 at both ends, and covers the outer periphery of the cylindrical body 14. And a jacket (not shown). 2 and 3, the symbol S indicates the object to be stirred supplied into the cylindrical body 14.
The cylindrical body 14 has a cylindrical cross-section, and is provided with a stirring object inlet 14A for supplying a stirring object at the upper part of one end, and is stirred and dried at the bottom of the substantially central part of the cylindrical body 14. An agitated object discharge port 14B for discharging the agitated material is provided. In addition, a bag filter 15 connected to a vacuum device (not shown) is provided at the upper part of the center of the cylindrical body 14.

As shown in FIGS. 1 to 4, the rotating shaft 3 includes a rotating shaft main body 21 and a plurality of stirring blades 22 provided in the axial direction and the circumferential direction of the rotating shaft 3. A power source (not shown) provided externally is selectively rotatable in the direction of arrow A or the direction B opposite to the direction A.
The rotating shaft main body 21 has a cylindrical shape, and a flow path into which steam as a heat medium can be introduced is formed.

  As shown in FIGS. 4 and 5, the plurality of stirring blades 22 is a circumferential surface of the rotating shaft main body 21, and on the intersection of the spiral locus and the linear locus on the circumferential surface of the rotating shaft main body 21. The rotary shaft main body 21 is provided with an interval in the axial direction and the circumferential direction. The spiral trajectory corresponds to the direction of the arrow A shown in FIG. 4 or FIG. 5 from both ends of the rotating shaft main body 21 toward the substantially center of the rotating shaft main body 21, which is a part corresponding to the stirring object discharge port 14B. It is arranged to be. Further, the linear trajectories are arranged so as to be equidistant in the circumferential direction at four locations on the peripheral surface of the rotary shaft main body 21 in parallel with the axis of the rotary shaft main body 21. As shown in FIGS. 2 and 3, the axis of the rotating shaft is between the stirring blade 22 disposed on the linear locus and the stirring blade 22 disposed on the other adjacent linear locus. A cylindrical floating rod 4 that is parallel to the axis of the main body 21 is provided.

As shown in FIGS. 6 and 7, the stirring blade 22 has a plate shape formed so as to gradually become thinner from the proximal end connected to the rotary shaft main body 21 toward the radially outer tip of the rotary shaft main body 21. The member has a trapezoidal cross section. Then, when the rotating shaft 3 rotates in the direction of arrow A, the stirring blade 22 is configured so that the radially outer end 22b of the rotating shaft 3 on the surface 22a forward in the rotating direction is perpendicular to the rotating direction. Is formed. In addition, on the outer side 22d in the radial direction of the rotation shaft 3 on the surface 22c on the rear side in the rotation direction of the stirring blade 22, one side close to the center of the rotation shaft main body 21 is positioned forward in the rotation direction with respect to the other side. The rear surface 22c in the rotation direction is inclined so as to face the center of the rotation shaft main body 21.
Further, the stirring blade 22 is hollow and is connected to the flow path of the rotating shaft main body 21. Thereby, the vapor | steam which distribute | circulates the inside of the rotating shaft main body 21 will distribute | circulate also in the stirring blade 22, and the stirring blade 22 is heated. Further, a flange member 23 is provided at the tip of at least one stirring blade 22 among the plurality of stirring blades 22 provided on the same linear locus.

The flange member 23 is a plate-like member and is provided on any one of the side surfaces of the stirring blade 22 in the axial direction of the rotating shaft 3. Further, the flange member 23 has a trapezoidal shape formed so that the width thereof gradually decreases from the tip, which is one end on the radially outer side of the rotary shaft 3, toward the radially inner side. As shown in FIG. 6, the flange member 23 is connected to the floating rod 4 that is in contact with the inner peripheral surface of the cylindrical body 14 and the contact P <b> 1 or the contact P <b> 2, respectively, as the rotary shaft 3 rotates in the A direction or B direction. Contact with.
The flange member 23 is configured such that the distance between the contact P1 or the contact P2 and the axis O of the rotary shaft main body 21 is longer than the distance between the axis of the idler bar 4 and the axis O of the rotary shaft main body 21. It is configured. As a result, when the rotary shaft 3 rotates in the direction of arrow A or B, the flange member 23 causes the idler rod 4 not to be directed radially outward of the rotary shaft 3 rather than in the rotational direction. The floating rod 4 is fed out so as to generate a force inwardly in the radial direction of the rotary shaft 3.

Next, the stirring method of the to-be-stirred object using the stirring apparatus 1 which has such a structure is demonstrated. First, steam as a heat medium is introduced into the rotary shaft main body 21. Thereby, the some stirring blade 22 is heated with the vapor | steam which distribute | circulates an inside. Moreover, the cylindrical body 14 is heated by introducing steam into the jacket as a heat medium. Further, the inside of the cylindrical body 14 is evacuated by a vacuum device connected to the bag filter 15. Then, the rotating shaft 3 is rotated in the arrow A direction.
And a to-be-stirred thing is supplied from to-be-stirred thing introduction port 14A. The supplied to-be-stirred object is placed on the inner peripheral surface on the lower side of the cylindrical body 14, and is stirred by the rotation of the rotating shaft 3. Further, the stirring object is dried because the stirring blade 22 is heated by the steam flowing through the inside. At this time, in the course of stirring and drying the object to be stirred, the object to be stirred may adhere to the stirring blade 22 or the inner peripheral surface of the cylindrical body 14 depending on the adhesiveness of the object to be stirred.

First, when the stirring blade 22 shifts from the vertically downward state to the horizontal state, the floating rod 4 is pushed up along the inner peripheral surface of the cylindrical body 14 while being supported by the stirring blade 22. At this time, the floating rod 4 drops the object to be stirred attached to the inner peripheral surface of the cylindrical body 14 while moving.
Here, although the stirring blade 22 pushes up the floating rod 4 along the inner peripheral surface of the cylindrical body 14, as shown in FIG. 6, the eaves member 23 and the floating rod 4 come into contact with each other at the contact P1. As described above, the flange member 23 is formed such that the distance between the contact point P1 and the axis O of the rotary shaft main body 21 is longer than the distance between the axis of the idler bar 4 and the axis O of the rotary shaft main body 21. ing. As a result, when the rotary shaft 3 rotates, the flange member 23 is sent out in such a manner that a force directed inward in the radial direction of the rotary shaft 3 is generated in the axial center of the floating rod 4. In other words, it is possible to avoid pressing the idler bar 4 toward the inner peripheral surface of the cylindrical body 14 during rotation by the flange member 23.

Next, when the stirring blade 22 shifts from the horizontal state to the vertically upward state, the idler rod 4 moves along the surface 22a of the stirring blade 22 in the rotational direction forward from the radially outer side of the rotating shaft 3 to the axis of the rotating shaft 3. Move toward the core. At this time, the floating rod 4 drops the object to be stirred attached to the front surface 22a in the rotational direction of the stirring blade 22 while moving.
Thereafter, when the stirring blade 22 shifts from the vertically upward state to the horizontal state, the idler bar 4 rotates from the axis of the rotating shaft 3 along the surface 22c in the rotational direction rearward of the stirring blade 22 disposed in the forward direction of the rotational direction. It moves toward the outside in the radial direction of the shaft 3 and comes into contact with the inner peripheral surface of the cylindrical body 14. At this time, the floating rod 4 drops the object to be stirred attached to the surface 22c on the rear side in the rotation direction of the stirring blade 22 while moving.

Subsequently, when the stirring blade 22 shifts from the horizontal state to the vertically downward state, the floating rod 4 moves downward along the inner peripheral surface of the cylindrical body 14 while being supported by the stirring blade 22. At this time, the floating rod 4 drops the object to be stirred attached to the inner peripheral surface of the cylindrical body 14 while moving.
When the stirring blade 22 shifts from the vertically downward state to the horizontal state, the floating rod 4 is left at the bottom of the inner peripheral surface of the cylindrical body 14, but as described above, the stirring blade is located at the rear in the rotational direction. 22 is pushed up along the inner peripheral surface of the cylindrical body 14. As described above, the floating rod 4 drops the object to be stirred attached to the stirring blade 22 or the inner peripheral surface of the cylindrical body 14 while moving. Thereby, the stirring efficiency of the material to be stirred by the stirring blade 22 can be maintained.

  Here, the stirring blade 22, the rotary shaft main body 21, and the cylindrical body 14 are heated by a heat medium, and the stirring target is placed on the inner peripheral surface of the stirring blade 22, the rotary shaft main body 21, and the cylindrical body 14 during the stirring process. Is dried by contact. At this time, since the inside of the cylindrical body 14 is heated in a vacuum state, the object to be stirred can be satisfactorily dried even if the heating temperature is lowered. Will not be damaged. In addition, although the vacuum apparatus is connected to the bag filter 15 and the inside of the cylindrical body 14 is heated in a vacuum state, it may be heated in a normal pressure state.

After performing the stirring process of the object to be stirred by rotating the rotating shaft 3 in the direction of arrow A, the discharging process of rotating the rotating shaft 3 in the direction of arrow B and discharging the object to be stirred from the stirred object discharge port 14B. I do.
Since the front surface 22c in the rotation direction of the stirring blade 22 in the direction of arrow B is formed to be inclined toward the center of the rotation shaft main body 21, when the rotation shaft 3 is rotated in the direction of arrow B, the stirring blade 22 is Then, the object to be stirred is pushed out toward the center of the cylindrical body 14. Thereby, the to-be-stirred object is quickly discharged | emitted from the to-be-stirred object discharge port 14B. Here, the flange member 23 is formed such that the distance between the contact P2 and the axis O of the rotary shaft main body 21 is longer than the distance between the axis of the idler bar 4 and the axis O of the rotary shaft main body 21. Therefore, similarly to the above, the floating rod 4 is not pressed toward the inner peripheral surface of the cylindrical body 14 during rotation.

  According to the stirring device 1 configured as described above, the stirring blade 22 contacts the floating rod 4 on the outer side in the radial direction of the rotating shaft 3 rather than the axial center of the floating rod 4, and the floating rod 4 is moved from the front in the rotational direction. Is not directed outward in the radial direction of the rotating shaft 3 but sent out inward in the radial direction of the rotating shaft 3 from the front in the rotational direction. Prevents rubbing in a pressed state. This avoids the occurrence of sag and stagnation between the floating rod 4 and the inner peripheral surface of the cylindrical body 14, reduces the occurrence of vibration and abnormal noise, and extends the life of the stirring device 1. Can do. Moreover, even if the floating rod 4 is bent, for example, the generation of vibrations and abnormal noise similar to those described above can be reduced.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, in the above embodiment, steam is used as the heat medium, but other heat medium such as hot water may be used. Moreover, although the cylindrical body 14, the rotating shaft main body 21, and the stirring blade 22 are heated with a heat medium, it is good also as a structure which does not have a heating means.
Moreover, although the rotating shaft 3 is rotatable in two directions of the arrow A direction and the B direction, the rotating shaft 3 may be configured to be rotatable only in the arrow A direction.

Further, the flange member 23 is configured such that the distance between the contact point of the flange member 23 and the floating rod 4 and the axis of the rotary shaft body 21 is larger than the distance between the axis of the floating rod 4 and the axis of the rotary shaft body 21. However, it may be equidistant. Even if it does in this way, since the floating rod 4 is not sent out so that the inner peripheral surface of the cylindrical body 14 may be pressed by the eaves member 23, vibration or vibration is generated between the floating rod 4 and the inner peripheral surface of the cylindrical body 14. Generation of abnormal noise is reduced.
Moreover, although the gutter member 23 is provided on only one of both side surfaces in the axial direction of the rotating shaft 3 of the stirring blade 22, it may be provided on both surfaces.
Further, the scissors member 23 may be provided on at least one of the plurality of stirring blades 22 provided on the same locus among the four linear trajectories described above. The member 23 may be provided.
Further, although the flange member 23 is in contact with the floating rod 4 only at one location, the flange member 23 causes the axial center of the floating rod 4 to generate a force inward in the radial direction of the rotary shaft 3. It may be a configuration that can be pushed up, and may be contacted at three or more locations, or may be surface contact. Here, when the flange member 23 and the floating rod 4 are in contact with each other at two or more locations, the distance between one of the contacts and the axis of the rotating shaft main body 21 is the axis of the floating rod 4 and the axis of the rotating shaft main body 21. Even when the distance to the core is smaller, the hook member 23 as a whole pushes up the floating rod 4 so that a force directed radially inward of the rotary shaft 3 is generated on the shaft core of the floating rod 4. If it is. The same applies to the case where the flange member 23 and the floating rod 4 are in surface contact.

Moreover, although the scissors member 23 is attached to one end of the stirring blade 22 in the radial direction, the stirring blade 22 and the scissors member 23 may be integrally formed. And it is good also as a structure which pushes up so that the floating rod 4 may be beaten by enlarging the thickness in the front-end | tip of the stirring blade 22 and forming a collar part.
Moreover, the installation position of the stirring blade 22 with respect to the rotating shaft main body 21 may be changed as appropriate according to the design. For example, the axial interval of the rotating shaft main body 21 may be increased or decreased. The circumferential interval may be increased or decreased.
Further, the stirring blade 22 is formed so as to become gradually thinner from the proximal end toward the distal end, but may be formed so as to have the same thickness from the proximal end to the distal end.

  According to this invention, with respect to the stirring device, the idle rod suppresses rubbing while pressing the inner peripheral surface of the cylindrical body to reduce vibration and noise, and industrial applicability is recognized.

It is a top view which shows the stirring apparatus in one Embodiment of this invention. It is sectional drawing which shows the cylindrical body of FIG. It is sectional drawing of the cylindrical body which shows the state which rotated the rotating shaft of FIG. It is a top view which shows the rotating shaft of FIG. It is an expanded view which shows the arrangement | positioning state of the stirring blade of the rotating shaft of FIG. It is the elements on larger scale which show the stirring blade and the gutter member of FIG. It is a bottom view which shows the stirring blade and the gutter member of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirring apparatus 2 Fixed body 3 Rotating shaft 4 Free rod 12, 13 Side wall 14 Cylindrical body 22 Stirring blade 23 Claw member
S Stirred object

Claims (2)

A fixed body having a cylindrical body with side walls provided at both ends, and a rotating shaft rotatably inserted into the fixed body having a plurality of stirring blades provided at intervals in the axial direction and the circumferential direction; A stirrer provided with a cylindrical floating rod inserted freely in the cylindrical body, and stirring the object to be stirred supplied to the cylindrical body while drying ,
When at least two of the plurality of stirring blades rotate the rotation shaft, the floating rod is forward of the rotation direction and is in contact with the inner peripheral surface of the cylindrical body. A stirrer characterized by comprising a collar portion that feeds the shaft core so that a force directed radially inward of the rotary shaft is generated.   The contact portion of the collar portion with the floating rod that is in contact with the inner peripheral surface of the cylindrical body is located at a radially outward or radial distance of the rotating shaft from the axial center of the floating rod. The stirrer according to claim 1.

Images