EP0210651A2

EP0210651A2 - Treating device for agitating and the like

Info

Publication number: EP0210651A2
Application number: EP86110478A
Authority: EP
Inventors: Mitsuo Kamiwano; Yoshitaka Inoue
Original assignee: Inoue Mfg Inc; Inoue Seisakusho Co Ltd
Current assignee: Inoue Mfg Inc; Inoue Seisakusho Co Ltd
Priority date: 1985-08-02
Filing date: 1986-07-29
Publication date: 1987-02-04
Anticipated expiration: 2006-07-29
Also published as: EP0210651B1; EP0210651A3; DE3681846D1

Abstract

A rotary body (12) located within a treating tank (1) is electro-magnetically rotated, and by means of a rotary body, such treatments, as mixing, stirring, agitating, kneading, dispersion and the like will be effected. The rotary body is made of conducting material and an electro-magnetic coil (10) which generates a revolving magnetic field is located adjacent the rotary body. Since the rotary body is separated from a driving source, the treating tank provided with the rotary body can be made sealable.

Description

Background of the invention:

1. Field of the invention:

This invention relates to a treating device for stirring treatments, such as mixing, stirring, agitating, kneading, dispersion and the like, in particular a rotary body for stirring treatment is electro-magnetically driven within the device.

2. Description of the related art:

In usual agitating devices, there are provided with various driving systems, such as motor, pulley, reduction gear, coupling and the like outside of a treating tank to transmit a rotation to a stirring shaft extending to the inside of the tank, and stirring blades within the tank are rotated by means of the stirring shaft. In this way, since the motor is separately provided, mechanical loss and other troubles were caused in the way from the driving source to the stirring blades. In addition, when the treating tank is made tight, various problems were caused in the point of sealing of the stirring shaft.
Further, there is known such a device, in which the permanent magnets are attached to the stirring blades, and opposing to the permanent magnet, other permanent magnets are provided outside of the treating tank, thus the permanent magnet on the outside is rotated by a motor.
According to this device, an inside permanent magnet and an outside permanent magnet are magnetically connected, so that the stirring blades are rotated via the inside permanent magnet when the outside permanent magnet is rotated by the motor. However, in this device, the motor must be prepared separately.

Summary of the invention:

An object of this invention is to provide a treating device for agitating treatments and the like, in which no motor is provided separately, the stirring shaft extending from outside to inside of the tank is eliminated, and the stirring blades are directly and electro-magnetically rotated.
According to this invention, a rotary body having a stirring blade is made of conducting material and is rotatably supported within the treating tank. Adjacent the rotary body, an electro-magnetic coil which generates a revolving magnetic field is located, and by the electro magnetic inductive action of the revolving magnetic field, the rotary body is rotated to effect stirring treatment. The relation between the rotary body and the electro-magnetic coil includes the case where the rotary body is located to surround the electro-magnetic coil and the case where the electro-magnetic coil is located to surround the rotary body.
The device according to this invention can be applied to the stirring treatments for mixing, stirring, agitating, kneading, blending, dispersion, medium dispersion and the like. Following description is directed to a case of stirring treatment as an example, where the material to be treated is received in a stirring tank.
Other objects and features of this invention will become apparent from the following description with reference to the accompanying drawings.

Brief description of the drawings:

Fig. 1 is a vertical sectional view of a device according to this invention, wherein a rotary body is located outside of an electro-magnetic coil.
Fig. 2 is a vertical sectional view of other embodiment of this invention, having a sleeve-shaped rotary body.
Fig. 3 is a vertical sectional view of other embodiment of this invention, wherein a stirring blade is hung down.
Fig. 4 is a vertical sectional view of other embodiment of this invention, wherein a stirring tank is laterally set up.
Fig. 5 is a vertical sectional view of other embodiment, wherein a rotary body is located inside of an electro-magnetic coil.
Fig. 6 is a vertical sectional view of other embodiment of this invention, wherein a rotary body is located without providing a wall member between the rotary body and the electro-magnetic coil.
Fig. 7 is a vertical sectional view of other embodiment of this invention, wherein a rotary body is provided above the tank.

Description of the preferred embodiment:

In Fig. 1, a tank (1) has a canopy plate (2) on its top, in a hole (3) of the plate, a flange (5) of a cover plate (4) is inserted and secured by bolts (not shown), and a bearing (6) is attached to the flange. A supporting member (7) is attached to the cover plate (4) by bolts (not shown) to seal the tank. The supporting member is provided with a closed cylindrical wall member (8) extending within the tank, and by means of the wall member, an isolated space (9) is formed within the tank. Within the space, an electro-magnetic coil (10) which generates a revolving magnetic field is provided, preferably a cooling pipe (11) is provided inside of the coil and the cooling pipe is passed with such a cooling medium as water, air and the like, to absorb the generated heat of the coil. In the drawing, the electro-magnetic coil (10) is shown as one set; however, plural sets may be provided if desired. On the outside of the wall member (8), a rotary body (12) is provided so as to be driven by an electro-magnetic induction due to the revolving magnetic field. The rotary body shown in Fig. 1 is a cylindrical body having a bottom (13) surrounding the outer periphery of the wall member, and it may be an annular body (not shown) loosely put on the wall member. And, in case of the annular body, it is suported by suitable means at a position corresponding to the outside of the electro-magnetic coil. The whole portion of the rotary body or at least a portion corresponding to the electro-magnetic coil is formed of the conducting material such as iron, silicon steel plate, amorphous metal and the like, so as to be rotated by the electro-magnetic inductive action, as mentioned above. The rotary body (12) is supported on its upper portion by a sliding bearing of Teflon ®, roller bearing, magnetic bearing and other suitable bearing (6), and an axis (14) provided on the inside of the bottom (13) is supported by a bearing (16) attached to a bottom (15) of the wall member (8). To the cylindrical body or the annular body (12), a stirring blade (17) is fitted, and the stirring blade may be provided in plural.
On the outside of the tank (1), a jacket (18) is provided, in which a temperature controlled medium such as water is circulated to be able to control the temperature of the material to be treated.
When the material to be treated with stirring is received in the tank through an inlet (not shown) and the electro-magnet (10) is energized, a revolving magnetic field is generated. By the revolving magnetic field, the rotary body (12) will begin to rotate, thus, enabling the stirring treatment. After treatment, the material may be taken out from an exit (not shown). In the device according to this invention, two or more rotary bodies may be provided within the tank.
Fig. 2 shows other embodiment of this invention, quite alike the device of Fig. 1. In the device of Fig. 1, the rotary body (12) is a cylindrical body having a bottom, while in Fig. 2, the rotary body is a sleeve-shaped rotary body (19), whose bearing (20) is a magnetic bearing. Others are similar constructions to the device of Fig. 1.
Fig. 3 shows other embodiment of this invention. A tank (21) has a canopy plate (22) on its top and a flange (23) provided on the canopy plate has a bearing (24), on which a flange (26) provided on the upper portion of a rotary body (25) is hung, thereby the rotary body is rotatably fitted. On the canopy plate, a supporting member (27) is attached, and on that member a cylindrical wall member (28) is provided. In a space (29) inside of the wall member, an electro-magnetic coil (30) which generates the revolving magnetic field is provided. The rotary body (25) is made of the conducting material, and an axis (32) provided on a bottom (31) is supported by a bearing (34) provided on a bottom (33) of the wall member (28). On the outside of the bottom (31) of the rotary body an attaching portion (37) for attaching a shaft (36) of a stirring blade (35) is provided. A cooling pipe (38) for cooling the electro-magnetic coil and a jacket (39) to be provided on the outer periphery of the tank are provided in the same manner as the device of Fig. 1. An exit (40) provided on the bottom of the tank can be opened and closed by a valve (not shown).
In the same manner as the device of Fig. 1, the rotary body (25) is rotated by energizing the electro-magnetic coil (30), thereby the stirring blade (35) is rotated to enable stirring treatment. In this embodiment, when various stirring blades are prepared corresponding to the material to be treated and the objects of treatment, the device may be used by simply changing the stirring blades.
An embodiment shown in Fig. 4 is a device for continuous treatment. A tank (41) is laterally disposed and a cover plate (43) and a supporting member (44) are attached to the side of an end plate (42). The supporting member (44) is provided with a cylindrical wall member (45) in the lateral direction, and within the wall member, an electro-magnetic coil (46) which generates a revolving magnetic field. A rotary body (47) is located surrounding the outer periphery of the wall member; a flange (48) provided on its one end is supported by a bearing (49) provided on a cover plate (42); an axis (50) provided on the other end is supported by a bearing (51) on the wall member (45). Then the rotary body is rotatably supported. On the periphery of the rotary body (47), plural stirring blades (52) are provided. And, the electro-magnetic coil (46) has a length corresponding to the portion of the rotary body provided with the stirring blades; however, plurarl electro-magnetic coils maybe provided corresponding to the portion of each stirring blade. On the periphery of the tank (41), a jacket (53) is provided and inside of the electro-magnetic coil (46), a cooling pipe (54) is provided for cooling.
When the electro-magnetic coil (46) is energized, the rotary body and the stirring blades (52) are rotated. The material to be treated entered from an inlet (55) is treated by the stirring blades (52) and can be continuously taken out from an exit (56). If a screen (57) is provided within the tank, and the media are put in, the device may also be used as a continuous media dispersion machine and a wet crusher.
Fig. 5 shows an embodiment of this invention, wherein a rotary body is located inside of an electro-magnetic coil.
In Fig. 5, a tank (58) has a canopy plate (59) on its top, and a cover plate (60) is attached onto the canopy plate. To the cover plate (60), a supporting member (61) is attached, and an upper portion of a rotary shaft (64) having a stirring blade (62) and a rotary member (63) is rotatably attached to the supporting member. In the drawing, the rotary shaft (64) is provided with a flange (65), which is supported by the magnetic bearing (66) in a floating manner, and the bearing portion is covered by a top plate (67). On the rotary shaft, a rotary body (63) made of conducting material is provided, and a wall member (69) is provided on the supporting member (61) so as to form a receiving portion (68) around the rotary body. In the receiving portion, an electro-magnetic coil (70) which generates a revolving magnetic field is provided. The rotary body and electro-magenetic coil may be provided in plural and in parallel. On the back of the cover plate (60), a jacket (71) through which a cooling media such as water, air and the like will pass so as to absorb generated heat of the electro-magnetic coil (70), is provided. However, the jacket may be provided on the receiving portion adjacent the electro-magnetic coil. And, on the outside of the tank (58), a jacket (72) is provided, in which a temperature controlled media such as water are passed through to control the temperature of the material to be treated.
When the material to be treated by stirring is received in a tank through the inlet (not shown) and the electro-magnetic coil (70) is energized, a revolving magnetic field is generated, and by the magnetic field the rotary body (63) is rotated, thereby the stirring blade (62) is rotated to enable the stirring treatment. After treatment, the material may be taken out from the exit (not shown).
In the embodiment, the tank is a vertical type, but it may be a horizontal type, and the material may be continuously treated.
In the above mentioned embodiment, a wall member is provided between the electro-magnetic coil and a rotary body; however, the wall member may be dispensed with. And, Fig. 6 and Fig. 7 show such embodiments of this invention.
In Fig. 6, a canopy plate (74) provided on a tank (73) has a cylindrical portion (75) near its center, and in that portion a supporting cylinder (76) is fitted. The upper portion of the supporting cylinder is closed by a cover plate (77). Within the supporting cylinder, a rotary body (78) is provided, whose upper part is closed by the cover plate, and a flange (79) formed on the upper edge and a middle portion of the rotary body are supported by a sliding bearing of Teflon ®, roller bearing, magnetic bearing, and other suitable bearings (80), (81).
Within the rotary body, an electro-magnetic coil (83) which generates the revolving magnetic field adjacent a cylindrical wall (82), is located and in the drawing, a set of the electro-magnetic coil is attached to a supporting rod (84), but in case of need, plural sets may be provided. Inside of the coil, a cooling pipe (85) is provided to circulate the cooling medium so as to absorb the generated heat of the coil. And, the whole portion of the rotary body or at least a portion corresponding to the electro-magnetic coil is formed of suitable conducting material similar to the above mentioned embodiment. The rotary body may be directly connected with the stirring blade, but in the drawing, a shaft (86) is fitted to the lower part, and on that shaft, a stirring blade (87) is provided. Further, plural numbers of stirring blade shafts and of rotary body shafts may be provided.
On the outside of the tank (73), a jacket (88) is provided.
The material to be treated is received within the tank from an inlet (not shown) provided in the suitable position of the tank, then the electro-magnetic coil (83)is energized, so that the revolving magnetic field is generated, the rotary body (78) will rotate and the stirring blade (87) is rotated, enabling the stirring treatment. And, the outlet (89) is closed by a valve (not shown).
In Fig. 7, an embodiment is shown,in which a rotary body is sealed on the upper part of a canopy plate. In the drawing, a supporting cylinder (92) is fixed on a canopy plate (90) so that the lower face of the cylinder engages with a recessed part (91) formed on the canopy plate (90). Within the supporting cylinder, a rotary body (93) is provided, whose body is rotatably supported, at a flange (94) provided on its upper part and a shaft portion (95) provided at its lower part, by bearings (96), (97). Adjacent a cylinder wall (98) of the rotary body, an electro-magnetic coil (99) is provided, whose coil is supported by a supporting rod (100). Inside of the electro-magnetic coil, a cooling pipe (101) is provided. The upper surface of the supporting cylinder is covered by a covering plate (102) to seal the supporting cylinder. Other construction is similar to that of the embodiment of Fig. 6. In this embodiment, the rotary body and the like are independent of the tank, so that these may be suitably and simply attached to other tanks for use.
Since this invention is formed as mentioned above and the rotary body for stirring treatment of the material to be treated is driven by the revolving magnetic field, usual mechanical loss are never caused, and also problems of the shaft sealing do not arise. Therefore the inventive device may be suitably used for sealable treating tank, reaction tank, etc.

Claims

1. A treating device for stirring treatment, such as mixing, stirring, agitating, kneading, dispersion of the materials to be treated which are received within a treating tank, comprising:
an electro-magnetic coil which generates a revolving magnetic field;
a rotary body made of conducting material,said body being rotatably provided within said treating tank and being to be rotated by an electro-magnetic inductive action of said revolving magnetic field; and
a sritting blade provided on said rotary body.

2. A treating device according to claim 1, wherein said rotary body is located surrounding an outer periphery of said electro-magnetic coil.

3. A treating device according to claim 1, wherein said rotary body is surrounded by said electro-magnetic coil.

4. A treating device according to claim 1, wherein said rotary body is cylindrically provided.

5. A treating device according to claim 1, wherein said rotary body is annularly provided.

6. A treating device according to claim 1, wherein said electro-magnetic coil is provided within a wall member, outside of which said rotary body is located.

7. A treating device according to claim 1, wherein said electro-magnetic coil is provided within said wall member, inside of which said rotary body is located.

8. A treating device according to claim 1, wherein said treating tank and said rotary body are laterally provided so that the material to be treated is continuously treated.

9. A treating device according to claim 1, wherein the generated heat of said electro-magentic coil is absorbed by the cooling medium passing inside of said coil, and the temperature of treating material within said tank is controlled by the temperature controlled medium passing outside of said tank.