JP2006334592A - Stirring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stirring device capable of yielding a high vacuum condition and a high purity-product. <P>SOLUTION: The stirring device is provided with a completely sealed type-motor 3, a stirring shaft 2 with a stirring blade 1 rotated and driven by the motor 3, and a vacuum container A that is connected to a flange section 14 of the motor 3, accommodates the stirring shaft 2 and is closely sealed. The vacuum container A has a connection tube 5 connected to the section 14 and a stirring container 4 connected to the tube 5 where stirring is conducted by the blade 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stirrer that stirs in a vacuum container.

As a conventional stirring device for stirring a substance in a vacuum container, it has a motor for rotating a stirring shaft with stirring blades and a container in which stirring is performed, and the stirring shaft is inserted into the container, Some seals are performed between the container and the outer peripheral surface of the stirring shaft, and the container is evacuated to perform stirring (see, for example, Patent Document 1).
That is, a bearing with a seal is provided in the container, and the outer peripheral surface of the stirring shaft that rotates by the seal is sealed.
Further, such a conventional stirring device will be described with reference to a sectional side view of FIG. 3. A bearing member 42 with a mechanical seal 41 is connected to the opening side of the stirring vessel 40, and the sealing material for the mechanical seal 41 is used as a sealing material. Tightened by the seal holder 46, the airtightness is maintained on the outer peripheral surface of the stirring shaft 44. Then, the stirring shaft 44 with the stirring blade 45 is rotated by the motor 43, and stirring is performed in the stirring container 40.
JP 2001-29764 A

  In the conventional vacuum agitator, since the mechanical seal 41 is used for the bearing member 42, when the stirring shaft 44 rotates, frictional heat is generated between the shaft 44 and the seal 41, and the seal 41 is worn (broken). The vacuum inside the stirring vessel 40 is broken from this seal part and a high vacuum cannot be expected (high vacuum cannot be maintained), and impurities such as wear powder in the seal part / bearing member and fragments of the seal 41 However, there is a problem in that it enters the stirring vessel 40 and mixes with the substance to be stirred, leading to a decrease in the purity of the product (reaction product).

  Then, this invention aims at providing the stirring apparatus which can obtain a high vacuum state and can obtain a highly purified product.

In order to achieve the above-described object, a stirring device according to the present invention includes a completely sealed motor, a stirring shaft with stirring blades driven to rotate by the motor, and the stirring shaft connected to a flange portion of the motor. And a vacuum vessel that is sealed and has a connecting tube connected to the flange portion and a stirring vessel connected to the connecting tube and stirred by the stirring blades Is.
The connecting pipe has a protruding insertion port for inserting the stirring shaft and connecting the stirring container, and an inner peripheral wall of the connecting pipe is formed in a folded shape with a reduced diameter, and is externally fitted to the stirring shaft. And a concave foreign matter receiving portion for preventing foreign matter from entering the stirring vessel. Further, the connection pipe has a drain pipe portion for discharging the foreign matter collected in the concave foreign matter receiving portion to the outside. The agitation container is connected by inserting the insertion port of the connection pipe.
Furthermore, the stirring shaft extends in a cantilevered manner from the motor without having a bearing portion in the vacuum vessel.

The present invention has the following effects by the above-described configuration.
According to the stirrer according to the present invention, a mechanical seal (sealing means) around the stirrer shaft 2 that has been conventionally required is not necessary. Accordingly, since no leakage occurs from the sealing means around the stirring shaft 2, the inside of the stirring vessel 4 can be placed in a high vacuum state, and the purity of the chemical reaction product in high vacuum can be improved.
Moreover, since the abrasion powder from the sealing means such as a mechanical seal due to the rotation of the stirring shaft 2 is not generated, a high-purity stirring product can be obtained.
The device can be made compact, simple and lightweight.

Furthermore, the connection with the stirring container 4 is facilitated, and it is not necessary to configure and attach the concave circumferential foreign object receiving portion 11 as a separate member, so that foreign substances can be collected and foreign substances can be prevented from entering the stirring container 4. .
Further, the foreign matter can be discharged to the outside of the apparatus, and the foreign matter is never mixed with the stirring substance, and a high-purity product free from impurities can be obtained.
Further, the configuration can be simplified, and the agitation container 4 can be easily attached and detached.
Moreover, since there is no bearing part in the vacuum vessel A, there is no generation | occurrence | production of the abrasion powder by a bearing part, and a highly purified stirring product can be obtained.

  Hereinafter, the present invention will be described in detail based on the illustrated embodiment.

The stirrer according to the present invention is a device that stirs a substance in a vacuum vessel, and FIG. 1 is a cross-sectional side view showing a stirrer (as a reference example) deeply related to the stirrer.
This apparatus is a completely sealed motor 3, a stirring shaft 2 with a stirring blade 1 that is rotationally driven by the motor 3, and a vacuum that is connected to the flange portion 14 of the motor 3 and contains the stirring shaft 2 and is hermetically sealed. And a container A.

  The completely enclosed motor 3 referred to in the present invention includes a motor 3 with a speed reducer section, and a motor 3 with a speed reducer connected thereto, in addition to the motor 3 composed only of the motor section. The completely sealed type is a structure in which the motor casing is sealed, and the output shaft projects from the casing while maintaining a sealed state. Alternatively, the vacuum container A is connected at the flange portion 14 so that the inside of the casing can be evacuated together with the vacuum container A.

  A flange portion (motor base) 14 formed on the output shaft side of the motor 3 is a disk member having a center hole 19 that allows the output shaft of the motor 3 to be inserted, and is sealed between the motor main body portion 3a. ing. That is, the motor (motor with a reduction gear) 3 and the flange portion 14 to which the vacuum vessel A is connected are integrally formed to form a hermetic seal, thereby avoiding the use of a mechanical seal and maintaining a high vacuum.

  The stirring shaft 2 is connected in series with the output shaft of the motor 3, and a coupling 17 is used. The stirring blade 1 is detachable at the tip of the stirring shaft 2, and has a shape corresponding to the shape of the stirring chamber 16 (stirring vessel 4) in the vacuum vessel A where the substance is actually stirred. (Blade).

As shown in FIG. 1, the vacuum container A includes a connecting pipe 5 connected to the flange portion 14 of the motor 3 and a stirring container 4 connected to the connecting pipe 5 and stirred by the stirring blade 1. The connecting tube 5 and the stirring vessel 4 may be made of glass or resin.
One end side of the connection pipe 5 is a mating end face 18 that is hermetically connected to the flange portion 14 of the motor 3. The connection pipe 5 is fastened by a clamp 20 (sanitary clamp), and the other end side is an insertion port that is connected to the stirring vessel 4. Yes.

  The stirring container 4 has a spherical shell shape having an opening portion 26 or a bottomed cylindrical bottle shape, and the opening portion 26 side is connected to the connecting pipe 5. In the connection state shown in FIG. 1, the opening of the connection pipe 5 is inserted into the opening 26 of the stirring vessel 4 to be fitted and sealed by sliding. According to this configuration, the attachment and detachment is easy. And the structure is simplified. Alternatively, although not shown in the drawing, the components may be engaged with each other or may be fastened by a clamp. The vacuum container A may be a container in which the connecting pipe 5 and the stirring container 4 are integrally connected.

Furthermore, the stirrer is a saddle member (diffusion ring) that prevents foreign matter (lubricating oil, grease, wear powder, etc.) generated by the motor 3 side or the coupling 17 from entering the stirring empty chamber 16 (stirring vessel 4). 6 and the foreign material receiving member 7 are provided at the inner position of the connecting pipe 5.
The flange member 6 is an annular disk member (disk) that is externally attached to the stirring shaft 2, and a position where the center hole 19 of the flange portion 14 is covered with a gap and a foreign matter receiving member 7 to be described later. Two pieces are disposed at a position where the leading end opening 9a of the rising peripheral wall 9 is covered with a gap.

The foreign material receiving member 7 has a substantially bottomed cylindrical shape. The stirring shaft 2 is inserted through a hole at the center of the bottom (bottom surface) of the foreign material receiving member 7 and is surrounded by the stirring shaft 2 to which the flange member 6 is attached. This prevents foreign matter from entering the stirring chamber 16 (stirring container 4) of the container A. Further, the bottom receiving tray 8 of the foreign material receiving member 7 has a rising peripheral wall portion 9 that is externally fitted with a gap in the stirring shaft 2 on its inner peripheral side, and the bottom receiving tray 8 is an oil pan portion (oil Receiving part).
The opening side of the foreign material receiving member 7 is attached by a flange portion 14 of the motor 3 and a set screw or the like, and the foreign material receiving member 7 is located with respect to the vacuum vessel A at the inner position of the vacuum vessel A for stirring. It can be said that it becomes a double pipe.

As a result, when the stirring shaft 2 rotates, the flange member 6 rotates together, and the foreign matter adhering to the stirring shaft 2 and the flange member 6 is projected by the centrifugal force and passes through the peripheral wall (cylindrical partition wall portion) of the foreign object receiving member 7 to the bottom. Foreign matter is collected in the (bottom receiving portion 8).
Further, a drain pipe portion 12 for discharging the foreign matter collected in the bottom tray portion 8 to the outside of the vacuum container A is connected to the bottom tray portion 8.

  In FIG. 1, the drain pipe portion 12 is a pipe line that extends through the flange portion 14 to the outside, and this pipe line is connected to a vacuum pump (not shown) to evacuate the vacuum vessel A. Can be made. That is, it can be said that the decompression pipe having the exhaust pipe 24 and the exhaust port 25 also serves as the drain pipe portion 12, and the foreign matter passes through the exhaust pipe 24 and is discharged from the exhaust port 25.

  FIG. 2 shows an embodiment of the stirring device of the present invention. This apparatus is a completely sealed motor 3, a stirring shaft 2 with a stirring blade 1 that is rotationally driven by the motor 3, and a vacuum that is connected to the flange portion 14 of the motor 3 and contains the stirring shaft 2 and is hermetically sealed. A container A. The vacuum container A includes a connecting pipe 5 connected to the flange portion 14 and a stirring container 4 connected to the connecting pipe 5 and stirred by the stirring blade 1 (becomes a stirring chamber 16). In addition, the motor 3, the flange part 14, and the stirring shaft 2 with the stirring blade 1 are the same as that of FIG. 1, and description is abbreviate | omitted.

  The connecting tube 5 and the stirring vessel 4 may be made of glass, resin, or the like. The connecting tube 5 is formed with a mating end face 18 whose one end portion is hermetically connected to the flange portion 14 and is clamped by a clamp 20 (sanitary clamp). Fastened. The connecting pipe 5 has a bottle shape on the outer peripheral contour, and the connecting pipe 5 has a protruding insertion port 10 for inserting the stirring shaft 2 and connecting the stirring container 4 on the other end side. ing.

  The stirring vessel 4 has a spherical shell shape having an opening 26 or a bottomed cylindrical bottle shape, and the opening 26 side is connected to the insertion portion 10 of the connection pipe 5. In the connection state shown in FIG. 2, the insertion port 10 of the connection pipe 5 is inserted into the opening 26 of the stirring vessel 4 to form a fitting shape, which is hermetically sealed. With this configuration, the stirring container 4 can be easily attached and detached, and the structure is simplified. Alternatively, although not shown in the drawing, the components may be engaged with each other or may be fastened by a clamp.

The connecting pipe 5 has a concave circumference whose inner peripheral wall 5a is reduced in diameter and formed in a folded shape on the other end side, and is fitted on the stirring shaft 2 to prevent foreign matter from entering the stirring vessel 4. It has a foreign matter receiving part 11. That is, the concave outer periphery receiving part 11 includes an outer cylinder part 22 whose outer peripheral side is a part of the connecting pipe body, and an inner cylinder that is a double pipe with the outer cylinder part 22 and is fitted over the stirring shaft 2 with a gap. Part 21, and a folded concave connection part 23 that connects (connects) the outer cylinder part 22 and the inner cylinder part 21. In the connecting pipe 5, the insertion port 10 and the inner cylinder part 21 of the concave circumferential foreign object receiving part 11 are concentric cylinders, and projecting (extending) in opposite directions.
With this configuration and the flange member 6 described later, foreign matter cannot enter from the gap between the stirring shaft 2 and the inner cylindrical portion 21, and foreign matter is collected in the concave circumferential foreign matter receiving portion 11. That is, the concave outer periphery receiving part 11 becomes an oil pan part.

Furthermore, the connecting pipe 5 has a drain pipe part 13 for discharging the foreign matter collected in the concave foreign matter receiving part 11 to the outside. More specifically, the drain pipe portion 13 is formed so as to penetrate the tube wall of the connection pipe 5 in the folded concave circumferential connecting portion 23, and the foreign matter collected in the folded concave circumferential connecting portion 23 is drained. The pipe portion 13 can be discharged to the outside of the connection pipe 5 immediately.
The drain pipe portion 13 is connected to a vacuum pump (not shown), and can evacuate the vacuum vessel A. In other words, it can be said that the pressure reducing pipe also serves as the drain pipe portion 13, and the foreign matter is discharged from the pressure reducing pipe.

Furthermore, the stirrer is a saddle member (diffusion) that reliably prevents foreign matter (lubricant oil, grease, wear powder, etc.) generated by the motor 3 side and the coupling 17 from being mixed into the stirring chamber 16 (stirring vessel 4). Ring) 6.
The flange member 6 is an annular disk member (disk) that is externally attached to the stirring shaft 2 at the inner position of the connecting pipe 5, and is a position where the center hole 19 of the flange portion 14 is covered with a gap. And a position where the tip opening 21a of the inner cylinder part 21 which is a part of the concave outer periphery receiving part 11 is covered with a gap.
As a result, when the stirring shaft 2 rotates, the flange member 6 rotates together, and the foreign matter adhering to the stirring shaft 2 and the flange member 6 is projected by the centrifugal force, and passes through the peripheral wall (connecting pipe main body) of the concave outer periphery receiving portion 11. Foreign matter is collected at the bottom (concave circumferential connecting portion 23).

  Further, in the stirring apparatus of FIGS. 1 and 2, the stirring shaft 2 for attaching the stirring blade 1 to the tip side extends in a cantilever form from the motor 3 without having a bearing portion in the vacuum vessel A. (It is suspended). That is, since the bearing member 42 with the mechanical seal 41 for holding and sealing the stirring shaft 2 does not exist in the container as in the conventional stirring device shown in FIG. 3, the wear between the stirring shaft 2 and the seal is not present. No abrasion powder is generated due to the above.

  Therefore, in the stirring device of the present invention, the motor 3 (and the speed reducer) is a completely sealed type, and the vacuum vessel A (reaction vessel) is attached to and attached to the flange portion 14 of the motor 3. That is, the motor 3 (and the speed reducer) is integrated with the vacuum vessel A, and the whole can be kept in an airtight state to maintain a high vacuum, so that no foreign matter is mixed in and a high purity product is obtained.

Also, since the motor casing is exposed to the atmosphere, it can be naturally cooled, helping to dissipate the motor 3 and increasing the cooling efficiency of the motor 3, and because the motor casing is exposed to the atmosphere, it is necessary. Sometimes a cooling device can be attached.
Furthermore, since no mechanical seal is used, the motor torque can be reduced, and the motor 3 itself generates less heat.

It is a section side view showing the stirring device of the reference example deeply related to the present invention. It is a cross-sectional side view which shows one Embodiment of the stirring apparatus of this invention. It is a cross-sectional side view of the conventional stirring apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirring blade 2 Stirring shaft 3 Motor 4 Stirring vessel 5 Connection pipe 5a Inner peripheral wall 6 Gutter member 7 Foreign material receiving member 8 Bottom receiving tray 9 Standing peripheral wall
10 Slot
11 Concave foreign material receiver
12 Drain pipe section
13 Drain pipe section
14 Flange
16 Stirring chamber A Vacuum container

Claims (5)

  It is connected to a completely sealed motor (3), a stirring shaft (2) with a stirring blade (1) that is rotationally driven by the motor (3), and a flange portion (14) of the motor (3). A vacuum vessel (A) that accommodates the shaft (2) and is in a hermetically sealed state. The vacuum vessel (A) includes a connection pipe (5) connected to the flange portion (14), and a connection pipe ( And a stirring vessel (4) connected to 5) and stirred by the stirring blade (1).   The connecting pipe (5) has a protruding insertion port (10) for inserting the stirring shaft (2) and connecting the stirring vessel (4), and an inner peripheral wall (5a) of the connecting pipe (5). And a concave foreign-matter receiving portion (11) that is formed in a folded shape with a reduced diameter and is fitted on the stirring shaft (2) to prevent foreign matter from entering the stirring vessel (4). The stirring device according to 1.   The stirrer according to claim 2, wherein the connecting pipe (5) has a drain pipe part (13) for discharging the foreign matter collected in the concave peripheral foreign matter receiving part (11) to the outside.   The said stirring container (4) is a stirring apparatus of Claim 2 or 3 with which the said insertion part (10) of the said connection pipe (5) was inserted and connected.   The stirring device according to claim 1, 2, 3 or 4, wherein the stirring shaft (2) extends in a cantilevered manner from the motor (3) without having a bearing portion in the vacuum vessel (A). .

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