JP2004276009A - Stirring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stirring device which can obtain a high vacuum state and can yield a product of high purity as well. <P>SOLUTION: This stirring device is equipped with a perfect seal type motor 3, a stirring shaft 2 which is connected with stirring blades 1 to be rotationally driven by the motor 3 and a vacuum vessel A which is connected to a flange section 14 of the motor 3, houses the stirring shaft 2 therein and is put into a hermetic state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stirrer for stirring in a container in a vacuum state.
[0002]
[Prior art]
As a conventional stirring device that stirs a substance in a container in a vacuum state, a motor that rotates a stirring shaft with stirring blades and a container in which stirring is performed, and the stirring shaft is inserted into the container, There is a method in which a seal is performed between a container and an outer peripheral surface of a stirring shaft, and the inside of the container is evacuated to perform stirring (for example, see Patent Document 1).
That is, a bearing with a seal is disposed in the container, and the outer periphery of the rotating stirring shaft is sealed by the seal.
Further, a description will be given of such a conventional stirring device with reference to the cross-sectional side view of FIG. 3. A bearing member 42 with a mechanical seal 41 is connected to the opening side of the stirring container 40, and the sealing material of the mechanical seal 41 is used. Tightening is performed by the seal retainer 46, and 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 the stirring is performed in the stirring container 40.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2001-29764
[Problems to be solved by the invention]
In the conventional decompression stirrer, 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 wear (breakage) of the seal 41 is reduced. Then, the vacuum in the stirring vessel 40 is broken from the seal portion, so that a high vacuum cannot be expected (high vacuum cannot be maintained). Further, impurities such as abrasion powder in the seal portion and the bearing member and fragments of the seal 41 are generated. Has a problem in that it enters the stirring vessel 40 and mixes with the substance to be stirred, thereby lowering the purity of the product (reactant).
[0005]
Therefore, an object of the present invention is to provide a stirrer capable of obtaining a high vacuum state and obtaining a product with high purity.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a stirrer according to the present invention includes a completely hermetic motor, a stirring shaft with stirring blades rotationally driven by the motor, and a stirring shaft connected to a flange portion of the motor. , And a vacuum container that is sealed.
A flange member externally attached to the stirring shaft; and a stirrer shaft inserted into the bottom of the stirring shaft and surrounded by the stirring shaft to which the flange member is attached. And a bottomed cylindrical foreign-matter receiving member for preventing foreign matter from entering the housing. In addition, the bottom receiving portion of the foreign material receiving member has a rising peripheral wall which is fitted on the stirring shaft on the inner peripheral side thereof, and a drain for discharging the foreign material collected in the bottom receiving portion to the outside. A tube is connected to the bottom pan.
[0007]
Alternatively, a completely hermetic motor, a stirring shaft with stirring blades rotationally driven by the motor, and a vacuum vessel that is connected to a flange portion of the motor and accommodates the stirring shaft to be in a sealed state, The vacuum vessel has a connection pipe connected to the flange portion, and a stirring vessel connected to the connection pipe and being stirred by the stirring blade.
Further, the connection pipe has a protruding mouth portion through which the stirring shaft is inserted and to which the stirring vessel is connected, and an inner peripheral wall of the connection pipe which is reduced in diameter and is formed in a folded shape so as to be fitted around the stirring shaft. And a concave peripheral foreign matter receiving portion for preventing foreign matter from entering the stirring vessel. In addition, the connection pipe has a drain pipe part that discharges foreign matter collected in the concave foreign matter receiving part to the outside. The stirring vessel is connected by inserting the outlet of the connection pipe.
Further, the stirring shaft extends cantilevered from the motor without having a bearing in the vacuum vessel.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
[0009]
The stirring device according to the present invention is a device for stirring a substance in a container in a vacuum state, and FIG. 1 is a cross-sectional side view showing one embodiment of the stirring device.
This apparatus includes a completely sealed motor 3, a stirring shaft 2 with stirring blades 1 driven to rotate by the motor 3, and a vacuum which is connected to the flange portion 14 of the motor 3 and accommodates the stirring shaft 2 and is sealed. And a container A.
[0010]
The completely enclosed motor 3 referred to in the present invention includes a motor 3 having a speed reducer portion {a motor 3 connected to a speed reducer} in addition to the motor 3 having only a motor portion. The completely sealed type is a structure in which the motor casing is sealed, and the output shaft projects from the casing while maintaining the sealed state. Alternatively, the vacuum vessel A is connected at the flange portion 14 so that the casing together with the vacuum vessel A can be in a vacuum state.
[0011]
The flange portion (motor base) 14 formed on the output shaft side of the motor 3 is a disc member having a center hole 19 through which the output shaft of the motor 3 is inserted, and is sealed between the motor body 3a and the motor body 3a. ing. That is, by forming the motor (motor with reduction gear) 3 and the flange portion 14 to which the vacuum vessel A is connected integrally to form a sealed shape, it is possible to avoid the use of a mechanical seal and maintain a high vacuum.
[0012]
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 container 4) in the vacuum vessel A where the substance is actually stirred. (Blade).
[0013]
As shown in FIG. 1, the vacuum vessel A has a connection pipe 5 connected to the flange portion 14 of the motor 3, and a stirring vessel 4 connected to the connection pipe 5 and performing stirring by the stirring blade 1. The connection pipe 5 and the stirring vessel 4 may be made of glass, resin, or the like.
One end of the connection pipe 5 is a mating end face 18 that is hermetically connected to the flange portion 14 of the motor 3, is fastened by a clamp 20 (sanitary clamp), and the other end is an outlet that is connected to the stirring vessel 4. I have.
[0014]
The stirring vessel 4 has a spherical shell shape or a bottomed cylindrical bottle shape having an opening 26, and the opening 26 side is connected to the connection pipe 5. Note that the connection state shown in FIG. 1 is such that the opening of the connection pipe 5 is inserted into the opening 26 of the stirring vessel 4 so that the connection pipe 5 is fitted and sealed by rubbing. And simplifying the structure. Alternatively, although not shown, a structure in which the members are engaged with each other or a clamp may be used. Further, the vacuum vessel A may be a vessel in which the connection pipe 5 and the stirring vessel 4 are integrally connected.
[0015]
Further, the stirrer is a flange member (diffusion ring) for preventing foreign matter (lubricating oil, grease, abrasion powder, etc.) generated by the motor 3 or the coupling 17 from entering the stirring chamber 16 (stirring vessel 4). 6 and a foreign matter receiving member 7 are provided at an inner position of the connection pipe 5.
The flange member 6 is an annular disk member (disc) that is externally fitted to and attached to the stirring shaft 2. The flange member 6 covers the center hole 19 of the flange portion 14 with a gap, and the foreign matter receiving member 7, which will be described later. Two are provided at a position where the front end opening 9a of the rising peripheral wall 9 is covered with a gap.
[0016]
The foreign substance receiving member 7 is substantially cylindrical with a bottom, and the stirring shaft 2 is inserted through a hole at the center of the bottom (bottom surface), and is surrounded by the stirring shaft 2 to which the flange member 6 is attached. This is to prevent foreign matter from entering into the stirring chamber 16 (stirring container 4) of the container A. The bottom receiving portion 8 of the foreign-matter receiving member 7 has a rising peripheral wall portion 9 which is fitted on the inner peripheral side of the foreign matter receiving member 7 with a gap between the stirring shaft 2 and an oil pan portion (oil). Receiving part).
The opening side of the foreign material receiving member 7 is attached to the flange portion 14 of the motor 3 with a set screw or the like, and the foreign material receiving member 7 is positioned with respect to the vacuum container A at an inner position of the vacuum container A for stirring. It can be said that it becomes a double tube.
[0017]
As a result, when the stirring shaft 2 rotates, the flange member 6 also rotates together, and 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) of the foreign matter receiving member 7 to the bottom portion. Foreign matter is collected on the (bottom receiving portion 8).
Further, a drain pipe section 12 for discharging foreign matter collected in the bottom receiving section 8 to the outside of the vacuum vessel A is connected to the bottom receiving section 8.
[0018]
In FIG. 1, the drain pipe 12 is a pipe extending through the flange section 14 and extending to the outside. This pipe is connected to a vacuum pump (not shown) to evacuate the vacuum vessel A. Can be made. In other words, it can be said that a pressure reducing pipe having the exhaust pipe 24 and the exhaust port 25 also serves as the drain pipe section 12, and that foreign matter passes through the exhaust pipe 24 and is discharged from the exhaust port 25.
[0019]
FIG. 2 shows another embodiment of the stirring device. This apparatus includes a completely sealed motor 3, a stirring shaft 2 with stirring blades 1 driven to rotate by the motor 3, and a vacuum which is connected to the flange portion 14 of the motor 3 and accommodates the stirring shaft 2 and is sealed. And a container A. The vacuum vessel A has a connection pipe 5 connected to the flange portion 14 and a stirring vessel 4 connected to the connection pipe 5 and being stirred by the stirring blade 1 (to be a stirring empty space section 16). Note that the motor 3, the flange portion 14, and the stirring shaft 2 with the stirring blade 1 are the same as those in FIG.
[0020]
The connection pipe 5 and the stirring vessel 4 may be made of glass, resin, or the like. The connection pipe 5 has a mating end face 18 whose one end is sealingly connected to the flange 14 and is clamped by a clamp 20 (sanitary clamp). It is fastened. The connection pipe 5 has a bottle-shaped outer peripheral contour, and the connection pipe 5 has a protruding insertion port 10 on the other end side, through which the stirring shaft 2 is inserted and the stirring vessel 4 is connected. ing.
[0021]
The stirring vessel 4 has a spherical shell shape or a bottomed cylindrical bottle shape having an opening 26, and the opening 26 side is connected to the outlet 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 state, and is sealed by rubbing. This configuration facilitates attachment and detachment of the stirring container 4 and simplifies the structure. Alternatively, although not shown, a structure in which the members are engaged with each other or a clamp may be used.
[0022]
The connecting pipe 5 has an inner peripheral wall 5 a having a reduced diameter and a folded shape at the other end side, and an outer fitting shape on the stirring shaft 2 to prevent foreign matter from entering the stirring vessel 4. It has a foreign substance receiving portion 11. In other words, the concave peripheral foreign matter receiving portion 11 has an outer cylinder portion 22 whose outer peripheral side is a part of the connection pipe main body, and an inner cylinder which is formed as a double tube with the outer cylinder portion 22 and which is fitted to the stirring shaft 2 with a gap. A portion 21 and a folded concave circumferential connecting portion 23 that connects (connects) the outer cylindrical portion 22 and the inner cylindrical portion 21 to each other. In the connection tube 5, the inlet portion 10 and the inner cylindrical portion 21 of the concave peripheral foreign matter receiving portion 11 are concentric cylindrical shapes, and project (extend) in mutually opposite directions.
With this configuration and a flange member 6 described later, foreign substances cannot enter through the gap between the stirring shaft 2 and the inner cylindrical portion 21, and the foreign substances are collected in the concave peripheral foreign substance receiving portion 11. That is, the concave peripheral foreign matter receiving portion 11 serves as an oil pan portion.
[0023]
Further, the connection pipe 5 has a drain pipe section 13 for discharging foreign matters collected in the concave circumferential foreign matter receiving section 11 to the outside. More specifically, the drain pipe section 13 is formed in the folded concave circumferential connection section 23 so as to penetrate the pipe wall of the connection pipe 5, and the foreign matter collected by the folded concave circumferential connection section 23 is drained. It can be discharged from the pipe portion 13 to the outside of the connection pipe 5 immediately.
The drain tube 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 decompression tube also serves as the drain tube portion 13 and foreign matter is discharged from the decompression tube.
[0024]
Further, the stirrer is a flange member (diffusion) for surely preventing foreign matter (lubricating oil, grease, abrasion powder, etc.) generated by the motor 3 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 (disc) that is fitted to and attached to the stirring shaft 2 at an inner position of the connection pipe 5, and covers the center hole 19 of the flange portion 14 with a gap. And a position where a front opening 21a of the inner cylindrical portion 21 which is a part of the concave foreign matter receiving portion 11 is covered with a gap.
As a result, when the stirring shaft 2 rotates, the flange member 6 also rotates together, and 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 (connection pipe main body) of the concave peripheral foreign matter receiving portion 11. Foreign matter is collected at the bottom (concave circumference connecting portion 23).
[0025]
Further, in the stirring device of FIGS. 1 and 2, the stirring shaft 2 to which the stirring blade 1 is attached at the tip side extends cantilevered from the motor 3 without having a bearing in the vacuum vessel A. (Pending). 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 reduced. There is no generation of abrasion powder due to such factors.
[0026]
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 mounted and engaged with 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 is kept airtight so that a high vacuum can be maintained.
[0027]
In addition, since the motor casing is exposed to the atmosphere, natural cooling is possible, heat dissipation of the motor 3 is assisted, and the cooling efficiency of the motor 3 can be increased. Also, since the motor casing is exposed to the atmosphere, necessary At times, a cooling device can be attached. Further, since no mechanical seal is used, the motor torque can be reduced, and the heat generated by the motor 3 itself is reduced.
[0028]
【The invention's effect】
The present invention has the following effects by the above configuration.
[0029]
A mechanical seal (sealing means) around the stirring shaft 2 which has been conventionally required becomes unnecessary (according to claim 1 or 4). Accordingly, since no leakage occurs from the sealing means around the stirring shaft 2, the inside of the stirring vessel 4 can be made in a high vacuum state, and the purity of the chemical reaction product in a high vacuum can be improved.
Further, since no abrasion powder is generated from a sealing means such as a mechanical seal due to rotation of the stirring shaft 2, a high-purity stirring product can be obtained.
The device can be made compact, simple and lightweight.
[0030]
According to the second aspect, the flange member 6 serves as a shielding plate, and no foreign matter enters the stirring vessel 4 through the stirring shaft 2 from the motor 3 side. In addition, due to the centrifugal force generated by the rotation of the flange member 6 caused by the stirring shaft 2, foreign matter attached to the stirring shaft 2 and the flange member 6 can be projected (released) to the foreign matter receiving member 7 side, and the foreign matter is captured by the foreign matter receiving member 7 Can be collected and foreign matter can be prevented from entering the stirring chamber 16. The flange member 6 and the foreign matter receiving member 7 prevent lubricating oil (oil mist) or the like in the motor 3 from being mixed into the agitation chamber 16.
According to the third aspect, the foreign matter can be discharged to the outside of the apparatus, and the foreign matter never mixes with the stirring substance, so that a high-purity product without impurities can be obtained.
[0031]
(According to claim 5) Connection with the stirring vessel 4 is facilitated, and there is no need to construct and mount the concave peripheral foreign matter receiving portion 11 as a separate member, and foreign matter can be collected, and the foreign matter stirring vessel 4 can be prevented.
The foreign substances can be discharged to the outside of the apparatus (according to claim 6), the foreign substances never mix with the agitated substance, and a high-purity product free of impurities can be obtained.
(According to claim 7), the structure can be simplified, and the attachment and detachment of the stirring vessel 4 can be simplified.
Since no bearing is provided in the vacuum vessel A (according to claim 8), no abrasion powder is generated by the bearing and a high-purity agitated product can be obtained.
[Brief description of the drawings]
FIG. 1 is a sectional side view showing one embodiment of a stirring device of the present invention.
FIG. 2 is a sectional side view showing another embodiment of the stirring device of the present invention.
FIG. 3 is a sectional side view of a conventional stirring device.
[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 Flange member 7 Foreign material receiving member 8 Bottom receiving tray 9 Standing peripheral wall portion 10 Insert portion 11 Concave peripheral foreign material receiving portion 12 Drain tube portion 13 Drain tube portion 14 Flange part 16 Stirring empty room part A

Claims (8)

A completely sealed motor (3), a stirring shaft (2) with stirring blades (1) driven to rotate by the motor (3), and the stirring (14) connected to a flange portion (14) of the motor (3). A stirrer, comprising: a vacuum vessel (A) that accommodates the shaft (2) and is closed. A flange member (6) externally attached to the stirring shaft (2) and the stirring shaft (2) to which the stirring shaft (2) is inserted at the bottom and the flange member (6) is mounted. The stirrer according to claim 1, further comprising: a bottomed cylindrical foreign-matter receiving member (7) which is in a shape of an enclosure and which prevents foreign matter from entering into the stirring chamber (16) of the vacuum vessel (A). The bottom receiving portion (8) of the foreign matter receiving member (7) has a rising peripheral wall portion (9) which is fitted on the stirring shaft (2) on the inner peripheral side thereof, and has a bottom receiving portion (8). 3. The stirrer according to claim 2, wherein a drain pipe part (12) for discharging the foreign matter collected in the step (d) to the outside is connected to the bottom tray part (8). A completely sealed motor (3), a stirring shaft (2) with stirring blades (1) driven to rotate by the motor (3), and the stirring (14) connected to a flange portion (14) of the motor (3). A vacuum vessel (A) that accommodates the shaft (2) and is closed; the vacuum vessel (A) includes a connection pipe (5) connected to the flange portion (14), and a connection pipe ( A stirring vessel (4) connected to the stirring blade (1) and connected to the stirring blade (1). The connecting pipe (5) has a projecting opening (10) through which the stirring shaft (2) is inserted and the stirring vessel (4) is connected, and an inner peripheral wall (5a) of the connecting pipe (5). And a concave peripheral foreign matter receiving portion (11) formed to have a reduced diameter and formed in a folded shape and fitted externally to the stirring shaft (2) to prevent foreign matter from entering the stirring vessel (4). 5. The stirring device according to 4. The stirrer according to claim 5, wherein the connection pipe (5) has a drain pipe part (13) for discharging foreign matters collected in the concave foreign matter receiving part (11) to the outside. The stirrer according to claim 5 or 6, wherein the stirrer (4) is connected by inserting the inlet (10) of the connection pipe (5). 7. The agitating shaft (2) extends cantilevered from the motor (3) without having a bearing portion in the vacuum vessel (A). Or the stirrer according to 7.

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