JPH05184098A - Stirrer for enclosed container - Google Patents

Abstract

PURPOSE:To realize stirring of liquid in a perfectly enclosed structure without limiting the effective space in the enclosed container by modifying a canned motor suitably for stirring the liquid. CONSTITUTION:A canned motor 12 is secured hermetically to an enclosed container 1 containing liquid such that a stator 14 constitutes a part of the container so that the effective space in the container is not limited while a rotor 15 is projected into the container. An impeller 13 rotates together with the rotor 15 to stir the liquid A in the enclosed container 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agitator for a hermetic container used for vacuum defoaming treatment by agitating a liquid in a hermetic container, for promoting a chemical reaction, and the like.

[0002]

2. Description of the Related Art As a conventional stirring device for a sealed container used for performing vacuum defoaming treatment of liquid and treatment for promoting a chemical reaction, there is one shown in FIG. That is, container 2
The lid 3 is airtightly covered on the opening of the to form the closed container 1,
A predetermined liquid A is stored inside the closed container 1. The lid 3 is provided with an insertion hole 4, and an O-ring,
A seal 5 such as a mechanical seal or a labyrinth seal is attached. The stirring device 6 includes a blade 7 inside the closed container 1.
The rotary shaft 8 having the above is inserted through the seal 5, and the motor 9 outside the container is connected to the rotary shaft 8. In such a configuration, by energizing and driving the motor 9, the blades 7 of the rotary shaft 8 are rotated in the liquid A to be stirred, and at this time, the seal 6 allows the rotary shaft 8 to rotate while allowing the inside of the container to rotate. It keeps the airtightness of.

However, in the agitator 6 described above, a slight gap is required to allow the rotation of the rotary shaft 8 regardless of the structure of the seal 5, which causes a pressure difference between the inside and the outside of the container. If it occurs, it is unavoidable to leak from the seal 5. In particular, when the inside of the closed container 1 is processed in a vacuum, the degree of vacuum is lowered, and when the liquid inside the closed container 1 is a dangerous gas or the like, the gas may leak. Therefore, it cannot be used when such conditions or liquids are used, and the usage is necessarily limited.

On the other hand, in order to completely seal the closed container 1,
It may be considered that the driving motor 9 is also installed inside the closed container 1. However, in this case, there is a problem that the space effective for stirring the liquid inside the container is limited, and further, the disassembly of each part when cleaning and maintaining the inside of the container becomes very complicated.

From this, it is desired to improve the stirring device so that the liquid can be stirred with a completely closed structure without restricting the effective space inside the closed container so much. As a solution to this problem, it has been considered that a thin rotating means such as a canned type motor is improved so as to be suitable for agitating a liquid and then mounted inside a closed container.

Conventionally, there are various prior arts regarding the canned type motor. For example, JP-A-63-299
No. 727, “Canned motor and manufacturing method thereof”
Then, when installing a can to shut off the stator mounted in the housing from the outside, use a thick can base made of a non-magnetic material with a through hole into which a teen of the stator and a magnet are inserted. It is disclosed. Further, in the "multi-pole synchronous motor" of Japanese Utility Model Publication No. 55-37539, the magnet plate of the rotor facing the stator is
It is disclosed to be housed and configured in an oil-filled sealed case. Further, there is a "canned motor" disclosed in Japanese Utility Model Laid-Open No. 62-129260.

[0007]

By the way, in each of the above-mentioned prior arts, there is no disclosure of using a canned type motor alone as a motor and using it as an agitator. ..

The present invention has been made in view of the above points, and improves the canned type motor so as to be suitable for agitating a liquid, and does not limit the effective space inside the hermetically sealed container, thereby providing a completely hermetically sealed structure. It is an object of the present invention to obtain a stirring device in a closed container that enables stirring of a liquid.

[0009]

To achieve the above object, according to the present invention, a canned type motor having a stator and a rotor in an airtight container in which a liquid is contained has a stator and a part of the container. The rotor is provided with an impeller for stirring the liquid, which is fixed so as to maintain the airtightness inside the container and is mounted so as to project inside the container.

[0010]

According to the above structure, the canned motor is hermetically sealed in the hermetically sealed container without restricting the effective space inside the container with the stator, and the rotor and the impeller are projected into the container. It is installed. When the canned type motor is energized, the rotor and the impeller are rotated by the magnetic forces of the stator and the rotor, and the liquid inside the sealed container is well agitated under the condition that the conditions do not change at all.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. Referring to FIG. 1, the overall structure of the stirring device for a closed container will be described. The closed container 1 is formed by hermetically covering the container 2 with the lid 3, and the predetermined liquid A is contained in the closed container 1. The stirring device 10 includes a canned type motor 12 mounted in a mounting hole 11 in the bottom 2a of the container 2.
And an impeller 13 provided on the rotor side of the canned type motor 12.

In FIG. 2, the canned type motor 12
Will be described. The canned type motor 12 includes a stator 14 and a rotor 15. The stator 14 is
The plate-shaped fixed plate 16 has a case 18 having a cylindrical body 17 that can be fitted into the mounting hole 11, and a plurality of armature windings 19 are radially arranged inside the cylindrical body 17 A bearing 21 is provided on the boss 20. The lead wire 22 from the armature winding 19 is taken out from the hole 23 of the fixed plate 16, and a can 24 for sealing the armature winding 19 is attached. The can 24 is a non-magnetic material such as austenitic stainless steel having a small electric resistance, and is fixed between the cylindrical body 17 and the boss 20 by welding or adhesion so as to seal.

The rotor 15 is provided with an impeller 13 for stirring on an upper portion of a rotating disk 25, and a field 26 composed of a plurality of permanent magnets is radially fixed on the lower portion of the impeller 13. A rotary shaft 27 is attached to the center of the rotary disc 25.
By inserting 7 into the bearing 21 of the stator 14, the rotor 1
A field magnet 26 of No. 5 is rotatably supported in a state of closely facing the armature winding 19 of the stator 14.

The stator 14 of the canned type motor 12 is fitted with the cylindrical body 17 of the case 18 in the mounting hole 11 at the bottom 2a of the container 2 and the fixing plate 16 is sealed with an O-ring 28 to seal the outside. Is closely attached to the container bottom portion 2a and fixed by the bolt 29. Thus the stator 1
The container 4 forms a part of the container 2 and does not limit the effective space inside the container 2, and is mounted in a completely sealed state in which the inside of the container is kept airtight. And rotor 15 and impeller 1
Only 3 will be able to project inside the container and rotate in the liquid.

Next, the operation of this embodiment will be described. When a rotating magnetic field is applied to the armature winding 19 of the stator 14 by energizing the canned type motor 12 through the lead wire 22 when stirring the liquid A, the magnetic force between the armature winding 19 and the field magnet 26 causes a rotation circle. Rotational force is applied to the plate 25. Then, the rotor 15 and the impeller 13 rotate together with the rotating shaft 27 supported by the bearing 21, and the impeller 13 agitates the liquid A inside the closed container 1 in a state where it is completely airtight. As a result, even if the inside of the closed container 1 is in a vacuum state or is a dangerous gas, the liquid A is safely stirred under the condition that the conditions do not change at all.

Another embodiment of the present invention will be described with reference to FIG. In this embodiment, a support shaft 30 is integrally projectingly provided at the center of the case 18 of the stator 14 of the canned type motor 12. A bearing 31 is provided at the center of the rotating disk 25 of the rotor 15, and the bearing 31 is fitted to the support shaft 30 to rotatably support the rotor 15. Other than that, the configuration is exactly the same as that of the above-described embodiment, and the same portions are denoted by the same reference numerals and the description thereof will be omitted.

Therefore, in this embodiment, by energizing the canned type motor 12, the rotor 15 and the impeller 13 are energized.
However, it rotates while being supported by the support shaft 30, and similarly the liquid A inside the closed container 1 is agitated.

[0018]

As described above, according to the present invention, the canister type motor is installed as a complete hermetic structure as a stirring device for a hermetically sealed container, so that the hermeticity of the interior of the container is completely maintained. The liquid can be treated by stirring. Since the canned type motor is mounted by projecting only the rotor and the impeller into the container, the effective space inside the container is not limited. Since the rotor and the impeller can be attached and detached with the stator left as it is, maintenance such as cleaning of the inside of the container and replacement of the impeller is facilitated.

Further, the structure of the rotor is further simplified.
You can also replace the worn bearing with the rotor,
Cleaning of the stator side is also easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a stirring device for a closed container according to the present invention.

FIG. 2 is an enlarged sectional view showing a portion of a canned type motor.

FIG. 3 is an enlarged sectional view showing a main part of another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a configuration of a stirring device for a closed container in a conventional example.

[Explanation of symbols]

 1 Airtight Container 2 Container 12 Canned Type Motor 13 Impeller 14 Stator 15 Rotor 17 Cylindrical 18 Case 19 Armature Winding 21 Bearing 22 Lead Wire 24 Can 25 Rotating Disc 26 Field 27 Rotating Shaft 30 Support Shaft 31 Bearing

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[Procedure amendment]

[Submission date] March 31, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

However, in the agitator 6 described above, a slight gap is required to allow the rotation of the rotary shaft 8 regardless of the structure of the seal 5, which causes a pressure difference between the inside and the outside of the container. If it occurs, it is unavoidable to leak from the seal 5. In particular, when the inside of the closed container 1 is processed in a vacuum, the degree of vacuum is lowered, and when a dangerous gas or the like is put into the inside of the closed container 1 , the gas leaks. Sometimes. Therefore, when it is used under such conditions , it cannot be used and the intended use is necessarily limited.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

Conventionally, there are various prior arts regarding the canned type motor. For example, JP-A-63-299
No. 727, “Canned motor and manufacturing method thereof”
In the case of mounting the can to block the stator mounted within the housing from the outside, the wall thickness made of a nonmagnetic material pierces holes are formed tea scan <br/> and magnets of the stator is inserted Is disclosed. Further, in the "multi-pole synchronous motor" of Japanese Utility Model Publication No. 55-37539, the magnet plate of the rotor facing the stator is
It is disclosed to be housed and configured in an oil-filled sealed case. Further, there is a "canned motor" disclosed in Japanese Utility Model Laid-Open No. 62-129260.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0019

[Correction method] Change

[Correction content]

Also, the shaft is integrated with the stator side.
Therefore, the rotor structure is further simplified and the worn bearings are rotated.
It is possible to replace it together with the trochanter,
Cleaning is also easy.

Claims (3)

[Claims] 1. A canned type motor having a stator and a rotor is fixed to a hermetically sealed container in which a liquid is contained so that the stator forms a part of the container and maintains airtightness inside the container. A stirrer for a hermetically sealed container, wherein a child is mounted so as to project inside the container, and an impeller for stirring the liquid is provided on the rotor. 2. The stator of the canned type motor comprises:
A case that is fitted in a mounting hole of an airtight container and is airtightly fixed, an armature winding that is hermetically disposed inside the case with a can, and a lead wire that is extracted from the armature winding to the outside of the case, A rotor disposed at the center of the case, the rotor having an impeller, a rotating disc having a field, and a rotating shaft provided at the center of the rotating disc and supported by the bearing. The stirring device for a closed container according to claim 1. 3. The stator of the canned type motor comprises:
A case that is fitted in a mounting hole of an airtight container and is airtightly fixed, an armature winding that is hermetically disposed inside the case with a can, and a lead wire that is extracted from the armature winding to the outside of the case, A rotor having an impeller, a rotating disk having a field, and a bearing provided at the center of the rotating disk and supported by the support shaft. The stirring device for a closed container according to claim 1.