JP2015205239A - Seal device for drive shaft of stirring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suitable stirring device that maintains sealability of a stirring device.SOLUTION: A seal device for a drive shaft of a stirring device comprises an opening 2a of a stirring vessel 2, which is provided with a stirring blade and in which a driving shaft 5 reciprocated by reciprocation drive means reciprocatably passes through the stirring vessel 2, and a membraneous body 6 which airtightly closes the opening 2a, which is connected and fixed to the stirring vessel 2 and the driving shaft 5 and which is made of a flexible member or an elastic member.

Description

  The present invention relates to a seal device that seals a stirring shaft and a drive shaft that is provided so as to penetrate the stirring container.

  Conventionally, a mechanical seal device has been used as a sealing device that is provided through the stirring vessel and seals a rotating shaft that is driven to rotate, but there is a rotating sliding portion between the rotating shaft and the stirring vessel. Through this sliding portion, there is a risk that foreign matter is inserted (contaminated) into the stirring container from the outside, or the contents leak to the outside of the container. Therefore, such a sealing device is not preferable in a field where sanitary properties such as medicines, medicines and fine chemicals are regarded as important.

  In order to solve the problem of the rotating sliding portion, for example, by using superconductivity, the stirring blade inserted into the stirring vessel is levitated from the bottom of the stirring vessel and is not in contact with the rotating means of the stirring blade. There is a stirring device that stirs the contents in the stirring container by rotating the stirring blade by the rotating means. According to this stirrer, the contents can be stirred while the stirring container is completely sealed, so there is no risk of contamination or leakage of the contents to the outside of the stirring container (Patent Document 1).

JP 2006-35098 A

  However, in the conventional stirring device that rotates the stirring blade in a non-contact manner with the rotating means of the rotary blade, the stirring blade cannot be enlarged due to the transmission torque, and the design of the stirring blade is limited, and the stirring efficiency is reduced. There was a drawback that it could not be increased.

  An object of the present invention is to solve these problems and to provide a stirring device that can realize good stirring.

  In order to achieve the above object, the present invention provides a seal device for a drive shaft of a stirrer, in which the drive shaft reciprocated by a reciprocating drive means provided with a stirring blade penetrates the agitation tank so as to reciprocate freely. An opening of the tank, and a film-like body made of a flexible member or an elastic member, which is airtightly closed to the opening and connected and fixed to the agitation tank and the drive shaft. By making use of the flexibility or elasticity of the film-like body that closes the part, the inside of the stirring tank can be stirred in a sealed state.

  According to the present invention, by closing the opening that penetrates the drive shaft that reciprocates in a vertically movable manner with a flexible or elastic film state, the container can be completely sealed, and foreign matter contamination (contamination can occur). ) And the risk of the contents leaking outside the container is eliminated. In addition, the size of the stirring blade can be increased, and the design of the stirring blade for obtaining an appropriate flow and stirring action can be freely designed, so that both sterility and good stirring can be realized.

It is a vertical side view when a drive shaft is located in a top dead center in the seal device of the drive shaft of Example 1 of the present invention. It is a vertical side view when a drive shaft is located in a bottom dead center in this sealing device. It is a vertical side view when a drive shaft is located in the uppermost part in this sealing device. It is a vertical side view of the sealing device of the drive shaft of the stirring apparatus of Example 2 of this invention.

  The example of the form for carrying out the present invention is shown below.

  A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a longitudinal side view of the drive shaft of the seal device of the first embodiment of the present invention when the drive shaft of the seal device is located at the top dead center, and FIG. FIG. 3 shows a longitudinal side view when the drive shaft of the sealing device is located at the uppermost position.

  Reference numeral 1 denotes a drive shaft seal device of the stirring device of the present invention, 2 denotes a stirring tank of the stirring device, and an opening 3 is formed in the ceiling wall 2 a of the stirring tank 2.

  Reference numeral 4 denotes an auxiliary plate for closing the opening 3, which is airtightly fixed to the upper surface of the ceiling wall 2 a, and a hole 4 a for inserting a drive shaft is formed at the center of the auxiliary plate 4.

  Reference numeral 5 denotes a drive shaft, and the drive shaft 5 is provided on a reciprocating drive device such as a vertical drive device provided above the ceiling wall 2a. Is inserted into the stirring tank 2. The diameter of the drive shaft 5 is smaller than the hole 4a, and the drive shaft 5 is formed to be movable up and down in the hole 4a.

  Reference numeral 6 denotes a first film-like body made of a flexible member or an elastic member, and the first film-like body 6 is formed in a sheet shape having a hole, and the outer edge of the first film-like body 6 The portion is airtightly fixed to, for example, the lower surface of the auxiliary plate 4, and the hole edge of the inner portion of the first film-like body 6 is airtightly fixed to the outer periphery of the drive shaft 5. The hole 4 a is hermetically sealed in the stirring tank 2 by the film-like body 6. The first film-like body 6 is made of, for example, a silicon sheet.

  The first film-like body 6 is loosely fixed to the auxiliary plate 4 and the drive shaft 5 when the first film-like body 6 is a flexible member, and the drive shaft 6 is The first film state 6 is formed so as not to be damaged even when reciprocating up and down.

  Reference numeral 7 denotes a second film-like body made of a flexible member or an elastic member, and the second film-like body 7 is formed in a sheet shape having holes, as in the first film state 6, The outer edge portion of the second film-like body 7 is airtightly fixed to, for example, the upper surface of the auxiliary plate 4, and the hole edge portion of the inner portion of the second film-like body 7 is connected to the drive shaft 5. The second film-like body 7 is hermetically fixed and hermetically sealed outside the agitation tank 2.

  Note that the second film-like body 7 also has the auxiliary plate 4 and the drive shaft when the second film-like body 7 is a flexible member, like the first film-like body 6. The second film state 7 is fixed so as not to be damaged even if the drive shaft 6 reciprocates up and down.

  Reference numeral 8 denotes a flange, which is provided, for example, on the outer periphery of the drive shaft 5 between the auxiliary plate 4 and the first film-like body 6. The hole 4a is formed in a size that can be closed.

  Further, a pressure-resistant member 9 is provided on at least one of the contact surfaces of the upper surface of the flange portion 8 and the lower surface of the auxiliary plate 4, and the auxiliary plate 4, the flange portion 8, and the pressure-resistant member are provided. The pressure member is formed by the pressure member when the drive shaft 5 is moved upward and the upper surface of the flange portion 8 and the lower surface of the auxiliary plate 4 are brought into contact with each other. 9, the hole 4a of the auxiliary plate 4 is airtightly closed so that the pressure in the tank can be prevented from being released. As will be described later, even if the pressure in the tank increases, the film-like bodies 6 and 7 can be prevented from being damaged.

  Examples of the pressure-resistant member 9 include a Teflon (registered trademark) sheet and an O-ring.

  Instead of providing the flange 8 on the outer periphery of the drive shaft 5 between the auxiliary plate 4 and the first film-like body 6, the auxiliary plate 4 and the second film-like body 7 The pressure-resistant member 9 may be provided on at least one of the contact surfaces between the lower surface of the flange portion 8 and the upper surface of the auxiliary plate 4. It may be.

  Reference numeral 10 denotes a space chamber formed between the auxiliary plate 4, the drive shaft 5, and the first film-like body 6, and 11 denotes the space chamber 10 provided in the auxiliary plate 4 and the agitation. It is a vent hole that communicates with the outside of the tank 2.

  Next, the operation and effects of the first embodiment of the present invention will be described.

In the drive shaft sealing device of the present invention, the contents (stirred object) in the agitation tank 2 can be agitated by reciprocating the drive shaft 5 with a reciprocating device. When the drive shaft 5 is reciprocated, the vent hole 11 is closed.

As shown in FIGS. 1 and 2, even if the drive shaft 5 is reciprocated up and down by a reciprocating drive device, the first film-like body 6 and the second film-like body 7 are bent, Or, since it extends, the airtight state in the agitation tank 2 can be maintained, and it is possible to prevent the risk of foreign matter being inserted (contaminated) into the agitation tank from the outside, or the contents leaking outside the tank. it can.

  Further, even when the first film-like body 6 is damaged, the second film-like body 7 can maintain an airtight state, so that contamination and contents can be prevented from leaking outside the tank. become.

  In the reciprocating motion of the agitation shaft 5, the flange 8 and the auxiliary plate 4 do not come into contact with each other at the top dead center of the drive shaft 5 so that the pressure-resistant member 9 is not damaged.

  In addition, when SIP steam sterilization (steam sterilization) is performed before or after stirring in the stirring layer 2, as shown in FIG. It raises until it contacts the lower surface of the board 4, and the said pressure | voltage resistant means airtightly blocks the hole 4a of the said auxiliary | assistant board 4, and opens the said vent hole 11.

Thereby, by performing SIP steam sterilization, the hole 4a of the auxiliary plate 4 is closed even when the inside of the stirring tank is at a high pressure. It protrudes out of the stirring tank 2 through the 4 holes 4a, and does not swell and break due to pressure. Similarly, the second film state 7 can be prevented from being swollen and damaged by pressure.

  The gas in the space 10 is released to the outside through the vent hole 11 due to the pressure in the stirring tank 2.

  In this embodiment, the drive shaft 5 is vertically suspended and moved in the vertical direction. However, the drive shaft 5 can be moved in any direction, for example, the drive shaft 5 is horizontally disposed and moved in the lateral direction. It is also possible to reciprocate in this arbitrary direction toward

  FIG. 4 shows a second embodiment of the seal device for the drive shaft of the stirring device of the present invention. In this embodiment, the first film-like body 6 and the second film-like body 7 in the first embodiment are used. In addition, an example in which a third film-like body 12 and a fourth film-like body 13 are further provided is shown.

  In addition, 14 is a 2nd auxiliary | assistant board, and this auxiliary | assistant board 14 has the hole 14a for insertion of the said drive shaft 5 formed in the center part. The second auxiliary plate 14 is provided above the auxiliary plate 4 and is airtightly fixed by a cylindrical member 15 that is airtightly suspended from the upper surface of the auxiliary plate 4.

Similar to the first and second film states 6 and 7, the third film-like body 12 is formed in a sheet shape having a hole, and the outer edge portion of the third film-like body 12 is the second auxiliary body. For example, the lower edge of the plate 14 is airtightly fixed to the lower surface, and the inner edge of the third film-like body 12 is airtightly fixed to the drive shaft 5. Between the second film-like body 7, the auxiliary plate 4, the cylindrical member 15, the second auxiliary plate 14, the third film-like body 12, and the drive shaft 5. The closed space 16 is formed in FIG.

Reference numeral 17 denotes a pressure sensor provided on the cylindrical member 15. The pressure sensor 17 monitors the pressure in the sealed space 16. When the pressure is abnormal, the first and second pressure sensors 17 are provided. It is determined that the film-like bodies 6 and 7 are damaged.

  Further, the fourth film-like body 13 is formed in a sheet shape having holes, like the respective film-like bodies 6, 7, and 12, and the outer edge portion of the fourth film-like body 13 is For example, the auxiliary plate 14 is airtightly fixed to, for example, the upper surface, and the inner edge of the fourth membrane 13 is airtightly fixed to the drive shaft 5. A sealed space 18 is formed between the third film-like body 12, the second auxiliary plate 14, the fourth film-like body 13, and the drive shaft 5.

  In the second embodiment, since the opening 3 is hermetically closed by a plurality of film-like bodies, the service life of the sealing device can be extended. Further, the abnormal state of the membranous body can be detected by the pressure sensor.

  As described above, the number of film-like bodies is adjusted according to the stirring conditions, the object to be stirred, the service life, etc., whereby the contents leak out of the stirring tank 2 or impurities enter the stirring tank 2. Can be prevented.

  The stirring device of the present invention is used for stirring in medical products, foods, and the like.

DESCRIPTION OF SYMBOLS 1 Sealing device 2 Stirrer tank 2a Ceiling wall 3 Opening part 4 Auxiliary plate 4a Hole 5 Drive shaft 6 1st film-like body 7 2nd film-like body 8 Gutter part 9 Pressure-resistant member 10 Air chamber 11 Vent hole 12 3rd Film body 13 Fourth film body 14 Second auxiliary plate 15 Cylindrical member 16 Sealed space 17 Pressure sensor 18 Sealed space

Claims (5)

  A drive shaft provided with a stirring blade and reciprocatingly driven by a reciprocating drive means penetrates the stirring tank in a reciprocating manner, and the stirring tank and the drive shaft are hermetically closed. A drive shaft seal device for a stirrer characterized by comprising a film-like body made of a flexible member or an elastic member, which is connected and fixed to.   2. The sealing device for a drive shaft of a stirring device according to claim 1, further comprising pressure-resistant means for closing the opening.   The pressure-resistant means includes at least a flange part fixed to the outer peripheral surface of the drive shaft and formed to a size capable of closing the opening, and each contact surface of the flange part and the agitation tank that contact each other. The seal device for the drive shaft of the stirring device according to claim 2, comprising a pressure-resistant member provided on one surface.   4. The seal device for the drive shaft of the agitator according to claim 1, wherein a plurality of film-like bodies that hermetically close the opening are provided. 5. 5. The seal device for a drive shaft of an agitator according to claim 4, further comprising detection means for detecting an internal pressure in a sealed space formed between the two adjacent film-like bodies.

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