CN112934038A

CN112934038A - Stirring shaft anti-shaking device in sanitary tank and stirring tank

Info

Publication number: CN112934038A
Application number: CN202110337905.8A
Authority: CN
Inventors: 石志秋
Original assignee: Guoruitai Wuhan Fluid System Co ltd
Current assignee: Guoruitai Wuhan Fluid System Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-06-11

Abstract

The invention discloses a sanitary in-tank stirring shaft anti-shaking device and a stirring tank, wherein the sanitary in-tank stirring shaft anti-shaking device comprises a rotary disc, a fixed disc, a stirring shaft, a first magnet and a second magnet; the rotating disc is positioned in the tank body and arranged at one end of the stirring shaft; one end of the stirring shaft, which is far away from the turntable, is used for being in power coupling connection with a driving mechanism so as to drive the stirring shaft to rotate; the fixed disc is arranged in the tank body and is positioned on the periphery of the rotating disc; the first magnet and the second magnet are respectively arranged on the rotating disc and the fixed disc, the first magnet and the second magnet are arranged along the rotating direction of the stirring shaft, and the first magnet and the second magnet are magnetically repelled. In the technical scheme provided by the invention, the principle that like poles of magnets repel each other is utilized, and the rotating disc and the stirring shaft connected with the rotating disc are suspended under the action of magnetic force between the fixed disc and the rotating disc, so that the problem of shaking of the stirring shaft can be solved under the conditions of meeting sanitation and CIP/SIP.

Description

Stirring shaft anti-shaking device in sanitary tank and stirring tank

Technical Field

The invention relates to the technical field of biological pharmaceutical equipment, in particular to a sanitary in-tank stirring shaft anti-shaking device and a stirring tank.

Background

In the production of biological pharmacy, many technological processes need to use the jar body with stirring, such as bioreactor, fermentation cylinder, liquid preparation agitator tank, etc., however, the present agitator tank, whether stir in last or stir down all has a fatal defect, that is the shake of the (mixing) shaft, and the serious person even causes the whole jar of body resonance, and the existing solution has several: 1. the rigidity of the stirring shaft is increased; 2. limiting the length of agitation; 3. bearing fixing seat.

The shaking of the stirring shaft can be relieved to a certain extent by the above modes, but other problems are brought. Firstly, the rigidity of the stirring shaft is increased, one way is to increase the diameter of the shaft and choose a thicker stirring shaft, as a result of which the investment and the operating cost are increased; and in another mode, a material with higher strength and corrosion resistance is selected, so that the manufacturing cost is greatly increased. Secondly, the length of stirring is limited, the capacity of the tank body is limited, the scale of single batch production is limited, the cost of unit products is increased, and some products cannot meet the process requirements. Thirdly, a bearing fixing seat is added. Two types of fixed bearings are provided, one type is a SiC friction surface, and the other type is a rolling bearing, both of which have the problems of lubrication and difficult cleaning, and the sanitary requirements are difficult to meet.

Disclosure of Invention

The invention aims to provide a sanitary in-tank stirring shaft anti-shaking device and a stirring tank aiming at thoroughly solving the problem of shaking of a stirring shaft of the stirring tank under the conditions of not increasing the operating cost, not greatly increasing the investment and meeting the sanitary condition and CIP/SIP condition.

The invention provides a sanitary in-tank stirring shaft anti-shaking device which comprises a rotary disc, a fixed disc, a stirring shaft, a first magnet and a second magnet, wherein the fixed disc is arranged on the rotary disc;

the rotating disc is positioned in the tank body and is arranged at one end of the stirring shaft;

one end of the stirring shaft, which is far away from the rotating disc, is used for being in power coupling connection with a driving mechanism so as to drive the stirring shaft to rotate;

the fixed disc is arranged in the tank body and is positioned on the periphery of the rotating disc;

the first magnet and the second magnet are respectively arranged on the rotating disc and the fixed disc, the first magnet and the second magnet are arranged along the rotating direction of the stirring shaft, and the first magnet and the second magnet repel each other magnetically.

Optionally, the first magnet is disposed inside the rotary plate, and the second magnet is disposed inside the fixed plate.

Optionally, the first magnet and the second magnet are uniformly arranged at intervals along the rotation direction of the stirring shaft, and the first magnets are respectively opposite to the second magnets in the radial direction of the stirring shaft.

Optionally, the first magnet and the second magnet are both magnetic strips arranged along the radial direction of the stirring shaft.

Optionally, the fixed plate is connected with the tank body through a support frame.

Optionally, the fixed disc, the rotating disc and the stirring shaft are coaxially arranged.

Optionally, the first magnet is disposed at the bottom of the turntable, and the bottom of the turntable is disposed in a cylindrical shape;

the fixed disc is arranged in a circular ring shape, the fixed disc is sleeved outside the bottom of the rotary disc, and a gap is reserved between the fixed disc and the rotary disc in the radial direction of the stirring shaft.

Optionally, the end face of the stirring shaft close to the turntable is provided with a threaded hole, and the top end face of the turntable is provided with a threaded column in threaded fit with the threaded hole.

Optionally, a gasket is clamped between the end face of the stirring shaft close to the rotating disc and the top end face of the rotating disc.

The invention also provides a stirring tank, which comprises the sanitary in-tank stirring shaft anti-shaking device.

In the technical scheme provided by the invention, the principle that like poles of magnets repel each other is utilized, and the rotating disc and the stirring shaft connected with the rotating disc are suspended under the action of magnetic force between the fixed disc and the rotating disc, so that the problem of shaking of the stirring shaft can be solved under the conditions of meeting sanitation and CIP/SIP.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a sanitary in-tank stirring shaft anti-shaking device provided by the present invention;

FIG. 2 is a partial cross-sectional view of the anti-whipping device of the sanitary in-tank agitator shaft of FIG. 1;

FIG. 3 is a layout view of the first and second magnets of FIG. 2;

the reference numbers illustrate: the stirring device comprises a rotary table 1, a fixed table 2, a stirring shaft 3, a first magnet 4, a second magnet 5, a driving mechanism 6, a supporting frame 7 and a gasket 8.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a sanitary in-tank stirring shaft anti-shaking device, which comprises a rotating disc 1, a fixed disc 2, a stirring shaft 3, a first magnet 4 and a second magnet 5, as shown in figures 1 and 2.

As shown in fig. 1 and fig. 2, in the present embodiment, a rotating disc 1 is located inside the tank body, and the rotating disc 1 is arranged at one end of a stirring shaft 3; one end of the stirring shaft 3, which is far away from the turntable 1, is used for being in power coupling connection with a driving mechanism 6 so as to drive the stirring shaft 3 to rotate; the fixed disc 2 is arranged in the tank body, and the fixed disc 2 is positioned on the periphery of the rotating disc 1; wherein, first magnet 4 and second magnet 5 are located carousel 1 and fixed disk 2 respectively, and first magnet 4 and second magnet 5 all arrange along the direction of rotation of (mixing) shaft 3, and first magnet 4 and second magnet 5 magnetism repulse.

Specifically, by utilizing the principle that like poles of a first magnet 4 and a second magnet 5 repel each other, the rotating disc 1 and the stirring shaft 3 connected with the rotating disc 1 are suspended through the magnetic action between the fixed disc 2 and the rotating disc 1, so that the radial swing of the stirring shaft 3 in the stirring process is eliminated; and there is no contact between the fixed plate 2 and the rotary plate 1, no friction is generated, and the gap between the fixed plate 2 and the rotary plate 1 can realize CIP/SIP.

As shown in fig. 1 and 2, in the present embodiment, the first magnet 4 is provided inside the turntable 1, and the second magnet 5 is provided inside the surface plate 2. To meet the hygiene and CIP/SIP requirements, a first magnet 4 is enclosed within the rotating disc 1 and a second magnet 5 is enclosed within the stationary disc 2.

The first magnet 4 and the second magnet 5 are both arranged along the rotation direction of the stirring shaft 3, and specifically, as shown in fig. 3, in the present embodiment, the first magnet 4 and the second magnet 5 are provided in plurality at regular intervals along the rotation direction of the stirring shaft 3, and the plurality of first magnets 4 are respectively opposed to the plurality of second magnets 5 one by one in the radial direction of the stirring shaft 3.

As shown in fig. 2 and 3, in the present embodiment, each of the first magnet 4 and the second magnet 5 is a magnetic strip arranged in the radial direction of the stirring shaft 3. For example, as shown in fig. 3, the S-pole of the first magnet 4 faces the rotation axis of the stirring shaft 3, the N-pole of the second magnet 5 faces the rotation axis of the stirring shaft 3, and the widths of the first magnet 4 and the second magnet 5 become gradually smaller in a direction close to the rotation axis of the stirring shaft 3, the widths of the first magnet 4 and the second magnet 5 being the sizes of the first magnet 4 and the second magnet 5 in the rotation direction of the stirring shaft 3.

The fixed plate 2 is arranged inside the tank body, and specifically, as shown in fig. 2, in the present embodiment, the fixed plate 2 is connected with the tank body through a support frame 7. And, the supporting frame 7 is usually provided in plural in the rotation direction of the agitating shaft 3.

As shown in fig. 2, in the present embodiment, the fixed plate 2, the rotating plate 1 and the stirring shaft 3 are generally coaxially arranged. This is advantageous in eliminating radial oscillation of the stirring shaft 3 during stirring.

As shown in fig. 1 and 2, in the present embodiment, the first magnet 4 is disposed at the bottom of the turntable 1, and the bottom of the turntable 1 is disposed in a cylindrical shape; the fixed disc 2 is arranged in a circular ring shape, the fixed disc 2 is sleeved outside the bottom of the rotary disc 1, and a gap is reserved between the fixed disc 2 and the rotary disc 1 in the radial direction of the stirring shaft 3. So that the magnetic forces between the fixed 2 and the turntable 1 are more balanced.

The rotating disc 1 is disposed at one end of the stirring shaft 3, specifically, as shown in fig. 1 and fig. 2, in this embodiment, the end surface of the stirring shaft 3 close to the rotating disc 1 is provided with a threaded hole, and the top end surface of the rotating disc 1 is provided with a threaded column in threaded fit with the threaded hole. The stirring shaft 3 and the rotating disc 1 are connected into a whole through back-off threads. The top of the rotating disc 1 may be a frustum with a small top and a large bottom, and the diameter of the upper end of the top of the rotating disc 1 is generally equal to the diameter of the stirring shaft 3.

Further, as shown in fig. 2, in the present embodiment, a spacer 8 is interposed between an end surface of the stirring shaft 3 close to the rotating disk 1 and a top end surface of the rotating disk 1. For the purpose of sanitation, a gasket 8 is added on the contact surface of the rotating disc 1 and the stirring shaft 3, wherein the gasket 8 can be a flat polytetrafluoroethylene gasket or the like.

The invention also provides a stirring tank, which comprises the sanitary in-tank stirring shaft anti-shaking device, and specifically, the stirring tank can be a bioreactor, a fermentation tank, a liquid preparation stirring tank and the like.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sanitary in-tank stirring shaft anti-shaking device is characterized by comprising a rotary disc, a fixed disc, a stirring shaft, a first magnet and a second magnet;

2. The sanitary in-tank mixer shaft anti-whipping device of claim 1, wherein said first magnet is disposed inside said turntable and said second magnet is disposed inside said fixed plate.

3. The sanitary in-tank stirring shaft anti-shaking device as claimed in claim 1, wherein said first magnet and said second magnet are provided in plurality at regular intervals in the rotation direction of said stirring shaft, and a plurality of said first magnets are respectively opposed to a plurality of said second magnets one by one in the radial direction of said stirring shaft.

4. The sanitary in-tank agitator shaft anti-whipping device of claim 1, wherein said first magnet and said second magnet are magnetic strips arranged in a radial direction of said agitator shaft.

5. The sanitary in-tank mixer shaft anti-whipping device of claim 1, wherein said fixed plate is connected to said tank body by a support bracket.

6. The sanitary in-tank agitator shaft anti-whipping device of claim 1, wherein said fixed plate, said rotatable plate and said agitator shaft are coaxially disposed.

7. The sanitary in-tank stirring shaft anti-shaking device as claimed in claim 1, wherein said first magnet is disposed at the bottom of said rotating disc, the bottom of said rotating disc being cylindrically disposed;

8. The sanitary in-tank stirring shaft anti-shaking device as claimed in claim 1, wherein the end surface of the stirring shaft close to the rotating disc is provided with a threaded hole, and the top end surface of the rotating disc is provided with a threaded column in threaded fit with the threaded hole.

9. The sanitary in-tank stirring shaft anti-shaking device as claimed in claim 8, wherein a gasket is sandwiched between the end surface of the stirring shaft close to the rotating disc and the top end surface of the rotating disc.

10. An agitator tank, comprising a sanitary in-tank agitator shaft anti-whipping device as defined in any one of claims 1 to 9.