CN216677783U

CN216677783U - Multidirectional spiral stirring paddle and stirring device

Info

Publication number: CN216677783U
Application number: CN202122081174.3U
Authority: CN
Inventors: 郭敏; 李克绪; 于雪
Original assignee: Kangma Healthcode Shanghai Biotech Co Ltd
Current assignee: Yanshimei Society Hainan Medical Beauty Health Technology Co ltd; Kangma Healthcode Shanghai Biotech Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-06-07
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a multidirectional spiral stirring paddle and a stirring device. The utility model can effectively eliminate the dead zone of the flow, improve the uniformity of the temperature field, prevent the inactivation of cells caused by local overheating, comprehensively improve the heat utilization efficiency and the cell activity of the fermentation tank, shorten the reaction time while improving the stirring efficiency, and improve the yield and the quality of finished products. The utility model can be used for biological fermentation process.

Description

Multidirectional spiral stirring paddle and stirring device

Technical Field

The utility model belongs to the field of fermentation equipment, and particularly relates to a multidirectional spiral stirring paddle and a stirring device.

Background

In the production of biological products, the primary factor affecting the quality of the product is the fermenter, and the paddles are an important component of the fermenter. The existing stirring paddle has the following main defects: 1. has larger shearing force, and leads the loss of the biological fine particles to be larger. 2. Dead zones exist in the flow of liquid flow formed by stirring, the thermal field is not uniform, and local overheating causes deactivation. 3. Foams are easy to generate in the stirring process, and accurate monitoring of parameters such as liquid level and the like is not facilitated. 4. The stirring efficiency and the energy consumption have the problems of high efficiency and high energy consumption, and the high efficiency and the low energy consumption cannot be compatible with each other, which is a technical problem which cannot be overcome in the industry all the time.

In addition, the stirring paddle with the existing structure is easy to loose connection between the stirring shaft and the power shaft in the long-time high-speed rotation process, and the normal work of the stirring paddle is seriously influenced.

Disclosure of Invention

The utility model aims to provide a multidirectional helical stirring paddle to solve the defects in the background technology.

In order to achieve the above object, in a first aspect, the present invention provides a multi-directional helical stirring paddle, including a stirring shaft, around which a plurality of helical blades with different rotation directions are fixedly arranged from top to bottom.

Furthermore, each spiral blade is evenly distributed in the circumferential direction.

Furthermore, at least one supporting rod is fixed on the stirring shaft in a crossed manner, and each spiral blade is fixed on the supporting rod respectively.

Further, the plurality of helical blades with different rotation directions at least comprise a first helical blade with a first rotation direction, a second helical blade with a first rotation direction, a first helical blade with a second rotation direction and a second helical blade with a second rotation direction; the first spiral blade in the first rotation direction and the second spiral blade in the first rotation direction form a forward spiral blade group, and the first spiral blade in the second rotation direction and the second spiral blade in the second rotation direction form a reverse spiral blade group.

Further, each of the screw-type blades has a mirror-finished surface.

Further, the edge of each spiral blade has a round corner structure.

Furthermore, the upper end of the stirring shaft is detachably connected with the power shaft through a self-made coupler.

Furthermore, the inner wall of the shaft hole of the coupler is axially provided with at least one limiting groove, the peripheral wall of the upper end of the stirring shaft is axially provided with at least one positioning rib, and the positioning ribs and the limiting grooves are in one-to-one correspondence assembly relation.

Furthermore, at least one through hole is radially formed in the peripheral wall of the upper end of the stirring shaft, at least one pair of coaxial fixing holes are formed in the peripheral wall of the coupler, and a bolt sequentially penetrates through one fixing hole, the through hole and the other fixing hole and then fixes the stirring shaft and the coupler into a whole through a nut.

In a second aspect, the utility model provides a stirring device, which comprises the multidirectional spiral stirring paddle and a motor in any technical scheme of the first aspect; and a stirring shaft of the multidirectional spiral stirring paddle is connected to an output shaft of the motor.

Compared with the prior art, the utility model has the beneficial effects that: effectively eliminating the flowing dead zone, improving the uniformity of the temperature field, preventing the inactivation of cells caused by local overheating, comprehensively improving the heat utilization efficiency and the cell activity of the fermentation tank, shortening the reaction time while improving the stirring efficiency, and improving the yield and the quality of finished products. The utility model can be used for biological fermentation process.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a stirring paddle according to the present invention;

FIG. 2 is a schematic structural view of one embodiment of a stirring paddle according to the present invention;

FIG. 3 is an exploded view of the assembly of the stirring shaft and the coupling in one embodiment of the stirring paddle of the present invention;

FIG. 4 is a schematic view of an assembly structure of a coupling and a bolt in an embodiment of the stirring paddle of the present invention;

FIG. 5 is a cross-sectional view of the assembly of the agitator shaft and the shaft coupling in an embodiment of the agitator paddle of the present invention;

FIG. 6 is a schematic structural view of an embodiment of the stirring device of the present invention.

Reference numbers in the figures: the device comprises a stirring shaft 1, a positioning rib 11, a through hole 12, a supporting rod 2, a first spiral blade 31 in a first rotation direction, a second spiral blade 32 in the first rotation direction, a first spiral blade 41 in a second rotation direction, a second spiral blade 42 in the second rotation direction, a flange plate 5, a power shaft 6, a motor 7, a coupler 8, a shaft hole 81, a limiting groove 82, a fixing hole 83, a bolt 9 and a nut 91.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the utility model without making any creative effort, belong to the protection scope of the utility model.

As shown in fig. 1, an embodiment of the multi-directional helical stirring paddle of the present invention includes a stirring shaft 1, and a plurality of helical blades with different rotation directions are fixedly arranged around the stirring shaft 1 from top to bottom. The spiral direction is spiral direction from bottom to top, and different spiral directions are under the condition of not considering paddle overall arrangement position on (mixing) shaft 1, and the helical structure of each screw-tupe paddle itself is different, and the concrete trend that shows up from bottom to top in the spiral is different, and other parameters, such as pitch (pitch itself can be adjusted according to the nature of being stirred the material) and from bottom to top's overall height etc. can all be the same. The stirring surface of the spiral blade is an inclined surface relative to the horizontal plane and the vertical plane, and the size of the inclination angle can be adjusted as required, for example, the specific inclination angle design can be carried out according to parameters such as properties, density and the like of the material to be stirred. The number of the screw type blades can be increased or decreased according to the type of the materials to be stirred. The helical blades can be paired for use, for example, one pair of the blades has the same first rotation direction, the other pair has the same second rotation direction, and the like, and the helical blades with different rotation directions can be arranged at intervals or continuously. During stirring, the different gyre of screw-type paddle can produce the effort of equidirectional to the material being stirred, thereby make the mixture that is stirred both flow along with the rotation of screw-type paddle, still in the flow in-process by the downward infiltration of equidirectional effort formation vortex and upwards roll and form the torrent, form the turbulent flow after the liquid stream collision of different nature, help smashing the foam or the bubble that form in the stirring process and eliminate, and make different kinds of material fully contact in the mixture, effectively eliminate the dead zone of flow, improve the homogeneity of temperature field, prevent that local overheat from making cell inactivation, the heat utilization efficiency and the cell activity of comprehensive improvement fermentation cylinder, can shorten reaction time when promoting stirring efficiency, improve finished product yield and quality. The stirring surface of the screw type blade can be a plane or a curved surface. When curved, it is preferably a streamlined curved surface having a uniform radius of curvature.

In one embodiment, each of the propeller blades is circumferentially equispaced. The plurality of spiral blades are uniformly distributed along the circumferential direction of the stirring shaft 1 at equal intervals, so that stable liquid flow is formed, the stirring resistance is reduced, and the energy is saved.

In one embodiment, at least one support rod 2 is fixed on the stirring shaft 1 in a crossing manner, and each helical blade is fixed on the support rod 2. As shown in fig. 1, four support rods 2 are sequentially welded on the stirring shaft 1 from top to bottom, wherein the three support rods 2 on the upper side are parallel to each other, and the support rod 2 on the lowest side is perpendicular to the other three support rods. Of course, the four support rods 2 may be arranged in other manners, and the number of the support rods 2 may be increased or decreased as required, so as to provide convenience for fixing the screw-type blade to the maximum extent and improve the fixing stability as a standard. Each spiral blade is provided with a plurality of points which are fixed with different supporting rods 2, so that the fixed firm degree is ensured, and the continuous stirring resistance is prevented from being separated from the supporting rods 2 in the rapid stirring process. On the other hand, compared with a mode of randomly selecting a welding point and fixing the stirring shaft 1 in the height direction of the spiral blades, the mode of arranging the plurality of supporting rods 2 with determined positions and quantity and fixing each spiral blade and each supporting rod 2 respectively ensures that the positions of the welding fixing points of each spiral blade are kept consistent in the height direction, so that the stress is more uniform, unexpected structural deformation caused by uneven stress cannot occur, and the long-term stability and reliability of the integral structure are favorably maintained.

In one embodiment, as shown in fig. 1 and 2, the plurality of different-handed screw-type blades includes at least a first screw-type blade 31 of a first handed screw-type, a second screw-type blade 32 of the first handed screw-type, a first screw-type blade 41 of a second handed screw-type, and a second screw-type blade 42 of the second handed screw-type; the first propeller blade 31 and the second propeller blade 32 in the first rotation direction constitute a forward propeller blade group, and the first propeller blade 41 and the second propeller blade 42 in the second rotation direction constitute a reverse propeller blade group. As can be seen from fig. 1 and 2, the spiral blades with different rotation directions are arranged at intervals, and when viewed from the counterclockwise direction, the first spiral blade 31 with the first rotation direction, the first spiral blade 41 with the second rotation direction, the second spiral blade 32 with the first rotation direction, and the second spiral blade 42 with the second rotation direction are arranged in sequence, wherein the first spiral blade 31 and the second spiral blade 32 with the first rotation direction form one group, and the first spiral blade 41 with the second rotation direction and the second spiral blade 42 with the second rotation direction form another group. The two groups of spiral blades with the opposite rotation directions are four blades and are arranged around the stirring shaft 1 at intervals of 90 degrees. The forward spiral type blade applies downward pressure to the stirred mixture to form vortex, the reverse spiral type blade applies lifting force to the stirred mixture to form turbulent flow, and the vortex and the turbulent flow form turbulent flow after collision, so that heterogeneous materials in the turbulent flow can be contacted and reacted more uniformly, and the stirring effect is improved.

In one embodiment, each of the propeller-type blades has a mirror-finished surface. The smooth surface can reduce the shearing force of the spiral blade to living cells in the mixture, reduce the physical damage to biological fine particles such as cells and the like in the stirring process and is beneficial to maintaining the biological activity of the mixture after stirring.

In one embodiment, the edge of each of the propeller blades has a rounded structure and is polished. Such rounded corners may further reduce the shear force of the screw-type blades on living cells in the agitated mixture.

In one embodiment, as shown in fig. 3-5, the upper end of the mixing shaft 1 is detachably connected to the power shaft 6 by a self-made coupling 8. Specifically, the inner wall of the shaft hole 81 of the coupler 8 is axially provided with at least one limiting groove 82, the circumferential wall of the upper end of the stirring shaft 1 is axially provided with at least one positioning rib 11, and the positioning ribs 11 and the limiting grooves 82 have a one-to-one corresponding assembly relationship. The circumferential wall of the upper end of the stirring shaft 1 is radially provided with at least one through hole 12, the circumferential wall of the coupler 8 is provided with at least one pair of coaxial fixing holes 83, and the bolt 9 sequentially penetrates through one fixing hole 83, the through hole 12 and the other fixing hole 83 and then fixes the stirring shaft 1 and the coupler 8 into a whole through a nut 91. The detachable shaft coupling structure replaces the traditional flange connection structure based on the flange 5 in fig. 1, on one hand, the stirring paddle (hereinafter referred to as the stirring paddle) shown in fig. 1 is convenient to replace, and on the other hand, the connection between the stirring shaft 1 of the stirring paddle and the power shaft 6 is not easy to loosen through the position limiting structure of the positioning ribs 11 and the limiting grooves 82, so that the overall reliability is improved.

As shown in FIG. 6, one embodiment of the stirring apparatus for biological fermentation of the present invention comprises a stirring blade and a motor 7 as described in any one of the above embodiments of the multi-directional helical stirring blade; the stirring shaft 1 of the multi-directional spiral stirring paddle is connected to the output shaft of the motor 7 to provide power for the stirring paddle. The technical effect of the stirring paddle is also the technical effect of the stirring device, and the details are not described here.

The control software related to the utility model adopts the prior art.

Although a plurality of embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that a variety of changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multi-directional helical stirring paddle, characterized in that it comprises a stirring shaft (1) around which a plurality of helical paddles of different rotational directions are fixed from top to bottom.

2 . The multi-directional propeller agitating propeller according to claim 1 , wherein each of the propeller blades is uniformly distributed in the circumferential direction. 3 .

3. The multi-directional screw stirring propeller according to claim 1, characterized in that, at least one support rod (2) is fixed on the stirring shaft (1) intersecting with it, and each of the screw-type propellers is fixed on the on the support rod (2).

4. The multi-directional propeller agitating propeller according to claim 1, characterized in that, the plurality of spiral propellers with different rotation directions at least comprise a first spiral propeller (31) in a first rotation direction, a first spiral propeller in a first A second helical blade (32) in a rotation direction, a first helical blade (41) in a second rotation direction, and a second helical blade (42) in a second rotation direction; wherein the first helical blade (42) The first screw blade (31) in the first rotation direction and the second screw blade (32) in the first rotation direction constitute a forward screw blade group, and the first screw blade (41) in the second rotation direction ) and the second helical blade (42) in the second rotational direction to form a reverse helical blade group.

5 . The multi-directional propeller of claim 1 , wherein each of the helical blades has a mirror-polished surface. 6 .

6 . The multi-directional propeller stirring propeller according to claim 1 , wherein the edge of each of the spiral propellers has a rounded structure. 7 .

7 . The multi-directional propeller stirring propeller according to claim 1 , wherein the upper end of the stirring shaft ( 1 ) is detachably connected to the power shaft ( 6 ) through a self-made coupling ( 8 ). 8 .

8 . The multi-directional propeller agitating propeller according to claim 7 , wherein the inner wall of the shaft hole ( 81 ) of the coupling ( 8 ) is axially provided with at least one limiting groove ( 82 ), and the At least one positioning rib (11) is axially provided on the peripheral wall of the upper end of the stirring shaft (1), and the positioning rib (11) and the limiting groove (82) have a one-to-one corresponding assembly relationship.

9 . The multi-directional propeller stirring propeller according to claim 8 , wherein at least one through hole ( 12 ) is radially opened on the peripheral wall of the upper end of the stirring shaft ( 1 ). ) is provided with at least a pair of coaxial fixing holes (83) on the peripheral wall of the ) to fix the stirring shaft (1) and the coupling (8) into one.

10. A stirring device, characterized in that it comprises the multi-directional screw stirring paddle and the motor (7) according to any one of claims 1-9; the stirring shaft (1) of the multi-directional screw stirring paddle is connected to the the output shaft of the motor (7).