CN116173775A

CN116173775A - Raw material mixer

Info

Publication number: CN116173775A
Application number: CN202310241106.XA
Authority: CN
Inventors: 童亮; 宣玉娜; 李娜; 李卫伟; 张宁; 魏莎莎; 姜帅; 耿新豪; 王瑾; 杨帆; 乔长晟; 盖丽丰
Original assignee: Tianjin Peiyang Biotrans Biotech Co Ltd
Current assignee: Tianjin Peiyang Biotrans Biotech Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-05-30

Abstract

The present invention provides a raw material mixer, comprising: the stirring device comprises a tank body, a driving motor, a transmission shaft, a stirring piece, an electric heating element and a feeding mechanism; the transmission shaft is rotatably arranged in the tank body, and one end of the transmission shaft extends out of the tank body and is connected with a power output shaft of the driving motor; the stirring pieces are arranged on the transmission shaft and are used for stirring materials in the tank body; the transmission shaft is hollow, and the electric heating element is arranged in the hollow of the transmission shaft; the stirring piece is made of heat conducting materials, the inner side end of the stirring piece is connected with the electric heating element, or a heat conducting structure is arranged on the stirring piece and used for conducting heat to materials, and the materials are heated in the stirring process. In the chemical raw material mixing process or the biological fermentation process, when heating is needed, the driving motor drives the stirring piece to stir the materials, and the electric heating element heats the materials, so that good working temperature is maintained, and the heating effect is uniform, direct and high in efficiency.

Description

Raw material mixer

Technical Field

The invention relates to the technical field of mixing of biological fermentation raw materials or chemical raw materials, in particular to a raw material mixer for mixed fermentation of raw materials in a biological fermentation process.

Background

At present, biological fermentation engineering is an important component of biological engineering, and microorganisms utilize carbohydrate fermentation to produce various industrial solvents and chemical raw materials. Ethanol, acetone-butanol, butanol-isopropanol, acetone-ethanol, 2, 3-butanediol and glycerol fermentation are products of solvent fermentation by microorganisms, and are also important production materials in the chemical industry field at present.

In general, in a biological fermentation process, an appropriate environmental temperature needs to be maintained so as to create an appropriate growth environment for microorganisms, and in order to make the fermentation process more sufficient and uniform, mixing and stirring are required periodically or continuously during the fermentation process.

The current heating method of the equipment generally heats the bottom or one side of the container, so that the internal and external heating of the raw materials is uneven, and the fermentation efficiency and uniformity are affected. In the middle stirring process, manual stirring is often utilized, time and labor are wasted, and meanwhile, the production cost is increased.

And, before or during fermentation, it is necessary to add different kinds of raw materials and to mix the various raw materials together sufficiently and uniformly. For example, in the case of producing glutamic acid (e.g., γ -polyglutamic acid) using a strain, it is necessary to add an auxiliary raw material such as leucine during fermentation, and conventional mixing equipment is inefficient and has poor uniformity, and it is impossible to add and stir the auxiliary raw material at any time during fermentation.

In the mixing and stirring process of other chemical raw materials, an appropriate working temperature is often required, so that other heating equipment has to be configured to ensure a set stirring temperature, thereby bringing additional production cost and low efficiency.

Disclosure of Invention

The invention aims to provide a raw material mixer so as to solve at least one technical problem existing in the prior art.

In order to solve the technical problems, the invention provides a raw material mixer, comprising: a tank body (such as a fermentation tank or a cylindrical body), a driving motor, a transmission shaft, a stirring piece, an electric heating element and a feeding mechanism;

the transmission shaft is rotatably arranged in the tank body, and one end of the transmission shaft is connected with a power output shaft of the driving motor;

the stirring pieces are arranged on the transmission shaft and are used for stirring materials in the tank body;

the transmission shaft is internally hollow, and the electric heating element is arranged in the hollow of the transmission shaft;

the stirring piece is made of a heat-conducting material, the inner side end of the stirring piece is connected with the electric heating element, or a heat-conducting structure is arranged on the stirring piece and used for conducting heat to the material so as to heat the material in the stirring process;

the feeding mechanism comprises a flow distribution disc and a discharging cylinder; a containing cavity is arranged in the flow distribution disc, and a flow passage is arranged in the discharging barrel;

the flow distribution disc is arranged at the top of the transmission shaft; the discharging cylinder is vertically arranged in the tank body, and the top of the discharging cylinder is fixedly connected with the flow distribution disc; the flow channel in the discharging cylinder is communicated with the accommodating cavity in the flow distribution disc; the material in the flow distribution disc accommodating cavity sequentially flows into the tank body through the flow passage and the discharge holes.

Further, a cavity is formed in the stirring piece, a heat conducting piece made of a heat conducting material is arranged in the cavity, and the inner side end of the heat conducting piece stretches into the cavity of the transmission shaft to be connected with the electric heating element.

Further, the stirring device also comprises a heat conducting sheet made of a heat conducting material, wherein a plurality of heat conducting sheets are inserted on the stirring piece, and one end of each heat conducting sheet is connected with the heat conducting piece and used for conducting out heat. The other end of the heat conducting fin protrudes out of the surface of the stirring piece.

Further, in the longitudinal direction of the heat conductive member, a plurality of the heat conductive sheets are arranged at intervals.

Further, the heat conductive sheets are uniformly arranged in the circumferential direction of the heat conductive member.

Further, the stirring piece is a stirring blade or a stirring rod.

The heat conducting piece can be arranged in a rod body shape or a sheet shape according to the shape of the stirring piece and the cross section shape of the cavity.

Wherein, the tank body can be a fermentation tank for biological fermentation or a cylindrical body for mixing other chemical raw materials.

Further, the driving motor is arranged at the bottom of the tank body. The transmission shaft is vertically arranged in the tank body.

Further, in the radial direction of the transmission shaft, the discharge hole is formed in the outer side end face of the discharge cylinder, and when the device works, materials are thrown out of the discharge hole under the action of centrifugal force.

Further, a plurality of the discharging holes are distributed at intervals in the height direction.

Further, in the circumferential direction of the transmission shaft, a plurality of groups of stirring pieces are distributed at intervals;

in the axial direction (height direction) of the transmission shaft, a plurality of stirring elements are arranged at intervals.

Further, in the circumferential direction of the transmission shaft and the diverter tray, a plurality of discharging cylinders are arranged at intervals.

Further, in a projection plane perpendicular to the drive shaft, and in a circumferential direction of the drive shaft, the tapping cylinder is disposed between two (or two rows) of adjacent stirring pieces.

Further, in the radial direction of the transmission shaft (or the tank body), the discharging cylinder is arranged in the middle of the tank body.

Further, the device also comprises a feeding hopper, the whole feeding hopper is in a horn mouth shape, the feeding hopper is fixedly arranged above the tank body (through a fixing frame), a feeding hole is arranged above the feeding hopper, and a discharging hole is arranged at the bottom of the feeding hopper; the material inlet is formed in the top of the flow distribution disc, the material outlet and the material inlet are arranged up and down relatively, and the material poured into the feed hopper flows into the accommodating cavity in the flow distribution disc through the material outlet and the material inlet.

Further, the diverter tray is disposed within the canister; and the feeding pipe is further arranged, the lower end of the feeding pipe is fixedly connected with the material inlet of the flow distribution plate, and the upper end of the feeding pipe is communicated with the discharge port of the feeding hopper. Wherein, the inlet pipe rotates along with the flow distribution plate.

Preferably, a sealing bearing is arranged between the upper end of the feeding pipe and the discharge port of the feeding hopper and used for blocking a gap between the feeding pipe and the discharge port of the feeding hopper;

a sealing bearing is arranged between the feed pipe and the opening of the tank body; is used for blocking the gap between the feeding pipe and the opening of the tank body.

By adopting the technical scheme, the invention has the following beneficial effects:

the raw material mixer provided by the invention has the advantages that in the chemical raw material mixing process or the biological fermentation process, when heating is needed, the driving motor drives the stirring piece to stir the materials, and meanwhile, the electric heating element is used for heating the materials, so that good working temperature is maintained, and the heating effect is uniform, direct and high in efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a raw material mixer according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the driving shaft and the stirring member in embodiment 1;

FIG. 3 is a schematic view of the stirring member of FIG. 2 shown in a broken away configuration;

FIG. 4 is a schematic structural view of a feeding mechanism in embodiment 2 of the present invention;

FIG. 5 is a schematic illustration of the diverter tray shown in FIG. 4 in a cut-away configuration;

fig. 6 is a mounting structure diagram of a control cover plate in embodiment 3;

FIG. 7 is a schematic view of the control cover plate of FIG. 6 partially broken away;

fig. 8 is a schematic diagram of the operation of the raw material mixer provided in example 4 of the present invention.

Reference numerals:

1-a drive motor; 2-an electrical heating element; 10-a tank body; 11-a fixing frame; 20-a transmission shaft; 21-speed limiting clutch; 30-stirring piece; 31-a heat conducting member; 32-a heat conductive sheet; 40-a feeding mechanism; 41-a diverter tray; 42-a discharging cylinder; 42 a-a discharge hole; 42 b-guide card slot; 43-control cover plate; 43 a-plug; 44-feeding hopper; 45-feeding pipe; 46-a flow guide pipe; 47-return spring; 48-balancing weight; 49-guide bar.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The invention is further illustrated with reference to specific embodiments.

Example 1

As shown in fig. 1, the raw material mixer provided in this embodiment includes: a tank 10 (such as a fermenter or a cylinder), a driving motor 1, a transmission shaft 20, a stirring member 30, and an electric heating element 2; the transmission shaft 20 is rotatably arranged in the tank body 10, and one end of the transmission shaft 20 is connected with a power output shaft of the driving motor 1; a plurality of stirring pieces 30 are arranged on the transmission shaft 20 and are used for stirring materials in the tank body 10; the transmission shaft 20 is arranged in a hollow way, and the electric heating element 2 is arranged in the hollow of the transmission shaft 20; the stirring piece 30 is made of a heat conducting material, the inner side end of the stirring piece 30 is connected with the electric heating element 2, or a heat conducting structure is arranged on the stirring piece 30 and used for conducting heat to materials, and the materials are heated in the stirring process.

As shown in fig. 2 and 3, the stirring member 30 is provided with a cavity, a heat conducting member 31 made of a heat conducting material is provided in the cavity, and the inner end of the heat conducting member 31 extends into the cavity of the transmission shaft 20 to be connected with the electric heating element 2. More preferably, the stirring device further comprises a heat conducting sheet 32 made of a heat conducting material, wherein a plurality of heat conducting sheets 32 are inserted on the stirring piece 30, one end of the heat conducting sheet 32 is connected with the heat conducting piece 31, and the other end of the heat conducting sheet 32 extends out of the stirring piece 30 for conducting heat. The plurality of heat conductive sheets 32 are arranged at intervals in the longitudinal direction of the heat conductive member 31. The heat conductive sheets 32 are uniformly arranged in the circumferential direction of the heat conductive member 31.

Further, in the circumferential direction of the transmission shaft 20, a plurality of the stirring members 30 are arranged at intervals; in the axial direction (height direction) of the drive shaft 20, a plurality of the stirring members 30 are arranged at intervals.

Wherein the stirring member 30 is a stirring blade or a stirring rod. The heat conductive member 31 may be provided in a rod shape or a sheet shape according to the shape of the stirring member 30 and the sectional shape of the cavity.

The tank 10 may be a fermenter for biological fermentation or a cylinder for mixing other chemical materials.

In this embodiment, the driving motor 1 is disposed at the bottom of the tank 10. The transmission shaft 20 is vertically arranged in the tank body 10.

In the chemical raw material mixing process or the biological fermentation process, when heating is needed, the driving motor 1 drives the stirring piece 30 to stir the materials, and the electric heating element 2 heats the materials, so that good working temperature is maintained, and the heating effect is uniform, direct and high in efficiency.

Example 2

This embodiment is substantially the same as embodiment 1 except that:

as shown in fig. 1 and fig. 4 to 5, the raw material mixer provided in this embodiment further includes a feeding mechanism 40, and the feeding mechanism 40 includes a diverter tray 41 and a discharge barrel 42; a containing cavity is arranged in the flow distribution disc 41, and a flow passage is arranged in the discharging barrel 42;

the diverter disc 41 is relatively fixedly arranged on the top of the transmission shaft 20; the discharging cylinder 42 is vertically arranged in the tank body 10, and the top of the discharging cylinder 42 is fixedly connected with the flow distribution disc 41; the flow channel in the discharging cylinder 42 is communicated with the accommodating cavity in the flow dividing disc 41; the discharge cylinder 42 is provided with a plurality of discharge holes 42a, a plurality of the discharge holes 42a are distributed at intervals in the height direction, the discharge holes 42a are communicated with the flow passage, and materials in the accommodating cavity of the flow distribution plate 41 flow into the tank body 10 sequentially through the flow passage and the discharge holes 42a. In this embodiment, the diverter tray 41 receiving chamber communicates with the flow path of the take-off cylinder 42 through a draft tube 46. The tapping column 42 and the drive shaft 20 and/or the diverter tray 41 may also be provided with spoke-like connectors to increase the strength of the connection.

More preferably, the discharge hole 42a is provided on an outer end surface of the discharge cylinder 42 in a radial direction of the transmission shaft 20, and in operation, the material is thrown out of the discharge hole 42a by centrifugal force.

In the circumferential direction of the drive shaft 20 and the diverter tray 41, a plurality of tapping cylinders 42 are arranged at intervals. The tapping cylinder 42 may be disposed between two (or two rows) of adjacent stirring members 30 in a projection plane perpendicular to the drive shaft 20 and in a circumferential direction of the drive shaft 20. The cross section of the discharging cylinder 42 is a fan-shaped platform. In the radial direction of the driving shaft 20 (or the can 10), the discharging cylinder 42 is disposed at the middle of the can 10, so that the material added later is transferred to the inside of the previous material, and then all the material is uniformly distributed by the rotation of the stirring member 30.

In another embodiment, the discharging cylinder 42 is arranged outside the stirring element 30 in the radial direction of the transmission shaft 20 (or the tank body 10), so that the arrangement mode is simpler, and the discharging cylinder 42 and the stirring element 30 can be arranged in a relatively rotating way, thereby being more flexible.

The embodiment further comprises a feeding hopper 44, wherein the whole feeding hopper 44 is in a horn mouth shape, the feeding hopper 44 is fixedly arranged above the tank body 10 through a fixing frame 11, a feeding hole is formed in the upper part of the feeding hopper 44, and a discharging hole is formed in the bottom of the feeding hopper; the top of the flow distribution disc 41 is provided with a material inlet, a discharge hole of the feed hopper 44 and the material inlet are arranged up and down oppositely, and the material poured into the feed hopper 44 flows into a containing cavity in the flow distribution disc 41 through the discharge hole and the material inlet.

In this embodiment, the diverter tray 41 is disposed within the tank 10; and the feeding pipe 45 is further included, the lower end of the feeding pipe 45 is fixedly connected with the material inlet of the diverter tray 41, and the upper end of the feeding pipe 45 is communicated with the discharge hole of the feed hopper 44. The feed tube 45 rotates with the diverter tray 41.

Preferably, a sealing bearing is arranged between the upper end of the feeding pipe 45 and the discharging hole of the feeding hopper 44; a sealing bearing is arranged between the feed pipe 45 and the opening of the tank body 10, and is used for simultaneously blocking the gap between the feed pipe 45 and the opening of the tank body 10 and the discharge hole of the feed hopper 44. The feed hopper 44, the accommodating chamber of the diverter tray 41 and the flow path in the discharge barrel 42 form a material conveying path from the outside of the tank 10 to the inside of the tank 10.

The materials of the embodiment are mixed more uniformly, and the mixing efficiency is greatly improved.

Example 3

This embodiment is substantially the same as embodiment 2 except that:

as shown in fig. 1 to 7, the raw material mixer disclosed in this embodiment is further provided with a control cover plate 43 in the tank 10; the control cover plate 43 is arranged on the outer side of the discharging cylinder 42 in a relatively movable manner in the radial direction of the transmission shaft 20, a plug 43a is arranged on one side of the discharging cylinder 42 in the control cover plate 43, and the plug 43a is matched with the discharging hole 42a and used for plugging the discharging hole 42a;

the present embodiment further comprises a return spring 47, said return spring 47 being arranged between said control cover 43 and said tapping column 42, said return spring 47 tending to force said control cover 43 to approach said tapping column 42, thereby causing the plug 43a to be inserted into the tapping hole 42a and thereby to close said tapping hole 42a. The return spring 47 in this embodiment is an arc-shaped or bow spring.

When the transmission shaft 20 and the stirring piece 30 are stationary, under the action of the reset spring 47, the plug 43a is inserted into the discharge hole 42a to block the discharge hole 42a, so as to further block the material input channels from the feed hopper 44, the flow distribution disc 41 and the discharge cylinder 42, thereby realizing the sealing of the tank body 10 and being beneficial to forming a closed environment suitable for biological fermentation.

In the fermentation process, the electric heating element 2 can be started to heat the materials according to the requirement, and the good working temperature is kept.

And when stirring is needed, the tank body 10 does not need to be started, the driving motor 1 is started, the driving motor 1 drives the stirring piece 30 and the discharging barrel 42 to rotate at a low speed through the transmission shaft 20, the centrifugal force is smaller than the elastic force of the reset spring 47, and the plug 43a always seals the material conveying channel in the stirring process, so that a sealed working environment is maintained.

In the fermentation process or other working processes, when auxiliary raw materials are required to be added, the auxiliary raw materials are poured into the feed hopper 44, the driving motor 1 is started, the driving motor 1 drives the stirring piece 30 and the discharge cylinder 42 to rotate through the transmission shaft 20, when the rotating speed exceeds a set value, the centrifugal force is larger than the elastic force of the reset spring 47, the cover plate 43 is controlled to move outwards along the radial direction under the action of the centrifugal force, the plug 43a is separated from the discharge hole 42a, the blocking of a material conveying channel is relieved, and the auxiliary raw materials flow into the tank body 10 from the conveying channel.

More preferably, the device further comprises a balancing weight 48, wherein the balancing weight 48 is fixedly connected with the control cover plate 43; thereby improving the stability of the whole control system.

Preferably, the discharging cylinder 42 is provided with a guiding slot 42b, and the guiding slot 42b is arranged along the radial direction of the transmission shaft 20; the control cover 43 is connected to the guide locking groove 42b via a guide rod 49. Specifically, the guide rod 49 is slidably inserted into the guide slot 42b, and one end of the guide rod 49 is fixedly connected with the control cover 43; the other end of the guide rod 49 is provided with a limit table to prevent the guide rod 49 from being completely separated from the guide clamping groove 42b under the centrifugal force. Alternatively, the return spring 47 rests with one end on the stop and with the other end on said tapping cylinder 42, the return spring 47, after being compressed, tending to control the closing plate 43 to force it close to the tapping cylinder 42.

In the height direction, a group of guiding and limiting structures consisting of a guiding clamping groove 42b and a guiding rod 49 are respectively arranged at the top and the bottom of the discharging cylinder 42.

Preferably, the weight 48 is fixedly disposed at the other end of the guide rod 49, and functions as the above-mentioned limit table.

Example 4

This embodiment is substantially the same as embodiment 3 except that:

in this embodiment, as shown in fig. 8, the discharge cylinder 42 is disposed outside the stirring member 30 in the radial direction of the transmission shaft 20 (or the can 10).

The diverter disc 41 is connected with the transmission shaft 20 through the speed limiting clutch 21, namely, two ends of the speed limiting clutch 21 are respectively connected with the diverter disc 41 and the transmission shaft 20; the speed limiting clutch 21 is in an engaged state when the rotational speed of the propeller shaft 20 is lower than a defined speed, and the speed limiting clutch 21 is in a disengaged state when the rotational speed of the propeller shaft 20 is equal to or higher than the defined speed. The speed limiting clutch 21 is a prior art and will not be described in detail herein.

When the rotating speed of the transmission shaft 20 is lower than the limiting speed, the speed limiting clutch 21 is in a combined state, and the transmission shaft 20 drives the flow dividing disc 41, the discharging cylinder 42 and the stirring piece 30 to synchronously rotate; when the material conveying channel is required to be sealed and materials are stirred at a high speed in a relatively airtight environment, the driving motor 1 drives the transmission shaft 20 to rotate at a high speed, and after the rotation speed of the transmission shaft 20 is equal to or higher than a limiting speed, the transmission shaft 20 is separated from the flow distribution disc 41, and at the moment, the transmission shaft 20 only drives the stirring piece 30 to rotate, so that the materials are fully stirred. Meanwhile, as the flow distribution disc 41 and the discharging barrel 42 are in a static state or rotate at a low speed, the control cover plate 43 is close to the discharging barrel 42 under the action of the reset spring 47, the plug 43a seals the discharging hole 42a, so that a material conveying channel is sealed, and the sealing environment of the tank body 10 is ensured.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A raw material mixer, comprising: the stirring device comprises a tank body, a driving motor, a transmission shaft, a stirring piece, an electric heating element and a feeding mechanism;

2. The raw material mixer according to claim 1, wherein a cavity is provided in the stirring member, a heat conducting member made of a heat conducting material is provided in the cavity, and an inner side end of the heat conducting member extends into the cavity of the transmission shaft to be connected with the electric heating element.

3. The raw material mixer according to claim 2, further comprising a heat conductive sheet made of a heat conductive material, a plurality of heat conductive sheets being inserted on the stirring member, one end of the heat conductive sheet being connected to the heat conductive member for conducting out heat.

4. The raw material mixer according to claim 3, wherein a plurality of the heat conductive sheets are arranged at intervals in a length direction of the heat conductive member.

5. The raw material mixer according to claim 1, wherein the stirring member is a stirring blade or a stirring rod.

6. The raw material mixer of claim 1, wherein the drive motor is disposed at the bottom of the tank; the transmission shaft is vertically arranged in the tank body.

7. The material mixer according to claim 1, wherein the discharge opening is provided on an outer end face of the discharge cylinder in a radial direction of the drive shaft, and wherein the material is thrown out of the discharge opening by centrifugal force in operation.

8. The raw material mixer according to claim 1, wherein a plurality of the discharge holes are arranged at intervals in a height direction.

9. The material mixer of claim 1, wherein a plurality of sets of said stirring elements are arranged at intervals in the circumferential direction of said drive shaft; in the axial direction of the transmission shaft, a plurality of stirring pieces are distributed at intervals.

10. The material mixer of claim 1, wherein a plurality of the discharge barrels are arranged at intervals in a circumferential direction of the drive shaft and the diverter tray.