A raw material mixer

Abstract

The present invention provides a raw material mixer, which includes: a tank body, a driving motor, a transmission shaft, a stirring member, 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 to the power output shaft of the driving motor; a plurality of stirring members are arranged on the transmission shaft for stirring the materials in the tank body; the transmission shaft is hollow inside, and the electric heating element is arranged in the hollow of the transmission shaft; the stirring member is made of a heat-conducting material, the inner side end of the stirring member is connected to the electric heating element, or a heat-conducting structure is arranged on the stirring member for conducting heat to the materials to heat the materials during the stirring process. During the mixing process of chemical raw materials or during the biological fermentation process, when heating is required at the same time, the driving motor drives the stirring member to stir the materials, and at the same time the electric heating element heats the materials, maintaining a good working temperature, and the heating effect is uniform, direct and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of mixing of biological fermentation raw materials or chemical raw materials, and particularly relates to a raw material mixer for raw material mixed fermentation in the process of biological fermentation. Background Art

[0002] At present, biological fermentation engineering is an important part of biotechnology, and microorganisms use carbohydrates to ferment to produce various industrial solvents and chemical raw materials. Ethanol, acetone-butanol, butanol-isopropanol, acetone-ethanol, 2,3-butanediol, and glycerol fermentation are the products of microbial solvent fermentation and are also important production materials in the current chemical industry.

[0003] Generally, in the process of biological fermentation, it is necessary to maintain an appropriate environmental temperature to create a suitable growth environment for microorganisms. At the same time, in order to make the fermentation process more sufficient and uniform, it is necessary to perform mixing and stirring regularly or continuously during the fermentation process.

[0004] The current equipment heating method is usually to heat at the bottom or one side of the container, resulting in uneven heating of the raw materials inside and outside, thus affecting the fermentation efficiency and uniformity. During the intermediate stirring process, manual stirring is often used, which is time-consuming and laborious and increases the production cost at the same time.

[0005] In addition, before or during fermentation, different types of raw materials need to be added and multiple raw materials need to be fully and evenly mixed together. For example, when using strains to produce glutamic acid (such as γ-polyglutamic acid), auxiliary raw materials such as leucine need to be added during the fermentation process. The current mixing equipment has low efficiency and poor uniformity and cannot add and stir auxiliary raw materials at any time during the fermentation process.

[0006] During the mixing and stirring of other chemical raw materials, an appropriate working temperature is also often required, so other heating equipment has to be configured to ensure the set stirring temperature, which brings additional production costs and low efficiency. Summary of the Invention

[0007] The purpose of the present invention is to provide a raw material mixer to solve at least one of the above technical problems existing in the prior art.

[0008] To solve the above technical problems, a raw material mixer provided by the present invention includes: a tank body (such as a fermentation tank or a cylindrical body), a driving motor, a transmission shaft, a stirring member, an electric heating element, and a feeding mechanism;

[0009] The transmission shaft is rotatably arranged in the tank body, and one end of the transmission shaft is connected to the power output shaft of the driving motor;

[0010] A plurality of the stirring members are arranged on the transmission shaft and are used for stirring the materials in the tank;

[0011] The transmission shaft is hollow inside, and the electric heating element is arranged in the hollow of the transmission shaft;

[0012] The stirring member is made of a heat-conducting material. The inner end of the stirring member is connected to the electric heating element, or a heat-conducting structure is arranged on the stirring member for conducting heat to the materials, so as to heat the materials during the stirring process;

[0013] The feeding mechanism includes a shunt plate and a discharge cylinder; a receiving chamber is arranged inside the shunt plate, and a flow channel is arranged inside the discharge cylinder;

[0014] The shunt plate is arranged on the top of the transmission shaft; the discharge cylinder is vertically arranged in the tank, and the top of the discharge cylinder is fixedly connected to the shunt plate; the flow channel in the discharge cylinder is communicated with the receiving chamber in the shunt plate; a plurality of discharge holes are arranged on the discharge cylinder, and the discharge holes are communicated with the flow channel. The materials in the receiving chamber of the shunt plate flow into the tank through the flow channel and the discharge holes in sequence.

[0015] Further, a cavity is arranged inside the stirring member, and a heat-conducting member made of a heat-conducting material is arranged in the cavity. The inner end of the heat-conducting member extends into the hollow of the transmission shaft and is connected to the electric heating element.

[0016] Further, a heat-conducting sheet made of a heat-conducting material is also included. A plurality of heat-conducting sheets are inserted on the stirring member. One end of the heat-conducting sheet is connected to the heat-conducting member for conducting heat out. The other end of the heat-conducting sheet protrudes from the surface of the stirring member.

[0017] Further, in the length direction of the heat-conducting member, a plurality of the heat-conducting sheets are arranged at intervals.

[0018] Further, in the circumferential direction of the heat-conducting member, the heat-conducting sheets are arranged evenly.

[0019] Further, the stirring member is a stirring blade or a stirring rod.

[0020] Wherein, the heat-conducting member can be set to a rod shape or a sheet shape according to the shape of the stirring member and the cross-sectional shape of the cavity.

[0021] Wherein, the tank can be a fermentation tank for biological fermentation or a cylindrical body for mixing other chemical raw materials.

[0022] Further, the driving motor is arranged at the bottom of the tank. The transmission shaft is vertically arranged in the tank.

[0023] Further, in the radial direction of the transmission shaft, the discharge holes are arranged on the outer end face of the discharge cylinder. During operation, the material is thrown out of the discharge holes under the action of centrifugal force.

[0024] Further, a plurality of the discharge holes are arranged at intervals in the height direction.

[0025] Further, in the circumferential direction of the transmission shaft, multiple groups of the stirring members are arranged at intervals;

[0026] In the axial direction (height direction) of the transmission shaft, a plurality of the stirring members are arranged at intervals.

[0027] Further, in the circumferential direction of the transmission shaft and the shunt plate, a plurality of the discharge cylinders are arranged at intervals.

[0028] Further, in the projection plane perpendicular to the transmission shaft and in the circumferential direction of the transmission shaft, the discharge cylinder is arranged between two adjacent (or two rows of) the stirring members.

[0029] Further, in the radial direction of the transmission shaft (or the tank body), the discharge cylinder is arranged in the middle of the tank body.

[0030] Further, it further includes a feed hopper. The feed hopper is integrally in a flared shape. The feed hopper is fixedly arranged above the tank body (through a fixing frame). There is a feed inlet above the feed hopper and a discharge outlet at the bottom; a material inlet is arranged at the top of the shunt plate. The discharge outlet and the material inlet are arranged vertically opposite to each other. The material poured into the feed hopper flows into the accommodation chamber in the shunt plate through the discharge outlet and the material inlet.

[0031] Further, the shunt plate is arranged in the tank body; and, it further includes a feed pipe. The lower end of the feed pipe is fixedly connected to the material inlet of the shunt plate, and the upper end of the feed pipe is communicated with the discharge outlet of the feed hopper. Among them, the feed pipe rotates with the shunt plate.

[0032] Preferably, a sealing bearing is arranged between the upper end of the feed pipe and the discharge outlet of the feed hopper for blocking the gap between the feed pipe and the discharge outlet of the feed hopper;

[0033] A sealing bearing is arranged between the feed pipe and the opening of the tank body; for blocking the gap between the feed pipe and the opening of the tank body.

[0034] Adopting the above technical solutions, the present invention has the following beneficial effects:

[0035] A raw material mixer provided by the present invention, during the mixing process of chemical raw materials or in the biological fermentation process, when heating is required simultaneously, a driving motor drives a stirring member to stir the materials, and an electric heating element heats the materials to maintain a good working temperature, and the heating effect is uniform, direct and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic structural diagram of the raw material mixer provided by the embodiment of the present invention;

[0038] Figure 2 It is a schematic structural diagram of the transmission shaft and the stirring member in Embodiment 1;

[0039] Figure 3 For Figure 2 It is a schematic structural diagram of the stirring member after being cut open;

[0040] Figure 4 It is a schematic structural diagram of the feeding mechanism in Embodiment 2 of the present invention;

[0041] Figure 5 For Figure 4 It is a schematic structural diagram of the shunt plate after being cut open;

[0042] Figure 6 It is an installation structure diagram of the control cover plate in Embodiment 3;

[0043] Figure 7 For Figure 6 It is a schematic structural diagram of the control cover plate partially cut open;

[0044] Figure 8 It is a working principle diagram of the raw material mixer provided by Embodiment 4 of the present invention.

[0045] REFERENCE SIGNS:

[0046] 1 - driving motor; 2 - electric heating element; 10 - tank body; 11 - fixing frame; 20 - transmission shaft; 21 - speed limit clutch; 30 - stirring member; 31 - heat conducting member; 32 - heat conducting sheet; 40 - feeding mechanism; 41 - shunt plate; 42 - discharge cylinder; 42a - discharge hole; 42b - guiding card slot; 43 - control cover plate; 43a - plug; 44 - feed hopper; 45 - feed pipe; 46 - diversion pipe; 47 - return spring; 48 - counterweight; 49 - guiding rod. Detailed implementation manners

[0047] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] The present invention will be further explained and described below in conjunction with specific implementation manners.

[0051] Embodiment 1

[0052] As Figure 1 shown, a raw material mixer provided in this embodiment includes: a tank body 10 (such as a fermentation tank or a cylindrical body), 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 to the power output shaft of the driving motor 1; a plurality of the stirring members 30 are arranged on the transmission shaft 20 for stirring the materials in the tank body 10; the transmission shaft 20 is hollow inside, and the electric heating element 2 is arranged in the hollow of the transmission shaft 20; the stirring member 30 is made of a heat-conducting material, and the inner end of the stirring member 30 is connected to the electric heating element 2, or a heat-conducting structure is arranged on the stirring member 30 for conducting heat to the materials to heat the materials during the stirring process.

[0053] As Figure 2 and3 As shown, a cavity is provided in the stirring member 30, and a heat-conducting member 31 made of a heat-conducting material is provided in the cavity. The inner end of the heat-conducting member 31 extends into the hollow of the transmission shaft 20 and is connected to the electric heating element 2. More preferably, it also includes a heat-conducting sheet 32 made of a heat-conducting material, and multiple heat-conducting sheets 32 are inserted into the stirring member 30. One end of the heat-conducting sheet 32 is connected to the heat-conducting member 31, and the other end of the heat-conducting sheet 32 extends out of the stirring member 30 for conducting heat. In the longitudinal direction of the heat-conducting member 31, the multiple heat-conducting sheets 32 are arranged at intervals. In the circumferential direction of the heat-conducting member 31, the heat-conducting sheets 32 are evenly arranged.

[0054] Furthermore, in the circumferential direction of the transmission shaft 20 , a plurality of groups of the stirring members 30 are arranged at intervals; in the axial direction (height direction) of the transmission shaft 20 , a plurality of the stirring members 30 are arranged at intervals.

[0055] The stirring member 30 is a stirring blade or a stirring rod. The heat conducting member 31 can be configured as a rod or a sheet according to the shape of the stirring member 30 and the cross-sectional shape of the cavity.

[0056] The tank body 10 may be a fermentation tank for biological fermentation or a cylindrical body for mixing other chemical raw materials.

[0057] In this embodiment, the driving motor 1 is disposed at the bottom of the tank body 10 . The transmission shaft 20 is vertically disposed in the tank body 10 .

[0058] In the present invention, when heating is required during the mixing process of chemical raw materials or the biological fermentation process, the driving motor 1 drives the stirring member 30 to stir the materials, and the electric heating element 2 heats the materials to maintain a good working temperature, and the heating effect is uniform, direct and efficient.

[0059] Example 2

[0060] This embodiment is basically the same as embodiment 1, except that:

[0061] like Figure 1 and Figures 4-5 As shown, the raw material mixer provided in this embodiment further includes a feeding mechanism 40, which includes a diverter plate 41 and a discharge barrel 42; the diverter plate 41 is provided with a receiving chamber, and the discharge barrel 42 is provided with a flow channel;

[0062] The shunt plate 41 is relatively fixedly arranged on the top of the transmission shaft 20; the discharge cylinder 42 is vertically arranged in the tank body 10, and the top of the discharge cylinder 42 is fixedly connected with the shunt plate 41; the flow channel in the discharge cylinder 42 is communicated with the accommodation chamber in the shunt plate 41; a plurality of discharge holes 42a are arranged on the discharge cylinder 42, and the plurality of discharge holes 42a are arranged at intervals in the height direction, and the discharge holes 42a are communicated with the flow channel. The materials in the accommodation chamber of the shunt plate 41 flow into the tank body 10 through the flow channel and the discharge holes 42a in sequence. In this embodiment, the accommodation chamber of the shunt plate 41 is communicated with the flow channel of the discharge cylinder 42 through a guide pipe 46. The discharge cylinder 42 and the transmission shaft 20 and / or the shunt plate 41 can also be provided with connecting members such as spokes to increase the connection strength.

[0063] More preferably, in the radial direction of the transmission shaft 20, the discharge holes 42a are arranged on the outer end face of the discharge cylinder 42. During operation, the materials are thrown out of the discharge holes 42a under the action of centrifugal force.

[0064] In the circumferential direction of the transmission shaft 20 and the shunt plate 41, a plurality of the discharge cylinders 42 are arranged at intervals. In the projection plane perpendicular to the transmission shaft 20 and in the circumferential direction of the transmission shaft 20, the discharge cylinder 42 can be arranged between two adjacent (or two rows of) the stirring members 30. The overall cross-section of the discharge cylinder 42 is in the shape of a frustum of a cone. In the radial direction of the transmission shaft 20 (or the tank body 10), the discharge cylinder 42 is arranged in the middle of the tank body 10, so that the materials added later are conveyed to the inside of the previous materials, and then all the materials are evenly distributed by the rotation and stirring of the stirring members 30.

[0065] Another implementation manner is that in the radial direction of the transmission shaft 20 (or the tank body 10), the discharge cylinder 42 is arranged outside the stirring member 30. This layout is simpler, and the discharge cylinder 42 and the stirring member 30 can be relatively rotatably arranged, so it is more flexible.

[0066] This embodiment further includes a feed hopper 44. The feed hopper 44 is in the overall shape of a flaring funnel. The feed hopper 44 is fixedly arranged above the tank body 10 through a fixing frame 11. A feed inlet is arranged above the feed hopper 44, and a discharge outlet is arranged at the bottom; a material inlet is arranged at the top of the shunt plate 41, and the discharge outlet of the feed hopper 44 and the material inlet are arranged vertically opposite to each other. The materials poured into the feed hopper 44 flow into the accommodation chamber in the shunt plate 41 through the discharge outlet and the material inlet.

[0067] In this embodiment, the shunt plate 41 is arranged in the tank body 10; and, a feed pipe 45 is further included. The lower end of the feed pipe 45 is fixedly connected to the material inlet of the shunt plate 41, and the upper end of the feed pipe 45 is communicated with the discharge outlet of the feed hopper 44. The feed pipe 45 rotates with the shunt plate 41.

[0068] Preferably, a sealing bearing is provided between the upper end of the feed pipe 45 and the discharge port of the feed hopper 44; a sealing bearing is provided between the feed pipe 45 and the opening of the tank body 10 for simultaneously blocking the gaps between the feed pipe 45 and the opening of the tank body 10 and between the discharge port of the feed hopper 44. The feed hopper 44, the accommodating chamber of the shunt plate 41, and the inner flow path of the discharge cylinder 42 form a material conveying channel from outside the tank body 10 to the inside of the tank body 10.

[0069] In this embodiment, the materials are mixed more evenly and the mixing efficiency is greatly improved.

[0070] Embodiment 3

[0071] This embodiment is basically the same as Embodiment 2, except that:

[0072] As Figures 1-7 shown, in the raw material mixer disclosed in this embodiment, a control cover plate 43 is further provided inside the tank body 10; the control cover plate 43 is disposed on the outside of the discharge cylinder 42 so as to be relatively movable in the radial direction of the transmission shaft 20, and a plug 43a is provided on one side of the control cover plate 43 facing the discharge cylinder 42, and the plug 43a is adapted to the discharge hole 42a for blocking the discharge hole 42a;

[0073] This embodiment further includes a return spring 47, the return spring 47 is disposed between the control cover plate 43 and the discharge cylinder 42, and the return spring 47 tends to force the control cover plate 43 to approach the discharge cylinder 42, so that the plug 43a is inserted into the discharge hole 42a to block the discharge hole 42a. In this embodiment, the return spring 47 is an arc-shaped or bow-shaped spring.

[0074] When the transmission shaft 20 and the stirring member 30 are stationary, under the action of the return spring 47, the plug 43a is inserted into the discharge hole 42a to block the discharge hole 42a, and further block the material input channel of the feed hopper 44, the shunt plate 41, and the discharge cylinder 42, thereby realizing the sealing of the tank body 10, which helps to form a closed environment suitable for biological fermentation.

[0075] During the fermentation process, the electric heating element 2 can be turned on as needed to heat the materials and maintain a good working temperature.

[0076] Moreover, when stirring is required, the tank body 10 does not need to be opened. The driving motor 1 is started, and the driving motor 1 drives the stirring member 30 and the discharge cylinder 42 to rotate at a low speed through the transmission shaft 20. At this time, the centrifugal force is less than the elastic force of the return spring 47, and the plug 43a always blocks the material conveying channel during the stirring process, thereby maintaining a sealed working environment.

[0077] During the fermentation process or other working processes, when auxiliary raw materials need to be added, the auxiliary raw materials are poured into the feed hopper 44, and the drive motor 1 is started. The drive motor 1 drives the stirring member 30 and the discharge barrel 42 to rotate through the transmission shaft 20. When the speed exceeds the set value, the centrifugal force is greater than the elastic force of the return spring 47. Under the action of the centrifugal force, the control cover 43 moves radially outward with the plug 43a. The plug 43a disengages from the discharge hole 42a, unblocking the material conveying channel, and the auxiliary raw materials flow into the tank body 10 from the conveying channel.

[0078] More preferably, a counterweight block 48 is further included, and the counterweight block 48 is fixedly connected to the control cover plate 43, thereby improving the stability of the entire control system.

[0079] Preferably, the discharge barrel 42 is provided with a guide slot 42b radially extending from the transmission shaft 20. The control cover 43 is connected to the guide slot 42b via a guide rod 49. Specifically, the guide rod 49 is slidably inserted into the guide slot 42b, with one end fixedly connected to the control cover 43. The other end of the guide rod 49 is provided with a stop plate to prevent the guide rod 49 from completely disengaging from the guide slot 42b under centrifugal force. Optionally, a return spring 47 has one end abutting the stop plate and the other end abutting the discharge barrel 42. When compressed, the return spring 47 tends to force the control cover 43 toward the discharge barrel 42.

[0080] In the height direction, a group of guide slots 42b and a guide limiting structure composed of the guide rods 49 are respectively provided on the top and bottom of the discharge cylinder 42.

[0081] Preferably, the counterweight 48 is fixedly arranged at the other end of the guide rod 49 to serve as the above-mentioned limiting platform to play a limiting role.

[0082] Example 4

[0083] This embodiment is basically the same as embodiment 3, except that:

[0084] like Figure 8 As shown, in this embodiment, in the radial direction of the transmission shaft 20 (or the tank body 10 ), the discharge cylinder 42 is arranged on the outside of the stirring member 30 .

[0085] The diverter plate 41 is connected to the drive shaft 20 via a speed-limiting clutch 21. Specifically, the two ends of the speed-limiting clutch 21 are connected to the diverter plate 41 and the drive shaft 20, respectively. When the speed of the drive shaft 20 is lower than a specified speed, the speed-limiting clutch 21 is engaged. When the speed of the drive shaft 20 is equal to or higher than the specified speed, the speed-limiting clutch 21 is disengaged. The speed-limiting clutch 21 is conventional and will not be described in detail here.

[0086] When the rotational speed of the transmission shaft 20 is lower than the limit speed, the speed-limiting clutch 21 is in an engaged state, and the transmission shaft 20 drives the shunt disk 41, the discharge cylinder 42, and the stirring member 30 to rotate synchronously; when it is necessary to close the above-mentioned material conveying channel and stir the material at a high speed in a relatively airtight environment, the drive motor 1 drives the transmission shaft 20 to rotate at a high speed. After the rotational speed of the transmission shaft 20 is equal to or higher than the limit speed, the transmission shaft 20 disengages from the shunt disk 41. At this time, the transmission shaft 20 only drives the stirring member 30 to rotate, realizing sufficient stirring of the material. At the same time, since both the shunt disk 41 and the discharge cylinder 42 are in a static state or only rotate at a low speed, the control cover plate 43 approaches the discharge cylinder 42 under the action of the return spring 47, and the plug 43a blocks the discharge hole 42a, thereby blocking the material conveying channel and ensuring the sealed environment of the tank body 10.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A raw material mixer, characterized in that: include: Tank body, drive motor, transmission shaft, stirring element, electric heating element and feeding mechanism; The transmission shaft is rotatably disposed in the tank body, and one end of the transmission shaft is connected to the power output shaft of the drive motor; A plurality of stirring members are provided on the transmission shaft for stirring the material in the tank; The transmission shaft is hollow, and the electric heating element is arranged in the hollow of the transmission shaft; The stirring member is made of a heat-conducting material, and the inner end of the stirring member is connected to the electric heating element, or a heat-conducting structure is provided on the stirring member for conducting heat to the material, thereby heating the material during the stirring process; The feeding mechanism includes a diverter disc and a discharge barrel; the diverter disc is provided with a accommodating chamber, and the discharge barrel is provided with a flow channel; The diverter plate is arranged on the top of the transmission shaft; the discharge barrel is vertically arranged in the tank body, and the top of the discharge barrel is fixedly connected to the diverter plate; the flow channel in the discharge barrel is connected to the accommodating chamber in the diverter plate; a plurality of discharge holes are provided on the discharge barrel, and the discharge holes are connected to the flow channel, and the material in the accommodating chamber of the diverter plate flows into the tank body through the flow channel and the discharge holes in sequence; A control cover is also provided in the tank body; the control cover is relatively movably provided on the outside of the discharge barrel in the radial direction of the transmission shaft, and a plug is provided on one side of the discharge barrel, the plug being adapted to the discharge hole for sealing the discharge hole; It also includes a return spring, which is arranged between the control cover and the discharge barrel. The return spring tends to force the control cover to approach the discharge barrel, thereby inserting the plug into the discharge hole and sealing the discharge hole; the return spring is an arc-shaped or bow-shaped spring.

2. The raw material mixer according to claim 1, characterized in that A cavity is provided in the stirring member, and a heat-conducting member made of heat-conducting material is provided in the cavity. The inner end of the heat-conducting member extends into the hollow of the transmission shaft and is connected to the electric heating element.

3. The raw material mixer according to claim 2, characterized in that It also includes a heat-conducting sheet made of heat-conducting material. A plurality of heat-conducting sheets are inserted into the stirring member, and one end of the heat-conducting sheet is connected to the heat-conducting member for conducting heat out.

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

5. The raw material mixer according to claim 1, characterized in that The stirring member is a stirring blade or a stirring rod.

6. The raw material mixer according to claim 1, characterized in that The driving motor is arranged at the bottom of the tank body; and the transmission shaft is vertically arranged in the tank body.

7. The raw material mixer according to claim 1, characterized in that In the radial direction of the transmission shaft, the discharge hole is arranged on the outer end surface of the discharge barrel. During operation, the material is thrown out of the discharge hole under the action of centrifugal force.

8. The raw material mixer according to claim 1, characterized in that The plurality of discharge holes are spaced apart in the height direction.

9. The raw material mixer according to claim 1, characterized in that In the circumferential direction of the transmission shaft, a plurality of groups of stirring members are arranged at intervals; in the axial direction of the transmission shaft, a plurality of stirring members are arranged at intervals.

10. The raw material mixer according to claim 1, characterized in that A plurality of discharge barrels are arranged at intervals in the circumferential direction of the transmission shaft and the diverter plate.

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