CN116585925B

CN116585925B - Multi-shaft kneader

Info

Publication number: CN116585925B
Application number: CN202310869262.0A
Authority: CN
Inventors: 冯耀华; 王海龙; 张子琪; 冯健基
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2023-10-03
Anticipated expiration: 2043-07-17
Also published as: CN116585925A

Abstract

The application relates to the technical field of material mixing equipment, and particularly discloses a multi-shaft kneader, which comprises: the kneader comprises a kneader main body, a base, a clutch, a stirring paddle component, an upper cover and a material opening and closing component; the kneader body can be arranged on the base in a turnover way; the paddle assembly includes: a main paddle, a secondary paddle and a third paddle; the main paddle, the auxiliary paddle and the third paddle are rotatably arranged in the kneader body; the clutch is arranged on the auxiliary paddle and used for controlling the kneader body and the auxiliary paddle in a clutch mode; the upper cover is provided with a feed inlet; the feed opening and closing assembly is used for controlling the opening and closing of the feed inlet. The kneader body can be controlled to be connected with the auxiliary paddle through the clutch, so that the installation cost of the hydraulic system can be reduced; the third paddle can rotate in the kneading process to form a more complex material flow track, so that the kneading efficiency is improved, and the kneading effect is improved; the convenience degree of material addition can be improved through the material opening and closing assembly.

Description

Multi-shaft kneader

Technical Field

The application relates to the technical field of material mixing equipment, in particular to a multi-shaft kneader.

Background

A kneader is a device for mixing materials. The existing kneader is generally provided with two stirring paddles, wherein one stirring paddle has high rotating speed and the other stirring paddle has low rotating speed, so that shearing force is generated, materials are sheared, and the materials can be uniformly mixed.

The existing kneader has higher cost, and in the production process, two stirring paddles in the kneader generally reversely move at a fixed rotation speed ratio, and although the rotation speeds of the two stirring paddles are adjustable, only a single material convection model can be realized in the kneading process; in the process of kneading materials, a kneading blind area is formed regularly, so that part of the materials are accumulated in the kneading blind area to be unevenly mixed. Meanwhile, when materials are added, the upper cover is generally turned up, and the materials are inconvenient to add for multiple times.

Disclosure of Invention

In view of the above, the present application aims to provide a multi-shaft kneader, which is used for solving the problems of high cost, poor mixing effect and inconvenient feeding of the existing kneader.

To achieve the above technical object, the present application provides a multi-shaft kneader comprising: the kneader comprises a kneader main body, a base, a clutch, a stirring paddle component, an upper cover and a material opening and closing component;

the kneader body can be arranged on the base in a turnover way;

the paddle assembly includes: a main paddle, a secondary paddle and a third paddle;

the main paddle, the auxiliary paddle and the third paddle are rotatably arranged in the kneader body;

the clutch is arranged on the auxiliary paddle and used for controlling the kneader body and the auxiliary paddle in a clutch mode;

in the clutch linkage state, the kneader main body is rotationally connected with the auxiliary paddle synchronously;

in the clutch-off state, the kneader body is independently and rotatably connected with the auxiliary paddle and is abutted against the base through the clutch;

the upper cover can be arranged on the kneader body in a turnover way, and a feed inlet is formed in the upper cover;

the material opening and closing assembly is provided with a rotary grid and a rotary motor;

the rotary grid is rotatably arranged on the upper cover at a position corresponding to the feed inlet;

the rotary grid is provided with a communication grid and a sealing grid;

the rotating motor is arranged on the upper cover, is connected with the rotating grid in a transmission manner and is used for driving the rotating grid to rotate so that the communicating grid or the sealing grid is aligned with the feeding hole.

Further, the main paddles and the auxiliary paddles are arranged at intervals along the radial direction;

the axis of the third paddle coincides with the axis of the main paddle or the axis of the auxiliary paddle.

Further, the blades of the third paddle and the blades of the main paddle are of U-shaped structures, and are arranged at intervals along the same axial direction;

the main paddle, the auxiliary paddle and the third paddle are all connected with independent driving sources.

Further, the third paddle is identical to the main paddle in both structure and size.

Further, the blades of the main paddle are of an S-shaped structure, so that the main paddle forms two placement intervals;

the third paddle is arranged in one or two of the placement intervals;

the main paddle and the auxiliary paddle are connected with independent driving sources;

the main paddle and the third paddle are connected through a speed reducer, so that the main paddle and the third paddle are driven in a differential mode.

Further, the main paddle, the auxiliary paddle and the third paddle are arranged at intervals independently;

Further, the third paddle is arranged obliquely relative to the main paddle and/or the auxiliary paddle.

Further, the rotating grid comprises flaps and cover plates;

the plurality of petals are uniformly distributed in the circumference, and the communication grid is formed between two adjacent petals;

the cover plates are arranged in one of the communication grids, and two ends of the cover plates are respectively connected with two petals, so that the communication grids at the positions of the cover plates form the closed grid.

Further, the material opening and closing assembly further comprises: a drip can;

a drip opening is arranged on the upper cover;

the position of the drip cup corresponding to the drip opening is arranged on the upper cover.

From the above technical solution, the present application provides a multi-shaft kneader, comprising: the kneader comprises a kneader main body, a base, a clutch, a stirring paddle component, an upper cover and a material opening and closing component; the kneader body can be arranged on the base in a turnover way; the paddle assembly includes: a main paddle, a secondary paddle and a third paddle; the main paddle, the auxiliary paddle and the third paddle are rotatably arranged in the kneader body; the clutch is arranged on the auxiliary paddle and used for controlling the kneader body and the auxiliary paddle in a clutch mode; in the clutch linkage state, the kneader main body is rotationally connected with the auxiliary paddle synchronously; in the clutch-off state, the kneader body is independently and rotatably connected with the auxiliary paddle and is abutted against the base through the clutch; the upper cover can be arranged on the kneader body in a turnover way, and a feed inlet is formed in the upper cover; the material opening and closing assembly is provided with a rotary grid and a rotary motor; the rotary grid is rotatably arranged on the upper cover at a position corresponding to the feed inlet; the rotary grid is provided with a communication grid and a sealing grid; the rotating motor is arranged on the upper cover, is connected with the rotating grid in a transmission manner and is used for driving the rotating grid to rotate so that the communicating grid or the sealing grid is aligned with the feeding hole.

The auxiliary paddle is connected with the kneader body through the clutch, so that the auxiliary paddle drives the kneader body to turn over without additionally arranging a hydraulic system for driving the kneader body, and the installation cost of the hydraulic system can be reduced; the third paddle can rotate to form a more complex material flow track in the kneading process, so that the kneading flow field with only two stirring paddles is changed, and the purposes of improving the kneading efficiency and the kneading effect are further realized; the opening and closing frequency of the feeding port can be controlled according to the rotation speed of the rotary grid through the feeding port opening and closing assembly, so that a worker is not required to turn over the upper cover for many times, and the convenience degree of material addition is improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a perspective view of a multi-shaft kneader provided by an embodiment of the present application;

FIG. 2 is a schematic view of a kneader body of a multi-shaft kneader according to an embodiment of the present application;

FIG. 3 is a disassembled view of an upper cover of a multi-shaft kneader provided by an embodiment of the present application;

FIG. 4 is a top view of a main body portion of an upper cover of a multi-shaft kneader provided by an embodiment of the present application;

FIG. 5 is a schematic view of a main paddle and a third paddle of a multi-shaft kneader provided by an embodiment of the present application;

fig. 6 is a schematic diagram of a main paddle and a third paddle of a multi-shaft kneader according to another embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments disclosed in the specification without making any inventive effort, are intended to be within the scope of the application as claimed.

In the description of the embodiments of the present application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present application and to simplify 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 embodiments of the present application. 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 describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1 and 2, a multi-shaft kneader provided in an embodiment of the present application includes: kneader body 1, base 2, clutch 3, stirring rake subassembly 4, upper cover 5 and feed opening switching subassembly 6.

The paddle assembly 4 includes: a main paddle 41, a secondary paddle 42, and a third paddle 43; the main paddle 41, the auxiliary paddle 42 and the third paddle 43 are rotatably provided in the kneader body 1. The third slurry 43 is arranged to change a kneading blind area formed when the main slurry 41 and the auxiliary slurry 42 in the kneading cavity 41 form kneaded materials in a fixed kneading path, thereby being beneficial to forming a changeable kneading convection curve and realizing the effect of improving kneading.

The kneader body 1 is provided on the base 2 in a reversible manner. The clutch 3 is arranged on the auxiliary paddle 42 and is used for clutch control of the kneader body 1 and the auxiliary paddle 42; in the linkage state of the clutch 3, the kneader body 1 is connected with the auxiliary paddle 42 in a synchronous rotation manner; in the state where the clutch 3 is disengaged, the kneader body 1 and the auxiliary paddle 42 are rotatably connected independently, and the kneader body 1 is abutted against the base 2 through the clutch 3.

The clutch 3 may be an existing electromagnetic open-close clutch, which specifically enables the clutch to control the kneader body 1, the base 2 and the stirring paddle assembly 4.

In the state where the clutch 3 is in the interlocked state, the auxiliary paddle 42 can provide the turning power for the kneader body 1 while not affecting the stirring of the main paddle 41. Correspondingly, the auxiliary paddle 42 and the kneader body 1 can be moved independently when the clutch 3 is disengaged. In the state where the clutch 3 is in the disengaged state, the auxiliary paddle 42 is separated from the kneader body 1, and at this time, the auxiliary paddle 42 can be independently rotated with respect to the kneader body 1 and the kneader body 1 is fixedly connected to the base 2.

In the kneading process inside the kneader body 1, a kneading blind area is present between the main blade 41 and the auxiliary blade 42, and the material is accumulated in the kneading blind area. In this embodiment, when the clutch 3 is closed, along with the rotation of the auxiliary paddle 42, the relative positions of the centers of gravity of the kneader body 1, the auxiliary paddle 42 and the main paddle 41 can be changed, so that the kneading curve relationship between the original main paddle 41 and the auxiliary paddle 42 can be changed, and further the movement of the material in the kneading blind area is pushed, and the kneading of the material in the kneading blind area is realized.

For example, in the first state, the kneader body 1 performs material kneading in an inclined state; in the second state, the kneader body 1 is kneaded in the second state in a vertical state by closing the clutch 3 so that the auxiliary paddle 42 drives the kneader body 1 to rotate to the vertical state; in the process that the kneader body 1 is changed from the first state to the second state, the relative positions of the centers of gravity of the kneader body 1, the auxiliary paddle 42 and the main paddle 41 are changed, so that the kneading curve in the kneader body 1 is changed, and the position of a kneading blind area is changed; therefore, in the second state, the materials in the kneading blind area in the original first state can be pushed to be kneaded, and the kneading effect is further improved. In the actual production process, the angles of the kneader body 1 in the second state and the first state relative to the horizontal plane can be set according to actual needs, and the kneader body 1 in the first state and the second state can be in different angles; meanwhile, in the actual production process, the kneader body 1 can be switched a plurality of times in the first state and the second state; the first state and the second state may also include a plurality so that the kneader body 1 is kneaded at a plurality of different angles, respectively.

Referring to fig. 1, 3 and 4, the upper cover 5 is disposed on the kneader body 1 in a reversible manner, and a feeding opening 51 is disposed on the upper cover 5; the material opening and closing assembly 6 is provided with a rotary grid 61 and a rotary motor 62; the rotary grid 61 is rotatably arranged on the upper cover 5 at a position corresponding to the feed inlet 51; the rotary grid 61 is provided with a communication grid 63 and a sealing grid 64; the rotating motor 62 is disposed on the upper cover 5, and is in transmission connection with the rotating grid 61, and is used for driving the rotating grid 61 to rotate so as to align the communicating grid 63 or the sealing grid 64 with the feeding hole 51.

Specifically, a kneading cavity is defined between the upper cover 5 and the kneader body 1; the feed port 51 communicates with the kneading chamber. When the communication grid 63 is aligned with the feed inlet 51, the kneading cavity is communicated with the outside through the feed inlet 51, so that the material can enter the kneading cavity through the communication grid 63. When the closure lattice 64 is aligned with the feed opening 51, the closure lattice 64 closes the feed opening 51.

In the embodiment, when materials are added into the kneading cavity, the rotary grid 61 can be driven by the rotary motor 62 to rotate to control the opening and closing of the feed inlet 51, so that the opening and closing time of a worker is reduced, and the production efficiency can be improved; meanwhile, the automatic sectional continuous feeding can be realized by controlling the rotating grid 61, and the method is more suitable for batch addition of non-wetting materials.

In a more specific embodiment, the rotating grid 61 includes petals 65 and a cover plate 66; the plurality of petals 65 are uniformly distributed circumferentially around the output shaft of the rotary motor 62, and a communication grid 63 is formed between two adjacent petals 65; the cover plate 66 is disposed in one of the communicating cells 63, and two flaps 65 are respectively connected to two ends of the communicating cell 63 in the position of the cover plate 24 to form a closed cell 64. The number of the cover sheets 24 may be one or a plurality of the cover sheets may be provided as required.

That is, in the present embodiment, two adjacent petals 65 constitute a sector-shaped communication lattice 63; correspondingly, the inlet 51 may be fan-shaped and the cover 66 may be fan-shaped. When the cover plate 66 is rotated to the access port 51, the cover plate 66 can completely cover the access port 51, thereby completely closing the access port 51.

By providing the flaps 65 and the cover plates 66, it is possible to ensure independence between each of the communication cells 63 while achieving the sectional automatic feeding.

It should be noted that, in this embodiment, the feeding port 51 is directly connected to the kneading cavity, and the material does not need to pass through a lengthy pipe when the material is added, so that the problem of stacking the material can be avoided.

As a further improvement, further comprising: an annular baffle 60; the annular baffle 60 is arranged on the upper cover 5; the rotary grid 61, the rotary motor 62 and the feed inlet 51 are all located in the annular baffle 4.

Further, the method further comprises the following steps: a bin cover 69; the annular baffle 60 is arranged on the top of the upper cover 5; the bin cover 69 is used to cover the top of the annular barrier 60 to enclose the top surface of the annular barrier 60.

Specifically, after the kneader is used, the bin cover 69 can be covered on the annular baffle 60 to avoid dust adhering to the rotary grid 61.

A gap of 0.05-2mm exists between the rotating grid 61 and the annular baffle 60, so that the rotating grid 61 and the annular baffle 60 can be prevented from rubbing against each other.

Further, the rotary grid 61 and the rotary motor 62 each include a plurality of; correspondingly, the number of annular baffles 60 is plural.

In one embodiment, the spout opening and closing assembly 6 further comprises: a drip can 67; the upper cover 5 is provided with a drip opening 52; the drip cup 67 is provided on the upper cover 5 at a position corresponding to the drip opening 52.

The drip tank 67 communicates with the kneading chamber through the drip port 52, and a liquid additive may be added into the kneading chamber to accelerate kneading into a mass or to reduce friction power at a proper time.

Wherein, the drip tank 67 may be connected with an electric controller 671 to adjust the addition amount and the addition time by the electric controller 671 to realize automatic control. The number of drip cans 67 may be set according to actual needs.

In one embodiment, further comprising: a shower head 68; the cover plate 1 is provided with a spray opening 53; the shower head 68 is provided on the upper cover 5 at a position corresponding to the shower port 53.

The spray head 68 can be an ultrasonic wide-angle cleaning spray head, is connected with the inside of the kneading cavity through the spray opening 53, can be used for impacting and spraying liquid to a target position in the kneading cavity in a ultrasonic speed pulse mode after pressurizing, and can be used for cleaning the inside of the kneading cavity.

The base 2 is provided with a spray cleaning liquid filtering and storage tank 12 and a booster pump 13, and the cleaning liquid is sprayed to the wall surface and the corner position of the kneading cavity in an ultrasonic pulsation mode through the booster pump 13 and an ultrasonic control valve to clean a non-extrusion stress surface (the position where residual materials are easy to remain) on the kneading paddle. The cleaning solution in the kneading chamber is finally recovered to the spray cleaning solution filter and the storage tank 12 through the vacuum return port. A vacuum pump and a filter are arranged between the vacuum return port and the loop of the cleaning liquid storage tank.

In another embodiment, the kneader body 1 is provided with a distance sensor 11.

Wherein, the distance sensor 11 can be arranged at the top and the bottom of the kneader body 1, and the distance sensor 7 can sense the distance when the worker approaches the kneader body 1; when the distance sensor 7 determines that the safety distance is insufficient, a signal can be transmitted to the terminal controller to control the kneading action of the kneader to stop.

As an embodiment, the main paddle 41 and the auxiliary paddle 42 are arranged at a radial interval; the axis of the third paddle 43 coincides with the axis of the main paddle 41 or the axis of the auxiliary paddle 42.

Specifically, in the present embodiment, the main paddle 41 is coaxial with the third paddle 43, and the main paddle 41 is not coaxial with the auxiliary paddle 42. The axis of the auxiliary paddle 42 may be inclined with respect to the axis of the main paddle 41.

The main paddle 41 and the third paddle 43 can rotate in the same direction or in opposite directions; the main paddle 41 and the third paddle 43 rotate respectively, so that kneading pressure and dispersing capability can be provided, more variable flow field models are realized, and meanwhile, larger pressure difference is generated on the left side and the right side of the kneading cavity, so that the material is pushed to flow into a kneading zone. The problem that the material accumulation area (kneading blind area) is formed when the common two-paddle kneader works is avoided, and more materials on the left side and the right side can enter the middle high-load kneading area more easily due to the fact that the large pressure difference exists on the left side and the right side, so that the effective volume rate of the hopper is improved, and the lower energy consumption ratio and the higher kneading efficiency can be realized in the kneading process.

In a more specific embodiment, referring to fig. 5, the blades of the third paddle 43 and the blades of the main paddle 41 are both U-shaped structures, and are arranged at intervals along the same axial direction; independent driving sources are connected to each of the main paddle 41, the auxiliary paddle 42, and the third paddle 43.

Wherein, third oar 43 and main oar 41 can be set up to be unanimous in structure and size, be convenient for actual production and processing. The third paddle 43 and the main paddle 41 may be configured to be different in size, which is helpful for generating different pressures on both sides of the interior of the kneading chamber when the third paddle and the main paddle are rotated and stirred.

In another embodiment, referring to fig. 6, the blades of the main paddle 41 have an S-shaped structure, so that the main paddle 41 forms two placement spaces 44; third paddle 43 is disposed within one or both of the insertion spaces 44; independent driving sources are connected to each of the main paddle 41, the auxiliary paddle 42, and the third paddle 43.

In the present embodiment, the blades of the third paddle 43 may be square blades; correspondingly, the insertion space 44 is square. The main paddle 41 forms two insertion spaces 44; the third paddle 43 may be provided in only one insertion space 44, or the third paddle 43 may be provided in both insertion spaces 44.

Taking the example that the third paddles 43 are disposed in the two placement spaces 44, the two third paddles 43 may be connected in a synchronous rotation manner, or may be connected to a driving source.

In this embodiment, the main paddle 41 and the third paddle 43 form a coaxial structure, so that variable laminar pressure can be formed to enable the material adhered to the main paddle surface to diffuse to the outer layer.

In other embodiments, the blades of the main paddle 41 are of an S-shaped configuration such that the main paddle 41 forms two interposed spaces 44; third paddle 43 is disposed within one or both of the insertion spaces 44; the main paddle 41 and the auxiliary paddle 42 are connected with independent driving sources; the main paddle 41 and the third paddle 43 are connected through a speed reducer so as to realize differential transmission of the main paddle 41 and the third paddle 43.

That is, in the present embodiment, the third paddle 43 shares the same driving source as the main paddle 41, and differential transmission is realized between the two by a speed reducer to improve kneading effect.

As another embodiment, referring to fig. 2, the main paddle 41, the auxiliary paddle 42 and the third paddle 43 are arranged at independent intervals; independent driving sources are connected to each of the main paddle 41, the auxiliary paddle 42, and the third paddle 43.

Wherein the third paddles 43 are arranged inclined with respect to the main paddles 41 and/or the secondary paddles 42.

Specifically, the inclined arrangement of the third paddles 43 contributes to a large flow path during kneading of the material, so that the material can be kneaded more uniformly to enhance the kneading effect.

Further, the angle between the axis of the third paddle 43 and the axis of the main paddle 41 and/or the axis of the auxiliary paddle 42 is smaller than 10 degrees, so that the processing is facilitated during production.

In the above embodiment, the rotation curves of the main paddle 41, the auxiliary paddle 42 and the third paddle 43 are not in contact or tangential.

In the above embodiment, the driving source may be independently controlled by a direct-drive motor.

Specifically, in order to make the stirring paddle have larger torque, the existing kneader generally uses a speed reducer to connect with a motor, and the transmission structure has large noise and poor concentric precision in axial connection and installation, is easy to cause operation vibration, and reduces the service life of a bearing.

In the embodiment, the main paddle 41, the auxiliary paddle 42 and the third paddle 43 are driven by adopting direct drive motors, so that a gear reducer and a middle connection transmission part can be omitted, noise and transmission loss are greatly reduced, and the transmission rigidity is increased; and the main paddle 41, the auxiliary paddle 42 and the third paddle 43 can independently control the rotating speed and the steering, so as to realize variable kneading laminar flow and realize the direct drive torque of a conventional motor by tens of times. The direct-drive motor has the advantages of light weight, closed-loop control in full speed range, strong overload resistance, direct connection with a paddle shaft, simple installation and easy control of concentric precision.

In the present embodiment, the outer curved surface formed by rotating the main paddle 41 is not limited to an equal curvature curve, and may be, for example, a unidirectional cone, a bidirectional cone, or a multi-segment complementary gourd shape; similarly, the outer curved surface formed by rotation of the auxiliary paddle 42 is not limited to an equal curvature curve; the outer curved surface formed by rotation of the third paddle 43 is not limited to an equal curvature curve.

In another embodiment, third paddle 43 is a non-constant diameter stirring rod, for example third paddle 43 may be a tapered stirring rod or a gourd shaped stirring rod.

The provision of the unequal diameter third paddles 43 helps to promote material flow and more helps to create a variable kneading convection profile within the kneading chamber.

In one embodiment, third paddle 43 is located outside the perpendicular bisector of the axis line of primary paddle 41 and secondary paddle 42.

In the present embodiment, the main paddle 41 and the auxiliary paddle 42 are disposed in parallel with the axis; the third paddle 43 being located at a position other than the perpendicular bisector of the line connecting the axes of the main paddle 41 and the auxiliary paddle 42 means that a rectangle can be obtained by abutting the axes of the main paddle 41 and the auxiliary paddle 42, a perpendicular plane is taken along the center line in the direction of the line connecting the two, and the third paddle 43 is not located on the perpendicular plane.

By providing the third paddle 43 at a position other than the perpendicular bisector of the axis line of the main paddle 41 and the auxiliary paddle 42, the third paddle 43 can be prevented from being located at a symmetrical position of the main paddle 41 and the auxiliary paddle 42, and thus the occurrence of kneading dead zones can be further prevented.

While the application has been described in detail with reference to the examples, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the application may be modified or equivalents may be substituted for elements thereof, and that any modifications, equivalents, improvements or changes will fall within the spirit and principles of the application.

Claims

1. A multi-shaft kneader, characterized by comprising: the kneader comprises a kneader main body (1), a base (2), a clutch (3), a stirring paddle component (4), an upper cover (5) and a material opening and closing component (6);

the kneader body (1) can be arranged on the base (2) in a turnover way;

the stirring paddle assembly (4) comprises: a main paddle (41), a secondary paddle (42) and a third paddle (43);

the main paddle (41), the auxiliary paddle (42) and the third paddle (43) are all rotatably arranged in the kneader main body (1);

the clutch (3) is arranged on the auxiliary paddle (42) and is used for controlling the kneader body (1) and the auxiliary paddle (42) in a clutch mode;

in the linkage state of the clutch (3), the kneader main body (1) is rotationally connected with the auxiliary paddle (42) synchronously;

in the state that the clutch (3) is separated, the kneader body (1) is independently and rotatably connected with the auxiliary paddle (42), and the kneader body (1) is abutted against the base (2) through the clutch (3);

in the linkage state of the clutch (3), the relative positions of the gravity centers of the kneader main body (1), the auxiliary paddle (42) and the main paddle (41) can be changed along with the rotation of the auxiliary paddle (42);

the upper cover (5) can be arranged on the kneader main body (1) in a turnover way, and a feed inlet (51) is formed in the upper cover (5);

the material opening and closing assembly (6) is provided with a rotary grid (61) and a rotary motor (62);

the rotary grid (61) is rotatably arranged on the upper cover (5) at a position corresponding to the feed inlet (51);

the rotary grid (61) is provided with a communication grid (63) and a sealing grid (64);

the rotating motor (62) is arranged on the upper cover (5) and is in transmission connection with the rotating grid (61) and is used for driving the rotating grid (61) to rotate so as to align the communicating grid (63) or the sealing grid (64) with the feeding hole (51);

the main paddles (41) and the auxiliary paddles (42) are arranged at intervals along the radial direction;

the axis of the third paddle (43) coincides with the axis of the main paddle (41);

the blades of the main paddle (41) are of an S-shaped structure, so that the main paddle (41) forms two placement intervals (44);

the third paddle (43) is arranged in one or two of the placement intervals (44);

the main paddle (41), the auxiliary paddle (42) and the third paddle (43) are connected with independent driving sources;

the third paddle (43) is an unequal diameter stirring rod.

2. Multiaxial kneader according to claim 1, characterised in that the blades of the third paddle (43) and the blades of the main paddle (41) are both of U-shaped structure and are arranged at intervals along the same axial direction;

the main paddle (41), the auxiliary paddle (42) and the third paddle (43) are all connected with independent driving sources.

3. Multiaxial kneader according to claim 2, characterised in that the third paddle (43) is identical to the main paddle (41) both in structure and in size.

4. Multiaxial kneader according to claim 1, characterised in that the third paddles (43) are arranged obliquely relative to the main paddles (41) and/or the secondary paddles (42).

5. Multiaxial kneader according to claim 1, characterised in that the rotating grid (61) comprises petals (65) and cover sheets (66);

the plurality of petals (65) are uniformly distributed circumferentially, and the communication grid (63) is formed between two adjacent petals (65);

the cover plates (66) are arranged in one communication grid (63), and two ends of the cover plates are respectively connected with two flap pieces (65), so that the communication grid (63) at the position of the cover plates (66) forms the closed grid (64).

6. Multiaxial kneader according to claim 1, characterised in that the throat opening and closing assembly (6) further comprises: a drip cup (67);

a drain opening (52) is arranged on the upper cover (5);

the position of the drip cup (67) corresponding to the drip opening (52) is arranged on the upper cover (5).