Stirring device

Abstract

The present invention relates to a stirring device, wherein the stirrer comprises a first open end, a stirring shaft and a second open end. The stirring shaft is hollow inside, and comprises a first end and a second end that are connected. The stirring shaft is used to rotate and stir the medium. The first open end is connected to the first end, and the second end is connected to the second open end. Either one of the first open end and the second open end is used to input a temperature control fluid, and the other of the first open end and the second open end is used to output the temperature control fluid. The stirring shaft rotates in a container to stir the medium evenly, and the temperature control fluid circulating in the stirring shaft can also heat or cool the medium during the rotation of the stirring shaft, thereby ensuring that the medium in each area can be heated or cooled, and the temperature of the medium can be accurately controlled to avoid the phenomenon of uneven temperature of the medium, which is conducive to improving the uniformity and accuracy of the temperature of the medium.

Description

Technical Field

[0001] The invention relates to the technical field of medium stirring, in particular to a stirring device. Background Art

[0002] At present, a stirring device generally includes a reducer and a stirring shaft. The reducer drives the stirring shaft to stir the medium in the container so that the medium in the container is mixed evenly.

[0003] When the stirring device is used in heating, cooling and other working conditions, the current practice is generally to add a heating jacket or a cooling jacket to the outside of the container containing the medium to heat or cool the medium; some practices also add a heat exchanger inside the container to achieve the heating or cooling function. However, both methods will lead to a large temperature gradient near the heating area or the cooling area, and the temperature of the medium in the container will change unevenly, which cannot meet the requirements of precise temperature control. When the medium is a temperature-sensitive medium (for example, the medium is a cell-type medium in the pharmaceutical industry), it cannot meet its precise temperature difference control needs, and overheating or overcooling will occur, thereby destroying the physical properties of the medium. Summary of the invention

[0004] Based on this, it is necessary to provide a stirring device to address the above technical problems, which can uniformly heat or cool the medium and accurately control the temperature of the stirred medium.

[0005] A stirring device comprises:

[0006] A stirrer, the stirrer comprises a first open end, a stirring shaft and a second open end, the stirring shaft is hollow inside, the stirring shaft comprises a first end and a second end connected to each other, the stirring shaft is used to rotate and stir the medium, the first open end is connected to the first end, and the second end is connected to the second open end; either one of the first open end and the second open end is used to input a temperature control fluid, and the other one of the first open end and the second open end is used to output the temperature control fluid.

[0007] The technical solution is further described below:

[0008] In one embodiment, the agitator further includes a first pipe and a second pipe, the first open end is connected to the first end through the first pipe, and the second end is connected to the second open end through the second pipe.

[0009] In one embodiment, the stirring device also includes a first lip seal, the first opening end is connected to one end of the first pipe, the first lip seal is provided at the connection between the first opening end and the first pipe, and the other end of the first pipe is sealed and connected to the first end of the stirring shaft.

[0010] In one embodiment, the stirring device further includes a first sleeve, the first pipe is inserted into the first sleeve, and the first pipe can rotate in the first sleeve.

[0011] In one embodiment, the first pipe is sleeved in the second pipe, and a sandwich channel is formed between the outer wall of the first pipe and the inner wall of the second pipe, and sealing plates are provided at both ends of the sandwich channel, and the sealing plates are used to close the two ends of the sandwich channel; a first through hole and a second through hole are opened on the side wall of the second pipe, and the sandwich channel is connected to the second open end through the first through hole, and the second end of the stirring shaft is connected to the sandwich channel through the second through hole.

[0012] In one embodiment, the stirring device also includes a second sleeve, a second lip seal and a third lip seal. The second lip seal and the third lip seal are respectively arranged above and below the first through hole of the second pipe. The second pipe is sleeved in the second sleeve, and the second lip seal and the third lip seal are both installed in the second sleeve. The outer wall of the second lip seal is tightly attached to the inner wall of the second sleeve, and the outer wall of the third lip seal is tightly attached to the inner wall of the second sleeve. The second pipe can rotate in the second sleeve.

[0013] In one embodiment, a third through hole is formed on the second sleeve, the second opening end is inserted into the third through hole, and the second opening end is connected to the interlayer channel through the third through hole and the first through hole in sequence.

[0014] In one embodiment, the second lip seal and the third lip seal are made of modified Teflon material, and the first through hole is a round hole, a square hole or an elongated hole.

[0015] In one embodiment, the stirring device further comprises a driving member, and the outer wall of the second pipe is connected to the driving member via a flat key.

[0016] In one embodiment, the stirring shaft rotates around its rotation axis, and the stirring shaft includes a transverse tube arranged perpendicular to the rotation axis; along the length direction of the transverse tube, a first spoiler blade and a second spoiler blade are installed on the transverse tube; the length directions of the first spoiler blade and the second spoiler blade are parallel to the rotation axis, the second spoiler blade is arranged between the first spoiler blade and the rotation axis, the width direction of the second spoiler blade forms an acute angle with the length direction of the transverse tube, and the width direction of the second spoiler blade forms an angle with the width direction of the first spoiler blade.

[0017] The above stirring device has at least the following beneficial effects:

[0018] The stirring device provided in this embodiment includes a stirrer, which includes a stirring shaft, and the interior of the stirring shaft is hollow. When the stirrer is working, it is only necessary to inject the temperature control fluid into any one of the first opening end and the second opening end, and the temperature control fluid flows through the stirring shaft, and then outputs the temperature control fluid from the other of the first opening end and the second opening end. In this way, the stirring shaft rotates in the container to stir the medium evenly, and the temperature control fluid circulating in the stirring shaft can also heat or cool the medium during the rotation of the stirring shaft, ensuring that the medium in each area can be heated or cooled, and the temperature of the medium can be accurately controlled to avoid the phenomenon of uneven temperature of the medium, which is conducive to improving the uniformity and accuracy of the medium temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a stirring device provided in one embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a stirring device provided in one embodiment of the present invention;

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the structure at P in the middle;

[0024] Figure 4 A schematic diagram of the structure of an agitator provided in one embodiment of the present invention;

[0025] Figure 5 for Figure 4 Schematic diagram of the top view structure of the stirring shaft.

[0026] Explanation of the reference numerals: 100, stirring device; 110, stirrer; 111, first open end; 112, second open end; 113, stirring shaft; 1131, first end; 1132, second end; 1133, rotation shaft; 1134, transverse tube; 1135, first spoiler blade; 1136, second spoiler blade; 114, first pipe; 115, second pipe; 1151, first through hole; 1152, second through hole; 1153, first keyway; 116, interlayer channel; 120, first lip seal; 130, second lip seal; 140, third lip seal; 150, first sleeve; 160, second sleeve; 161, third through hole; 170, drive member; 171, flat key. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0028] This embodiment provides a stirring device 100, which has the advantages of being able to uniformly heat or cool a medium and accurately control the temperature of the stirred medium, which will be described in detail below with reference to the accompanying drawings.

[0029] In one embodiment, see Figure 1A stirring device 100 is used to stir a medium, and the stirring device 100 includes a stirrer 110. The stirrer 110 includes a first open end 111, a stirring shaft 113 and a second open end 112. The stirring shaft 113 is hollow inside, and includes a first end 1131 and a second end 1132 that are connected. The stirring shaft 113 is used to rotate and stir the medium. The first open end 111 is connected to the first end 1131, and the second end 1132 is connected to the second open end 112. Any one of the first open end 111 and the second open end 112 is used to input a temperature control fluid, and the other of the first open end 111 and the second open end 112 is used to output the temperature control fluid. Among them, the temperature control fluid refers to a fluid with a certain temperature. For example, when the medium placed in the container needs to be heated, a hot temperature control fluid can be injected from the first open end 111 or the second open end 112, and the temperature control fluid flows into the stirring shaft 113, and the stirring shaft 113 can heat the medium while stirring the medium. When the medium placed in the container needs to be cooled, a cold temperature control fluid can be injected from the first open end 111 or the second open end 112, and the temperature control fluid flows into the stirring shaft 113. The stirring shaft 113 can cool the medium while stirring the medium. Moreover, when the stirring device is running, the temperature control fluid can be continuously and uninterruptedly introduced into the stirrer.

[0030] The stirring device 100 provided in this embodiment includes a stirrer 110, and the stirrer 110 includes a stirring shaft 113, and the interior of the stirring shaft 113 is hollow. When the stirrer 110 is working, it is only necessary to inject the temperature control fluid into any one of the first opening end 111 and the second opening end 112, and the temperature control fluid flows through the stirring shaft 113, and then outputs the temperature control fluid from the other of the first opening end 111 and the second opening end 112. In this way, the stirring shaft 113 rotates in the container to stir the medium evenly, and the temperature control fluid flowing in the stirring shaft 113 can also heat or cool the medium during the rotation of the stirring shaft 113, ensuring that the medium in each area can be heated or cooled, and the temperature of the medium can be accurately controlled to avoid the phenomenon of uneven temperature of the medium, which is conducive to improving the uniformity and accuracy of the temperature of the medium.

[0031] In one embodiment, see Figure 1 , Figure 3 and Figure 4 The agitator 110 further includes a first pipe 114 and a second pipe 115 , the first opening end 111 is connected to the first end 1131 through the first pipe 114 , and the second end 1132 is connected to the second opening end 112 through the second pipe 115 .

[0032] In one embodiment, see Figure 1 , Figure 3 and Figure 4 , the first pipe 114 is sleeved in the second pipe 115. A sandwich channel 116 is formed between the outer wall of the first pipe 114 and the inner wall of the second pipe 115. Sealing plates (not shown) are provided at both ends of the sandwich channel 116. The sealing plates are used to close the two ends of the sandwich channel 116. Specifically, the first pipe 114 and the second pipe 115 form a sleeve. The sealing plate is an annular plate with a hole in the middle, and the hole in the middle is equal to the end opening of the first pipe 114. The sealing plates are welded to the end faces of the first pipe 114 and the second pipe 115, and are used to close the two ends of the sandwich channel 116. For further information, please refer to Figure 3 and Figure 4 , a first through hole 1151 and a second through hole 1152 are provided on the side wall of the second pipe 115, and the interlayer channel 116 is connected to the second open end 112 through the first through hole 1151. The second end 1132 of the stirring shaft 113 is connected to the interlayer channel 116 through the second through hole 1152. Taking the injection of temperature control fluid into the first open end 111 and the output of temperature control fluid from the second open end 112 as an example, the flow of fluid in the stirrer 110 is specifically described: the temperature control fluid injected from the first open end 111 flows from the first pipe 114 into the first end 1131 of the stirring shaft 113, and then flows from the second end 1132 of the stirring shaft 113 to the second through hole 1152 on the second pipe 115, and enters the interlayer channel 116; the temperature control fluid in the interlayer channel 116 then flows from the first through hole 1151 to the second open end 112, and finally the temperature control fluid is output from the second open end 112, completing the unidirectional flow of the temperature control fluid.

[0033] In one embodiment, see Figures 2 to 3 The stirring device 100 further includes a first lip seal 120, the first opening end 111 is connected to one end of the first pipe 114, the first lip seal 120 is provided at the connection between the first opening end 111 and the first pipe 114, and the other end of the first pipe 114 is sealed and connected to the first end 1131 of the stirring shaft 113. Specifically, the first lip seal 120 is a lip seal ring made of modified Teflon material to ensure that the temperature control fluid does not stick to the first lip seal 120. The function of the first lip seal 120 is to seal the connection between the first opening end 111 and the first pipe 114 to prevent the temperature control fluid from overflowing from the connection between the first opening end 111 and the first pipe 114. The other end of the first pipe 114 can be made into an integrally formed structure with the first end 1131 of the stirring shaft 113, or a seal can be installed at the connection between the first pipe 114 and the first end 1131 of the stirring shaft 113 to ensure that the temperature control fluid does not leak out of the connection between the first pipe 114 and the stirring shaft 113.

[0034] In one embodiment, see Figure 1 and Figure 3 The stirring device 100 further includes a first sleeve 150, the first pipe 114 is inserted into the first sleeve 150, and the first pipe 114 can rotate in the first sleeve 150. The first lip seal 120 is installed in the first sleeve 150. Specifically, the sleeve formed by the first pipe 114 and the second pipe 115 is inserted into the first sleeve 150, and the first lip seal 120 is also installed in the first sleeve 150. The sleeve formed by the first pipe 114 and the second pipe 115 can rotate in the first sleeve 150, and the first sleeve 150 remains stationary.

[0035] In one embodiment, see Figure 1 and Figure 3 The stirring device 100 further includes a second sleeve 160, a second lip seal 130 and a third lip seal 140. The second lip seal 130 and the third lip seal 140 are respectively arranged above and below the first through hole 1151 of the second pipe 115. The second pipe 115 is sleeved in the second sleeve 160, and the second lip seal 130 and the third lip seal 140 are both installed in the second sleeve 160. The outer wall of the second lip seal 130 is in close contact with the inner wall of the second sleeve 160, and the outer wall of the third lip seal 140 is in close contact with the inner wall of the second sleeve 160, and the second pipe 115 can rotate in the second sleeve 160. The second sleeve 160 is provided with a third through hole 161, and the second open end 112 is inserted into the third through hole 161. The second open end 112 is connected to the interlayer channel 116 through the third through hole 161 and the first through hole 1151 in sequence. Specifically, the second lip seal 130 and the third lip seal 140 are both lip seals made of modified Teflon. The second lip seal 130, the outer wall of the second sleeve 160, the third lip seal 140 and the outer wall of the second pipe 115 form a chamber. When the temperature control fluid is input from the first open end 111, the temperature control fluid flows into the interlayer channel 116, and can only flow into this chamber from the first through hole 1151, and then flow from the third through hole 161 of the second sleeve 160 to the second open end 112.

[0036] Furthermore, a plurality of first through holes 1151 may be provided along the circumference of the second pipe 115, and the first through holes 1151 may be round holes, square holes or elongated holes, and their specific shapes and numbers are not specifically limited herein. The shape of the stirring shaft 113 may be other shapes besides the serpentine shape, which are not specifically limited herein.

[0037] In one embodiment, see Figures 1 to 3, the stirring device 100 also includes a driving member 170, and the outer wall of the second pipe 115 is connected to the driving member 170 through a flat key 171. Specifically, a first keyway 1153 is provided on the outer wall of the second pipe 115, and a second keyway (not shown) is provided on the rotating part (not shown) of the driving member 170, and the flat key 171 is stuck in the first keyway 1153 and the second keyway to achieve the installation of the driving member 170 and the second pipe 115. When the rotating part of the driving member 170 rotates, the second pipe 115 can be driven to rotate, and the first pipe 114 and the second pipe 115 rotate at the same time, and the stirring shaft 113 is also driven by the first pipe 114 to rotate. The first sleeve 150 is placed at one end of the second sleeve 160, and the other end of the second sleeve 160 can also be fixed to the driving member 170 using fasteners such as screws. Further, the driving member 170 can be a reducer, a motor, a pneumatic motor and other devices.

[0038] In one embodiment, see Figure 1 , Figure 3 and Figure 5 , the stirring shaft 113 is a serpentine curved pipe with a circuitous bend. The contact area between the serpentine curved pipe and the medium is large, which is conducive to contacting more medium, improving stirring efficiency and improving heating efficiency or cooling efficiency. The stirring shaft 113 rotates around its rotation axis 1133, and the stirring shaft 113 includes a transverse tube 1134 arranged perpendicular to the rotation axis 1133. Along the length direction of the transverse tube 1134, the transverse tube 1134 is equipped with a first spoiler blade 1135 and a second spoiler blade 1136. The length directions of the first spoiler blade 1135 and the second spoiler blade 1136 are both parallel to the rotation axis 1133. The second spoiler blade 1136 is arranged between the first spoiler blade 1135 and the rotation axis 1133. The width direction of the second spoiler blade 1136 forms an acute angle with the length direction of the transverse tube 1134. The width direction of the second spoiler blade 1136 forms an angle with the width direction of the first spoiler blade 1135. Specifically, the first spoiler blade 1135 and the second spoiler blade 1136 are both rectangular strip-shaped structures, each including a long side and a wide side. The length direction of the first spoiler blade 1135 is the direction of its long side, and the width direction is the direction of its wide side.

[0039] by Figure 5 Taking the transverse tube 1134 and the second spoiler blade 1136 as an example, Figure 5The width direction of the second spoiler blade 1136 in the horizontal tube 1134 forms an acute angle with the length direction of the horizontal tube 1134, the width direction of the first spoiler blade 1135 is perpendicular to the length direction of the horizontal tube 1134, and two groups of first spoiler blades 1135 and second spoiler blades 1136 are arranged on the agitator 110. When the agitator 110 rotates clockwise, the fluid between the first spoiler blade 1135 and the second spoiler blade 1136 will go through the process of narrowing the space from wide to narrow, the local volume is compressed, and the flow rate becomes faster. According to Bernoulli's principle, when the flow rate of the fluid increases, the pressure decreases, and the environmental pressure outside the area remains unchanged. The fluid will quickly flow to the wide-mouth part of the angle formed by the first spoiler blade 1135 and the second spoiler blade 1136 due to the pressure difference, forming local turbulence. The rotation direction of the medium in the turbulence is opposite to the rotation direction of the agitator 110, thereby breaking the unidirectional radial fluid steady state, accelerating the turbulent diffusion speed, improving the medium mixing efficiency and mixing quality, and making the temperature of the medium more uniform. It is understandable that the first spoiler blades 1135 and the second spoiler blades 1136 can be provided in multiple groups, and the number is not specifically limited here. The first spoiler blades 1135 and the second spoiler blades 1136 can also be strip blades of other shapes.

[0040] The stirring device 100 provided in this embodiment includes a stirrer 110, and the stirrer 110 includes a stirring shaft 113, and the interior of the stirring shaft 113 is hollow. When the stirrer 110 is working, it is only necessary to inject the temperature control fluid into any one of the first opening end 111 and the second opening end 112, and the temperature control fluid flows through the stirring shaft 113, and then outputs the temperature control fluid from the other of the first opening end 111 and the second opening end 112. In this way, the stirring shaft 113 rotates in the container to stir the medium evenly, and the temperature control fluid flowing in the stirring shaft 113 can also heat or cool the medium during the rotation of the stirring shaft 113, ensuring that the medium in each area can be heated or cooled, and the temperature of the medium can be accurately controlled to avoid the phenomenon of uneven temperature of the medium, which is conducive to improving the uniformity and accuracy of the temperature of the medium.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A stirring device for stirring a medium, characterized in that: include: A stirrer, the stirrer comprising a first open end, a stirring shaft and a second open end, the stirring shaft is hollow inside, the stirring shaft comprises a first end and a second end connected to each other, the stirring shaft is used to rotate and stir the medium, the first open end is connected to the first end, and the second end is connected to the second open end; any one of the first open end and the second open end is used to input a temperature control fluid, and the other of the first open end and the second open end is used to output the temperature control fluid; The stirring shaft further comprises a first pipe and a second pipe, the first pipe is sleeved in the second pipe, and a sandwich channel is formed between the outer wall of the first pipe and the inner wall of the second pipe; sealing plates are provided at both ends of the sandwich channel, the sealing plates are annular plates with a hole in the middle, the hole in the middle of the sealing plate is equal to the end opening of the first pipe, and the sealing plates are welded to the end surfaces of the first pipe and the second pipe to close the two ends of the sandwich channel; A first through hole and a second through hole are provided on the side wall of the second pipe, the first through hole is connected to the second opening end, and the second end of the stirring shaft is connected to the interlayer channel through the second through hole; the stirring device further comprises a first lip seal, which is a lip seal ring made of modified Teflon material; the first opening end is butt-jointed to one end of the first pipe, and the first lip seal is provided at the connection between the first opening end and the first pipe; the other end of the first pipe and the first end of the stirring shaft are an integrally formed structure; The stirring device also includes a first sleeve, the sleeve formed by the first pipe and the second pipe is inserted into the first sleeve, and the first lip seal is installed in the first sleeve; the sleeve formed by the first pipe and the second pipe can rotate in the first sleeve; the stirring shaft rotates around its rotation axis, and the stirring shaft includes a transverse tube arranged perpendicular to the rotation axis; along the length direction of the transverse tube, a first spoiler blade and a second spoiler blade are installed on the transverse tube; the length directions of the first spoiler blade and the second spoiler blade are both parallel to the rotation axis, the second spoiler blade is arranged between the first spoiler blade and the rotation axis, the width direction of the second spoiler blade and the length direction of the transverse tube form an acute angle, and the width direction of the first spoiler blade is perpendicular to the length direction of the transverse tube.

2. The stirring device according to claim 1, characterized in that: The stirring device also includes a second sleeve, a second lip seal and a third lip seal. The second lip seal and the third lip seal are respectively arranged above and below the first through hole of the second pipe. The second pipe is sleeved in the second sleeve, and the second lip seal and the third lip seal are both installed in the second sleeve. The outer wall of the second lip seal is tightly attached to the inner wall of the second sleeve, and the outer wall of the third lip seal is tightly attached to the inner wall of the second sleeve. The second pipe can rotate in the second sleeve.

3. The stirring device according to claim 2, characterized in that: The second sleeve has a third through hole, the second opening end is inserted into the third through hole, and the second opening end is connected to the interlayer channel through the third through hole and the first through hole in sequence.

4. The stirring device according to claim 2, characterized in that: The second lip seal and the third lip seal are made of modified Teflon material, and the first through hole is a round hole, a square hole or a long hole.

5. The stirring device according to claim 1, characterized in that: The stirring device also includes a driving member, and the outer wall of the second pipe is connected to the driving member through a flat key.

6. The stirring device according to claim 1, characterized in that: A width direction of the second spoiler blade forms an angle with a width direction of the first spoiler blade.

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