Mixing and stirring device and milk powder processing system with same

Abstract

The utility model provides a mixing and stirring device and a milk powder processing system with the mixing and stirring device, and the mixing and stirring device comprises a shell; the stirring structure is rotatably arranged in the shell, and the stirring structure comprises a first stirring shaft and a plurality of first stirring paddles arranged on the first stirring shaft at intervals; the driving part is in driving connection with the stirring structure and is positioned on the outer side of the shell; the detection structure is arranged on the shell and is used for detecting a stirred object; and the controller is connected with the detection structure and the driving part. According to the technical scheme, the problem that in the prior art, materials are prone to being excessively mixed is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing and stirring, in particular to a mixing and stirring device and a milk powder processing system having the same. Background Art

[0002] The uniformity of material mixing is one of the key indicators in the production process and one of the most important indicators in the production process. The uniformity of material mixing is directly related to the stability of product quality. Poor uniformity of material mixing will lead to serious consequences such as uneven product quality and poor product stability. In addition, achieving uniformity of material mixing to meet production requirements in the shortest possible time and using online process control and rapid monitoring technology to monitor the mixing process in real time will not only help shorten the time of material mixing in the production process and improve production efficiency, but also help improve product stability, thereby improving product quality and its technological content.

[0003] In the material mixing process, there are two main issues that require attention: the first is how to achieve efficient material mixing, that is, to complete the uniform mixing of materials in a short time; the second is how to quickly judge whether the uniformity of material mixing meets the production requirements, that is, to quickly and in real time judge the degree of material mixing through online process control and rapid monitoring technology.

[0004] In the related art, when testing material mixing, the mixing device does not stop and directly takes samples for testing. However, since the testing process requires a certain amount of time for sampling and sending samples for testing, the materials are continuously mixed during this time, which can easily lead to excessive mixing of the materials. Utility Model Content

[0005] The main purpose of the utility model is to provide a mixing and stirring device and a milk powder processing system having the same, so as to solve the problem of excessive mixing of materials in the related art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a mixing and stirring device is provided, comprising: a shell; a stirring structure, which is rotatably arranged in the shell, and the stirring structure comprises a first stirring shaft and a plurality of first stirring paddles arranged at intervals on the first stirring shaft; a driving member, which is drivingly connected to the stirring structure and is located on the outside of the shell; a detection structure, which is arranged on the shell and is used to detect the stirred object; and a controller, which is connected to both the detection structure and the driving member.

[0007] Further, the center line of the detection structure is located outside the stirring structure.

[0008] Furthermore, the shell includes a first end wall, a second end wall and a side wall connected between the first end wall and the second end wall, the first stirring shaft passes through the first end wall and the second end wall, and the detection structure is arranged on the first end wall.

[0009] Furthermore, a window portion is provided on the first end wall, and the detection structure is arranged at the window portion.

[0010] Furthermore, the window portion is provided with a transparent plate, and the detection structure includes a spectrometer, which is arranged outside the transparent plate.

[0011] Furthermore, the stirring structure also includes a second stirring shaft and a plurality of second stirring paddles arranged at intervals on the second stirring shaft, the second stirring shaft penetrates the first end wall and the second end wall, and the minimum distance between the first stirring paddle and the second stirring paddle is greater than 0.

[0012] Further, the detection structure is arranged between the first stirring paddle and the second stirring paddle.

[0013] Further, the phase difference between the first stirring paddle and the second stirring paddle is greater than or equal to 0 and less than 1 cycle, and / or the blades of the plurality of first stirring paddles are arranged in parallel, and the blades of the plurality of second stirring paddles are arranged in parallel.

[0014] Furthermore, the side wall includes a first arcuate wall and a second arcuate wall, the first arcuate wall and the second arcuate wall are connected, and a connection point between the first arcuate wall and the second arcuate wall protrudes toward the inside of the shell.

[0015] According to another aspect of the utility model, a milk powder processing system is provided, comprising a mixing and stirring device, and the mixing and stirring device is the stirring device mentioned above.

[0016] By applying the technical solution of the utility model, the stirring structure is rotatably arranged in the shell, specifically, the stirring structure includes a first stirring shaft and a plurality of first stirring paddles, and the plurality of first stirring paddles are arranged on the first stirring shaft at intervals. The driving member is drivingly connected to the stirring structure and can drive the stirring structure to stir. The detection structure is arranged on the shell and is used to detect the stirred object. The controller is connected to both the detection structure and the driving member. Through the above-mentioned arrangement, the detection structure can detect the stirred object in real time, and the controller can control the start and stop of the driving member according to the detection result of the detection structure, that is, when the detection structure detects that the stirred object is mixed qualifiedly, the controller controls the driving member to stop, so that the stirred object can be kept in a state with better mixing effect. Therefore, the technical solution of the present application effectively solves the problem of excessive mixing of materials in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a mixing and stirring device according to the utility model is shown;

[0019] Figure 2 Shows Figure 1 A side view schematic diagram of a mixing and stirring device;

[0020] Figure 3 Shows Figure 1 A cross-sectional schematic diagram of a mixing and stirring device;

[0021] Figure 4 Shows Figure 1 A schematic diagram of the exploded structure of a mixing and stirring device;

[0022] Figure 5 Shows Figure 1 Schematic diagram of the arrangement structure of the mixing and stirring device.

[0023] The above drawings include the following reference numerals:

[0024] 10. Shell; 11. First end wall; 111. Window portion; 12. Second end wall; 13. Side wall; 131. First arc-shaped wall; 132. Second arc-shaped wall; 20. Stirring structure; 21. First stirring shaft; 22. First stirring paddle; 23. Second stirring shaft; 24. Second stirring paddle; 30. Driving member; 40. Detection structure. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] Traditional processes mostly use stirring, grinding, drum mixing, sieving and other methods to achieve material mixing operations. Traditional mixing operations have shortcomings in mixing uniformity and mixing time to varying degrees, making it difficult to meet the requirements of modern production lines for material mixing uniformity. The traditional method of judging whether material mixing meets production requirements mainly relies on offline sampling combined with analytical testing, which has many problems such as long time, high cost, and difficulty in synchronizing analysis results with real-time production line conditions.

[0029] In order to solve the above technical problems, Figures 1 to 5 As shown, in this embodiment, the mixing and stirring device includes: a housing 10, a stirring structure 20, a driving member 30, a detection structure 40 and a controller. The stirring structure 20 is rotatably arranged in the housing 10, and the stirring structure 20 includes a first stirring shaft 21 and a plurality of first stirring paddles 22 arranged at intervals on the first stirring shaft 21. The driving member 30 is drivingly connected to the stirring structure 20 and is located outside the housing 10. The detection structure 40 is arranged on the housing 10 and is used to detect the stirred object. The controller is connected to both the detection structure 40 and the driving member 30.

[0030] Applying the technical solution of this embodiment, the stirring structure 20 is rotatably arranged in the housing 10. Specifically, the stirring structure 20 includes a first stirring shaft 21 and a plurality of first stirring paddles 22, and the plurality of first stirring paddles 22 are arranged on the first stirring shaft 21 at intervals. The driving member 30 is drivingly connected to the stirring structure 20 and can drive the stirring structure 20 to stir. The detection structure 40 is arranged on the housing 10 and is used to detect the stirred object. The controller is connected to both the detection structure 40 and the driving member 30. Through the above-mentioned setting, the detection structure 40 can detect the stirred object in real time, and the controller can control the start and stop of the driving member 30 according to the detection result of the detection structure 40, that is, when the detection structure 40 detects that the stirred object is mixed qualified, the controller controls the driving member 30 to stop, so that the stirred object can be kept in a state with a better mixing effect. Therefore, the technical solution of this embodiment effectively solves the problem of excessive mixing of materials in the related art.

[0031] The mixing and stirring device of this embodiment can realize real-time monitoring of the material mixing process, thereby shortening the material mixing time, improving production efficiency, and further providing guarantee for the stability of product quality.

[0032] like Figure 2 and Figure 3 As shown, in this embodiment, the center line of the detection structure 40 is located outside the stirring structure 20. Such a setting can prevent the stirring structure 20 from affecting the detection structure, thereby preventing the detection result of the detection structure 40 from being inaccurate.

[0033] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, the housing 10 includes a first end wall 11, a second end wall 12 and a side wall 13 connected between the first end wall 11 and the second end wall 12, the first stirring shaft 21 is passed through the first end wall 11 and the second end wall 12, and the detection structure 40 is arranged on the first end wall 11. The first stirring shaft 21 is passed through the first end wall 11 and the second end wall 12, so that the position of the first stirring shaft 21 can be more stable. Similarly, the detection structure 40 is arranged on the first end wall 11, so that the position of the detection structure 40 can be stable and the accuracy of the detection can be guaranteed.

[0034] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, a window portion 111 is provided on the first end wall 11, and the detection structure 40 is provided at the window portion 111. The window portion 111 is provided so that the detection structure 40 can detect the stirred object.

[0035] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, the window portion 111 is provided with a transparent plate, and the detection structure 40 includes a spectrometer, which is arranged outside the transparent plate.

[0036] The spectrometer can be a near-infrared spectrometer, a visible-near-infrared spectrometer, a UV-visible spectrometer, a mid-infrared spectrometer, a terahertz spectrometer, preferably a near-infrared spectrometer.

[0037] Near infrared spectroscopy analysis technology is fast, non-destructive, efficient, and environmentally friendly. With the development of chemometrics and the advancement of computer technology in recent years, near infrared spectroscopy analysis technology has become increasingly mature. As a non-destructive and rapid analysis technology, the application of near infrared spectroscopy in industrial and agricultural production has also been improved day by day, and is being used more and more widely in the field of process control and online analysis. The progress of fast discrete Fourier transform technology, array detectors, and modern computer technology has greatly improved the speed of near infrared spectroscopy analysis; modern near infrared spectroscopy analysis technology can complete spectral data acquisition, data analysis, and result output in 0.1 seconds or even less, thereby realizing rapid analysis of material quality and physical and chemical property parameters on the production line, real-time online monitoring, and process control.

[0038] The transparent plate is made of a material that allows the working light of the spectrometer to pass through, preferably near-infrared quartz or sapphire material; the spectrometer is installed on the shell through the window portion 111; the spectrometer collects real-time spectral data of the stirred object in the shell 10 through the window portion 111 and through the transparent plate, and transmits the collected real-time spectral data to the controller in a wired or wireless manner.

[0039] It should be noted that the detection principle of the infrared detection of mixing uniformity in this embodiment is as follows:

[0040] The material mixing process is to put a variety of materials with different properties into the mixing device for mixing to achieve a uniform state. During the mixing process, the infrared spectrometer will scan different materials, or mixtures of different materials in random proportions, and the spectral information of these materials is very different. As the mixing process continues, all components will reach a uniform distribution state according to the feeding ratio. At this time, the scanned material spectra are consistent, so that it can be determined that the materials in the tank have reached a uniform mixing state. That is, the light emitted by the infrared spectrometer irradiates the material and then reflects back. According to the reflected information, a spectrum is formed to judge the uniformity.

[0041] The infrared detection method of mixing uniformity in this embodiment is as follows:

[0042] There are two types of algorithms for detecting the mixing uniformity of materials based on infrared spectroscopy technology: qualitative and quantitative. One type is based on qualitative methods, such as the moving window method and principal component analysis; the other type is based on quantitative methods, such as the partial least squares method. Compared with qualitative methods, quantitative analysis methods generally require the establishment of quantitative models for analytical components, and require the preparation of a large number of representative samples and the chemical analysis of these samples. Therefore, in actual use, qualitative methods are more commonly used, and the moving window method is the most common.

[0043] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the stirring structure 20 further includes a second stirring shaft 23 and a plurality of second stirring paddles 24 arranged at intervals on the second stirring shaft 23, the second stirring shaft 23 is arranged on the first end wall 11 and the second end wall 12, and the minimum distance between the first stirring paddle 22 and the second stirring paddle 24 is greater than 0. The arrangement of the second stirring shaft 23 and the second stirring paddle 24 can further improve the stirring effect, and at the same time, there is a gap between the first stirring paddle 22 and the second stirring paddle 24, so that the first stirring paddle 22 and the second stirring paddle 24 can avoid interference.

[0044] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the spacing between the plurality of first stirring paddles 22 is equal, or the spacing between the plurality of first stirring paddles 22 is unequal. The spacing between the plurality of second stirring paddles 24 is equal, or the spacing between the plurality of second stirring paddles 24 is unequal, and can be adjusted according to actual work needs. The blades of the first stirring paddle 22 are fixed on the first stirring shaft 21 at an angle perpendicular to the first stirring shaft 21 and are radially extended; the blade surface of each individual blade and the axial direction of the first stirring shaft 21 form a certain degree of angle, and the blade surface of each individual blade and the radial direction of the first stirring shaft 21 form a certain degree of angle, and can be adjusted according to actual work needs; when the first stirring paddle 22 and the second stirring paddle 24 rotate to stir the stirred material, the stirred material can be simultaneously subjected to the force of the axial and radial components of each individual blade, so that the stirred material can be made to undergo a superimposed motion of axial circulation motion and radial circulation motion in the shell 10; the directions of the blade surfaces of each individual blade can be kept consistent, or the blade surfaces of each individual blade can be inclined to each other to form a certain angle, and can be adjusted according to actual work needs.

[0045] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the detection structure 40 is disposed between the first stirring paddle 22 and the second stirring paddle 24. The above arrangement can ensure the detection effect of the detection structure 40.

[0046] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the phase difference between the first stirring paddle 22 and the second stirring paddle 24 is greater than or equal to 0 and less than 1 cycle, and / or the blades of the plurality of first stirring paddles 22 are arranged in parallel, and the blades of the plurality of second stirring paddles 24 are arranged in parallel. The above arrangement can achieve a better stirring effect.

[0047] It should be noted that the above-mentioned one cycle refers to one rotation of the first stirring paddle 22. That is, the phase difference between the first stirring paddle 22 and the second stirring paddle 24 is greater than or equal to 0 and less than 1 cycle, which means that the first stirring paddle 22 rotates first and then the second stirring paddle 24 rotates.

[0048] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, in the present embodiment, the first stirring shaft 21 and the second stirring shaft 23, driven by the driving member 30, can realize the first stirring shaft 21 and the second stirring shaft 23 to rotate in the same direction, rotate towards each other, and rotate in the opposite direction, and can be adjusted according to actual work needs; driven by the driving member 30, the rotation speeds of the first stirring shaft 21 and the second stirring shaft 23 can be controlled separately, and the first stirring shaft 21 and the second stirring shaft 23 can rotate at the same speed or at different speeds, and can be adjusted according to actual work needs; the first stirring shaft 21 and the second stirring shaft 23, driven by the driving member 30 and under the control of the controller, can realize the same direction and same speed rotation, opposite direction and same speed rotation, same direction and different speed rotation, opposite direction and different speed rotation, and can be adjusted according to actual work needs; the driving member 30 drives the first stirring paddle 22 and the second stirring paddle 24 to rotate the stirred object, so that the stirred object undergoes a superimposed motion of axial circulation motion and radial circulation motion in the shell 10.

[0049] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, the side wall 13 includes a first arcuate wall 131 and a second arcuate wall 132, the first arcuate wall 131 and the second arcuate wall 132 are connected, and the connection between the first arcuate wall 131 and the second arcuate wall 132 protrudes toward the inside of the housing 10. The above arrangement can prevent the stirred material from accumulating in the middle of the bottom wall of the housing 10, that is, it can prevent the situation where stirring cannot occur.

[0050] The controller analyzes the real-time spectral data of the material in the shell collected by the spectrometer, and determines whether the mixing uniformity of the stirred material in the shell 10 meets the requirements; when the mixing uniformity of the stirred material in the shell 10 does not meet the requirements, the controller does not output a stop signal, the driving member 30 continues to remain in the on state and continues to drive the stirring structure 20 to rotate, and the stirred material in the shell 10 continues to be mixed under the drive of the first stirring paddle 22 and the second stirring paddle 24; when the mixing uniformity of the stirred material in the shell 10 meets the requirements, the controller outputs a stop signal to the driving member 30, controls the driving member 30 to close, the first stirring paddle 22 and the second stirring paddle 24 stop rotating, and the stirring of the stirred material in the shell 10 stops.

[0051] like Figures 1 to 5 As shown, the mixing and stirring device of this embodiment has the following advantages:

[0052] Multiple mixing methods effectively improve the mixing efficiency. The dual stirring paddles (the first stirring paddle 22 and the second stirring paddle 24) are used to fully stir the materials in the housing 10. According to actual work needs, the first stirring paddle 22 and the second stirring paddle 24 can be adjusted to realize multiple stirring methods such as same-direction and same-speed rotation, opposite-direction and same-speed rotation, opposite-direction and different-speed rotation, and opposite-phase and different-speed rotation. The phase difference between the first stirring paddle 22 and the second stirring paddle 24 can be adjusted between 0 and 1 cycles according to actual work needs. Therefore, the material mixing efficiency can be significantly improved compared with the traditional single stirring paddle.

[0053] The first stirring paddle 22 and the second stirring paddle 24 further improve the mixing efficiency. There are multiple first stirring paddles 22 and second stirring paddles 24. The first stirring paddle 22 uses multiple individual blades, and the second stirring paddle 24 uses multiple individual blades. The blade surface of each individual blade is at a certain angle to the axial and radial directions of the first stirring shaft 21 and the second stirring shaft 23, respectively. Therefore, in the mixing process, dynamic components can be generated in the axial and radial directions of the first stirring paddle 22 and the second stirring paddle 24, respectively, thereby promoting the superposition of axial circulation motion and radial circulation motion of the stirred material in the shell 10, thereby greatly improving the mixing efficiency. In addition, the blade surfaces of each independent blade can maintain a consistent direction or have a certain angle according to actual work needs, which can meet the requirements of materials of different properties in the mixing process.

[0054] Realize efficient real-time monitoring of mixing uniformity. Use near-infrared spectrometer to monitor the stirred material in the shell in real time, which can greatly shorten the detection time compared with the traditional sampling offline analysis method, and obtain real-time data on the uniformity of material mixing, effectively solving the problem of inaccurate results due to the inconsistency between the traditional sampling offline analysis results and the current real-time situation of the materials on the production line.

[0055] In summary, the mixing and stirring device of this embodiment can solve the problems encountered in actual work, such as long material mixing time, inaccurate judgment of material mixing degree, low production efficiency and poor product quality stability caused by this. The technical solution of this embodiment can greatly shorten the time for materials to be mixed evenly during the production process, thereby realizing the efficiency and automation of the material mixing link, effectively improving production efficiency, and providing guarantee for the stability of product quality, thereby providing technical support and solutions for realizing automated control of the production process, labor-saving detection, and improving the technological content and market competitiveness of products.

[0056] According to another aspect of the present application, a milk powder processing system is provided. The milk powder processing system of this embodiment includes a mixing and stirring device, which is the stirring device mentioned above. The mixing and stirring device can detect the stirred object in real time, thereby ensuring the mixing effect and the production efficiency.

[0057] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mixing and stirring device, characterized in that: include: Housing (10); a stirring structure (20), the stirring structure (20) being rotatably disposed in the housing (10), the stirring structure (20) comprising a first stirring shaft (21) and a plurality of first stirring paddles (22) disposed at intervals on the first stirring shaft (21); A driving member (30) is drivingly connected to the stirring structure (20) and is located outside the housing (10); A detection structure (40) is arranged on the housing (10) and is used to detect the stirred object; A controller is connected to both the detection structure (40) and the driving member (30).

2. The mixing and stirring device according to claim 1, characterized in that: The center line of the detection structure (40) is located outside the stirring structure (20).

3. The mixing and stirring device according to claim 1, characterized in that: The shell (10) comprises a first end wall (11), a second end wall (12) and a side wall (13) connected between the first end wall (11) and the second end wall (12); the first stirring shaft (21) passes through the first end wall (11) and the second end wall (12); and the detection structure (40) is arranged on the first end wall (11).

4. The mixing and stirring device according to claim 3, characterized in that: A window portion (111) is provided on the first end wall (11), and the detection structure (40) is arranged at the window portion (111).

5. The mixing and stirring device according to claim 4, characterized in that: The window portion (111) is provided with a transparent plate, and the detection structure (40) comprises a spectrometer, which is arranged outside the transparent plate.

6. The mixing and stirring device according to claim 3, characterized in that: The stirring structure (20) further comprises a second stirring shaft (23) and a plurality of second stirring paddles (24) arranged at intervals on the second stirring shaft (23); the second stirring shaft (23) passes through the first end wall (11) and the second end wall (12); and the minimum distance between the first stirring paddle (22) and the second stirring paddle (24) is greater than 0.

7. The mixing and stirring device according to claim 6, characterized in that: The detection structure (40) is arranged between the first stirring paddle (22) and the second stirring paddle (24).

8. The mixing and stirring device according to claim 6, characterized in that: The phase difference between the first stirring paddle (22) and the second stirring paddle (24) is greater than or equal to 0 and less than 1 cycle, and / or a plurality of blades of the first stirring paddle (22) are arranged in parallel, and a plurality of blades of the second stirring paddle (24) are arranged in parallel.

9. The mixing and stirring device according to claim 3, characterized in that: The side wall (13) comprises a first arcuate wall (131) and a second arcuate wall (132), wherein the first arcuate wall (131) and the second arcuate wall (132) are connected, and a connection point between the first arcuate wall (131) and the second arcuate wall (132) protrudes toward the interior of the shell (10).

10. A milk powder processing system, comprising a mixing and stirring device, characterized in that: The mixing and stirring device is the stirring device according to any one of claims 1 to 9.

Images