Special powder mixing production line for rare disease food
By using multi-stage mixing equipment and a vacuum conveying system, the problems of uniformity and quality stability in the mixing process of rare disease food powder formulations have been solved, achieving efficient and uniform mixing and quality stability of rare disease food powders.
Patent Information
- Application Number
- CN202423172914.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In the existing technology, it is difficult to control the uniformity and quality stability of materials during the mixing process of powdered formulations for rare disease foods, resulting in poor product uniformity.
By employing multi-stage mixing equipment and a vacuum conveying system, multi-stage mixing and dust-free conveying are achieved through primary, secondary, and tertiary mixing equipment and buffer bins, combined with weighing and vacuuming modules, ensuring uniform mixing of materials.
It improves the uniformity of mixing and the stability of product quality, avoids the uniformity control problem caused by one-time mixing in existing technologies, and ensures the uniformity and quality stability of rare disease food formula powder.
Smart Images
Figure CN223587029U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material mixing technology, and in particular to a powder mixing production line for rare disease foods. Background Technology
[0002] In foods for special medical purposes for rare diseases, amino acid metabolism disorder formula foods are commonly in powder form. These formula foods are made by mixing L-amino acids other than phenylalanine with nutrients such as fat, carbohydrates, vitamins and minerals in a certain proportion to create phenylalanine-free formula powder.
[0003] In the production of powder-based food products such as those mentioned above, it is usually necessary to mix multiple materials. Currently, multiple materials are added to a mixing device in a fixed ratio, and then the powder-based product is obtained by controlling the mixing time.
[0004] In existing material mixing processes, due to the large number of materials that need to be mixed and the significant differences in their proportions, it is difficult to control the timing of uniform mixing in a one-time addition method. This results in poor uniformity of powder formulation products, thus failing to guarantee the stability of product quality. Utility Model Content
[0005] The purpose of this invention is to provide a powder mixing production line specifically for rare disease foods, which enables multi-stage mixing, helps to ensure the uniformity of mixing, and thus further ensures the uniformity and quality stability of the formulated powder.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A powder mixing production line specifically for rare disease foods includes:
[0008] A primary mixing device is used for mixing primary materials, wherein the original mixing ratio of the primary materials is less than a first preset value, and the primary mixing device is used to increase the mixing ratio of the primary materials.
[0009] A secondary mixing device is located downstream of the primary mixing device, where the primary material, which has been proportionally scaled up, and the newly added secondary material enter the secondary mixing device for mixing.
[0010] A tertiary mixing device is located downstream of the secondary mixing device. The primary material, the secondary material, and the newly added tertiary material that have been mixed in the secondary mixing device enter the tertiary mixing device for further mixing.
[0011] The first buffer bin is provided with a first weighing mechanism. The first-level material and the second-level material mixed by the secondary mixing device enter the first buffer bin. When the total weight of the first-level material and the second-level material reaches a second preset value, the first-level material, the second-level material and the newly added third-level material mixed by the secondary mixing device enter the third mixing device for mixing.
[0012] As an optional scheme of the powder mixing production line special for rare disease food, the powder mixing production line special for rare disease food further comprises a feeding station, the feeding station is communicated with the secondary mixing device through a first pipeline, the feeding station is communicated with the first buffer bin through a second pipeline, and the secondary mixing device is communicated with the first buffer bin through a third pipeline.
[0013] As an optional scheme of the powder mixing production line special for rare disease food, the powder mixing production line special for rare disease food further comprises a transfer mechanism, the first-level material mixed by the first mixing device is transferred to the feeding station through the transfer mechanism.
[0014] As an optional scheme of the powder mixing production line special for rare disease food, the secondary mixing device is provided with a first vacuumizing module, the first vacuumizing module is used for vacuumizing the secondary mixing device, and the first vacuumizing module is used for sucking the first-level material and the second-level material into the secondary mixing device and mixing in the secondary mixing device and then entering the first buffer bin.
[0015] As an optional scheme of the powder mixing production line special for rare disease food, the first vacuumizing module comprises a first vacuum pump, a first vacuum pipeline and a first filter arranged on the first vacuum pipeline, and the first vacuum pump is communicated with the secondary mixing device through the first vacuum pipeline.
[0016] As an optional scheme of the powder mixing production line special for rare disease food, the first buffer bin is provided with a second vacuumizing module, the second vacuumizing module is used for sucking the third-level material into the first buffer bin, and when the total weight of the first-level material, the second-level material and the third-level material reaches a third preset value, the first-level material, the second-level material and the third-level material are sucked into the third mixing device for mixing.
[0017] As an optional scheme of the powder mixing production line special for rare disease food, the second vacuumizing module comprises a second vacuum pump, a second vacuum pipeline and a second filter arranged on the second vacuum pipeline, and the second vacuum pump is communicated with the first buffer bin through the second vacuum pipeline.
[0018] As an optional scheme of the powder mixing production line special for rare disease food, the powder mixing production line special for rare disease food further comprises a second buffer bin in communication with the third-stage mixing device; a third vacuumizing module is arranged on the second buffer bin, and the third vacuumizing module is used for putting the first-stage material, the second-stage material and the third-stage material mixed in the third-stage mixing device into the second buffer bin.
[0019] As an optional scheme of the powder mixing production line special for rare disease food, the third vacuumizing module comprises a third vacuum pump, a third vacuum pipeline and a third filter arranged on the third vacuum pipeline, and the third vacuum pump is in communication with the second buffer bin through the third vacuum pipeline.
[0020] As an optional scheme of the powder mixing production line special for rare disease food, the powder mixing production line special for rare disease food further comprises a filling machine in communication with the second buffer bin through a fourth pipeline, a discharging valve is arranged on the fourth pipeline, a second weighing mechanism is arranged in the second buffer bin, and the discharging valve is opened when the total weight of the first-stage material, the second-stage material and the third-stage material in the second buffer bin reaches a fourth preset value.
[0021] Beneficial effects:
[0022] In the utility model, the first-stage mixing device is used for amplifying and mixing the first-stage material, the first-stage material with a small proportion can be fully mixed for the first time through the first-stage mixing device, the initial proportion of the first-stage material mixed through the first-stage mixing device and the newly added second-stage material is similar, and the two are simultaneously mixed in the second-stage mixing device, the second-stage mixing device ensures that the first-stage material with an amplification proportion and the newly added second-stage material are fully mixed, and the uniformity of mixing is gradually increased. Further, the mixed first-stage material and second-stage material are put into the first buffer bin, the mixed first-stage material and second-stage material are weighed through the first weighing mechanism, the weight is matched with the weight of the third-stage material to be put in when the weight meets the second preset value, at this time, the mixed first-stage material, second-stage material and newly added third-stage material are mixed in the third-stage mixing device. The first-stage material, second-stage material and newly added third-stage material are fully mixed through the third-stage mixing device, at this time, the uniformity of mixing is improved, the production line can mix multi-component and different proportion formula powders in multiple stages, effectively avoids the problem that all formula components are mixed at one time in the prior art, and it is difficult to control the optimal time node of the uniformity of mixing, the production line can realize multi-stage mixing, is beneficial to ensuring the uniformity of mixing, and further ensures the uniformity of formula powder and the stability of quality. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1It is the process structure diagram of the powder mixing production line special for rare disease food provided by the embodiment of the utility model.
[0024] In the figure,
[0025] 1, primary mixing equipment;
[0026] 2, secondary mixing equipment;21, first vacuum pumping module;211, first vacuum pump;212, first vacuum pipeline;213, first filter;
[0027] 3, tertiary mixing equipment;
[0028] 4, first buffer warehouse;41, second vacuum pumping module;411, second vacuum pump;412, second vacuum pipeline;413, second filter;42, first weighing mechanism;
[0029] 5, feeding station;
[0030] 61, first pipeline;62, second pipeline;63, third pipeline;
[0031] 7, transfer mechanism;
[0032] 8, second buffer warehouse;81, third vacuum pumping module;811, third vacuum pump;812, third vacuum pipeline;813, third filter;82, second weighing mechanism;
[0033] 9, filling machine;91, fourth pipeline;92, discharging valve. DETAILED DESCRIPTION
[0034] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0035] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated;It can be mechanically connected, or electrically connected;It can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0038] Please see the appendix Figure 1 This embodiment relates to a powder mixing production line (hereinafter referred to as "production line") specifically for rare disease foods. For example, this production line can be used for formula powders for amino acid metabolism disorders, which are composed of a mixture of powders with different ingredients. Specifically, this production line includes a primary mixing device 1, a secondary mixing device 2, a tertiary mixing device 3, and a first buffer bin 4. The primary mixing device 1 is used for mixing primary materials. The original mixing ratio of the primary materials is less than a first preset value. The primary mixing device 1 is used to increase the mixing ratio of the primary materials. The secondary mixing device 2 is located downstream of the primary mixing device 1. The primary materials with increased ratio and the newly added secondary materials enter the secondary mixing device 2 for mixing. The tertiary mixing device 3 is located downstream of the secondary mixing device 2. The primary materials, secondary materials and newly added tertiary materials after being mixed by the secondary mixing device 2 enter the tertiary mixing device 3 for mixing. The first buffer bin 4 is equipped with a first weighing mechanism 42. The primary materials and secondary materials after being mixed by the secondary mixing device 2 enter the first buffer bin 4. When the total weight of the primary materials and secondary materials reaches a second preset value, the primary materials, secondary materials and newly added tertiary materials after being mixed by the secondary mixing device 2 enter the tertiary mixing device 3 for mixing.
[0039] Specifically, the primary mixing device 1 can adopt a three-dimensional mixer, which is a mechanical device for uniformly mixing two or more materials by mechanical force and gravity. It performs translation, rotation, rolling and other movements in a cubic three-dimensional space, so that the materials are in a complex motion state of "rotary flow-translation-inverted falling body" in the mixing cavity. This motion state continuously pushes the materials and generates an alternating pulse, so that each particle in the mixed materials has different motion states, and each particle constantly changes its position in frequent motion diffusion, thereby achieving uniform mixing.
[0040] The primary mixing device 1 is used for amplifying and mixing the primary material. In this embodiment, the ingredients in the formula powder are divided into three levels according to the proportion, which are a small proportion of the primary material, a medium proportion of the secondary material and a large proportion of the tertiary material. The material with a proportion less than a first preset value is uniformly the primary material. The primary material needs to be amplified in proportion in the primary mixing device 1 due to its small specific gravity, that is, the proportion after mixing is greater than the first preset value. Thus, the first sufficient mixing of the small proportion of the primary material can be ensured through the primary mixing process.
[0041] The initial proportion of the primary material mixed by the primary mixing device 1 and the newly added secondary material is similar, and then the two are simultaneously put into the secondary mixing device 2 for mixing. The proportion of the primary material mixed by the secondary mixing device 2 decreases and gradually approaches the final formula proportion. The secondary mixing device 2 ensures that the amplified proportion of the primary material and the newly added secondary material are fully mixed, and the uniformity of mixing is gradually increased.
[0042] The secondary mixing device 2 is a single-paddle mixer, also known as a single-shaft paddle mixer. Its working principle is that the shaft is rotated by a motor, and the paddle on the shaft stirs and mixes the materials. The design of the paddle enables the materials to circulate in the mixer, thereby achieving rapid and uniform mixing effect.
[0043] Further, the mixed primary material and the secondary material are put into the first buffer bin 4, and the first weighing mechanism 42 is used to weigh the mixed primary material and the secondary material. When the weight meets the weight of the tertiary material to be put in, that is, the weight reaches a second preset value, the mixed primary material, the secondary material and the newly added tertiary material are put into the tertiary mixing device 3 for mixing. The tertiary mixing device 3 ensures that the primary material, the secondary material and the newly added tertiary material are fully mixed, and the uniformity of mixing is further improved.
[0044] The third mixing device 3 is a double-paddle mixer, and the working principle of the double-paddle mixer is based on two main components: a barrel and two stirring shafts with special angle paddles. The two stirring shafts keep relative rotation during work to bring the material to a complex and efficient mixing process.
[0045] The production line can mix multiple formula components and formula powder with different proportions in multiple stages, effectively avoiding the problem that in the prior art, all formula components are put into the mixer at one time, and it is difficult to control the optimal time node of uniform mixing. The use of the production line realizes multi-stage mixing, which is conducive to ensuring the uniformity of the mixing, thereby further ensuring the uniformity and quality stability of the formula powder.
[0046] Optionally, the production line further comprises a feeding station 5, the feeding station 5 is communicated with the second mixing device 2 through a first pipeline 61, the feeding station 5 is communicated with the first buffer bin 4 through a second pipeline 62, and the second mixing device 2 is communicated with the first buffer bin 4 through a third pipeline 63.
[0047] In this embodiment, the first material, the second material and the third material are all put into the feeding station 5 and then sequentially transported to the second mixing device 2 and the first buffer bin 4. Specifically, the first material and the second material in the feeding station 5 are transported to the second mixing device 2 through the first pipeline 61 by negative pressure, and then the third material in the feeding station 5 is transported to the first buffer bin 4 through the second pipeline 62 by negative pressure. Adaptively, the first material and the second material in the second mixing device 2 are transported to the first buffer bin 4 through the third pipeline 63 by negative pressure. The first pipeline 61, the second pipeline 62 and the third pipeline 63 are all conveying pipes, and the negative pressure ensures that the first material, the second material and the third material are transported in the conveying pipes by vacuumizing, avoids the formula powder from contacting air, ensures the quality of the formula powder, and also ensures the dust-free effect of the conveying process.
[0048] The feeding station 5 is used to ensure the dust-free environment during feeding. The feeding station 5 usually has a dust removal system, and the built-in air induction dust collection filter can perform dust collection treatment on the dust, and the filter can be cleaned by reverse compressed air injection to ensure the dust removal effect. The feeding station 5 can effectively prevent dust from flying during feeding and reduce material loss, thereby avoiding waste.
[0049] Optionally, the production line further comprises a transfer mechanism 7, and the first material mixed by the first mixing device 1 is transferred to the feeding station 5 through the transfer mechanism 7.
[0050] In this embodiment, the transfer mechanism 7 can adopt a dust-free transfer powder car, and the first material mixed by the first mixing device 1 is put into the feeding station 5 through the dust-free transfer powder car. The transfer mechanism 7 can ensure the flexibility of material transfer.
[0051] Optionally, the secondary mixing device 2 is provided with a first vacuumizing module 21, which is used to vacuumize the secondary mixing device 2, and to suck the primary material and the secondary material into the secondary mixing device 2 through the first vacuumizing module 21, and to mix the primary material and the secondary material in the secondary mixing device 2 and then enter the first buffer bin 4.
[0052] In the embodiment, before the mixing cavity of the secondary mixing device 2 works, the mixing cavity of the secondary mixing device 2 is first vacuumized by the first vacuumizing module 21, and when the internal pressure of the mixing cavity is reduced to a preset value, the first pipeline 61 can be opened, and the primary material and the secondary material in the feeding station 5 are sucked into the secondary mixing device 2 by negative pressure, at this time, the secondary mixing device 2 is started and the primary material and the secondary material are fully mixed, and then the mixed primary material and secondary material are sucked into the first buffer bin 4 by the third pipeline 63 through the first vacuumizing module 21.
[0053] Further, the first vacuumizing module 21 comprises a first vacuum pump 211, a first vacuum pipeline 212 and a first filter 213 arranged on the first vacuum pipeline 212, and the first vacuum pump 211 is communicated with the secondary mixing device 2 through the first vacuum pipeline 212.
[0054] In the embodiment, the first vacuum pump 211 is started, and the secondary mixing device 2 is first vacuumized through the first vacuum pipeline 212, and in the process of vacuumizing, the air sucked out can be filtered through the first filter 213 to avoid impurities in the air entering the inside of the first vacuum pump 211, and the first filter 213 also has the effect of filtering and sterilizing, further avoiding bacteria from entering the inside of the first vacuum pump 211 to pollute the first vacuum pump 211.
[0055] Optionally, the first buffer bin 4 is provided with a second vacuumizing module 41, which is used to suck the tertiary material into the first buffer bin 4, and when the total weight of the primary material, the secondary material and the tertiary material reaches a third preset value, to suck the primary material, the secondary material and the tertiary material into the tertiary mixing device 3 for mixing.
[0056] In the embodiment, the first buffer bin 4 is provided with the second vacuumizing module 41 on one side, which can first vacuumize the mixing cavity in the tertiary mixing device 3, and then suck the tertiary material into the first buffer bin 4 through the second pipeline 62, at this time, the primary material and the secondary material in the first buffer bin 4 have a certain weight and are mixed by the secondary mixing device 2, and the first buffer bin 4 is used to temporarily store the primary material, the secondary material and the tertiary material, and when the total weight of the primary material, the secondary material and the tertiary material reaches the third preset value, the primary material, the secondary material and the tertiary material are ready to be put into the tertiary mixing device 3.
[0057] Further, the second vacuumizing module 41 comprises a second vacuum pump 411, a second vacuum pipeline 412 and a second filter 413 arranged on the second vacuum pipeline 412, and the second vacuum pump 411 is communicated with the first buffer bin 4 through the second vacuum pipeline 412.
[0058] In the embodiment, the second vacuum pump 411, the second vacuum pipeline 412 and the second filter 413 are substantially identical in structure with the corresponding first vacuum pump 211, the first vacuum pipeline 212 and the first filter 213, and the extracted air can be filtered through the second filter 413, so as to filter impurities and sterilize, thereby avoiding pollution to the second vacuum pump 411.
[0059] Optionally, the production line further comprises a second buffer bin 8, and the second buffer bin 8 is communicated with the third mixing device 3; and the second buffer bin 8 is provided with a third vacuumizing module 81, and the third vacuumizing module 81 is used for putting the mixed first material, the second material and the third material in the third mixing device 3 into the second buffer bin 8.
[0060] In the embodiment, the second buffer bin 8 is identical in structure with the first buffer bin 4, and the mixed first material, the second material and the third material in the third mixing device 3 can be directly put into the second buffer bin 8 through the third vacuumizing module 81, and the whole process is completed in a vacuum environment, so as to avoid contact of the mixed material with air, thereby ensuring the quality of the mixed formula powder. The third vacuumizing module 81 comprises a third vacuum pump 811, a third vacuum pipeline 812 and a third filter 813 arranged on the third vacuum pipeline 812, the third vacuum pump 811 is communicated with the second buffer bin 8 through the third vacuum pipeline 812, and the extracted air can be filtered through the third filter 813, so as to filter impurities and sterilize, thereby avoiding pollution to the third vacuum pump 811.
[0061] Optionally, the production line further comprises a filling machine 9, and the filling machine 9 is communicated with the second buffer bin 8 through a fourth pipeline 91, the fourth pipeline 91 is provided with a discharging valve 92, the second buffer bin 8 is provided with a second weighing mechanism 82, and when the total weight of the first material, the second material and the third material in the second buffer bin 8 reaches a fourth preset value, the discharging valve 92 is opened.
[0062] In the embodiment, the second buffer bin 8 also has a second weighing mechanism 82 inside, and the discharging valve 92 is an electric control device, when the total weight of the mixed first material, second material and third material reaches a fourth preset value, the internal control program can control the discharging valve 92 to open, so that the formula powder in the second buffer bin 8 is poured into the filling machine 9 through the fourth pipeline 91, the filling machine 9 is used to redistribute the formula powder into a holding tank, and then the formula powder is poured and sealed by a sealing machine, after the pouring and sealing is completed, the production line can further perform metal detection, tank sorting, cap pressing, code printing, re-inspection and warehousing, and the related equipment involved in the subsequent process can adopt the existing equipment and be arranged in sequence downstream of the filling machine 9.
[0063] In the embodiment, the first buffer bin 4 and the second buffer bin 8 both have a weighing function, which is used to weigh the internal material, and the real-time weight of the internal material of the first buffer bin 4 and the second buffer bin 8 can be monitored and fed back through the control system, so as to facilitate the operator to adjust the material flow of the entire production line and improve the adaptability of the production line, thereby reducing residual material and ensuring the balance of the entire material flow.
[0064] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A powder mixing production line specifically for foods for rare diseases, characterized in that, include: A primary mixing device (1) is used for mixing primary materials, wherein the original mixing ratio of the primary materials is less than a first preset value, and the primary mixing device (1) is used to increase the mixing ratio of the primary materials. A secondary mixing device (2) is located downstream of the primary mixing device (1). The primary material, which has been proportionally amplified, and the newly added secondary material enter the secondary mixing device (2) for mixing. The tertiary mixing device (3) is located downstream of the secondary mixing device (2). The primary material, the secondary material, and the newly added tertiary material after being mixed by the secondary mixing device (2) enter the tertiary mixing device (3) for mixing. The first buffer bin (4) is equipped with a first weighing mechanism (42). The primary material and the secondary material after being mixed by the secondary mixing device (2) enter the first buffer bin (4). When the total weight of the primary material and the secondary material reaches a second preset value, the primary material, the secondary material and the newly added tertiary material after being mixed by the secondary mixing device (2) enter the tertiary mixing device (3) for mixing.
2. The powder mixing production line for rare disease foods according to claim 1, characterized in that, The powder mixing production line for rare disease food also includes a feeding station (5), which is connected to the secondary mixing equipment (2) through a first pipeline (61), and the feeding station (5) is connected to the first buffer bin (4) through a second pipeline (62). The secondary mixing equipment (2) is connected to the first buffer bin (4) through a third pipeline (63).
3. The powder mixing production line for rare disease foods according to claim 2, characterized in that, The powder mixing production line for rare disease food also includes a transfer mechanism (7), through which the primary material after being mixed by the primary mixing equipment (1) is transferred to the feeding station (5).
4. The powder mixing production line for rare disease foods according to claim 1, characterized in that, The secondary mixing device (2) is provided with a first vacuum module (21). The first vacuum module (21) is used to vacuum the secondary mixing device (2) and to suck the primary material and the secondary material into the secondary mixing device (2) through the first vacuum module (21), and after mixing in the secondary mixing device (2), they enter the first buffer chamber (4).
5. The powder mixing production line for rare disease foods according to claim 4, characterized in that, The first vacuum module (21) includes a first vacuum pump (211), a first vacuum line (212) and a first filter (213) disposed on the first vacuum line (212). The first vacuum pump (211) is connected to the secondary mixing device (2) through the first vacuum line (212).
6. The powder mixing production line for rare disease foods according to claim 1, characterized in that, The first buffer chamber (4) is provided with a second vacuum module (41). The second vacuum module (41) is used to suck the third-level material into the first buffer chamber (4), and when the total weight of the first-level material, the second-level material and the third-level material reaches a third preset value, the first-level material, the second-level material and the third-level material are sucked into the third-level mixing device (3) for mixing.
7. The powder mixing production line for rare disease foods according to claim 6, characterized in that, The second vacuum module (41) includes a second vacuum pump (411), a second vacuum line (412), and a second filter (413) disposed on the second vacuum line (412). The second vacuum pump (411) is connected to the first buffer chamber (4) through the second vacuum line (412).
8. The powder mixing production line for rare disease foods according to claim 1, characterized in that, The powder mixing production line for rare disease food also includes a second buffer chamber (8), which is connected to the three-stage mixing equipment (3); the second buffer chamber (8) is provided with a third vacuum module (81), which is used to put the first-stage material, the second-stage material and the third-stage material that have been mixed in the three-stage mixing equipment (3) into the second buffer chamber (8).
9. The powder mixing production line for rare disease foods according to claim 8, characterized in that, The third vacuum module (81) includes a third vacuum pump (811), a third vacuum line (812), and a third filter (813) disposed on the third vacuum line (812). The third vacuum pump (811) is connected to the second buffer chamber (8) through the third vacuum line (812).
10. The powder mixing production line for rare disease foods according to claim 8, characterized in that, The powder mixing production line for rare disease food also includes a filling machine (9), which is connected to the second buffer bin (8) through a fourth pipeline (91). The fourth pipeline (91) is equipped with a discharge valve (92), and the second buffer bin (8) is equipped with a second weighing mechanism (82). When the total weight of the primary material, the secondary material and the tertiary material in the second buffer bin (8) reaches a fourth preset value, the discharge valve (92) is opened.