A mixing device for a freeze-dried probiotic production line

Abstract

The utility model provides a kind of mixing device for freeze-drying probiotic production line, it is related to probiotic freeze-drying production device technical field, including mixing barrel, stirring device and distributor, the mixing barrel top portion is provided with top cover, mixing barrel bottom is equipped with discharge gate, stirring device is evenly spaced transversely installed in mixing barrel around mixing barrel axis line, the top cover of distributor is coaxial with the mixing barrel and is installed, the distributor bottom is provided with several groups of material distribution hole corresponding with the direction of stirring device in mixing barrel, the application can solve the problem that traditional liquid needs to be combined with the mode that single-point feeding and high-speed paddle type mechanical stirring are combined to form local concentration too high, mixing is not uniform and high shear force destroys bacterial cell membrane structure, causes the problem of active bacteria survival rate decline.

Description

Technical Field

[0001] This utility model relates to the technical field of probiotic freeze-drying production equipment, specifically to a mixing device for a freeze-dried probiotic production line. Background Technology

[0002] Probiotics are widely used in the food, pharmaceutical, and health product industries. They exert their effects by colonizing the gut with a sufficient number of live bacteria. However, probiotics are extremely sensitive to the external environment, especially under conditions of high temperature, high humidity, or oxygen exposure, which can easily lead to inactivation and a significant reduction in product stability and efficacy. To extend shelf life and maintain bacterial activity, freeze-drying technology has become the mainstream method for preserving probiotics. This method uses low-temperature dehydration to convert the bacteria into a dry, dormant state, allowing them to maintain their activity at room temperature for an extended period.

[0003] In traditional probiotic freeze-drying processes, the bacterial solution needs to be thoroughly mixed with a preservative (such as trehalose, skim milk, glycerin, etc.) before entering the freeze-drying process. However, existing mixing processes often combine single-point feeding with high-speed paddle mechanical stirring, which has the following drawbacks:

[0004] When the preservative is directly injected into the mixing tank, it can easily lead to excessively high local concentrations. This is especially true for high-viscosity materials such as glycerol and trehalose syrup, which are difficult to diffuse quickly, resulting in uneven mixing and large concentration gradients that cause distribution deviations in the bacterial community. Traditional high-speed paddle mixers not only generate high shear forces that damage the cell membrane structure of the bacteria, reducing the survival rate of live bacteria, but also easily leave unmixed "dead zones," further exacerbating the distribution deviations and ultimately affecting the uniformity and stability of the freeze-dried product. Therefore, this application proposes a mixing device for a freeze-dried probiotic production line. Utility Model Content

[0005] To overcome the problems in the background technology, this utility model provides a mixing device for a freeze-dried probiotic production line, which solves the problems that the traditional method of adding liquid and preservative through single-point feeding and high-speed paddle mechanical stirring can easily lead to excessively high local concentrations, uneven mixing, and high shear force that damages the cell membrane structure of bacteria, resulting in a decrease in the survival rate of live bacteria.

[0006] A mixing device for a freeze-dried probiotic production line includes a mixing cylinder, a stirring device, and a distributor. The mixing cylinder has a top cover and a discharge port at the bottom. The stirring device is installed horizontally inside the mixing cylinder at even intervals around the axis of the mixing cylinder. The distributor is coaxially installed with the top cover of the mixing cylinder. The bottom of the distributor has several sets of distribution holes corresponding to the direction of the stirring device inside the mixing cylinder.

[0007] Furthermore, the material distributor includes a material distribution cylinder, a sealing plate, a connecting shaft, a drive motor, a feeding port, and an air source port. The material distribution cylinder is coaxially mounted with the top cover. The lower part of the material distributor is a cone extending into the mixing cylinder. The material distribution hole is opened on the wall of the cone at the lower part of the material distributor. The sealing plate is rotatably installed inside the cone to cover the material distribution hole. The drive motor is coaxially mounted on the top of the material distributor. The lower end of the connecting shaft is connected to the center of the sealing plate, and the upper end of the connecting shaft is connected to the power output end of the drive motor. The feeding port and the air source port are connected to the upper part of the material distributor.

[0008] Furthermore, the stirring device includes a stirring motor, a turntable, and stirring rods. The stirring motor is installed at even intervals around the axis of the mixing cylinder and on the side wall of the mixing cylinder. The power output end of the stirring motor is arranged laterally inside the mixing cylinder and faces the center of the mixing cylinder. The center of the turntable is connected to the power output end of the stirring motor. The stirring rods are round rods with one end fixed to the turntable. The stirring rods are installed in a circle at even intervals on the turntable.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. The feeder 3 adopts a conical cylinder wall design. The opening and closing of the feed hole is controlled by the sealing plate. Combined with the high-pressure airflow, the liquid is sprayed out evenly, avoiding the concentration gradient caused by single-point concentrated feeding. Trehalose syrup, skim milk and glycerin can be injected in stages through the feed interface to achieve layered diffusion. The initial dispersion is improved to avoid excessive local concentration, which is conducive to subsequent uniform stirring and mixing.

[0011] 2. Multiple stirring motors 21 surrounding the side wall of the mixing cylinder 1 drive the turntable 22 to rotate synchronously. The stirring rod 23 forms a radial and axial composite flow field, eliminating dead zones in the mixing. Compared with traditional impellers, the round rod-shaped stirring rod 23 has a lower shear rate and a higher survival rate of live bacteria. Attached Figure Description

[0012] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a top view of the structure of this utility model;

[0015] Figure 3 This is a bottom view of the structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 5 This is a schematic diagram of the fabric feeder structure of this utility model;

[0018] Figure 6 This is a schematic diagram of the internal structure of the fabric feeder of this utility model;

[0019] Figure 7 This is a schematic diagram of the stirring device of this utility model.

[0020] 1-Mixing cylinder, 11-Top cover, 12-Discharge port, 2-Stirring device, 21-Stirring motor, 22-Turntable, 23-Stirring rod, 3-Distributor, 31-Distributor cylinder, 32-Sealing plate, 33-Connecting shaft, 34-Drive motor, 35-Feeding interface, 36-Air source interface. Detailed Implementation

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0022] See Figure 1-6 This utility model proposes a mixing device for a freeze-dried probiotic production line, including a mixing cylinder 1, a stirring device 2, and a distributor 3. The mixing cylinder 1 is provided with a top cover 11 and a discharge port 12 at the bottom for discharging material. The stirring device 2 is installed horizontally inside the mixing cylinder 1 at even intervals around the axis of the mixing cylinder 1 to simulate the stirring action of an egg beater. The distributor 3 is coaxially installed with the top cover 11 of the mixing cylinder 1. The bottom of the distributor 3 is provided with several sets of distributing holes 30 corresponding to the direction of the stirring device 2 inside the mixing cylinder 1, so that the liquid is evenly distributed to the stirring device 2.

[0023] See Figure 1-6 The feeder 3 includes a feed cylinder 31, a sealing plate 32, a connecting shaft 33, a drive motor 34, a feed inlet 35, and an air source inlet 36. The feed cylinder 31 is coaxially mounted with the top cover 11. The lower part of the feeder 3 is a cone extending into the mixing cylinder 1. The feed hole 30 is opened on the cone wall at the lower part of the feeder 3, allowing the liquid to pass through the feed hole 30. The sealing plate 32 is rotatably mounted inside the cone to cover the feed hole 30. The drive motor 34 is coaxially mounted on the top of the feeder 3. The lower end of the connecting shaft 33 is connected to the center of the sealing plate 32, and the upper end of the connecting shaft 33 is connected to the power output end of the drive motor 34. The feed inlet 35 and the air source inlet 36 are connected to the upper part of the feeder 3. The sealing plate 32 can cover the feed hole 30 when feeding. After high-pressure airflow is introduced through the air source inlet 36, the sealing plate 32 is opened, allowing the liquid to be quickly squeezed out from the feed hole 30 and mixed by the stirring device 2.

[0024] See Figure 1-6The stirring device 2 includes a stirring motor 21, a turntable 22, and a stirring rod 23. The stirring motor 21 is evenly spaced around the axis of the mixing cylinder 1 and installed on the side wall of the mixing cylinder 1. The power output end of the stirring motor 21 is horizontally positioned inside the mixing cylinder 1 and faces the center of the mixing cylinder 1. The center of the turntable 22 is connected to the power output end of the stirring motor 21. The stirring rod 23 is a round rod with one end fixed to the turntable 22. The stirring rod 23 is evenly spaced in a circle on the turntable 22, and it mixes the mixture by stirring similarly to the action of an egg beater. At the same time, the turntable 22 is also equipped with an extended stirring rod to reduce the number of dead corners in the mixing process.

[0025] Work process:

[0026] Work process

[0027] Bacterial liquid injection: The concentrated bacterial liquid is fed into the feeding port 35 of the distributor 3 into the feeding cylinder 31 and dispersed into the mixing cylinder 1 through the feeding hole 30. The stirring motor 21 of the stirring device 2 is started, which drives the turntable 22 to rotate at a low speed. The round rod stirring rod 23 gently disturbs the bacterial liquid to eliminate the initial sedimentation and form the basic flow field.

[0028] Feeding stage: Switch the feed port 35 to the trehalose syrup pipeline and inject trehalose solution into the feeding cylinder 31. At this time, the sealing plate 32 remains closed, and sterile compressed air is introduced through the air source port 36 to make the slurry evenly accumulate in the lower part of the conical feeding cylinder 31. The drive motor 34 starts and controls the sealing plate 32 to rotate so that the feeding hole 30 opens. Under the drive of air pressure, the trehalose syrup is sprayed through the feeding hole 30 into the stirring device 2 in the mixing cylinder 1. The stirring motor 21 increases the speed, and the stirring rod 23 forms a radial vortex to quickly carry the trehalose to the deep layer of the bacterial solution to avoid sugar distribution deviation.

[0029] The skim milk is then pre-dissolved into a 40% concentration solution. After the micelles are broken up by a homogenizer, the solution is pumped into the feeding cylinder 31 through the feed port 35. Sterile compressed air is introduced through the air source port 36 according to the above feeding method, so that the skim milk solution is sprayed through the feeding hole 30 into the stirring device 2 in the mixing cylinder 1 and stirred.

[0030] Then, glycerin is injected through the feed port 35, and sterile compressed air is introduced through the air source port 36 according to the above feeding method, so that the glycerin is sprayed through the cloth hole 30 into the stirring device 2 in the mixing cylinder 1 and stirred.

[0031] Final mixing and homogenization: The stirring motor 21 ensures that all components are mixed evenly and wet the surface of the bacterial cells by extending the mixing time.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mixing device for a freeze-dried probiotic production line, characterized in that: The device includes a mixing cylinder (1), a stirring device (2), and a feeder (3). The mixing cylinder (1) has a top cover (11) and a discharge port (12) at the bottom. The stirring device (2) is installed horizontally around the axis of the mixing cylinder (1) at even intervals inside the mixing cylinder (1). The feeder (3) is coaxially installed with the top cover (11) of the mixing cylinder (1). The feeder (3) has several sets of feed holes (30) at the bottom that correspond to the direction of the stirring device (2) inside the mixing cylinder (1).

2. The mixing device for the freeze-dried probiotic production line according to claim 1, characterized in that: The feeder (3) includes a feed cylinder (31), a sealing plate (32), a connecting shaft (33), a drive motor (34), a feed port (35), and an air source port (36). The feed cylinder (31) is coaxially installed with the top cover (11). The lower part of the feeder (3) is a cone extending into the mixing cylinder (1). The feed hole (30) is opened on the cone wall at the lower part of the feeder (3). The sealing plate (32) is rotatably installed inside the cone to cover the feed hole (30). The drive motor (34) is coaxially installed at the top of the feeder (3). The lower end of the connecting shaft (33) is connected to the center of the sealing plate (32). The upper end of the connecting shaft (33) is connected to the power output end of the drive motor (34). The feed port (35) and the air source port (36) are connected to the upper part of the feeder (3).

3. The mixing device for the freeze-dried probiotic production line according to claim 1, characterized in that: The stirring device (2) includes a stirring motor (21), a turntable (22) and a stirring rod (23). The stirring motor (21) is installed around the axis of the mixing cylinder (1) at even intervals with the side wall of the mixing cylinder (1). The power output end of the stirring motor (21) is arranged horizontally inside the mixing cylinder (1) facing the center of the mixing cylinder (1). The center of the turntable (22) is connected to the power output end of the stirring motor (21). The stirring rod (23) is a round rod and one end is fixed to the turntable (22). The stirring rod (23) is installed in a circle at even intervals on the turntable (22).

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