Multiple efficient sealing storage tank for lactic acid bacteria beverage

Abstract

The invention discloses a multiple efficient sealing storage tank for lactic acid bacteria beverages, and relates to the technical field of beverage storage. The device comprises a tank body, a lower defoaming assembly is arranged in the tank body, a liquid inlet pipe and a bubble discharging pipe are arranged at the top of the tank body, and a liquid discharging pipe is arranged at the bottom of the tank body; and the lower defoaming assembly comprises a piston plate capable of ascending and descending in the tank body, a storage cavity is formed in the piston plate, a sealing sleeve is inserted into the storage cavity in a sealed mode, and a plurality of elastic bone strips are annularly arranged in the sealing sleeve. Through the arrangement of the sealing sleeve, primary sealing is formed between the piston plate and the tank body, multiple efficient sealing is achieved in cooperation with the sealing performance of the tank body, along with use of the lactic acid bacteria beverage, the piston plate can synchronously descend along with the beverage, a cavity is prevented from being formed above the beverage, volatilization of part of components in the volatile beverage is reduced, and the service life of the beverage is prolonged. The influence on the flavor, taste and quality of the beverage is reduced, and the storage quality is high.

Description

Technical Field

[0001] This invention relates to the field of beverage storage technology, and more specifically to a multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages. Background Technology

[0002] Lactic acid bacteria beverages, as a type of drink with health benefits, have been widely promoted and consumed globally in recent years. Rich in probiotics, they help regulate the gut microbiota, promote digestion, and enhance immunity, making them an indispensable part of people's daily health routines. With increasing consumer demand, the production scale of lactic acid bacteria beverages has gradually expanded, making their storage particularly important.

[0003] A utility model patent (publication number: CN211077069U) discloses a beverage storage tank that can be heated or cooled, comprising: a cup, a lid, a beverage container, a solvent cup, a conical lid, and a bottom lid. This patent, like existing storage tanks, simply stores beverages. However, since lactic acid bacteria beverages are prone to foaming during production, transfer, and storage, if the storage tank design does not consider foam accumulation, it will affect the effective space of the storage tank, thus impacting storage capacity and product quality. Furthermore, large storage tanks typically require a significant amount of space, especially in large-scale production enterprises. In the actual production process of lactic acid bacteria beverages, the consumption rate of the beverage within the storage tank varies. If the consumption rate is slow, a large portion of the storage tank's space will remain unused for extended periods, wasting valuable storage space. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages in order to solve the above problems.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: A multi-layer high-efficiency sealed storage tank for lactic acid bacteria beverages includes a tank body, an internal foam-removing component, an inlet pipe and a foam-removing pipe at the top of the tank body, and a drain pipe at the bottom of the tank body. The defoaming assembly includes a piston plate that can move up and down inside the tank. The piston plate has a storage cavity inside, and a sealing sleeve is sealed inside the storage cavity. The sealing sleeve is telescopic, and several elastic ribs are arranged in a ring inside the sealing sleeve. When the sealing sleeve extends out of the storage cavity, the elastic ribs will bend upward under their own elastic force. An electromagnet is provided on the inner side of the bottom of the elastic ribs. A defoaming hole is opened through the piston plate. The defoaming hole is connected to a defoaming pipe through a telescopic tube. The defoaming pipe is connected to an external negative pressure device.

[0006] Furthermore, a lifting screw is rotatably installed inside the tank, and a drive source is fixedly installed at the bottom of the tank. The drive source consists of a motor and a reducer. The lifting screw is fixedly connected to the output end of the reducer. A guide post is fixedly installed inside the tank. A transmission hole is opened through the center of the piston plate. The transmission hole is connected to the lifting screw with a sealing thread. A guide hole is opened through the inside of the piston plate. The guide hole is eccentrically set. The guide post slides in a sealed manner with the guide hole. The upper half of the guide post is hollow and connected to the liquid inlet pipe. At the same time, a liquid inlet hole is opened on the outer side of the upper half of the guide post.

[0007] Furthermore, the inner top of the storage cavity is provided with several straight grooves in an annular shape. A drive disk is rotatably installed inside the storage cavity. The drive disk is provided with several arc-shaped guide grooves in an annular shape. A sliding column is provided at the top of the elastic rib. The sliding column passes through the arc-shaped guide groove and is slidably connected in the straight groove. A nut gear is rotatably installed inside the transmission hole. The nut gear is threadedly connected to the lifting screw. A drive wheel is rotatably installed inside the storage cavity. The inner wall of the drive disk is provided with inner gear teeth. The drive wheel meshes with the inner gear teeth. A lifting transmission wheel is provided inside the storage cavity. The transmission wheel meshes between the drive wheel and the nut gear. The thickness of the drive wheel and the transmission wheel is one-third of the thickness of the nut gear. A locking tooth block is fixedly installed at the inner bottom of the storage cavity. The locking tooth block is located directly below the drive wheel.

[0008] Furthermore, a transmission slide shaft is rotatably installed inside the storage cavity, and a guide protrusion is provided on the outer side of the transmission slide shaft. The transmission wheel slides on the transmission slide shaft. An electromagnet is fixedly installed at the bottom of the storage cavity, and a top spring is fixedly installed on the top of the electromagnet, pressing against the bottom of the transmission wheel.

[0009] Furthermore, the nut gear has sealing grooves at both the top and bottom, and a sealing ring is squeezed and installed inside the sealing groove, which is then fitted onto the lifting screw.

[0010] Furthermore, an upward-bubbling assembly is fixedly installed on the inner top of the tank. The upward-bubbling assembly has the same structure as the downward-bubbling assembly, and the liquid inlet is located below the upward-bubbling assembly.

[0011] Furthermore, a connector is provided at the top of the telescopic tube, and a three-way solenoid valve is provided at the bottom of the bubble-discharging tube. The connectors on both the bubble-up assembly and the bubble-down assembly are connected to the three-way solenoid valve.

[0012] Furthermore, the bottom end of the sealing sleeve is provided with a slanted scraping groove.

[0013] Furthermore, a seal is fitted on the outer side of the top of the piston plate, and the top of the seal is designed to be inclined inward.

[0014] The beneficial effects of this invention are as follows: This invention, through the design of a defoaming component, allows the sealing sleeve to extend and adhere tightly to the inner wall of the can during the filling of lactic acid bacteria beverages. A foam space is formed in the middle of the sealing sleeve, where the foam generated during the filling of lactic acid bacteria beverages is located. Subsequently, when the electromagnet is de-energized, the elastic ribs bend upward under the action of their elasticity, causing the sealing sleeve to close inwards while simultaneously extending. This drives the foam to the center, where it is then sucked out by negative pressure through the telescopic tube and the defoaming tube. After the foam is sucked out, the lactic acid bacteria beverage is slowly poured in until the can is full, thus achieving efficient and high-quality storage of lactic acid bacteria beverages.

[0015] This invention achieves a preliminary seal between the piston plate and the can by setting a sealing sleeve. Combined with the sealing properties of the can itself, it realizes multiple efficient seals. Furthermore, as the lactic acid bacteria beverage is used, the piston plate can descend synchronously with the beverage, preventing the formation of a cavity above the beverage, reducing the volatilization of some components in the beverage, minimizing the impact on the flavor, taste, and quality of the beverage, and ensuring high storage quality.

[0016] This invention, through the setting of a liftable defoaming component, can divide the tank, making full use of the empty space in the large tank, resulting in high space utilization. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the storage tank of the present invention; Figure 2 This is a schematic diagram of the internal structure of the storage tank of the present invention; Figure 3 This is a schematic diagram of the bubble removal component structure of the present invention; Figure 4 This is a cross-sectional view of the defoaming component of the present invention; Figure 5 This is a schematic cross-sectional view of the piston plate structure of the present invention; Figure 6 This is a schematic diagram of the drive disk structure of the present invention; Figure 7 This is a schematic diagram of the sealing sleeve structure of the present invention.

[0018] Reference numerals: 1. Tank body; 2. Upper foaming assembly; 3. Lower foaming assembly; 31. Piston plate; 32. Seal; 33. Receiving cavity; 34. Linear slide groove; 35. Transmission hole; 351. Nut gear; 352. Drive wheel; 353. Transmission shaft; 354. Electromagnet; 355. Transmission wheel; 356. Top spring; 357. Locking tooth block; 36. Guide hole; 37. Telescopic tube; 371. Connector; 38. Drive disc; 381. Arc-shaped guide groove; 382. Inner gear tooth; 39. Sealing sleeve; 391. Elastic rib; 392. Sliding column; 393. Adsorption electromagnet; 394. Angled scraper; 4. Drive source; 5. Lifting screw; 6. Guide column; 7. Inlet pipe; 8. Drain pipe; 9. Foam removal pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example 1, as Figures 1-7 As shown, a multi-layer high-efficiency sealed storage tank for lactic acid bacteria beverages includes a tank body 1, an internal foaming component 3, an inlet pipe 7 and a foaming pipe 9 at the top of the tank body 1, and a drain pipe 8 at the bottom of the tank body 1. The foaming assembly 3 includes a piston plate 31 that can move up and down inside the tank 1. The piston plate 31 has a receiving cavity 33 inside. A sealing sleeve 39 is sealed inside the receiving cavity 33. The sealing sleeve 39 is telescopic. Several elastic ribs 391 are arranged in a ring inside the sealing sleeve 39. When the sealing sleeve 39 extends out of the receiving cavity 33, the elastic ribs 391 will bend upward under their own elastic force. An electromagnet 393 is provided on the inner side of the bottom of the elastic ribs 391. A foam discharge hole is opened through the piston plate 31. The foam discharge hole is connected to the foam discharge pipe 9 through the telescopic tube 37. The foam discharge pipe 9 is connected to an external negative pressure device.

[0021] Filling: First, the electromagnet 393 is energized to generate magnetic force, causing the lower end of the elastic rib 391 to adhere to the inner wall of the tank 1. The sealing sleeve 39 is tightly attached to the inner wall of the tank 1. Then, the piston plate 31 is raised, and the sealing sleeve 39 extends relative to the piston plate 31, forming a foam space between the sealing sleeves 39. The piston plate 31 stops rising after reaching the top, and part of the sealing sleeve 39 is still located in the receiving cavity 33. The lactic acid bacteria beverage is poured into the tank 1 through the liquid inlet pipe 7, which is located below the foaming component 3. At this time, the lactic acid bacteria beverage can be filled quickly until the liquid level is just submerged at the bottom of the sealing sleeve 39. Quantitative filling is possible, or a capacitive sensor can be installed at the bottom of one of the elastic ribs 391. The capacitive sensor penetrates the sealing sleeve 39 and can very accurately detect changes in liquid level. When the liquid comes into contact with the sensor, the signal change triggers a stop in filling. At this time, the foam is located in the foam cavity. Then, the electromagnet 393 is de-energized, and the elastic strip 391 bends upward under its own elastic force. The elastic strip 391 causes the sealing sleeve 39 to close inward. At the same time, the sealing sleeve 39 extends, so that the bottom end of the sealing sleeve 39 can close inward along the liquid surface, gathering the foam in the middle. At the same time, the external negative pressure equipment is activated, and the degassing pipe 9 generates negative pressure. The degassing pipe 9 causes the telescopic pipe 37 to generate negative pressure. The foam is extracted through the telescopic pipe 37 and the degassing pipe 9, eliminating the problem of foam accumulation. The extracted foam is collected and reused. Then, the sealing sleeve 39 is retracted into the receiving cavity 33 until the electromagnet 393 moves to the outlet position of the receiving cavity 33. Due to the protrusion inside the electromagnet 393, it plays a limiting role. The elastic bone strip 391 is completely received into the receiving cavity 33. The exposed part of the sealing sleeve 39 is pressed against the inner wall of the can 1 by the electromagnet 393. Finally, the lactic acid bacteria beverage is slowly poured into the can 1 until it is full. The sealing sleeve 39 forms a preliminary seal between the piston plate 31 and the can 1. Combined with the sealing performance of the can 1 itself, multiple efficient seals are achieved, resulting in a good sealing effect.

[0022] As the lactic acid bacteria beverage is consumed, the defoaming component 3 descends synchronously, and the adsorption electromagnet 393 is energized. The exposed portion of the sealing sleeve 39 tightly adheres to the inner wall of the tank 1. At this time, the downward thrust of the piston plate 31 is greater than the adsorption force of the adsorption electromagnet 393. As the defoaming component 3 descends, the exposed portion of the sealing sleeve 39 scrapes the inner wall of the tank 1, cleaning it and preventing excessive space above the lactic acid bacteria beverage. In cases of large cavities, contact between the liquid surface and air may lead to the loss or concentration of some volatile components, affecting the flavor, taste, and quality of the beverage. Therefore, the quality of the lactic acid bacteria beverage remains stable during use. Furthermore, the close-fitting scraping action of the defoaming component 3 eliminates the most difficult cleaning step. The space above it can be sterilized and dried before storing new lactic acid bacteria beverages, making full use of the internal space of the tank 1, resulting in high space utilization for large storage tanks.

[0023] Example 2, based on the above examples, further includes: a lifting screw 5 rotatably mounted inside the tank body 1; a drive source 4 fixedly mounted at the bottom of the tank body 1, the drive source 4 consisting of a motor and a reducer; the lifting screw 5 fixedly connected to the output end of the reducer; a guide post 6 fixedly mounted inside the tank body 1; a transmission hole 35 penetrating through the center of the piston plate 31, the transmission hole 35 being threadedly connected to the lifting screw 5; a guide hole 36 penetrating through the inside of the piston plate 31, the guide hole 36 being eccentrically positioned; the guide post 6 and the guide hole 36 sliding in a sealed manner; the upper half of the guide post 6 being hollow and connected to the liquid inlet pipe 7; and a liquid inlet hole being opened on the outer side of the upper half of the guide post 6.

[0024] By controlling the motor to be powered on, the motor drives the lifting screw 5 to rotate through the reducer. The piston plate 31 cannot rotate under the restriction of the guide post 6. Therefore, the lifting screw 5 drives the piston plate 31 to rise and fall through the transmission hole 35. During filling, the piston plate 31 rises above the liquid inlet hole, and the lactic acid bacteria beverage enters the tank 1 through the liquid inlet pipe 7 and the liquid inlet hole.

[0025] Example 3, based on the above examples, further includes: a plurality of straight sliding grooves 34 annularly formed at the top of the storage cavity 33; a drive disk 38 rotatably mounted inside the storage cavity 33; a plurality of arc-shaped guide grooves 381 annularly formed inside the drive disk 38; a sliding column 392 provided at the top of the elastic rib 391; the sliding column 392 passing through the arc-shaped guide grooves 381 and slidably connected in the straight sliding grooves 34; a nut gear 351 rotatably mounted inside the transmission hole 35; the nut gear 351 being threadedly connected to the lifting screw 5; and the storage cavity... The drive wheel 352 is rotatably mounted inside the storage cavity 33. The inner wall of the drive disc 38 is provided with inner gear teeth 382. The drive wheel 352 meshes with the inner gear teeth 382. The storage cavity 33 is provided with a transmission wheel 355 that can be raised and lowered. The transmission wheel 355 meshes between the drive wheel 352 and the nut gear 351. The thickness of the drive wheel 352 and the transmission wheel 355 is one-third of the thickness of the nut gear 351. A locking tooth block 357 is fixedly installed at the bottom of the storage cavity 33. The locking tooth block 357 is located directly below the drive wheel 352.

[0026] The storage cavity 33 is rotatably mounted with a transmission slide shaft 353. A guide protrusion is provided on the outer side of the transmission slide shaft 353. The transmission wheel 355 slides on the transmission slide shaft 353. An electromagnet 354 is fixedly mounted on the bottom of the storage cavity 33. A top spring 356 is fixedly mounted on the top of the electromagnet 354. The top spring 356 presses against the bottom of the transmission wheel 355.

[0027] Foam cavity formation: At this time, the electromagnet 354 is energized, and the electromagnet 354 descends to the bottom through magnetic attraction of the transmission wheel 355. The transmission wheel 355 is engaged between the locking tooth block 357 and the nut gear 351. The nut gear 351 cannot rotate, and the drive wheel 352 is unrestricted and can rotate. At this time, the lifting screw 5 is controlled to rotate. The lifting screw 5 drives the piston plate 31 to rise through the nut gear 351. Since the sealing sleeve 39 is attracted to the inner wall of the tank 1 by the attracting electromagnet 393, the sealing sleeve 39 is subjected to a downward tensile force. The sealing sleeve 39 drives the drive disc 38 to rotate through the sliding column 392 and the arc-shaped guide groove 381. The drive disc 38 drives the drive wheel 352 to rotate. Therefore, as the piston plate 31 rises, the sealing sleeve 39 can automatically form a foam cavity.

[0028] Foam aggregation: When electromagnets 393 and 354 are de-energized, the top spring 356 pushes the transmission wheel 355 upward. The transmission wheel 355 meshes between the drive wheel 352 and the nut gear 351. At this time, the lifting screw 5 is controlled to rotate, which drives the nut gear 351 to rotate. The nut gear 351 drives the transmission wheel 355 to rotate, which in turn drives the drive wheel 352 to rotate. The drive wheel 352 drives the drive disc 38 to rotate through the inner gear teeth 382. The drive disc 38 drives the sliding column 392 to slide outward along the straight sliding groove 34 through the arc-shaped guide groove 381. The sliding column 392 drives the sealing sleeve 39 to extend through the elastic rib 391. The elastic rib 391 bends upward under its own elastic force, causing the sealing sleeve 39 to close inward. At the same time, the sealing sleeve 39 extends, allowing its bottom end to close inward along the liquid surface, thus gathering the foam in the middle. When the lifting screw 5 is controlled to rotate, it can accommodate the sealing sleeve 39.

[0029] Example 4, based on the above examples, further includes a sealing groove on the top and bottom of the nut gear 351, with a sealing ring squeezed and installed inside the sealing groove, and the sealing ring being sleeved on the lifting screw 5.

[0030] The sealing ring ensures that the nut gear 351 and the lifting screw 5 maintain a tight seal during transmission.

[0031] Example 5, based on the above examples, further includes an upper foaming component 2 fixedly installed on the inner top of the tank body 1. The upper foaming component 2 has the same structure as the lower foaming component 3, and the liquid inlet is located below the upper foaming component 2.

[0032] The top of the telescopic tube 37 is provided with a connector 371, and the bottom of the bubble discharge tube 9 is provided with a three-way solenoid valve. The connectors 371 on the upper bubble assembly 2 and the lower bubble assembly 3 are both connected to the three-way solenoid valve.

[0033] By setting up the foam removal component 2, the foam removal component 2 can remove the foam on top of the lactic acid bacteria beverage during the secondary filling process.

[0034] Example 6, based on the above examples, further includes a slanted scraping opening 394 at the bottom of the sealing sleeve 39. The slanted scraping opening 394 allows the sealing sleeve 39 to better clean the inner wall of the tank 1, resulting in a better cleaning effect.

[0035] A sealing element 32 is fitted on the outer side of the top of the piston plate 31. The top of the sealing element 32 is designed to be inclined inward. This design improves the sealing performance and also allows the inner wall of the tank 1 to be scraped when the piston plate 31 rises.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages, comprising a tank body (1), characterized in that, The tank (1) is equipped with a defoaming component (3), the top of the tank (1) is equipped with an inlet pipe (7) and a defoaming pipe (9), and the bottom of the tank (1) is equipped with a drain pipe (8). The defoaming component (3) includes a piston plate (31) that can move up and down inside the tank (1). The piston plate (31) has a storage cavity (33) inside. A sealing sleeve (39) is sealed inside the storage cavity (33). The sealing sleeve (39) can extend and retract. Several elastic ribs (391) are arranged in a ring inside the sealing sleeve (39). When the sealing sleeve (39) extends out of the storage cavity (33), the elastic ribs (391) will bend upward under their own elastic force. An adsorption electromagnet (393) is provided on the inner side of the bottom of the elastic ribs (391). A defoaming hole is opened through the piston plate (31). The defoaming hole is connected to the defoaming pipe (9) through the telescopic tube (37). The defoaming pipe (9) is connected to the external negative pressure equipment.

2. The storage tank for lactic acid bacteria beverages with multiple high-efficiency sealing as described in claim 1, characterized in that, The tank body (1) is rotatably installed with a lifting screw (5). The bottom of the tank body (1) is fixedly installed with a drive source (4). The drive source (4) consists of a motor and a reducer. The lifting screw (5) is fixedly connected to the output end of the reducer. The tank body (1) is fixedly installed with a guide column (6). The center of the piston plate (31) is provided with a transmission hole (35). The transmission hole (35) is sealed and threadedly connected to the lifting screw (5). The piston plate (31) is provided with a guide hole (36). The guide hole (36) is eccentrically set. The guide column (6) and the guide hole (36) slide in a sealed manner. The upper half of the guide column (6) is hollow and connected to the liquid inlet pipe (7). At the same time, the outer side of the upper half of the guide column (6) is provided with a liquid inlet hole.

3. The storage tank for lactic acid bacteria beverages with multiple high-efficiency sealing as described in claim 2, characterized in that, The inner top of the storage cavity (33) is provided with several straight grooves (34). A drive disk (38) is rotatably installed inside the storage cavity (33). The drive disk (38) is provided with several arc-shaped guide grooves (381) inside. A sliding column (392) is provided on the top of the elastic rib (391). The sliding column (392) passes through the arc-shaped guide groove (381) and is slidably connected in the straight groove (34). A nut gear (351) is rotatably installed inside the transmission hole (35). The nut gear (351) is threadedly connected to the lifting screw (5). The storage cavity (33) is rotatably installed inside the drive hole (35). There is a drive wheel (352), and the inner wall of the drive disc (38) is provided with inner gear teeth (382). The drive wheel (352) meshes with the inner gear teeth (382). The storage cavity (33) is provided with a transmission wheel (355) that can be raised and lowered. The transmission wheel (355) meshes between the drive wheel (352) and the nut gear (351). The thickness of the drive wheel (352) and the transmission wheel (355) is one-third of the thickness of the nut gear (351). A locking tooth block (357) is fixedly installed at the bottom of the storage cavity (33). The locking tooth block (357) is located directly below the drive wheel (352).

4. The multi-layer high-efficiency sealed storage tank for lactic acid bacteria beverages according to claim 3, characterized in that, The storage cavity (33) is rotatably mounted with a transmission slide shaft (353). A guide protrusion is provided on the outside of the transmission slide shaft (353). The transmission wheel (355) slides on the transmission slide shaft (353). An electromagnet (354) is fixedly mounted on the bottom of the storage cavity (33). A top spring (356) is fixedly mounted on the top of the electromagnet (354). The top spring (356) presses against the bottom of the transmission wheel (355).

5. A multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages according to claim 4, characterized in that, The nut gear (351) has sealing grooves at both the top and bottom. A sealing ring is installed inside the sealing groove and is fitted onto the lifting screw (5).

6. A multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages according to claim 5, characterized in that, The inner top of the tank (1) is fixedly installed with an up-bubbling assembly (2). The up-bubbling assembly (2) has the same structure as the down-bubbling assembly (3). The liquid inlet is located below the up-bubbling assembly (2).

7. A multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages according to claim 6, characterized in that, The top of the telescopic tube (37) is provided with a connector (371), and the bottom of the bubble draining tube (9) is provided with a three-way solenoid valve. The connectors (371) on the bubble draining assembly (2) and the bubble draining assembly (3) are both connected to the three-way solenoid valve.

8. A multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages according to claim 1, characterized in that, The bottom end of the sealing sleeve (39) is provided with a slanted scraper (394).

9. A multi-layered, high-efficiency sealed storage tank for lactic acid bacteria beverages according to claim 1, characterized in that, A seal (32) is fitted on the outer side of the top of the piston plate (31), and the top of the seal (32) is designed to be inclined inward.

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