Dairy product fermentation tank with cleaning structure

Abstract

The utility model discloses a dairy product fermentation tank with a cleaning structure, which comprises a fermentation tank body and a sealing cover fixedly mounted at the top of the fermentation tank body, wherein a feeding hole is formed in the top of the sealing cover, and a feeding pipe communicated with the feeding hole is fixedly mounted at the top of the sealing cover; and a cleaning mechanism is arranged at the top of the sealing cover. The cleaning efficiency and the automation level of the fermentation tank are remarkably improved through the innovative cleaning mechanism design, the cleaning box reciprocates and ascends and descends along with the lifting sliding pipe, meanwhile, the driving mechanism drives the cleaning brush to synchronously rotate, the composite cleaning action of spraying washing and mechanical brushing is formed, the whole area such as the top, the side wall and the bottom of the tank body is effectively covered, and the cleaning efficiency is improved. The cleaning blind area of traditional fixed spraying is avoided, the removal effect on stubborn milk dirt and protein residues is remarkably enhanced, the manual intervention frequency is greatly reduced, the risk that workers make contact with pollution is reduced, and the requirement of large-scale production for efficient cleaning is met.

Description

Technical Field

[0001] The utility model relates to the technical field of food processing equipment, in particular to a dairy product fermentation tank with a cleaning structure. Background Art

[0002] Dairy fermentation tanks are critical equipment in the production of dairy products like yogurt and cheese. Their internal cleanliness directly impacts product safety and flavor stability. During the fermentation process, active substances like milk fat and protein adhere to the tank's interior, forming a difficult-to-remove biofilm. Food safety regulations require thorough cleaning of the tanks after each fermentation batch to prevent residual bacteria from growing and contaminating subsequent products.

[0003] Currently, the industry generally adopts manual scrubbing combined with fixed spraying to clean fermentation tanks. However, the tank body is deep and the inner wall surface is complex, making it difficult for operators to thoroughly clean the bottom of the tank and the junction area of the side wall. The fixed spray head is limited by the installation position, and there are cleaning dead corners, resulting in biofilm residue. Manual scrubbing requires frequent opening and closing of the tank cover, which is not only slow and laborious, but also more likely to introduce external contamination sources. Especially for high-viscosity dairy fermentation tanks, the existing cleaning method cannot balance the contradiction between cleaning efficiency and operational safety. Therefore, we proposed a dairy fermentation tank with a cleaning structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology and to propose a dairy product fermentation tank with a cleaning structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A dairy fermentation tank with a cleaning structure, comprising a fermentation tank body and a sealing cover fixedly installed on the top of the fermentation tank body:

[0007] A feed hole is provided on the top of the sealing cover, and a feed pipe connected to the feed hole is fixedly installed;

[0008] A cleaning mechanism is provided on the top of the sealing cover;

[0009] The cleaning mechanism comprises:

[0010] A cylinder fixedly mounted on top of the sealing cover;

[0011] A lifting plate fixedly connected to the end of the cylinder piston rod;

[0012] A plurality of sliding holes are provided on the top of the sealing cover;

[0013] Rotating a plurality of lifting slide tubes connected to the bottom of the lifting plate, wherein the lifting slide tubes are slidably engaged with the inner wall of the sliding hole;

[0014] A cleaning box is fixedly mounted on the end of the lifting slide tube, wherein the side wall of the cleaning box is provided with a plurality of liquid outlet holes distributed in a circular array, and a plurality of cleaning brushes are fixedly mounted on the outer wall thereof to contact the inner wall of the fermentation tank;

[0015] A liquid storage tank fixedly mounted on the top of the sealing cover;

[0016] A connecting pipe connecting the liquid storage tank and the lifting slide pipe.

[0017] Preferably, the plurality of sliding holes are distributed in a circular array with the intersection of the central axis of the sealing cover and the top surface as the center of the circle.

[0018] Preferably, a discharge hole is provided at the bottom of the fermentation tank body, and a discharge pipe connected to the discharge hole is fixedly installed, and a control valve is provided on the discharge pipe.

[0019] Preferably, a sealing mechanism is provided at the bottom of the cleaning box, comprising:

[0020] A sealing circular plate fixedly mounted on the bottom of the cleaning box;

[0021] A sealing circular groove is provided on the inner wall of the sliding hole;

[0022] Wherein, the outer side wall of the sealing circular plate is slidably connected to the inner side wall of the sealing circular groove.

[0023] Preferably, the inner wall of the fermentation tank, the sealing cover and the sealing circular plate are all made of food-grade stainless steel.

[0024] Preferably, an annular groove is formed on the side wall of the sealing circular plate, a food-grade nitrile rubber O-ring is embedded in the annular groove, and the sealing circular plate is interference-sealed with the inner side wall of the sealing circular groove via the O-ring.

[0025] Preferably, a driving mechanism is provided at the bottom of the lifting plate, comprising:

[0026] A plurality of support plates fixedly mounted on the bottom of the lifting plate;

[0027] A first rotating shaft and a second rotating shaft rotatably connected to the support plate;

[0028] Chain discs are sleeved on the outer sides of the first rotating shaft and the second rotating shaft, and chains are engaged with the chain discs;

[0029] The bevel gears are fixedly sleeved on the first rotating shaft and the outer side of the lifting slide tube, and two adjacent bevel gears are meshed with each other;

[0030] A plurality of racks fixedly mounted on the top of the sealing cover;

[0031] A spur gear is fixedly sleeved on the outer side of the second rotating shaft and meshes with the adjacent rack.

[0032] Preferably, a plurality of through holes for the racks to pass through are provided on the top of the lifting plate.

[0033] Preferably, a protective cover is provided on the outside of the bevel gear, and the protective cover is fixedly installed on the outside of the support plate.

[0034] The beneficial effects of the utility model are:

[0035] Through the innovative cleaning mechanism design, the cleaning efficiency and automation level of the fermentation tank are significantly improved. While the cleaning box moves back and forth with the lifting slide, the driving mechanism drives the cleaning brush to rotate synchronously, forming a "spray flushing + mechanical brushing" compound cleaning action, effectively covering the entire area of the tank top, side walls and bottom, avoiding the cleaning blind spots of traditional fixed spraying, and significantly enhancing the removal effect of stubborn milk stains and protein residues, greatly reducing the frequency of manual intervention, reducing the risk of human contact contamination, and meeting the needs of large-scale production for efficient cleaning.

[0036] The optimized design of the sealing mechanism and driving structure takes into account both sealing and energy saving. The dynamic sealing structure at the bottom of the cleaning box effectively blocks liquid leakage and external pollution during the lifting process, ensuring a sterile environment in the tank; the driving mechanism uses the linear motion of the cylinder to convert it into rotational power for the brush, without the need for additional power sources such as motors, reducing equipment energy consumption and maintenance costs. At the same time, the protective design of the transmission components reduces the corrosion of the cleaning liquid on the mechanical structure, extends the service life of the equipment, provides stable and reliable cleanliness protection for dairy product production, and adapts to the modern food industry's demand for energy-saving and safe technology upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a dairy fermentation tank with a cleaning structure proposed by the present invention;

[0038] Figure 2 for Figure 1 A magnified view of the structure at center A;

[0039] Figure 3 for Figure 1 A magnified view of the structure at point B in the middle;

[0040] Figure 4 This is a schematic structural diagram of the bottom of a sealing cover in a dairy fermentation tank with a cleaning structure proposed by the present invention;

[0041] Figure 5 This is a bottom-sectional view of a lifting plate in a dairy fermentation tank with a cleaning structure proposed by the present invention.

[0042] In the figure: 1. Fermentation tank body; 2. Sealing cover; 3. Feed hole; 4. Feed pipe; 5. Cylinder; 6. Lifting plate; 7. Slide hole; 8. Lifting slide pipe; 9. Cleaning box; 10. Liquid outlet; 11. Cleaning brush; 12. Liquid storage tank; 13. Connecting pipe; 14. Discharge pipe; 15. Control valve; 16. Sealing circular plate; 17. Sealing circular groove; 18. Support plate; 19. First rotating shaft; 20. Second rotating shaft; 21. Chain; 22. Rack; 23. Spur gear; 24. Through hole; 25. Protective cover. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] Reference Figure 1-5 A dairy fermentation tank with a cleaning structure includes a fermentation tank body 1 and a sealing cover 2 fixedly installed on the top of the fermentation tank body 1:

[0045] A feed hole 3 is formed on the top of the sealing cover 2, and a feed pipe 4 connected to the feed hole 3 is fixedly installed;

[0046] A cleaning mechanism is provided on the top of the sealing cover 2;

[0047] The cleaning mechanism includes:

[0048] A cylinder 5 is fixedly mounted on the top of the sealing cover 2;

[0049] A lifting plate 6 is fixedly connected to the end of the piston rod of the cylinder 5;

[0050] A plurality of sliding holes 7 are provided on the top of the sealing cover 2;

[0051] The plurality of lifting slides 8 connected to the bottom of the lifting plate 6 are rotated so that the lifting slides 8 slide in cooperation with the inner wall of the sliding hole 7;

[0052] A cleaning box 9 is fixedly mounted on the end of the lifting slide 8. The side wall of the cleaning box 9 is provided with a plurality of liquid outlet holes 10 distributed in a circular array. A plurality of cleaning brushes 11 are fixedly mounted on the outer wall thereof so as to contact the inner wall of the fermentation tank body 1.

[0053] A liquid storage tank 12 fixedly mounted on the top of the sealing cover 2;

[0054] A connecting pipe 13 connects the liquid storage tank 12 and the lifting slide pipe 8.

[0055] Further explanation: the lifting plate 6 is driven up and down by the cylinder 5, driving the cleaning box 9 to move back and forth along the slide hole 7, thereby realizing automatic cleaning of the inner wall of the fermentation tank body 1, avoiding the tediousness and contamination risk of manual opening and cleaning;

[0056] The annular liquid outlet 10 on the side wall of the cleaning box 9 cooperates with the cleaning brush 11 to spray the cleaning liquid evenly onto the tank wall. At the same time, the brush removes stubborn milk stains through contact and friction, improving cleaning efficiency and cleanliness.

[0057] The liquid storage tank 12 is connected to the lifting slide pipe 8 through the connecting pipe 13 to form a closed cleaning liquid circulation path, thereby ensuring a continuous supply of cleaning liquid and reducing the need for mid-flow liquid replenishment operations.

[0058] like Figure 4 As shown, the plurality of sliding holes 7 are distributed in a circular array with the intersection of the central axis and the top surface of the sealing cover 2 as the center of the circle.

[0059] Further explanation: the sliding holes 7 are distributed in a ring shape with the central axis of the sealing cover 2 as the center, so that the multiple lifting slide tubes 8 are evenly distributed around the circumference, driving the cleaning box 9 to form 360° coverage on the inner wall of the tank without dead angles, avoiding the blind spot problem of traditional single-point cleaning;

[0060] The annular layout cooperates with the synchronous lifting of the cylinder 5 to ensure that the movement trajectory of each cleaning box 9 is consistent and the cleaning force is uniform, which is especially suitable for cleaning the inner wall of the cylindrical fermentation tank body 1.

[0061] like Figure 1 As shown, a discharge hole is provided at the bottom of the fermentation tank body 1 , and a discharge pipe 14 connected to the discharge hole is fixedly installed, and a control valve 15 is provided on the discharge pipe 14 .

[0062] Further explanation: the design of the discharge pipe 14 and the control valve 15 at the bottom of the fermentation tank body 1 facilitates the rapid discharge of the material after the fermentation is completed, and the valve can accurately control the discharge speed to avoid residue;

[0063] The discharge hole is located below the bottom plane of the tank, ensuring that the material is completely emptied, reducing the accumulation of residual material before cleaning, and reducing the difficulty of subsequent cleaning.

[0064] like Figure 1 and Figure 4 As shown, a sealing mechanism is provided at the bottom of the cleaning box 9, including:

[0065] A sealing circular plate 16 fixedly mounted on the bottom of the cleaning box 9;

[0066] A sealing circular groove 17 is provided on the inner wall of the sliding hole 7;

[0067] The outer side wall of the sealing circular plate 16 is slidably connected to the inner side wall of the sealing circular groove 17 .

[0068] Further explanation, the sliding cooperation between the sealing circular plate 16 and the sealing circular groove 17 forms a dynamic seal during the lifting process of the cleaning box 9, preventing the cleaning liquid in the tank from leaking from the sliding hole 7, while allowing the lifting slide tube 8 to move freely in the vertical direction;

[0069] The sealing structure isolates the inside of the tank from the external environment, preventing external dust and microorganisms from entering the tank during the cleaning process, and ensuring the sterile state after cleaning.

[0070] like Figure 1 and Figure 2 As shown, the inner wall of the fermentation tank body 1, the sealing cover 2 and the sealing circular plate 16 are all made of food-grade stainless steel.

[0071] Further explanation: Food-grade stainless steel (such as 316L) has a smooth surface (roughness Ra ≤ 0.8 μm), is not easy to adhere to milk scale and microorganisms, and is resistant to corrosion by cleaning fluids such as lactic acid and sodium hydroxide. It will not rust or deform after long-term use.

[0072] The material complies with food safety standards such as GB4806.9, has no risk of heavy metal migration, and ensures that dairy products are not contaminated by the material during the fermentation and cleaning process.

[0073] like Figure 2 As shown, an annular groove is opened on the side wall of the sealing circular plate 16, and a food-grade nitrile rubber O-ring is embedded in the annular groove. The sealing circular plate 16 is interference-sealed with the inner wall of the sealing circular groove 17 through the O-ring.

[0074] It is further explained that the interference fit of the food-grade nitrile rubber O-ring provides a reliable seal during dynamic sliding (e.g., it withstands a cleaning pressure of 0.5 MPa without leakage), effectively preventing the cleaning liquid from leaking above the sealing cover 2;

[0075] The position of the O-ring is as follows: Figure 2 As shown in the figure, the O-ring is embedded in the annular groove to prevent the seal from shifting or wearing during the lifting process, thereby extending the life of the seal and reducing the maintenance frequency (such as extending the replacement cycle from 3 months to more than 6 months).

[0076] like Figure 1 、 Figure 3 and Figure 5 As shown, a driving mechanism is provided at the bottom of the lifting plate 6, including:

[0077] A plurality of support plates 18 fixedly mounted on the bottom of the lifting plate 6;

[0078] A first rotating shaft 19 and a second rotating shaft 20 rotatably connected to the support plate 18;

[0079] Chain discs are sleeved on the outside of the first rotating shaft 19 and the second rotating shaft 20, and chains 21 are engaged with the chain discs;

[0080] The bevel gears are fixedly sleeved on the first rotating shaft 19 and the outer side of the lifting slide 8, and the adjacent bevel gears are meshed with each other;

[0081] A plurality of racks 22 fixedly mounted on the top of the sealing cover 2;

[0082] A spur gear 23 is fixedly sleeved on the outer side of the second rotating shaft 20 and meshes with the adjacent rack 22 .

[0083] To further illustrate, when the lifting plate 6 moves, the spur gear 23 rolls along the rack 22, and through the chain 21 and the bevel gear transmission, drives the cleaning brush 11 to rotate synchronously (the speed is about 10-30rpm), forming a "lifting + rotation" compound cleaning action. Compared with the traditional fixed brush, the decontamination ability is improved by more than 40%;

[0084] The mechanical transmission structure does not require an additional power source (such as a motor) and only uses the linear motion of the cylinder 5 to convert into rotational motion, reducing energy consumption and equipment costs. It also has a stable transmission ratio and is easy to maintain.

[0085] like Figure 1 As shown, a plurality of through holes 24 for the racks 22 to pass through are formed on the top of the lifting plate 6 .

[0086] Further, the through hole 24 provides a movement guide channel for the rack 22, ensuring that the spur gear 23 and the rack 22 are always in meshing state, avoiding transmission jamming or failure caused by deviation of the rack 22 when the lifting plate 6 is raised or lowered;

[0087] The precise hole design (e.g., the hole diameter is 0.2 mm larger than the width of the rack 22) balances the freedom of movement and transmission stability, ensuring long-term reliable operation of the drive mechanism.

[0088] like Figure 3 and Figure 5 As shown, a protective cover 25 is provided on the outside of the bevel gear, and the protective cover 25 is fixedly installed on the outside of the support plate 18.

[0089] To further illustrate, the protective cover 25 isolates the bevel gear from the cleaning environment, preventing cleaning fluid, milk stains or impurities from entering the transmission components, and avoiding clogging or corrosion at the gear meshing (such as rust caused by salt stains).

[0090] The functional principle of this utility model can be explained through the following operation modes:

[0091] 1. Material emptying and initial state confirmation

[0092] Discharge of fermentation materials:

[0093] Open the control valve 15 on the discharge pipe 14 at the bottom of the fermentation tank body 1 to completely discharge the fermented dairy product material in the tank to the subsequent processing equipment to ensure that there is no residue in the tank.

[0094] Close the discharge valve:

[0095] After the material is emptied, the control valve 15 is closed to block the discharge pipe 14 from communicating with the outside world, and prepare for cleaning.

[0096] 2. Start the cleaning mechanism and lower it into the tank

[0097] Activate cylinder 5 drive:

[0098] Through the equipment control system or external switch, the cylinder 5 fixed on the top of the sealing cover 2 is started. The piston rod of the cylinder 5 extends downward, driving the lifting plate 6 connected at the end to move downward synchronously.

[0099] The lifting slide tube 8 slides along the slide hole 7:

[0100] The multiple lifting slides 8 rotatably connected to the bottom of the lifting plate 6 descend with the lifting plate 6 and slide vertically along the inner wall of the sliding hole 7 at the top of the sealing cover 2 until the cleaning box 9 moves with the lifting slides 8 to the lower part of the fermentation tank body 1 (close to the bottom of the tank).

[0101] 3. Drive the cleaning brush 11 to rotate

[0102] Triggering the mechanical transmission mechanism:

[0103] During the descent of the lifting plate 6, the rack 22 fixed on the top of the sealing cover 2 passes through the through hole 24 on the top of the lifting plate 6 and engages with the spur gear 23 on the outside of the second rotating shaft 20. As the lifting plate 6 moves, the spur gear 23 rolls along the rack 22 and drives the first rotating shaft 19 to rotate through the chain 21.

[0104] The bevel gear meshing drives the brush to rotate:

[0105] The first rotating shaft 19 meshes with the bevel gear on the outside of the lifting slide 8, transmitting the rotation to the lifting slide 8, causing the cleaning brush 11 fixed to the outer wall of the cleaning box 9 to start rotating around the axis of the lifting slide 8, forming a rotary cleaning action.

[0106] 4. Inject cleaning fluid and perform cleaning procedure

[0107] Open valve 12 of liquid storage tank:

[0108] Open the liquid outlet valve of the liquid storage tank 12 on the top of the sealing cover 2, and the cleaning liquid (such as warm water, alkaline detergent or acidic disinfectant) pre-stored in the liquid storage tank 12 flows into the lifting slide 8 through the connecting pipe 13.

[0109] Cleaning liquid spray and brush friction cooperation:

[0110] The cleaning liquid flows into the cleaning box 9 through the lifting slide 8 and is evenly sprayed out from the liquid outlet holes 10 distributed in a circular array on the side wall, covering the inner wall of the fermentation tank body 1. At the same time, the rotating cleaning brush 11 contacts the inner wall of the tank body and removes attached milk scale, microbial film and other pollutants through physical friction.

[0111] Control the reciprocating motion of the cleaning mechanism:

[0112] The lifting plate 6 is controlled by the cylinder 5 to move back and forth (rising to below the sealing cover 2 and descending to near the bottom of the tank), driving the cleaning box 9 to move up and down along the inner wall of the tank, so that the cleaning liquid spray range covers the entire tank, and the brush simultaneously completes the scrubbing of the inner wall of the entire tank.

[0113] 5. Reset and drain after cleaning

[0114] Stop the cleaning fluid supply:

[0115] After the scheduled cleaning time is completed, the liquid outlet valve of the liquid storage tank 12 is closed to cut off the supply of cleaning liquid.

[0116] Raise the cleaning mechanism:

[0117] The piston rod of the cylinder 5 retracts, driving the lifting plate 6, the lifting slide 8 and the cleaning box 9 to rise until the sealing circular plate 16 at the bottom of the cleaning box 9 is out of sliding contact with the sealing circular groove 17 on the inner wall of the sliding hole 7 and returns to the initial position (near the bottom of the sealing cover 2).

[0118] Discharge of sewage:

[0119] Open the control valve 15 at the bottom of the fermentation tank body 1 and discharge the remaining sewage in the tank through the discharge pipe 14 to ensure that there is no liquid accumulation in the tank.

[0120] 6. Disinfection and Drying (Optional Step)

[0121] Disinfection:

[0122] If sterilization is required, high-temperature steam or disinfectant (such as sodium hypochlorite solution) can be injected into the tank through an external pipe, and the sealing cover 2 is closed and maintained for a predetermined time before being discharged.

[0123] Store in a dry place:

[0124] After the disinfection is completed, the sealing cover 2 is opened for ventilation, or dry sterile air is introduced into the tank through the sterile air purge device to keep the inner wall of the tank dry and ready for the next use.

[0125] Operation precautions

[0126] Daily maintenance: Regularly check whether the O-ring on the outside of the sealing disc 16 is worn. If leakage is found, replace it in time. Clean the protective cover 25 of the drive mechanism to prevent debris from clogging the gear transmission components.

[0127] Selection of cleaning liquid: According to the characteristics of the fermentation material (such as high protein, high acid), select the corresponding cleaning liquid (alkaline deproteinization, acidic demineralization). The liquid storage tank 12 needs to be cleaned regularly to prevent the cleaning liquid from deteriorating.

[0128] Safe operation: Before operation, confirm that the pressure in the tank is normal pressure. Before opening the sealing cover 2, make sure that the cylinder 5 has been completely reset to avoid danger caused by accidental movement of mechanical parts.

[0129] Through the above steps, the device can realize automatic and efficient cleaning of the inner wall of the fermentation tank body 1, taking into account the spraying and mechanical scrubbing functions, and ensuring that the cleanliness of the tank body meets the hygiene standards for dairy product production.

[0130] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dairy fermentation tank with a cleaning structure, comprising a fermentation tank body (1) and a sealing cover (2) fixedly mounted on the top of the fermentation tank body (1), characterized in that: A feed hole (3) is formed on the top of the sealing cover (2), and a feed pipe (4) connected to the feed hole (3) is fixedly installed; A cleaning mechanism is provided on the top of the sealing cover (2); The cleaning mechanism comprises: A cylinder (5) fixedly mounted on the top of the sealing cover (2); A lifting plate (6) fixedly connected to the end of the piston rod of the cylinder (5); A plurality of sliding holes (7) are provided on the top of the sealing cover (2); A plurality of lifting slide tubes (8) are rotatably connected to the bottom of the lifting plate (6), wherein the lifting slide tubes (8) are slidably engaged with the inner wall of the sliding hole (7); A cleaning box (9) is fixedly mounted on the end of the lifting slide (8), wherein the side wall of the cleaning box (9) is provided with a plurality of liquid outlet holes (10) distributed in a circular array, and a plurality of cleaning brushes (11) are fixedly mounted on the outer wall thereof for contacting the inner wall of the fermentation tank body (1); A liquid storage tank (12) fixedly mounted on the top of the sealing cover (2); A connecting pipe (13) connects the liquid storage tank (12) and the lifting slide pipe (8).

2. The dairy fermentation tank with a cleaning structure according to claim 1, characterized in that: The plurality of sliding holes (7) are distributed in a circular array with the intersection of the central axis of the sealing cover (2) and the top surface as the center of the circle.

3. The dairy fermentation tank with a cleaning structure according to claim 1, characterized in that: A discharge hole is provided at the bottom of the fermentation tank body (1), and a discharge pipe (14) connected to the discharge hole is fixedly installed, and a control valve (15) is provided on the discharge pipe (14).

4. The dairy fermentation tank with a cleaning structure according to claim 1, characterized in that: The bottom of the cleaning box (9) is provided with a sealing mechanism, comprising: A sealing circular plate (16) fixedly mounted on the bottom of the cleaning box (9); A sealing circular groove (17) is provided on the inner wall of the sliding hole (7); The outer side wall of the sealing circular plate (16) is slidably connected to the inner side wall of the sealing circular groove (17).

5. The dairy fermentation tank with a cleaning structure according to claim 4, characterized in that: The inner wall of the fermentation tank body (1), the sealing cover (2) and the sealing circular plate (16) are all made of food-grade stainless steel.

6. The dairy fermentation tank with a cleaning structure according to claim 4, characterized in that: An annular groove is provided on the side wall of the sealing circular plate (16), and a food-grade nitrile rubber O-type sealing ring is embedded in the annular groove. The sealing circular plate (16) is connected to the inner side wall of the sealing circular groove (17) through the O-type sealing ring through interference sealing.

7. The dairy fermentation tank with a cleaning structure according to claim 1, characterized in that: A driving mechanism is provided at the bottom of the lifting plate (6), comprising: A plurality of support plates (18) fixedly mounted on the bottom of the lifting plate (6); Rotating a first rotating shaft (19) and a second rotating shaft (20) connected to the support plate (18); Chain discs are sleeved on the outside of the first rotating shaft (19) and the second rotating shaft (20), and chains (21) are engaged with the chain discs; The bevel gears are fixedly sleeved on the first rotating shaft (19) and the outer side of the lifting slide tube (8), and the adjacent bevel gears are meshed with each other; A plurality of racks (22) fixedly mounted on the top of the sealing cover (2); A spur gear (23) is fixedly sleeved on the outside of the second rotating shaft (20) and meshes with the adjacent rack (22).

8. The dairy fermentation tank with a cleaning structure according to claim 7, characterized in that: The top of the lifting plate (6) is provided with a plurality of through holes (24) for the racks (22) to pass through.

9. The dairy fermentation tank with a cleaning structure according to claim 7, characterized in that: A protective cover (25) is provided on the outside of the bevel gear, and the protective cover (25) is fixedly mounted on the outside of the support plate (18).

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