Malt fermentation tank and fermentation method for beer production

Through the design of the sealing mechanism and cleaning mechanism of the malt fermenter, the automatic cleaning of the defoaming plate is achieved, solving the microbial contamination caused by yeast adhesion and foam residue scaling, and ensuring the flavor and safety of beer.

CN120442336AInactive Publication Date: 2025-08-08GUANGXI JUXIN MALT CO LTD
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Patent Information

Application Number
CN202510598946.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-09
Publication Date
2025-08-08
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

During the defoaming process of existing beer fermenters, yeast adhesion and foam residues are fouled, causing microbial contamination, affecting the consistency and safety of beer flavor.

Method used

A malt fermenter was designed to realize automatic cleaning of the defoaming plate through the cooperation of the sealing mechanism and the cleaning mechanism, and use detergents to dissolve yeast residues and proteins to avoid microbial contamination.

Benefits of technology

It improves the cleaning efficiency of the defoaming plate, ensures the consistency of beer flavor and production safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The malt fermentation tank comprises a fermentation tank body, supporting legs are fixedly welded to the positions, close to the four corners, of the bottom of the fermentation tank body, anti-skid glue is arranged at the bottoms of the supporting legs, and a discharging pipe is arranged at the position, close to the bottom, of the left side of the fermentation tank body. A feeding pipe is arranged at the position, close to the top, of the right side of the fermentation tank, a sealing mechanism is fixedly connected to the top end of the fermentation tank, and a cleaning mechanism is attached to the top of the sealing mechanism. The defoaming plate is soaked in the cleaning agent, protein and yeast residues are dissolved, microbial contamination is avoided, and the consistency of the beer flavor is guaranteed.
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Description

Technical Field

[0001] The present invention relates to the technical field of fermentation tanks, in particular to a malt fermentation tank and a fermentation method for beer production. Background Art

[0002] Fermentation tanks are key equipment used to convert wort into beer. They provide an ideal environment for yeast to convert the fermentable sugars in the wort into alcohol and carbon dioxide. Their design, temperature control, and yeast management directly determine the beer's alcohol content, flavor complexity, and mouthfeel. Modern craft breweries often achieve unique flavors through customized fermentation tanks (e.g., temperature and pressure control), while industrial breweries rely on large conical tanks for efficient, standardized production.

[0003] In beer production, over-fermentation and boiling are two typical abnormal phenomena in the use of fermentation tanks, which may lead to beer loss, equipment contamination and even safety hazards. Therefore, in order to solve this problem, a mechanical defoamer, such as a rotary blade defoamer, needs to be installed inside the fermentation tank.

[0004] During the fermentation process, the yeast carried by the foam will adhere to the gaps between the blades and the bearings. In addition, the organic matter remaining after the foam bursts may form scale on the blade surface. If the blades are not cleaned in time, the residue will cause bacteria such as lactic acid bacteria and acetic acid bacteria to grow, making the beer sour or smelly, and contaminating subsequent fermentation batches. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A malt fermentation tank for beer production, comprising a fermentation tank, wherein support legs are fixedly welded near the four corners of the bottom of the fermentation tank, and the bottoms of the support legs are provided with anti-slip rubber. A discharge pipe is provided on the left side of the fermentation tank near the bottom, and a feed pipe is provided on the right side of the fermentation tank near the top;

[0007] A closing mechanism is fixedly connected to the top of the fermentation tank, and a cleaning mechanism is attached to the top of the closing mechanism.

[0008] Preferably, the closing mechanism includes a closing frame, a plurality of oblique openings are opened on the top of the closing frame, and the plurality of oblique openings are arranged in a circular array with the center of the closing frame as the center, a strip opening is opened on the front side of the closing frame, and the strip opening and the inner cavity of the closing frame are mutually connected.

[0009] Preferably, the bottom of the closed frame is fixedly connected to a guide plate, a guide groove is provided on the guide plate, the cross-section of the guide groove is hexagonal, six movable plates are slidably connected to the guide groove, the six movable plates are arranged in a circular array with the center of the closed frame as the center, several of the movable plates are fixedly connected to the tops of fitting rods, the fitting rods are fitted with adjacent oblique openings, the closed frame and the guide plate are both provided with circular openings at the center of the circle, and a linkage plate is fixedly connected to the front side of the guide plate.

[0010] Preferably, the top of the closed frame is fixedly connected to a movable frame, the inner cavity of the movable frame has an inner ring, the bottom of the inner ring is fixedly connected to a number of L-shaped connecting plates, the several L-shaped connecting plates are arranged in a circular array with the center of the movable frame as the center, and the other sides of the several L-shaped connecting plates are fixedly connected to the bottom of the movable frame.

[0011] Preferably, the cleaning mechanism includes a motor, the motor power output shaft is fixedly connected to the center shaft, a bearing is installed on the outside of the center shaft near the bottom end, the bearing is fixedly connected to the inner ring, and a plurality of defoaming plates are fixedly connected to the outside of the center shaft near the bottom end. The plurality of defoaming plates are arranged in a circular array with the center of the center shaft as the center, and the defoaming plates are located below the inner ring.

[0012] Preferably, two material storage frames are fixedly sleeved on the outer side of the central axis near the top, and the two material storage frames are symmetrically arranged up and down. An annular groove is opened on the corresponding side of the two material storage frames, and an annular baffle is fitted between the two annular grooves.

[0013] Preferably, a collar is fixedly connected to the outer side of the central axis near the bottom end, and a plurality of fixed plates are fixedly connected to the outer side of the collar. The plurality of fixed plates are arranged in a circular array with the collar center as the center, and movable boxes are fixedly connected to the opposite sides of the plurality of fixed plates, and rollers are hinged to the corresponding sides of the plurality of movable boxes, and the outer sides of the rollers are in contact with the movable frame.

[0014] Preferably, the top of the movable box is hinged with a guide wheel, and a plurality of discharge pipes are inserted into the outer side of the annular baffle, and the outer side of the discharge pipe is in contact with the guide wheel. A discharge pipe is inserted into the bottom of the movable box, and the bottom end of the discharge pipe passes through the movable frame and the inner ring. Two sliding grooves are provided at the bottom of the inner cavity of the movable box, and both of the sliding grooves are slidably connected to the limit blocks, and the tops of the two limit blocks are fixedly connected with an opening and closing plate.

[0015] Preferably, a plurality of support blocks are fixedly connected to the top of the material storage frame, and the support blocks are arranged in a circular array with the center of the central axis as the center. A lifting ring is sleeved on the outside of the central axis near the top, and a plurality of hinge blocks are fixedly connected to the lifting ring. A flip block is hinged between the hinge block and the support block, and a pull rope is fixedly connected to the other side of the flip block. The other end of the pull rope is fixedly connected to the opening and closing plate, the outer side of the lifting ring is fixedly connected to an upper plate, the bottom of the upper plate is fixedly connected to a cylinder, the outer side of the cylinder is fixedly connected to a lower plate, and the other side of the lower plate is fixedly connected to the ring.

[0016] A fermentation method for a malt fermenter for beer production comprises the following steps:

[0017] S1: When the defoaming plate needs to be cleaned, the linkage plate can be pushed to move first. When the linkage plate moves, the guide plate can be driven to rotate. When the guide plate rotates, it is slidably connected with the movable plate through the guide groove, and can drive several movable plates to move. When the movable plate moves, it fits with the oblique opening through the fitting rod and can move along the oblique opening, thereby realizing the synchronous movement of several movable plates in opposite directions to close the circular opening;

[0018] S2: When the circular mouth is closed, the motor can be started to drive the central shaft to rotate. When the central shaft rotates, it can drive several fixed plates to rotate through the collar. The fixed plates can drive the movable boxes to rotate. When the movable boxes rotate, the cleaning efficiency can be improved. The staff can add cleaning agent to the inside of the storage frame, and the cleaning agent can be evenly distributed to several movable boxes through the discharge pipe.

[0019] S3: When the cylinder is started, the upper plate can be lifted and moved through the power output shaft. When the upper plate moves, it can drive the lifting ring to move. When the lifting ring moves, it can drive several hinged blocks to move synchronously. When the hinged block moves, it can cooperate with the support block to flip the flip block. When the flip block flips, the opening and closing plate can be pulled by the pull rope to allow the cleaning agent to enter the inner cavity of the discharge pipe, thereby cleaning the defoaming plate. At the same time, the cleaning agent can accumulate on the top of the closed frame to further soak the defoaming plate and improve the cleaning effect.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention achieves the goal of accumulating detergent inside the closed frame and soaking the defoaming plate in the detergent through the mutual cooperation among the guide plate, movable plate, fitting rod, closed frame, linkage plate and other components, thereby dissolving protein and yeast residues, avoiding microbial contamination and ensuring the consistency of beer flavor.

[0022] 2. The present invention can drive the detergent to move and improve the initial cleaning efficiency through the mutual cooperation between the component support block, lifting ring, lower plate, cylinder, upper plate, hinge block, flip block, motor and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is an exploded view of the component closing mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the component movable frame of the present invention;

[0026] Figure 4 This is a bottom view of the movable frame structure of the component of the present invention;

[0027] Figure 5 This is a schematic diagram of the motor structure of the component of the present invention;

[0028] Figure 6 This is a top view of the movable box structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the component storage frame structure of the present invention;

[0030] Figure 8 This is a bottom view of the component storage frame structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the internal structure of the component storage frame of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the hinge block component of the present invention;

[0033] Figure 11 This is a bottom view of the opening and closing plate structure of the component of the present invention.

[0034] Numbers in the figure: 1. Fermentation tank; 2. Support legs; 3. Discharge pipe; 4. Feed pipe; 5. Movable frame; 6. Closing frame; 7. Movable plate; 8. Fitting rod; 9. Guide plate; 10. Linkage plate; 11. Inner ring; 12. L-shaped connecting plate; 13. Center axis; 14. Defoaming plate; 15. Storage frame; 16. Discharge pipe; 17. Movable box; 18. Roller; 19. Fixed plate; 20. Ring; 21. Discharge pipe; 22. Opening and closing plate; 23. Limit block; 24. Pull rope; 25. Support block; 26. Lifting ring; 27. Lower plate; 28. Cylinder; 29. Upper plate; 30. Articulated block; 31. Flipping block; 32. Motor. DETAILED DESCRIPTION

[0035] See also Figure 1-11 , the present invention provides a technical solution:

[0036] A malt fermentation tank for beer production, such as Figure 1 As shown, it includes a fermentation tank 1, and support legs 2 are fixedly welded near the four corners of the bottom of the fermentation tank 1. The bottom of the support legs 2 is provided with anti-slip glue. A discharge pipe 3 is provided on the left side of the fermentation tank 1 near the bottom, and a feed pipe 4 is provided on the right side of the fermentation tank 1 near the top;

[0037] A closing mechanism is fixedly connected to the top of the fermentation tank 1, and a cleaning mechanism is attached to the top of the closing mechanism.

[0038] The closing mechanism includes a closing frame 6, a plurality of oblique openings are provided on the top of the closing frame 6, and the plurality of oblique openings are arranged in a circular array with the center of the closing frame 6 as the center, a strip opening is provided on the front side of the closing frame 6, and the strip opening and the inner cavity of the closing frame 6 are mutually connected, a guide plate 9 is fixedly connected to the bottom of the closing frame 6, a guide groove is provided on the guide plate 9, and the cross section of the guide groove is a hexagonal setting, and six movable plates 7 are slidably connected to the guide groove, and the six movable plates 7 are arranged in a circular array with the center of the closing frame 6 as the center, and a plurality of movable plates are provided. The tops of the plates 7 are fixedly connected with fitting rods 8, which fit with the adjacent bevels. The closed frame 6 and the guide plate 9 are both provided with circular openings at the centers of the circles. The front side of the guide plate 9 is fixedly connected with a linkage plate 10. The top of the closed frame 6 is fixedly connected with the movable frame 5. The inner cavity of the movable frame 5 has an inner ring 11. The bottom of the inner ring 11 is fixedly connected with a number of L-shaped connecting plates 12. The several L-shaped connecting plates 12 are arranged in a circular array with the center of the movable frame 5 as the center. The other sides of the several L-shaped connecting plates 12 are fixedly connected to the bottom of the movable frame 5.

[0039] When the defoaming plate 14 needs to be cleaned, the linkage plate 10 can be pushed to move first. When the linkage plate 10 moves, the guide plate 9 can be driven to rotate. When the guide plate 9 rotates, it is slidably connected to the movable plate 7 through the guide groove, which can drive several movable plates 7 to move. When the movable plate 7 moves, it fits with the oblique mouth through the fitting rod 8 and can move along the oblique mouth, thereby realizing the synchronous movement of several movable plates 7 in opposite directions to close the circular mouth.

[0040] The cleaning mechanism includes a motor 32, the power output shaft of the motor 32 is fixedly connected to the central shaft 13, a bearing is installed on the outside of the central shaft 13 near the bottom end, the bearing is fixedly connected to the inner ring 11, and a plurality of defoaming plates 14 are fixedly connected to the outside of the central shaft 13 near the bottom end. The plurality of defoaming plates 14 are arranged in a circular array with the center of the central shaft 13 as the center. The defoaming plates 14 are located below the inner ring 11. Two material storage frames 15 are fixedly sleeved on the outside of the central shaft 13 near the top. The two material storage frames 15 are symmetrically arranged up and down. 5 are provided with an annular groove on each side, and an annular baffle is fitted between the two annular grooves. A collar 20 is fixedly sleeved on the outside of the central shaft 13 near the bottom end, and a plurality of fixed plates 19 are fixedly connected to the outside of the collar 20. The plurality of fixed plates 19 are arranged in an annular array with the collar 20 as the center. The sides of the plurality of fixed plates 19 facing away from each other are fixedly connected to a movable box 17. The corresponding sides of the plurality of movable boxes 17 are hinged with a roller 18. The outer side of the roller 18 is fitted with the movable frame 5, and the top of the movable box 17 is hinged with a guide Wheel, a number of discharge pipes 16 are inserted into the outer side of the annular baffle, and the outer side of the discharge pipe 16 is fitted with the guide wheel. A discharge pipe 21 is inserted into the bottom of the movable box 17, and the bottom end of the discharge pipe 21 passes through between the movable frame 5 and the inner ring 11. Two chutes are provided at the bottom of the inner cavity of the movable box 17, and the two chutes are slidably connected to the limit blocks 23. The tops of the two limit blocks 23 are fixedly connected to the opening and closing plate 22. A number of support blocks 25 are fixedly connected to the top of the storage frame 15. The support blocks 25 are arranged in a circular array with the center of the central axis 13 as the center. A lifting ring 26 is sleeved on the outside of the central shaft 13 near the top. A number of hinge blocks 30 are fixedly connected to the lifting ring 26. A flip block 31 is hinged between the hinge block 30 and the support block 25. The other side of the flip block 31 is fixedly connected to the pull rope 24. The other end of the pull rope 24 is fixedly connected to the opening and closing plate 22. The outside of the lifting ring 26 is fixedly connected to the upper plate 29. The bottom of the upper plate 29 is fixedly connected to the cylinder 28. The outside of the cylinder 28 is fixedly connected to the lower plate 27. The other side of the lower plate 27 is fixedly connected to the ring 20.

[0041] When the circular mouth is closed, the motor 32 can be started to drive the central shaft 13 to rotate. When the central shaft 13 rotates, it can drive several fixed plates 19 to rotate through the collar 20, and the fixed plate 19 can drive the movable box 17 to rotate. When the movable box 17 rotates, the cleaning efficiency can be improved. The staff can add cleaning agent to the inside of the storage frame 15, and the cleaning agent can be evenly distributed to several movable boxes 17 through the discharge pipe 16. When the cylinder 28 is started, the upper plate 29 can be lifted and moved through the power output shaft. When the upper plate 29 moves, it can drive the lifting ring 26 to move. When the lifting ring 26 moves, it can drive several hinged blocks 30 to move synchronously. When the hinged block 30 moves, it can cooperate with the support block 25 to flip the flip block 31. When the flip block 31 flips, the opening and closing plate 22 can be pulled by the pull rope 24 to make the cleaning agent enter the inner cavity of the discharge pipe 21, thereby cleaning the defoaming plate 14. At the same time, the cleaning agent can accumulate on the top of the closing frame 6, further soaking the defoaming plate 14 and improving the cleaning effect.

[0042] A fermentation method for a malt fermenter for beer production comprises the following steps:

[0043] S1: When the defoaming plate 14 needs to be cleaned, the linkage plate 10 can be pushed to move first. When the linkage plate 10 moves, the guide plate 9 can be driven to rotate. When the guide plate 9 rotates, it is slidably connected with the movable plate 7 through the guide groove, and can drive several movable plates 7 to move. When the movable plate 7 moves, it fits with the oblique opening through the fitting rod 8 and can move along the oblique opening, thereby realizing the synchronous movement of several movable plates 7 in opposite directions to close the circular opening;

[0044] S2: When the round mouth is closed, the motor 32 can be started to drive the central shaft 13 to rotate. When the central shaft 13 rotates, it can drive the fixed plates 19 to rotate through the collar 20. The fixed plates 19 can drive the movable boxes 17 to rotate. When the movable boxes 17 rotate, the cleaning efficiency can be improved. The staff can add cleaning agent to the inside of the material storage frame 15. The cleaning agent can be evenly distributed to the movable boxes 17 through the discharge pipe 16.

[0045] S3: When the cylinder 28 is started, the upper plate 29 can be lifted and moved through the power output shaft. When the upper plate 29 moves, it can drive the lifting ring 26 to move. When the lifting ring 26 moves, it can drive several hinged blocks 30 to move synchronously. When the hinged block 30 moves, it can cooperate with the support block 25 to flip the flip block 31. When the flip block 31 flips, the opening and closing plate 22 can be pulled by the pull rope 24 to allow the cleaning agent to enter the inner cavity of the discharge pipe 21, thereby cleaning the defoaming plate 14. At the same time, the cleaning agent can accumulate on the top of the closed frame 6 to further soak the defoaming plate 14 and improve the cleaning effect.

Claims

1. A malt fermentation tank for beer production, comprising a fermentation tank (1), characterized in that: Support legs (2) are fixedly welded near the four corners of the bottom of the fermentation tank (1), and anti-slip rubber is provided on the bottom of the hand-supporting legs (2). A discharge pipe (3) is provided near the bottom on the left side of the fermentation tank (1), and a feed pipe (4) is provided near the top on the right side of the fermentation tank (1); A closing mechanism is fixedly connected to the top of the fermentation tank (1), and a cleaning mechanism is attached to the top of the closing mechanism.

2. A malt fermentation tank for beer production according to claim 1, characterized in that: The sealing mechanism comprises a sealing frame (6), a top of the sealing frame (6) is provided with a plurality of oblique openings, and the plurality of oblique openings are arranged in a circular array with the center of the sealing frame (6) as the center, a strip opening is provided on the front side of the sealing frame (6), and the strip opening and the inner cavity of the sealing frame (6) are mutually connected.

3. A malt fermentation tank for beer production according to claim 2, characterized in that: The bottom of the closed frame (6) is fixedly connected to a guide plate (9), and a guide groove is provided on the guide plate (9). The cross section of the guide groove is hexagonal. The guide groove is slidably connected to six movable plates (7). The six movable plates (7) are arranged in a circular array with the center of the closed frame (6) as the center. The tops of several movable plates (7) are fixedly connected to fitting rods (8), and the fitting rods (8) fit with adjacent oblique openings. The closed frame (6) and the guide plate (9) are both provided with circular openings at the center of the circle. The front side of the guide plate (9) is fixedly connected to a linkage plate (10).

4. A malt fermentation tank for beer production according to claim 3, characterized in that: The top of the closed frame (6) is fixedly connected to a movable frame (5), the inner cavity of the movable frame (5) has an inner ring (11), the bottom of the inner ring (11) is fixedly connected to a plurality of L-shaped connecting plates (12), the plurality of L-shaped connecting plates (12) are arranged in a circular array with the center of the movable frame (5) as the center, and the other sides of the plurality of L-shaped connecting plates (12) are fixedly connected to the bottom of the movable frame (5).

5. The malt fermentation tank for beer production according to claim 4, characterized in that: The cleaning mechanism comprises a motor (32), a power output shaft of the motor (32) is fixedly connected to a central shaft (13), a bearing is installed on the outer side of the central shaft (13) near the bottom end, the bearing is fixedly connected to the inner ring (11), and a plurality of defoaming plates (14) are fixedly connected on the outer side of the central shaft (13) near the bottom end, the plurality of defoaming plates (14) are arranged in a circular array with the center of the central shaft (13) as the center, and the defoaming plates (14) are located below the inner ring (11).

6. A malt fermentation tank for beer production according to claim 5, characterized in that: Two material storage frames (15) are fixedly sleeved on the outer side of the central axis (13) near the top, and the two material storage frames (15) are symmetrically arranged in an upper and lower direction. An annular groove is provided on the corresponding side of the two material storage frames (15), and an annular baffle is fitted between the two annular grooves.

7. A malt fermentation tank for beer production according to claim 6, characterized in that: A collar (20) is fixedly sleeved on the outer side of the central axis (13) near the bottom end, and a plurality of fixed plates (19) are fixedly connected to the outer side of the collar (20). The plurality of fixed plates (19) are arranged in a circular array with the collar (20) as the center. The opposite sides of the plurality of fixed plates (19) are fixedly connected to movable boxes (17), and the corresponding sides of the plurality of movable boxes (17) are hinged to rollers (18), and the outer sides of the rollers (18) are in contact with the movable frame (5).

8. The malt fermentation tank for beer production according to claim 7, characterized in that: The top of the movable box (17) is hinged with a guide wheel, and a plurality of discharge pipes (16) are inserted on the outer side of the annular baffle. The outer side of the discharge pipe (16) is in contact with the guide wheel. The bottom of the movable box (17) is inserted with a discharge pipe (21). The bottom end of the discharge pipe (21) passes through between the movable frame (5) and the inner ring (11). Two sliding grooves are provided at the bottom of the inner cavity of the movable box (17). Both of the sliding grooves are slidably connected to the limit blocks (23). The tops of the two limit blocks (23) are fixedly connected to an opening and closing plate (22).

9. The malt fermentation tank for beer production according to claim 8, characterized in that: The top of the material storage frame (15) is fixedly connected to a plurality of support blocks (25), and the plurality of support blocks (25) are arranged in a circular array with the center of the central axis (13) as the center. A lifting ring (26) is sleeved on the outer side of the central axis (13) near the top. The lifting ring (26) is fixedly connected to a plurality of hinge blocks (30). A flip block (31) is hinged between the hinge block (30) and the support block (25). The flip block (31) is fixedly connected to a pull rope (24) on the other side. The other end of the pull rope (24) is fixedly connected to the opening and closing plate (22). The outer side of the lifting ring (26) is fixedly connected to an upper plate (29). The bottom of the upper plate (29) is fixedly connected to a cylinder (28). The outer side of the cylinder (28) is fixedly connected to a lower plate (27). The other side of the lower plate (27) is fixedly connected to the sleeve ring (20).

10. The fermentation method of a malt fermenter for beer production according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: When the defoaming plate (14) needs to be cleaned, the linkage plate (10) can be pushed to move first. When the linkage plate (10) moves, the guide plate (9) can be driven to rotate. When the guide plate (9) rotates, it is slidably connected with the movable plate (7) through the guide groove, and can drive several movable plates (7) to move. When the movable plate (7) moves, it fits with the oblique opening through the fitting rod (8) and can move along the oblique opening, thereby realizing the synchronous movement of several movable plates (7) to close the circular opening; S2: When the circular opening is closed, the motor (32) can be started to drive the central shaft (13) to rotate. When the central shaft (13) rotates, the plurality of fixed plates (19) can be driven to rotate through the collar (20). The fixed plates (19) can drive the movable boxes (17) to rotate. When the movable boxes (17) rotate, the cleaning efficiency can be improved. The staff can add cleaning agent to the inside of the material storage frame 15. The cleaning agent can be evenly distributed to the plurality of movable boxes (17) through the discharge pipe 16. S3: When the cylinder (28) is started, the upper plate (29) can be lifted and moved by the power output shaft. When the upper plate (29) moves, the lifting ring (26) can be driven to move. When the lifting ring (26) moves, the hinge blocks (30) can be driven to move synchronously. When the hinge blocks (30) move, they can cooperate with the support blocks (25) to make the flip blocks (31) flip. When the flip blocks (31) flip, the opening and closing plates (22) can be pulled by the pull rope (24), so that the cleaning agent enters the inner cavity of the discharge pipe (21), thereby cleaning the defoaming plate (14). At the same time, the cleaning agent can be accumulated on the top of the closed frame (6), further soaking the defoaming plate (14) and improving the cleaning effect.