Wet-state temporary storage device for distiller's grains

Abstract

This utility model relates to a wet temporary storage device for brewing waste, including a storage tank and a feeding assembly. The feeding assembly includes a feeding channel communicating with the storage tank, and a feeding hopper is provided on the side wall of the feeding channel. A pull-out box is radially movably arranged on the feeding channel, and a sealing plate and a brush that can move axially along the feeding channel are installed inside the pull-out box. When the pull-out box moves to the position where the sealing plate is inside the feeding channel, the sealing plate can be pushed out of the pull-out box to block the feeding hopper, thereby keeping the storage tank sealed. When the pull-out box moves to the position where the brush is inside the feeding channel, the brush can be pushed out of the pull-out box and reciprocate axially along the feeding channel to clean the feeding channel. The sealing plate of this wet temporary storage device for brewing waste effectively seals the feed inlet and maintains the internal airtightness of the storage tank when in the working position, effectively preventing the evaporation of moisture from the brewing waste. Furthermore, the axial reciprocating motion of the brush can clean the feeding channel from all angles, making it particularly suitable for handling viscous and moist brewing waste.

Description

Technical Field

[0001] This utility model relates to the field of brewing waste preservation technology, and in particular to a wet temporary storage device for brewing waste. Background Technology

[0002] Brewing waste is a solid byproduct of baijiu (Chinese liquor) brewing. Approximately 3-5 tons of wet brewing waste (60-70% moisture content) are produced for every ton of baijiu (65% vol) produced. In 2023, the total output of large-scale baijiu enterprises in China reached 6.29 million kiloliters, generating approximately 25 million tons of distiller's grains. After drying, brewing waste generally contains 8%-12% starch, 10%-12% protein, 3%-5% fat, 30%-35% cellulose, and 15%-20% hemicellulose. Brewing waste has a high organic matter content (COD of wet distiller's grains can reach 50,000-100,000 mg / L), is prone to leakage, and has a high content of organic acids such as lactic acid and acetic acid (pH 3.5-5.5), which can easily corrode equipment. It also contains yeast residues and undecomposed Aspergillus, making it susceptible to mold growth. If not properly treated, it is extremely prone to mold and rancidity, rendering it unusable.

[0003] The main ways to utilize brewing waste are as feed, energy, and high-value extraction. Biorefining it into ethanol, acetone, lactic acid chemical raw materials, and high-value-added biological products such as polyglutamic acid, succinic acid, and aminobutyric acid has become a research hotspot.

[0004] In the open production process of brewing, the composition of brewing waste varies from batch to batch. Biorefining often involves a series of processes such as degradation, fermentation, separation, and testing. Each batch of experiments requires a cycle of 1-2 months. Maintaining the stability of the physicochemical and biological properties of the brewing waste used in each batch is crucial for biorefining research. However, problems such as high water content leading to leakage, organic matter being prone to mold growth, and high organic acid content corroding equipment significantly limit the consistency and accuracy of wet-state experiments on brewing waste.

[0005] CN216234969U discloses a device for quantitatively adding rice husks for brewing. However, this device does not include a structure to keep the storage tank airtight, which leads to problems such as leakage and evaporation of the high-moisture-content wet waste. Long-term storage may cause the moisture content of the brewing waste to decrease, affecting related experimental research. In addition, wet brewing waste has a high organic matter content and easily adheres to the channel walls. The device does not have a corresponding cleaning structure for the characteristics of wet brewing waste, which may lead to channel blockage caused by material accumulation.

[0006] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0007] In view of the shortcomings of the prior art, this application proposes a temporary storage device for brewing waste, and more particularly a wet temporary storage device for brewing waste, which aims to solve one or more technical problems in the prior art.

[0008] This utility model relates to a wet temporary storage device for brewing waste, including a storage tank and a feeding assembly. The feeding assembly includes a feeding channel communicating with the storage tank, and a feeding hopper is provided on the side wall of the feeding channel. A pull-out box is movably arranged radially on the feeding channel, and a sealing plate and a brush that can move axially along the feeding channel are provided inside the pull-out box. When the pull-out box moves to the point where the sealing plate is located in the feeding channel, the sealing plate can be pushed out of the pull-out box to block the feeding hopper, thereby keeping the storage tank sealed. When the pull-out box moves to the point where the brush is located in the feeding channel, the brush can be pushed out of the pull-out box and reciprocate along the axial direction of the feeding channel to clean the feeding channel.

[0009] The sealing plate of this wet temporary storage device for brewing waste effectively seals the feed inlet and maintains the internal airtightness of the storage tank when in the working position, effectively preventing moisture evaporation and microbial contamination of the brewing waste, while also preventing the introduction of external pollutants. In cleaning mode, the axial reciprocating motion of the brushes can clean the feed channel in all directions, solving the cleaning dead spots problem of traditional fixed cleaning mechanisms, and is particularly suitable for processing viscous and moist brewing lees. This device can ensure the stability of the physical, chemical, and biological properties of brewing waste, thereby ensuring the consistency and accuracy of the biorefining experimental research process for brewing waste.

[0010] Preferably, the feeding assembly includes an operating chamber connected to the feeding channel, which houses a rotatable cam. The cam drives a sealing plate or brush to move axially along the feeding channel via rotation. Through the matching design between the cam profile and the sealing plate / brush transmission components, not only can the sealing plate withstand axial locking force in the closed state, enhancing the stability of the feed inlet seal, but the rotation of the cam also enables the brush to reciprocate, adapting to the cleaning needs of waste residues of different viscosities.

[0011] Preferably, the side wall of the operating chamber is equipped with a knob and a rotating shaft. The knob is fixed to one end of the rotating shaft, which passes through the mounting hole of the operating chamber and connects to the rotation axis of the cam. By fixing the knob to one end of the rotating shaft and directly connecting the rotating shaft to the rotation axis of the cam after passing through the mounting hole of the operating chamber, the operator can directly drive the cam to rotate around its axis simply by turning the knob outside the operating chamber. This structure achieves efficient transmission of manual operating force to cam rotational power, ensuring the reliability of the cam driving the movement of the sealing plate or brush.

[0012] Preferably, the cam has a structure including a long axis and a short axis. When the long axis of the cam is perpendicular to the end face of the sealing plate or brush rod, it drives the sealing plate to block the feed hopper or the brush to extend the maximum length into the feed channel. When the short axis of the cam is perpendicular to the end face of the sealing plate or brush rod, it drives the sealing plate or brush rod to retract into the pull-out box. This structure utilizes the rotational motion of a single cam to synchronously achieve the switching between closing and cleaning functions of the feed channel and the control of the extreme positions of moving parts. It eliminates the need for an additional positioning mechanism, simplifies the operating logic, and ensures reliable locking of the action state.

[0013] Preferably, the side wall of the operating chamber has two second through holes; when the rod of the sealing plate or brush retracts into the pull-out box, the portion extending into the operating chamber enters and exits through the second through holes. This structure provides a physical clearance channel for the displacement of moving parts within the operating chamber, ensuring that during the radial pulling of the pull-out box along the feeding channel, there is no mechanical interference between the sealing plate and brush rod and the operating chamber wall, while maintaining the sealing of the internal space of the operating chamber, preventing external contaminants from entering the feeding channel and storage tank through the movement gaps.

[0014] Preferably, the top and bottom surfaces of the operating chamber are provided with a third through hole; when the short shaft of the cam abuts against the end face of the sealing plate or the brush rod, the end of the long shaft of the cam extends out of the operating chamber through the third through hole. This third through hole provides physical clearance space for the maximum radial dimension of the cam profile, ensuring that the cam is not mechanically interfered with by the inner wall of the operating chamber during continuous rotation, thereby ensuring the smooth reset of the sealing plate and the brush rod under the action of the elastic element and the integrity and continuity of the cam rotation action.

[0015] Preferably, the side wall of the sealing plate is provided with a first stop and a first elastic element; one end of the first elastic element is connected to the first stop, and the other end is connected to the inner wall of the pull-out box, so that the end face of the sealing plate always abuts against the outer contour of the cam. This structure realizes the automatic reset function of the sealing plate under the drive of the cam, ensuring the real-time tracking of the movement trajectory of the sealing plate and the cam, avoiding position drift caused by mechanical backlash, and at the same time, the rigid abutment between the first stop and the inner wall of the pull-out box restricts the sealing plate from excessively retracting into the operating chamber, ensuring the smooth radial movement of the pull-out box.

[0016] Preferably, the side wall of the rod is provided with a second stop and a second elastic element; one end of the second elastic element is connected to the second stop, and the other end is connected to the inner wall of the pull-out box, so that the end face of the rod always abuts against the outer contour of the cam. This structure realizes the automatic reset function of the brush under the drive of the cam, ensuring the real-time synchronization between the brush bearing structure and the cam movement trajectory, avoiding the sluggishness or stroke deviation of the brush reciprocating cleaning action caused by mechanical clearance, thereby ensuring the integrity and consistency of the cleaning effect of the feeding channel.

[0017] Preferably, the gap between the pull-out box and the second through hole is filled with a flexible sealing material. This structure ensures smooth radial movement of the pull-out box while effectively preventing external atmosphere from intruding into the feed channel and storage tank through the gaps in the side wall of the operating chamber. This maintains the airtight environment of the storage tank and prevents brewing waste from experiencing a decrease in moisture content or mold growth due to contact with air, thereby ensuring the stability of the physicochemical properties of the temporarily stored waste.

[0018] Preferably, the storage tank is equipped with an agitator, which is connected to a motor on the top of the tank via a drive shaft. Agitation helps maintain uniform moisture distribution in the brewing waste during wet storage, effectively preventing differences in material moisture content caused by localized evaporation or sedimentation. This maintains the uniformity and stability of the physicochemical properties of the brewing waste, providing a consistent raw material base for subsequent biorefining experiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a preferred wet temporary storage device for brewing waste according to this utility model;

[0020] Figure 2 This is a schematic diagram of the outer frame of a preferred feeding assembly according to this utility model;

[0021] Figure 3 This is a cross-sectional view of the internal structure of a preferred feeding assembly of this utility model from one angle;

[0022] Figure 4 This is a cross-sectional view of the internal structure of a preferred feeding assembly of this utility model from another angle;

[0023] Figure 5 This is a schematic diagram of the structure of a preferred feeding assembly of the present invention when the long shaft of the cam forms an angle with the end face of the sealing plate;

[0024] Figure 6 This is a schematic diagram of the structure of a preferred feeding assembly of the present invention when the short shaft of the cam is perpendicular to the end face of the sealing plate;

[0025] Figure 7 This is a schematic diagram of the structure of a preferred feeding assembly of the present invention when the short shaft of the cam is perpendicular to the end face of the rod.

[0026] Figure 8 This is a schematic diagram of the structure of a preferred feeding assembly of the present invention when the long axis of the cam is perpendicular to the end face of the rod.

[0027] Figure 9 This is a schematic diagram of the overall structure of a preferred sealing plate according to this utility model;

[0028] Figure 10 This is a schematic diagram of the overall structure of a preferred rod with a brush according to this utility model.

[0029] List of reference numerals

[0030] 100: Storage tank; 110: Agitator; 120: Discharge port; 130: Motor; 200: Feeding assembly; 210: Feeding channel; 211: Feeding hopper; 212: Feeding inlet; 213: First through hole; 220: Operating chamber; 221: Knob; 222: Cam; 222.1: Long shaft; 222.2: Short shaft; 223: Second through hole; 224: Third through hole; 225: Assembly hole; 226: Rotating shaft; 230: Pull-out box; 231: Sealing plate; 232: First stop block; 233: First elastic element; 234: Rod body; 235: Brush; 236: Second stop block; 237: Second elastic element. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings.

[0032] This embodiment relates to a wet temporary storage device for brewing waste, such as... Figure 1 As shown, the system includes a storage tank 100 for storing brewing waste and a feeding assembly 200 for feeding the brewing waste into the storage tank 100. An agitator 110 is installed inside the storage tank 100, which is connected to a motor 130 mounted on the top of the storage tank 100 via a vertical drive shaft. The operator starts the motor 130 as needed, which drives the drive shaft to rotate the circumferential blades of the agitator 110. This agitation helps maintain a uniform moisture content in the brewing waste within the tank. Furthermore, a discharge port 120 is located at the bottom of the storage tank 100 for easy discharge of the brewing waste when necessary.

[0033] Combination Figure 1 and Figure 2 The feeding assembly 200 is disposed on the peripheral wall of the storage tank 100 near the top, and includes a feeding channel 210 communicating with the storage tank 100. This feeding channel 210 is a hollow channel through which brewing waste enters the storage tank 100 from the outside. A feeding hopper 211 is connected to the side wall of the feeding channel 210. The top of the feeding hopper 211 has a funnel-shaped open structure, and its bottom is inserted into the feeding channel 210, forming a feeding inlet 212 (e.g., ...) within the feeding channel 210. Figure 3(As shown). Brewing waste enters through the feed hopper 211, and then enters the storage tank 100 through the feed inlet 212 and the feed channel 210.

[0034] Combination Figure 2 and Figure 3 The feed channel 210 has two first through holes 213 formed radially therein. The outer diameter of the pull-out box 230 matches the diameter of the first through holes 213, so that when the operator applies a pulling force, the pull-out box 230 can reciprocate radially along the feed channel 210. The stroke of the pull-out box 230 ensures that it is always partially inside and partially outside the feed channel 210 during its movement. The operator can change the position of the pull-out box 230 by pulling it out, thereby switching the feed assembly 200 to different working states.

[0035] See Figure 3 The pull-out box 230 is equipped with a sealing plate 231 that can move axially along the feed channel 210. The sealing plate 231 can be block-shaped or plate-shaped, with a flat surface and a top surface area larger than the feed inlet 212 formed by the feed hopper 211 within the feed channel 210. When the pull-out box 230 moves radially along the feed channel 210 until the sealing plate 231 is located within the feed channel 210, the feed assembly 200 switches to a sealed state. At this time, the sealing plate 231 can be pushed out of the pull-out box 230, its top completely covering and sealing the feed inlet 212, keeping the storage tank 100 sealed.

[0036] See Figure 8 The pull-out box 230 is also equipped with a brush 235 that can move axially along the feed channel 210. The brush 235 is arranged side by side with the sealing plate 231 inside the pull-out box 230. When the pull-out box 230 moves radially along the feed channel 210 until the sealing plate 231 moves out of the feed channel 210 and the brush 235 enters the feed channel 210, the feeding assembly 200 switches to the cleaning state. At this time, the brush 235 can be pushed out of the pull-out box 230 and reciprocate axially along the feed channel 210 to clean the feed channel 210.

[0037] Combination Figure 2 and Figure 3 The feeding assembly 200 includes an operating chamber 220 connected to the feeding channel 210. The operating chamber 220 contains a rotatable cam 222, whose rotation drives a sealing plate 231 or a brush 235 to move axially along the feeding channel 210. According to a preferred embodiment, each of the two side walls of the operating chamber 220 has a mounting hole 225 corresponding to the rotation axis of the cam 222, for mounting a rotating shaft 226 arranged along the rotation axis. A knob 221 connected to the rotating shaft 226 is provided outside one of the mounting holes 225 in the operating chamber 220; the operator can drive the cam 222 to rotate by turning the knob 221.

[0038] Preferably, such as Figure 4 As shown, the cam 222 has an elliptical profile and includes a major axis 222.1 and a minor axis 222.2. The major axis 222.1 of the cam 222 provides the maximum thrust, while the minor axis 222.2 provides the maximum return. Those skilled in the art will appreciate that, although not shown in the figure, the cam 222 can also employ other configurations, such as a disc cam 222 or other structures with varying radial profile dimensions. When such a cam 222 rotates about its axis, it contacts the end plate 231 or brush 235 through its varying profile curve, achieving the desired reciprocating or intermittent motion.

[0039] Combination Figures 4-6 Taking the movement of the sealing plate 231 in the pull-out box 230 as an example, the working mechanism of the cam 222 is explained. Figure 4 As shown, when the cam 222 rotates to the point where its long axis 222.1 is perpendicular to the end face of the sealing plate 231, the length of the sealing plate 231 extending into the feed channel 210 reaches its maximum, and its top completely blocks the feed inlet 212. Figure 5 As shown, when the cam 222 rotates to the point where its major axis 222.1 forms an angle with the end face of the sealing plate 231, the contour of the cam 222 pushes the sealing plate 231 to move axially along the feed channel 210 toward the operating chamber 220, and the length of the sealing plate 231 within the feed channel 210 gradually decreases accordingly. Figure 6 As shown, when cam 222 rotates to the point where its short axis 222.2 is perpendicular to the end face of sealing plate 231, sealing plate 231 retracts into pull-out box 230, and feed inlet 212 reopens. After the brewing waste is fed, the operator controls cam 222 to rotate via knob 221, locking it in the position where sealing plate 231 blocks feed inlet 212, thereby closing feed channel 210, maintaining the airtight environment of storage tank 100, and preventing the moisture content of waste from decreasing due to evaporation into the environment.

[0040] Combination Figure 7 and Figure 8 The brush 235 in the pull-out box 230 can be fixed to the peripheral wall of a rod 234 by adhesive bonding. The rod 234 serves as the supporting structure for the brush 235 and moves axially along the feed channel 210 by interacting with the cam 222.

[0041] like Figure 7 As shown, when the cam 222 rotates to the point where its short axis 222.2 is perpendicular to the end face of the rod 234, the brush 235 retracts into the pull-out box 230. Figure 8As shown, when the cam 222 rotates to the point where its long axis 222.1 is perpendicular to the end face of the rod 234, the length of the brush 235 extending into the feed channel 210 reaches its maximum. When the operator repeatedly turns the knob 221 to drive the cam 222 to rotate continuously, the brush 235 reciprocates along the axial direction of the feed channel 210, thereby cleaning the feed channel 210 and the feed inlet 212.

[0042] like Figure 2 As shown, the side wall of the operating chamber 220 is provided with two second through holes 223. The function of these two second through holes 223 is to ensure that the sealing plate 231 or the brush 235 rod 234, which contacts the outer contour of the cam 222, can synchronously and smoothly enter and exit the operating chamber 220 when the pull-out box 230 moves radially along the feeding channel 210. (See also...) Figure 6 and Figure 7 Since the feed channel 210 is connected to the operating chamber 220, when the portion of the sealing plate 231 or the rod 234 within the feed channel 210 is fully retracted into the pull-out box 230 (at this time, the short shaft 222.2 of the cam 222 is perpendicular to the end faces of both), its extended portion within the operating chamber 220 reaches its maximum length. The dimensional design of the two second through holes 223 ensures that, in this state, the portion of the sealing plate 231 or the rod 234 within the operating chamber 220 can smoothly enter and exit, avoiding motion interference.

[0043] According to a preferred embodiment, the gap between the pull-out box 230 and the second through hole 223 can be filled with flexible materials such as rubber or silicone to ensure that the feeding assembly 200 maintains good airtightness when the pull-out box 230 moves radially along the feeding channel 210. Furthermore, the portion of the interface between the feeding channel 210 and the operating chamber 220 that is not blocked by the pull-out box 230 can also be sealed to prevent external air from entering the feeding channel 210 and the storage tank 100 through the operating chamber 220.

[0044] like Figure 2 As shown, the top and bottom of the operating chamber 220 are also provided with two third through holes 224. When the cam 222 rotates to the point where its short shaft 222.2 abuts against the end face of the sealing plate 231 or the rod 234, the end of the long shaft 222.1 of the cam 222 can extend out of the operating chamber 220 through the third through hole 224, providing clearance space for the cam 222 and enabling its continuous rotation.

[0045] like Figure 9As shown, the sealing plate 231 has a first stop 232 and a first elastic element 233 on its side wall. One end of the first elastic element 233 is connected to the first stop 232, and the other end is connected to the inner wall of the pull-out box 230. When the sealing plate 231 completely blocks the feed inlet 212 (i.e., the long axis 222.1 of the cam 222 is perpendicular to the end face of the sealing plate 231), the first elastic element 233 has the maximum compression and stores elastic potential energy. When the cam 222 rotates and the long axis 222.1 deviates from the end face of the sealing plate 231, the first elastic element 233 releases its elastic potential energy. Through the elastic force applied to the first stop 232, it drives the sealing plate 231 to tend to move toward the rotating shaft 226 of the cam 222, and always keeps the end face of the sealing plate 231 abutting against the outer contour of the cam 222. When the cam 222 rotates to the point where the short shaft 222.2 is perpendicular to the end face of the sealing plate 231, the first elastic element 233 is in a naturally extended state. At this time, the first stop block 232 abuts against the inner wall of the other side of the pull-out box 230 (i.e., the inner wall opposite to the side wall connecting the first elastic element 233), restricting the sealing plate 231 from excessively moving into the operating chamber 220. This ensures that when the pull-out box 230 moves radially along the feeding channel 210, the sealing plate 231 can smoothly pass through the second through hole 223 to enter and exit the operating chamber 220.

[0046] like Figure 10 As shown, the brush 235 has a second stop 236 and a second elastic element 237 on its peripheral wall. One end of the second elastic element 237 is connected to the second stop 236, and the other end is connected to the inner wall of the pull-out box 230. The functions of the second stop 236 and the second elastic element 237 are similar to those of the first stop 232 and the first elastic element 233 on the side wall of the sealing plate 231. Their action is on the brush 235's rod 234. The specific functions and working mechanisms will not be elaborated further.

[0047] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection scope. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A wet temporary storage device for brewing waste, comprising a storage tank (100) and a feeding assembly (200), characterized in that: The feeding assembly (200) includes a feeding channel (210) communicating with the storage tank (100), and a feeding hopper (211) is provided on the side wall of the feeding channel (210). The feed channel (210) is provided with a pull-out box (230) that is movably arranged radially thereon. The pull-out box (230) is provided with a sealing plate (231) and a brush (235) that can move axially along the feed channel (210). When the pull-out box (230) moves to the point that the sealing plate (231) is located in the feed channel (210), the sealing plate (231) can be pushed out of the pull-out box (230) to block the feed hopper (211), thereby keeping the storage tank (100) sealed. When the pull-out box (230) moves to the point where the brush (235) is located in the feed channel (210), the brush (235) can be pushed out of the pull-out box (230) and reciprocate along the feed channel (210) axially to clean the feed channel (210).

2. The apparatus according to claim 1, characterized in that, The feeding assembly (200) includes an operating chamber (220) connected to the feeding channel (210), and a rotatable cam (222) is housed inside the operating chamber. The cam (222) drives the sealing plate (231) or the brush (235) to move axially along the feed channel (210) by rotation.

3. The apparatus according to claim 2, characterized in that, The side wall of the operating chamber (220) is provided with a knob (221) and a rotating shaft (226). The knob (221) is fixed to one end of the rotating shaft (226). The rotating shaft (226) passes through the mounting hole (225) of the operating chamber (220) and is connected to the rotation axis of the cam (222).

4. The apparatus according to claim 2, characterized in that, The cam (222) has a structure comprising a long axis (222.1) and a short axis (222.2). When the long axis (222.1) of the cam (222) is perpendicular to the end face of the rod (234) of the sealing plate (231) or the brush (235), the sealing plate (231) is driven to block the feed hopper (211) or the brush (235) from extending into the feed channel (210) for the longest time. When the short shaft (222.2) of the cam (222) is perpendicular to the end face of the rod (234) of the sealing plate (231) or the brush (235), it drives the rod (234) of the sealing plate (231) or the brush (235) to retract into the pull-out box (230).

5. The apparatus according to claim 4, characterized in that, The operating chamber (220) has two second through holes (223) on its side wall; When the rod (234) of the sealing plate (231) or the brush (235) retracts into the pull-out box (230), the portion of it extending into the operating chamber (220) enters and exits through the second through hole (223).

6. The apparatus according to claim 4, characterized in that, The top and bottom surfaces of the operating chamber (220) are provided with a third through hole (224); When the short shaft (222.2) of the cam (222) abuts against the end face of the rod (234) of the sealing plate (231) or the brush (235), the end of the long shaft (222.1) of the cam (222) extends out of the operating chamber (220) through the third through hole (224).

7. The apparatus according to claim 2, characterized in that, The sealing plate (231) has a first stop (232) and a first elastic element (233) on its side wall; One end of the first elastic element (233) is connected to the first stop (232), and the other end is connected to the inner wall of the pull-out box (230), so that the end face of the sealing plate (231) always abuts against the outer contour of the cam (222).

8. The apparatus according to claim 4, characterized in that, The rod (234) has a second stop (236) and a second elastic element (237) on its side wall; One end of the second elastic element (237) is connected to the second stop (236), and the other end is connected to the inner wall of the pull-out box (230), so that the end face of the rod (234) always abuts against the outer contour of the cam (222).

9. The apparatus according to claim 5, characterized in that, The gap between the pull-out box (230) and the second through hole (223) is filled with a flexible sealing material.

10. The apparatus according to claim 1, characterized in that, The storage tank (100) is equipped with a stirrer (110), which is connected to a motor (130) on the top of the tank via a drive shaft.

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