A method for solid-liquid separation and quantitative sample preparation

Abstract

A method for solid-liquid separation and shaping and quantitative sampling. The method includes six steps; S1 feeding link: introducing the solid-liquid mixture into the feeding barrel; S2 sampling link: performing solid-liquid separation on the solid-liquid mixture in the feeding barrel, so that the separated basically solid substances are partially or completely stored in a material box of fixed shape; S3 shaping link: shaping the basically solid substances to have a regular shape, fixed volume or weight; S4 moving link: moving the material box to another position; S5 taking link: taking the sample in the material box; S6 cleaning link: cleaning the material box for the next step. There are three stations: filtering, taking, and cleaning; the filtering station realizes S1, S2, and S3; the taking station realizes S4; and the cleaning station realizes S6. It can realize the separation of basically solid substances from the solid-liquid mixture, and the substance can be shaped and quantitatively sampled, and the prepared samples can be conveniently taken.

Description

Technical Field

[0001] The invention discloses a method for solid-liquid separation and shaping and quantitative sample preparation, and in particular relates to a method for solid-liquid separation and shaping and quantitative sample preparation for pre-processing of samples taken at a production site. Background Art

[0002] In industrial and agricultural production, the use of solid-liquid mixtures is extremely common, and the solid materials in the solid-liquid mixtures often need to be tested, detected, analyzed for components or other applications. Most of these applications require solid-liquid separation of the solid-liquid mixture. Many applications also require sampling of the separated solid materials and require the samples to have regular shapes, fixed volumes or weights and to be easily accessible.

[0003] At present, there are many devices and methods for solid-liquid separation in the domestic and even international markets, whether in existing products on the market or in patent documents, published papers, and academic works, but these devices and methods cannot fully meet the aforementioned solid-liquid mixture sample preparation requirements, or in other words, no company, scientific research institution or individual has been found to manufacture or develop products or methods that can complete the aforementioned functions, so they cannot be conveniently used. For example: Patents CN103341280B, CN204034417U, US7344033B2, EP2025383A1, JP5916271B2, and JP2010094611A all disclose a device or method for solid-liquid separation, but these devices and methods either cannot make the separated solid material have a regular shape and a fixed volume or weight, or cannot make the solid material maintain a regular shape when taken. Summary of the invention

[0004] In view of the shortcomings of the current system, the present invention proposes a method for solid-liquid separation and quantitative sample preparation.

[0005] The technical problem to be solved by the present invention is to provide a method for separating a substantially solid substance from a solid-liquid mixture, and for preparing samples of the substance in a fixed shape and quantity, and the prepared samples can be conveniently taken.

[0006] The technical solution adopted by the present invention is: a method for solid-liquid separation and shaping and quantitative sampling, specifically a method for separating a substantially solid substance from a solid-liquid mixture, and shaping and quantitatively preparing the substance, and the prepared sample can be conveniently taken, characterized in that it mainly comprises the following steps:

[0007] S1. Feeding stage: introducing the solid-liquid mixture into the feeding barrel;

[0008] S2. Sample preparation: perform solid-liquid separation on the solid-liquid mixture in the feed barrel, so that part or all of the separated solid substances are present in a material box with a fixed shape;

[0009] S3. Shaping step: shaping the substantially solid material separated in step S2 so that the substantially solid material in the material box has a regular shape, fixed volume or weight;

[0010] S4. Moving stage: moving the material box to another location;

[0011] S5. Retrieving stage: Retrieving the solid substances contained in the material box, such as testing the ingredients or other applications;

[0012] S6. Cleaning: Clean the material box to prepare for the next step;

[0013] There are three types of workstations: filtering workstation, taking workstation, and cleaning workstation. S1, S2, and S3 can be realized in the filtering workstation; S4 can be realized in the taking workstation; and S6 can be realized in the cleaning workstation.

[0014] Each of the above steps can be executed separately, or multiple steps can be executed simultaneously. For example, step S3 can be completed during the execution of step S4, or multiple material boxes can be equipped. When some material boxes execute certain steps, other material boxes can execute other steps at the same time. This can improve the execution efficiency of the method. Repeating steps S1 to S6 can achieve continuous sample preparation.

[0015] The method comprises: one or more filtering stations (P1), one or more taking stations (P2), and one or more cleaning stations (P3 or P4); the steps implemented by each station can be carried out separately or simultaneously. It is recommended that each station carry out the steps implemented by each station simultaneously to improve the overall work efficiency.

[0016] The method comprises: having one or more material boxes (2); having one or more guide rails (1), a transmission belt (15), a transmission wheel (16), a motor (29), and a speed change mechanism (30); having one or more valves, which can be controlled by conventional means such as manual, pneumatic, and electric;

[0017] One or more pulleys (31) movable along the guide rail (1) are mounted on the guide rail (1), and the pulleys (31) are connected to the transmission belt (15).

[0018] The pulley (31) can move or pause along the guide rail (1) under the drag of the transmission belt (15).

[0019] The material box (2) comprises a base, a sealing gasket (3), a filter cloth (12), and a filter cloth support (13), wherein the filter cloth (12) and the filter cloth support (13) may also be composed of separate filter screens or filter plates, such as ceramic filter plates, metal filter plates, or organic filter plates.

[0020] The material box (2) is connected to the pulley (31); the material box (2) can move along the guide rail (1) together with the pulley (31); and the material box (2) can also move in a direction perpendicular to the moving direction of the pulley (31).

[0021] In the filtering station (P1), a feed barrel (4) is provided above the material box (2), and a discharge barrel (21) is provided below the material box (2). The feed barrel (4) is connected to a feed pipe (7), an air intake pipe A (6), a cleaning pipe A (8), an overflow pipe (5), and a discharge pipe A (9). The discharge barrel (21) is connected to an air intake pipe C (23) and a discharge pipe B (22). Each of the above pipes is also connected to a necessary valve. The openings of the feed barrel (4) and the discharge barrel (21) can be sealed after being in close contact with the sealing gasket (3) of the material box (2). The discharge barrel (21) can be moved up and down to push and press the material box (2) and the feed barrel (4). The movement of the discharge barrel (21) can be accomplished by any power device that can accomplish this function, for example, by conventional technologies such as a cylinder or an electric push rod.

[0022] Solid-liquid separation is achieved at the filtering station (P1) so that the solid material (11) in the material box (2) has a regular shape and a fixed volume or weight. The solid-liquid separation is achieved by positive pressure filtration or negative pressure filtration. The solid material has a regular shape and a fixed volume or weight by moving the material box (2) and scraping the surface of the solid material flat by relying on the lower opening edge of the feed barrel (4).

[0023] In the cleaning station (P3 or P4), a cleaning bucket (17) is provided above the material box (2), and a splash-proof bucket (27) and a nozzle (26) are provided below the material box (2). The cleaning bucket (17) is connected to a cleaning pipe B (18) and an air intake pipe B (19), and the nozzle (26) is connected to a cleaning pipe C (25). Each of the above pipes is also connected to a necessary valve. The openings of the cleaning bucket (17) and the splash-proof bucket (27) can be sealed after being in close contact with the sealing gasket of the material box (2). The splash-proof bucket (27) can be moved up and down to push and press the material box (2) and the cleaning bucket (17). Moving the splash-proof bucket (27) can be accomplished by any power device that can accomplish this function, for example, by conventional technologies such as a cylinder or an electric push rod.

[0024] In the description, some nouns are explained as follows:

[0025] Solid-liquid mixture: A mixture containing one or more substantially solid substances and one or more substantially liquid substances;

[0026] Solid-liquid separation: separation of at least a portion of one or more substantially solid components from a solid-liquid mixture;

[0027] Shape and quantity: make the substance have a regular shape and fixed volume or weight;

[0028] Sample preparation: Prepare a substance into a sample in a certain form;

[0029] Workstation: A fixed area where the material box will pause for a period of time at each workstation to wait for the operation to be performed at the workstation to be completed.

[0030] Beneficial effects:

[0031] The method of the present invention can separate a substantially solid substance from a solid-liquid mixture, and can perform shaped and quantitative sample preparation on the substance, that is, the solid material after solid-liquid separation has a regular shape and a fixed volume; and the prepared sample can be conveniently taken. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a working principle diagram.

[0033] Figure 2 is with Figure 1 The corresponding top view.

[0034] In the figure, 1: guide rail; 2: material box; 3: sealing pad; 4: feed barrel; 5: overflow pipe; 6: air inlet pipe A; 7: feed pipe; 8: cleaning pipe A; 9: discharge pipe A; 10: solid-liquid mixture; 11: solid material; 12: filter cloth; 13: filter cloth support; 14: moving pair; 15: transmission belt; 16: transmission wheel; 17: cleaning barrel; 18: cleaning pipe B; 19: air inlet pipe B; 20: cleaning liquid; 21: discharge barrel; 22: discharge pipe B; 23: air inlet pipe C; 24: waste material; 25: cleaning pipe C; 26: nozzle; 27: splash-proof barrel; 28: coupling; 29: motor; 30: speed change mechanism; 31: pulley; P1: filtering station; P2: taking station; P3: cleaning station A; P4: cleaning station B. DETAILED DESCRIPTION

[0035] To further illustrate the content, principle and working process of the present invention, the following is a Figure 1 , Attachment Figure 2 The present invention is further described, but they are not intended to limit the protection scope of the present invention.

[0036] In order to facilitate the explanation of the core working principle of the method, some components are simplified in the figure, and the illustrations of some minor components or components known in related professional and technical fields are omitted. The four stations of the system are marked in the figure, namely P1: filtering station; P2: taking station; P3: cleaning station A; P4: cleaning station B.

[0037] The present invention provides a method for solid-liquid separation and sample preparation by shaping and quantification, which mainly comprises the following steps:

[0038] S1. Feeding stage: introducing the solid-liquid mixture into the feeding barrel;

[0039] S2. Sample preparation: perform solid-liquid separation on the solid-liquid mixture in the feed barrel, so that part or all of the separated solid substances are present in a material box with a fixed shape;

[0040] S3. Shaping step: shaping the substantially solid material separated in step S2 so that the substantially solid material in the material box has a regular shape, fixed volume or weight;

[0041] S4. Moving stage: moving the material box to another location;

[0042] S5. Retrieving stage: Retrieving the solid substances contained in the material box, such as testing the ingredients or other applications;

[0043] S6. Cleaning: Clean the material box to prepare for the next step;

[0044] Each of the above steps can be executed separately, or multiple steps can be executed simultaneously. For example, step S3 can be completed during the execution of step S4, or multiple material boxes can be equipped. When some material boxes execute certain steps, other material boxes can execute other steps at the same time. This can improve the execution efficiency of the method. Repeating steps S1 to S6 can achieve continuous sample preparation.

[0045] like Figure 1 and Figure 2 As shown, the example has a filtering station (P1), a taking station (P2), and two cleaning stations, namely cleaning station A (P3) and cleaning station B (P4). The material box (2) will stay in each station for a necessary time to wait for the operation to be performed at the station to be completed. The links implemented by each station are carried out simultaneously or separately.

[0046] In conjunction with this specific example, the implementation process of this method mainly includes the following steps:

[0047] S1. Feeding: At the filtering station (P1), the solid-liquid mixture (10) enters the feed barrel (4) above the material box (2) by gravity or pumping, and the material exceeding the volume of the feed barrel (4) is discharged from the overflow pipe (5);

[0048] S2, sample preparation, including solid-liquid separation and drainage:

[0049] Solid-liquid separation: at the filtering station (P1), using the principle of positive pressure filtration or negative pressure filtration, the material in the feed barrel (4) is filtered by the filter cloth (12) arranged in the material box (2) to achieve solid-liquid separation, the solid remains in the material box (2), and the liquid enters the discharge barrel (21) below the material box;

[0050] Draining: at the filtering station (P1), firstly, most of the excess solid-liquid mixture (10) located above the solid material (11) in the feed barrel (4) is discharged through the discharge pipe (9) by means of positive pressure, and then step S2 is repeated until the solid-liquid mixture (10) is completely drained;

[0051] S3, shaping step: the material box moves, and the power system drags all the material boxes (2) to move forward along the guide rail (1) at the same time. In the process of the material box moving from the filtering station (P1) to the taking station (P2), the material exceeding the upper surface of the material box (2) will be scraped flat by the lower edge of the feed barrel (4), so that the solid material (11) in the material box (2) removed from the filtering station (P1) has a fixed volume and shape, thereby achieving the purpose of quantitative and fixed-shape sample preparation;

[0052] S4, moving stage: the power system drags all the material boxes (2) to move forward along the guide rail (1) at the same time, the material box at the filtering station (P1) is moved to the taking station (P2), and at the same time, the material box (2) at the taking station (P2) is moved to the cleaning station A (P3), and the material box (2) at the cleaning station A (P3) is moved to the cleaning station B (P4), and the cycle repeats, and so on;

[0053] S5, Retrieving stage: The material box moved to the retrieval station (P2) contains samples with consistent volume, shape and constant compactness, which can be retrieved for application based on certain purposes. The purpose of retrieval can be achieved manually or with the help of tools and robotic arms;

[0054] S6, cleaning step: the material box (2) is cleaned at the cleaning station A (P3) and the cleaning station B (P4) so ​​that the material box (2) can be used again at the filtering station (P1);

[0055] The specific implementation method is:

[0056] The example has 4 material boxes (2), 2 guide rails (1), 2 transmission belts (15), 8 transmission wheels (16), 1 coupling (28), 1 motor (29), 1 speed change mechanism (30), 8 pulleys (31), and other necessary power and transmission devices, and also has a plurality of valves for controlling the inflow and outflow of liquids and gases (because controlling the flow or termination of liquids or gases by valves is a well-known technology in the industry, they are not drawn in the figure of this example).

[0057] Four pulleys (31) are mounted on each guide rail (1) and are movable along the guide rail (1), and each pulley (31) is connected to a corresponding transmission belt (15).

[0058] Each transmission belt (15) is connected to four transmission wheels (16), one of the transmission wheels (16) is connected to the transmission wheel (16) at a corresponding position on another transmission belt (15) through a coupling (28), and at the same time, one of the two transmission wheels connected to the coupling (28) is connected to a speed change mechanism (30), and the speed change mechanism (30) is connected to a motor (29).

[0059] Each pulley (31) can move or pause along the guide rail (1) under the drag of the transmission belt (15).

[0060] Each material box (2) comprises a base body, a sealing pad (3), a filter cloth (12), and a filter cloth support (13).

[0061] Each material box (2) is connected to two pulleys (31) via a connecting rod and a moving pair (14). The two pulleys (31) connected to the same material box (2) move synchronously along the guide rail (1), thereby driving the material box (2) to move together. The function of the moving pair (14) is to enable the material box (2) to move in a direction perpendicular to the moving direction of the pulley (31) in addition to moving along the guide rail (1).

[0062] The four material boxes (2) have the same spacing between each other to ensure that the four material boxes (2) can arrive at the workstations P1, P2, P3, and P4 synchronously, so that the material boxes (2) at the four workstations can work simultaneously without affecting each other, thus improving the operating efficiency of the entire system.

[0063] In the filtering station P1, a feed barrel (4) is provided above the material box 2, and a discharge barrel (21) is provided below the material box (2). The feed barrel (4) is connected with a feed pipe (7), an air intake pipe A (6), a cleaning pipe (8), an overflow pipe (5), and a discharge pipe A (9). The discharge barrel (21) is connected with an air intake pipe C (23) and a discharge pipe B (22). Each of the above pipes is also connected with necessary valves (because it is a well-known technology in the industry to control the flow or termination of liquid or gas through valves, it is not described in detail in this example). The openings of the feed barrel (4) and the discharge barrel (21) can be sealed after being in close contact with the sealing gasket (3) of the material box (2). The feed barrel (4) is fixed, and the discharge barrel (21) can move up and down to push and press the material box (2) and the feed barrel (4). The movement of the discharge barrel (21) can be completed by any power device that can complete this function, for example, a cylinder lifting device can be used.

[0064] At the filtering station P1, when the material box (2) is moved into position, the transmission belt (15) is stopped, and the discharge barrel (21) is moved upward by using a lifting device to press the material box (2) and the feed barrel (4) to achieve sealing. Then, the feed pipe (7), the air intake pipe A (6), the overflow pipe (5), the discharge pipe A (9), and the air intake pipe C (23) are closed, and the cleaning pipe A (8) and the discharge pipe B (22) are opened. The cleaning liquid enters the feed barrel (4) through the cleaning pipe A (8), passes through the filter cloth (12) and the discharge barrel (21), and is discharged from the discharge pipe B (22), thereby achieving the cleaning of the discharge barrel. After a period of time, the cleaning pipe A (8) is closed and the air inlet pipe A (6) is opened. The cleaning liquid and waste material (24) remaining in the feed barrel (4), the discharge barrel (21) and the discharge pipe B (22) are discharged from the discharge pipe B (22) by using the gas pressure. At the same time, the gas pressure can also prevent the discharge barrel (21) and the discharge pipe B (22) from being blocked. After a period of time, the cleaning process before feeding is completed. Thereafter, the overflow pipe (5), the feed pipe (7) and the discharge pipe A (9) are opened to feed the solid-liquid mixture ( 10) enters the feed barrel (4) through the feed pipe (7), wherein the overflow pipe (5) is used to discharge the excess solid-liquid mixture that exceeds the volume of the feed barrel (4). After a period of time, the feeding is completed, the feed pipe (7), the overflow pipe (5), and the discharge pipe A (9) are closed, and the air inlet pipe A (6) is opened to start filtering the solid-liquid mixture in the feed barrel (4). After a period of time, part or all of the liquid is pressed out of the feed barrel (4), and part or all of the solid material (11) is deposited at the bottom of the feed barrel (4) and in the material box (2). The air inlet pipe A (6) is closed and opened. The discharge pipe A (9) is opened. The discharge inlet of the discharge pipe A (9) is located near the upper surface of the material box (2). The residual air pressure in the feed barrel (4) will discharge the excess solid-liquid mixture above the upper surface of the material box (2) from the discharge pipe A (9). After a period of time, the discharge pipe A (9) is closed and the air inlet pipe A (6) is opened. The remaining solid-liquid mixture in the feed barrel (4) that has not been completely discharged by the discharge pipe A (9) is further subjected to pressure filtration. After a period of time, it is ensured that all the solid-liquid mixture in the feed barrel 4 has completed solid-liquid separation. At this point, the work of the material box at the filtration station is completed.

[0065] In the filtering station P1, the air inlet pipe C (23) is a component added for some solid-liquid mixtures that are more likely to cause the filter cloth mesh to be blocked. Its function is to temporarily close the air inlet pipe A (6) when the filter cloth mesh is seriously blocked during the filter pressing process, open the overflow pipe (5) and the air inlet pipe C (23), and backflush the filter cloth in the reverse direction, and then repeat the filter pressing process. The above backflush and filter pressing process can be repeated multiple times to achieve the purpose of improving the filter pressing efficiency.

[0066] When the current work of all four workstations is completed, the motor (29) is started, and the motor (29) transmits power to the material box (2) through the speed change mechanism (30), the coupling (28), the transmission belt (15), the pulley (31), and the moving pair (14), so that the material box (2) located at the workstation P1 is moved to the workstation P2. At the same time, the material box (2) previously located at the workstation P2 will be moved to the workstation P3, and so on.

[0067] During the process of the material box (2) moving from the work station P1 to the work station P2, the excess solid material located above the upper surface of the material box (2) will be scraped away by the lower opening edge of the feed barrel (4) and then fall into the discharge barrel 21, so that the solid material remaining in the material box 2 has a regular shape and a fixed volume.

[0068] At the retrieval station P2, the material box (2) waits for the sample therein to be retrieved.

[0069] In the cleaning stations P3 and P4, a cleaning bucket (17) is provided above the material box 2, and a splash-proof bucket (27) and a nozzle (26) are provided below the material box (2). The cleaning bucket (17) is connected to a cleaning pipe B (18) and an air inlet pipe B (19), and the nozzle (26) is connected to a cleaning pipe C (25). Each of the above-mentioned pipes is also connected to a necessary valve. The openings of the cleaning bucket (17) and the splash-proof bucket (27) can be sealed after being in close contact with the sealing gasket (3) of the material box (2). The cleaning bucket (17) is fixed, and the splash-proof bucket (27) can be moved up and down to push and compress the material box (2) and the cleaning bucket (17). The movement of the splash-proof bucket (27) can be completed by any power device that can complete this function, for example, a cylinder lifting device can be used.

[0070] At the cleaning stations P3 and P4, after the material box (2) is moved into position, the transmission belt (15) is stopped, and the splash-proof barrel (27) is moved upward by means of a lifting device to press the material box (2) and the cleaning barrel (17) to achieve sealing. Then, the cleaning pipe B (18) is closed, the air inlet pipe B (19) and the cleaning pipe C (25) are opened, and gas is sprayed onto the filter cloth (12) from above. The nozzle (26) sprays the cleaning liquid that enters through the cleaning pipe C (25) to spray the surface of the filter cloth (12) from below. After a period of time, the air inlet pipe B (19) is closed, the cleaning pipe B (18) is opened, and the cleaning liquid (20) enters the cleaning barrel (17) through the cleaning pipe B (18). After a period of time, the cleaning pipe B (18) is closed, the air inlet pipe B (19) is opened, and the filter cloth is pressure-washed using the cleaning liquid that has not been completely discharged from the cleaning barrel (17). After a period of time, the cleaning liquid in the cleaning barrel (17) is completely discharged. At this point, the work of the material box at the cleaning station is completed.

[0071] The purpose of arranging two cleaning stations P3 and P4 instead of only one cleaning station is that the cleaning processes of the two cleaning stations can be flexibly adjusted. The two cleaning stations can perform the same cleaning process or different cleaning processes. For example, only the gas blowing process can be performed at the cleaning station P3 and the pressure washing process can be performed at the cleaning station P4.

Claims

1. A method for solid-liquid separation and sample preparation by shaping and quantitative determination, characterized in that: The steps include: S1, feeding step: introducing the solid-liquid mixture (10) into the feeding barrel (4); S2, sample preparation step: performing solid-liquid separation on the solid-liquid mixture (10) in the feed barrel (4), so that part or all of the separated substantially solid substances are present in a material box (2) having a fixed shape; S3, shaping step: shaping the substantially solid material separated in step S2 so that the substantially solid material in the material box (2) has a regular shape and a fixed volume or weight; the method for achieving the regular shape and the fixed volume or weight of the solid material is to move the material box (2) and scrape the surface of the solid material flat by relying on the lower opening edge of the feed barrel (4); S4, moving step: moving the material box (2) to another position; S5, taking step: taking the substantially solid substance contained in the material box (2); S6, cleaning step: cleaning the material box (2) to prepare for the next step of use; There are three types of workstations: filtering workstation (P1), taking workstation (P2) and cleaning workstation (P3 or P4). S1, S2 or S3 can be realized at filtering workstation (P1); S4 can be realized at taking workstation (P2); S6 can be realized at cleaning workstation (P3 or P4). Each of the above steps can be performed individually, or multiple steps can be performed simultaneously.

2. The method for solid-liquid separation and sample preparation according to claim 1, characterized in that: The method comprises: one or more filtering stations (P1), one or more taking stations (P2), and one or more cleaning stations (P3 or P4); the steps implemented by each station are carried out simultaneously or individually.

3. The method for solid-liquid separation and sample preparation according to claim 1, characterized in that: In the filtering station (P1), a feed barrel (4) is provided above the material box (2), and a discharge barrel (21) is provided below the material box (2); the feed barrel (4) is connected with a feed pipe (7), an air intake pipe A (6), a cleaning pipe A (8), an overflow pipe (5), and a discharge pipe A (9); the discharge barrel (21) is connected with an air intake pipe C (23) and a discharge pipe B (22); the openings of the feed barrel (4) and the discharge barrel (21) can be sealed after being in close contact with the sealing gasket (3) of the material box (2); the discharge barrel (21) can be moved up and down to push and press the material box (2) and the feed barrel (4); the movement of the discharge barrel (21) can be accomplished by any power device that can accomplish this function.

4. The method for solid-liquid separation and sample preparation according to claim 1, characterized in that: Solid-liquid separation is achieved at the filtering station (P1) and the solid material (11) in the material box (2) has a regular shape and a fixed volume or weight. The solid-liquid separation is achieved by positive pressure filtration or negative pressure filtration.

5. The method for solid-liquid separation and sample preparation according to claim 1, characterized in that: In the cleaning station (P3 or P4), a cleaning bucket (17) is provided above the material box (2), and a splash-proof bucket (27) and a nozzle (26) are provided below the material box (2); the cleaning bucket (17) is connected to a cleaning pipe B (18) and an air inlet pipe B (19); the nozzle (26) is connected to a cleaning pipe C (25); the openings of the cleaning bucket (17) and the splash-proof bucket (27) are in close contact with the sealing gasket of the material box (2) to achieve sealing; the splash-proof bucket (27) can be moved up and down to push and press the material box (2) and the cleaning bucket (17); and the movement of the splash-proof bucket (27) can be accomplished by any power device that can accomplish this function.

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