Screen printing screen plate overturning cleaning device

Abstract

The utility model discloses a silk -screen printing screen plate overturning cleaning device relates to silk -screen printing auxiliary equipment technical field, including the cleaning shell, the cleaning shell surface is provided with the turnover mechanism, the cleaning shell inside is provided with the washing mechanism and the scrubbing mechanism, the cleaning shell right side surface is hinged with the material taking door, the cleaning shell inner wall bottom is provided with the water storage pool, the cleaning shell surface is fixed with the liquid discharge valve, the liquid discharge valve is linked with the water storage pool, the cleaning shell surface is fixed with the controller, the both sides surface of the cleaning shell front and back all are set up with the sliding slot. The utility model discloses through overturning, washing, scrubbing, liquid discharge etc.

Description

Technical Field

[0001] This utility model relates to the technical field of screen printing auxiliary equipment, specifically a screen printing stencil flipping and cleaning device. Background Technology

[0002] Screen printing is a traditional printing process that utilizes tools such as a screen and a squeegee. Its principle is that some mesh openings are blocked to form the pattern, while the remaining openings allow ink to pass through. During printing, the squeegee forces the ink through the open mesh onto the substrate, thus accurately replicating the design. This technology is applicable to a wide range of materials, including paper, plastics, textiles, glass, and metals. It is particularly adept at creating thick ink layers and special effects, and is widely used in advertising, clothing printing, electronics manufacturing, and crafts production. After screen printing, the screen needs to be thoroughly cleaned to prevent the ink from drying and clogging the mesh, which would affect subsequent use.

[0003] A search of Chinese patent publication number CN220349334U reveals a screen cleaning device for screen printing.

[0004] This utility model includes a mesh screen cleaning device housing. A first water pipe is fixedly connected to the back of the mesh screen cleaning device housing, and a second water pipe is rotatably connected to the top of the first water pipe. The other end of the second water pipe is connected to a direction adjustment ball, and the other end of the direction adjustment ball is connected to a detergent mixing assembly. A water spray nozzle is installed at the bottom of the detergent mixing assembly. A detergent storage bottle is fixedly connected to the side of the second water pipe, and a detergent dispensing pipe is connected to the bottom of the detergent storage bottle. This utility model facilitates the adjustment of the angle of the water spray nozzle, allowing the water spray nozzle to spray water directly onto the area to be cleaned, improving cleaning efficiency while saving water. It can also mix water and detergent evenly before spraying, improving the cleaning effect and the applicability of the detergent.

[0005] However, this patent also has the following problems: the screen plate in the device is fixed horizontally, and the cleaning roller and water spray are both located above the screen plate, so only one side of the screen plate can be cleaned. The ink from screen printing can penetrate the mesh and form stubborn residues on the back of the screen plate. Cleaning only one side cannot thoroughly clean it, and the screen plate needs to be manually removed and flipped, resulting in low screen plate cleaning efficiency and high manual labor intensity. Utility Model Content

[0006] The purpose of this invention is to provide a screen printing stencil flipping and cleaning device to solve the above-mentioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a screen printing stencil flipping and cleaning device, comprising a cleaning shell, a flipping mechanism provided on the surface of the cleaning shell, a rinsing mechanism and a brushing mechanism provided inside the cleaning shell, a material handling door hinged to the right side surface of the cleaning shell, a water storage tank provided at the bottom of the inner wall of the cleaning shell, a drain valve fixed on the surface of the cleaning shell and connected to the water storage tank, a controller fixed on the surface of the cleaning shell, and sliding grooves provided on both the front and rear surfaces of the cleaning shell.

[0008] In a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, the flipping mechanism includes an electric cylinder, which is fixed to the left side surface of the cleaning shell. The piston rod of the electric cylinder passes through the cleaning shell and is fixed to a square frame. Extension plates are fixed to both the front and rear surfaces of the cleaning shell. A guide rail is fixed to the top of the extension plate. A slider is slidably connected to the surface of the guide rail. An L-shaped support plate is fixed to the top of the slider. The surface of the L-shaped support plate is fixedly connected to the surface of the square frame. The L-shaped support plate is slidably connected to the surface of the slide groove. A drive rod is rotatably connected to the surface of the L-shaped support plate. One end of the drive rod passes through the square frame and is fixed to a square plate for installing the printing stencil. The drive rod is rotatably connected to the surface of the square frame at the point where it passes through. A first motor is fixed to the top of the rear L-shaped support plate. The output shaft of the first motor is fixedly connected to one end of the rear drive rod.

[0009] As a preferred embodiment of the screen printing plate flipping and cleaning device of this utility model, the square profile plate has multiple bolts with handles threaded through its surface.

[0010] In a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, a telescopic hose is fixed on the left side of the inner wall of the cleaning shell, the other end of the telescopic hose is fixedly connected to the surface of the square frame, and the piston rod of the electric cylinder is located inside the telescopic hose.

[0011] In a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, the rinsing mechanism includes a lower diversion shell and an upper diversion shell. The front and rear ends of the lower and upper diversion shells are fixedly connected to the inner wall of the cleaning shell. The opposing surfaces of the lower and upper diversion shells are connected to nozzles. The front surfaces of the lower and upper diversion shells are connected to diversion pipes. The diversion pipes penetrate the cleaning shell, and the surface of the diversion pipes is connected to a liquid injection connection pipe.

[0012] In a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, the brushing mechanism includes a convex plate, a cleaning brush roller is provided below the convex plate, a transmission rod is fixed at both the front and rear ends of the convex plate, the transmission rod passes through the convex plate, the transmission rod is rotatably connected to the surface of the convex plate at the point of penetration, and a driving structure is provided above the convex plate.

[0013] In a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, the driving structure above the convex plate includes a second motor, the second motor is fixed to the front surface of the cleaning shell, the output shaft of the second motor passes through the cleaning shell and is fixed with an extension rod, a first sprocket is fixed to the surface of the extension rod, a second sprocket is arranged below the first sprocket, the second sprocket is fixedly connected to the surface of the front transmission rod, and the first sprocket and the second sprocket are connected by chain drive.

[0014] In a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, the first sprocket, the second sprocket, and the chain used with them are all made of stainless steel.

[0015] As a preferred embodiment of the screen printing stencil flipping and cleaning device of this utility model, the first motor is a servo motor with a brake device at the tail, and the left and right sides of the inner wall of the sliding groove on the surface of the cleaning shell are fixed with bellows covers, one end of the bellows cover is fixedly connected to the surface of the L-shaped support plate.

[0016] In a preferred embodiment of the screen printing plate flipping and cleaning device of this utility model, a transparent baffle plate is fixed on the upper left side of the inner wall of the cleaning shell, and the upper and lower diversion shells are both located below the transparent baffle plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention successfully achieves automated double-sided cleaning of screen printing stencils in a single workstation through an integrated flipping, rinsing, and brushing mechanism. It completely solves the problems of low efficiency, incomplete cleaning, and high labor intensity caused by the need for manual flipping or step-by-step cleaning in traditional devices. Double-sided cleaning ensures that ink residue on both the front and back of the stencil is effectively removed, significantly improving cleaning quality and subsequent printing quality. The excellent protective design extends the service life of key components and reduces maintenance costs. It effectively meets the urgent need for efficient and high-quality stencil cleaning in modern screen printing production. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the flipping mechanism in this utility model; Figure 5 This is a schematic diagram of the rinsing mechanism in this utility model; Figure 6 This is a schematic diagram of the brushing mechanism in this utility model.

[0019] In the diagram: 1. Cleaning shell; 2. Tilting mechanism; 201. Electric cylinder; 202. Square frame; 203. Extension plate; 204. Guide rail; 205. Slider; 206. L-shaped support plate; 207. Drive rod; 208. Square frame; 209. First motor; 210. Bolt with handle; 211. Telescopic hose; 3. Flushing mechanism; 301. Lower diversion shell; 302. Upper diversion shell; 303. Nozzle; 304. Diversion pipe; 305. Liquid injection connection pipe; 4. Brushing mechanism; 401. V-shaped plate; 402. Cleaning brush roller; 403. Transmission rod; 404. Second motor; 405. Extension rod; 406. First sprocket; 407. Second sprocket; 5. Material handling gate; 6. Water storage tank; 7. Drain valve; 8. Controller; 9. Transparent baffle plate; 10. Bellows cover. Detailed Implementation

[0020] Please see Figures 1-6 A screen printing stencil flipping and cleaning device includes a cleaning shell 1, a flipping mechanism 2 on the surface of the cleaning shell 1, a rinsing mechanism 3 and a brushing mechanism 4 inside the cleaning shell 1, a material handling door 5 hinged to the right side surface of the cleaning shell 1, a water storage tank 6 at the bottom of the inner wall of the cleaning shell 1, a drain valve 7 fixed on the surface of the cleaning shell 1 and connected to the water storage tank 6, a controller 8 fixed on the surface of the cleaning shell 1, and sliding grooves on both the front and rear surfaces of the cleaning shell 1.

[0021] The flipping mechanism 2 is responsible for clamping and flipping the screen plate 180 degrees so that both sides of the screen plate can be cleaned. The rinsing mechanism 3 rinses the surface of the screen plate by spraying cleaning liquid or clean water. The brushing mechanism 4 mechanically brushes the surface of the screen plate to remove stubborn stains. The waste liquid after cleaning flows into the water storage tank 6 and is finally discharged through the drain valve 7. The controller 8 coordinates the sequential action of each mechanism to realize the automated cleaning process. The material picking door 5 facilitates the picking and placing of the screen plate, and the chute provides guidance for the movement of the flipping mechanism 2.

[0022] Furthermore, the flipping mechanism 2 includes an electric cylinder 201, which is fixed to the left side surface of the cleaning shell 1. The piston rod of the electric cylinder 201 passes through the cleaning shell 1 and is fixed to a square frame 202. Extension plates 203 are fixed to both the front and rear surfaces of the cleaning shell 1. A guide rail 204 is fixed to the top of the extension plate 203. A slider 205 is slidably connected to the surface of the guide rail 204. An L-shaped support plate 206 is fixed to the top of the slider 205. The surface of the L-shaped support plate 206 is flush with the surface of the square frame 202. The L-shaped support plate 206 is slidably connected to the surface of the slide groove. A drive rod 207 is rotatably connected to the surface of the L-shaped support plate 206. One end of the drive rod 207 passes through the square frame 202 and is fixed to a square plate 208 for installing the printing screen. The drive rod 207 is rotatably connected to the surface of the square frame 202 at the point where it passes through. A first motor 209 is fixed to the top of the rear L-shaped support plate 206. The output shaft of the first motor 209 is fixedly connected to one end of the rear drive rod 207.

[0023] The extension and retraction of the piston rod of the electric cylinder 201 drives the square frame 202, together with the L-shaped support plate 206, to move left and right along the guide rail 204, thereby sending the screen into or out of the cleaning station. When the screen is sent out of the cleaning position, the first motor 209 starts, driving the drive rod 207 to rotate the square frame 208 and its fixed screen by 180 degrees, so that the predetermined surface of the screen can face the brushing mechanism 4 and the rinsing mechanism 3. The slider 205 ensures the smooth and stable movement of the L-shaped support plate 206. This flipping mechanism 2 realizes the precise translation and rotation of the screen in the cleaning station, ensuring the reliability of the cleaning process and the uniformity of the cleaning effect. At the same time, the entire flipping process does not require manual intervention, greatly improving production efficiency.

[0024] Furthermore, the surface of the square-shaped plate 208 is threaded with multiple shank bolts 210.

[0025] By rotating multiple shank bolts 210 so that their ends are screwed toward the center, pressure is applied to the mesh frame placed on the square profile plate 208 and it is firmly pressed and fixed. Since multiple bolts are used, uniform clamping force can be applied at multiple points on the mesh frame to ensure that the mesh does not loosen or shift during subsequent movement, flipping, and high-pressure washing and brushing.

[0026] Furthermore, a telescopic hose 211 is fixed on the left side of the inner wall of the cleaning shell 1, and the other end of the telescopic hose 211 is fixedly connected to the surface of the square frame 202. The piston rod of the electric cylinder 201 is located inside the telescopic hose 211.

[0027] As the piston rod of the electric cylinder 201 extends and retracts and the square frame 202 moves, the telescopic hose 211 also extends or compresses synchronously. It completely encloses the piston rod of the electric cylinder 201 and its parts that may come into contact with the cleaning environment in a relatively sealed space, effectively isolating the cleaning liquid, water mist and possible ink particles and other contaminants that splash around during the cleaning process.

[0028] Furthermore, the rinsing mechanism 3 includes a lower diversion shell 301 and an upper diversion shell 302. Both the front and rear ends of the lower diversion shell 301 and the upper diversion shell 302 are fixedly connected to the inner wall of the cleaning shell 1. The opposite surfaces of the lower diversion shell 301 and the upper diversion shell 302 are connected to nozzles 303. The front surfaces of the lower diversion shell 301 and the upper diversion shell 302 are connected to diversion pipes 304. The diversion pipes 304 penetrate the cleaning shell 1, and the surface of the diversion pipes 304 is connected to a liquid injection connection pipe 305.

[0029] The cleaning fluid is pumped in through the injection connection pipe 305 and delivered to the upper distribution shell 302 and the lower distribution shell 301 through the distribution pipe 304. Then, the cleaning fluid is evenly sprayed out from multiple nozzles 303 installed at the bottom of the upper distribution shell 302 and the top of the lower distribution shell 301 to form a spray area covering the entire surface of the mesh plate. This top-to-bottom spraying method can simultaneously rinse both sides of the mesh plate, or focus on rinsing the side facing the flip position.

[0030] Furthermore, the brushing mechanism 4 includes a truncated plate 401, a cleaning brush roller 402 is provided below the truncated plate 401, a transmission rod 403 is fixed at both the front and rear ends of the truncated plate 401, the transmission rod 403 passes through the truncated plate 401, the transmission rod 403 is rotatably connected to the surface of the truncated plate 401 at the point of penetration, and a driving structure is provided above the truncated plate 401.

[0031] The cleaning brush roller 402 rotates at high speed under the drive structure. The bristles on it generate intense friction with the surface of the screen, thereby physically scraping off and sweeping away the ink and photosensitive adhesive residues that are still stubbornly attached to the surface of the screen and blocked in the mesh after pre-rinsing. The U-shaped plate 401 serves as a support frame, and transmits power to the cleaning brush roller 402 through the transmission rod 403, ensuring its stability in the working position.

[0032] Furthermore, the drive structure above the convex plate 401 includes a second motor 404, which is fixed to the front surface of the cleaning shell 1. The output shaft of the second motor 404 passes through the cleaning shell 1 and is fixed with an extension rod 405. A first sprocket 406 is fixed to the surface of the extension rod 405. A second sprocket 407 is provided below the first sprocket 406. The second sprocket 407 is fixedly connected to the surface of the front transmission rod 403. The first sprocket 406 and the second sprocket 407 are connected by chain drive.

[0033] The second motor 404 starts, and its output shaft drives the extension rod 405 to rotate. The first sprocket 406, which is fixed on the extension rod 405, rotates accordingly. Through the chain drive, the power is transmitted to the second sprocket 407, which is fixed to the front transmission rod 403, thereby driving the transmission rod 403 and the cleaning brush roller 402 to rotate together. The chain drive realizes the effective transmission of motor power from the outside of the device to the internal brush roller.

[0034] Furthermore, the first sprocket 406, the second sprocket 407, and the chain used with them are all made of stainless steel.

[0035] Stainless steel itself has excellent corrosion resistance. When these parts are exposed to the humid moisture generated by the flushing mechanism 3, the cleaning liquid that may overflow, or the environment where they are occasionally splashed directly, a dense passivation film will quickly form on its surface. This film can effectively prevent the metal substrate from undergoing further chemical reaction with the corrosive medium, thereby resisting the occurrence of rust.

[0036] Furthermore, the first motor 209 is a servo motor with a brake device at the tail. Bellows covers 10 are fixed on both sides of the inner wall of the sliding groove on the surface of the cleaning shell 1. One end of the bellows cover 10 is fixedly connected to the surface of the L-shaped support plate 206.

[0037] When the servo motor receives the stop command from the controller 8, its internal brake device will immediately activate, generating mechanical braking force to firmly lock the motor output shaft, thereby precisely fixing the flip angle of the square profile plate 208 and the mesh plate. At the same time, one end of the accordion cover 10 is fixed to the end of the slide, and the other end moves with the L-shaped support plate 206, extending and retracting like an accordion, always covering the opening of the slide and preventing the cleaning fluid from leaking out through the slide.

[0038] Furthermore, a transparent baffle plate 9 is fixed on the upper left side of the inner wall of the cleaning shell 1, and the upper diversion shell 302 and the lower diversion shell 301 are both located below the transparent baffle plate 9.

[0039] When the rinsing mechanism 3 is working, especially when the nozzle 303 sprays upwards, the transparent baffle 9 can effectively block the upward splashing water and cleaning liquid, directing them to the water storage tank 6 below, preventing these liquids from splashing onto the top of the cleaning shell 1 or certain parts that should not come into contact with the liquid. Moreover, due to its transparent material, it does not prevent the operator from observing the cleaning status of the mesh plate from the outside.

[0040] Working principle: The operator opens the material handling door 5 to install and fix the screen to be cleaned onto the square frame 208, and locks it with the bolts 210. After closing the material handling door 5, the automatic cleaning program is started through the controller 8. First, the electric cylinder 201 works, the piston rod retracts, and pushes the square frame 202 and the L-shaped support plate 206 fixed on it along the guide rail 204 to the cleaning station until the screen is in the predetermined position between the rinsing mechanism 3 and the brushing mechanism 4. Then, the rinsing mechanism 3 starts, and the cleaning fluid is pumped into the upper distribution shell 302 and the lower distribution shell 301 through the injection connection pipe 305 and the diversion pipe 304, and is evenly sprayed and rinsed by the upper and lower rows of nozzles 303 on the side of the screen that is initially facing, initially removing the surface ink. After rinsing, the brushing mechanism 4 starts working. The second motor 404 drives the cleaning brush roller 402 to rotate at high speed through the first sprocket 406, the second sprocket 407, and the chain drive, mechanically brushing the wet mesh surface to thoroughly remove stubborn residues from the mesh holes and surface. During this period, the electric cylinder 201 can reciprocate according to the preset program of the controller 8, thereby improving the cleaning effect on the mesh. After the first side is cleaned, the electric cylinder 201 extends to move the mesh out of the cleaning station, and the first motor 209 starts, precisely driving the drive rod 207 and the square plate 208 to rotate the mesh 180 degrees. Then the electric cylinder 201 retracts, and the rinsing mechanism 3 and the brushing mechanism 4 start again according to the preset program to perform the same spray rinsing and mechanical brushing process on the other side of the mesh. Throughout the cleaning process, the telescopic hose 211 protects the piston rod of the electric cylinder 201 from liquid corrosion, the bellows cover 10 protects the slide from contamination, and the transparent baffle 9 effectively inhibits excessive liquid splashing. All waste liquid generated during cleaning flows into the bottom storage tank 6 for temporary storage and is eventually discharged through the drain valve 7. After both sides are cleaned, the piston rod of the electric cylinder 201 extends, sending the clean screen back to the initial loading position, and the operator can then open the unloading door 5 to retrieve the screen. This device coordinates the flipping, rinsing, brushing, and draining actions through the controller 8, achieving automatic, efficient, and thorough double-sided cleaning of the screen.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screen printing stencil flipping and cleaning device, characterized in that: The system includes a cleaning shell (1), a flipping mechanism (2) on the surface of the cleaning shell (1), a rinsing mechanism (3) and a brushing mechanism (4) inside the cleaning shell (1), a material handling door (5) hinged to the right side surface of the cleaning shell (1), a water storage tank (6) at the bottom of the inner wall of the cleaning shell (1), a drain valve (7) fixed on the surface of the cleaning shell (1) and connected to the water storage tank (6), a controller (8) fixed on the surface of the cleaning shell (1), and sliding grooves on both the front and rear surfaces of the cleaning shell (1).

2. The screen printing stencil flipping and cleaning device according to claim 1, characterized in that: The flipping mechanism (2) includes an electric cylinder (201), which is fixed to the left side surface of the cleaning shell (1). The piston rod of the electric cylinder (201) passes through the cleaning shell (1) and is fixed to a square frame (202). Extension plates (203) are fixed to both the front and rear surfaces of the cleaning shell (1). A guide rail (204) is fixed to the top of the extension plate (203). A slider (205) is slidably connected to the surface of the guide rail (204). An L-shaped support plate (206) is fixed to the top of the slider (205). The surface of the L-shaped support plate (206) is connected to the square frame (202). 02) Surface fixed connection, the L-shaped support plate (206) is slidably connected to the surface of the slide groove, the surface of the L-shaped support plate (206) is rotatably connected to a drive rod (207), one end of the drive rod (207) passes through the square frame (202) and is fixed with a square plate (208) for installing the printing screen, the drive rod (207) is rotatably connected to the surface of the square frame (202) at the point of penetration, the top of the rear L-shaped support plate (206) is fixed with a first motor (209), the output shaft of the first motor (209) is fixedly connected to one end of the rear drive rod (207).

3. The screen printing stencil flipping and cleaning device according to claim 2, characterized in that: The square-shaped plate (208) has multiple shank bolts (210) threaded through its surface.

4. The screen printing stencil flipping and cleaning device according to claim 2, characterized in that: A telescopic hose (211) is fixed on the left side of the inner wall of the cleaning shell (1). The other end of the telescopic hose (211) is fixedly connected to the surface of the square frame (202). The piston rod of the electric cylinder (201) is located inside the telescopic hose (211).

5. The screen printing stencil flipping and cleaning device according to claim 1, characterized in that: The rinsing mechanism (3) includes a lower diversion shell (301) and an upper diversion shell (302). The front and rear ends of the lower diversion shell (301) and the upper diversion shell (302) are fixedly connected to the inner wall of the cleaning shell (1). The opposite surfaces of the lower diversion shell (301) and the upper diversion shell (302) are connected to nozzles (303). The front surfaces of the lower diversion shell (301) and the upper diversion shell (302) are connected to diversion pipes (304). The diversion pipes (304) penetrate the cleaning shell (1). The surface of the diversion pipes (304) is connected to an injection connection pipe (305).

6. The screen printing stencil flipping and cleaning device according to claim 1, characterized in that: The brushing mechanism (4) includes a convex plate (401), a cleaning brush roller (402) is provided below the convex plate (401), a transmission rod (403) is fixed at both the front and rear ends of the convex plate (401), the transmission rod (403) passes through the convex plate (401), the transmission rod (403) is rotatably connected to the surface of the convex plate (401) at the point of penetration, and a driving structure is provided above the convex plate (401).

7. The screen printing stencil flipping and cleaning device according to claim 6, characterized in that: The drive structure above the convex plate (401) includes a second motor (404), which is fixed to the front surface of the cleaning shell (1). The output shaft of the second motor (404) passes through the cleaning shell (1) and is fixed with an extension rod (405). A first sprocket (406) is fixed on the surface of the extension rod (405). A second sprocket (407) is provided below the first sprocket (406). The second sprocket (407) is fixedly connected to the surface of the front transmission rod (403). The first sprocket (406) and the second sprocket (407) are connected by chain drive.

8. The screen printing stencil flipping and cleaning device according to claim 7, characterized in that: The first sprocket (406), the second sprocket (407), and the chain used with them are all made of stainless steel.

9. The screen printing stencil flipping and cleaning device according to claim 2, characterized in that: The first motor (209) is a servo motor with a brake device at the tail. The cleaning shell (1) has a bellows cover (10) fixed on both sides of the inner wall of the sliding groove. One end of the bellows cover (10) is fixedly connected to the surface of the L-shaped support plate (206).

10. The screen printing stencil flipping and cleaning device according to claim 5, characterized in that: A transparent baffle plate (9) is fixed on the upper left side of the inner wall of the cleaning shell (1), and the upper diversion shell (302) and the lower diversion shell (301) are both located below the transparent baffle plate (9).

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