A printing apparatus wastewater purification treatment device

Abstract

The application discloses a printing equipment wastewater purification treatment device and belongs to the technical field of sewage treatment. The printing equipment wastewater purification treatment device comprises an outer cylinder body, an inner cylinder body is fixedly installed on the inner side of the outer cylinder body, a primary filter screen is fixedly installed on the upper inner side of the outer cylinder body, a blowdown pipe and a discharge pipe are connected to the lower end of the outer cylinder body, a rotating ring seat is rotatably installed on the upper end inner side of the inner cylinder body, a driving assembly for driving the rotating ring seat to rotate is installed on the outer cylinder body, a lifting ring seat is liftingly installed on the lower end inner side of the inner cylinder body, a flexible cylinder part is fixedly connected between the rotating ring seat and the lifting ring seat, the flexible cylinder part is driven to twist in the rotating process of the rotating ring seat, and a purification filter plate is arranged on the lifting ring seat. The printing equipment wastewater purification treatment device can realize sufficient mixing of wastewater and medicaments, and can further filter out flocculation through extrusion force, thereby effectively improving the purification treatment efficiency of printing wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater purification and treatment device for printing equipment. Background Technology

[0002] In the printing industry, the operation of printing equipment generates a large amount of wastewater, mainly from dampening solutions and washing water in offset printing, and solvent-based ink waste liquid in gravure printing. If such wastewater is discharged directly without effective purification treatment, it will cause serious harm to the ecological environment: high-chroma wastewater will reduce the light transmittance of receiving water bodies and affect the photosynthesis of aquatic organisms. Therefore, efficient, stable and economical purification treatment of printing equipment wastewater is an inevitable requirement for the printing industry to achieve green production and meet environmental protection requirements.

[0003] Prior art (Chinese Patent Publication No. CN118420155A, Publication Date: 2024-08-02) discloses a wastewater recycling treatment device for printing plate making production, including a pretreatment tank and a posttreatment tank. The pretreatment tank and the posttreatment tank are connected by multiple connecting pipes. The pretreatment tank includes: a tank body, with a wastewater tank inside, and an inlet pipe and a chemical inlet pipe installed on the side of the tank body; each connecting pipe includes: a pipe body, with both ends connected to the wastewater tank and the posttreatment tank respectively, and a pump assembly installed on the upper side of the pipe body; a separation group. The device, installed inside the pipe body, separates the grease or ink at the top when the initial wastewater passes through. When treating printing wastewater, it pre-treats the wastewater through a pre-treatment tank, flocculates the wastewater with a flocculant, and separates the grease or ink in the printing wastewater by letting it settle. Then, the settled printing wastewater is transferred to a post-treatment tank through various connecting pipes. The prior art (Chinese patent publication number: CN119735335A, publication date: 2025-04-01) discloses a sedimentation separation device for printing wastewater. This invention includes: a sedimentation tank, a pretreatment mechanism mounted on top of the sedimentation tank, wherein the pretreatment mechanism mixes wastewater with an acidic regulator to generate bubbles in the wastewater, causing lighter impurities to float and be adsorbed, and then filters and discharges the wastewater into the sedimentation tank; and a heating and sterilization mechanism mounted on one side of the sedimentation tank, wherein the heating and sterilization mechanism sterilizes the treated water by heating it at high temperature and simultaneously slows down the discharge rate to cool the water before discharge. Wastewater with a sedimentation tank and a protective tank enters the sedimentation tank and mixes with flocculant by rotating a second rotating shaft for sedimentation. At the same time, a magnetic suction rod is installed on the second rotating shaft to adsorb metal powder impurities in the wastewater. After complete sedimentation, the wastewater is discharged to a connecting pipe by a pump.

[0004] While existing wastewater purification devices for printing equipment can achieve flocculation and filtration of wastewater, the discharge of flocs relies solely on the gravity of the water, resulting in low filtration pressure, easy clogging of the equipment's filtration mechanism, and low filtration efficiency, thus exhibiting certain shortcomings in use. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater purification and treatment device for printing equipment, in order to solve the problems mentioned in the background art. Although the current wastewater purification and treatment devices for printing equipment on the market can achieve flocculation and filtration of wastewater, during the flocculation filtration process, they rely solely on the gravity of water for discharge, resulting in low filtration pressure, easy clogging of the equipment filtration mechanism, and low filtration efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater purification treatment device for printing equipment, comprising an outer cylinder, an inner cylinder fixedly installed on the inner side of the outer cylinder, a primary filter screen fixedly installed on the upper inner side of the outer cylinder, and a drain pipe and a discharge pipe connected to the lower end of the outer cylinder. A rotating ring seat is rotatably installed on the upper inner side of the inner cylinder, and a driving component for driving the rotating ring seat to rotate is installed on the outer cylinder. A lifting ring seat is lifted and lowered on the lower inner side of the inner cylinder, and a flexible cylinder is fixedly connected between the rotating ring seat and the lifting ring seat. During the rotation of the rotating ring seat, the flexible cylinder is driven to twist. At the same time, a purification filter plate is mounted on the lifting ring seat. An external filter screen is fixedly connected between the outer cylinder and the inner cylinder, and a sealing door for cleaning impurities is provided on the back of the outer cylinder. A liquid conveying component for conveying wastewater is connected to the inner cylinder and the flexible cylinder. A lifting component for controlling the lifting and lowering adjustment of the purification filter plate is also provided on the outer cylinder.

[0007] Preferably, the primary filter is arranged in a conical structure, and the outer diameter of the lower end of the primary filter is larger than the outer diameter of the inner cylinder, and the primary filter performs preliminary filtration of the injected printing wastewater.

[0008] Preferably, the drive assembly includes a first motor fixedly installed on the outside of the outer cylinder, and a transmission gear is fixedly installed on the output end of the first motor. A gear ring is fixedly installed on the outside of the rotating ring seat through the frame. The transmission gear and the gear ring are meshed and connected. A protective guide plate for blocking wastewater is provided above the gear ring.

[0009] Preferably, the rotating ring seat, the lifting ring seat, and the flexible cylinder are coaxially arranged, and the outer diameter of the flexible cylinder is smaller than the inner diameter of the inner cylinder. Furthermore, the inner cylinder and the lifting ring seat have a sealed sliding structure. During the rotation of the rotating ring seat, the lifting ring seat is adjusted by twisting the flexible cylinder to pull it up and down.

[0010] Preferably, the lifting ring seat and the purification filter plate are sealed and fitted together, the inner diameter of the lifting ring seat is smaller than the outer diameter of the purification filter plate, and the outer wall of the purification filter plate is sealed and fitted to the lower inner wall of the flexible cylinder. During the lifting and lowering process, the lifting ring seat drives the purification filter plate to lift and lower synchronously, and the purification filter plate is uniformly provided with a filter membrane structure.

[0011] Preferably, the inner cylinder, rotating ring seat, lifting ring seat, and flexible cylinder form a sealed structure, and the volume between the flexible cylinder and the inner cylinder increases during the torsion process. The infusion assembly includes a suction pipe fixedly connected to the inner cylinder, with the lower end of the suction pipe located between the outer cylinder and the inner cylinder. An injection pipe is fixedly connected through the flexible cylinder, with the lower end of the injection pipe located between the inner cylinder and the flexible cylinder. One-way valves are provided on the suction pipe and the injection pipe. During the torsion process of the flexible cylinder, the suction pipe draws in wastewater between the outer cylinder and the inner cylinder. When the flexible cylinder resets, the wastewater drawn in by the suction pipe is injected into the inner side of the flexible cylinder through the injection pipe. During the torsion process of the flexible cylinder, the wastewater level inside rises.

[0012] Preferably, the upper ends of the inner cylinder and the rotating ring seat are provided with chamfered structures, and the chamfered structures at the upper ends of the inner cylinder and the rotating ring seat guide the overflowing oil, and the external filter screen performs secondary filtration of the wastewater flowing into the space between the outer cylinder and the inner cylinder.

[0013] Preferably, the lifting assembly includes a second motor fixedly installed on the upper end of the outer cylinder, and a threaded rod is fixedly installed on the output end of the second motor. The lower end of the threaded rod is threadedly connected to a bracket. At the same time, a guide rod that slides through the bracket is vertically fixedly installed on the lower end of the outer cylinder. A sealing elastic sleeve for protecting the threaded rod is fixedly connected between the purification filter plate and the primary filter screen. The bracket is attached to the lower part of the purification filter plate, and the outer diameter of the bracket is larger than the inner diameter of the purification filter plate. During the upward movement of the bracket, the purification filter plate is lifted and moved upward synchronously.

[0014] Preferably, a fixed cylinder is fixedly installed at the lower end of the primary filter, and a lifting sleeve is sleeved below the fixed cylinder. The primary filter and the lifting sleeve are connected by a spring to form an elastic lifting structure. During the upward movement of the purification filter plate, the lifting sleeve is pushed upward. A ball bearing is embedded in the lower inner wall of the fixed cylinder, and a spiral guide groove is opened on the outer side of the lifting sleeve. The ball bearing and the guide groove are slidably connected. At the same time, scrapers are evenly arranged on the outer side of the lifting sleeve. The lifting sleeve rotates synchronously during the lifting process, and the scrapers clean the filtered material on the purification filter plate during the rotation of the lifting sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the wastewater purification treatment device for printing equipment can achieve full mixing of wastewater and reagents, and the subsequent full filtration and cleaning of flocculants can be assisted by extrusion pressure, which effectively improves the purification treatment efficiency of printing wastewater. The specific details are as follows; 1. Equipped with a pre-filter and a flexible cylinder, the pre-filter can initially filter particulate impurities in the wastewater. Subsequently, by starting the first motor, the rotating ring seat can be rotated, which in turn causes the flexible cylinder to twist, thereby raising the liquid level inside the flexible cylinder. When the liquid level is higher than the top of the rotating ring seat, the oil on the top of the wastewater will flow out, achieving preliminary filtration and purification, reducing the difficulty of subsequent treatment and purification, and improving the overall filtration and purification effect of the equipment. 2. Equipped with a flexible cylinder, a drain pipe, and a discharge pipe, the rotating ring seat, in conjunction with the lifting ring seat, twists the flexible cylinder, causing a change in the volume inside. Simultaneously, the lifting ring seat and the lifting action of the filter plate accelerate the flow of waste liquid, promoting the mixing reaction of waste liquid and flocculant. During the twisting and recovery process of the flexible cylinder, the drain pipe draws in waste liquid that has undergone secondary filtration between the outer and inner cylinders and injects it into the inner side of the flexible cylinder through the discharge pipe. This helps maintain the liquid level and further accelerates the flow and mixing of the waste liquid inside, improving the subsequent reaction and purification efficiency. After the reaction is complete, controlling the rotating ring seat to rotate again causes the flexible cylinder to twist again. As the central aperture of the flexible cylinder gradually decreases, the hydraulic pressure on the lower inner side of the flexible cylinder increases, thereby promoting the filtration of the treated waste liquid and effectively ensuring the filtration effect and efficiency of the filter plate.

[0016] 3. It is equipped with a purification filter plate, a fixed cylinder and a lifting sleeve. After the purification filter plate finishes filtering, the second motor drives the bracket to push the purification filter plate to move up. When the purification filter plate moves to the upper position of the rotating ring seat, it will contact the lifting sleeve, which will then push the lifting sleeve to move up synchronously, so that the lifting sleeve rotates. At this time, the scraper on the outside of the lifting sleeve can scrape off the flocculent material filtered out of the purification filter plate and push it into the space between the outer cylinder and the inner cylinder for subsequent centralized treatment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic cross-sectional view of the outer cylinder structure of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 4 This is a top view schematic diagram of the lifting ring seat and purification filter plate of the present invention; Figure 5 This is a schematic diagram of the installation structure of the primary filter and the rotating ring seat of the present invention; Figure 6 This is a schematic diagram of the purification filter plate installation structure of the present invention; Figure 7 This is a cross-sectional view of the fixed cylinder and lifting sleeve of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic diagram of the connection structure between the lifting sleeve and the scraper of the present invention.

[0018] In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Primary filter; 4. First motor; 5. Transmission gear; 6. Rotating ring seat; 7. Gear ring; 8. Lifting ring seat; 9. Flexible cylinder; 10. Purification filter plate; 1001. Sealing elastic sleeve; 11. External filter; 12. Suction pipe; 13. Injection pipe; 14. Sewage pipe; 15. Discharge pipe; 16. Second motor; 17. Threaded rod; 18. Bracket; 19. Guide rod; 20. Fixed cylinder; 21. Ball bearing; 22. Lifting sleeve; 23. Guide groove; 24. Scraper. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Existing wastewater purification devices for printing equipment are inconvenient for fully mixing and reacting the reagents. Furthermore, during the filtration of flocculants, discharge relies solely on gravity, resulting in low filtration pressure and easy clogging of the filtration mechanism. To address this technical problem, this example discloses the following technical details. Please refer to [link / reference]. Figures 1-6 As shown; A wastewater purification device for printing equipment includes an outer cylinder 1, an inner cylinder 2 fixedly installed on the inner side of the outer cylinder 1, a primary filter screen 3 fixedly installed on the upper inner side of the outer cylinder 1, and a drain pipe 14 and a discharge pipe 15 connected to the lower end of the outer cylinder 1. A rotating ring seat 6 is rotatably installed on the upper inner side of the inner cylinder 2, and a drive assembly for driving the rotating ring seat 6 to rotate is installed on the outer cylinder 1. A lifting ring seat 8 is lifted and lowered on the lower inner side of the inner cylinder 2, and a flexible cylinder 9 is fixedly connected between the rotating ring seat 6 and the lifting ring seat 8. The flexible cylinder 9 can be made of corrosion-resistant composite rubber material, and the rotating ring seat 6 drives the flexible cylinder 9 to twist during rotation. At the same time, a purification filter plate 10 is mounted on the lifting ring seat 8. An external filter screen 11 is fixedly connected between the outer cylinder 1 and the inner cylinder 2, and a sealing door for cleaning impurities is provided on the back of the outer cylinder 1. A liquid conveying assembly for conveying wastewater is connected to the inner cylinder 2 and the flexible cylinder 9.

[0021] The primary filter 3 has a conical structure, and the outer diameter of the lower end of the primary filter 3 is larger than the outer diameter of the inner cylinder 2. The primary filter 3 performs preliminary filtration of the injected printing wastewater. The driving assembly includes a first motor 4 fixedly installed on the outside of the outer cylinder 1, and a transmission gear 5 fixedly installed on the output end of the first motor 4. A gear ring 7 is fixedly installed on the outside of the rotating ring seat 6 through the frame. The transmission gear 5 and the gear ring 7 are meshed and connected. A protective guide plate for blocking wastewater is provided above the gear ring 7. The rotating ring seat 6, the lifting ring seat 8, and the flexible... The flexible cylinder 9 is coaxially arranged, and its outer diameter is smaller than that of the inner cylinder 2. The inner cylinder 2 and the lifting ring seat 8 have a sealed sliding structure. During rotation, the rotating ring seat 6 pulls the lifting ring seat 8 up and down by twisting the flexible cylinder 9. The lifting ring seat 8 and the purification filter plate 10 are sealed together. The inner diameter of the lifting ring seat 8 is smaller than that of the purification filter plate 10, and the outer wall of the purification filter plate 10 is sealed to the lower inner wall of the flexible cylinder 9. During the lifting process, the lifting ring seat 8 drives the purification filter plate 10 to rise and fall synchronously. The upper part is uniformly equipped with a filter membrane structure. The inner cylinder 2, rotating ring seat 6, lifting ring seat 8, and flexible cylinder 9 form a sealed structure. During the torsion of the flexible cylinder 9, the volume between it and the inner cylinder 2 increases. The infusion assembly includes a suction tube 12 fixedly connected to the inner cylinder 2, with the lower end of the suction tube 12 located between the outer cylinder 1 and the inner cylinder 2. An injection tube 13 is fixedly connected through the flexible cylinder 9, with the lower end of the injection tube 13 located between the inner cylinder 2 and the flexible cylinder 9. The suction tube 12 and the injection tube 13 are equipped with single... The valve is used to draw in wastewater between the outer cylinder 1 and the inner cylinder 2 during the torsion process of the flexible cylinder 9. When the flexible cylinder 9 is reset, the wastewater drawn in by the suction pipe 12 is injected into the inner side of the flexible cylinder 9 through the injection pipe 13. During the torsion process of the flexible cylinder 9, the wastewater level inside it rises. The upper ends of the inner cylinder 2 and the rotating ring seat 6 are both provided with chamfered structures. The chamfered structures at the upper ends of the inner cylinder 2 and the rotating ring seat 6 guide the overflowing oil. The external filter screen 11 performs secondary filtration on the wastewater flowing into the space between the outer cylinder 1 and the inner cylinder 2.

[0022] Printing wastewater is injected into the inner side of the flexible cylinder 9, allowing it to pass through the primary filter 3. The primary filter 3 performs preliminary filtration of particulate impurities in the wastewater. The filtered impurities fall along the inclined surface of the primary filter 3 into the space between the outer cylinder 1 and the inner cylinder 2. Then, the first motor 4 is started. Through the meshing of the transmission gear 5 and the gear ring 7, the first motor 4 drives the rotating ring seat 6 to rotate synchronously. At this time, the rotating ring seat 6 and the lifting ring seat 8 will rotate relative to each other, causing them to twist the flexible cylinder 9. This raises the liquid level inside the flexible cylinder 9. When the liquid level is higher than the upper end of the rotating ring seat 6, the oil on the upper layer of the wastewater will flow out and flow along the inner cylinder 2 and... The chamfered surface at the upper end of the rotating ring seat 6 flows into the space between the outer cylinder 1 and the inner cylinder 2, while the excess overflowing wastewater flows into the bottom of the space between the outer cylinder 1 and the inner cylinder 2 for temporary storage, thereby achieving preliminary filtration and purification, reducing the difficulty of subsequent treatment and purification, and improving the overall filtration and purification effect of the equipment. At the same time, during the twisting and restoration process of the flexible cylinder 9, the volume between the inner cylinder 2 and the flexible cylinder 9 increases, allowing the drain pipe 14 to suck in the waste liquid after secondary filtration between the outer cylinder 1 and the inner cylinder 2, and inject it into the inside of the flexible cylinder 9 through the discharge pipe 15, which facilitates the volume of waste liquid inside the flexible cylinder 9, and facilitates multiple twists to fully discharge the upper layer of oil.

[0023] Subsequently, flocculant is added to the flexible cylinder 9. As the rotating ring seat 6 rotates, it can work with the lifting ring seat 8 to twist the flexible cylinder 9, causing a change in the volume inside the flexible cylinder 9. Simultaneously, the lifting ring seat 8 and the lifting action of the purification filter plate 10 can accelerate the flow of waste liquid and promote the mixing reaction of waste liquid and flocculant. During the twisting and recovery process of the flexible cylinder 9, waste liquid is injected into the inside of the flexible cylinder 9 through the discharge pipe 15, further accelerating the flow and mixing of the waste liquid inside and improving the subsequent reaction purification efficiency. After the reaction is completed, the drain pipe 14 is controlled to discharge the lower layer of wastewater and the upper layer of oil between the outer cylinder 1 and the inner cylinder 2. The rotating ring seat 6 is controlled to rotate again, which can cause the flexible cylinder 9 to twist again. As the diameter of the middle hole of the flexible cylinder 9 gradually decreases, the hydraulic pressure on the lower inner side of the flexible cylinder 9 increases, thereby promoting the filtration of the treated waste liquid and effectively ensuring the filtration effect and efficiency of the purification filter plate 10.

[0024] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Existing wastewater purification devices for printing equipment are inconvenient for effectively and automatically cleaning the filtered material, reducing equipment operating efficiency. To further solve this technical problem, this example discloses the following technical content, such as... Figures 5-9As shown; the outer cylinder 1 is also provided with a lifting assembly for controlling the lifting and lowering adjustment of the purification filter plate 10. The lifting assembly includes a second motor 16 fixedly installed on the upper end of the outer cylinder 1, and a threaded rod 17 is fixedly installed on the output end of the second motor 16. The lower end of the threaded rod 17 is threadedly connected to a bracket 18. At the same time, a guide rod 19 that slides through the bracket 18 is vertically fixedly installed on the lower end of the outer cylinder 1. A sealing elastic sleeve 1001 for protecting the threaded rod 17 is fixedly connected between the purification filter plate 10 and the primary filter screen 3. The bracket 18 is attached to the lower part of the purification filter plate 10, and the outer diameter of the bracket 18 is larger than the inner diameter of the purification filter plate 10. During the process of the bracket 18 rising, it lifts the purification filter plate 10 and moves upward synchronously.

[0025] A fixed cylinder 20 is fixedly installed at the lower end of the primary filter 3, and a lifting sleeve 22 is sleeved below the fixed cylinder 20. The primary filter 3 and the lifting sleeve 22 are connected by a spring to form an elastic lifting structure. During the upward movement of the purification filter plate 10, the lifting sleeve 22 is pushed upward. A ball bearing 21 is embedded in the lower inner wall of the fixed cylinder 20, and a spiral guide groove 23 is opened on the outer side of the lifting sleeve 22. The ball bearing 21 and the guide groove 23 are slidably connected. At the same time, scrapers 24 are evenly arranged on the outer side of the lifting sleeve 22. The lifting sleeve 22 rotates synchronously during the lifting process, and the scrapers 24 clean the filtered material on the purification filter plate 10 during the rotation of the lifting sleeve 22.

[0026] After the purification filter plate 10 finishes filtering, the second motor 16 drives the threaded rod 17, causing the threaded rod 17 to move the bracket 18 upward along the guide rod 19. At this time, the bracket 18 pushes the purification filter plate 10 upward. When the purification filter plate 10 moves to the upper position of the rotating ring seat 6, it will contact the lifting sleeve 22, thereby pushing the lifting sleeve 22 to move upward synchronously, so that the ball 21 rolls along the spiral guide groove 23, causing the lifting sleeve 22 to rotate. At this time, the scraper 24 on the outside of the lifting sleeve 22 can scrape off the flocculent material filtered out on the purification filter plate 10 and push it between the outer cylinder 1 and the inner cylinder 2 for subsequent centralized treatment.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater purification device for printing equipment, comprising an outer cylinder (1), an inner cylinder (2) fixedly installed on the inner side of the outer cylinder (1), a primary filter screen (3) fixedly installed on the upper inner side of the outer cylinder (1), and a drain pipe (14) and a discharge pipe (15) connected to the lower end of the outer cylinder (1), characterized in that, A rotating ring seat (6) is rotatably installed on the inner side of the upper end of the inner cylinder (2), and a driving component for driving the rotating ring seat (6) to rotate is installed on the outer cylinder (1). A lifting ring seat (8) is lifted and lowered on the inner side of the lower end of the inner cylinder (2), and a flexible cylinder (9) is fixedly connected between the rotating ring seat (6) and the lifting ring seat (8). During the rotation of the rotating ring seat (6), the flexible cylinder (9) is driven to twist. At the same time, a purification filter plate (10) is mounted on the lifting ring seat (8). An external filter screen (11) is fixedly connected between the outer cylinder (1) and the inner cylinder (2), and a sealing door for cleaning impurities is provided on the back of the outer cylinder (1). A liquid conveying component for conveying wastewater is connected to the inner cylinder (2) and the flexible cylinder (9). A lifting component for controlling the lifting and lowering adjustment of the purification filter plate (10) is also provided on the outer cylinder (1).

2. The wastewater purification and treatment device for printing equipment according to claim 1, characterized in that: The primary filter (3) is set in a conical structure, and the outer diameter of the lower end of the primary filter (3) is larger than the outer diameter of the inner cylinder (2). The primary filter (3) performs preliminary filtration on the injected printing wastewater.

3. The wastewater purification and treatment device for printing equipment according to claim 1, characterized in that: The drive assembly includes a first motor (4) fixedly installed on the outside of the outer cylinder (1), and a transmission gear (5) is fixedly installed at the output end of the first motor (4). A toothed ring (7) is fixedly installed on the outside of the rotating ring seat (6) through the frame. At the same time, the transmission gear (5) and the toothed ring (7) are meshed and connected. A protective guide plate for blocking wastewater is provided above the toothed ring (7).

4. The wastewater purification and treatment device for printing equipment according to claim 3, characterized in that: The rotating ring seat (6), the lifting ring seat (8) and the flexible cylinder (9) are coaxially arranged, and the outer diameter of the flexible cylinder (9) is smaller than the inner diameter of the inner cylinder (2). The inner cylinder (2) and the lifting ring seat (8) are sealed and sliding. During the rotation of the rotating ring seat (6), the lifting ring seat (8) is adjusted by twisting the flexible cylinder (9).

5. The wastewater purification and treatment device for printing equipment according to claim 4, characterized in that: The lifting ring seat (8) and the purification filter plate (10) are sealed and fitted together. The inner diameter of the lifting ring seat (8) is smaller than the outer diameter of the purification filter plate (10). The outer wall of the purification filter plate (10) is sealed and fitted to the lower inner wall of the flexible cylinder (9). During the lifting process, the lifting ring seat (8) drives the purification filter plate (10) to lift and lower synchronously. The purification filter plate (10) is uniformly provided with a filter membrane structure.

6. The wastewater purification and treatment device for printing equipment according to claim 1, characterized in that: The inner cylinder (2), rotating ring seat (6), lifting ring seat (8), and flexible cylinder (9) form a sealed structure, and the volume between the flexible cylinder (9) and the inner cylinder (2) increases during the torsion process. The infusion assembly includes a suction tube (12) fixedly connected to the inner cylinder (2), and the lower end of the suction tube (12) is located between the outer cylinder (1) and the inner cylinder (2). An injection tube (13) is fixedly connected through the flexible cylinder (9), and the injection tube (13) is also fixedly connected through the flexible cylinder (9). 3) The lower end is located between the inner cylinder (2) and the flexible cylinder (9). The suction pipe (12) and the injection pipe (13) are equipped with one-way valves. The flexible cylinder (9) twists through the suction pipe (12) to suck up the wastewater between the outer cylinder (1) and the inner cylinder (2). When the flexible cylinder (9) is reset, the wastewater sucked up by the suction pipe (12) is injected into the inner side of the flexible cylinder (9) through the injection pipe (13). During the twisting process of the flexible cylinder (9), the wastewater level inside it rises.

7. The wastewater purification and treatment device for printing equipment according to claim 6, characterized in that: The upper ends of the inner cylinder (2) and the rotating ring seat (6) are both provided with chamfered structures. The chamfered structures at the upper ends of the inner cylinder (2) and the rotating ring seat (6) guide the overflowing oil stains. The external filter screen (11) performs secondary filtration on the wastewater flowing between the outer cylinder (1) and the inner cylinder (2).

8. The wastewater purification and treatment device for printing equipment according to claim 1, characterized in that: The lifting assembly includes a second motor (16) fixedly installed on the upper end of the outer cylinder (1), and a threaded rod (17) is fixedly installed on the output end of the second motor (16). The lower end of the threaded rod (17) is threadedly connected to a bracket (18). At the same time, a guide rod (19) that slides through the bracket (18) is vertically fixedly installed on the lower end of the outer cylinder (1). A sealing elastic sleeve (1001) for protecting the threaded rod (17) is fixedly connected between the purification filter plate (10) and the primary filter screen (3). The bracket (18) is attached to the lower part of the purification filter plate (10), and the outer diameter of the bracket (18) is larger than the inner diameter of the purification filter plate (10). During the process of the bracket (18) rising, it lifts the purification filter plate (10) and moves it upward synchronously.

9. The wastewater purification and treatment device for printing equipment according to claim 8, characterized in that: The lower end of the primary filter (3) is fixedly installed with a fixed cylinder (20), and a lifting sleeve (22) is sleeved below the fixed cylinder (20). The primary filter (3) and the lifting sleeve (22) are connected by a spring to form an elastic lifting structure. During the upward movement of the purification filter plate (10), the lifting sleeve (22) is pushed upward. The lower inner wall of the fixed cylinder (20) is embedded with a ball bearing (21), and a spiral guide groove (23) is opened on the outer side of the lifting sleeve (22). The ball bearing (21) and the guide groove (23) are slidably connected. At the same time, scrapers (24) are evenly arranged on the outer side of the lifting sleeve (22). The lifting sleeve (22) rotates synchronously during the lifting process, and the scrapers (24) clean the filtered material on the purification filter plate (10) during the rotation of the lifting sleeve (22).

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