A cleaning liquid circulating filter device for a glass cleaning machine

Abstract

The application discloses the technical fields of glass cleaning fluid recycling, and relates to a cleaning fluid circulating filter device for a glass cleaning machine, which comprises a filter cylinder body. A cylindrical filter screen is coaxially arranged in the filter cylinder body, and the filter screen separates the inner cavity of the filter cylinder body into a filtering cavity and a clean filtering cavity. The filter cylinder body is provided with an inlet and an outlet. A rotating shaft is further arranged in the filter cylinder body, the rotating shaft is rotatably arranged in the filtering cavity and the filter cylinder body, a scraping brush assembly is fixedly connected to the inner surface of the filter screen, and a driving motor is connected to one end of the rotating shaft. The device further comprises pressure detection assemblies arranged on the inlet side and the outlet side respectively, and a control box connected to the pressure detection assemblies and the control end of the driving motor, and the control box controls the start and stop of the driving motor according to the pressure difference between the two sides of the filter screen. The oil stains on the surface of the filter screen are mechanically scraped by the scraping brush assembly, the oil film is completely removed, the machine does not need to be stopped for maintenance, and the cleaning intensity is self-adaptive.

Description

Technical Field

[0001] This invention relates to the field of glass cleaning fluid recycling technology, and in particular to a cleaning fluid recycling and filtration device for glass cleaning machines. Background Technology

[0002] When cleaning glass substrates, glass cleaning machines typically recycle the cleaning solution to reduce costs and emissions. This means that the used waste liquid is filtered and then returned to the spray system for reuse.

[0003] Existing circulating filtration systems typically use filters installed in the pipelines to purify and reuse the cleaning fluid by intercepting solid particles. However, glass cleaning fluids contain not only particulate impurities but also a significant amount of oily substances such as rust-preventive oil and cutting oil. These oily substances easily adhere to the filter surface when passing through the filter, forming an oil film that is difficult to remove completely by conventional backwashing alone. Manual disassembly and cleaning of the filter is often required, necessitating system shutdown during cleaning, which disrupts the continuous supply of cleaning fluid and increases maintenance costs. Furthermore, existing systems are mostly maintained on a fixed schedule, lacking a means to adaptively adjust the cleaning intensity based on the degree of filter contamination, which can easily lead to problems such as untimely or excessive cleaning.

[0004] Therefore, how to achieve online automatic removal of oil stains on the filter screen surface while ensuring continuous circulation of cleaning fluid has become an urgent technical problem to be solved. Summary of the Invention

[0005] (a) Technical problems to be solved The main objective of this invention is to provide a cleaning fluid circulation filtration device for glass cleaning machines, which solves the technical problems of existing filtration devices having difficulty in removing oil stains from the filter screen surface, requiring frequent machine shutdowns for disassembly and cleaning, and affecting the continuous supply of cleaning fluid.

[0006] (II) Technical Solution To achieve the above objectives, the technical solution adopted by the present invention is as follows: A cleaning fluid circulation filtration device for a glass cleaning machine includes a filter cylinder. A cylindrical filter screen is coaxially arranged inside the filter cylinder, dividing the inner cavity of the filter cylinder into a filter chamber located inside the filter screen and a clean filter chamber located outside the filter screen. The filter cylinder has an inlet communicating with the filter chamber and an outlet communicating with the clean filter chamber. A rotating shaft is also provided inside the filter cylinder, passing through the filter chamber and rotatably mounted within the filter cylinder. A scraper assembly that adheres to the inner surface of the filter screen is fixedly connected to the rotating shaft, and a drive motor is connected to one end of the rotating shaft. The device also includes pressure detection components respectively located on the inlet and outlet sides, and a control box connected to the pressure detection components and the control terminal of the drive motor. The control box controls the start and stop of the drive motor based on the pressure difference across the filter screen.

[0007] Furthermore, the control box presets two differential pressure thresholds and controls the drive motor to switch between different speed levels based on the real-time detected differential pressure range.

[0008] Furthermore, when the pressure difference reaches a higher threshold, the control box controls the drive motor to drive the rotating shaft to rotate alternately in both directions.

[0009] Furthermore, the bottom of the filter cylinder is equipped with a conical sludge collection hopper, and the bottom of the sludge collection hopper is equipped with a drain port and a drain valve. The drain valve is electrically connected to the control box and is automatically opened by the control box according to a set cycle or liquid level signal.

[0010] Furthermore, the scraper assembly includes a scraper arm fixed on a rotating shaft and a scraper blade installed at the end of the scraper arm, the scraper blade being radially attached to the inner surface of the filter screen.

[0011] Furthermore, a circulation pump is installed in the downstream pipeline of the outlet, which is used to transport the filtered cleaning solution back to the spray supply system of the glass washing machine.

[0012] Furthermore, an annular mounting seat is provided on the upper part of the inner wall of the filter cartridge. The upper end of the filter screen is sealed and fixed to the annular mounting seat, while the lower end of the filter screen is suspended.

[0013] Furthermore, the upper and lower ends of the rotating shaft are respectively mounted on the top cover and the bottom bearing seat of the filter cylinder via waterproof bearings.

[0014] This invention also includes other components that enable the glass cleaning machine's cleaning fluid circulation and filtration device to function properly, all of which employ conventional techniques in the art. Furthermore, devices and components not limited in this invention employ conventional techniques in the art, such as the drive motor and circulation pump mentioned in this application. In specific implementations, appropriate equipment or component models can be selected according to the specific working scenario.

[0015] The working principle of this invention is as follows: During operation, the cleaning fluid enters the filter chamber through the inlet, passes through the filter screen from the inside to the outside, and enters the clean filter chamber. It is then returned to the cleaning machine's spray system via the outlet and a circulating pump for reuse. During operation, the pressure detection component monitors the pressure difference across the filter screen in real time and sends feedback to the control box. When the pressure difference reaches a preset threshold, the control box starts the drive motor, which drives the rotating shaft to rotate the scraper blades of the scraper assembly along the inner surface of the filter screen, scraping away the attached oil and scale. The higher the pressure difference, the higher the rotation speed. When the pressure difference reaches a relatively high threshold, the rotating shaft rotates alternately in both directions to enhance the scraping effect. The scraped-off dirt settles into the collection hopper and is discharged periodically through the drain outlet by the drain valve controlled by the control box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. More thorough oil film removal: The oil stains on the filter screen surface are mechanically scraped off by the scraper assembly, overcoming the defect that backwashing is difficult to remove the oil film; 2. No downtime required for maintenance: The cleaning process is completed automatically online, ensuring a continuous supply of cleaning fluid and reducing maintenance costs; 3. Adaptive cleaning intensity: The brush speed is controlled by differential pressure grading to avoid insufficient or wasteful cleaning caused by fixed cycle cleaning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a cleaning fluid circulation filtration device for a glass cleaning machine according to the present invention.

[0018] Figure 2 This is a system block diagram of the present invention.

[0019] In the diagram: 1. Filter cylinder; 2. Filter screen; 3. Liquid inlet; 4. Liquid outlet; 5. Filter chamber; 6. Clean filter chamber; 7. Rotating shaft; 8. Scraper assembly; 81. Scraper arm; 82. Scraper blade; 9. Drive motor; 10. Pressure detection assembly; 11. Control box; 12. Sludge collection hopper; 13. Sludge outlet; 14. Sludge valve; 15. Circulating pump; 16. Annular mounting base; 17. Waterproof bearing. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Example: like Figures 1-2 As shown, a cleaning fluid circulation filtration device for a glass cleaning machine includes a filter cylinder 1. The filter cylinder 1 has a diameter of approximately 400 mm and a height of approximately 800 mm. The filter screen 2 is made of 200-mesh stainless steel woven mesh, with its upper end sealed and fixed to an annular mounting seat 16 located on the upper part of the inner wall of the filter cylinder 1, and its lower end suspended. The filter chamber 5 is located inside the filter screen 2, and the clean filter chamber 6 is located outside the filter screen 2. The liquid inlet 3 is connected to the filter chamber 5, and the liquid outlet 4 is connected to the clean filter chamber 6.

[0022] The rotating shaft 7 passes through the filter chamber 5, and its upper and lower ends are respectively mounted on the top cover and bottom bearing seat of the filter cylinder 1 via waterproof bearings 17. A scraper assembly 8 is fixedly connected to the rotating shaft 7. The scraper assembly 8 includes a scraper arm 81 and a scraper blade 82 installed at its end. The scraper blade 82 is radially attached to the inner surface of the filter screen 2. One end of the rotating shaft 7 is connected to a 0.75kW variable frequency drive motor 9 via a coupling, and the speed range is adjustable from 0 to 60 r / min.

[0023] Pressure detection components 10 are respectively installed on both sides of the liquid inlet 3 and the liquid outlet 4. The detection signals are input to the control box 11. The control box 11 has preset first-level differential pressure threshold of 0.03MPa and second-level differential pressure threshold of 0.08MPa. (1) The drive motor 9 stops when the pressure difference is lower than the first-level threshold; (2) When the pressure difference reaches the first-level threshold but is lower than the second-level threshold, the drive motor 9 drives the rotating shaft 7 to rotate in one direction at a low speed of 15r / min; (3) When the pressure difference reaches or exceeds the secondary threshold, the drive motor 9 switches to the high speed gear of 45r / min and drives the rotating shaft 7 to rotate alternately in both directions once every 30 seconds; (4) After the differential pressure recovers to below the first-level threshold and remains there for a certain period of time, the drive motor 9 will stop automatically.

[0024] The bottom of the filter cylinder 1 is equipped with a sludge collection hopper 12 with a volume of approximately 5L. The dirt scraped off by the scraper blades 82 settles into the sludge collection hopper 12. The control box 11 controls the drain valve 14 to automatically open the drain port 13 for 5 seconds every 2 hours or when the liquid level in the sludge collection hopper 12 reaches a set value. A circulation pump 15 is installed in the downstream pipeline of the outlet 4 to pressurize and transport the filtered clear liquid in the clean filter chamber 6 back to the spray liquid supply system of the glass washing machine, forming a continuous circulation.

[0025] The working principle of the cleaning fluid circulation filtration device for a glass cleaning machine of the present invention is as follows: During operation, the cleaning fluid enters the filter chamber 5 through the inlet 3, passes through the filter screen 2 from the inside to the outside, enters the clean filter chamber 6, and is then sent back to the cleaning machine spray system for recycling through the outlet 4 and the circulation pump 15. During operation, the pressure detection component 10 detects the pressure difference on both sides of the filter screen 2 in real time and feeds it back to the control box 11; when the pressure difference reaches a preset threshold, the control box 11 starts the drive motor 9, which drives the rotating shaft 7 to drive the scraper blades 82 of the scraper component 8 to rotate along the inner surface of the filter screen 2, scraping off the attached oil and scale. The higher the pressure difference, the higher the speed setting. When the pressure difference reaches a higher threshold, the rotating shaft 7 rotates alternately in both directions to enhance the scraping effect. The scraped-off dirt settles into the collection hopper 12, and is discharged through the drain outlet 13 at regular intervals by the drain valve 14 controlled by the control box 11.

[0026] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A cleaning fluid circulation filtration device for a glass cleaning machine, comprising a filter cylinder (1), characterized in that: A cylindrical filter screen (2) is coaxially arranged inside the filter cylinder (1). The filter screen (2) divides the inner cavity of the filter cylinder (1) into a filter chamber (5) located inside the filter screen (2) and a clean filter chamber (6) located outside the filter screen (2). The filter cylinder (1) is provided with an inlet (3) communicating with the filter chamber (5) and an outlet (4) communicating with the clean filter chamber (6). The filter cylinder (1) is also provided with a rotating shaft (7), which passes through the filter chamber (5) and is rotatably installed on the filter cylinder. In the filter cartridge (1), a scraper assembly (8) that fits against the inner surface of the filter screen (2) is fixedly connected to the rotating shaft (7), and a drive motor (9) is connected to one end of the rotating shaft (7); the device also includes a pressure detection assembly (10) respectively set on the side of the liquid inlet (3) and the side of the liquid outlet (4), and a control box (11) connected to the pressure detection assembly (10) and the control end of the drive motor (9). The control box (11) controls the start and stop of the drive motor (9) according to the pressure difference on both sides of the filter screen (2).

2. The cleaning fluid circulation and filtration device for a glass cleaning machine according to claim 1, characterized in that: The control box (11) presets two levels of differential pressure thresholds and controls the drive motor (9) to switch different speed gears according to the range of differential pressure detected in real time.

3. The cleaning fluid circulation and filtration device for a glass cleaning machine according to claim 2, characterized in that: When the pressure difference reaches a high threshold, the control box (11) controls the drive motor (9) to drive the rotating shaft (7) to rotate alternately in both directions.

4. The cleaning fluid circulation and filtration device for a glass cleaning machine according to claim 1, characterized in that: The bottom of the filter cylinder (1) is provided with a conical sludge collection hopper (12), and the bottom of the sludge collection hopper (12) is provided with a drain port (13) and a drain valve (14). The drain valve (14) is electrically connected to the control box (11) and is automatically opened by the control box (11) according to the set cycle or liquid level signal.

5. The cleaning fluid circulation filtration device for a glass cleaning machine according to claim 1, characterized in that: The scraper assembly (8) includes a scraper arm (81) fixed on a rotating shaft (7) and a scraper blade (82) installed at the end of the scraper arm (81), the scraper blade (82) being radially attached to the inner surface of the filter screen (2).

6. The cleaning fluid circulation filtration device for a glass cleaning machine according to claim 1, characterized in that: The downstream pipeline of the outlet (4) is equipped with a circulation pump (15), which is used to transport the filtered cleaning liquid back to the spray supply system of the glass cleaning machine.

7. The cleaning fluid circulation and filtration device for a glass cleaning machine according to claim 1, characterized in that: The filter cylinder (1) has an annular mounting seat (16) on the upper part of its inner wall; the upper end of the filter screen (2) is sealed and fixed to the annular mounting seat (16), and the lower end of the filter screen (2) is suspended.

8. The cleaning fluid circulation filtration device for a glass cleaning machine according to claim 1, characterized in that: The upper and lower ends of the rotating shaft (7) are respectively installed on the top cover and the bottom bearing seat of the filter cylinder (1) through waterproof bearings (17).

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