Multi-mode controlled full-automatic cleaning filter

Abstract

The invention discloses a multi-mode controlled full-automatic cleaning filter, and relates to the technical field of cleaning, the multi-mode controlled full-automatic cleaning filter comprises a filter cartridge main body, a scraper shaft is rotatably connected in the filter cartridge main body, a positioning guide pin is slidably connected to the side surface of the scraper shaft, a compensation type scraper is connected to the side surface of the positioning guide pin, and a spring sleeves the side surface of the scraper shaft; a spring is arranged on the upper end face of the filter cartridge body, one end of the spring is connected with the side face of the positioning guide pin, a filter cartridge cover plate is arranged on the upper end face of the filter cartridge body, a support is connected to the upper end face of the filter cartridge cover plate, and an upper heat insulation plate is arranged on the upper end face of the support. The scraper can be automatically attached to the inner surface of the filter screen after being abraded, stable cleaning force is kept all the time, meanwhile, the PTFE material has abrasion resistance and corrosion resistance, a filter cake layer and impurities on the inner surface of the filter screen can be thoroughly scraped off, the filter screen is prevented from being scraped, the regeneration effect of the filter screen is guaranteed, and manual disassembly and cleaning are not needed.

Description

Technical Field

[0001] This invention relates to the field of cleaning technology, specifically to a fully automatic cleaning filter with multi-mode control. Background Technology

[0002] In industrial production (such as chemical, water treatment, food processing, pharmaceutical manufacturing, etc.) and municipal water supply, the filtration and purification of media (mainly liquid, containing suspended particles, impurities, viscous pollutants, etc.) is a core link to ensure production continuity, product quality and equipment safety. As various industries increase their requirements for media cleanliness (such as fine chemicals needing to filter 5-300μm fine impurities, and food processing needing to avoid impurities affecting product purity), as well as the need to optimize production efficiency and operation and maintenance costs;

[0003] Traditional cleaning filters typically have fixed scrapers without wear compensation mechanisms. As usage time increases, the gap between the scraper and the filter screen surface widens, making it impossible to remove the tightly adhered filter cake layer, leading to repeated filter screen clogging. To address this, we propose a fully automatic cleaning filter with multi-mode control. Summary of the Invention

[0004] The purpose of this invention is to provide a fully automatic cleaning filter with multi-mode control.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic cleaning filter with multi-mode control, comprising a filter cartridge body, a scraper shaft rotatably connected inside the filter cartridge body, a positioning guide pin slidably connected to the side of the scraper shaft, a compensating scraper connected to the side of the positioning guide pin, a spring sleeved on the side of the scraper shaft, and one end of the spring connected to the side of the positioning guide pin.

[0006] As a further aspect of the present invention: a filter cartridge cover plate is provided on the upper end face of the filter cartridge body, a bracket is connected to the upper end face of the filter cartridge cover plate, an upper heat insulation plate is provided on the upper end face of the bracket, a reduction worm gear box is installed on the upper end face of the upper heat insulation plate, and a starter motor is installed at the input end of the reduction worm gear box.

[0007] As a further aspect of the present invention: the output end of the geared motor is connected to an upper coupling via a flat key, the upper coupling is connected to a lower coupling via a spacer, and the lower coupling is connected to a drive shaft via an internal hexagon screw.

[0008] As a further embodiment of the present invention: a lower heat insulation plate is installed on the upper end face of the filter cartridge cover plate, a packing gland is installed on the upper end face of the lower heat insulation plate, and a packing and an upper guide sleeve are respectively arranged from bottom to top on the inner wall of the filter cartridge cover plate. The packing gland is connected to the filter cartridge cover plate by external hexagonal screws.

[0009] As a further aspect of the present invention: a mounting bracket is connected to the side of the filter cartridge body, a hard-seal ball valve is connected to the lower end face of the filter cartridge body, and a foot adjustment screw is threadedly connected to the inner wall of the mounting bracket.

[0010] As a further embodiment of the present invention: the inner wall of the drive shaft is connected to the side of the scraper shaft by a pin, a wedge-shaped mesh is connected to the side of the drive shaft, a filter upper positioning support is connected to the inner wall of the filter cartridge body, a filter lower positioning support is connected to the inner wall of the filter cartridge body, and the filter upper positioning support and the filter lower positioning support are connected together to the filter body.

[0011] As a further aspect of the present invention: a pressure gauge is installed on the upper end face of the filter cartridge cover plate, and the filter cartridge cover plate and the filter cartridge body are connected by a common threaded eye bolt.

[0012] As a further aspect of the present invention: a pneumatic quick connector is installed on the upper end face of the filter cartridge cover, and a material venting switch valve is installed at one end of the pneumatic quick connector.

[0013] As a further aspect of the present invention: an inlet pipe and an outlet pipe are respectively installed on the side of the filter cartridge body, and a sewage discharge chamber is provided at the bottom of the interior of the filter cartridge body.

[0014] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows:

[0015] 1. The present invention uses a compensation mechanism consisting of a compensating scraper, a spring, and a positioning guide pin. This mechanism can automatically adhere to the inner surface of the filter screen after the scraper wears down, thus maintaining a stable cleaning force. At the same time, the PTFE material has both wear resistance and corrosion resistance, which can thoroughly scrape off the filter cake layer and impurities on the inner surface of the filter screen while avoiding scratching the filter screen and ensuring the regeneration effect of the filter screen. No manual disassembly and cleaning is required.

[0016] 2. When the pressure difference between the inside and outside of the filter screen reaches the set threshold (1.5-2 times the initial value) monitored by the pressure gauge, the pneumatic motor drives the scraper shaft to rotate the scraper, which only cleans the inner surface of the filter screen locally, while the remaining areas continue to filter normally. The scraped impurities fall into the sewage discharge chamber below the filter cartridge body along with some of the medium, and are quickly discharged through the hard-seal ball valve after cleaning is completed.

[0017] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A magnified diagram is shown in section A.

[0020] Figure 3 This is a top view schematic diagram of an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a compensating scraper in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the positioning guide pin in an embodiment of the present invention.

[0023] In the diagram: 1. Worm gear drive shaft; 2. Upper coupling; 3. Spacer; 4. Lower coupling; 5. Bracket; 6. Packing gland; 7. Lower heat insulation plate; 8. Upper guide sleeve; 9. Packing; 10. Drive shaft; 11. Starter motor; 12. Reduction worm gear box; 13. Upper heat insulation plate; 14. Pressure gauge; 15. Pneumatic quick connector; 16. Material venting switch valve; 17. Filter cartridge cover plate; 18. Lifting eye bolt; 19. Filter cartridge body; 20. Wedge mesh; 21. Scraper shaft; 22. Filter screen positioning support; 23. Compensating scraper; 24. Filter screen lower positioning support; 25. Hard seal ball valve; 26. Mounting bracket; 27. Anchor adjusting screw; 28. Positioning guide pin; 29. ​​Spring. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0025] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Please see the appendix Figure 1 - Appendix Figure 5 The present invention discloses a fully automatic cleaning filter with multi-mode control, comprising a filter cartridge body 19, a scraper shaft 21 rotatably connected inside the filter cartridge body 19, a positioning guide pin 28 slidably connected to the side of the scraper shaft 21, a compensating scraper 23 connected to the side of the positioning guide pin 28, and a spring 29 sleeved on the side of the scraper shaft 21, one end of the spring 29 being connected to the side of the positioning guide pin 28.

[0027] In embodiment 1, a filter cartridge cover plate 17 is provided on the upper end face of the filter cartridge body 19. A bracket 5 is connected to the upper end face of the filter cartridge cover plate 17. An upper heat insulation plate 13 is provided on the upper end face of the bracket 5. A reduction worm gear box 12 is installed on the upper end face of the upper heat insulation plate 13. A starter motor 11 is installed at the input end of the reduction worm gear box 12. An upper coupling 2 is connected to the output end of the reduction worm gear box 12 via a flat key. A lower coupling 4 is connected to the upper coupling 2 via a spacer 3. A drive shaft 10 is connected to the lower coupling 4 via an internal hex screw. A lower heat insulation plate 7 is installed on the upper end face of the filter cartridge cover plate 17. A packing gland 6 is installed on the upper end face of the lower heat insulation plate 7. A packing 9 and an upper guide sleeve 8 are respectively provided from bottom to top on the inner wall of the filter cartridge cover plate 17. The packing gland 6 is connected to the filter cartridge cover plate 17 via an external hex screw.

[0028] Specifically, the starter motor 11 is a pneumatic motor, which is connected to the air source through the pneumatic quick connector 15 (the air pressure must match the working pressure of the equipment, with a minimum of 0.15MPa) to ensure safe operation in humid and dusty industrial environments and avoid the risk of motor short circuit. The reduction worm gear box 12 not only plays a role in speed reduction, but also converts the high-speed rotation of the pneumatic motor into the stable low-speed rotation of the scraper shaft 21. At the same time, the worm gear structure achieves reverse self-locking to prevent the scraper shaft 21 from reversing due to the resistance of the medium during the cleaning process.

[0029] The upper coupling 2 is connected to the output end of the reduction worm gear box 12 by a flat key (the flat key model must match the motor shaft diameter to ensure that power is transmitted without slippage). The lower coupling 4 is fixed to the transmission shaft 10 by an internal hex screw (the screw specification must meet the torque requirements to prevent loosening during high-speed rotation). The two are isolated by a spacer 3 to reduce vibration transmission. The spacer 3 is preferably made of elastic rubber, which can buffer the radial deviation between the drive unit and the transmission shaft 10 and extend the life of bearings and other components.

[0030] The filler 9 (preferably made of flexible graphite or polytetrafluoroethylene) on the inner wall of the filter cartridge cover plate 17 fills the gap between the upper guide sleeve 8 and the filter cartridge cover plate 17. The filler gland 6 is tightened by tightening the external hexagonal screws, which compresses and deforms the filler 9 and makes it fit tightly against the outer wall of the drive shaft 10, thus achieving dynamic sealing (it can still prevent media leakage when the drive shaft 10 rotates), and preventing unfiltered media from mixing into the outlet from the shaft gap.

[0031] In embodiment two, a mounting bracket 26 is connected to the side of the filter cartridge body 19, and a hard-seal ball valve 25 is connected to the lower end face of the filter cartridge body 19. An adjusting screw 27 is threaded onto the inner wall of the mounting bracket 26. The inner wall of the drive shaft 10 is connected to the side of the scraper shaft 21 via a pin. A wedge-shaped mesh 20 is connected to the side of the drive shaft 10. A filter screen positioning support 22 is connected to the inner wall of the filter cartridge body 19, and a filter screen lower positioning support 24 is connected to the inner wall of the filter cartridge body 19. The filter body is connected to the base 22 and the filter screen lower positioning support 24. A pressure gauge 14 is installed on the upper end face of the filter cartridge cover plate 17. The filter cartridge cover plate 17 and the filter cartridge body 19 are connected by a common threaded eye bolt 18. A pneumatic quick connector 15 is installed on the upper end face of the filter cartridge cover plate 17. A material venting switch valve 16 is installed at one end of the pneumatic quick connector 15. An inlet pipe and an outlet pipe are installed on the side of the filter cartridge body 19 respectively. A sludge discharge chamber is opened at the bottom inside the filter cartridge body 19.

[0032] Specifically, the filter body has a filtration accuracy of 5-300μm and is made of stainless steel wire mesh. It is fixed by the upper positioning support 22 and the lower positioning support 24 of the filter. The inner side of the support is equipped with a rubber buffer pad to avoid the mesh deformation caused by direct contact between the filter and the metal support. At the same time, it buffers the impact of the medium flow on the filter and extends the service life of the filter.

[0033] The wedge-shaped mesh 20 (made of the same material as the filter body) connected to the side of the drive shaft 10 surrounds the outside of the scraper shaft 21, forming a secondary filtration barrier. When the impurity particles scraped off by the compensating scraper 23 are large, the wedge-shaped mesh 20 can intercept these impurities and prevent them from clogging the filter holes with the flow of the medium. It is especially suitable for working conditions with uneven impurity particle size (such as municipal sewage filtration).

[0034] The mounting bracket 26 is made of carbon steel (with anti-corrosion surface treatment, such as galvanizing) and is welded to the side of the filter cartridge body 19 (2-4 are symmetrically arranged to ensure balanced support). The foot adjustment screw 27 on its inner wall is 10-15cm long. The height of the equipment can be adjusted by rotating the screw (range ±5cm) to adapt to uneven workshop floors, while ensuring that the filter cartridge body 19 is in a horizontal state to avoid uneven accumulation of impurities in the discharge chamber due to tilting.

[0035] The hard-seal ball valve 25 (made of stainless steel with a hard alloy sealing surface) is installed on the lower end face of the filter cartridge body 19 and is directly connected to the sewage discharge chamber. Its diameter must match the outlet of the sewage discharge chamber (to ensure that impurities are discharged quickly and without residue). The valve's opening and closing stroke is 90°. It can be controlled manually or pneumatically (equipped with a pneumatic actuator, which needs to be linked with the manual directional valve). It can quickly open the sewage discharge after cleaning and adapt to the continuous cycle requirements of cleaning and sewage discharge.

[0036] Pressure gauge 14 is installed on the upper end face of filter cartridge cover plate 17 (connected to the inner cavity of the filter cartridge to monitor the pressure of the clean medium). The range must cover the working pressure range of the equipment (usually 0-1MPa), and the accuracy class is 1.6. Operators can judge the filtration status by the change in the reading of pressure gauge 14. For example, if the initial pressure is 0.3MPa, when the pressure drops below 0.15MPa (the pressure difference reaches 0.15MPa, which is 1.5 times the initial value), the cleaning procedure needs to be triggered (operation guide pressure drop monitoring standard).

[0037] Working principle:

[0038] First, the filter medium enters the cavity through the inlet pipe on the side of the filter cartridge body 19. Due to the isolation effect of the upper baffle, it can only enter the inner cavity through the mesh of the filter screen body (to prevent unfiltered medium from directly mixing into the outlet). Fine impurities in the medium (such as particles and suspended solids) are intercepted on the inner surface of the filter screen, forming a filter cake layer (which can improve the filtration accuracy in the initial stage). The filtered clean medium is collected through the middle cavity of the upper and lower baffles and finally output from the outlet pipe. Some impurities that are not completely intercepted sink to the sewage discharge chamber at the bottom of the filter cartridge body 19 under the action of the medium's own weight, and are temporarily stored for subsequent cleaning and discharge to avoid the accumulation of impurities clogging the filter screen holes.

[0039] The cleaning process achieves continuous filtration and rapid cleaning. Its core principle is to determine the cleaning timing based on pressure difference, combined with pneumatic control and compensation mechanisms to ensure thorough cleaning. The specific steps are as follows:

[0040] As filtration continues, the amount of impurities accumulating on the inner surface of the filter increases, resulting in a pressure difference between the inside and outside of the filter. When the pressure gauge 14 detects that the pressure difference reaches 1.5-2 times the initial value (e.g., from 0.05MPa initially to 0.1-0.15MPa), or the flow rate drops by more than 20%, the cleaning program is triggered. By switching the direction of the manual reversing valve, the pneumatic quick connector 15 connects to the air source, and the pneumatic motor 11 is started. The motor power is reduced by the reduction worm gear box 12 and transmitted to the drive shaft 10 through the upper coupling 2 (buffered by the spacer 3) and the lower coupling 4, which drives the scraper shaft 21 to rotate synchronously. When the scraper shaft 21 rotates, the compensating scraper 23 on the side is always in contact with the inner surface of the filter under the dual action of the spring force of the spring 29 and the positioning guide pin 28 (even if the scraper is worn, the spring 29 will push the positioning guide pin 28 to move the scraper downward, achieving automatic compensation). The PTFE material scraper thoroughly removes the filter cake layer and impurities from the inner surface of the filter by rotation, avoiding scratching the filter.

[0041] The scraped impurities fall into the drain chamber along with some of the medium. After cleaning, the manual reversing valve is switched to restore the initial state, the pneumatic motor 11 stops, the scraper assembly returns to the starting position, the hard-seal ball valve 25 is opened, and the impurities in the drain chamber are quickly discharged through the drain port. The equipment enters the next filtration cycle (during the cleaning process, the remaining filter areas continue to filter normally, achieving continuous cleaning). The scraper and the scraper shaft 21 are connected by a spring 29 and a positioning guide pin 28. When the scraper wears down due to long-term use, the elastic force of the spring 29 will push the positioning guide pin 28 to slide along the scraper shaft 21, causing the scraper to move towards the filter screen, always maintaining contact with the inner surface of the filter screen, thus solving the problem of incomplete cleaning after the traditional scraper wears down.

[0042] The upper end face of the filter cartridge cover plate 17 is provided with an upper heat insulation plate 13 (corresponding to the reduction gearbox 12) and a lower heat insulation plate 7 (corresponding to the packing gland 6) to prevent the heat from the motor from being transferred to the inside of the filter cartridge and affecting the properties of the medium. At the same time, the packing gland 6 is fixed to the filter cartridge cover plate 17 with external hexagonal screws. The internal packing 9 (such as a sealing gasket) cooperates with the upper guide sleeve 8 to prevent the medium from leaking or external impurities from entering. The pressure gauge 14 on the filter cartridge cover plate 17 monitors the pressure difference inside and outside the filter screen in real time. Combined with the flow rate change data, the degree of filter screen blockage is accurately judged to avoid over-cleaning or untimely cleaning. At this point, the entire process is completed.

[0043] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0044] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0046] For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A fully automatic cleaning filter with multi-mode control, comprising a filter cartridge body (19), characterized in that: The filter cartridge body (19) is rotatably connected to a scraper shaft (21), and a positioning guide pin (28) is slidably connected to the side of the scraper shaft (21). A compensating scraper (23) is connected to the side of the positioning guide pin (28), and a spring (29) is sleeved on the side of the scraper shaft (21). One end of the spring (29) is connected to the side of the positioning guide pin (28).

2. The fully automatic cleaning filter with multi-mode control according to claim 1, characterized in that: The filter cartridge body (19) is provided with a filter cartridge cover plate (17) on its upper end surface. A bracket (5) is connected to the upper end surface of the filter cartridge cover plate (17). An upper heat insulation plate (13) is provided on the upper end surface of the bracket (5). A reduction worm gear box (12) is installed on the upper end surface of the upper heat insulation plate (13). A starter motor (11) is installed at the input end of the reduction worm gear box (12).

3. The fully automatic cleaning filter with multi-mode control according to claim 2, characterized in that: The output end of the reduction worm gear box (12) is connected to an upper coupling (2) via a flat key. The upper coupling (2) is connected to a lower coupling (4) via a spacer (3). The lower coupling (4) is connected to a drive shaft (10) via an internal hex screw.

4. The fully automatic cleaning filter with multi-mode control according to claim 2, characterized in that: The upper end face of the filter cartridge cover (17) is equipped with a lower heat insulation plate (7), and the upper end face of the lower heat insulation plate (7) is equipped with a packing gland (6). The inner wall of the filter cartridge cover (17) is provided with a packing (9) and an upper guide sleeve (8) respectively arranged from bottom to top. The packing gland (6) and the filter cartridge cover (17) are connected by external hexagonal screws.

5. The fully automatic cleaning filter with multi-mode control according to claim 1, characterized in that: The filter cartridge body (19) is connected to a mounting bracket (26) on its side, and a hard-seal ball valve (25) is connected to the lower end face of the filter cartridge body (19). The mounting bracket (26) is connected to a ground adjustment screw (27) by a thread on its inner wall.

6. The fully automatic cleaning filter with multi-mode control according to claim 3, characterized in that: The inner wall of the drive shaft (10) is connected to the side of the scraper shaft (21) by a pin. A wedge mesh (20) is connected to the side of the drive shaft (10). A filter upper positioning support (22) is connected to the inner wall of the filter cartridge body (19). A filter lower positioning support (24) is connected to the inner wall of the filter cartridge body (19). The filter upper positioning support (22) and the filter lower positioning support (24) are connected together by the filter body.

7. A fully automatic cleaning filter with multi-mode control according to claim 2, characterized in that: A pressure gauge (14) is installed on the upper end face of the filter cartridge cover plate (17), and the filter cartridge cover plate (17) and the filter cartridge body (19) are connected by a common threaded eye bolt (18).

8. A fully automatic cleaning filter with multi-mode control according to claim 2, characterized in that: The upper end face of the filter cartridge cover (17) is equipped with a pneumatic quick connector (15), and a material venting switch valve (16) is installed at one end of the pneumatic quick connector (15).

9. A fully automatic cleaning filter with multi-mode control according to claim 1, characterized in that: The filter cartridge body (19) is equipped with an inlet pipe and an outlet pipe on its side, and a sewage discharge chamber is provided at the bottom of the interior of the filter cartridge body (19).

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