Filter system of cleaning machine

Abstract

The invention provides a filtering system of a cleaning machine, and belongs to the technical field of cleaning equipment. The technical problem that in the prior art, the filtering capacity is poor is solved. The filter system of the cleaning machine comprises a magnetic separator, a primary filter and a secondary filter which are sequentially connected between an oil return end and an oil inlet end of the cleaning machine, an oil return flow guide area is arranged in the primary filter, the oil return flow guide area is communicated with the primary settling area through an oil return steady flow area and a sheet type filter unit in sequence, and an oil outlet of a circuitous flow guide unit is far away from an oil inlet of the oil return steady flow area; a secondary settling zone and a permeation waiting zone are arranged in the secondary filter, the secondary settling zone is connected with the primary settling zone and can receive liquid flowing out of the primary settling zone, a honeycomb type oil passing and sewage settling unit is arranged between the secondary settling zone and the permeation waiting zone, and a permeation type filter unit is arranged in the permeation waiting zone; the device has the advantages of good filtering effect, convenience in maintenance, stable filtering effect and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cleaning equipment, in particular to a cleaning machine filtering system. BACKGROUND

[0002] The cleaning machine is widely used in the cleaning work of parts, molds, equipment and the like in industrial production, and the oil used in the cleaning process often carries metal chips, dust, oil stains and other impurities. If these impurities cannot be effectively removed, not only the cleaning effect will be affected, but also the cleaning machine system will be blocked, the wear will be aggravated, and even the equipment life and work safety will be affected.

[0003] The existing cleaning oil filtering system is all pressure filter core type filtering or pressure centrifugal filtering, which has the problems of incomplete separation of very small particles, insufficient filtering, influence on the service life of the cleaning oil, increase of production cost and waste of resources, and is difficult to meet the production demand of high efficiency and environmental protection. For example, the centrifugal filtering can only separate impurities with large difference in specific gravity, and the filtering precision is 5-25um; the filtering precision of the filter core type is sufficient, but when it is less than 10um, the filter core is very easy to be blocked, and the replacement is very frequent, which affects the production efficiency and is too high in cost.

[0004] In addition, in actual production, very small impurities less than 1um will be generated in the cleaning of steel plates. The filtering system of the prior art cannot filter such substances, and when the concentration accumulates to a certain degree, new cleaning oil needs to be replaced, resulting in high production cost. SUMMARY

[0005] The purpose of the application is to provide a cleaning machine filtering system with stronger filtering capacity for the above problems.

[0006] In order to achieve the above purpose, the following technical scheme is adopted in the present application: the cleaning machine filtering system comprises a magnetic separator, a primary filter and a secondary filter which are connected in sequence between the oil return end and the oil inlet end of the cleaning machine; The primary filter is provided with a return oil flow guide area, the return oil flow guide area is provided with a circuitous flow guide unit, the oil outlet of the magnetic separator is communicated with the circuitous flow guide unit, and the return oil flow guide area is communicated with the primary sedimentation area through a return oil steady flow area and a sheet type filtering unit in sequence; The secondary filter is provided with a secondary sedimentation area and a permeation waiting area, the secondary sedimentation area is connected with the primary sedimentation area to receive the liquid flowed out of the primary sedimentation area, a honeycomb type oil passing and dirt collecting unit is arranged between the secondary sedimentation area and the permeation waiting area, and a permeation type filtering unit is arranged in the permeation waiting area, and the permeation type filtering unit is connected with an oil outlet interface leading to the oil inlet end of the cleaning machine.

[0007] The magnetic separator is used to remove the large magnetic impurities first, so as to protect the subsequent filter mechanism from being abraded or blocked by the large metal chips. The first filter performs medium-precision filtration and preliminary precipitation. The second filter performs fine filtration and final purification. Through the series purification mode, each filter can purify in multiple links, so that higher cleanliness is achieved.

[0008] In the filter system of the cleaning machine, the bypass flow guide unit comprises a flow guide channel formed by N transversely distributed bypass structures in the oil return flow guide area, and N≥1. The flow guide channel inlet is connected with the magnetic separator outlet, and the flow guide channel outlet is communicated with the oil return flow guide area inlet. A dirt separation unit is arranged in the flow guide channel to reduce the flow of dirt into the oil return flow stabilizing area. The oil cannot flow directly to the outlet, which increases the residence time and flow path of the oil in the flow guide area, and reduces the carrying capacity of the oil for solid particles. This provides sufficient settling time for heavy impurity particles, allowing them to naturally settle under gravity to the bottom. High-efficiency and energy-saving treatment is achieved. Moreover, the dirt separation unit forms a physical barrier to block the accumulated pollutants on one side of the flow guide area, ensuring the filtration efficiency.

[0009] In the filter system of the cleaning machine, the dirt separation unit comprises a dirt separation plate arranged at the bending portion. The lower end of the dirt separation plate is integrated with the bottom of the oil return flow guide area, and the upper end of the dirt separation plate forms a flow passage between the inlet and outlet of the bypass structure. A porous separation plate is arranged at the outlet of each bypass structure. The dirt settled in the flow guide channel naturally accumulates at the bottom of the flow guide area. The dirt separation plate can prevent the oil flow from disturbing the settled dirt and bringing it into the subsequent process. The dirt separation plate effectively protects the subsequent sheet filter unit and permeable filter element, and improves the quality of the oil entering the subsequent stage.

[0010] In the filter system of the cleaning machine, the oil inlet of the oil return flow stabilizing area is in a strip shape and is arranged horizontally. The oil outlet of the oil return flow stabilizing area is provided with a separation plate. The sheet filter unit comprises a plurality of filter sheets distributed from the oil outlet to the oil inlet. The strip-shaped and horizontally arranged oil inlet reduces the local flow rate, so that the oil can fill the entire cross section of the flow stabilizing area smoothly and uniformly. This creates conditions for the subsequent sheet filtration, avoids blockage or damage caused by excessive local flow rate, thereby prolonging the service life of the filter sheet and improving the overall filtration efficiency.

[0011] In the above-mentioned cleaning machine filter system, the primary sedimentation zone is arranged at one end of the oil return guide area and the oil return steady flow area, the sheet type filter unit is arranged on one side of the oil return steady flow area and between the oil return steady flow area and the primary sedimentation zone, the primary sedimentation zone is provided with a dirty oil pump, and an oil suction filter is arranged on the lower end of the dirty oil pump. After sheet type filtration, the larger impurities in the oil are removed. At this time, the oil enters the primary sedimentation zone, and the sedimentation zone can focus on processing smaller size and more difficult to intercept suspended particles. The oil suction filter is installed on the lower end of the dirty oil pump, which can prevent impurities from entering the pump body, avoid wear, jam and damage inside the pump body, and improve the stability of the overall filtration.

[0012] In the above-mentioned cleaning machine filter system, the honeycomb type oil passing and dirt collecting unit comprises an oil passing device, a plurality of vertically inclined bottom surfaces and honeycomb type distribution oil passing channels are arranged on the oil passing device, one end of the secondary sedimentation zone is communicated with the top oil inlet interface through a vertical oil feeding channel, at least one dirt discharge storage bin is arranged at the bottom of the secondary sedimentation zone at the lower end of the oil passing channel, the dirt discharge storage bin is communicated with a dirt discharge pipeline, and the oil passing channel is provided with the permeable filter unit above. The vertically inclined bottom surface of the oil passing channel is a surface that can "adhere" and "slide down" for the impurities in the rising oil. After the impurity particles hit the inclined wall, the direction of movement is changed from rising with the oil to sliding down along the wall, returning to the bottom of the secondary sedimentation zone. Compared with a simple vertical channel, the inclined channel increases the probability of contact and collision between impurity particles and the wall surface of the channel, thereby improving the separation efficiency. The honeycomb type distribution can provide a larger total surface area in a limited space, and the structure is more compact.

[0013] In the above-mentioned cleaning machine filter system, the permeable filter unit comprises at least one transversely arranged oil collecting pipe, a plurality of permeable filter cartridges are arranged on the oil collecting pipe in the axial direction, one end of the oil collecting pipe is closed, the other end is communicated with the clean oil area, a first heating unit is arranged in the clean oil area, and an oil outlet interface is connected to the clean oil area. When the oil temperature is low, the viscosity is large, and the flowability is poor. Heating before the final outlet can reduce the viscosity and improve the cleaning effect. At the same time, coking or deterioration of impurities in the dirty oil during the heating process is avoided.

[0014] In the above-mentioned cleaning machine filter system, a gas source is connected to the oil collecting pipe, a gas control valve is arranged between the gas source and the oil collecting pipe, and an oil outlet control valve is arranged at the oil outlet end of the oil collecting pipe. When the filter system stops working and the oil outlet control valve is closed, the permeable filter cartridge can be backwashed by opening the gas control valve and using the gas source. By introducing reverse flushing, the impurities blocked in the pores of the filter cartridge can be blown off, so that the flux and filtering capacity are restored. The traditional manual and consumable costs are avoided.

[0015] In the above cleaning machine filter system, the permeation waiting area is further provided with a spray cleaner above the oil collecting pipe, the spray cleaner is connected with the oil outlet, a clean oil pump and a spray control valve are connected between the oil outlet and the spray cleaner, and the secondary precipitation area is provided with a second heating unit. The spray medium of the spray cleaner is clean oil filtered by the system itself, which is directly branched from the oil outlet, avoiding the risk of oil emulsification, chemical reaction or secondary pollution caused by using water or chemical cleaning agent.

[0016] In the above cleaning machine filter system, the oil inlet is provided below with an overflow port, and the overflow port is connected with the magnetic separator through a backflow pipeline. The secondary precipitation area is provided at one end with an oil outlet, and the oil outlet is connected with the backflow pipeline through an oil discharge valve. By arranging the backflow pipeline, when the dirty oil pump of the primary filter machine temporarily exceeds the processing capacity of the secondary filter machine, the excess oil will not accumulate in the secondary filter machine to cause high liquid level or pressure surge, but will automatically return to the magnetic separator through the overflow port and the backflow pipeline for recirculation filtration.

[0017] Compared with the prior art, the cleaning machine filter system has the following advantages: 1. Good filtering effect: the multi-stage filtering structure first precipitates large particle impurities and then precisely filters small impurities, greatly improving the cleaning oil purity and ensuring stable cleaning quality. 2. High efficiency of circulation: reasonable design of the circulation system, cooperation of valves, pump bodies and monitoring components, smooth circulation of cleaning oil, improvement of continuous working capacity of the cleaning machine, reduction of cleaning oil replacement frequency and use cost. 3. Convenient maintenance: independent sludge accumulation area and pollution discharge device, convenient impurity cleaning, reduction of manual maintenance workload and time. Few consumables, precise filter element in the permeation filtration area, concentrated dirt on the outside, multiple uses after flushing, and reduction of use cost. 4. Stable filtering effect: the whole system adopts pressureless differential filtration, and the filtering system does not depend on stable external pressure difference, avoiding the risk of sudden drop of filtering effect or damage of equipment caused by sudden change of pressure difference. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram provided by the present application.

[0019] Figure 2 is a structural schematic diagram of a primary filter machine provided by the present application.

[0020] Figure 3 is a structural schematic diagram of an oil return flow guide area provided by the present application.

[0021] Figure 4 is a structural schematic diagram of a secondary filter machine provided by the present application.

[0022] Figure 5 is a flow process schematic diagram provided by the present application.

[0023] In the diagram, the components are: 1. Cleaning machine; 11. Oil return end; 12. Oil inlet end; 121. Flow regulating valve; 122. Flow meter; 123. Manual main valve; 2. Magnetic separator; 21. Iron chip separation roller; 22. Chip discharge bucket; 3. Primary filter; 3. Oil return guide zone; 31. Detour-shaped guide unit; 311. Guide channel; 312. Flow port; 313. Oil return stabilization zone; 32. Plate filter unit; 33. Filter plate; 331. Primary sedimentation zone; 34. Dirty oil pump; 341. Suction filter; 342. One-way valve; 343. Dirt separation unit; 35. Dirt separation plate; 352. Porous partition plate; 4. Secondary filter; 41. Secondary sedimentation zone; 411. Sewage collection bin; 412. Oil discharge port; 413. Oil discharge valve; 42. Permeation waiting area; 421. Permeation filter unit. Oil collection pipe 422, permeable filter element 423, oil outlet control valve 424, honeycomb oil-sedimentation unit 43, oil filter 431, oil passage 432, oil outlet interface 44, manual oil outlet valve 441, oil inlet interface 45, vertical oil delivery passage 451, overflow port 452, return pipeline 453, sewage pipe 46, sewage valve 461, sludge oil tank 462, clean oil area 47, spray cleaner 48, clean oil pump 481, spray control valve 482, spray head 483, air source 5, air control valve 51, air storage tank 52, air combination element 53, air source valve 54, first liquid level controller 611, second liquid level controller 612, third liquid level controller 613, first heating unit 621, second heating unit 622. Detailed Implementation

[0024] like Figures 1 to 5 As shown, the filtration system of this cleaning machine includes a magnetic separator 2, a primary filter 3, and a secondary filter 4, which are connected in sequence between the oil return end 11 and the oil inlet end 12 of the cleaning machine 1. The primary filter 3 is provided with an oil return guide zone 31, which is provided with a meandering guide unit 311. The oil outlet of the magnetic separator 2 is connected to the meandering guide unit 311. The oil return guide zone 31 is connected to the primary sedimentation zone 34 through the oil return stabilization zone 32 and the plate filter unit 33 in sequence. The secondary filter 4 is equipped with a secondary sedimentation zone 41 and a permeation waiting zone 42. The secondary sedimentation zone 41 is connected to the primary sedimentation zone 34 and can receive the liquid flowing out of the primary sedimentation zone 41. A honeycomb oil-water separation unit 43 is provided between the secondary sedimentation zone 41 and the permeation waiting zone 42. The permeation waiting zone 42 is equipped with a permeation filter unit 421, which is connected to the oil outlet 44 leading to the oil inlet 12 of the cleaning machine 1.

[0025] In this embodiment, the ferromagnetic impurities are removed by the magnetic separator 2, the medium-precision filtration and preliminary precipitation are performed by the primary filter 3, and the fine filtration and final purification are performed by the secondary filter 4, so that the multi-stage filtration in series achieves higher filtration precision.

[0026] The oil in the primary filter 3 is preliminarily separated by the circuitous flow guide unit 311, and then the oil from the oil return flow guide area 31 is received by the oil return flow stabilization area 32, and then the oil is intercepted and filtered by the sheet filter unit 33 after being stabilized, and finally the remaining fine particles in the oil are lastly deposited by the primary deposition area 34, so that the preliminary purification effect is achieved.

[0027] The oil from the primary filter 3 is again deposited in the secondary deposition area 41. The honeycomb oil flow and dirt separation unit 43 makes the impurity particles more easily separated from the oil and settled at the bottom when passing through the inclined channel due to the influence of gravity and the change of flow direction. Then the oil enters the final permeable filter unit 421 to remove the fine suspended particles, so that the oil finally achieves the cleaning effect of high cleanliness standard.

[0028] As shown in Figure 5 The magnetic separator 2 is provided with a scrap iron separation roller 21 for discharging the accumulated scrap iron in the magnetic separator 2 into a scrap iron discharge bucket 22. The scrap iron separation roller 21 is automatically started when the system runs for five minutes, and is automatically stopped after being continuously started for 30 seconds. The specific structure of the magnetic separator 2 is prior art.

[0029] More specifically, the circuitous flow guide unit 311 includes a flow guide channel 312 provided in the oil return flow guide area 31 and formed by three laterally distributed circuitous structures, the flow guide channel 312 is connected with the oil outlet of the magnetic separator 2, the oil outlet of the flow guide channel 312 is communicated with the oil inlet of the oil return flow stabilization area 32, and the dirt separation unit 35 capable of reducing the flow of dirt into the oil return flow stabilization area 32 is further arranged in the flow guide channel 312.

[0030] In this embodiment, the flow guide channel 312 is an S-shaped flow channel, so that the oil flows out in a specified direction and vortex is avoided.

[0031] As shown in Figure 3 The dirt separation unit 35 includes a dirt separation plate 351 arranged at the bending position, the lower end of the dirt separation plate 351 is integrated with the bottom of the oil return flow guide area 31, and the upper end of the dirt separation plate 351 forms a flow passage 313 communicated with the inlet and outlet of the circuitous structure between the dirt separation plate 351 and the flow guide channel 312, and a porous partition plate 352 is arranged at the outlet of each circuitous structure.

[0032] More specifically, the oil inlet of the oil return flow stabilization area 32 is in a strip shape and is arranged horizontally, and the oil outlet of the oil return flow stabilization area 32 is provided with a partition; The sheet filter unit 33 comprises a plurality of filter sheets 331 distributed from the oil outlet to the oil inlet.

[0033] More specifically, the primary precipitation zone 34 is arranged at one end of the oil return flow guide zone 31 and the oil return flow stabilizing zone 32, the sheet filter unit 33 is arranged at one side of the oil return flow stabilizing zone 32 and between the oil return flow stabilizing zone 32 and the primary precipitation zone 34, and the primary precipitation zone 34 is provided with a dirty oil pump 341, and the dirty oil pump 341 is provided with an oil suction filter 342 at the oil suction port at the lower end.

[0034] In this embodiment, the dirty oil pump 341 is provided with a one-way valve 343 on the pipeline connected to the oil inlet interface 45 of the secondary filter 4 to prevent oil from flowing from the oil inlet interface 45 to the primary precipitation zone 34. The primary precipitation zone 34 is provided with a first liquid level controller 611, which automatically starts the dirty oil pump 341 when the liquid level reading is normal, and stops the dirty oil pump 341 when the liquid level reading is too low.

[0035] More specifically, the honeycomb oil passing and dirt precipitating unit 43 comprises an oil passing device 431, a plurality of vertically inclined oil passing channels 432 are arranged on the oil passing device 431 in a honeycomb pattern, one end of the secondary precipitation zone 41 is communicated with the oil inlet interface 45 at the top through a vertical oil passing channel 451, a plurality of dirt collection bins 411 are arranged at the bottom of the secondary precipitation zone 41 at the lower end of the oil passing channel 432, the dirt collection bins 411 are communicated with the dirt discharge pipeline 46, and a permeable filter unit 421 is arranged above the oil passing channel 432.

[0036] In this embodiment, the dirt discharge pipeline 46 is provided with a dirt discharge control valve 461, which is opened after actively sending a dirt discharge signal to discharge the waste in the dirt collection bin 411 to the dirty oil tank 462, and the dirt discharge valve is automatically closed after 30 seconds of continuous dirt discharge.

[0037] More specifically, the permeable filter unit 421 comprises at least one oil collecting pipe 422 arranged transversely, a plurality of permeable filter cartridges 423 are arranged along the axial direction of the oil collecting pipe 422, one end of the oil collecting pipe 422 is closed, and the other end is communicated with the clean oil zone 47, the clean oil zone 47 is provided with a first heating unit 621, and the clean oil zone 47 is connected with an oil outlet interface 44.

[0038] In this embodiment, the oil passes through the permeable filter cartridges 423 to the clean oil zone 47 with zero pressure difference, ensuring the filtering precision. The oil outlet interface 44 is provided with a manual oil outlet valve 441, the manual oil outlet valve 441 is connected to the oil inlet end 12 of the cleaning machine 1 through a pipeline, and a flow adjusting valve 121, a flow meter 122 and a manual total valve 123 are arranged in sequence on the pipeline to control the flow size.

[0039] As Figure 5As shown, a third liquid level controller 613 is also provided in the clean oil zone 47. When the liquid level reading of the third liquid level controller 613 reaches the corresponding reading, the filtered clean oil will be delivered to the oil inlet 12 of the cleaning machine 1.

[0040] The oil purification zone 47 is also equipped with a first heating unit 621. Heating is turned on when the oil temperature in the oil purification zone 47 is greater than 35°C and turned off when it is less than 45°C, so as to control the oil temperature between 35-45°C and ensure the uniformity of the product oil film thickness.

[0041] More specifically, an air source 5 is connected to the oil collection pipe 422, and an air control valve 51 is provided between the air source 5 and the oil collection pipe 422. An oil outlet control valve 424 is provided at the oil outlet end of the oil collection pipe 422.

[0042] In this embodiment, the air source 5 includes an air storage tank 52, and an air combination element 53 is connected to the air storage tank 52 to store high-pressure outside air inside the air storage tank 52. The air combination element 53 is existing technology, and the air inlet end of the air combination element 53 is equipped with a manual air source valve 54. Whether the system is online or in standby mode, the air control valve 51 automatically opens every 30 minutes, allowing high-compressed air from the air storage tank 52 to enter the oil collection pipe 422 to backwash the permeable filter element 423. The backwashing lasts for one minute and then automatically closes. When backwashing is not required, the air source valve 54 can be closed, at which point the gas pressure in the air storage tank 52 decreases, stopping the backwashing process.

[0043] More specifically, the permeation waiting area 42 is also equipped with a spray cleaner 48 located above the oil collection pipe 422. The spray cleaner 48 is connected to the oil outlet port 44. A clean oil pump 481 and a spray control valve 482 are connected between the oil outlet port 44 and the spray cleaner 48. A second heating unit 622 is provided in the secondary sedimentation area 41.

[0044] like Figure 4 The second heating unit 622 in the secondary sedimentation zone 41 shown is arranged in the lower part of the oil passer 431. The ring arrangement makes the heating uniform. The heating is turned on when the oil temperature is greater than 30°C and turned off when it is less than 40°C. The temperature is controlled between 30-40°C to reduce the oil viscosity and accelerate the sedimentation process.

[0045] In this embodiment, in the standby state, after backwashing is completed, the spray control valve 482 is opened, and the clean oil pump 481 draws the clean oil from the oil outlet 44 into the permeation waiting area 42 and sprays it through multiple spray heads 483 for cleaning. The spray cleaning can not only clean the surface of the permeation filter element 423, but also accelerate sedimentation and clean the oil passage 432.

[0046] More specifically, an overflow port 452 is provided below the oil inlet port 45, and the overflow port 452 is connected to the magnetic separator 2 through the return pipe 453; The secondary precipitation zone 41 is provided with an oil discharge interface 412 at one end, which is connected with a return pipeline 453 through an oil discharge valve 413.

[0047] In this embodiment, the second liquid level controller 612 is arranged in the vertical oil feeding channel 451. When the liquid level reading of the second liquid level controller 612 is too high, the oil discharge valve 413 is opened to make the oil cleaned by spraying return to the magnetic separator 2 for filtration again, realizing recycling.

[0048] The working principle of this embodiment is that the oil flows out of the oil return end 11 of the cleaning machine 1, first enters the magnetic separator 2. The magnetic separator 2 adsorbs and removes the ferromagnetic impurities in the oil, and collects the iron filings into the iron chip collection barrel 22 through the iron chip separation roller 21, realizing the preliminary separation of large particle metal impurities.

[0049] The oil treated by the magnetic separator 2 enters the oil return flow area 31 of the primary filter 3. The oil flows in the flow guide channel 312 of the meandering flow guide unit 311, which is designed in a meandering shape, increasing the oil path and residence time, so that the heavy impurities are settled under the action of gravity. The dirt prevention plate 351 and the porous partition plate 352 of the dirt prevention unit 35 prevent the settled dirt from being rolled up again, ensuring that the oil entering the next stage is cleaner.

[0050] The oil enters the oil return steady flow area 32 from the oil return flow area 31. The strip-shaped transverse oil inlet of the oil return steady flow area 32 makes the oil distribute evenly and stably, creating stable conditions for subsequent filtration. Then the oil passes through the filter sheet 331 of the sheet type filter unit 33, further intercepting impurities.

[0051] The oil passing through the sheet type filter unit 33 enters the primary precipitation area 34 for static precipitation, removing finer suspended particles. The dirty oil pump 341 in the primary precipitation area 34 sucks the preliminarily purified oil through the oil suction filter 342 at its lower end, and pumps it to the secondary filter 4 through the pipeline. The one-way valve 343 prevents the oil from flowing back.

[0052] The oil enters the secondary precipitation area 41 of the secondary filter 4 through the oil inlet interface 45. The oil first precipitates again in the secondary precipitation area 41, and then flows upward through the oil flow channel 432 of the honeycomb type oil flow dirt collection unit 43. These inclined honeycomb channels increase the collision opportunities of impurities with the wall surface, prompting the impurities to slide and settle in the dirt collection bin 411 at the bottom, which is discharged through the dirt discharge pipeline 46.

[0053] The oil preliminarily purified by the honeycomb type oil flow dirt collection unit 43 enters the permeation waiting area 42, and then is finely filtered by the permeation type filter element 423 of the permeation type filter unit 421 under zero pressure difference condition. The clean oil permeates into the oil collection pipeline 422 and is collected in the clean oil area 47.

[0054] The first heating unit 621 in the clean oil area 47 heats the clean oil to a temperature of 35-45°C to reduce the viscosity and ensure uniformity of the oil film thickness. The heated clean oil is returned to the oil inlet 12 of the cleaning machine 1 through the oil outlet interface 44, the manual oil outlet valve 441, the flow adjustment valve 121, the flow meter 122, and the manual total valve 123, completing a filtration cycle.

[0055] The system has an automatic backwashing function that works continuously offline and online. The air source 5 injects compressed air into the oil collection pipe 422 through the control valve 51 to backwash the permeable filter element 423, remove attached impurities, and restore the performance of the filter element.

[0056] The system also has a spray cleaning function. In standby state, the clean oil pump 481 can extract clean oil from the oil outlet interface 44 and spray the permeable waiting area 42 through the spray head 483 of the spray cleaner 48 to clean the surface of the permeable filter element 423 and the oil passage 432.

[0057] The system is designed with overflow and backflow mechanisms. When the liquid level in the secondary filter 4 is too high or when it is necessary to recover the oil after spray cleaning, the overflow port 452 or the oil outlet interface 412 cooperates with the oil outlet valve 413 to guide the excess oil back to the magnetic separator 2 through the backflow pipeline 453 for re-filtration, realizing internal circulation.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0059] Although the terms cleaning machine, oil return end, oil inlet end, flow adjusting valve, flow meter, manual total valve, magnetic separator, iron separator roller, iron removal barrel, primary filter, oil return flow guide area, meandering flow guide unit, flow guide passage, flow passage, oil return flow stabilizing area, sheet type filter unit, filter sheet, primary sedimentation area, dirty oil pump, oil suction filter, one-way valve, dirt separation unit, dirt separation plate, porous separation plate, secondary filter, secondary sedimentation area, dirt removal storage bin, oil removal interface, oil removal valve, permeation waiting area, permeation type filter unit, oil collection pipe, permeation type filter cartridge, oil outlet control valve, honeycomb type oil passing and dirt settling unit, oil passer, oil passing passage, oil outlet interface, manual oil outlet valve, oil inlet interface, vertical oil feeding passage, overflow, backflow pipe, dirt removal pipe, dirt removal valve, dirty oil barrel, clean oil area, spray cleaner, clean oil pump, spray control valve, spray head, air source, air control valve, air storage tank, air combination element, air source valve, first liquid level controller, second liquid level controller, third liquid level controller, first heating unit, second heating unit, etc. are used more frequently in the description, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application, and any interpretation of them as an additional limitation is contrary to the spirit of the present application.

Claims

1. A cleaning machine filtration system, characterized by, The oil cleaning machine comprises a magnetic separator (2), a first filter (3) and a second filter (4) which are sequentially connected between an oil return end (11) and an oil inlet end (12) of the oil cleaning machine (1). The first filter (3) is internally provided with an oil return flow guide area (31), the oil return flow guide area (31) is internally provided with a meandering flow guide unit (311), an oil outlet of the magnetic separator (2) is communicated with the meandering flow guide unit (311), and the oil return flow guide area (31) is sequentially communicated with the primary sedimentation area (34) through an oil return flow stabilizing area (32) and a sheet type filter unit (33). The second filter (4) is internally provided with a secondary sedimentation area (41) and a permeation waiting area (42), the secondary sedimentation area (41) is connected with the primary sedimentation area (34) and can receive liquid flowed out of the primary sedimentation area (34), a honeycomb type oil flow sedimentation unit (43) is arranged between the secondary sedimentation area (41) and the permeation waiting area (42), and the permeation waiting area (42) is internally provided with a permeation type filter unit (421), the permeation type filter unit (421) is connected with an oil outlet interface (44) leading to the oil inlet end (12) of the oil cleaning machine (1).

2. The washer filtration system of claim 1, wherein, The meandering flow guide unit (311) comprises a flow guide channel (312) formed by N meandering structures distributed in the oil return flow guide area (31), N is greater than or equal to 1, an oil inlet of the flow guide channel (312) is connected with an oil outlet of the magnetic separator (2), an oil outlet of the flow guide channel (312) is communicated with an oil inlet of the oil return flow stabilizing area (32), and a dirt separation unit (35) capable of reducing dirt flowing into the oil return flow stabilizing area (32) is further arranged in the flow guide channel (312).

3. The washer filtration system of claim 2, wherein, The dirt separation unit (35) comprises a dirt separation plate (351) arranged at a bending position, the lower end of the dirt separation plate (351) is integrally connected with the bottom of the oil return flow guide area (31), the upper end of the dirt separation plate (351) and the flow guide channel (312) form a flow passage (313) connecting the inlet and outlet of the meandering structure, and a porous separation plate (352) is arranged at the outlet of each meandering structure.

4. The rinser filter system of claim 3, wherein, The oil inlet of the oil return flow stabilizing area (32) is in a strip shape and arranged horizontally, and an isolation is arranged on the oil outlet of the oil return flow stabilizing area (32). The sheet type filter unit (33) comprises a plurality of filter sheets (331) distributed from the oil outlet to the oil inlet.

5. The rinser filter system of claim 1, wherein, The primary sedimentation area (34) is arranged at one end of the oil return flow guide area (31) and the oil return flow stabilizing area (32), the sheet type filter unit (33) is arranged at one side of the oil return flow stabilizing area (32) and between the oil return flow stabilizing area (32) and the primary sedimentation area (34), the primary sedimentation area (34) is internally provided with a dirty oil pump (341), and an oil suction filter (342) is arranged on the lower end of the oil suction port of the dirty oil pump (341).

6. The cleaning machine filtration system of any of claims 1-5, wherein, The honeycomb type oil passing dirt unit (43) comprises an oil passing device (431) with a plurality of vertically inclined bottom surfaces and honeycomb type distribution oil passing channels (432) on the oil passing device (431), one end of the secondary precipitation area (41) is communicated with the top oil inlet interface (45) through the vertical oil feeding channel (451), the bottom of the secondary precipitation area (41) is provided with at least one dirt collection bin (411) at the lower end of the oil passing channel (432), the dirt collection bin (411) is communicated with the dirt pipe (46), and the oil passing channel (432) is provided with the permeable type filter unit (421) above.

7. The rinser filter system of claim 6, wherein, The permeable type filter unit (421) comprises at least one transversely arranged oil collecting pipe (422), a plurality of permeable filter cores (423) are arranged on the oil collecting pipe (422) in the axial direction, one end of the oil collecting pipe (422) is closed, and the other end is communicated with the clean oil area (47), the clean oil area (47) is provided with a first heating unit (621), and the clean oil area (47) is connected with the oil outlet interface (44).

8. The rinser filter system of claim 7, wherein, The oil collecting pipe (422) is connected with the gas source (5), a gas control valve (51) is arranged between the gas source (5) and the oil collecting pipe (422), and the oil outlet end of the oil collecting pipe (422) is provided with an oil outlet control valve (424).

9. The rinser filter system of claim 8, wherein, The permeable waiting area (42) is further provided with a spray cleaner (48) above the oil collecting pipe (422), the spray cleaner (48) is connected with the oil outlet interface (44), the oil outlet interface (44) and the spray cleaner (48) are connected with a clean oil pump (481) and a spray control valve (482), and the secondary precipitation area (41) is provided with a second heating unit (622).

10. The rinser filter system of claim 9, wherein, The oil inlet interface (45) is provided with an overflow port (452) below, the overflow port (452) is connected with the magnetic separator (2) through the backflow pipeline (453); One end of the secondary precipitation area (41) is provided with an oil outlet interface (412), and the oil outlet interface (412) is connected with the backflow pipeline (453) through an oil outlet valve (413).

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