Multi-stage filtering device

Abstract

The invention relates to the technical field of sump oil treatment, and discloses a multi-stage filtering device which comprises a rolling mill system, a waste oil tank and a clean oil tank, a first sewage pumping pipe fitting is installed between the rolling mill system and the waste oil tank, and a first oil pumping pipe fitting is installed between the rolling mill system and the clean oil tank; a first filtering unit, a second-stage precipitation unit, a storage unit, a second filtering unit, a fourth-stage precipitation unit and a fifth-stage precipitation unit are arranged between the waste oil tank and the clean oil tank. According to the multi-stage filtering device, the first filtering unit, the second-stage precipitation unit, the storage unit, the second filtering unit, the fourth-stage precipitation unit and the fifth-stage precipitation unit are arranged to form the multi-stage filtering device, and the multi-stage filtering device is subsequently combined with a rolling mill system, a waste oil tank and a clean oil tank for use; the composite filtering treatment effect of not less than two-stage filtering and five-stage precipitation can be achieved on sludge, the recycling rate of purified oil is increased, meanwhile, oil sludge can be filtered stage by stage and collected in a unified mode, and the operation effect of the whole device is fully optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dirty oil treatment, in particular to a multi-stage filtering device. BACKGROUND

[0002] Strip steel is a kind of narrow and long steel plate produced by various steel rolling enterprises to meet the needs of various industrialized production of metal or mechanical products in different industrial departments, also known as steel strip, the structural width is within 1300mm, the length is slightly different according to the size of each roll, and is commonly used for manufacturing welded pipes, clamps, gaskets, spring sheets, saw blades, blade mechanical parts production, and has a wide range of applications.

[0003] At present, in the process of strip rolling, a large amount of oil is used for rapid cooling or other purposes, and for the generated dirty oil, the existing technology usually adopts three-stage sedimentation treatment, and the oil after three-stage sedimentation can also be pumped back to the production system for reuse by using the existing pump delivery device, and the sedimented oil sludge is stored in a temporary storage tank, waiting for factory treatment, however, the applicant found that there is still a certain amount of usable oil in the remaining oil sludge during actual operation, which should be that the three-stage sedimentation treatment is not complete, and if this continues, it will inevitably lead to waste and increase production cost. SUMMARY

[0004] Technical problem In view of the defects of the prior art, the present application provides a multi-stage filtering device, which solves the problems raised in the background art.

[0005] Technical scheme To achieve the above purpose, the present application provides the following technical scheme: a multi-stage filtering device, comprising a rolling mill system, a waste oil tank and a clean oil tank, a first pump dirty pipe element is installed between the rolling mill system and the waste oil tank, a first pump oil pipe element is installed between the rolling mill system and the clean oil tank, a first filtering unit, a two-stage sedimentation unit, a storage unit, a second filtering unit, a four-stage sedimentation unit and a five-stage sedimentation unit are arranged between the waste oil tank and the clean oil tank, transition pump dirty pipe elements are installed between the first filtering unit and the waste oil tank, between the first filtering unit and the two-stage sedimentation unit, between the two-stage sedimentation unit and the second filtering unit, between the second filtering unit and the storage unit, between the storage unit and the four-stage sedimentation unit, and between the five-stage sedimentation unit and the four-stage sedimentation unit; The transition pump oil pipe is arranged between the first filter unit and the second filter unit, the oil return pump pipe is arranged between the four-stage precipitation unit and the two-stage precipitation unit, between the five-stage precipitation unit and the two-stage precipitation unit, and between the two-stage precipitation unit and the second filter unit, the dirty oil output from the waste oil tank can be filtered and purified by the first filter unit and the second filter unit, and can be precipitated and purified by the two-stage precipitation unit, the storage unit, the four-stage precipitation unit and the five-stage precipitation unit, and the purified oil in the first filter unit, the two-stage precipitation unit, the storage unit, the second filter unit, the four-stage precipitation unit and the five-stage precipitation unit can flow back to the clean oil tank.

[0006] Preferably, the first pump dirty pipe and the transition pump dirty pipe are the same in structure and are composed of a first pipe body connected with a first sludge pump and a first sludge pump input end and a first sludge pump output end, and a first valve is arranged on the first pipe body. The first pump oil pipe and the oil return pump pipe are the same in structure and are composed of a second pipe body connected with a first oil pump and a first oil input end and a first oil output end, and a second valve is arranged on the second pipe body.

[0007] Preferably, the two-stage precipitation unit comprises a first-stage precipitation tank, a second-stage precipitation tank and a third-stage precipitation tank, a first electromagnetic valve pipe is arranged between the first-stage precipitation tank and the second-stage precipitation tank and between the second-stage precipitation tank and the third-stage precipitation tank, and a first floating ball liquid level meter is arranged in each of the first-stage precipitation tank, the second-stage precipitation tank and the third-stage precipitation tank. The storage unit is composed of two storage tanks, and a second floating ball liquid level meter is arranged in each of the storage tanks. The four-stage precipitation unit is composed of four first-stage precipitation tanks, a second electromagnetic valve pipe is arranged between adjacent two first-stage precipitation tanks, and a third floating ball liquid level meter is arranged in each of the four first-stage precipitation tanks. The five-stage precipitation unit comprises two second-stage precipitation tanks, each of which is provided with a sludge discharge pipe, and a fourth floating ball liquid level meter is arranged in each of the two second-stage precipitation tanks.

[0008] Preferably, a pump delivery anti-blocking assembly is arranged on the outside of the two-stage precipitation unit, the pump delivery anti-blocking assembly comprises a circulating pipe, a circulating pump and three adjusting valve pipes, one end of each of the three adjusting valve pipes is connected to the circulating pipe, and the other end of each of the three adjusting valve pipes is connected to the first-stage precipitation tank, the second-stage precipitation tank and the third-stage precipitation tank one by one. The output end and the input end of the circulating pump are both in communication with the circulating pipe, and the circulating pump can adjust the pump delivery of the first-stage precipitation tank, the second-stage precipitation tank and the third-stage precipitation tank one by one through the circulating pipe and the three adjusting valve pipes.

[0009] Preferably, the first filter unit and the second filter unit are both provided with a filter box assembly, the filter box assembly comprises a filter box, a flow guide cylinder installed at the bottom of the filter box, and a support, the bottom of the filter box is provided with a first electronic liquid level meter, a plurality of drainage valve pipes are installed between the bottom of the filter box and the top of the flow guide cylinder, both ends of the flow guide cylinder are provided in a closed structure, and one end of the flow guide cylinder can be sleeved with the pipe body end of the corresponding transition pump dirty pipe element. The top of the filter box is sleeved with a filter plate element and a fixed H-shaped transition pipe, the middle inner side of the filter plate element is clamped with one end of the H-shaped transition pipe, and one end of the H-shaped transition pipe is connected with the pipe body end of the corresponding first pump dirty pipe element or the pipe body end of the transition pump dirty pipe element.

[0010] Preferably, the top of the filter box is provided with an electric push rod capable of driving connection with the filter plate element, the filter plate element is composed of a filter frame and a filter screen fixedly nested in the filter frame, the filter frame is clamped in the inside of the filter box, and the output end of the electric push rod can penetrate through the top structure of the filter box and be drivingly connected with the top of the filter frame. A guide rod is clamped in the inside of the filter frame, one end of the guide rod is fixed on the inner wall of the bottom of the filter box, an oil outlet pipe is connected with the top of the filter frame, a plurality of liquid inlet holes are formed in the inner wall of one end of the oil outlet pipe, and the other end of the oil outlet pipe penetrates through the filter box and is connected with the pipe body end of the corresponding transition pump oil pipe element or the pipe body end of the oil return pump pipe element.

[0011] Preferably, the two second sedimentation tank structures are the same and each comprises a sedimentation tank body and a support installed at the bottom of the sedimentation tank body, the sedimentation tank body is sleeved with a conveying belt, the conveying belt is frictionally driven by a transmission shaft on both sides, one end of each of the two transmission shafts is sleeved with a bearing and a sealing ring and extends to the outside of the bottom of the sedimentation tank body. A plurality of scrapers are installed on the surface of the conveying belt along the circumferential structure of the conveying belt, and the bottom of the scraper is in contact with the inner wall of the bottom of the sedimentation tank body.

[0012] Preferably, the top of the support is provided with a bevel gear box, a double-shaft motor, a first gear, and a second gear, the input end of the bevel gear box is drivingly connected with one end of one of the transmission shafts, the first gear and the second gear are in meshing transmission, one end of the first gear and one end of the second gear are respectively drivingly connected with the input end of the bevel gear box and the output end of one side of the double-shaft motor, and a support seat is installed between the surface of the housing of the double-shaft motor and the bottom surface of the sedimentation tank body and between the surface of the housing of the bevel gear box and the bottom surface of the sedimentation tank body.

[0013] Preferably, both sides of the bottom of the sediment tank body are sleeved with a conical guide pipe, the bottom of the conical guide pipe is connected with a blowdown pipe, one end of the blowdown pipe is sleeved with a dust cover capable of being drivingly connected with the corresponding output end of the double-shaft motor, and a sealing ring is installed on the structure of the output end of the storage unit and the blowdown pipe.

[0014] Preferably, the inside of the conveying belt is sleeved with a filling baffle installed on the inner wall of the middle part of the sediment tank body, and both ends of the filling baffle are provided with arc surfaces capable of being clamped with the transmission shafts. A cleaning plate is installed on the surface of the conveying belt, a plurality of rubber brush strips capable of abutting against the inner wall of the bottom of the sediment tank body are fixed to the bottom of the cleaning plate, rubber brush strips are installed on the corner structure on one side of the sediment tank body, and a dust cover is movably installed on the top of the sediment tank body.

[0015] Beneficial effects The application provides a multi-stage filtering device, which has the following beneficial effects: 1. The multi-stage filtering device is formed by the first filtering unit, the secondary sedimentation unit, the storage unit, the second filtering unit, the fourth sedimentation unit and the fifth sedimentation unit, and can realize not less than two-stage filtering and five-stage sedimentation composite filtering treatment effect on sludge after being combined with a rolling mill system, a waste oil tank and a clean oil tank, thereby improving the recycling rate of clean oil.

[0016] 2. The multi-stage filtering device is provided with a circulating pump, a circulation pipe and three adjusting valve pipes to form an anti-blocking mechanism, and the circulating pump can pump and prevent blocking of the first sedimentation tank, the second sedimentation tank and the third sedimentation tank one by one through the circulation pipe and the three adjusting valve pipes.

[0017] 3. The multi-stage filtering device is provided with a filtering tank assembly and a second filtering tank, and the filtering tank assembly and the second filtering tank further comprise a plurality of structures, so that the multi-stage filtering device can realize pressure filtration and automatic sludge cleaning and sludge conveying after being used. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a flowchart of the structure of the application; Figure 2 The figure is a front view of the filtering tank of the structure of the application; Figure 3 The figure is a sectional view of the filtering tank of the structure of the application; Figure 4 The figure is a right view of the filtering tank of the structure of the application; Figure 5 The figure is a top view of the filtering plate of the structure of the application; Figure 6 The figure is a front view of the sediment tank body of the structure of the application; Figure 7 is a perspective view of the structure of the sedimentation tank body of the present application; Figure 8 is a top view of the structure of the conveying belt of the present application; Figure 9 is a perspective view of the structure of the conveying belt of the present application; Figure 10 is a sectional view of the structure of the blowdown pipe of the present application.

[0019] In the figure: 1, rolling mill system; 2, waste oil tank; 3, clean oil tank; 4, first filter unit; 5, secondary sedimentation unit; 51, primary sedimentation tank; 52, secondary sedimentation tank; 53, tertiary sedimentation tank; 6, storage unit; 7, second filter unit; 8, fourth sedimentation unit; 9, fifth sedimentation unit; 10, circulation pipe; 11, circulating pump; 12, regulating valve pipe; 13, filter tank; 14, flow guide cylinder; 15, drainage valve pipe; 16, filter plate; 17, electric push rod; 18, oil outlet pipe; 19, I-shaped transition pipe; 20, guide rod; 21, sedimentation tank body; 22, support frame; 23, conveying belt; 24, transmission shaft; 25, bevel gear box; 26, double-shaft motor; 27, scraper; 28, first gear; 29, second gear; 30, cleaning plate; 31, conical guide pipe; 32, blowdown pipe; 33, rubber brush strip; 34, dustproof cover plate; 35, filling baffle. DETAILED DESCRIPTION

[0020] All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figure 1 , a multi-stage filtering device, comprising a rolling mill system 1, a waste oil tank 2, and a clean oil tank 3, a first pump dirty pipe is installed between the rolling mill system 1 and the waste oil tank 2, a first pump oil pipe is installed between the rolling mill system 1 and the clean oil tank 3, and a first filter unit 4, a secondary sedimentation unit 5, a storage unit 6, a second filter unit 7, a fourth sedimentation unit 8, and a fifth sedimentation unit 9 are arranged between the waste oil tank 2 and the clean oil tank 3, a transition pump dirty pipe is installed between the first filter unit 4 and the waste oil tank 2, between the first filter unit 4 and the secondary sedimentation unit 5, between the secondary sedimentation unit 5 and the second filter unit 7, between the second filter unit 7 and the storage unit 6, between the storage unit 6 and the fourth sedimentation unit 8, and between the fifth sedimentation unit 9 and the fourth sedimentation unit 8. The transition pump oil pipe is arranged between the clean oil tank 3 and the first filter unit 4 and the second filter unit 7, the oil return pump delivery pipe is arranged between the four-stage sedimentation unit 8 and the two-stage sedimentation unit 5, between the five-stage sedimentation unit 9 and the two-stage sedimentation unit 5, and between the two-stage sedimentation unit 5 and the second filter unit 7, and the dirty oil output from the waste oil tank 2 can be filtered and purified by the first filter unit 4 and the second filter unit 7, and can be sedimented and purified by the two-stage sedimentation unit 5, the storage unit 6, the four-stage sedimentation unit 8 and the five-stage sedimentation unit 9, and the purified oil in the first filter unit 4, the two-stage sedimentation unit 5, the storage unit 6, the second filter unit 7, the four-stage sedimentation unit 8 and the five-stage sedimentation unit 9 can be returned to the clean oil tank 3; The first pump dirty pipe and the transition pump dirty pipe are the same in structure and are both composed of a first pipe body connected with a first sludge pump and a first sludge pump input end and a first sludge pump output end, and a first valve is arranged on the first pipe body, and the first pump oil pipe and the oil return pump delivery pipe are the same in structure and are both composed of a second pipe body connected with a first oil pump and a first oil input end and a first oil output end, and a second valve is arranged on the second pipe body, so as to meet the automatic pumping and delivery requirements of clean oil and dirty oil; The two-stage sedimentation unit 5 includes a first-stage sedimentation tank 51, a second-stage sedimentation tank 52 and a third-stage sedimentation tank 53, a first electromagnetic valve pipe is arranged between the first-stage sedimentation tank 51 and the second-stage sedimentation tank 52 and between the second-stage sedimentation tank 52 and the third-stage sedimentation tank 53, and a first float ball liquid level meter is arranged in each of the first-stage sedimentation tank 51, the second-stage sedimentation tank 52 and the third-stage sedimentation tank 53, the storage unit 6 is composed of two storage tanks, and a second float ball liquid level meter is arranged in each of the storage tanks, the four-stage sedimentation unit 8 is composed of four first sedimentation tanks, a second electromagnetic valve pipe is arranged between adjacent two of the four first sedimentation tanks, and a third float ball liquid level meter is arranged in each of the four first sedimentation tanks, and the five-stage sedimentation unit 9 includes two second sedimentation tanks, each of which is provided with a sludge discharge pipe, and a fourth float ball liquid level meter is arranged in each of the two second sedimentation tanks.

[0022] In use, the dirty oil generated by the rolling mill system 1 is pumped and delivered to the waste oil tank 2, and then pumped and delivered to the first filter unit 4 through the waste oil tank 2 for filtration, after the filtration, the clean oil is pumped and delivered to the clean oil tank 3 for recycling, and the filtered dirty oil is then pumped and delivered to the first-stage sedimentation tank 51 in the two-stage sedimentation unit 5, and after the first-stage sedimentation tank 51 is filled, the dirty oil is sequentially pumped and delivered to the second-stage sedimentation tank 52 and the third-stage sedimentation tank 53, so as to be subjected to two-stage sedimentation treatment by the two-stage sedimentation unit 5, after the two-stage sedimentation treatment is completed, the clean oil generated is delivered to the second filter unit 7 for re-filtering, and the clean oil generated after the re-filtering is pumped and delivered to the clean oil tank 3; The dirty oil after the precipitation of the secondary precipitation unit 5 and the dirty oil after the filtration of the second filtration unit 7 are sent to the storage unit 6 for transition, and then are pumped and sent to the fourth precipitation unit 8 through the storage unit 6, for fourth precipitation, and the clean oil is pumped and sent to the secondary precipitation unit 5, and is precipitated and filtered again through the secondary precipitation unit 5 and the second filtration unit 7, and then is pumped and sent to the clean oil tank 3, and the dirty oil after the precipitation of the fourth precipitation unit 8 is finally pumped and sent to the fifth precipitation unit 9, after the fifth precipitation, the clean oil is pumped and sent to the secondary precipitation unit 5, and is precipitated and filtered again through the secondary precipitation unit 5 and the second filtration unit 7, and then is pumped and sent to the clean oil tank 3, so as to realize the full filtration and recycling of the dirty oil.

[0023] Please refer to Figure 1 The outer side of the secondary precipitation unit 5 is provided with a pump anti-blocking assembly, the pump anti-blocking assembly comprises a circulating pipe 10, a circulating pump 11 and three adjusting valve pipes 12, one end of the three adjusting valve pipes 12 is connected to the circulating pipe 10, and the other end of the three adjusting valve pipes 12 is connected to the first precipitation tank 51, the secondary precipitation tank 52 and the third precipitation tank 53 one by one. The output end and the input end of the circulating pump 11 are in communication with the circulating pipe 10, and the circulating pump 11 can pump and prevent the blockage of the first precipitation tank 51, the secondary precipitation tank 52 and the third precipitation tank 53 one by one through the circulating pipe 10 and the three adjusting valve pipes 12.

[0024] In use, considering that the secondary precipitation unit 5 as a preliminary precipitation device is prone to blockage, the circulating pump 11 is started once every 2 hours and the three adjusting valve pipes 12 are opened in turn during the operation process, so that the sludge at the bottom of the first precipitation tank 51, the sludge at the bottom of the secondary precipitation tank 52 and the sludge at the bottom of the third precipitation tank 53 are pumped out in turn, so as to avoid blockage due to precipitation and solidification, and the time of the first precipitation tank 51, the secondary precipitation tank 52 and the third precipitation tank 53 pumped by the circulating pump is set to 15s, 10s and 5s respectively.

[0025] Please refer to Figures 2-5 The first filtration unit 4 and the second filtration unit 7 are both provided with a filter box assembly, the filter box assembly comprises a filter box 13, a flow guide cylinder 14 installed at the bottom of the filter box 13 and a support, the bottom of the filter box 13 is provided with a first electronic liquid level meter, a plurality of drainage valve pipes 15 are installed between the bottom of the filter box 13 and the top of the flow guide cylinder 14, both ends of the flow guide cylinder 14 are provided in a closed structure, and one end of the flow guide cylinder 14 can be sleeved with the pipe body end of the corresponding transition pump dirty pipe. The top of the filter box 13 is sleeved with a filter plate 16 and a fixed sleeve-shaped transition pipe 19, respectively, and the middle inside of the filter plate 16 is clamped with one end of the sleeve-shaped transition pipe 19, and one end of the sleeve-shaped transition pipe 19 is connected with the pipe body end of the corresponding first pump dirty pipe or the pipe body end of the transition pump dirty pipe; The top of the filter box 13 is provided with an electric push rod 17 capable of driving connection with the filter plate 16, and the filter plate 16 is composed of a filter frame and a filter screen fixedly nested in the filter frame, the filter frame is clamped in the inside of the filter box 13, and the output end of the electric push rod 17 can penetrate through the top structure of the filter box 13 and is drivingly connected with the top of the filter frame; The filter frame is clamped with a guide rod 20, one end of the guide rod 20 is fixed on the bottom inner wall of the filter box 13, the top of the filter frame is connected with an oil outlet pipe 18, and a plurality of liquid inlet holes are formed in the inner wall of one end of the oil outlet pipe 18, the other end of the oil outlet pipe 18 penetrates through the filter box 13 and is connected with the pipe body end of the corresponding transition pump oil pipe or the pipe body end of the oil return pump delivery pipe.

[0026] In use, in order to ensure the filtering effect, the dirty oil to be filtered can be automatically lowered by starting the electric push rod 17, the filter plate 16 and the oil outlet pipe 18 driven by the output end of the electric push rod 17, and then the filter plate 16 is used to pressurize and filter the dirty oil in the inside of the filter box 13, and then the dirty oil and clean oil are quickly separated, and in the subsequent pumping process, the drainage valve pipe 15 is opened, the dirty oil enters the flow guide cylinder 14 for the next step of pumping, and at the same time, the clean oil can be pumped through the oil outlet pipe 18.

[0027] Please refer to Figures 6-10 , two second sedimentation tank structures are the same and each includes a sedimentation tank body 21, a support frame 22 installed at the bottom of the sedimentation tank body 21, a conveying belt 23 sleeved in the inside of the sedimentation tank body 21, two drive shafts 24 frictionally drivingly connected with the two sides of the conveying belt 23, one end of each of the two drive shafts 24 being sleeved with a bearing and a sealing ring and extending to the outside of the bottom of the sedimentation tank body 21; The surface of the conveying belt 23 is circumferentially provided with a plurality of scrapers 27 which are in contact with the inner wall of the bottom of the sediment tank body 21. The top of the support frame 22 is internally provided with a bevel gear box 25, a double-shaft motor 26, a first gear 28 and a second gear 29. The input end of the bevel gear box 25 is in transmission connection with one end of one of the transmission shafts 24. The first gear 28 is in meshing transmission with the second gear 29. One end of the first gear 28 and one end of the second gear 29 are in transmission connection with the input end of the bevel gear box 25 and the output end of one side of the double-shaft motor 26 respectively. A support seat is arranged between the surface of the shell of the double-shaft motor 26 and the bottom surface of the sediment tank body 21 and between the surface of the shell of the bevel gear box 25 and the bottom surface of the sediment tank body 21. The bottom of the sediment tank body 21 is provided with a conical guide pipe 31 on both sides. The bottom of the conical guide pipe 31 is connected with a blowdown pipe 32. One end of the blowdown pipe 32 is internally provided with a dust cover 34 which is in transmission connection with the corresponding output end of the double-shaft motor 26. A sealing ring is arranged at the structure connection position between the output end of the storage unit 6 and the blowdown pipe 32 to ensure the sealing effect. The inside of the conveying belt 23 is internally provided with a filling baffle 35 which is arranged on the inner wall of the middle part of the sediment tank body 21. The two ends of the filling baffle 35 are provided with arc surfaces which are in clamping connection with the transmission shafts 24. The surface of the conveying belt 23 is provided with a cleaning plate 30. The bottom of the cleaning plate 30 is fixedly provided with a plurality of rubber brush strips 33 which are in contact with the inner wall of the bottom of the sediment tank body 21. The corner structure of one side of the sediment tank body 21 is provided with a rubber brush strip 33. The top of the sediment tank body 21 is movably provided with a dust cover 34.

[0028] In use, considering the problem that the finally generated sludge is difficult to clean, the double-shaft motor 26 is started during the sludge guiding process. The two output ends of the double-shaft motor 26 drive the corresponding dust covers 34. Then the sludge in the blowdown pipe 32 through the conical guide pipe 31 is automatically discharged in a spiral manner. At the same time, the sludge remaining in the sediment tank body 21 is automatically cleaned by the first gear 28 and the second gear 29 in meshing transmission. The bevel gear box 25 drives the corresponding transmission shaft 24. Then the transmission shaft 24 drives the conveying belt 23. The conveying belt 23 drives the plurality of scrapers 27 arranged thereon to automatically clean and realize the self-cleaning effect of the inside of the sediment tank body 21 and accelerate the sludge discharge effect.

[0029] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0030] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtering device, comprising a rolling mill system (1), a waste oil tank (2), a clean oil tank (3), a first pump dirty pipe element is installed between the rolling mill system (1) and the waste oil tank (2), and a first pump oil pipe element is installed between the rolling mill system (1) and the clean oil tank (3), characterized in that: A first filter unit (4), a second filter unit (7), a storage unit (6), a fourth filter unit (8) and a fifth filter unit (9) are arranged between the waste oil tank (2) and the clean oil tank (3), the first filter unit (4), the second filter unit (7), the storage unit (6), the fourth filter unit (8) and the fifth filter unit (9) are all provided with a transition pump sludge pipe element, and the transition pump sludge pipe element is arranged between the waste oil tank (2) and the first filter unit (4), the first filter unit (4) and the second filter unit (7), the second filter unit (7) and the storage unit (6), the storage unit (6) and the fourth filter unit (8), the fourth filter unit (8) and the fifth filter unit (9). ​ The clean oil tank (3) is provided with a transition pump oil pipe element between the first filter unit (4) and the second filter unit (7), and the fourth filter unit (8) and the second filter unit (7), the second filter unit (5) and the second filter unit (7), and the second filter unit (5) and the second filter unit (7) are all provided with an oil return pump pipe element, and the waste oil output from the waste oil tank (2) can be filtered and purified by the first filter unit (4) and the second filter unit (7), and can be precipitated and purified by the second filter unit (5), the storage unit (6), the fourth filter unit (8) and the fifth filter unit (9), and the purified oil in the first filter unit (4), the second filter unit (5), the storage unit (6), the second filter unit (7), the fourth filter unit (8) and the fifth filter unit (9) can flow back to the clean oil tank (3).

2. The multi-stage filtration device of claim 1, wherein: The first pump sludge pipe element and the transition pump sludge pipe element are the same structure and are composed of a first sludge pump and a first sludge pump input end and output end connected first pipe body, and the first pipe body is provided with a first valve; The first pump oil pipe element and the oil return pump pipe element are the same structure and are composed of a first oil pump and a first oil pump input end and output end connected second pipe body, and the second pipe body is provided with a second valve.

3. The multi-stage filtration device of claim 1, wherein: The second filter unit (5) includes a first sedimentation tank (51), a second sedimentation tank (52) and a third sedimentation tank (53), the first sedimentation tank (51) and the second sedimentation tank (52) are provided with a first electromagnetic valve pipe, and the first sedimentation tank (51), the second sedimentation tank (52) and the third sedimentation tank (53) are provided with a first float ball liquid level meter; The storage unit (6) is composed of two storage tanks, and the storage tank is provided with a second float ball liquid level meter; The fourth filter unit (8) is composed of four first sedimentation tanks, and a second electromagnetic valve pipe is arranged between adjacent two fourth filter units, and the four first sedimentation tanks are provided with a third float ball liquid level meter; The fifth filter unit (9) includes two second sedimentation tanks, and the two second sedimentation tanks are provided with a sludge discharge pipe element, and the two second sedimentation tanks are provided with a fourth float ball liquid level meter.

4. The multi-stage filtration device of claim 3, wherein: The outer side of the secondary precipitation unit (5) is provided with a pump anti-blocking assembly, the pump anti-blocking assembly comprises a circulating pipe (10), a circulating pump (11) and three adjusting valve pipes (12), one end of the three adjusting valve pipes (12) is connected to the circulating pipe (10), and the other end of the three adjusting valve pipes (12) is connected to the first precipitation tank (51), the secondary precipitation tank (52) and the third precipitation tank (53) one by one respectively; The output end and the input end of the circulating pump (11) are communicated with the circulating pipe (10), and the circulating pump (11) can pump and prevent blocking of the first precipitation tank (51), the secondary precipitation tank (52) and the third precipitation tank (53) one by one through the circulating pipe (10) and the three adjusting valve pipes (12).

5. The multi-stage filtration device of claim 1, wherein: The first filter unit (4) and the second filter unit (7) are both provided with a filter box assembly, the filter box assembly comprises a filter box (13), a flow guide cylinder (14) mounted on the bottom of the filter box (13) and a support, the bottom of the filter box (13) is provided with a first electronic liquid level meter, a plurality of drainage valve pipes (15) are mounted between the bottom of the filter box (13) and the top of the flow guide cylinder (14), both ends of the flow guide cylinder (14) are provided in a closed structure, and one end of the flow guide cylinder (14) can be sleeved with the pipe body end of the corresponding transition pump dirty pipe element; The top of the filter box (13) is sleeved with a filter plate (16) and a fixedly sleeved H-shaped transition pipe (19), the middle inner side of the filter plate (16) is clamped with one end of the H-shaped transition pipe (19), and the other end of the H-shaped transition pipe (19) is connected with the pipe body end of the corresponding first pump dirty pipe element or the pipe body end of the transition pump dirty pipe element.

6. The multi-stage filtration device of claim 5, wherein: The top of the filter box (13) is provided with an electric push rod (17) which can be transmissionally connected with the filter plate (16), the filter plate (16) is composed of a filter frame and a filter screen fixedly sleeved in the filter frame, the filter frame is clamped in the filter box (13), and the output end of the electric push rod (17) can penetrate through the top structure of the filter box (13) and is transmissionally connected with the top of the filter frame; The filter frame is clamped with a guide rod (20), one end of the guide rod (20) is fixed on the inner wall of the bottom of the filter box (13), the top of the filter frame is connected with an oil outlet pipe (18), a plurality of liquid inlet holes are formed in the inner wall of one end of the oil outlet pipe (18), and the other end of the oil outlet pipe (18) penetrates through the filter box (13) and is connected with the pipe body end of the corresponding transition pump oil pipe element or the pipe body end of the oil return pump pipe element.

7. The multi-stage filtration device of claim 3, wherein: The two secondary precipitation tanks are the same in structure and each comprises a precipitation tank body (21) and a support frame (22) mounted on the bottom of the precipitation tank body (21), the precipitation tank body (21) is sleeved with a conveying belt (23), the conveying belt (23) is frictionally transmissionally provided with a transmission shaft (24) on both sides, one end of each of the two transmission shafts (24) is sleeved with a bearing and a sealing ring with the bottom structure of the precipitation tank body (21) and extends to the outside of the bottom of the precipitation tank body (21); The surface of the conveying belt (23) is provided with a plurality of scrapers (27) along the circumferential direction of the structure, and the bottom of the scraper (27) is in contact with the inner wall of the bottom of the precipitation tank body (21).

8. The multi-stage filtration device of claim 7, wherein: The top of the support frame (22) is provided with a bevel gear box (25), a double-shaft motor (26), a first gear (28) and a second gear (29), the input end of the bevel gear box (25) is in driving connection with one end of one of the transmission shafts (24), the first gear (28) and the second gear (29) are in meshing transmission, one end of the first gear (28) and one end of the second gear (29) are respectively in driving connection with the input end of the bevel gear box (25) and the output end of one side of the double-shaft motor (26), and a support seat is installed between the surface of the housing of the double-shaft motor (26) and the bottom surface of the precipitation tank body (21), and between the surface of the housing of the bevel gear box (25) and the bottom surface of the precipitation tank body (21).

9. The multi-stage filtration device of claim 7, wherein: Both sides of the bottom of the precipitation tank body (21) are provided with a conical guide pipe (31), the bottom of the conical guide pipe (31) is connected with a blowdown pipe (32), one end of the blowdown pipe (32) is provided with a dust cover (34) which can be in driving connection with the corresponding output end of the double-shaft motor (26), and a sealing ring is installed at the structure of the output end of the storage unit (6) and the blowdown pipe (32).

10. The multi-stage filtration device of claim 7, wherein: The inside of the conveying belt (23) is provided with a filling baffle (35) which is installed on the inner wall of the middle part of the precipitation tank body (21), both ends of the filling baffle (35) are provided with an arc surface structure which can be in clamping connection with the transmission shaft (24); The surface of the conveying belt (23) is provided with a cleaning plate (30), the bottom of the cleaning plate (30) is fixed with a plurality of rubber brush strips (33) which can be in contact with the inner wall of the bottom of the precipitation tank body (21), the corner structure of one side of the precipitation tank body (21) is provided with a rubber brush strip (33), and the top of the precipitation tank body (21) is movably provided with a dust cover (34).

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