CN115434783B - Fine filter for ship lubricating oil purification system - Google Patents
Fine filter for ship lubricating oil purification system Download PDFInfo
- Publication number
- CN115434783B CN115434783B CN202211138453.1A CN202211138453A CN115434783B CN 115434783 B CN115434783 B CN 115434783B CN 202211138453 A CN202211138453 A CN 202211138453A CN 115434783 B CN115434783 B CN 115434783B
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- CN
- China
- Prior art keywords
- filter
- shell
- oil
- purification system
- sliding column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 16
- 238000000746 purification Methods 0.000 title claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 40
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 238000007664 blowing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000002657 fibrous material Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000010705 motor oil Substances 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
Abstract
The invention discloses a fine filter for a ship lubricating oil purification system, which comprises a base and a filtering shell, wherein the base is provided with a bottom plate; the filter shell consists of an upper shell and a lower shell, a first flange plate at the lower end of the upper shell is fixedly connected with a second flange plate at the upper end of the lower shell through bolts, a sealing gasket is arranged between the first flange plate and the second flange plate, a filter element is arranged in the filter shell, an oil inlet pipe is arranged on the left upper side of the upper shell, an oil outlet is arranged on the right side of the lower shell, a fixed bottom plate is arranged at the upper port position of the lower shell, a water outlet is arranged in the middle position of the fixed bottom plate, a fixed top plate is arranged at the inner top of the upper shell, a slag discharging pipe is arranged at the outer side of the lower end of the upper shell, a slag discharging valve is arranged on the slag discharging pipe, and throttle valves are arranged on the oil inlet pipe and the oil outlet; the upper end of the filter shell is also provided with a back blowing hole cleaning piece. The fine filter for the ship lubricating oil purification system can sufficiently purify engine oil in the engine oil tank and is convenient for quick replacement of the filter element.
Description
Technical Field
The invention relates to a fine filter for a ship lubricating oil purification system, and belongs to the technical field of purification equipment.
Background
According to the regulations of diesel engine manufacturers on the use of lubricating oil products: the new machine or the diesel engine after overhaul is put into operation for 50 hours for the first time, and the system lubricating oil is required to be replaced; after the machine is put into operation, oil product testing is carried out every 500h, and system lubricating oil is replaced according to oil product testing indexes. In order to save the cost expenditure of oil change and reduce the pollution of waste oil to the environment, the cause of the deterioration of lubricating oil needs to be analyzed, so that a device capable of purifying the lubricating oil needs to be researched, and the purposes of improving the technical state, prolonging the service life of the device and reducing the operation cost of ships and the production of waste oil are achieved.
Disclosure of Invention
In view of the above problems with the prior art, the present invention provides a fine filter for a marine lubrication oil purification system.
In order to achieve the above object, the present invention provides a fine filter for a marine lubrication oil purification system, comprising a base and a filter housing mounted on the upper end of the base;
The filter shell consists of an upper shell and a lower shell, a first flange plate at the lower end of the upper shell is fixedly connected with a second flange plate at the upper end of the lower shell through bolts, a sealing gasket is arranged between the first flange plate and the second flange plate, a filter element is arranged in the filter shell, an oil inlet pipe is arranged on the left upper side of the upper shell, an oil outlet is arranged on the right side of the lower shell, a fixed bottom plate for supporting the filter element is arranged at the upper port position of the lower shell, a water outlet is arranged in the middle position of the fixed bottom plate, a fixed top plate for sealing the top of the filter element is arranged at the inner top of the upper shell, a slag discharge pipe is arranged at the outer side of the lower end of the upper shell, a slag discharge valve is arranged on the slag discharge pipe, and a throttle valve for controlling the on-off of liquid is arranged on the oil inlet pipe and the oil outlet;
The upper end of the filter shell is also provided with a back blowing hole cleaning piece for cleaning the filter element.
In one alternative, the blowback cleaning orifice includes a drive box disposed at the top of the filter housing;
The filter comprises a filter casing, a driving box, a filter core, a filter inner diameter, a sliding hole, a displacement pushing piece, a jet disc and a gas guide pipe, wherein the filter casing is provided with the sliding hole at the upper end, the sliding hole is matched with the sliding hole, the sliding hole is provided with the sliding column, the displacement pushing piece is connected to the sliding column and used for driving the sliding column to move up and down, the jet disc matched with the filter core inner diameter is arranged at the lower end of the sliding column, a plurality of high-pressure jet holes are distributed on the jet disc, the gas guide inner hole communicated with the high-pressure jet holes is arranged in the sliding column, and the upper end of the gas guide inner hole is communicated with the driving box through the gas guide pipe.
In an alternative scheme, the jet disc is rotationally connected with the lower end of the sliding column, and an included angle between the jet direction of the high-pressure jet hole and the tangential direction of the jet disc is an acute angle.
In an alternative scheme, the lower extreme of drive case is equipped with a mounting disc, the mounting disc passes through the bolt and is connected with the upper end of filtration shell, be equipped with sealed pad between mounting disc and the filtration shell.
In an alternative scheme, the displacement pushing piece is including setting up the transmission piece in the left side of slip post, the inner wall sliding connection of transmission piece and drive case is equipped with the transmission screw on the transmission piece, and the cooperation is equipped with a drive screw in this transmission screw, the lower extreme of drive screw rotates with the top of filtering the shell and is connected, drive screw's upper end is connected with driving motor.
In an alternative scheme, a fixing groove matched with the filter element is formed in the abutting surface of the fixing top plate and the abutting surface of the fixing bottom plate, and a sealing ring is arranged in the fixing groove.
In an alternative, the filter element comprises a first filter cartridge filter element and a second filter cartridge filter element, wherein a plurality of vent holes are distributed on the surfaces of the second filter cartridge filter element and the first filter cartridge filter element, and a filling piece is arranged between the first filter cartridge filter element and the second filter cartridge filter element.
In one alternative, the filler comprises cellulosic fiber material and polar fiber material.
Compared with the prior art, the fine filter for the ship lubricating oil purification system can sufficiently purify engine oil in the engine oil tank, is convenient for quick replacement of the filter element, and is provided with the back blowing hole cleaning function, so that impurities can be blown out quickly, the filter element is maintained in a state of high-efficiency filtering performance, and the practicability is strong.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic view of a filter cartridge according to one embodiment of the invention;
FIG. 4 is a schematic view showing an internal structure of a jet disk according to an embodiment of the present invention;
In the figure: 1. the device comprises a base, 2, a water outlet, 3, a fixed bottom plate, 4, a slag discharging pipe, 5, an oil inlet pipe, 6, a filter shell, 7, an air guide inner hole, 8, a transmission block, 9, a transmission screw, 10, a driving motor, 11, a driving box, 12, a sliding column, 13, an air guide pipe, 14, a fixed top plate, 15, a high-pressure air jet hole, 16, an air jet disc, 17, a filter element, 171, a first filter cartridge element, 172, a second filter cartridge element, 18, a first flange, 19, a second flange, 20, an oil outlet, 21 and an air blowing end of the air guide pipe.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
In one embodiment, as shown in fig. 1 to 4, a fine filter for a ship lubricating oil purification system includes a base 1 and a filter housing 6 provided at an upper end of the base 1;
The filter shell 6 consists of an upper shell and a lower shell, a first flange 18 at the lower end of the upper shell and a second flange 19 at the upper end of the lower shell are fixedly connected through bolts, a sealing gasket for sealing is arranged between the first flange 18 and the second flange 19, so that the later replacement and maintenance of components are facilitated, a filter core 17 for filtering and purifying oil is arranged in the filter shell 6, an oil inlet pipe 5 for feeding liquid is arranged at the left upper side of the upper shell, an oil outlet 20 for draining liquid is arranged at the right side of the lower shell, a fixing bottom plate 3 for supporting the filter core 17 is arranged at the upper port position of the lower shell, a water outlet 2 for draining the purified liquid is arranged at the middle position of the fixing bottom plate 3, a fixed top plate 14 for sealing the top of the filter core 17 is arranged at the inner top of the upper shell, a slag discharging pipe 4 for discharging impurities is arranged at the outer side of the lower end of the upper shell, a slag discharging valve is arranged on the slag discharging pipe 4, a throttle valve for controlling the on-off of liquid is arranged on the oil inlet pipe 5 and the oil outlet 20, and when the filter shell 6 is used, the filter shell 6 is communicated with the oil circulating pump 6 through the circulation pump after the circulation pump and the oil is circulated between the filter shell and the filter shell, so that the oil is circulated and the oil is circulated when the engine is used;
The upper end of the filter housing 6 is also provided with a back blowing hole cleaning piece for cleaning the filter core 17, and the back blowing hole cleaning piece moves up and down to blow air up and down to the inner wall of the filter core 17, so that the filter core 17 is in a good filtering state.
In an alternative scheme of the embodiment, as shown in fig. 1 and fig. 2, the back blowing cleaning hole member includes a driving box 11 disposed at the top of the filtering shell 6, a sliding port is disposed at the upper end of the filtering shell 6 where the driving box 11 is located, a sliding column 12 is disposed in the sliding port in a matching manner, a displacement pushing member for driving the sliding column 12 to move up and down is connected to the sliding column 12, a jet disc 16 matched with the inner diameter of the filter element 17 is disposed at the lower end of the sliding column 12, a plurality of high pressure jet holes 15 are distributed at the outer side of the jet disc 16, an air guide inner hole 7 communicating with the high pressure jet holes 15 is disposed inside the sliding column 12, the upper end of the air guide inner hole 7 is communicated with an air guide air blowing end 21 on the driving box 11 through an air guide pipe 13, and when in use, high pressure air is input into the air guide inner hole 7 through the air guide pipe 13, the high pressure air is ejected along the high pressure jet holes 15, and the ejected high pressure jet column blows impurities attached to the surface of the filter element 17, so as to realize cleaning operation;
It should be noted that when the hole cleaning operation is performed, the oil inlet pipe 5 and the oil outlet 20 are plugged, then the slag discharging valve on the slag discharging pipe 4 is opened, and under the action of high-pressure air flow, the air flow drives impurities to be discharged along the slag discharging pipe 4, so that the filter element 17 is not required to be replaced, and the simple hole cleaning operation is realized.
In an alternative scheme of the embodiment, as shown in fig. 1, a mounting plate is arranged at the lower end of the driving box 11, the mounting plate is connected with the upper end of the filtering shell 6 through a bolt, a sealing gasket is arranged between the mounting plate and the filtering shell 6, and the connection is convenient and fast, and the sealing performance is good.
In an alternative embodiment, as shown in fig. 1 to fig. 4, the air injection disk 16 is rotatably connected to the lower end of the sliding column 12, and an included angle between the air injection direction of the high-pressure air injection hole 15 and the tangential direction of the air injection disk 16 is an acute angle, and the reaction force generated by the high-pressure air injection hole 15 forms a moment for driving the air injection disk 16 to rotate, so that the blowback range is increased.
In an alternative scheme of the embodiment, as shown in fig. 1 and fig. 2, the displacement pushing member is used for driving the sliding column 12 to reciprocate up and down, and includes a driving block 8 disposed at the left side of the sliding column 12, the driving block 8 is slidably disposed on an inner wall of the driving box 11, a threaded hole is disposed on the driving block 8, a driving screw hole is disposed in the threaded hole in a matching manner, a driving screw 9 is disposed in the driving screw hole in a matching manner, a lower end of the driving screw 9 is rotationally connected with the top of the filtering housing 6, and a driving motor 10 for driving the driving screw 9 to rotate is connected with an upper end of the driving screw 9, so that under the action of the driving motor 10, the driving block 8 and the driving screw 9 relatively rotate, and thus the driving block 8 is driven to slide along the inner wall of the driving box 11, and thus the sliding column 12 can be driven to slide up and down.
In an alternative scheme of the embodiment, the pressing surfaces of the fixed top plate 14 and the fixed bottom plate 3 are provided with fixing grooves matched with the filter element 17, a sealing ring for improving the sealing effect is matched with the fixing grooves, when the filter element is actually installed, only the upper shell and the lower shell are required to be detached, then the filter element 17 is placed in the corresponding fixing grooves, the filter element 17 is conveniently and rapidly fixed, and the sealing ring can be further improved.
In an alternative embodiment, as shown in fig. 3, the filter core 17 includes a first filter cartridge filter core 171 and a second filter cartridge filter core 172, a plurality of ventilation holes are distributed on the surfaces of the second filter cartridge filter core 172 and the first filter cartridge filter core 171, a filling member for improving the filtering effect is arranged between the first filter cartridge filter core 171 and the second filter cartridge filter core 172, the filling member includes a cellulose fiber material and a polar fiber material, the cellulose fiber can absorb moisture in oil, and the polar fiber can absorb paint, sludge and acidic substances in oil.
The above embodiment discloses a fine filter for ship lubricating oil clean-up system, in actual use, communicate filter shell 6 with the oil tank, impel liquid circulation flow between filter shell 6 and oil tank through the circulating pump, engine oil enters into filter shell 6 along fluid intake pipe 5, the impurity can be blocked by filter core 17, the engine oil after purifying passes filter core 17, and get into lower casing along delivery port 2, then follow fluid export 20, the filler in filter core 17 can detach acid substance in the engine oil, impurity and moisture, when need carry out simple and easy clear hole processing to filter core 17, input high-pressure gas in the gas guide hole 7 through air duct 13, high-pressure gas is spouted along high-pressure gas jet 15, the high-pressure gas post of blowout can blow off the impurity that adheres to filter core 17 surface, thereby realize clear hole operation, drive air guide hole 7 through displacement impeller and slide from top to bottom, thereby carry out abundant blowback processing to filter core 17's inner wall, in the blowback processing, close oil intake pipe 5 and fluid export 20, so high-speed air current can be with the sediment pipe 4 along the sediment pipe 4 discharge, need take place on the filter core 17 when need to take place on the filter core 17 and only need to dismantle the filter core when need to take down.
The fine filter for the ship lubricating oil purification system can sufficiently purify engine oil in the engine oil tank, is convenient for quick replacement of the filter element, and is provided with a back flushing hole function, so that impurities can be blown out quickly, and the filter element is maintained in a state of high-efficiency filtering performance, and has strong practicability.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (5)
1. A fine filter for a ship lubricating oil purification system, which is characterized by comprising a base (1) and a filter shell (6) arranged at the upper end of the base (1);
The filter shell (6) is composed of an upper shell and a lower shell, a first flange (18) at the lower end of the upper shell is fixedly connected with a second flange (19) at the upper end of the lower shell through bolts, a sealing gasket is arranged between the first flange (18) and the second flange (19), a filter element (17) is arranged in the filter shell (6), an oil inlet pipe (5) is arranged on the left upper side of the upper shell, an oil outlet (20) is arranged on the right side of the lower shell, a fixed bottom plate (3) for supporting the filter element (17) is arranged at the upper port of the lower shell, a water outlet (2) is arranged in the middle of the fixed bottom plate (3), a fixed top plate (14) for sealing the top of the filter element (17) is arranged at the inner top of the upper shell, a slag discharging pipe (4) is arranged at the outer side of the lower end of the upper shell, and slag discharging valves are arranged on the slag discharging pipe (4), and the oil inlet pipe (5) and the oil outlet (20) are both provided with throttle valves for controlling on and off of liquid;
The upper end of the filter shell (6) is also provided with a back blowing hole cleaning piece for cleaning the filter element (17);
The back blowing hole cleaning piece comprises a driving box (11) arranged at the top of the filtering shell (6); the filter comprises a filter housing (6) with a driving box (11), wherein the upper end of the filter housing is provided with a sliding port, a sliding column (12) is matched with the sliding port, a displacement pushing piece for driving the sliding column (12) to move up and down is connected to the sliding column (12), an air injection disc (16) matched with the inner diameter of a filter element (17) is arranged at the lower end of the sliding column (12), a plurality of high-pressure air injection holes (15) are distributed on the air injection disc (16), an air guide inner hole (7) communicated with the high-pressure air injection holes (15) is formed in the sliding column (12), and the upper end of the air guide inner hole (7) is communicated with the driving box (11) through an air guide pipe (13);
The filter cartridge is characterized in that a fixing groove matched with the filter cartridge (17) is formed in the pressing surface of the fixing top plate (14) and the pressing surface of the fixing bottom plate (3), a sealing ring is arranged in the fixing groove, the filter cartridge (17) comprises a first filter cartridge (171) and a second filter cartridge (172), a plurality of vent holes are distributed on the surfaces of the second filter cartridge (172) and the first filter cartridge (171), and a filling piece is arranged between the first filter cartridge (171) and the second filter cartridge (172).
2. The fine filter for a marine lubrication oil purification system according to claim 1, wherein the jet disc (16) is rotatably connected to the lower end of the sliding column (12), and the jet direction of the high-pressure jet hole (15) forms an acute angle with the tangential direction of the jet disc (16).
3. The fine filter for a marine lubrication oil purification system according to claim 1, wherein the lower end of the drive box (11) is provided with a mounting disc, the mounting disc is connected with the upper end of the filter housing (6) by means of bolts, and a gasket is provided between the mounting disc and the filter housing.
4. The fine filter for a ship lubricating oil purification system according to claim 1, wherein the displacement pushing member comprises a transmission block (8) arranged on the left side of the sliding column (12), the transmission block (8) is in sliding connection with the inner wall of the driving box (11), a transmission screw hole is formed in the transmission block (8), a transmission screw rod (9) is matched in the transmission screw hole, the lower end of the transmission screw rod (9) is rotatably connected with the top of the filtering shell (6), and the upper end of the transmission screw rod (9) is connected with a driving motor (10).
5. A fine filter for a marine oil purification system according to claim 1, wherein the filler comprises a cellulosic fiber material and a polar fiber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211138453.1A CN115434783B (en) | 2022-09-19 | 2022-09-19 | Fine filter for ship lubricating oil purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211138453.1A CN115434783B (en) | 2022-09-19 | 2022-09-19 | Fine filter for ship lubricating oil purification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115434783A CN115434783A (en) | 2022-12-06 |
| CN115434783B true CN115434783B (en) | 2024-04-30 |
Family
ID=84248862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211138453.1A Active CN115434783B (en) | 2022-09-19 | 2022-09-19 | Fine filter for ship lubricating oil purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115434783B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209687844U (en) * | 2019-01-28 | 2019-11-26 | 贵阳力科液压技术有限公司 | A kind of signal detecting system oil road filter device |
| CN111058922A (en) * | 2020-01-13 | 2020-04-24 | 嵊州初雪汽车配件有限公司 | Engine oil filter capable of automatically cleaning filter screen |
| CN210660251U (en) * | 2019-07-23 | 2020-06-02 | 陆群 | Filter structure with replaceable filter element |
| CN212479364U (en) * | 2020-04-07 | 2021-02-05 | 福建胜优环保科技有限公司 | Engine oil filter element applied to ship |
| CN217409944U (en) * | 2022-06-01 | 2022-09-13 | 湖北公乐粮油机械有限公司 | Vacuum combined oil filter |
-
2022
- 2022-09-19 CN CN202211138453.1A patent/CN115434783B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209687844U (en) * | 2019-01-28 | 2019-11-26 | 贵阳力科液压技术有限公司 | A kind of signal detecting system oil road filter device |
| CN210660251U (en) * | 2019-07-23 | 2020-06-02 | 陆群 | Filter structure with replaceable filter element |
| CN111058922A (en) * | 2020-01-13 | 2020-04-24 | 嵊州初雪汽车配件有限公司 | Engine oil filter capable of automatically cleaning filter screen |
| CN212479364U (en) * | 2020-04-07 | 2021-02-05 | 福建胜优环保科技有限公司 | Engine oil filter element applied to ship |
| CN217409944U (en) * | 2022-06-01 | 2022-09-13 | 湖北公乐粮油机械有限公司 | Vacuum combined oil filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115434783A (en) | 2022-12-06 |
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