CN112164554A - Movable transformer oil filter - Google Patents
Movable transformer oil filter Download PDFInfo
- Publication number
- CN112164554A CN112164554A CN202010976032.0A CN202010976032A CN112164554A CN 112164554 A CN112164554 A CN 112164554A CN 202010976032 A CN202010976032 A CN 202010976032A CN 112164554 A CN112164554 A CN 112164554A
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- Prior art keywords
- fixedly connected
- transformer oil
- oil filter
- fixed
- spherical shell
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- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 12
- 230000005389 magnetism Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 33
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000010735 electrical insulating oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of transformer oil filters, in particular to a movable transformer oil filter, which comprises a transformer oil filter main body and a controller, wherein the bottom end of the transformer oil filter main body is fixedly connected with a roller, one end of the roller is fixedly connected with a limiting device, the limiting device comprises a fixed shell, a second spring, a connecting plate, a fixed disk, a quadrangular prism, a first electromagnet, a second electromagnet, a toothed ring, a threaded block, a threaded rod, a limiting groove, a gear, a protective cover and a storage battery, one end of the roller is fixedly connected with the fixed shell, in the invention, the integral movement of the transformer oil filter is facilitated through the roller by the arranged second spring, the second electromagnet, the toothed ring, the threaded block and the threaded rod, and meanwhile, after the roller stops rotating, the gear is automatically clamped by the toothed ring, so that the limiting and fixing of the roller are realized through the gear, the rollers can not rotate by themselves, and the four rollers are not limited by the manual operation of workers.
Description
Technical Field
The invention relates to the technical field of transformer oil filters, in particular to a movable transformer oil filter.
Background
The transformer oil filter is a mechanical device for filtering solid impurities and moisture in oil, improving the performance of oil and improving the insulating strength of the transformer oil, is a special device for purifying and treating unqualified electrical insulating oil in industrial and mining enterprises such as power plants, power stations, power companies, metallurgy, petrifaction and railways, can perform vacuum injection and pumping on insulating power equipment and perform vacuum drying on moisture of the electrical equipment, and along with the development of the society, the requirement on the transformer oil filter is increased day by day, so that the requirement on a movable transformer oil filter is increased day by day.
Most of transformer oil filters existing in the market at present are simple in structure and single in function, after stopping movement, a worker is required to manually brake four rollers for limiting, the working efficiency is low, the use of the worker is inconvenient, and meanwhile, the flange connection of the general transformer oil filters cannot adjust the connection direction of the flanges and cannot meet the requirements of the worker, so that the movable transformer oil filter is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a movable transformer oil filter to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a movable transformer oil filter comprises a transformer oil filter main body and a controller, wherein a roller is fixedly connected to the bottom end of the transformer oil filter main body, a limiting device is fixedly connected to one end of the roller, an adjusting device is fixedly connected to the left end of the transformer oil filter main body, a controller is fixedly connected to the right end of the adjusting device, a first connecting pipe is communicated with the right end of the transformer oil filter main body, a steering device is communicated with the right end of the first connecting pipe, a second connecting pipe is communicated with the right end of the steering device, a flange is fixedly connected to the right end of the second connecting pipe, the limiting device comprises a fixed shell, a second spring, a connecting plate, a fixed disk, a quadrangular prism, a first electromagnet, a second electromagnet, a toothed ring, a threaded block, a threaded rod, a limiting groove, a gear, a protective cover and a storage battery, a fixed shell is fixedly connected to, the utility model discloses a transformer oil filter, including the top of set casing, the inboard fixedly connected with second spring in top of set casing, the terminal fixedly connected with connecting plate of main shaft of second spring, the bottom fixedly connected with quadrangular prism of connecting plate, the outside sliding connection of quadrangular has the fixed disk, and fixed disk and set casing fixed connection, the bottom fixedly connected with second electro-magnet of fixed disk, the inboard fixedly connected with first electro-magnet in bottom of set casing, the bottom fixedly connected with thread block of set casing, the inboard spiral connection of thread block has the threaded rod, the spacing groove has been seted up to the inboard of quadrangular, the bottom fixedly connected with safety cover of transformer oil filter main part, the inboard fixedly connected with battery of safety cover, the pivot fixedly connected with gear of gyro wheel.
Preferably, the first electromagnet and the second electromagnet have the same magnetism after being electrified.
Preferably, the horizontal central line of the threaded rod corresponds to the horizontal central line of the limiting groove, and the diameter of the limiting groove is larger than that of the threaded rod.
Preferably, adjusting device includes spacing post, draw-in groove, slider, first spring, movable plate, spliced pole, dog and dop, the inboard fixedly connected with spacing post of left end of transformer oil filter main part, the outside sliding connection of spacing post has the slider, the right-hand member fixedly connected with controller of slider, the inboard fixedly connected with first spring of right-hand member of slider, the other end fixedly connected with movable plate of first spring, and movable plate and slider sliding connection, the left end fixedly connected with spliced pole of movable plate, the left end fixedly connected with dop of spliced pole, the inboard fixedly connected with dog of slider.
Preferably, the inner side of the right end of the limiting column is provided with a clamping groove, and the clamping head is clamped with the limiting column through the clamping groove.
Preferably, turn to the device and include fixed spherical shell, sealing ring, intercommunication spherical shell, through-hole, spacing pad, mount and adjusting screw, the right-hand member outside intercommunication of first connecting pipe has fixed spherical shell, and fixed spherical shell and second connecting pipe intercommunication, the inboard fixedly connected with sealing ring of fixed spherical shell, the inboard rotation of sealing ring is connected with the intercommunication spherical shell, the bottom right side fixedly connected with mount of fixed spherical shell, the inboard screwed connection of mount has adjusting screw, adjusting screw's the other end rotates and is connected with spacing pad, and spacing pad and the laminating of intercommunication spherical shell.
Preferably, the inner side of the communicating spherical shell is provided with two through holes, and the horizontal center line of the through hole on the left side is perpendicular to the vertical center line of the through hole on the upper side.
Preferably, the sealing ring is made of a rubber ring.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the transformer oil filter, the second spring, the idler wheels, the fixed disc, the quadrangular prism, the first electromagnet, the second electromagnet, the gear ring, the threaded block and the threaded rod are arranged, the integral movement of the transformer oil filter is facilitated through the idler wheels, and meanwhile, after the idler wheels stop rotating, the gear ring automatically clamps the gear, so that the idler wheels are limited and fixed through the gear, the idler wheels do not rotate automatically, the four idler wheels do not need to be limited manually by workers, the working efficiency is improved, and the use of the workers is facilitated.
2. According to the invention, through the arrangement of the fixed spherical shell, the sealing ring, the communicating spherical shell, the through hole, the limiting pad, the fixing frame and the adjusting screw, the connecting direction of the flange can be adjusted to the horizontal connecting direction or the vertical connecting direction according to the requirements of workers, so that the flange is convenient for the workers to use, and the applicability of the flange is improved.
3. According to the invention, through the arrangement of the limiting column, the clamping groove, the sliding block, the first spring, the moving plate, the connecting column, the stop block and the clamping head, a worker can adjust the operation height of the controller according to the height of the worker, so that the use requirements of people with different heights are met, and the operation of the worker is facilitated.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 at point A according to the present invention;
FIG. 3 is an enlarged view of the inner side of the fixing spherical shell according to the present invention;
FIG. 4 is a schematic view of the structure of FIG. 3 at C according to the present invention;
FIG. 5 is an enlarged view of the mounting structure of the inside of the stationary housing of the present invention;
FIG. 6 is a schematic view of the structure at B of FIG. 5 according to the present invention.
In the figure: 1-transformer oil filter main body, 2-controller, 3-adjusting device, 301-limit column, 302-clamping groove, 303-sliding block, 304-first spring, 305-moving plate, 306-connecting column, 307-stop block, 308-clamping head, 4-steering device, 401-fixed spherical shell, 402-sealing ring, 403-communicating spherical shell, 404-through hole, 405-limit pad, 406-fixed frame, 407-adjusting screw, 5-roller, 6-limiting device, 601-fixed shell, 602-second spring, 603-connecting plate, 604-fixed disk, 605-quadrangular prism, 606-first electromagnet, 607-second electromagnet, 608-toothed ring, 609-threaded block, 610-threaded rod, 611, a limiting groove, 612, a gear, 613, a protective cover, 614, a storage battery, 7, a first connecting pipe, 8, a second connecting pipe and 9, wherein the storage battery is arranged in the storage battery.
Detailed Description
Example 1:
referring to fig. 1-6, the present invention provides a technical solution:
a movable transformer oil filter comprises a transformer oil filter main body 1 and a controller 2, wherein the bottom end of the transformer oil filter main body 1 is fixedly connected with a roller 5, one end of the roller 5 is fixedly connected with a limiting device 6, the left end of the transformer oil filter main body 1 is fixedly connected with an adjusting device 3, the right end of the adjusting device 3 is fixedly connected with the controller 2, the right end of the transformer oil filter main body 1 is communicated with a first connecting pipe 7, the right end of the first connecting pipe 7 is communicated with a steering device 4, the right end of the steering device 4 is communicated with a second connecting pipe 8, the right end of the second connecting pipe 8 is fixedly connected with a flange 9, the limiting device 6 comprises a fixed shell 601, a second spring 602, a connecting plate 603, a fixed disk 604, a quadrangular prism 605, a first electromagnet 606, a second electromagnet 607, a toothed ring 608, a threaded block 609, a threaded rod 610, a limiting groove 611, a gear, a fixed shell 601 is fixedly connected with one end of the roller 5, a second spring 602 is fixedly connected with the inner side of the top end of the fixed shell 601, a connecting plate 603 is fixedly connected with the tail end of a main shaft of the second spring 602, a quadrangular prism 605 is fixedly connected with the bottom end of the connecting plate 603, a fixed disc 604 is slidably connected with the outer side of the quadrangular prism 605, the fixed disc 604 is fixedly connected with the fixed shell 601, a second electromagnet 607 is fixedly connected with the bottom end of the fixed disc 604, a first electromagnet 606 is fixedly connected with the inner side of the bottom end of the fixed shell 601, a thread block 609 is fixedly connected with the bottom end of the fixed shell 601, a threaded rod 610 is spirally connected with the inner side of the thread block 609, a limiting groove 611 is formed in the inner side of the quadrangular prism 605, a protective cover 613 is fixedly connected with the bottom end of the transformer oil filter, the rotating shaft of the roller 5 is fixedly connected with a gear 612.
The first electromagnet 606 and the second electromagnet 607 are same in magnetism generated after being electrified, the first electromagnet 606 and the second electromagnet 607 can be separated from each other after being electrified, the horizontal central line of the threaded rod 610 corresponds to the horizontal central line of the limiting groove 611, the diameter of the limiting groove 611 is larger than that of the threaded rod 610, the threaded rod 610 can be conveniently inserted into the inner side of the limiting groove 611 to limit the quadrangular prism 605, the adjusting device 3 comprises a limiting column 301, a clamping groove 302, a sliding block 303, a first spring 304, a moving plate 305, a connecting column 306, a stop block 307 and a clamping head 308, the inner side of the left end of the transformer main body 1 is fixedly connected with the limiting column 301, the outer side of the limiting column 301 is slidably connected with the sliding block 303, the right end of the sliding block 303 is fixedly connected with a controller 2, the inner side of the right end of the sliding block 303 is fixedly connected with the first, the movable plate 305 is connected with the sliding block 303 in a sliding manner, the movable plate 305 can be limited by the first spring 304, the left end of the movable plate 305 is fixedly connected with the connecting column 306, the left end of the connecting column 306 is fixedly connected with the clamping head 308, the inner side of the sliding block 303 is fixedly connected with the stop 307, the movable plate 305 can be limited by the stop 307, the inner side of the right end of the limiting column 301 is provided with the clamping groove 302, the clamping head 308 is clamped with the limiting column 301 through the clamping groove 302, the sliding block 303 can be limited by the clamping head 308, the steering device 4 comprises a fixed spherical shell 401, a sealing ring 402, a communicating spherical shell 403, a through hole 404, a limiting pad 405, a fixed frame 406 and an adjusting screw 407, the outer side of the right end of the first connecting pipe 7 is communicated with the fixed spherical shell 401, the fixed spherical shell 401 is communicated with the second connecting pipe 8, the inner side of, fixed spherical shell 401's bottom right side fixedly connected with mount 406, the inboard screwed connection of mount 406 has adjusting screw 407, adjusting screw 407's the other end rotates and is connected with spacing pad 405, and spacing pad 405 and the laminating of intercommunication spherical shell 403, through-hole 404 has been seted up to the inboard of intercommunication spherical shell 403, and the number of through-hole 404 is total two, and the horizontal center line that is located left through-hole 404 and the vertical central line mutually perpendicular who is located the through-hole 404 of upside, intercommunication spherical shell 403 can all communicate with first connecting pipe 7 and second connecting pipe 403 when guaranteeing that flange 9 is in level or vertical state, sealing ring 402 is made by the rubber ring, be convenient for realize fixed spherical shell 401 and communicate the sealed between the spherical shell.
The working process is as follows: in the invention, the first electromagnet 606, the second electromagnet 607 and the controller 2 are powered by the storage battery 614, a worker can adjust the position of the controller 2 according to the height of the worker, the worker pushes the controller 2 in the vertical direction, so that the controller 2 drives the sliding block 303 to move in the vertical direction along the limiting column 301, meanwhile, the sliding block 303 drives the chuck 308 to slide in the vertical direction along the limiting column 301, when the chuck 308 and the card slot 302 move relative to each other, the chuck 308 also drives the first spring 304 to correspondingly contract through the connecting column 306 and the moving plate 305 until the controller 2 is in a proper position, at the moment, the first spring 304 drives the chuck 308 to clamp with the card slot 302 through the moving plate 305 and the connecting column 306, thereby realizing the limiting fixation of the sliding block 303 and the controller 2, and facilitating the worker to use the controller 2, then the worker controls the first electromagnet 606 and the second electromagnet 607 to be electrified through the controller 2, at this time, the first electromagnet 606 and the second electromagnet 607 generate the same magnetism, then the second electromagnet 607 drives the fixing disc 604 to move upwards under the action of the magnetism, at the same time, the fixing disc 604 drives the toothed ring 608 to move upwards through the quadrangular prism 605, so that the toothed ring 608 is separated from the gear 612, namely, the toothed ring 608 does not limit the gear 612, then the worker can push the transformer oil filter main body 1 to a specified position through the roller 5, the first electromagnet 606 and the second electromagnet 607 are powered off after the transformer oil filter main body is pushed to the specified position, at this time, no mutual magnetic force exists between the first electromagnet 606 and the second electromagnet 607, the connecting plate 603 is clamped with the gear 612 through the quadrangular prism 605 under the action of the second spring 602, the gear 612 is limited through the toothed ring 608, therefore, the gear 612 and the roller 5 cannot move, then a worker adjusts the connection direction of the flange 9 according to actual installation requirements, the worker firstly rotates the adjusting screw 407 anticlockwise, the adjusting screw 407 carries the limiting pad 405 and does not contact with the communicating spherical shell 403, then the worker drives the flange 9 and the communicating spherical shell 403 to rotate on the inner side of the fixed spherical shell 401 through the second connecting pipe 8 until the flange 9 is in a vertical or horizontal state, at the moment, the through hole 404 is communicated with the first connecting pipe 7, then the worker rotates the adjusting screw 407 anticlockwise, the limiting pad 405 is in close contact with the communicating spherical shell 403 through the adjusting screw 407, limitation on the communicating spherical shell 403 is achieved through the limiting pad 405, and the communicating spherical shell 403 cannot rotate freely on the inner side of the fixed spherical shell 401.
The same parts in embodiment 2 and embodiment 1 are not described again, except that when the transformer oil filter main body 1 needs to be moved and the electric quantity of the storage battery 614 is insufficient, the worker rotates the threaded rod 610 to enable the threaded rod 610 to be clamped with the limiting groove 611, and the limiting of the quadrangular prism 605 is achieved through the threaded rod 610, namely the toothed ring 608 is not meshed with the gear 612 through the action of the quadrangular prism 605.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. The utility model provides a movable transformer oil filter, includes transformer oil filter main part (1) and controller (2), its characterized in that: bottom fixedly connected with gyro wheel (5) of transformer oil filter main part (1), the one end fixedly connected with stop device (6) of gyro wheel (5), the left end fixedly connected with adjusting device (3) of transformer oil filter main part (1), the right-hand member fixedly connected with controller (2) of adjusting device (3), the right-hand member intercommunication of transformer oil filter main part (1) has first connecting pipe (7), the right-hand member intercommunication of first connecting pipe (7) has to turn to device (4), the right-hand member intercommunication that turns to device (4) has second connecting pipe (8), the right-hand member fixedly connected with flange (9) of second connecting pipe (8), stop device (6) are including set casing (601), second spring (602), connecting plate (603), fixed disk (604), quadrangular (605), first electro-magnet (606), The roller comprises a second electromagnet (607), a toothed ring (608), a threaded block (609), a threaded rod (610), a limiting groove (611), a gear (612), a protective cover (613) and a storage battery (614), wherein one end of the roller (5) is fixedly connected with a fixed shell (601), the inner side of the top end of the fixed shell (601) is fixedly connected with a second spring (602), the tail end of a main shaft of the second spring (602) is fixedly connected with a connecting plate (603), the bottom end of the connecting plate (603) is fixedly connected with a quadrangular prism (605), the outer side of the quadrangular prism (605) is slidably connected with a fixed disc (604), the fixed disc (604) is fixedly connected with the fixed shell (601), the bottom end of the fixed disc (604) is fixedly connected with the second electromagnet (607), the inner side of the bottom end of the fixed shell (601) is fixedly connected with a first electromagnet (606), and the bottom end of the fixed, the utility model discloses a transformer oil filter, including the inboard screwed connection of screw block (609) have threaded rod (610), spacing groove (611) have been seted up to the inboard of quadrangular prism (605), the bottom fixedly connected with safety cover (613) of transformer oil filter main part (1), the inboard fixedly connected with battery (614) of safety cover (613), the pivot fixedly connected with gear (612) of gyro wheel (5).
2. The movable transformer oil filter of claim 1, characterized in that: the magnetism generated after the first electromagnet (606) and the second electromagnet (607) are electrified is the same.
3. The movable transformer oil filter of claim 1, characterized in that: the horizontal center line of the threaded rod (610) corresponds to the horizontal center line of the limiting groove (611), and the diameter of the limiting groove (611) is larger than that of the threaded rod (610).
4. The movable transformer oil filter of claim 1, characterized in that: the adjusting device (3) comprises a limiting column (301), a clamping groove (302), a sliding block (303), a first spring (304), a moving plate (305), a connecting column (306), a stop block (307) and a clamping head (308), the inner side of the left end of the transformer oil filter main body (1) is fixedly connected with a limit column (301), the outer side of the limit column (301) is connected with a sliding block (303) in a sliding way, the right end of the sliding block (303) is fixedly connected with a controller (2), a first spring (304) is fixedly connected to the inner side of the right end of the sliding block (303), the other end of the first spring (304) is fixedly connected with a moving plate (305), the moving plate (305) is connected with the slide block (303) in a sliding way, the left end of the moving plate (305) is fixedly connected with a connecting column (306), the left end of the connecting column (306) is fixedly connected with a clamping head (308), and the inner side of the sliding block (303) is fixedly connected with a stop block (307).
5. The movable transformer oil filter of claim 4, characterized in that: a clamping groove (302) is formed in the inner side of the right end of the limiting column (301), and the clamping head (308) is clamped with the limiting column (301) through the clamping groove (302).
6. The movable transformer oil filter of claim 1, characterized in that: turn to device (4) including fixed spherical shell (401), sealing ring (402), intercommunication spherical shell (403), through-hole (404), spacing pad (405), mount (406) and adjusting screw (407), the right-hand member outside intercommunication of first connecting pipe (7) has fixed spherical shell (401), and fixed spherical shell (401) and second connecting pipe (8) intercommunication, the inboard fixedly connected with sealing ring (402) of fixed spherical shell (401), the inboard rotation of sealing ring (402) is connected with intercommunication spherical shell (403), the bottom right side fixedly connected with mount (406) of fixed spherical shell (401), the inboard screw connection of mount (406) has adjusting screw (407), the other end of adjusting screw (407) rotates and is connected with spacing pad (405), and spacing pad (405) and the laminating of intercommunication spherical shell (403).
7. The movable transformer oil filter of claim 6, characterized in that: through holes (404) are formed in the inner side of the communicating spherical shell (403), the number of the through holes (404) is two, and the horizontal center line of the through hole (404) on the left side is perpendicular to the vertical center line of the through hole (404) on the upper side.
8. The movable transformer oil filter of claim 6, characterized in that: the sealing ring (402) is made of a rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976032.0A CN112164554B (en) | 2020-09-16 | 2020-09-16 | Movable transformer oil filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976032.0A CN112164554B (en) | 2020-09-16 | 2020-09-16 | Movable transformer oil filter |
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| Publication Number | Publication Date |
|---|---|
| CN112164554A true CN112164554A (en) | 2021-01-01 |
| CN112164554B CN112164554B (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010976032.0A Active CN112164554B (en) | 2020-09-16 | 2020-09-16 | Movable transformer oil filter |
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| CN (1) | CN112164554B (en) |
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| CN112594198A (en) * | 2021-01-12 | 2021-04-02 | 沈阳工程学院 | Small-sized high-pressure-ratio centrifugal compressor |
| CN114088671A (en) * | 2021-11-11 | 2022-02-25 | 河北地质大学 | Fluorescent sensor for monitoring water area environment |
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| Publication number | Publication date |
|---|---|
| CN112164554B (en) | 2021-11-23 |
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Denomination of invention: A movable transformer oil filter Effective date of registration: 20231106 Granted publication date: 20211123 Pledgee: China Co. truction Bank Corp Yiyang branch Pledgor: Huaxiang XiangNeng Technology Co.,Ltd. Registration number: Y2023980063452 |