CN115810467B - All-insulation outgoing line power transformer - Google Patents
All-insulation outgoing line power transformer Download PDFInfo
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- CN115810467B CN115810467B CN202310077308.5A CN202310077308A CN115810467B CN 115810467 B CN115810467 B CN 115810467B CN 202310077308 A CN202310077308 A CN 202310077308A CN 115810467 B CN115810467 B CN 115810467B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention relates to the technical field of power transformers, in particular to a full-insulation outgoing line power transformer, which comprises a box body, wherein a high-voltage sleeve, a neutral point sleeve and a low-voltage oil-gas separation device are arranged on the box body, a cooling box is arranged at the end of the box body, an oil pump is arranged between the cooling box and the box body, a filtering part is arranged between the oil pump and the cooling box, the filtering part comprises a shell, oil outlet pipes are arranged at two sides of the shell, a connecting hole is arranged between the oil outlet pipes and the shell, an oil inlet hole is arranged at one end of the shell, a rotary column is rotatably arranged in the shell, filter screens are fixed at two sides of the rotary column, and a blocking block is arranged at the outer end of each filter screen. According to the invention, after the filter screen on one side is blocked, the flow direction of the transformer oil can be automatically switched, the filter screen on the other side filters the transformer oil, and simultaneously the blocked filter screen is backwashed, so that impurities on the filter screen are cleaned, the transformer oil can be filtered for a long time, and the maintenance time is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of power transformers, in particular to a fully-insulated outgoing line power transformer.
Background
A power transformer is a stationary electric device that is used to change an ac voltage (current) of a certain value into another voltage (current) of the same frequency or different values.
In an oil immersed transformer, the oil immersed transformer is cooled mainly by using transformer oil in an oil tank as a cooling medium. In the continuous use process of the transformer oil, the transformer oil can absorb moisture in the air, and can be oxidized due to factors such as high-temperature environment and long-term electric field effect in the long-term use process, so that other impurities are gradually formed, the types of impurities contained in the transformer oil are more, and the content of the transformer oil is reduced. These problems not only lead to a reduction in the cooling performance of the transformer oil, but also to a reduction in the overall insulation, and thus in the overall transformer performance. In the prior art, a filter screen is added in an oil way of a transformer to filter impurities in transformer oil, however, the current filter screen can cause the blockage of a filter hole after long-time use, and the whole oil way needs to be disassembled and maintained, so that the maintenance cost is high, and therefore, the fully-insulated outgoing line power transformer is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defects that a filter screen in the existing oil immersed transformer in the prior art can cause the blockage of a filter hole after being used for a long time, the whole oil way needs to be disassembled and maintained, and the maintenance cost is high.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a full insulation is qualified for next round of competitions power transformer, includes the box, be provided with high-voltage sleeve pipe, neutral point sleeve pipe and low pressure oil gas isolating device on the box, and the oil storage tank is installed to the upper end of box to the cooling tank is installed to the end of box, is provided with radiator fan on the cooling tank, and is provided with the oil pump between cooling tank and the box, be provided with filter unit between oil pump and the cooling tank, filter unit includes the casing, and the both sides of casing all are provided with the delivery line, are provided with the connecting hole between delivery line and the casing, and the one end of casing is provided with the inlet port, and the internal rotation of casing installs the column spinner, the both sides of column spinner is fixed with the filter screen, and the outer end of filter screen is provided with the shutoff piece;
the inside of inlet port is fixed with spacing seat, rotates on the spacing seat and installs the guide plate, set up the rotary groove on the spacing seat, set up the fixture block with rotary groove looks adaptation on the guide plate, the inside one side slidable mounting that is close to the inlet port of casing has the piece of stirring, and the both sides of stirring the piece all are provided with the spring, and stir the both ends of piece all and be provided with the connecting band, one end connecting band with the column spinner is connected, and the other end connecting band with guide plate fixed connection, after the filter screen filtration hole of one side blocks up, the inside oil pressure in one side that its place increases, promotes to stir the piece and slides to the opposite side, drives the guide plate simultaneously and rotates, leads the inside opposite side of transformer oil to filter unit to promote the filter screen rotation to continue to filter transformer oil by the opposite side filter screen, simultaneously, by the transformer oil that flows back flush to the filter screen that blocks, clear up the impurity on the filter screen, so the circulation, can filter transformer oil for a long time, greatly increased maintenance duration.
As a preferable technical scheme of the invention, limit grooves are formed in the inner walls of the two sides of the shell, the limit grooves are positioned on the inner sides of the connecting holes, and the plugging blocks are arranged in the limit grooves to limit the rotation angle of the filter screen.
As a preferable technical scheme of the invention, the size of the plugging block is larger than the inner diameter of the connecting hole, and when one side plugging block covers the connecting hole, the other side plugging block is staggered with the connecting hole, so that the connecting hole is plugged by the plugging block, transformer oil can flow out of the connecting hole at the other side, a filter screen at the other side can be backwashed, and impurities are reduced from adhering to the filter screen.
As a preferable technical scheme of the invention, the guide post is arranged in the shell, penetrates through the poking block, the spring is sleeved on the guide post, the moving stability of the poking block is improved through the guide post, and meanwhile, the guide post is used for fixing the spring.
As a preferable technical scheme of the invention, the middle part of the guide plate is rotationally connected with the limiting seat, and one section of the guide plate positioned in the oil inlet hole is longer than the other section, so that the stability of the guide plate after rotation is improved.
As a preferable technical scheme of the invention, two connecting pipes are arranged at the bottom end of the shell, the top ends of the connecting pipes extend to the inside of the shell, two cover plates for shielding the connecting pipes are fixed at the inner ends of the guide plates through brackets, and the ports of the connecting pipes are plugged through the cover plates, so that the shifting block is pushed to move when the internal hydraulic pressure is increased.
As a preferable technical scheme of the invention, the bottom ends of the two connecting pipes are connected with the same slag discharging pipe, a valve is arranged on the slag discharging pipe, the bottom end of the slag discharging pipe is in threaded connection with a collecting cylinder, a visual window is arranged on the collecting cylinder, impurities blown off on the filter screen enter the slag discharging pipe through the connecting pipes and fall into the collecting cylinder to be collected, after the filter screen is used for a period of time, the amount of impurities in the collecting cylinder can be observed through the visual window, and when a certain amount is reached, the collecting cylinder is taken down by closing the valve, so that the internal impurities can be treated.
As a preferable technical scheme of the invention, a guide pipe is obliquely arranged on a box cover at the top end of the box body and is connected with the output end of the cooling box, guide strips are uniformly distributed on the inner wall of the box body, and the cooled transformer oil is guided to the other end of the box body by the guide pipe so as to form circulation of the transformer oil in the box body;
the guide bars are triangular, are vertically fixed on the inner wall of the tank body, guide transformer oil to the transformer through the guide bars, and improve the cooling effect on the transformer.
As a preferable technical scheme of the invention, the bottom ends of the high-voltage sleeve and the neutral point sleeve are respectively provided with a lifting seat, the box body is provided with a first hand hole corresponding to the high-voltage sleeve and the neutral point sleeve, sulfur hexafluoride gas is arranged in the lifting seat, and the lifting seat seals internal components and parts to reduce the influence of natural conditions and small animals.
As a preferable technical scheme of the invention, the low-pressure oil-gas isolation device comprises a lifting seat fixed on the box body and a low-pressure sleeve arranged in the lifting seat, wherein sealing resin is arranged in the lifting seat, second hand holes are formed in the outer wall of the lifting seat, the low-pressure sleeve is subjected to full-insulation sealing through the resin, and meanwhile, the number of the second hand holes is three and is uniformly distributed on the outer wall of the lifting seat.
The beneficial effects of the invention are as follows:
according to the invention, the filtering part is additionally arranged between the oil ways of the transformer, impurities in the transformer oil are filtered by the filtering part, during filtering, the transformer oil is guided to one side of the inside of the filtering part by the guide plate, the transformer oil is filtered by the filter screen on one side, the filtered transformer oil flows out of the oil outlet pipe on the other side, after the filter hole of the filter screen on one side is blocked, the oil pressure in the side where the filter screen on the other side is positioned is increased, the stirring block is pushed to slide to the other side, the guide plate is driven to rotate, the transformer oil is guided to the other side of the inside of the filtering part, the filter screen is pushed to rotate, so that the transformer oil is continuously filtered by the filter screen on the other side, and meanwhile, during filtering, the blocked filter screen is backwashed by the flowing transformer oil, so that the impurities on the filter screen are circulated, the transformer oil is filtered for a long time, and the maintenance time is greatly prolonged.
According to the invention, the cooled transformer oil can be guided to the transformer in the tank body through the guide pipe and the guide strip which are obliquely arranged, so that the cooling effect on the transformer is improved.
The required external insulation medium of the all-insulated outgoing line power transformer adopts sulfur hexafluoride gas, has small requirements on the external insulation distance of the transformer, and can reduce the external dimension of the transformer.
In summary, after the filter screen on one side is blocked, the flow direction of the transformer oil can be automatically switched, the filter screen on the other side filters the transformer oil, the blocked filter screen is backwashed, impurities on the filter screen are cleaned, the transformer oil can be filtered for a long time, the maintenance time is greatly prolonged, and the cooling effect of the transformer is greatly improved through the circularly flowing transformer oil.
Drawings
Fig. 1 is a schematic diagram of a front view of an all-insulated outlet power transformer according to the present invention;
fig. 2 is a schematic diagram of a side view of an all-insulated outlet power transformer according to the present invention;
fig. 3 is a schematic structural diagram of a filtering portion in an all-insulated outlet power transformer according to the present invention;
fig. 4 is a schematic structural diagram of the inside of a filtering portion of an all-insulated outlet power transformer according to the present invention;
fig. 5 is a schematic structural diagram of a guide tube in an all-insulated outlet power transformer according to the present invention;
fig. 6 is a schematic structural diagram of a limiting seat in an all-insulated outlet power transformer according to the present invention;
fig. 7 is a schematic structural diagram of the distribution of guide bars in the box body of the fully insulated outlet power transformer according to the present invention.
In the figure: 1. a case; 2. a high voltage bushing; 3. a neutral point bushing; 4. a low pressure oil gas isolation device; 5. a lifting seat; 6. a first hand hole; 7. a second hand hole; 8. an oil storage tank; 9. a cooling box; 10. a heat radiation fan; 11. an oil pump; 12. a filtering part; 121. a housing; 122. an oil outlet pipe; 1221. a connection hole; 123. an oil inlet hole; 124. a spin column; 125. a filter screen; 126. a block; 127. a limit groove; 128. a limit seat; 1281. a rotary groove; 129. a deflector; 130. a poking block; 131. a guide post; 132. a spring; 133. a connecting belt; 134. a connecting pipe; 135. a slag discharge pipe; 136. a collection cylinder; 137. a visual window; 138. a valve; 139. a cover plate; 13. a guide tube; 14. and a guide bar.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-7, a fully insulated outgoing line power transformer comprises a box body 1, wherein a high-voltage sleeve 2, a neutral point sleeve 3 and a low-voltage oil-gas isolation device 4 are arranged on the box body 1, lifting seats 5 are arranged at the bottom ends of the high-voltage sleeve 2 and the neutral point sleeve 3, first hand holes 6 corresponding to the high-voltage sleeve 2 and the neutral point sleeve 3 are arranged on the box body 1, the high-voltage sleeve 2 and the neutral point sleeve 3 are oil-sulfur hexafluoride sleeves, the lifting seats 5 are used for sleeve installation and transformer assembly for measurement and protection, other equipment is connected in a metal closed space through the lifting seats 5, and the transformer is little influenced by natural conditions and small animals;
the guide pipe 13 is obliquely arranged on the box cover at the top end of the box body 1, the guide pipe 13 is connected with the output end of the cooling box 9, guide strips 14 are uniformly distributed on the inner wall of the box body 1, the cooled transformer oil is guided to the other end of the box body 1 by the guide pipe 13, so that the transformer oil in the box body 1 is circulated, and meanwhile, the cooled transformer oil can be guided to the transformer from the side surface by the arrangement of the guide strips 14, so that the side surface performs impact cooling on the transformer, and the cooling effect on the transformer is improved;
the low-pressure oil-gas isolation device 4 adopts epoxy resin to pour a basin-type insulator, the low-pressure oil-gas isolation device 4 comprises a lifting seat 5 fixed on the box body 1 and a low-pressure sleeve arranged in the lifting seat 5, sealing resin is arranged in the secondary lifting seat 5, a second hand hole 7 is arranged on the outer wall of the lifting seat 5, a first hand hole 6 and a second hand hole 7 are used for connecting a body lead wire in the transformer with the sleeve outside the transformer, and three-phase outgoing wires of the low-pressure oil-gas isolation device 4 are arranged in a delta shape, so that the low-pressure oil-gas isolation device is more convenient to connect with external GIL equipment;
meanwhile, an oil storage tank 8 is arranged at the upper end of the tank body 1, a cooling tank 9 is arranged at the end of the tank body 1, the cooling tank 9 is used for cooling transformer oil, a cooling fan 10 is arranged on the cooling tank 9, an oil pump 11 is arranged between the cooling tank 9 and the tank body 1, the transformer oil in the tank body 1 is conveyed into the cooling tank 9 for cooling through the oil pump 11 and is input into the tank body 1 again after being cooled, so that the transformer oil is circulated, and a filtering part 12 is arranged between the oil pump 11 and the cooling tank 9;
the filtering part 12 comprises a shell 121, the shell 121 is cylindrical, oil outlet pipes 122 are arranged on two sides of the shell 121, the oil outlet pipes 122 are connected with the cooling box 9, a connecting hole 1221 is arranged between the oil outlet pipes 122 and the shell 121, an oil inlet hole 123 is formed in one end of the shell 121, the vertical section of the oil inlet hole 123 is square, the oil inlet hole 123 is connected with the output end of the oil pump 11, a rotating column 124 is rotatably arranged in the shell 121, the rotating column 124 is positioned at the center of the shell 121, filter screens 125 are fixed on two sides of the rotating column 124, an angle between the filter screens 125 on two sides is 120 degrees, and a plugging block 126 is arranged at the outer end of the filter screen 125;
it should be noted that:
the inner walls of the two sides of the shell 121 are provided with limit grooves 127, the limit grooves 127 are positioned at the inner sides of the connecting holes 1221, the blocking blocks 126 are installed in the limit grooves 127, the size of the blocking blocks 126 is larger than the inner diameter of the connecting holes 1221, the limit grooves 127 limit the rotation angle of the filter screen 125, when one side blocking block 126 covers the connecting holes 1221, the other side blocking block 126 is staggered with the other side connecting holes 1221, and transformer oil can enter the cooling tank 9 from the oil outlet pipe 122 at the side;
a limiting seat 128 is fixed in the oil inlet hole 123, a guide plate 129 is rotatably arranged on the limiting seat 128, a rotary groove 1281 is formed in the limiting seat 128, a clamping block matched with the rotary groove 1281 is formed in the guide plate 129, the guide plate 129 can rotate for 20 degrees on the limiting seat 128, meanwhile, a gap is formed between one end of the guide plate 129 and the inner wall of the oil inlet hole 123 after rotation, and the reverse flow of the transformer to the filter screen 125 is facilitated;
one side slidable mounting that is close to inlet port 123 inside casing 121 has toggle block 130, toggle block 130's both sides all are provided with spring 132, casing 121's internally mounted has guide post 131, guide post 131 runs through toggle block 130, and the spring 132 cover is established on guide post 131, and toggle block 130's both ends all are provided with connecting band 133, both sides space through connecting band 133 to toggle block 130 is sealed, one end connecting band 133 is connected with column 124, and the other end connecting band 133 and guide plate 129 fixed connection, when an oil pressure increases, can promote toggle block 130 to the opposite side remove, simultaneously through connecting band 133 pulling guide plate 129 rotation, make guide plate 129 lead the filter screen 125 of transformer oil guide opposite side, simultaneously make inside pressure release, and promote toggle block 130 through spring 132 after the pressure release resets.
It should be noted that:
the middle part of the deflector 129 is rotatably connected with the limit seat 128, and one section of the deflector 129 positioned inside the oil inlet hole 123 is longer than the other section, so that transformer oil can conveniently enter the oil inlet hole 123 to push the deflector 129 to rotate and position, and the transformer oil is guided to the filter screen 125.
Meanwhile, two connecting pipes 134 are arranged at the bottom end of the shell 121, the top ends of the connecting pipes 134 extend to the inside of the shell 121, and two cover plates 139 for shielding the connecting pipes 134 are fixed at the inner ends of the guide plates 129 through brackets, wherein when the guide plates 129 rotate, the cover plates 139 on one side are driven to shield the ports of the connecting pipes 134 on one side, and the cover plates 139 on the other side are staggered with the ports of the connecting pipes 134, and the specific state is shown in fig. 4.
Meanwhile, the bottom ends of the two connecting pipes 134 are connected with the same slag discharging pipe 135, a valve 138 is arranged on the slag discharging pipe 135, the bottom end of the slag discharging pipe 135 is in threaded connection with a collecting cylinder 136, a visible window 137 is arranged on the collecting cylinder 136, and the amount of internal impurities can be known through the visible window 137 so as to facilitate timely unscrewing of the collecting cylinder 136 to clean the internal impurities.
In this embodiment: the oil pump 11 is opened, the transformer in the tank body 1 is pumped by the oil pump 11 and then is conveyed into the cooling tank 9, and the cooled transformer is cooled by the cooling fan 10 and flows into the tank body 1 again, so that the transformer oil is circulated, and the cooling effect on the transformer is improved;
between transformer oil gets into cooling tank 9, transformer oil gets into filter unit 12 first, filter the impurity in the transformer oil by filter unit 12, when filtering, transformer oil promotes guide plate 129 and rotates, guide plate 129 is to the inside one side of filter unit 12 to transformer oil, promote filter screen 125 rotation through the velocity of flow of transformer oil, and drive shutoff piece 126 to plug connecting hole 1221, filter transformer oil by filter screen 125 on one side, and the transformer oil after filtering flows out from opposite side oil pipe 122, and after one side filter screen 125 hole is plugged up, the inside oil pressure of its place increases, promote and stir piece 130 to the opposite side slip, simultaneously drive guide plate 129 rotation by connecting band 133, guide transformer oil to the inside opposite side of filter unit 12, and promote filter screen 125 rotation, thereby continue to filter transformer oil by opposite side filter screen 125, simultaneously, filter the impurity on the filter screen 125 is cleared up by the transformer oil that flows to the plug, the impurity that drops flows into in the collection cylinder 136 through connecting pipe 134 and collects, so circulation, can filter transformer oil for a long time, the maintenance duration has been greatly increased.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a full insulation power transformer that is qualified for next round of competitions, includes box (1), be provided with high-pressure sleeve pipe (2) on box (1), neutral point sleeve pipe (3) and low pressure oil gas isolating device (4), and oil storage tank (8) are installed to the upper end of box (1), and cooling tank (9) are installed to the one end of box (1), be provided with radiator fan (10) on cooling tank (9), and be provided with oil pump (11) between cooling tank (9) and box (1), a serial communication port, be provided with filter unit (12) between oil pump (11) and cooling tank (9), filter unit (12) include casing (121), both sides of casing (121) all are provided with oil outlet pipe (122), be provided with connecting hole (1221) between oil outlet pipe (122) and casing (121), and the one end of casing (121) is provided with inlet port (123), and the inside rotation of casing (121) is installed column (124), both sides of column (124) are all fixed with filter screen (125), and the outer end (126) of filter screen (125) are provided with shutoff piece (126);
the novel oil inlet device is characterized in that a limiting seat (128) is fixed in the oil inlet hole (123), a guide plate (129) is rotatably arranged on the limiting seat (128), the middle of the guide plate (129) is rotatably connected with the limiting seat (128), a rotary groove (1281) is formed in the limiting seat (128), a clamping block matched with the rotary groove (1281) is formed in the guide plate (129), a stirring block (130) is slidably arranged on one side, close to the oil inlet hole (123), of the inner part of the shell (121), springs (132) are arranged on two sides of the stirring block (130), connecting belts (133) are arranged at two ends of the stirring block (130), one end of each connecting belt (133) is connected with the rotary column (124), and the other end of each connecting belt (133) is fixedly connected with the guide plate (129);
limiting grooves (127) are formed in the inner walls of the two sides of the shell (121), the limiting grooves (127) are located at the inner sides of the connecting holes (1221), the blocking blocks (126) are installed in the limiting grooves (127), the size of each blocking block (126) is larger than the inner diameter of each connecting hole (1221), and when one blocking block (126) covers the connecting holes (1221), the other blocking block (126) and the connecting holes (1221) are staggered;
the inside of the shell (121) is provided with a guide post (131), the guide post (131) penetrates through the poking block (130), and the spring (132) is sleeved on the guide post (131).
2. A fully insulated outlet power transformer according to claim 1, characterized in that the deflector (129) is located inside the inlet opening (123) at a section longer than the other section.
3. The fully insulated outgoing line power transformer according to claim 1, wherein two connecting pipes (134) are arranged at the bottom end of the housing (121), the top ends of the connecting pipes (134) extend to the inside of the housing (121), and two cover plates (139) for shielding the connecting pipes (134) are fixed at the inner ends of the guide plates (129) through brackets.
4. A fully insulated outgoing line power transformer according to claim 3, characterized in that the bottom ends of the two connecting pipes (134) are connected with a slag discharging pipe (135), a valve (138) is arranged on the slag discharging pipe (135), the bottom end of the slag discharging pipe (135) is connected with a collecting cylinder (136) in a threaded manner, and a visual window (137) is arranged on the collecting cylinder (136).
5. The fully insulated outgoing line power transformer according to claim 1, wherein a guide pipe (13) is obliquely arranged on a box cover at the top end of the box body (1), the guide pipe (13) is connected with the output end of the cooling box (9), and guide strips (14) are uniformly distributed on the inner wall of the box body (1).
6. The fully insulated outgoing line power transformer according to claim 1, wherein the bottom ends of the high-voltage bushing (2) and the neutral point bushing (3) are respectively provided with a lifting seat (5), and the box body (1) is provided with a first hand hole (6) corresponding to the high-voltage bushing (2) and the neutral point bushing (3).
7. A fully insulated outlet power transformer according to claim 6, characterized in that the low-voltage oil-gas isolating device (4) comprises a lifting seat (5) fixed on the box body (1) and a low-voltage bushing mounted inside the lifting seat (5), the inside of the secondary lifting seat (5) is provided with sealing resin, and the outer wall of the lifting seat (5) is provided with a second hand hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310077308.5A CN115810467B (en) | 2023-02-08 | 2023-02-08 | All-insulation outgoing line power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310077308.5A CN115810467B (en) | 2023-02-08 | 2023-02-08 | All-insulation outgoing line power transformer |
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| Publication Number | Publication Date |
|---|---|
| CN115810467A CN115810467A (en) | 2023-03-17 |
| CN115810467B true CN115810467B (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310077308.5A Active CN115810467B (en) | 2023-02-08 | 2023-02-08 | All-insulation outgoing line power transformer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116785818B (en) * | 2023-08-22 | 2023-10-31 | 山东兴达环保科技有限责任公司 | Crude oil separation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960720A (en) * | 2017-04-29 | 2017-07-18 | 太仓市友达电气技术有限公司 | A kind of oil invades formula self-cleaning transformer |
| CN107705964A (en) * | 2017-11-01 | 2018-02-16 | 贵州金林电子科技有限公司 | A kind of oil-filled transformer absolute oil cooling device |
| CN215195597U (en) * | 2021-07-11 | 2021-12-17 | 成都世纪致远机械设备有限公司 | Mechanical filtering equipment |
-
2023
- 2023-02-08 CN CN202310077308.5A patent/CN115810467B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960720A (en) * | 2017-04-29 | 2017-07-18 | 太仓市友达电气技术有限公司 | A kind of oil invades formula self-cleaning transformer |
| CN107705964A (en) * | 2017-11-01 | 2018-02-16 | 贵州金林电子科技有限公司 | A kind of oil-filled transformer absolute oil cooling device |
| CN215195597U (en) * | 2021-07-11 | 2021-12-17 | 成都世纪致远机械设备有限公司 | Mechanical filtering equipment |
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| CN115810467A (en) | 2023-03-17 |
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