CN112103030B - Oil-immersed three-phase transformer - Google Patents
Oil-immersed three-phase transformer Download PDFInfo
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- CN112103030B CN112103030B CN202010993589.5A CN202010993589A CN112103030B CN 112103030 B CN112103030 B CN 112103030B CN 202010993589 A CN202010993589 A CN 202010993589A CN 112103030 B CN112103030 B CN 112103030B
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- fixedly connected
- oil
- box body
- wall
- wind
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- 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
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
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- 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
- H01F27/002—Arrangements provided on the transformer facilitating its transport
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- 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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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- 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
- H01F27/085—Cooling by ambient air
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- 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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- 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
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses an oil-immersed three-phase transformer which comprises a box body, wherein the top of the box body is fixedly connected with a wiring terminal group, the outer walls of the front side and the back side of the box body are fixedly connected with heat dissipation structures, the left end of the box body is fixedly connected with an oil tank, and the top of the oil tank is fixedly connected with an oil conservator. Through the special structure of the arranged wind guide strips, when wind blows, the speed of the cambered surface of the wind guide strips far away from the box body and flowing through the air flow is higher, the speed of the air flow flowing through the smooth surface of the wind guide strips close to the box body is relatively lower, an air pressure difference is formed, the air of the wind guide strips close to the box body is gushed towards one side of the arc of the wind guide strips, a vortex is formed, one side of a radiating fin close to the box body is accelerated to radiate heat, the two wind guide plates are opposite in flow guide direction, the wind guide plates in the opposite directions of the wind guide plates on the two sides can guide the blown wind to the inside of the heat radiating structure and lead out from the other end, so that the wind can be guided up and down when the vortex is formed, and the heat radiating effect is better.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to an oil-immersed three-phase transformer.
Background
The oil-immersed three-phase transformer adopts a fully-oil-filled sealed corrugated oil tank shell, and adopts a permanently-sealed oil tank by adapting to the expansion of oil through self elasticity, the oil-immersed three-phase transformer is widely applied to various distribution equipment, and the core part of the oil-immersed three-phase transformer consists of a closed iron core and a winding sleeved on an iron core column. In addition, there are oil tank, oil conservator, sleeve pipe, respirator, explosion-proof pipe, radiator, tap switch, buchholz relay, thermometer, oil purifier etc. but traditional oily formula three-phase transformer's structure is simple, has following shortcoming:
1. the traditional oil-immersed three-phase transformer generally measures the temperature externally, and the measured temperature is inaccurate as the temperature of oil temperature transmitted to a shell;
2. the heat dissipation structure of the traditional oil-immersed three-phase transformer is generally a uniformly-arranged heat dissipation fin structure, the surface area of the heat dissipation fin structure is increased to cool and dissipate the internal oil, the transformer is generally placed outdoors, although the contact area of the heat dissipation fins and the air is increased, the air in the area between the heat dissipation fins is not circulated under the condition of wind, and the heat dissipation effect is general;
3. the bottom of traditional oil-immersed three-phase transformer all generally has the base to be used for supporting, nevertheless because the transformer is very heavy, be not convenient for to its transport, and because rocking of vehicle when the transportation, very easily lead to heat radiation structure and box atress to damage, cause some unnecessary losses.
Disclosure of Invention
The invention aims to provide an oil-immersed three-phase transformer, and the oil-immersed three-phase transformer is used for solving the problems that the temperature measured by a sensor is not accurate, the radiating effect of radiating fins is general, and the transportation and transportation are inconvenient in the use process of the existing oil-immersed three-phase transformer in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an oil-immersed three-phase transformer comprises a box body, wherein the top of the box body is fixedly connected with a wiring terminal group, the outer walls of the front side and the back side of the box body are fixedly connected with a heat dissipation structure, the left end of the box body is fixedly connected with an oil tank, the top of the oil tank is fixedly connected with an oil conservator, the outer wall of the oil conservator is provided with an oil level window, the bottom of the tank body is fixedly connected with two parallel bottom feet, the two ends of the bottom foot are both fixedly connected with anti-collision blocks, the outer wall of the oil tank close to the bottom of the oil conservator is fixedly connected with a signal processing and transmitting device, the top of the oil conservator is fixedly connected with an oil level sensor, the outer walls of the oil tank and the tank body are both fixedly connected with signal temperature sensors, the oil level sensor is arranged on the outer wall of the box body, the signal type temperature sensor and the oil level sensor are electrically connected with the signal processing and transmitting device through arranged wires, and the bottom of the outer wall of the box body is fixedly connected with an oil drain valve.
Preferably, the heat radiation structure comprises a heat conduction seat inside, the outer wall of the heat conduction seat is fixedly connected with the outer wall of the box body, the outer wall of the heat radiation structure far away from the box body is fixedly connected with two symmetrically arranged heat radiation fins, and the cross section of each heat radiation fin is in a 7-shaped shape.
Preferably, the top of the anti-collision block is provided with an air hole, two identical springs are arranged inside the anti-collision block, one end of each spring is fixedly connected with the inner wall, close to the bottom foot, of the anti-collision block, and the other end of each spring is fixedly connected with the inner wall, far away from the bottom foot, of the anti-collision block.
Preferably, the outer walls of the signal type temperature sensor and the oil level sensor are fixedly connected with sealing rings.
Preferably, the radiating fins are fixedly connected with spacers close to the outer wall of the box body.
Preferably, the upper end and the lower end of the heat dissipation structure are fixedly connected with wind shielding sheets.
Preferably, the top fixedly connected with two rings of box, the inner wall of footing rotates and is connected with the gyro wheel, the outer wall fixedly connected with clutch blocks that the footing was kept away from to the anticollision piece.
Preferably, the other end of the radiating fin, which is far away from the heat conducting seat, is fixedly connected with an air guide strip, and the outer wall of the air guide strip, which is far away from the box body, is arc-shaped.
Compared with the prior art, the invention has the beneficial effects that:
1. the copper heat conducting seat conducts heat to the radiating fins rapidly through the arranged heat conducting seat, according to the aerodynamic principle, when wind blows, the speed of air flow flowing through the cambered surface of the air guiding strip away from the box body is higher, the speed of air flow flowing through the smooth surface of the air guiding strip close to the box body is relatively lower, an air pressure difference is formed, air flowing through the air guiding strip close to the box body is rushed towards one side of the arc of the air guiding strip, a vortex is formed, one side of the radiating fins close to the box body is accelerated to dissipate heat, the wind blocking pieces in the opposite directions of wind guiding on two sides can guide the blown wind to the inside of the radiating structure and lead out from the other end, the wind can be guided up and down while the vortex is formed, and the 7-shaped structures of the radiating fins which are symmetrically arranged can enable the wind in any direction to blow to achieve the effect of strong heat dissipation effect.
2. Through the signal formula temperature sensor who sets up, the oil level sensor all adopts the formula of probing to measure, can direct measurement oil temperature and oil level, it is more accurate to measure, and report to the police through signal processing emitter when the index is unusual, more the sealing ring has been added on signal formula temperature sensor and oil level sensor's outer wall, the sealing ring is thirty degrees with measuring device's inner wall, be similar to the bowl form, when the inside of oil tank, the space between oil tank and the measuring device can be stopped up to the shrink of sealing ring, prevent that oil from leaking outward, and the sealing ring is when the edge of oil tank inner wall, will be like the sucking disc like the inside of adsorbing at the oil tank again, further sealed to it, make sealed effectual, in order to reach and measure accurate effect.
3. The gyro wheel through the footing inside that sets up can be convenient for the removal of device, the part that stretches out at the footing both ends prevents that heat radiation structure from receiving the collision, and the inside spring of anticollision piece can play the effect of buffering through the deformation of self, and anticollision piece is made for elastic rubber, be similar to an gasbag, when the collision, the inside air of anticollision piece will release slowly through the gas pocket, play a cushioning effect, in order to slow down the release of the elasticity potential energy of spring, prevent that the device from being flicked by the spring and causing the unnecessary accident, the clutch blocks can be protected the anticollision piece, prevent that the clutch blocks is impaired, in order to reach the effect of the transportation of being convenient for.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the present invention in the front view direction;
FIG. 3 is a schematic bottom view of the present invention;
FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;
FIG. 5 is a schematic cross-sectional view of the crash block of the present invention;
FIG. 6 is a schematic cross-sectional view of a heat dissipation structure of the present invention;
FIG. 7 is a schematic view of the sealing ring of the present invention in use.
In the figure: 1. a box body; 2. an oil tank; 3. an oil conservator; 301. an oil level window; 4. footing; 401. a roller; 5. a heat dissipation structure; 501. a heat conducting base; 502. a heat sink; 503. a spacer; 504. wind guide strips; 505. a wind-shielding sheet; 6. a terminal group; 7. a signal processing and transmitting device; 8. an anti-collision block; 801. air holes; 802. a friction block; 803. a spring; 9. a seal ring; 10. a signal type temperature sensor; 11. an oil level sensor; 12. a hoisting ring; 13. oil drain valve.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides an oil-immersed three-phase transformer, the power distribution box comprises a box body 1, box 1's top fixedly connected with binding post group 6, the outer wall fixedly connected with heat radiation structure 5 of box 1's tow sides, box 1's left end fixedly connected with oil tank 2, the top fixedly connected with conservator 3 of oil tank 2, oil level window 301 has been seted up to the outer wall of conservator 3, two footing 4 that are parallel to each other of box 1's bottom fixedly connected with, the equal fixedly connected with anticollision piece 8 in both ends of footing 4, the outer wall of oil tank 2 is close to the bottom fixedly connected with signal processing emitter 7 of conservator 3, the top fixedly connected with oil level sensor 11 of conservator 3, the equal fixedly connected with signal formula temperature sensor 10 of outer wall of oil tank 2 and box 1, signal formula temperature sensor 10 and oil level sensor 11 are through the wire and the 7 electric connection of signal processing emitter that set up, the bottom fixedly connected with drain valve 13 of box 1 outer wall.
In this embodiment, all adopt the formula of probing to measure through signal formula temperature sensor 10, oil level sensor 11, can directly measure the temperature and the oil level of oil, measure more accurately to report to the police through signal processing emitter 7 when the index is unusual.
Specifically, the heat dissipation structure 5 includes a heat conduction seat 501 inside, the outer wall of the heat conduction seat 501 is fixedly connected with the outer wall of the box body 1, the outer wall of the heat dissipation structure 5 far away from the box body 1 is fixedly connected with two symmetrically arranged heat dissipation fins 502, and the cross section of each heat dissipation fin 502 is in a 7-shaped shape.
In this embodiment, the 7-shaped structure of the symmetrically arranged fins 502 can accelerate air circulation when the air is blown in any direction.
Specifically, the top of the anti-collision block 8 is provided with an air hole 801, two identical springs 803 are arranged inside the anti-collision block 8, one end of each spring 803 is fixedly connected with the inner wall, close to the bottom foot 4, of the anti-collision block 8, and the other end of each spring 803 is fixedly connected with the inner wall, far away from the bottom foot 4, of the anti-collision block 8.
In this embodiment, the spring 803 inside the anti-collision block 8 can play a role of buffering through its own deformation, and the anti-collision block 8 is made of elastic rubber, similar to an air bag, and during collision, air inside the anti-collision block 8 will be slowly released through the air hole 801 to play a role of buffering, so as to slow down the release of the elastic potential energy of the spring 803, and prevent the device from being bounced off by the spring 803 to cause unnecessary accidents.
Specifically, the outer walls of the signal temperature sensor 10 and the fuel level sensor 11 are fixedly connected with a sealing ring 9.
In this embodiment, sealing ring 9 is thirty degrees with measuring device's inner wall, is similar to the bowl form, and when the inside department of oil tank 2, the space between oil tank 2 and the measuring device can be plugged up to sealing ring 9's shrink, prevents that oil from leaking outward, and sealing ring 9 when the edge of 2 inner walls of oil tank, will adsorb in the inside of oil tank 2 like the sucking disc again, to its further sealed for sealed effectual, in order to reach and measure accurate effect.
Specifically, the heat sink 502 is fixedly connected with a spacer 503 near the outer wall of the box body 1.
In this embodiment, the spacer 503 can increase the contact area of the heat sink 502 with air and divide the area of the heat sink 502 near the case 1 into smaller areas, so as to facilitate the formation of eddy currents when wind blows.
Specifically, the upper end and the lower end of the heat dissipation structure 5 are both fixedly connected with a wind shielding sheet 505.
In this embodiment, the flow guiding directions of the two wind-blocking sheets 505 are opposite, and the wind-blocking sheets 505 with opposite wind-guiding directions on the two sides can guide the blown wind to the inside of the heat dissipation structure 5 and lead the blown wind out from the other end, so that the wind can be guided up and down while forming a vortex, and the heat dissipation effect is better.
Specifically, two rings 12 are fixedly connected to the top of the box body 1, the inner wall of the bottom foot 4 is rotatably connected with a roller 401, and the outer wall of the bottom foot 4 away from the anti-collision block 8 is fixedly connected with a friction block 802.
In this embodiment, rings 12 can be convenient for the handling to the device, and clutch blocks 802 can protect anticollision piece 8, prevents that clutch blocks 802 from damaging to reach the effect of being convenient for transport.
Specifically, the other end of the heat sink 502 away from the heat conducting base 501 is fixedly connected with an air guide strip 504, and the outer wall of the air guide strip 504 away from the box body 1 is arc-shaped.
In this embodiment, according to the aerodynamic principle, when wind blows, the speed of the air flow flowing through the arc surface of the wind guide strip 504 away from the box body 1 is higher, while the speed of the air flow flowing through the smooth surface of the wind guide strip 504 close to the box body 1 is relatively lower, so as to form an air pressure difference, the air of the wind guide strip 504 close to the box body 1 flows towards one side of the arc of the wind guide strip 504, so as to form a vortex, and the heat dissipation of the heat dissipation fins 502 close to the box body 1 is accelerated.
The working principle and the using process of the invention are as follows: the temperature generated by the transformer during operation is conducted to the heat dissipation structure 5 through the box body 1, and the heat is quickly conducted to the heat dissipation fins 502 through the copper heat conduction seat 501, according to the aerodynamic principle, when wind blows, the speed of the air flowing through the cambered surface of the wind guide strip 504 far away from the box body 1 is higher, the speed of the air flowing through the smooth surface of the wind guide strip 504 near the box body 1 is relatively lower, an air pressure difference is formed, the air of the wind guide strip 504 near the box body 1 is rushed towards one side of the arc of the wind guide strip 504 to form a vortex, the heat dissipation of one side of the heat dissipation fins 502 near the box body 1 is accelerated, the wind blocking sheets 505 in the opposite wind guiding directions on the two sides can guide the blown wind into the heat dissipation structure 5 and lead out from the other end, so that the wind can be guided up and down while forming the vortex, and the air flow can be accelerated by the wind blowing in any direction through the '7-shaped structure' of the symmetrically arranged heat dissipation fins 502, so as to achieve the effect of strong heat dissipation effect, and the signal type temperature sensor 10, the oil level sensor 11 all adopt the probing type measurement, can directly measure the temperature and the oil level of the oil, the measurement is more accurate, and the alarm is given through the signal processing emitter 7 when the index is abnormal, furthermore, the sealing ring 9 is added on the outer wall of the signal type temperature sensor 10 and the oil level sensor 11, the sealing ring 9 and the inner wall of the measuring device are thirty degrees, which is similar to a bowl shape, when the inner part of the oil tank 2 is located, the contraction of the sealing ring 9 can block the gap between the oil tank 2 and the measuring device, and the oil is prevented from leaking outside, and when the sealing ring 9 is at the edge of the inner wall of the oil tank 2, the sealing ring can be adsorbed inside the oil tank 2 like a sucking disc, further sealed, so that the sealing effect is good, so as to achieve the effect of accurate measurement, the roller 401 inside the footing 4 can be convenient for the movement of the device during transportation, the parts that the both ends of footing 4 are stretched out prevent that heat radiation structure 5 from receiving the collision, and the inside spring 803 of anticollision piece 8 can play the effect of buffering through the deformation of self, and anticollision piece 8 is made for elastic rubber, similar to an gasbag, when the collision, the inside air of anticollision piece 8 will release slowly through gas pocket 801, play a cushioning effect, in order to slow down the release of the elastic potential energy of spring 803, prevent that the device from being bounced by spring 803 and causing unnecessary accident, clutch blocks 802 can protect anticollision piece 8, prevent that clutch blocks 802 is impaired, in order to reach the effect of the transportation of being convenient for.
Claims (1)
1. The utility model provides an oil-immersed three-phase transformer, includes box (1), its characterized in that: the improved oil tank is characterized in that a wiring terminal group (6) is fixedly connected to the top of the tank body (1), heat dissipation structures (5) are fixedly connected to the outer walls of the positive side and the negative side of the tank body (1), an oil tank (2) is fixedly connected to the left end of the tank body (1), an oil conservator (3) is fixedly connected to the top of the oil tank (2), an oil level window (301) is formed in the outer wall of the oil conservator (3), two mutually parallel bottom feet (4) are fixedly connected to the bottom of the tank body (1), anti-collision blocks (8) are fixedly connected to the two ends of the bottom feet (4), a signal processing and transmitting device (7) is fixedly connected to the bottom of the oil conservator (3) close to the outer wall of the oil tank (2), an oil level sensor (11) is fixedly connected to the top of the oil conservator (3), and signal type temperature sensors (10) are fixedly connected to the outer walls of the oil tank body (2) and the tank body (1), the signal type temperature sensor (10) and the oil level sensor (11) are electrically connected with the signal processing and transmitting device (7) through arranged wires, and the bottom of the outer wall of the box body (1) is fixedly connected with an oil drain valve (13);
the heat dissipation structure (5) comprises a heat conduction seat (501) inside, the outer wall of the heat conduction seat (501) is fixedly connected with the outer wall of the box body (1), the outer wall of the heat dissipation structure (5) far away from the box body (1) is fixedly connected with two symmetrically arranged radiating fins (502), and the cross section of each radiating fin (502) is 7-shaped;
an air hole (801) is formed in the top of the anti-collision block (8), two identical springs (803) are arranged inside the anti-collision block (8), one end of each spring (803) is fixedly connected with the inner wall, close to the bottom foot (4), of the anti-collision block (8), and the other end of each spring (803) is fixedly connected with the inner wall, far away from the bottom foot (4), of the anti-collision block (8);
the outer walls of the signal type temperature sensor (10) and the oil level sensor (11) are fixedly connected with sealing rings (9);
the outer wall of the radiating fin (502) close to the box body (1) is fixedly connected with a spacer (503);
the upper end and the lower end of the heat dissipation structure (5) are fixedly connected with wind shielding sheets (505);
the top of the box body (1) is fixedly connected with two lifting rings (12), the inner wall of the bottom foot (4) is rotatably connected with a roller (401), and the outer wall, far away from the bottom foot (4), of the anti-collision block (8) is fixedly connected with a friction block (802);
the other end of the radiating fin (502) far away from the heat conducting seat (501) is fixedly connected with an air guide strip (504), and the outer wall of the air guide strip (504) far away from the box body (1) is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993589.5A CN112103030B (en) | 2020-09-21 | 2020-09-21 | Oil-immersed three-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993589.5A CN112103030B (en) | 2020-09-21 | 2020-09-21 | Oil-immersed three-phase transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112103030A CN112103030A (en) | 2020-12-18 |
| CN112103030B true CN112103030B (en) | 2021-11-23 |
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| CN202010993589.5A Expired - Fee Related CN112103030B (en) | 2020-09-21 | 2020-09-21 | Oil-immersed three-phase transformer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506673B (en) * | 2021-09-10 | 2021-11-16 | 南通市海王电气有限公司 | Transformer |
| CN116110685B (en) * | 2023-03-24 | 2023-09-01 | 鲁特电工股份有限公司 | Power transformer fault diagnosis device |
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| CN2747621Y (en) * | 2004-10-14 | 2005-12-21 | 上海环达计算机科技有限公司 | Radiation module with air radiation fins structure |
| CN201662338U (en) * | 2009-12-03 | 2010-12-01 | 宁波宁兴金海水暖器材有限公司 | Radiating unit of composite radiator |
| CN202791901U (en) * | 2012-08-17 | 2013-03-13 | 徐州格利尔数码科技有限公司 | Radiating shell for LED (Light-Emitting Diode) street lamp |
| CN203466020U (en) * | 2013-08-30 | 2014-03-05 | 申大变压器有限公司 | Oil-immersed transformer |
| CN206221363U (en) * | 2016-11-28 | 2017-06-06 | 温岭市家用电机厂 | A kind of motor blower fan |
| CN206664525U (en) * | 2017-03-22 | 2017-11-24 | 郑州坤达电子科技有限公司 | A kind of collision damper for car |
| CN108019847A (en) * | 2017-11-22 | 2018-05-11 | Tcl空调器(中山)有限公司 | Outlet housing and air-conditioner outdoor unit |
| CN208062966U (en) * | 2018-04-13 | 2018-11-06 | 南方英特空调有限公司 | A kind of novel brushless motor heat radiating fin structure |
| CN208564106U (en) * | 2018-07-25 | 2019-03-01 | 南京车立方智能交通科技有限公司 | A kind of anticollision device, collision-prevention device of automobile carrier |
| CN210668065U (en) * | 2019-11-15 | 2020-06-02 | 上海昌鹭智能技术有限公司 | Transformer on-line temperature detection device |
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