CN219676998U - Buffer structure of dry-type transformer - Google Patents
Buffer structure of dry-type transformer Download PDFInfo
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- CN219676998U CN219676998U CN202223144221.5U CN202223144221U CN219676998U CN 219676998 U CN219676998 U CN 219676998U CN 202223144221 U CN202223144221 U CN 202223144221U CN 219676998 U CN219676998 U CN 219676998U
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- type transformer
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- sleeve plate
- transformer body
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- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims description 36
- 238000007906 compression Methods 0.000 claims description 36
- 230000007704 transition Effects 0.000 claims description 31
- 230000026683 transduction Effects 0.000 claims description 17
- 238000010361 transduction Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 2
- 230000003139 buffering effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model relates to the technical field of dry transformers, and discloses a buffer structure of a dry transformer, which comprises a dry transformer body, wherein support bases are fixedly arranged at the bottoms of two sides of the dry transformer body, abdication holes are formed in the inner sides of the bottoms of the support bases, an auxiliary sleeve plate is fixedly connected between the bottoms of the two support bases, and a pressure detection part is sleeved on the inner side of the middle part of the auxiliary sleeve plate. After the pressure detection component is combined with the dry type transformer body, when the dry type transformer body is subjected to vibration, the I-shaped rod in the pressure detection component synchronously conducts and extrudes the pressure sensor and transmits a pressure signal to the pressure sensor, the stable state of the dry type transformer body is obtained in real time, and then after the main buffer structure and the synchronous auxiliary buffer structure are failed, the force of the I-shaped rod extrusion pressure sensor is increased and exceeds the preset value of the internal controller body, and then an internal alarm gives an early warning prompt.
Description
Technical Field
The utility model relates to the technical field of dry transformers, in particular to a buffer structure of a dry transformer.
Background
The existing dry-type transformer has the advantages of strong short-circuit resistance, small maintenance workload, high operation efficiency, small volume, low noise and the like, and is therefore commonly used in places with high performance requirements such as fire prevention, explosion prevention and the like, such as local illumination, high-rise buildings, airports, wharf CNC mechanical equipment and the like, but because the supporting structure of the existing installation fixed dry-type transformer is mainly a hard connection structure, the buffer performance of the dry-type transformer after encountering vibration is poor, the utility model patent of CN211788502U is provided for further improvement, the utility model discloses a shock-proof dry-type transformer which comprises a dry-type transformer body and a dry-type transformer base, a supporting seat is arranged at the bottom of the dry-type transformer base, a plurality of rectangular drainage through grooves are formed in the end face of the supporting seat, a shock-absorbing supporting component is arranged on the end face of the dry-type transformer base and corresponds to the rectangular drainage through grooves, the shock-absorbing supporting component comprises an upper mounting plate, a lower mounting plate, a rectangular fixing sleeve and a shock-absorbing plate, the dry-absorbing plate is sleeved inside the rectangular fixing sleeve, the shock-absorbing plate is arranged on the end face of the mounting plate, and the shock-absorbing plate is arranged on the bottom of the mounting plate. During the use, through set up shock attenuation board buffer structure between dry-type transformer body and dry-type transformer base, and then solved because dry-type transformer mount pad direct mount is at dry-type transformer body to dry-type transformer mount pad is the support body structure, thereby at the in-process of installation or because when slight earthquake, lead to inner structure to receive the problem that the vibration force leads to inside electronic component to drop, avoided dry-type transformer impaired, and then guaranteed dry-type transformer's life.
As is clear from the above disclosure, the core solution for improving the buffering performance of the dry-type transformer in the prior art is realized by using the reciprocating deformation of the elastic material, but in the practical use process, we find that the time for buffering the vibration energy by using the reciprocating deformation of the elastic material is longer and the effect is general, and the reason is that the vibration energy is converted into other energy in a single way, the buffering essence is that the vibration energy is quickly converted into other energy, the better buffering effect can be realized after the ways are diversified, namely, the device is faster and stable, and furthermore, the process of buffering the vibration energy by using the reciprocating deformation of the elastic material abrades the elastic material itself, so that the buffering effect is gradually reduced along with the extension of the use time, but the change cannot be directly reflected in the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a buffer structure of a dry-type transformer, which solves the problems proposed by the background art.
The utility model provides the following technical scheme: the buffer structure of the dry-type transformer comprises a dry-type transformer body, wherein supporting bases are fixedly arranged at the bottoms of two sides of the dry-type transformer body, a yielding hole is formed in the inner side of the bottoms of the supporting bases, an auxiliary sleeve plate is fixedly connected between the bottoms of the two supporting bases, a pressure detection part is sleeved on the inner side of the middle part of the auxiliary sleeve plate, and the top of the pressure detection part is attached to the surface of the bottom of the dry-type transformer body;
the two sides of the bottom of the dry-type transformer body are connected with elastic conduction structures, the movable end of the bottom structure of each elastic conduction structure is connected with a transduction buffer structure, and the transduction buffer structures are arranged on the inner wall of the auxiliary sleeve plate;
the top of transduction buffer structure one end is connected with the transition top depression bar, and the one end laminating of transition top depression bar is connected with the piston member, the outside joint of piston member one end has the transition pipe, the one end through connection of transition pipe has T type sleeve pipe, and the laminating of T type sheathed tube top and the surface of dry-type transformer body bottom is connected.
The pressure detection device is characterized in that a fixed sleeve is arranged in the pressure detection component, an I-shaped rod, a pressure sensor and a second compression spring are sleeved on the inner side of the fixed sleeve respectively, one ends of the bottom of the pressure sensor and the bottom of the second compression spring are arranged on the inner wall of the auxiliary sleeve plate, one end of the bottom of the I-shaped rod is clamped on the inner side of the top of the fixed sleeve, the end face of one end of the bottom of the fixed sleeve is fixedly connected with the other end of the second compression spring respectively, the end face of one end of the bottom of the fixed sleeve is in fit connection with the pressed face of the pressure sensor, and the bottom of the fixed sleeve is fixedly connected with the inner wall of the auxiliary sleeve plate.
The elastic conduction structure is selected and consists of a fixed block and a first compression spring fixedly connected with the surface of the bottom of the fixed block, the top of the fixed block is fixedly connected with the surface of the bottom of the dry-type transformer body, the first compression spring is of an inclined structure, and one end of the first compression spring is used as a movable end of the whole structure of the elastic conduction structure.
Selecting, the inner side of the transduction buffer structure is provided with a reciprocating sleeve plate, the inner side of the reciprocating sleeve plate is clamped with a friction plate, the bottom structures at two ends of the friction plate are fixedly connected with the inner wall of the auxiliary sleeve plate, and the top of the other end of the reciprocating sleeve plate is fixedly connected with one end of the first compression spring.
The transition top pressure bar is of an L-shaped structure, the other end of the transition top pressure bar is fixedly connected with the top of one end of the reciprocating sleeve plate, and one end of the transition top pressure bar is of a hemispherical structure.
The piston rod piece is characterized in that a T-shaped rod is arranged on the inner side of the piston rod piece, a piston block is fixedly connected to the end head of one end of the T-shaped rod, a sealing ring for a shaft is sleeved on the surface of the middle part of the T-shaped rod, the piston block and the sealing ring for the shaft are sleeved on the inner side of the other end of the transition pipe, a third compression spring is fixedly arranged between the surface of the other end of the T-shaped rod and the end face of the other end of the transition pipe, and the surface of the middle part of the transition pipe is fixedly connected with the inner wall of the auxiliary sleeve plate.
Carefully chosen, T-shaped yielding space is arranged on the inner side of the T-shaped sleeve, and insulating cooling oil is arranged in the T-shaped yielding space.
The controller is characterized in that a controller body, a storage battery and an alarm are arranged in the controller component, and the controller body is electrically connected with a pressure sensor in the pressure detection component through a wire.
Compared with the prior art, the utility model has the following beneficial effects:
1. after the auxiliary sleeve plate, the elastic conduction structure and the transduction buffer structure are assembled to form the main buffer structure, the transition top compression rod, the piston rod piece, the transition pipe and the T-shaped sleeve are assembled to form the synchronous auxiliary buffer structure, the main buffer structure, the synchronous auxiliary buffer structure and the dry-type transformer body and the support base are comprehensively used, the dry-type transformer body is subjected to vibration, the elastic conduction structure is firstly conducted to the transduction buffer structure, the reciprocating sleeve plate is enabled to reciprocate along the friction plate, then part of vibration energy is converted into heat energy, the reciprocating sleeve plate in a moving state synchronously drives the transition top compression rod, then the transition top compression rod piece pushes the piston rod piece to extrude the inner space of the transition pipe and the T-shaped sleeve, part of vibration energy is converted into lifting kinetic energy of insulating cooling liquid in the T-shaped sleeve, the two energy conversions are reciprocating and continuous until the vibration energy is completely replaced, and compared with the prior art, the buffering effect can be rapidly realized through multiple buffering ways.
2. According to the utility model, the synchronous auxiliary buffer structure is formed by assembling the transition top pressure rod, the piston rod piece, the transition pipe and the T-shaped sleeve, and besides the energy conversion buffer effect, the insulating cooling liquid arranged in the T-shaped sleeve can also assist the heat dissipation operation of the dry-type transformer body through the T-shaped sleeve, so that the application range of the structure is further expanded, and the use effect is improved.
3. After the pressure detection component is combined with the dry type transformer body, when the dry type transformer body is subjected to vibration, the I-shaped rod in the pressure detection component synchronously conducts and extrudes the pressure sensor and transmits a pressure signal to the pressure sensor, the stable state of the dry type transformer body is obtained in real time, then after the main buffer structure and the synchronous auxiliary buffer structure are failed, the force of the I-shaped rod extrusion pressure sensor is increased and exceeds the preset value of the internal controller body, and then an internal alarm gives an early warning prompt, so that an operation condition is provided for timely maintenance of workers, and further the equipment failure loss is reduced.
Drawings
FIG. 1 is a schematic elevational view of the structure of the present utility model;
FIG. 2 is a schematic rear view of the structure of the present utility model;
FIG. 3 is a schematic cross-sectional view of a piston rod member according to the present utility model;
fig. 4 is an enlarged schematic view of the structure of the present utility model at a in fig. 3.
In the figure: 1. a dry-type transformer body; 2. a support base; 3. an auxiliary sleeve plate; 4. an elastic conductive structure; 41. a fixed block; 42. a first compression spring; 5. a transduction buffer structure; 51. a reciprocating sleeve plate; 52. a friction plate; 6. a pressure detecting section; 61. fixing the sleeve; 62. an I-shaped rod; 63. a pressure sensor; 64. a second compression spring; 7. a transitional pressing rod is pushed; 8. a piston rod member; 81. a T-shaped rod; 82. a piston block; 83. a third compression spring; 84. sealing rings for shafts; 9. a transition pipe; 10. a T-shaped sleeve; 11. a controller component.
Detailed Description
The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, 2 and 4, a buffer structure of a dry transformer includes a dry transformer body 1, a support base 2 is fixedly installed at the bottom of two sides of the dry transformer body 1, a yielding hole is provided at the inner side of the bottom of the support base 2, an auxiliary sleeve plate 3 is fixedly connected between the bottoms of the two support bases 2, a pressure detecting component 6 is sleeved at the inner side of the middle part of the auxiliary sleeve plate 3, the top of the pressure detecting component 6 is attached to the surface of the bottom of the dry transformer body 1, a fixing sleeve 61 is provided in the interior of the pressure detecting component 6, an i-shaped rod 62, a pressure sensor 63 and a second compression spring 64 are sleeved at the inner side of the fixing sleeve 61, one end of the bottom of the pressure sensor 63 and one end of the bottom of the second compression spring 64 are installed on the inner wall of the auxiliary sleeve plate 3, one end of the bottom of the i-shaped rod 62 is attached to the inner side of the top of the fixing sleeve 61, the end face of the bottom of the fixing sleeve 61 is fixedly connected with the other end of the second compression spring 64, the bottom of the fixing sleeve 61 is fixedly connected with the pressure receiving face of the pressure sensor 63, the bottom of the fixing sleeve 61 and the inner wall of the auxiliary sleeve plate 3 are fixedly connected with the inner wall of the controller 11, and the controller, the controller is provided with the pressure sensor 63 and the inner controller and the pressure sensor 63 are electrically connected with the pressure sensor 6 through wires.
When the dry type transformer is used, after the pressure detection component 6 and the controller component 11 are combined with the dry type transformer body 1, when the dry type transformer body 1 is subjected to vibration, the I-shaped rod 62 in the pressure detection component 6 synchronously conducts and extrudes the pressure sensor 63 and transmits a pressure signal to the controller component 11, the stable state of the dry type transformer body 1 is obtained in real time, then after the main buffer structure and the synchronous auxiliary buffer structure are failed, the force of the I-shaped rod 62 extruded the pressure sensor 63 is increased and exceeds the preset value of the controller body in the controller component 11, and then an alarm in the controller component 11 gives an early warning prompt, so that the operation condition is provided for timely maintenance of workers, and the equipment failure loss is reduced.
Referring to fig. 1, 2 and 3, two sides of the bottom of the dry-type transformer body 1 are connected with an elastic conduction structure 4, the elastic conduction structure 4 is composed of a fixed block 41 and a first compression spring 42 fixedly connected with the surface of the bottom of the fixed block 41, the top of the fixed block 41 is fixedly connected with the surface of the bottom of the dry-type transformer body 1, the first compression spring 42 is of an inclined structure, one end of the first compression spring 42 is used as a movable end of the integral structure of the elastic conduction structure 4, the elastic conduction structure 4 conducts vibration energy of the dry-type transformer body 1 synchronously, the movable end of the bottom structure of the elastic conduction structure 4 is connected with a transduction buffer structure 5, the transduction buffer structure 5 is mounted on the inner wall of the auxiliary sleeve plate 3, a reciprocating sleeve plate 51 is arranged on the inner side of the transduction buffer structure 5, friction plates 52 are clamped on the inner sides of the reciprocating sleeve plate 51, the bottom structures at two ends of the friction plates 52 are fixedly connected with the inner wall of the auxiliary sleeve plate 3, and the top of the other end of the reciprocating sleeve plate 51 is fixedly connected with one end of the first compression spring 42, and the transduction buffer structure 5 receives energy of the elastic structure 4 and conducts energy synchronously.
In use, when the dry-type transformer body 1 is subjected to vibration, the vibration is firstly transmitted to the transduction buffer structure 5 by the elastic transmission structure 4, so that the reciprocating sleeve plate 51 rubs reciprocally along the friction plate 52, and then part of vibration energy is converted into heat energy, and the energy conversion is reciprocating and continuous.
Referring to fig. 3 and 4, the top of one end of the transduction buffer structure 5 is connected with a transitional top compression rod 7, the transitional top compression rod 7 is in an L-shaped structure, the other end of the transitional top compression rod 7 is fixedly connected with the top of one end of the reciprocating sleeve plate 51, one end of the transitional top compression rod 7 is in a hemispherical structure, the transitional top compression rod 7 shares vibration energy received by the reciprocating sleeve plate 51, excessive abrasion of the reciprocating sleeve plate 51 is avoided, one end of the transitional top compression rod 7 is connected with a piston rod 8 in a fitting manner, the outer side of one end of the piston rod 8 is clamped with a transitional pipe 9, the inner side of the piston rod 8 is provided with a T-shaped rod 81, the end of one end of the T-shaped rod 81 is fixedly connected with a piston block 82, the surface of the middle part of the T-shaped rod 81 is sleeved with a shaft sealing ring 84, the piston block 82 and the shaft sealing ring 84 are sleeved on the inner side of the other end of the transitional pipe 9, a third compression spring 83 is fixedly arranged between the surface of the other end of the T-shaped rod 81 and the end surface of the other end of the transitional pipe 9, the middle part of the transitional pipe 9 is fixedly connected with the inner wall of the auxiliary sleeve plate 3, the piston rod 8 is provided with a reciprocating movement condition and can make way to the inner side space of the transitional pipe 9, the inner side space of the transitional pipe is movably communicated with the T-shaped sleeve pipe 9, the inner side space is provided with a T-shaped 10, and the inner side of the dry-shaped oil sleeve is connected with the inner side 10 of the dry-type oil-type sleeve type cooling sleeve body, and the dry-type oil-type device is in a position-shaped space is connected with the top 10, and the top space is provided with the top space of the dry-shaped casing 10.
When the device is used, the reciprocating sleeve plate 51 receiving the vibration energy and moving in a moving state synchronously drives the transition pressing rod 7, so that the transition pressing rod 7 pushes the piston rod piece 8 to squeeze the inner space of the transition pipe 9 and the T-shaped sleeve 10, part of the vibration energy is converted into the lifting kinetic energy of the insulating cooling liquid in the T-shaped sleeve 10, and the energy conversion is reciprocating and continuous.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the present utility model, the filling pattern is only for distinguishing the layers, and is not limited in any way.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a buffer structure of dry-type transformer, includes dry-type transformer body (1), the bottom fixed mounting of dry-type transformer body (1) both sides has support base (2), and the inboard of support base (2) bottom has been seted up and has been stepped down hole, its characterized in that: an auxiliary sleeve plate (3) is fixedly connected between the bottoms of the two supporting bases (2), a pressure detection part (6) is sleeved on the inner side of the middle part of the auxiliary sleeve plate (3), and the top of the pressure detection part (6) is connected to the surface of the bottom of the dry-type transformer body (1) in a fitting manner;
the two sides of the bottom of the dry-type transformer body (1) are connected with elastic conduction structures (4), the movable end of the bottom structure of each elastic conduction structure (4) is connected with a transduction buffer structure (5), and the transduction buffer structures (5) are arranged on the inner wall of the auxiliary sleeve plate (3);
the top of transduction buffer structure (5) one end is connected with transition top depression bar (7), and the one end laminating of transition top depression bar (7) is connected with piston member (8), the outside joint of piston member (8) one end has transition pipe (9), the one end through connection of transition pipe (9) has T type sleeve pipe (10), and the top of T type sleeve pipe (10) is connected with the surface laminating of dry-type transformer body (1) bottom.
2. The buffer structure of a dry-type transformer according to claim 1, wherein: the inside of pressure detection part (6) is provided with fixed bolster (61), and the inboard of fixed bolster (61) is equipped with I-shaped rod (62), pressure sensor (63), second compression spring (64) respectively, the bottom of pressure sensor (63) and the one end of second compression spring (64) bottom are all installed on the inner wall of supplementary sleeve plate (3), the one end joint at I-shaped rod (62) bottom is at the inboard at fixed bolster (61) top, and the terminal surface of fixed bolster (61) bottom one end respectively with the other end fixed connection of second compression spring (64), with the pressurized face laminating of pressure sensor (63) is connected, the bottom of fixed bolster (61) and the inner wall fixed connection of supplementary sleeve plate (3).
3. The buffer structure of a dry-type transformer according to claim 1, wherein: the elastic conduction structure (4) is composed of a fixed block (41) and a first compression spring (42) fixedly connected with the surface of the bottom of the fixed block (41), the top of the fixed block (41) is fixedly connected with the surface of the bottom of the dry-type transformer body (1), the first compression spring (42) is of an inclined structure, and one end of the first compression spring (42) serves as a movable end of the integral structure of the elastic conduction structure (4).
4. A buffer structure for a dry-type transformer according to claim 3, wherein: the inner side of the transduction buffer structure (5) is provided with a reciprocating sleeve plate (51), the inner side of the reciprocating sleeve plate (51) is clamped with a friction plate (52), the bottom structures at two ends of the friction plate (52) are fixedly connected with the inner wall of the auxiliary sleeve plate (3), and the top of the other end of the reciprocating sleeve plate (51) is fixedly connected with one end of the first compression spring (42).
5. The buffer structure of a dry-type transformer according to claim 4, wherein: the transition top pressure rod (7) is of an L-shaped structure, the other end of the transition top pressure rod (7) is fixedly connected with the top of one end of the reciprocating sleeve plate (51), and one end of the transition top pressure rod (7) is of a hemispherical structure.
6. The buffer structure of a dry-type transformer according to claim 1, wherein: the inside of piston member (8) is provided with T type pole (81), and the end fixedly connected with piston piece (82) of T type pole (81) one end, the surface cover at T type pole (81) middle part has sealing washer (84) for the axle, piston piece (82) and sealing washer (84) for the axle all suit are in the inboard of transition pipe (9) other end, fixed mounting has third compression spring (83) between the terminal surface of T type pole (81) other end and the transition pipe (9) other end, the surface at transition pipe (9) middle part and the inner wall fixed connection of supplementary sleeve plate (3).
7. The buffer structure of a dry-type transformer according to claim 1, wherein: the T-shaped sleeve (10) is provided with a T-shaped abdication space at the inner side, and insulating cooling oil is arranged in the T-shaped abdication space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223144221.5U CN219676998U (en) | 2022-11-25 | 2022-11-25 | Buffer structure of dry-type transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223144221.5U CN219676998U (en) | 2022-11-25 | 2022-11-25 | Buffer structure of dry-type transformer |
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| CN219676998U true CN219676998U (en) | 2023-09-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117612827A (en) * | 2024-01-17 | 2024-02-27 | 一水建设有限公司 | High-stability power transmission transformer |
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2022
- 2022-11-25 CN CN202223144221.5U patent/CN219676998U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117612827A (en) * | 2024-01-17 | 2024-02-27 | 一水建设有限公司 | High-stability power transmission transformer |
| CN117612827B (en) * | 2024-01-17 | 2024-04-05 | 一水建设有限公司 | High-stability power transmission transformer |
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