CN215643966U - High-voltage transformer for motor train unit - Google Patents
High-voltage transformer for motor train unit Download PDFInfo
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- CN215643966U CN215643966U CN202121332289.9U CN202121332289U CN215643966U CN 215643966 U CN215643966 U CN 215643966U CN 202121332289 U CN202121332289 U CN 202121332289U CN 215643966 U CN215643966 U CN 215643966U
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- motor train
- train unit
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- voltage transformer
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Abstract
The utility model relates to high-voltage measurement or relay protection equipment of a contact network control system of a motor train unit, in particular to a high-voltage transformer for the motor train unit. The transformer comprises a main insulator and a transformer body sealed in the main insulator, wherein a plurality of cavities are formed in the side wall of the main insulator along the circumferential direction, a primary insulating column is arranged at the top of the main insulator, and a primary high-voltage wiring terminal is arranged at the top of the primary insulating column; one side of the bottom of the main insulator is provided with a secondary wiring terminal, a primary N end and a grounding end, and the secondary wiring terminal, the primary N end and the grounding end are accommodated in a secondary wiring box; the outer side of the main insulator is coated with a silicon rubber sleeve. The motor train unit has the advantages of reasonable structure, convenience in installation, large creepage distance, stability in insulation, moisture and condensation prevention and stable performance, and improves the safety and reliability of the operation of the motor train unit.
Description
Technical Field
The utility model relates to high-voltage measurement or relay protection equipment of a contact network control system of a motor train unit, in particular to a high-voltage transformer for the motor train unit.
Background
The voltage transformer is equipment for measuring voltage, monitoring in real time or protecting relay in a power supply control system of the motor train unit, and high-voltage components such as the voltage transformer, a main circuit breaker, an isolating switch, a lightning arrester and the like are jointly installed at the position of the top of a train and directly contacted with the atmospheric environment according to design requirements. At present, a voltage transformer commonly adopted by a standard motor train unit is used, the insulation form of a product is a single epoxy resin vacuum pouring mode, and according to the statistics of application effects, surface flashover discharge and insulation breakdown faults occur for many times in the application process of the product, so that the phenomena of motor train shutdown and passenger delay are caused; the main reason is caused by the inadaptability of the outdoor operation environment of the single epoxy resin. Therefore, a stable and reliable high-voltage transformer suitable for the motor train unit is urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the utility model aims to provide a stable and reliable high-voltage transformer for a motor train unit, so as to solve the problems that the existing motor train unit voltage transformer is easy to have surface flashover, discharge and insulation breakdown faults.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a high-voltage transformer for a motor train unit comprises a main insulator and a transformer body sealed in the main insulator, wherein a plurality of cavities are formed in the side wall of the main insulator along the circumferential direction, a primary insulating column is arranged at the top of the main insulator, and a primary high-voltage wiring terminal is arranged at the top of the primary insulating column; a secondary wiring terminal, a primary N end and a grounding end are arranged on one side of the bottom of the main insulator, and are contained in a secondary wiring box; and a silicone rubber sleeve is coated on the outer side of the main insulator.
The main insulator is cylindrical, and the top of the main insulator is spherical convex; the primary insulating column is cylindrical and penetrates through the spherical bulge of the main insulator.
A rubber umbrella skirt a and a rubber umbrella skirt b are arranged on the outer side of the silicon rubber sleeve, and the rubber umbrella skirt a is positioned on the outer side of the primary insulating column; the rubber shed b is positioned outside the main insulator.
The cross section of the cavity is of a fan-shaped structure.
The number of the cavities is four, and the cavities are arranged in a centrosymmetric mode.
A wiring connector is arranged in the secondary wiring box and is connected with the primary N end, the grounding end and the secondary wiring terminal; and one side of the secondary junction box is provided with a waterproof joint.
The bottom of the secondary junction box is provided with a slide way, and the wiring connector is connected with the slide way in a sliding manner.
The secondary junction box is of a square box structure made of silicon rubber, and the top of the secondary junction box is sealed through a rubber cushion and a cover plate.
The secondary junction box and the silicon rubber sleeve are of an integrated structure.
The main insulator is cast with the transformer body into an integral structure by adopting epoxy resin; the main insulator and the secondary junction box are arranged on the base.
The utility model has the following advantages and beneficial effects:
1. rational in infrastructure, simple to operate: the product of the utility model optimizes the structural design, the inner casting body adopts the shape of a cylinder and a cone, which not only ensures that the inner part has a uniform and reliable insulating layer and the electric field is uniform, but also has reliable mechanical strength, the structure of a square base and the like further improves the vibration and impact resistance of the product, the fatigue resistance is high, and the product is convenient to be installed in any direction.
2. Creepage distance is big, insulating stable: the integrated integral rubber sleeve is designed to ensure that the product cannot cause external discharge or flashover due to external insulation deterioration, the rubber umbrella skirts with the size interval are distributed on the rubber sleeve from top to bottom, the surface creepage distance of the product is effectively increased, the capability of resisting rain, snow, wind and sand of the product under outdoor conditions is improved, the internal and external insulation of the product is more reliable, the insulation is stable, and the service life of the product is longer.
3. Moisture-proof and condensation-proof, and stable performance: the secondary wiring terminal is positioned in the vehicle body, the silicone rubber outer casting body with the optimized structural design is positioned at the top of the vehicle body, and the product has the advantages of ultraviolet resistance, severe environment examination, higher protection level and reliable moisture-proof and condensation-proof performance; and the electric design of the inner coil is optimally designed by combining the actual condition of the contact net of the motor train unit, the product is suitable for all railway contact net lines, and the product performance is very stable.
Drawings
FIG. 1 is a schematic structural diagram of a high-voltage transformer for a motor train unit according to the utility model;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a schematic view of the structure of the main insulator of the present invention;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a top view of FIG. 4;
fig. 7 is a schematic view of the layout of the wiring connector of the present invention.
In the figure: 1 is the iron core, 2 is the secondary winding, 3 is the primary winding, 4 is the silicon rubber cover, 5 is the insulating cylinder once, 6 is a high voltage connection terminal, 7 is rubber shed a, 8 is the cavity, 9 is epoxy, 10 is the apron, 11 is the cushion, 12 is the wiring connector, 12a is for taking the fuse connector, 12b is for not taking the fuse connector, 13 is waterproof joint, 14 is the slide, 15 is the base, 16 is a N end and earthing terminal, 17 is secondary connection terminal, 18 is rubber shed b, 19 is the secondary terminal box, 20 is main insulator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the high-voltage transformer for the motor train unit provided by the utility model comprises a main insulator 20 and a transformer body sealed in the main insulator 20, wherein a plurality of cavities 8 are formed in the side wall of the main insulator 20 along the circumferential direction, a primary insulating column 5 is arranged at the top of the main insulator 20, and a primary high-voltage wiring terminal 6 is arranged at the top of the primary insulating column 5 to realize electrical direct connection; the secondary wiring terminal 17 and the primary N terminal and ground terminal 16 are disposed on one side of the bottom of the main insulator 20, the secondary wiring terminal 17 and the primary N terminal and ground terminal 16 are accommodated in the secondary wiring box 19, and the primary N terminal and ground terminal 16 and the secondary wiring terminal 17 are disposed side by side, so that a user can conveniently ground. The outer side of the main insulator 20 is coated with a silicone rubber sleeve 4, and the silicone rubber sleeve 4 has the performances of ultraviolet resistance, aging resistance and anti-condensation.
As shown in fig. 4-6, in the embodiment of the present invention, the main insulator 20 is cylindrical, and the top thereof is spherical, so as to ensure reliable insulation and sealing, prevent the electrical leakage and discharge problem caused by condensation on the surface of the product, and allow rainwater to flow away smoothly in the outdoor operation environment. The primary insulating column 5 is cylindrical, and the bottom of the primary insulating column penetrates through the spherical protrusion of the main insulator 20, so that the electrical connection is realized through reliable resin insulation and fixation.
As shown in fig. 4 and 6, in the embodiment of the present invention, the cross section of the cavity 8 is a sector structure. The number of the cavities 8 is four, and the cavities are arranged in central symmetry. The ends of the cavities 8 of the four fan-shaped structures are sealed by epoxy resin 9, so that the uniformity of resin insulation layers is ensured.
In this embodiment, the silicone rubber sleeve 4 is sleeved outside the cylindrical main insulator 20, and the cylindrical main insulator is designed to have an optimized profiling structure, so that the periphery of the internal high-voltage coil is ensured to have a sufficient and uniform insulation distance, and rainwater can smoothly flow away in an outdoor operation environment.
Further, as shown in fig. 1-2, a rubber shed a7 and a rubber shed b18 are arranged on the outer side of the silicone rubber sleeve 4, and the rubber sheds a7 are arranged on the outer side of the primary insulating column 5 in parallel and at equal intervals; the rubber sheds b18 are arranged on the outer side of the main insulator 20 at equal intervals in parallel, so that the surface creepage distance of the product is effectively increased.
As shown in fig. 1, in the embodiment of the present invention, a wiring connector 12 is disposed in the secondary terminal box 19, and the wiring connector 12 is connected to the primary N terminal, the ground terminal 16 and the secondary wiring terminal 17, so as to protect the product in case of a fault. One side of the secondary junction box 19 is provided with a waterproof joint 13, so that the sealing is reliable when a user connects wires.
Further, the bottom of the secondary junction box 19 is provided with a slide way 14, and the wiring connector 12 is slidably connected with the slide way 14. The secondary junction box 19 is of a square box structure made of silicon rubber, the top of the secondary junction box is sealed through a rubber mat 11 and a cover plate 10, and the secondary junction box is fastened, sealed and waterproof. One end of the secondary junction box 19 is provided with two wire outlet holes for installing two waterproof joints 13. The secondary junction box 19 is made of silicon rubber material and has the performances of ultraviolet resistance, aging resistance and anti-condensation. In this embodiment, the secondary junction box 19 and the silicone rubber sleeve 4 are of an integrated structure.
As shown in fig. 7, in the embodiment of the present invention, the terminal connector 12 includes a fused connector 12a and a non-fused connector 12b, and the terminals 1a and 2a of the secondary terminals 17 are respectively connected to one fused connector 12a, so that the voltage transformer can be protected when the system fails; the connection terminal 1N, the connection terminal 2N, the primary N terminal and the ground terminal 16 of the secondary connection terminal 17 are respectively connected to a connector 12b without a fuse, and the connector 12a with a fuse and the connector 12b without a fuse are arranged in parallel on the slide 14, so that the combination is convenient.
In the embodiment of the utility model, the transformer body comprises an iron core 1, a primary winding 3 and a secondary winding 2, wherein the secondary winding 2 and the primary winding 3 are concentrically wound on an insulating framework from inside to outside and then are sleeved on the iron core 1, an outgoing line of the primary winding 3 is connected with a primary high-voltage wiring terminal 6, and an outgoing line of the secondary winding 2 is connected with a secondary wiring terminal 17. The main insulator 20 is cast with the transformer body by epoxy resin to form an integral structure; the main insulator 20 and the secondary junction box 19 are arranged on the square base 15, and the slide rail 14 is fastened on the base 15, so that the permanent seal is reliable under the condition of long service life, and the problem of falling is avoided.
The utility model provides a manufacturing process of a high-voltage transformer for a motor train unit, which comprises the following steps:
the secondary winding 2 and the primary winding 3 are concentrically wound on an insulating framework and then sleeved on a core column of the iron core 1, the core column is fixed in a casting mold after insulation and buffering wrapping, an epoxy resin vacuum casting and curing integrated structure is adopted, the main insulator 20 is formed, and finally the base 15 is integrally installed on a square structure, an integrated silicone rubber sleeve 4 is wrapped outside the main insulator 20 and forms external insulation of a mutual inductor, the high-quality material has ultraviolet-proof, ageing-resistant and condensation-resistant performances, a rubber umbrella skirt a7 and a rubber umbrella skirt b18 which are equally spaced and parallel and alternate are arranged on the outer side of the silicone rubber sleeve 4, the surface creepage distance of the product is effectively increased, the fog and flash resistance of the product under outdoor conditions is improved, and the insulation is more reliable.
The high-voltage transformer for the motor train unit is a new product designed completely according to national standards and railway standards, adopts a coiled iron core, and utilizes an electromagnetic conversion principle to ensure that secondary voltage can accurately reflect the change condition of primary network voltage measurement and reliably and accurately transmit a network voltage signal to a motor train unit control system. The main insulator 20 is an integrated structure formed by vacuum casting and curing of epoxy resin, and the outer side of the main insulator is coated with the integrated silicone rubber sleeve, so that the motor train unit has the characteristics of reasonable structure, convenience in installation, large creepage distance, stability in insulation, moisture resistance, condensation prevention, stable performance and the like, further improves the reliability of safe operation of the motor train unit, and can be used for various types of standard motor train units.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. The high-voltage transformer for the motor train unit is characterized by comprising a main insulator (20) and a transformer body sealed in the main insulator (20), wherein a plurality of cavities (8) are formed in the side wall of the main insulator (20) along the circumferential direction, a primary insulating column (5) is arranged at the top of the main insulator (20), and a primary high-voltage wiring terminal (6) is arranged at the top of the primary insulating column (5); a secondary wiring terminal (17), a primary N end and a grounding end (16) are arranged on one side of the bottom of the main insulator (20), and the secondary wiring terminal (17), the primary N end and the grounding end (16) are accommodated in the secondary wiring box (19); the outer side of the main insulator (20) is coated with a silicone rubber sleeve (4).
2. The high-voltage potential transformer for the motor train unit according to claim 1, wherein the main insulator (20) is cylindrical and has a spherical convex top; the primary insulating column (5) is cylindrical and penetrates through the spherical bulge of the main insulator (20).
3. The high-voltage transformer for the motor train unit according to claim 1, wherein a rubber shed a (7) and a rubber shed b (18) are arranged on the outer side of the silicone rubber sleeve (4), and the rubber shed a (7) is positioned on the outer side of the primary insulating column (5); the rubber shed b (18) is located outside the main insulator (20).
4. The high-voltage potential transformer for the motor train unit according to claim 1, wherein the cross section of the cavity (8) is of a sector structure.
5. The high-voltage transformer for the motor train unit according to claim 4, wherein the number of the cavities (8) is four, and the cavities are arranged in a central symmetry manner.
6. The high-voltage transformer for the motor train unit according to claim 1, wherein a wiring connector (12) is arranged in the secondary wiring box (19), and the wiring connector (12) is connected with the primary N terminal, the grounding terminal (16) and the secondary wiring terminal (17); one side of the secondary junction box (19) is provided with a waterproof joint (13).
7. The high-voltage transformer for the motor train unit according to claim 6, wherein a slide way (14) is arranged at the bottom of the secondary junction box (19), and the wiring connector (12) is slidably connected with the slide way (14).
8. The high-voltage transformer for the motor train unit according to claim 7, wherein the secondary junction box (19) is of a square box structure made of silicon rubber, and the top of the secondary junction box is sealed by a rubber gasket (11) and a cover plate (10).
9. The high-voltage transformer for the motor train unit according to claim 8, wherein the secondary junction box (19) and the silicone rubber sleeve (4) are of an integral structure.
10. The high-voltage transformer for the motor train unit according to claim 1, wherein the main insulator (20) is cast with the transformer body by epoxy resin to form an integral structure; the main insulator (20) and the secondary junction box (19) are disposed on a base (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121332289.9U CN215643966U (en) | 2021-06-16 | 2021-06-16 | High-voltage transformer for motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121332289.9U CN215643966U (en) | 2021-06-16 | 2021-06-16 | High-voltage transformer for motor train unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215643966U true CN215643966U (en) | 2022-01-25 |
Family
ID=79943268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121332289.9U Active CN215643966U (en) | 2021-06-16 | 2021-06-16 | High-voltage transformer for motor train unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215643966U (en) |
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2021
- 2021-06-16 CN CN202121332289.9U patent/CN215643966U/en active Active
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