CN211350365U - High-voltage current transformer of electric locomotive - Google Patents
High-voltage current transformer of electric locomotive Download PDFInfo
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- CN211350365U CN211350365U CN202020116275.2U CN202020116275U CN211350365U CN 211350365 U CN211350365 U CN 211350365U CN 202020116275 U CN202020116275 U CN 202020116275U CN 211350365 U CN211350365 U CN 211350365U
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Abstract
The utility model relates to an electric power system high pressure measuring device, in particular to electric locomotive high tension current transformer. The high-voltage shielding device comprises an insulator, a silicon rubber sleeve, a coil body, a high-voltage shielding net and a base, wherein the coil body and the high-voltage shielding net are sealed in the insulator, and the insulator is arranged on the base; the high-voltage shielding net comprises a left high-voltage shielding net and a right high-voltage shielding net which are arranged on the outer side of the coil body, and an insulating gap is reserved between the left high-voltage shielding net and the right high-voltage shielding net; the silicone rubber sleeve is wrapped on the outer side of the insulator and is integrated with the insulator into a whole through an injection mode. The utility model discloses an epoxy forms with silicon rubber integration injection composite insulation, has advantages such as insulating stable, the leakproofness is good, non-maintaining, long service life, resistant dirty sudden strain of a muscle, small, simple to operate, partial discharge are little, can effectively improve the reliability of application, can extensively be used for various model electric locomotive or new design model locomotive.
Description
Technical Field
The utility model relates to an electric power system high pressure measuring device, in particular to electric locomotive high tension current transformer.
Background
The outdoor current transformer is equipment for measuring current, real-time monitoring or relay protection in an electric locomotive system. At present, the current situation of an outdoor current transformer used on the roof of an electric locomotive is as follows: one is a current transformer adopting oil paper insulation and magnetic bottle insulation; the disadvantages are as follows: due to the fact that an outdoor dynamic operation environment is severe, oil leakage and oil degradation often occur to the current transformer, dirt is easily accumulated in the magnetic bottle, pollution flashover voltage occurs, and maintenance and overhaul work is required frequently; the mounting plate of the outdoor dry current transformer is of a square mounting plate structure, a square mounting hole needs to be opened at the top of the locomotive during use and installation, sealing measures such as water resistance, dust resistance and the like after installation need to be paid particular attention to, and in addition, the product height is higher, so that the insulation protection of a high-voltage element at the top of the locomotive is influenced.
SUMMERY OF THE UTILITY MODEL
To the above problem, an object of the utility model is to provide an electric locomotive high-voltage current transformer to solve the outdoor oil immersed current transformer of current electric locomotive easy oil seepage oil, oily degradation, easy dirty sudden strain of a muscle and current dry-type product highly high, the installation inconvenient, sealed not tight scheduling problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-voltage current transformer of an electric locomotive comprises an insulator, a silicon rubber sleeve, a coil body, a high-voltage shielding net and a base, wherein the coil body and the high-voltage shielding net are sealed in the insulator, and the insulator is arranged on the base; the high-voltage shielding net comprises a left high-voltage shielding net and a right high-voltage shielding net which are arranged on the outer side of the coil body, and an insulating gap is reserved between the left high-voltage shielding net and the right high-voltage shielding net; the silicone rubber sleeve is wrapped on the outer side of the insulator and is integrated with the insulator into a whole through an injection mode.
The coil body comprises an iron core, a primary winding and a secondary winding, wherein the secondary winding is wound on the iron core, the primary winding is of a cylindrical rod-shaped structure penetrating through an inner hole of the secondary winding, and two ends of the primary winding penetrate through the two sides of the insulator to the outer side respectively to form a primary wiring terminal.
And the primary winding is connected with the high-voltage shielding net in an equipotential manner.
The primary wiring terminal is of a flat plate structure which is horizontally arranged.
The insulator comprises a low-voltage insulating support and a high-voltage main insulator arranged at the top of the low-voltage insulating support, the coil body is sealed in the high-voltage main insulator, and the primary wiring terminals are arranged at two ends of the high-voltage main insulator.
The high-voltage main insulator is a horizontal cylinder, and the silicon rubber sleeve coated on the outer side of the high-voltage main insulator is provided with a rubber end umbrella skirt and a rubber auxiliary umbrella skirt which is horizontally arranged along the axial direction.
The low-voltage insulation support is a vertical cylinder, a secondary support used for supporting the secondary winding is sealed in the low-voltage insulation support, and a secondary wiring terminal of the secondary winding is arranged at the bottom of the low-voltage insulation support.
And a secondary wiring box is embedded at the bottom of the low-voltage insulating support, and the secondary wiring terminal is accommodated in the secondary wiring box.
And the silicon rubber sleeve wrapped on the outer side of the low-voltage insulating strut is axially provided with silicon rubber umbrella skirts which are equal in diameter and distributed at intervals.
The base is of a disc-shaped structure made of stainless steel materials, and a plurality of mounting holes are uniformly distributed in the base along the circumferential direction.
The utility model has the advantages of as follows and beneficial effect:
1. the electric field is even, insulating stable, the partial discharge is little: the utility model discloses the product is insulating reliable, and inside and outside electric field is even, and structural design is reasonable, and it is big to guarantee that the product has very big surface insulation creepage distance, has good hydrophobicity, has improved dirty sudden strain of a muscle voltage widely, can prevent the emergence of dirty sudden strain of a muscle trouble effectively, and the inside design of product has the bowl form high voltage shielding net that two sides were put, with the shielding of low voltage electric field in inside, the product volume of putting is little.
2. The production cycle is short, the maintenance cycle is long: the utility model discloses a product adopts epoxy and silicon rubber integration injection composite insulation to form, and production cycle is short, but direct mount in electric locomotive top adopts cylinder isotructure, effectively prevents sleet, water and filth deposit, and the maintenance cycle is long, simplifies and maintains (repaiies) working strength.
3. The resistance is little, mechanical strength is high, and is sealed reliable: the outer silicon rubber umbrellas of the utility model are evenly distributed, have small height, small resistance, can be installed without opening holes with the locomotive, avoid the damage to the shell of the locomotive and poor sealing, have high mechanical strength, and ensure that the product has stable performances such as anti-vibration impact, fatigue strength and the like in the dynamic operation process of the electric locomotive; the flat-plate base is of a disc-shaped stainless steel material structure, a plurality of concentric circle equidistant mounting holes are uniformly distributed on the flat-plate base, and the flat-plate base is uniform in mounting stress and reliable in sealing.
4. High dynamic thermal stability current, low product temperature rise: the utility model discloses a product adopts the handstand formula structure, and the product is once moved the thermal stabilization electric current design height, can effectively avoid system's short circuit and overcurrent to cause the mutual-inductor temperature rise too high and insulation damage.
Drawings
Fig. 1 is a schematic structural view of the high-voltage current transformer of the electric locomotive of the present invention;
fig. 2 is a front view of the high-voltage current transformer of the electric locomotive of the present invention;
FIG. 3 is a side view of FIG. 2;
fig. 4 is a bottom view of fig. 2.
In the figure: 1 is an iron core; 2 is a primary winding; 3 is a secondary winding; 4 is a primary wiring terminal; 5 is a secondary junction box; 6 is a high-voltage main insulator; 7 is a low-voltage insulating strut; 8 is a base; 9 is a silicon rubber sleeve; 10 is a mounting hole; 11 is a secondary bracket; 12 is a silicon rubber umbrella skirt; 13 is a left high-voltage shielding net; 14 is rubber attached umbrella skirt; 15 is an insulation gap; 16 is a rubber end umbrella skirt; 17 is a secondary wiring terminal; and 18 is a right side high voltage shielding net.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model provides an electric locomotive high-voltage current transformer, which comprises an insulator, a silicone rubber sleeve 9, a coil body, a high-voltage shielding net and a base 8, wherein the coil body and the high-voltage shielding net are sealed in the insulator, and the insulator is arranged on the base 8; the high-voltage shielding net comprises a left high-voltage shielding net 13 and a right high-voltage shielding net 18 which are arranged on the outer side of the coil body, and an insulating gap 15 is reserved between the left high-voltage shielding net 13 and the right high-voltage shielding net 18; the silicone rubber sleeve 9 is wrapped on the outer side of the insulator and is integrated with the insulator into a whole through an injection mode.
The coil body comprises an iron core 1, a primary winding 2 and a secondary winding 3, wherein the secondary winding 3 is wound on the iron core 1, the primary winding 2 is of a cylindrical rod-shaped structure penetrating through an inner hole of the secondary winding 3, and two ends of the primary winding 2 penetrate to the outer side from two sides of an insulator respectively to form a primary wiring terminal 4. The primary winding 2 is connected with the left high-voltage shielding net 13 and the right high-voltage shielding net 18 in an equipotential mode.
The embodiment of the utility model provides an in, left side high pressure shielding net 13 and right side high pressure shielding net 18 are the bowl form structure that two sides were put, leave mutual contactless insulating gap 15 between, and insulating gap 15's width is L, shields low pressure electric potential in inside, plays effective shielding effect. The left high-voltage shielding net 13 and the right high-voltage shielding net 18 are respectively connected with the primary wiring terminals 4 at two ends in an equipotential fixed mode, and are equipotential with the primary winding 2 during operation, so that a high-voltage and low-voltage electric field is more uniform, and the insulation level of a product is further improved.
Furthermore, the primary wiring terminal 4 is a flat plate structure arranged horizontally, can be directly connected with a high-voltage related connecting line on the top of the electric locomotive, and is convenient and reliable to install and connect.
In the embodiment of the present invention, as shown in fig. 2-3, the insulator includes a low voltage insulation pillar 7 and a high voltage main insulator 6 disposed on top of the low voltage insulation pillar 7, the coil body is sealed in the high voltage main insulator 6, and the primary connecting terminal 4 is disposed at both ends of the high voltage main insulator 6.
The high-voltage main insulator 6 is a horizontal cylinder, the silicon rubber sleeve 9 coated on the outer side of the high-voltage main insulator 6 is provided with a rubber end umbrella skirt 16 and a rubber attached umbrella skirt 14 horizontally arranged along the axial direction, so that rainwater, conductive dirt and flushing can be effectively guaranteed when a product runs outdoors, the silicon rubber sleeve 9 outside the high-voltage main insulator is integrally injected, the production cycle is short, and the service life is long.
As shown in fig. 1, the low-voltage insulating pillar 7 is a vertical cylinder, and a secondary holder 11 for supporting the secondary winding 3 is enclosed therein, and a secondary connection terminal 17 of the secondary winding 3 is provided at the bottom of the low-voltage insulating pillar 7. The bottom of the low-voltage insulating support 7 is embedded with the secondary junction box 5, the secondary junction terminal 17 is accommodated in the secondary junction box 5, sealing of the secondary junction terminal 17 can be effectively guaranteed, and short circuit and corrosion caused by wetting of rainwater can be avoided, and current measurement is not affected.
As shown in fig. 2-3, the silicone rubber sleeve 9 wrapped outside the low-voltage insulating strut 7 is provided with silicone rubber sheds 12 which have equal diameters and are arranged at intervals along the axial direction, so that the product has a larger surface creepage distance, and the insulation level of the product under the outdoor operation condition is enhanced.
As shown in fig. 4, the base 8 is a disk-shaped structure made of stainless steel, and a plurality of mounting holes 10 are uniformly distributed in the circumferential direction.
The embodiment of the utility model provides an in, evenly distributed has six equidistant mounting holes 10 on the base 8, and the center of six mounting holes 10 is located same circumference, and the installation atress is evenly sealed more reliable.
The utility model discloses a manufacture process is:
the secondary winding 3 is uniformly wound on the annular iron core 1 and secondarily wrapped with an insulating material, the primary winding 2 is single-turn, the middle of the primary winding is a cylindrical rod, two ends of the primary winding are in a flat plate structure form, and the primary winding 2 is insulated, buffered and wrapped and penetrates through an inner hole of the secondary winding 3 after being welded and processed to form a coil body with a primary wiring terminal 4, the primary winding 2 and the secondary winding 3; a secondary winding 3 is fixed on a mould by a specially-made secondary support 10, a primary winding 2 is fixed on the mould by a primary wiring terminal 4, in order to ensure that an internal electric field and an external electric field are more uniform, a high-voltage shielding net which is processed in advance is fixed on the primary winding 2, then a secondary wiring terminal 17 is connected, after the distance is adjusted, epoxy resin is used for vacuum pouring and curing and silicone rubber integrated injection composite insulation, and then an integrated structure consisting of the primary wiring terminal 4, a high-voltage main insulator 6, a low-voltage insulating support 7 and a secondary wiring box 5 is formed, and finally the integrated structure is integrally installed on a flat plate type base 8.
In the embodiment of the utility model, the high-voltage main insulator 6 for encapsulating the primary and secondary windings is positioned right above the low-voltage insulating support 7, and the high-voltage main insulator 6 is a cylindrical structure with a round angle at the periphery in a transverse arrangement, which is beneficial to effectively ensuring that rainwater and conductive dirt are flushed away in time when the product runs outdoors; the low-voltage insulating strut 7 for encapsulating the secondary winding lead and the secondary support 11 is a vertically vertical cylindrical structure, and silicone rubber umbrella skirts 12 with equal outer diameter sizes are distributed outside the low-voltage insulating strut at equal intervals, so that the product has larger surface creepage distance, and the insulating level of the product under the outdoor operation condition is enhanced; the outgoing line of the secondary coil is fixed by a secondary support 11 made of white steel, the secondary junction box 5 is positioned at the bottom of the low-voltage insulating support 7, and the whole body is recessed inside, so that the sealing of the secondary wiring terminal 17 can be effectively ensured, and the current measurement cannot be influenced by short circuit and corrosion caused by wetting of rainwater; the periphery of the outer part of the axis of the high-voltage main insulator 6 for encapsulating the primary winding and the secondary winding is provided with a rubber attached umbrella skirt 14, so that the insulation level is increased, and pollution flashover voltage is prevented; the flat-plate-shaped base 8 is of a disc-shaped stainless steel material structure, six concentric circle mounting holes 10 are uniformly distributed on the flat-plate-shaped base, the concentric circles are equidistant, and the flat-plate-shaped base is uniform in mounting stress and reliable in sealing.
The utility model provides an electric locomotive high-voltage current transformer is used for the open air, is a new product according to national standard and railway standard design completely, adopts the ring type to roll up system iron core, utilizes the electromagnetic conversion principle, makes secondary current can accurately reflect the situation of change of measuring primary current, transmits for secondary control or protection device, makes product direct mount in electric locomotive roof, uses as current measurement and relay protection.
The utility model discloses an epoxy and silicon rubber integration injection composite insulation form, have insulating stable, the leakproofness good, non-maintaining, long service life, resistant dirty sudden strain of a muscle, small, simple to operate, advantage such as the volume is little are put in office, can effectively improve the reliability of application, can extensively be used for various model electric locomotive or new design model locomotive, realized electric locomotive electrical system electrical programming, standardization, oiliness, localization.
The above description is only for the 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 all included in the protection scope of the present invention.
Claims (10)
1. A high-voltage current transformer of an electric locomotive is characterized by comprising an insulator, a silicon rubber sleeve, a coil body, a high-voltage shielding net and a base, wherein the coil body and the high-voltage shielding net are sealed in the insulator, and the insulator is arranged on the base; the high-voltage shielding net comprises a left high-voltage shielding net and a right high-voltage shielding net which are arranged on the outer side of the coil body, and an insulating gap is reserved between the left high-voltage shielding net and the right high-voltage shielding net; the silicone rubber sleeve is wrapped on the outer side of the insulator.
2. The electric locomotive high voltage current transformer according to claim 1, wherein the body comprises an iron core, a primary winding and a secondary winding, wherein the secondary winding is wound around the iron core, the primary winding is a cylindrical rod-shaped structure passing through an inner hole of the secondary winding, and two ends of the primary winding respectively penetrate from two sides of the insulator to the outside to form a primary connection terminal.
3. The electric locomotive high voltage current transformer according to claim 2, wherein said primary winding is equipotentially connected to said high voltage screen.
4. The electric locomotive high voltage current transformer of claim 2, wherein said primary terminal is a horizontally disposed flat plate structure.
5. The electric locomotive high voltage current transformer according to claim 2, wherein the insulator comprises a low voltage insulating pillar and a high voltage main insulator disposed on top of the low voltage insulating pillar, the body of the coil is enclosed in the high voltage main insulator, and the primary terminals are disposed at both ends of the high voltage main insulator.
6. The high-voltage current transformer for electric locomotives according to claim 5, wherein the high-voltage main insulator is a horizontal cylinder, and the silicone rubber sleeve coated outside the high-voltage main insulator is provided with a rubber end shed and a rubber auxiliary shed horizontally arranged along the axial direction.
7. The electric locomotive high voltage current transformer according to claim 5, wherein the low voltage insulating pillar is a vertical cylinder and has a secondary support enclosed therein for supporting the secondary winding, the secondary terminal of the secondary winding being disposed at a bottom of the low voltage insulating pillar.
8. The electric locomotive high voltage current transformer of claim 7, wherein a secondary junction box is embedded in the bottom of the low voltage insulating pillar, and the secondary junction box is accommodated in the secondary junction box.
9. The high-voltage current transformer for electric locomotives according to claim 7, wherein the silicone rubber sleeve wrapped outside the low-voltage insulation post is provided with silicone rubber sheds with equal diameter and arranged at intervals along the axial direction.
10. The electric locomotive high voltage current transformer of claim 1, wherein said base is a disk-shaped structure made of stainless steel material, and a plurality of mounting holes are uniformly distributed along a circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020116275.2U CN211350365U (en) | 2020-01-19 | 2020-01-19 | High-voltage current transformer of electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020116275.2U CN211350365U (en) | 2020-01-19 | 2020-01-19 | High-voltage current transformer of electric locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350365U true CN211350365U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020116275.2U Active CN211350365U (en) | 2020-01-19 | 2020-01-19 | High-voltage current transformer of electric locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350365U (en) |
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2020
- 2020-01-19 CN CN202020116275.2U patent/CN211350365U/en active Active
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