CN214588422U - Combined mutual inductor - Google Patents
Combined mutual inductor Download PDFInfo
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- CN214588422U CN214588422U CN202121163763.XU CN202121163763U CN214588422U CN 214588422 U CN214588422 U CN 214588422U CN 202121163763 U CN202121163763 U CN 202121163763U CN 214588422 U CN214588422 U CN 214588422U
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- epoxy resin
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Abstract
The utility model relates to a combined mutual inductor, which comprises an epoxy resin pouring body, a voltage coil component, a current coil component and a supporting component, wherein the voltage coil component comprises a voltage iron core and two voltage coils which are respectively arranged on the voltage iron core, the current coil component comprises two current iron cores and two current coils which are respectively arranged on the current iron cores, the supporting component comprises a supporting plate and two supporting copper bars, two ends of the supporting plate are respectively connected on the two current coils, one end of each of the two supporting copper bars is welded on the copper foil of each of the two voltage coils, the other end of each of the two supporting copper bars is provided with a fixed insert, the fixed inserts are respectively connected with the bolts on the bottom plate of the mold, the voltage coil assembly, the current coil assembly and the supporting assembly are integrally cast by epoxy resin to form the epoxy resin cast body. The utility model has the advantages of simple structure, stable and reliable performance, good insulating property and low partial discharge.
Description
Technical Field
The utility model relates to a mutual-inductor technical field, concretely relates to combined mutual-inductor.
Background
At present, a cast combined transformer is used for electric energy metering on a power grid transmission line and plays a role in current and voltage measurement and monitoring. The supporting component structural design in the existing pouring type combined mutual inductor is unreasonable, the voltage coil and the current coil are not convenient to hoist, the distance between the voltage coil and the current coil is too small, when epoxy resin is adopted for pouring, the thickness of an epoxy resin layer poured by the combined mutual inductor is uneven, the epoxy resin layer is easy to crack, and the combined mutual inductor in the combined mutual inductor has the defects of poor insulating property, unstable performance and high partial discharge.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance is reliable, insulating properties is good, the combination transformer that low office put.
In order to achieve the above object, the present invention adopts a combined transformer, which comprises an epoxy resin casting body, a voltage coil assembly, a current coil assembly, and a supporting assembly disposed between the voltage coil assembly and the current coil assembly, wherein the voltage coil assembly comprises a voltage iron core and two voltage coils disposed on the voltage iron core, the current coil assembly comprises two current iron cores and two current coils disposed on the current iron cores, respectively, the supporting assembly comprises a supporting plate disposed on the voltage iron core and two supporting copper bars, two ends of the supporting plate are connected to the two current coils, respectively, and one ends of the two supporting copper bars are welded to the copper foils of the two voltage coils, respectively, the other ends of the two supporting copper bars are provided with a fixing insert, respectively, the fixing inserts are connected to the bolts on the die base plate, the voltage coil assembly, the current coil assembly and the supporting assembly are integrally cast by epoxy resin to form the epoxy resin cast body.
The beneficial effect of above-mentioned structure is: the backup pad can be fixed with two current coil's pouring position, two voltage coil are fixed on the mould bottom plate through supporting the bar copper respectively, thereby can guarantee the insulating interval between current coil and the voltage coil, and when pouring epoxy, the epoxy pouring material can enter into current coil completely, inside the voltage coil, thereby guaranteed that the thickness of the epoxy layer of pouring is even, the fracture that the epoxy layer thickness is uneven caused has been avoided, thereby the yield of this combined transformer's manufacturing has been improved, the dielectric strength of the epoxy pouring body has also been improved, thereby this combined transformer's local discharge capacity can reach national standard, make the life of whole combined transformer prolong greatly. And the two copper bars are connected with the bolts of the die bottom plate through the fixed inserts, so that the voltage coil assembly is convenient to hoist, the production efficiency of the combined transformer is improved, and the combined transformer has the advantages of simple structure, stable and reliable performance and good insulating performance.
Particularly, two ends of the supporting plate are respectively provided with two arc supporting pieces matched with the two current coils, the two arc supporting pieces are attached to the peripheral walls of the two current coils, and the two arc supporting pieces and the two current coils are respectively provided with a binding belt. The arc-shaped supporting sheet connected with the current coil is arranged on the supporting plate, and the current coil is tightly bound on the current coil through the binding belt, so that the supporting plate and the current coil can be connected more compactly.
Particularly, the epoxy resin casting body is wrapped with a silica gel insulating layer, and the umbrella skirt is arranged on the silica gel insulating layer corresponding to the binding post. The silica gel insulating layer can play insulating effect, is favorable to improving this combination mutual-inductor's insulating properties, and the full skirt on the silica gel insulating layer can increase creepage distance, is favorable to improving this combination mutual-inductor's security performance.
Drawings
Fig. 1 is a front view structure diagram of the embodiment of the present invention.
Fig. 2 is a side view structure diagram of the embodiment of the present invention.
Detailed Description
As shown in fig. 1 and 2, an embodiment of the present invention is a combined transformer, including an epoxy resin casting 10, a voltage coil assembly 20, a current coil assembly 30, and a supporting assembly 40 disposed between the voltage coil assembly 20 and the current coil assembly 30, wherein the voltage coil assembly 20 includes a voltage core 21, two voltage coils 22 disposed on the voltage core 21, respectively, the current coil assembly 30 includes two current cores 31, two current coils 32 disposed on the current cores 31, respectively, the supporting assembly 40 includes a supporting plate 41 disposed on the voltage core 21, two supporting copper bars 42, two ends of the supporting plate 41 are connected to the two current coils 32, respectively, and one end of each of the two supporting copper bars 42 is welded to the copper foils of the two voltage coils 22, the other end of each of the two supporting copper bars 42 is provided with a fixing insert 421, the fixing inserts 421 are respectively connected to the bolts 51 on the mold base plate 50, and the voltage coil assembly 20, the current coil assembly 30, and the support assembly 40 are integrally molded by epoxy resin to form the epoxy resin molded body 10. The two ends of the supporting plate 41 are respectively provided with two arc supporting pieces 411 matched with the two current coils 32, the two arc supporting pieces 411 are attached to the peripheral walls of the two current coils 32, and the two arc supporting pieces 411 and the two current coils 32 are respectively provided with a binding belt 43. The arc-shaped supporting sheet connected with the current coil is arranged on the supporting plate, and the current coil is tightly bound on the current coil through the binding belt, so that the supporting plate and the current coil can be connected more compactly. The epoxy resin casting body 10 is wrapped with a silica gel insulating layer 11, and an umbrella skirt 111 is arranged on the silica gel insulating layer 11 and corresponds to the binding post. The silica gel insulating layer can play insulating effect, is favorable to improving this combination mutual-inductor's insulating properties, and the full skirt on the silica gel insulating layer can increase creepage distance, is favorable to improving this combination mutual-inductor's security performance.
The backup pad can be fixed with two current coil's pouring position, two voltage coil are fixed on the mould bottom plate through supporting the bar copper respectively, thereby can guarantee the insulating interval between current coil and the voltage coil, and when pouring epoxy, the epoxy pouring material can enter into current coil completely, inside the voltage coil, thereby guaranteed that the thickness of the epoxy layer of pouring is even, the fracture that the epoxy layer thickness is uneven caused has been avoided, thereby the yield of this combined transformer's manufacturing has been improved, the dielectric strength of the epoxy pouring body has also been improved, thereby this combined transformer's local discharge capacity can reach national standard, make the life of whole combined transformer prolong greatly. And the two copper bars are connected with the bolts of the die bottom plate through the fixed inserts, so that the voltage coil assembly is convenient to hoist, the production efficiency of the combined transformer is improved, and the combined transformer has the advantages of simple structure, stable and reliable performance and good insulating performance.
Claims (3)
1. The utility model provides a combined transformer, includes epoxy resin pouring body, voltage coil subassembly, current coil subassembly, sets up the supporting component between voltage coil subassembly and current coil subassembly, the voltage coil subassembly include voltage core, set up two voltage coil on voltage core respectively, the current coil subassembly include two current core, set up two current coil on each current core respectively, its characterized in that: the supporting component comprises a supporting plate and two supporting copper bars, the supporting plate is arranged on the voltage iron core, the two ends of the supporting plate are respectively connected onto the two current coils, one ends of the two supporting copper bars are respectively welded on copper foils of the two voltage coils, the other ends of the two supporting copper bars are respectively provided with a fixed insert, the fixed inserts are respectively connected with bolts on the die bottom plate, and the voltage coil component, the current coil component and the supporting component are integrally cast through epoxy resin and form the epoxy resin casting body.
2. The combination transformer of claim 1, wherein: the two ends of the supporting plate are respectively provided with two arc supporting pieces matched with the two current coils, the two arc supporting pieces are attached to the peripheral walls of the two current coils, and the two arc supporting pieces and the two current coils are respectively provided with a binding belt.
3. The combined transformer according to claim 1 or 2, characterized in that: the epoxy resin casting body is wrapped with a silica gel insulating layer, and the silica gel insulating layer is provided with an umbrella skirt corresponding to the binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121163763.XU CN214588422U (en) | 2021-05-27 | 2021-05-27 | Combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121163763.XU CN214588422U (en) | 2021-05-27 | 2021-05-27 | Combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214588422U true CN214588422U (en) | 2021-11-02 |
Family
ID=78329857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121163763.XU Active CN214588422U (en) | 2021-05-27 | 2021-05-27 | Combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214588422U (en) |
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2021
- 2021-05-27 CN CN202121163763.XU patent/CN214588422U/en active Active
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