CN211088061U - Pull belt shielding ring structure - Google Patents
Pull belt shielding ring structure Download PDFInfo
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- CN211088061U CN211088061U CN201921899169.XU CN201921899169U CN211088061U CN 211088061 U CN211088061 U CN 211088061U CN 201921899169 U CN201921899169 U CN 201921899169U CN 211088061 U CN211088061 U CN 211088061U
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- copper bar
- shielding
- ring structure
- stretching strap
- drawstring
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Abstract
The utility model relates to a stretching strap shield ring constructs, include: the copper bar ring is a rectangular non-closed loop formed by bending an inner layer copper bar and an outer layer copper bar, the insulating paper is uniformly bound at the outer side after the inner layer copper bar and the outer layer copper bar are separated by the insulating paper board, and the copper bar ring is led out of the grounding wire by a red copper strip. The utility model also relates to a method for installing the drawstring shielding ring structure, wherein a forming insulating piece passes through the drawstring shielding ring structure, and an insulating screw rod is fixed on the lower plane of the web plate of the iron core clamping piece; and the grounding wire of the drawstring shielding ring structure is fixed on the web of the iron core clamping piece to ensure reliable grounding. The utility model discloses in on the basis of the shielding cap structure that sets up stretching strap fastening bolt, increased the shielding of stretching strap lower part, make stretching strap tip, ware side region electric field distribution more even reasonable, insulating properties is more reliable.
Description
Technical Field
The utility model belongs to the technical field of the transformer manufacture, concretely relates to fastening member stretching strap shield ring structure of transformer core is insulation system's partly in the transformer core assembly, and specially adapted extra-high voltage transformer etc. requires high product to electrical insulation.
Background
With the rapid development of the electric power industry in China, the ultra-high voltage transmission has a wide development prospect in the electric power system in China due to the advantages of low loss, high efficiency and the like. The insulation reliability of the extra-high voltage alternating current transformer is the technical problem which is mainly solved by design.
The assembly of the transformer iron core is an important part in the transformer body, and generally comprises an upper beam, a pad foot, a side beam, a drawstring, an insulating part, a shielding cap and other parts, so that the iron core forms a complete and firm integral frame structure. The drawstring is used as a fastening member of the transformer core, and requires reliability of mechanical and electrical strength. The drawstring is located in a high field intensity region of the transformer, and the electrical insulation performance of the drawstring on charged bodies such as surrounding transformer windings, lead wires and the like must be ensured to be absolutely reliable, so the insulation protection and the shielding of the drawstring are particularly important.
In the conventional design, only the shielding cap structure of the fastening bolt of the pull belt is arranged, so that the electric field at the end part is more uniform. However, the structure has good shielding effect on the oil tank and the tapping lead outside the shielding cap in the horizontal direction, and has not ideal shielding effect on the transformer winding body and the coil outgoing line of the lower part of the pull belt. There is therefore room for improvement.
Disclosure of Invention
In order to solve the technical problem, the utility model discloses on the basis of the shielding cap structure that sets up stretching strap fastening bolt, a neotype stretching strap shielding ring structure is provided. The utility model discloses the technical scheme who adopts as follows:
a pull strap shield ring structure comprising: the copper bar ring is a rectangular non-closed loop formed by bending an inner layer copper bar and an outer layer copper bar, the insulating paper is uniformly bound at the outer side after the inner layer copper bar and the outer layer copper bar are separated by the insulating paper board, and the copper bar ring is led out of the grounding wire by a red copper strip.
The utility model has the advantages that:
the utility model discloses in on the basis of the shielding cap structure that sets up stretching strap fastening bolt, increased the shielding of stretching strap lower part, make stretching strap tip, ware side region electric field distribution more even reasonable, insulating properties is more reliable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.
Fig. 1 is a front view of a strap shield ring structure of an embodiment of the present invention;
fig. 2 is a top view of a strap shield ring structure according to an embodiment of the present invention;
fig. 3 is an installation schematic diagram of a strap shield ring structure according to an embodiment of the present invention;
fig. 4 is an electric field analysis cloud chart after the structure of the shielding ring of the pull belt of the embodiment of the present invention is installed;
in the figure, 1-copper rod ring, 2-insulating paper, 3-insulating paper board, 4-grounding wire, 5-transformer iron core, 6-iron core clamping piece web, 7-pulling belt, 8-pulling belt shielding ring structure, 9-forming insulator and 10-insulating screw rod.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, it is a front view of the drawstring shield ring structure according to the embodiment of the present invention; as shown in fig. 2, it is a top view of the drawstring shield ring structure according to the embodiment of the present invention. A pull strap shield ring structure comprising: copper bar ring 1, insulating paper 2, insulating paper board 3, earth connection 4, copper bar ring 1 for the inside and outside rectangle not closed loop that double-deck copper bar was buckled into, with insulating paper board 3 interval back, unified wrapping insulating paper 2 in the outside between inside and outside two-layer copper bar, draw forth earth connection 4 with copper bar ring 1 with the copper strips.
The shielding copper rod ring with insulation can play a role in uniform electric field distribution because the surface of the shielding copper rod ring is smooth and regular, and the electric field intensity of the metal surface is greatly reduced because the metal surface is covered with the insulation layer; meanwhile, because the conductor is not closed, induced current cannot be generated in the magnetic field environment of the transformer, and conductor heating caused by circulating current loss cannot be generated.
As shown in fig. 3, it is a schematic view of the installation of the pull tape shielding ring structure according to the embodiment of the present invention. The transformer is provided with transformer core 5, iron core folder web 6, and stretching strap 7 is transformer core's fastening component, and the assembly of stretching strap 7 is in iron core folder web 6's fixed position (bearing bracket to one side), at the below installation of stretching strap 7 the utility model discloses stretching strap shielding ring constructs 8, all requires the installation to arrange this shielding ring to construct 8 to transformer high-low pressure side and upper and lower portion moreover.
A method for installing a pull strip shielding ring structure comprises the following steps:
and 2, fixing the grounding wire 4 of the pull belt shielding ring structure 8 at a connecting screw hole of the web 6 of the iron core clamp to ensure reliable grounding.
As shown in fig. 4, it is an electric field analysis cloud chart after the structure of the shielding ring of the pull belt of the embodiment of the present invention is installed.
As can be seen from the electric field distribution cloud picture, the novel shielding structure plays a good role in uniform electric field for the horizontal outer side and the lower side of the clamp pull belt assembly structure, and meanwhile, the L-type paperboard structure is additionally arranged on the outer side of the novel shielding ring structure to further cut apart the long oil gap inside the transformer, so that the insulation reliability is improved.
Finally, it is to be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (1)
1. A pull strap shield ring structure, comprising: copper bar ring (1), insulating paper (2), insulating paper board (3), earth connection (4), copper bar ring (1) for the inside and outside rectangle not closed loop that double-deck bar copper was buckled into, including with insulating paper board (3) interval back, wrap insulating paper (2) in the outside is unified between the two-layer bar copper inside and outside, draw earth connection (4) with copper bar ring (1) with the copper strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921899169.XU CN211088061U (en) | 2019-11-05 | 2019-11-05 | Pull belt shielding ring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921899169.XU CN211088061U (en) | 2019-11-05 | 2019-11-05 | Pull belt shielding ring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211088061U true CN211088061U (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921899169.XU Active CN211088061U (en) | 2019-11-05 | 2019-11-05 | Pull belt shielding ring structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN211088061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589215A (en) * | 2021-08-09 | 2021-11-02 | 武汉磐电科技股份有限公司 | 110kV voltage transformer's on-vehicle calibration equipment and calibration pick up car |
-
2019
- 2019-11-05 CN CN201921899169.XU patent/CN211088061U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589215A (en) * | 2021-08-09 | 2021-11-02 | 武汉磐电科技股份有限公司 | 110kV voltage transformer's on-vehicle calibration equipment and calibration pick up car |
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