CN220526680U - Lightning-proof dry-type capacitance transformer sleeve - Google Patents
Lightning-proof dry-type capacitance transformer sleeve Download PDFInfo
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- CN220526680U CN220526680U CN202322179091.7U CN202322179091U CN220526680U CN 220526680 U CN220526680 U CN 220526680U CN 202322179091 U CN202322179091 U CN 202322179091U CN 220526680 U CN220526680 U CN 220526680U
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- flange
- insulating
- core sleeve
- lightning
- insulating core
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- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000009194 climbing Effects 0.000 abstract description 6
- 239000011810 insulating material Substances 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses an anti-lightning dry-type capacitive transformer bushing, which belongs to the technical field of transformer accessories and comprises a core body, wherein the core body comprises a conductive rod and an insulating core sleeve; one end of the conducting rod is connected with a gas-insulated fully-closed combined electrical appliance, and the other end of the conducting rod is connected with a voltage equalizing ball; the insulating core sleeve is formed by alternately winding a plurality of insulating layers and a plurality of capacitance shielding layers; the climbing-increasing umbrella skirt is arranged on the insulating core sleeve; the first connecting flange group is sleeved on the insulating core sleeve and is positioned between the gas-insulated fully-closed combined electrical appliance and the climbing-increasing umbrella skirt; the second coupling flange group is sleeved on the insulating core sleeve and positioned between the climbing enhancing umbrella skirt and the equalizing ball; the utility model uses the insulating core sleeve formed by alternately winding the multi-layer insulating layers and the multi-layer capacitance shielding layers, can uniformly distribute the insulating margin, fully utilizes the insulating material, ensures the equal field intensity margin of the insulating core sleeve in the radial direction and the axial direction, and greatly improves the lightning-cutting impulse resistance and the partial discharge level of the product.
Description
Technical Field
The utility model relates to the technical field of transformer accessories, in particular to an anti-lightning dry-type capacitor transformer bushing.
Background
The transformer sleeve is a main insulating device outside the transformer box and is used for leading high-voltage outgoing lines and low-voltage outgoing lines inside the transformer to the outside of the oil tank, so that the outgoing lines, the outgoing lines and the transformer shell and the outgoing lines and the ground are insulated, and the transformer sleeve can also play a role in fixing the outgoing lines; the transformer bushing is one of the current carrying elements of the transformer, and long-term passing of load current occurs during the operation of the transformer; the capacitive transformer bushing is mainly applied to high-voltage transformers with voltage higher than 100 kV.
The GAS insulated fully-enclosed combined electrical apparatus (GIS, GAS insulated SWITCHGEAR) is widely applied not only in the high voltage and ultra-high voltage fields, but also in the ultra-high voltage fields; compared with the conventional open-type transformer substation, the gas-insulated fully-closed combined electrical appliance has the advantages of compact structure, small occupied area, high reliability, flexible configuration, convenient installation, strong safety, strong environment adaptability, small maintenance workload and the like; the transformer bushing applied to the gas-insulated fully-enclosed combined electrical appliance has higher requirements on the aspects of partial discharge level, lightning-cutting shock resistance and the like, and the conventional dry-type capacitor transformer bushing is difficult to meet the requirements.
Therefore, designing a dry-type capacitive transformer bushing with excellent partial discharge level and lightning-cut surge capability is a problem to be solved in the present stage.
Disclosure of Invention
The utility model provides an anti-lightning dry-type capacitor transformer bushing, which is characterized in that a plurality of insulating layers and a plurality of capacitor shielding layers are alternately wound to form an insulating core sleeve, so that the insulating margin of the insulating core sleeve can be uniformly distributed, insulating materials in the insulating core sleeve can be fully utilized, the field strength margin of the insulating core sleeve in the radial direction and the axial direction is ensured to be equal, the anti-lightning-surge impact capability and the partial discharge level of a product are greatly improved, the requirement of a gas-insulated fully-closed combined electrical appliance is met, the structure is simple, the use is convenient, and the safety is high.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
an anti-lightning dry-type capacitive transformer bushing, comprising:
the core body comprises a conductive rod and an insulating core sleeve wrapping the conductive rod; one end of the conducting rod is connected with a gas-insulated fully-closed combined electrical appliance, and the other end of the conducting rod is connected with a voltage equalizing ball; the insulating core sleeve is formed by alternately winding a plurality of insulating layers and a plurality of capacitance shielding layers;
the climbing-increasing umbrella skirt is sleeved on the insulating core sleeve;
the first connecting flange group is sleeved on the insulating core sleeve and is positioned between the gas-insulated fully-closed combined electrical appliance and the climbing-increasing umbrella skirt;
and the second coupling flange group is sleeved on the insulating core sleeve and is positioned between the climbing-increasing umbrella skirt and the pressure equalizing ball.
As a preferable technical scheme, the conducting rod is coupled with the gas-insulated fully-closed combined electrical appliance through an SF6 connecting piece.
As a preferable technical scheme, the insulating layer is made of glass fiber impregnated with epoxy resin; the capacitive shielding layer is made of semiconductor materials.
As a preferable technical scheme, the insulating core sleeve is formed by spirally and alternately winding the insulating layer and the capacitive shielding layer at intervals and then solidifying at a high temperature.
As an optimal technical scheme, the climbing-increasing umbrella skirt is made of ceramic materials.
As a preferable technical scheme, the first connecting flange group comprises a first flange and a second flange which are matched, the second flange is abutted with one end of the climbing-enhancing umbrella skirt, and the first flange is connected with the second flange through bolts.
As a preferable technical scheme, the second coupling flange group comprises a third flange and a fourth flange which are matched, the third flange is abutted with the other end of the climbing-enhancing umbrella skirt, and the third flange is connected with the fourth flange through bolts.
As a preferable technical scheme, sealing rings are respectively arranged between the first flange, the second flange, the third flange and the fourth flange and the insulating core sleeve;
and/or sealing rings are arranged between the first flange and the second flange and between the third flange and the fourth flange.
As an optimized technical scheme, a positioning retainer ring is arranged between the gas-insulated fully-closed combined electrical apparatus and the first flange, and the positioning retainer ring is sleeved on the insulating core sleeve.
As a preferable technical scheme, an insulating sheath is arranged between the fourth flange and the equalizing ball; the insulating sheath is sleeved on the insulating core sleeve; a first step positioning surface is arranged at the position of the insulating core sleeve corresponding to the insulating sheath, and a second step positioning surface is arranged at the position of the insulating sheath corresponding to the step positioning surface;
and/or the fourth flange is provided with a measuring terminal;
and/or, the fourth flange is provided with a gas release channel communicated with the end face and the peripheral face, and a gas release bolt in threaded connection with the gas release channel is arranged in the gas release channel;
and/or, the fourth flange is provided with a plurality of lifting holes and a plurality of grounding holes.
The beneficial effects of the utility model are as follows:
1. the utility model uses the insulating core sleeve formed by alternately winding the multi-layer insulating layers and the multi-layer capacitance shielding layers, can uniformly distribute the insulating margin of the insulating core sleeve, fully utilizes the insulating material in the insulating core sleeve, ensures the equal field strength margin of the insulating core sleeve in the radial direction and the axial direction, greatly improves the lightning-proof wave-cutting impact capability and the partial discharge level of the product, meets the requirements of the gas-insulated fully-closed combined electrical appliance, and has simple structure, convenient use and high safety.
2. The utility model can further improve the insulation effect while protecting the insulation core sleeve by utilizing the climbing-increasing umbrella skirt; the first coupling flange group and the second coupling flange group can be utilized to position the climbing-increasing umbrella skirt and simultaneously facilitate the assembly and the installation of the product.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of a lightning-resistant dry-type capacitive transformer bushing of the present utility model;
FIG. 2 is an enlarged view of area A of FIG. 1;
FIG. 3 is an enlarged view of region B of FIG. 1;
fig. 4 is a schematic structural view of the fourth flange in fig. 1.
In the figure: 1-conducting rod, 2-insulating core sleeve, 21-insulating layer, 22-capacitance shielding layer, 3-SF6 connecting piece, 4-voltage equalizing ball, 5-climbing chute, 61-first flange, 62-second flange, 71-third flange, 72-fourth flange, 721-measuring terminal, 722-gassing passageway, 723-lifting hole, 724-grounding hole, 8-location retaining ring, 9-insulating sheath.
Detailed Description
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
Referring to fig. 1-4, an embodiment of a lightning-proof dry-type capacitor transformer bushing according to the present utility model includes:
the core body comprises a conducting rod 1 and an insulating core sleeve 2 wrapping the conducting rod 1; one end of the conducting rod 1 is connected with a gas-insulated fully-closed combined electrical appliance, the other end of the conducting rod 1 is connected with a voltage-equalizing ball 4, and the voltage-equalizing ball 4 can optimize electric field distribution and avoid overlarge field intensity in individual areas; the insulating core sleeve 2 is formed by alternately winding a plurality of insulating layers 21 and a plurality of capacitance shielding layers 22, so that the insulating margin of the insulating core sleeve 2 can be uniformly distributed, the insulating materials in the insulating core sleeve 2 are fully utilized, the field strength margin of the insulating core sleeve 2 in the radial direction and the axial direction is ensured to be equal, and the lightning-cutting shock resistance and the partial discharge level of a product are greatly improved;
the climbing-increasing umbrella skirt 5 is sleeved on the insulating core sleeve 2, and the climbing-increasing umbrella skirt 5 sleeve can play a better insulating effect while protecting the insulating core sleeve 2;
the first connecting flange group is sleeved on the insulating core sleeve 2 and is positioned between the gas-insulated fully-closed combined electrical appliance (not shown in the figure) and the climbing-increasing umbrella skirt 5; the second coupling flange group is sleeved on the insulating core sleeve 2 and is positioned between the climbing increasing umbrella skirt 5 and the equalizing balls 4, and the first coupling flange group and the second coupling flange group can be used for positioning the climbing increasing umbrella skirt 5 and simultaneously facilitating the assembly and installation of products.
In this embodiment, referring to fig. 1, the conductive rod 1 is coupled to the gas-insulated fully-enclosed electrical apparatus through an SF6 connector 3, specifically, the SF6 connector 3 is sleeved on the conductive rod 1, and an O-ring is disposed on a contact surface between the SF6 connector 3 and the conductive rod 1.
The insulating layer 21 is preferably made of high-insulation glass fiber impregnated with low-viscosity high-temperature-resistant epoxy resin; the capacitive shield layer 22 is preferably made of a semiconductor material; further, the insulating layer 21 and the capacitive shielding layer 22 of the insulating core sleeve 2 are spirally and alternately wound at intervals under the action of winding equipment, so that the insulating layer 21 and the capacitive shielding layer 22 are guaranteed to have the same deformation and initial tension, and then the insulating core sleeve 2 in a solid state can be formed by curing at a high temperature.
The climbing umbrella skirt 5 is preferably made of ceramic materials; the first flange 61, the second flange 62, the third flange 71 and the fourth flange 72 are preferably made of a high strength aluminum alloy.
In this embodiment, referring to fig. 1 to 3, the first coupling flange group includes a first flange 61 and a second flange 62 that are matched, the second flange 62 is abutted to one end of the climbing-increasing umbrella skirt 5, and the first flange 61 and the second flange 62 are connected by bolts, so that the position of the climbing-increasing umbrella skirt 5 can be effectively positioned from one side; the second coupling flange group includes matched third flange 71 and fourth flange 72, and the third flange 71 and the other end butt of increasing the umbrella skirt 5 of climbing, and third flange 71 and fourth flange 72 pass through bolted connection, can increase the position of climbing umbrella skirt 5 from the effectual location of opposite side.
It should be noted that, sealing rings are preferably arranged between the first flange 61, the second flange 62, the third flange 71 and the fourth flange 72 and the insulating core sleeve 2 respectively, so as to ensure the sealing effect; similarly, sealing rings are also arranged between the first flange 61 and the second flange 62 and between the third flange 71 and the fourth flange 72, so that the sealing effect is ensured.
In this embodiment, referring to fig. 1 and 2, a positioning retainer ring 8 is disposed between the gas-insulated fully-enclosed electrical apparatus and the first flange 61, the positioning retainer ring 8 can effectively position the first coupling flange set, and the positioning retainer ring 8 can be sleeved and fixed on the insulating core sleeve 2 by interference connection or adhesion.
In this embodiment, referring to fig. 1 and 3, an insulating sheath 9 is disposed between the fourth flange 72 and the equalizing ball 4; the insulating sheath 9 is sleeved on the insulating core sleeve 2; the position of the insulating core sleeve 2 corresponding to the insulating sheath 9 is provided with a first step positioning surface, the position of the insulating sheath 9 corresponding to the step positioning surface is provided with a second step positioning surface, and the position of the insulating sheath 9 can be positioned through the matched first step positioning surface and second step positioning surface; furthermore, a retainer ring is also arranged between the insulating sheath 9 and the equalizing ball 4, and the retainer ring can position the position of the second coupling flange group while positioning the insulating sheath 9.
In the present embodiment, referring to fig. 1 and 3, a measuring terminal 721 is disposed on the fourth flange 72, and the measuring terminal 721 is used for measuring information such as air pressure and temperature in the core; the fourth flange 72 is provided with a gas release channel 722 which communicates the end face and the peripheral face, a gas release bolt in threaded connection with the gas release channel 722 is arranged in the gas release channel 722, and the gas accumulated at the end face of the fourth flange 72 can be timely discharged by the gas release channel 722; the fourth flange 72 is provided with a plurality of lifting holes 723 and a plurality of grounding holes 724, wherein the lifting holes 723 are used for lifting the utility model, the grounding holes 724 are used for connecting with the ground wire, and the lightning-proof effect is improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. An anti-lightning dry-type capacitive transformer bushing, comprising:
the core body comprises a conductive rod (1) and an insulating core sleeve (2) wrapping the conductive rod (1); one end of the conducting rod (1) is connected with a gas-insulated fully-closed combined electrical appliance, and the other end of the conducting rod (1) is connected with a voltage equalizing ball (4); the insulating core sleeve (2) is formed by alternately winding a plurality of insulating layers (21) and a plurality of capacitive shielding layers (22);
the climbing-increasing umbrella skirt (5) is sleeved on the insulating core sleeve (2);
the first connecting flange group is sleeved on the insulating core sleeve (2) and is positioned between the gas-insulated fully-closed combined electrical appliance and the climbing-increasing umbrella skirt (5);
the second coupling flange group is sleeved on the insulating core sleeve (2) and is positioned between the climbing-increasing umbrella skirt (5) and the pressure equalizing ball (4).
2. An anti-lightning dry-type capacitive transformer bushing according to claim 1, characterized in that the conducting rod (1) is coupled to the gas-insulated fully enclosed electrical unit by means of an SF6 connection (3).
3. A lightning-resistant dry-type capacitive transformer bushing according to claim 1, characterized in that the insulating layer (21) is made of glass fibres impregnated with an epoxy resin; the capacitive shielding layer (22) is made of a semiconductor material.
4. A lightning-proof dry-type capacitive transformer bushing according to claim 1 or 3, characterized in that the insulating core sleeve (2) is formed by high-temperature curing after the insulating layer (21) and the capacitive shielding layer (22) are wound at intervals in a spiral.
5. The lightning-resistant dry-type capacitive transformer bushing according to claim 1, wherein the climbing-enhancing umbrella skirt (5) is made of ceramic material.
6. The lightning-resistant dry-type capacitive transformer bushing according to claim 1, wherein the first coupling flange group comprises a first flange (61) and a second flange (62) which are matched, the second flange (62) is abutted with one end of the climbing-enhancing umbrella skirt (5), and the first flange (61) and the second flange (62) are connected through bolts.
7. The lightning-resistant dry-type capacitive transformer bushing according to claim 6, wherein the second coupling flange group comprises a third flange (71) and a fourth flange (72) which are matched, the third flange (71) is abutted with the other end of the climbing-enhancing umbrella skirt (5), and the third flange (71) and the fourth flange (72) are connected through bolts.
8. The lightning-resistant dry-type capacitor transformer bushing according to claim 7, wherein sealing rings are arranged between the first flange (61), the second flange (62), the third flange (71) and the fourth flange (72) and the insulating core sleeve (2), respectively;
and/or sealing rings are arranged between the first flange (61) and the second flange (62) and between the third flange (71) and the fourth flange (72).
9. The lightning-resistant dry-type capacitor transformer bushing according to claim 6, wherein a positioning retainer ring (8) is arranged between the gas-insulated fully-closed combined electrical apparatus and the first flange (61), and the positioning retainer ring (8) is sleeved on the insulating core sleeve (2).
10. The lightning-resistant dry-type capacitive transformer bushing according to claim 7, characterized in that an insulating sheath (9) is arranged between the fourth flange (72) and the pressure equalizing ball (4); the insulating sheath (9) is sleeved on the insulating core sleeve (2); a first step positioning surface is arranged at the position of the insulating core sleeve (2) corresponding to the insulating sheath (9), and a second step positioning surface is arranged at the position of the insulating sheath (9) corresponding to the step positioning surface;
and/or, the fourth flange (72) is provided with a measuring terminal (721);
and/or, the fourth flange (72) is provided with a gas release channel (722) which communicates the end face and the peripheral face, and a gas release bolt in threaded connection with the gas release channel (722) is arranged in the gas release channel;
and/or, the fourth flange (72) is provided with a plurality of lifting holes (723) and a plurality of grounding holes (724).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322179091.7U CN220526680U (en) | 2023-08-14 | 2023-08-14 | Lightning-proof dry-type capacitance transformer sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322179091.7U CN220526680U (en) | 2023-08-14 | 2023-08-14 | Lightning-proof dry-type capacitance transformer sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220526680U true CN220526680U (en) | 2024-02-23 |
Family
ID=89933556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322179091.7U Active CN220526680U (en) | 2023-08-14 | 2023-08-14 | Lightning-proof dry-type capacitance transformer sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220526680U (en) |
-
2023
- 2023-08-14 CN CN202322179091.7U patent/CN220526680U/en active Active
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