CN204330914U - A kind of Transformer Bushing Tap monitoring device - Google Patents
A kind of Transformer Bushing Tap monitoring device Download PDFInfo
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- CN204330914U CN204330914U CN201420771269.5U CN201420771269U CN204330914U CN 204330914 U CN204330914 U CN 204330914U CN 201420771269 U CN201420771269 U CN 201420771269U CN 204330914 U CN204330914 U CN 204330914U
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- transformer
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- bushing
- monitoring device
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Abstract
The utility model discloses a kind of Transformer Bushing Tap monitoring device, cross-core type sensor is arranged in the cavity that ground connection lid and bottom seat encloses by this device, and stem is arranged in the magnetic core of described cross-core type sensor, and draw in the hole worn at the top that the signal wire of cross-core type sensor is covered by described ground connection.The utility model achieves the integration of sensor and bottom shielding of bushing, do not need when mounted to carry out corresponding transformation to bushing shell for transformer, meanwhile, due to sensor is built in bottom shielding of bushing, avoid the impact of outside electromagnetic interference on sensor, Monitoring Data is more accurate.Because the utility model middle sleeve end shield still have employed traditional earthing mode by ground connection lid and bottom seat, therefore do not need external ground, so reduce external ground cause the risk of imperfect earth.Transformer Bushing Tap monitoring device structure of the present utility model is simple, installs reliable, safer than existing bottom shielding of bushing monitoring device.
Description
Technical field
The utility model relates to bushing shell for transformer on-line monitoring field, particularly a kind of Transformer Bushing Tap monitoring device.
Background technology
Bushing, as the electrical equipment used in transformer station, is mainly used in the insulation against ground of transformer, reactor and high pressure line, support and current-carrying etc.High gland can be divided into bushing shell for transformer, reactor sleeve pipe, wall bushing etc.
For bushing shell for transformer, generally can be divided into filling type sleeve pipe and condenser-type terminal.Wherein, the cable paper in filling type sleeve pipe is similar to all pressures pole plate in condenser-type terminal.Capacitor core in condenser-type terminal is the capacitor of a string coaxial cylindrical.Filling type sleeve pipe can be divided into again single oil clearance and heavy wool gap sleeve pipe, and condenser-type terminal can be divided into again gummed paper and oilpaper sleeve pipe.
In the application, the insulation of transformer and capacitive equipment is very important, which determines the capable energy of Technical Economy and the operational reliability of transformer and bushing shell for transformer.The insulation of transformer and bushing shell for transformer is in operation and is subject to the effect of electricity, heat and mechanical stress and environmental stress, and its performance can decline gradually along with the passing of service time, and state of insulation can be deteriorated in other words, finally loses insulation function.And the aging of insulation is a progressive formation, if found not in time, transformer and bushing shell for transformer just may be caused to break down, even paroxysmal electric power accident, cause huge direct and consequential damage.
In order to tackle the problems referred to above, in condenser-type terminal, add bottom shielding of bushing, for the monitoring to bushing shell for transformer.Existing widely used a kind of bottom shielding of bushing structure as shown in Figure 1, it comprises stem 11, ground connection lid 12 and base 13, wherein, described base 13 is installed on bushing shell for transformer 2 outside surface and with the electrical contact of bushing shell for transformer 2 outside surface with external surface grounded by described bushing shell for transformer 2, described stem 11 is electrically connected on the outer capacitor layers 21 in bushing shell for transformer 2, and be arranged in base 13, formed with sleeve surface when passing described bushing shell for transformer 2 for preventing stem 11 and be electrically connected, insulation course 15 is arranged with outside stem 11, ground connection lid 12 is covered on and is wrapped in cavity that ground connection lid 12 and base 13 formed on described base 13 and by described stem 11, described ground connection lid 12 is electrically connected with between base 13, the inside top surface that top and the ground connection of stem 11 cover 12 is electrically connected, and then define from stem 11 through the conductive path of ground connection lid 12 to base 13, and base 13 passes through the external surface grounded of bushing shell for transformer 2, and then define the effective grounding of bottom shielding of bushing.In order to protection against the tide, between ground connection lid 12 and base 13, be provided with the boss structure matched, and sealing gasket 14 is set between the gap of boss structure, enter corrosion to prevent moisture.In order to be applicable to the requirements such as monitoring, maintenance, between ground connection lid 12 and base 13, the mode be threaded can be adopted, so that ground connection lid 12 dismounting.
In order to understand the running status of transformer and sleeve pipe, avoiding or reducing because insulation fault causes damage and unplanned power failure, needing to be monitored bushing shell for transformer by bottom shielding of bushing.For the bottom shielding of bushing structure shown in Fig. 1, bushing shell for transformer is monitored, ground connection lid 12 is needed to unload, and monitoring device is connected to stem 11, to monitor bushing shell for transformer leakage current and insulation situation, after end to be monitored, also need ground connection lid 12 to be installed on original place, to ensure the good earth of stem 11.This mode, because need often to dismantle ground connection lid 12, is difficult to ensure stem 11 effective grounding in normal operation, still affects the safe operation of transformer and sleeve pipe.
Therefore, a kind of improvement project is proposed.As shown in Figure 2, be the bottom shielding of bushing structure of existing a kind of improvement.This structure is that the ground connection of the bottom shielding of bushing shown in Fig. 1 lid 12 is replaced by insulating lid 16, and picks out lead-in wire from stem 11, and described lead-in wire is connected in cross-core type sensor 3, and the transformer 4 surface ground connection nearby of the installed position of cross-core type sensor 3.Cross-core type sensor 3 is formed primarily of the sensor magnetic core 31 of annular, and described lead-in wire passes from the center of sensor magnetic core 31, afterwards the transformer 4 surface ground connection nearby of the installed position of cross-core type sensor 3.Monitoring system by the monitor signal of real-time reception cross-core type sensor 3 and real-time analysis and then the Real-Time Monitoring that achieves the running status of separating transformer and sleeve pipe, and does not need to carry out disassemble and assemble work to bottom shielding of bushing at the scene.
In bottom shielding of bushing structure shown in Fig. 2, although achieve the Real-Time Monitoring to the running status of separating transformer and sleeve pipe, and do not need to carry out disassemble and assemble work to bottom shielding of bushing at the scene.But, cross-core type sensor 3 wherein is often installed on the transformer shell of bottom shielding of bushing, therefore, need during installation transform (such as punching) to transformer shell and affect the safety of existing transformer, in addition, lead-in wire from stem 11 to cross-core type sensor 3 part be exposed to outside and be easy to be subject to the interference of external electromagnetic field and affect the accurate of monitor signal, be connected to bushing shell for transformer surface or transformer shell surface during described wire ground often simultaneously, because bushing shell for transformer surface or transformer shell surface scribble paint to prevent corrosion, therefore, the good earth of described lead-in wire also receives impact.
Utility model content
In view of this, the utility model provides a kind of novel Transformer Bushing Tap monitoring device, to improve the safety of transformer and casing monitoring.
The technical scheme of the application is achieved in that
A kind of Transformer Bushing Tap monitoring device, comprises base, stem and ground connection lid; Wherein,
Described floor installation is also external surface grounded by described bushing shell for transformer in bushing shell for transformer outside surface;
Described stem is electrically connected on the outer capacitor layers in bushing shell for transformer, and draws from bushing shell for transformer at the medium position place of described base;
Described ground connection is covered on described base and is electrically connected with described base, and described stem is positioned at the cavity that described ground connection lid and bottom seat encloses, and the top of described stem is electrically connected with described ground connection lid;
Described Transformer Bushing Tap monitoring device also comprises cross-core type sensor and signal wire;
Described cross-core type sensor is positioned at the cavity that described ground connection lid and bottom seat encloses, and is sheathed on described stem;
Described signal wire is electrically connected on described cross-core type sensor, and by the hole that the top that described ground connection is covered wears, draws from described ground connection lid.
Further, described cross-core type sensor is made up of magnetic core and the coil being wound in described magnetic core; Wherein,
Described magnetic core is sheathed on described stem;
Described signal wire is electrically connected on described coil.
Further, insulation course is provided with between described stem and described bushing shell for transformer outside surface and between described base.
Further, hermetically-sealed construction is provided with between described base and ground connection lid.
Further, described hermetically-sealed construction comprises:
The bulge loop centered by described stem that described base has;
The platform matched with described bulge loop upper surface that the inner side of described ground connection lid has; And
The sealing gasket that space place between described bulge loop upper surface and described platform installs.
Further, the lateral surface of described bulge loop has external thread;
The inner side of described ground connection lid has the internal thread matched with described external thread;
Described ground connection lid is screwed on described base by described internal thread and external thread.
As can be seen from such scheme, Transformer Bushing Tap monitoring device of the present utility model achieves the integration of sensor and bottom shielding of bushing, do not need when mounted to carry out corresponding transformation to transformer and sleeve pipe, saved improvement expenses and avoided transformation risk.Meanwhile, owing to being built in bottom shielding of bushing by sensor, avoid the impact of outside electromagnetic interference on sensor, Monitoring Data is more accurate.Meanwhile, due in Transformer Bushing Tap monitoring device of the present utility model, bottom shielding of bushing still have employed traditional earthing mode by ground connection lid and bottom seat, does not therefore need external ground, so reduce external ground cause the risk of imperfect earth.Transformer Bushing Tap monitoring device structure of the present utility model is simple, installs reliable, safer than existing bottom shielding of bushing monitoring device.
Accompanying drawing explanation
Fig. 1 is existing a kind of bottom shielding of bushing structural representation;
Fig. 2 is the bottom shielding of bushing structural representation after existing a kind of improvement;
Fig. 3 is Transformer Bushing Tap monitoring device structural representation of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the utility model is described in further detail.
The Transformer Bushing Tap monitoring device example structure schematic diagram that Fig. 3 provides for the utility model, it comprises stem 11, ground connection lid 12 and base 13.Wherein, described base 13 is installed on bushing shell for transformer 2 outside surface and external surface grounded by described bushing shell for transformer 2.Described stem 11 is electrically connected on the outer capacitor layers 21 in bushing shell for transformer 2, and draws from bushing shell for transformer 2 at the medium position place of described base 13.Described ground connection lid 12 is covered on described base 13 and is electrically connected with described base 13, described stem 11 is positioned at described ground connection lid 12 and the cavity that encloses of described base 13, and, top and the described ground connection of described stem 11 are covered 12 and are electrically connected, and then the path ground that described stem 11 consists of described ground connection lid 12, base 13 and bushing shell for transformer 2.
Meanwhile, Transformer Bushing Tap monitoring device provided by the utility model also comprises cross-core type sensor 5 and signal wire 6.Wherein, described cross-core type sensor 5 is positioned at described ground connection lid 12 and the cavity that encloses of base 13, and is sheathed on described stem 11; Described signal wire 6 is electrically connected on described cross-core type sensor 5, and by the hole 122 that the top of described ground connection lid 12 wears, draws from described ground connection lid 12.Wherein, described cross-core type sensor 5 is made up of magnetic core 51 and the coil (not shown) being wound in described magnetic core 51, and wherein, described magnetic core 51 is sheathed on described stem 11, and signal wire 6 is electrically connected on described coil, to export measuring-signal.Described signal wire 6 is covered in the hole 122 that 12 tops wear by described ground connection draws, and then connects corresponding monitoring equipment.
Continue shown in Figure 3, in Transformer Bushing Tap monitoring device of the present utility model, for preventing from taking the lead between stem 11 and bushing shell for transformer 2 outside surface and between stem 11 and base 13 ground connection and the situation about cannot monitor caused, between stem 11 and the outside surface of bushing shell for transformer 2, and be provided with insulation course 15 between stem 11 and base 13.
Meanwhile, during in order to prevent from using for a long time, the long-time corrosion to Transformer Bushing Tap monitoring device inside of external environment (such as water vapour), also has hermetically-sealed construction in the utility model.Sealing structure comprises the bulge loop 131 centered by described stem 11 that described base 13 has, the platform 121 matched with described bulge loop 131 upper surface that the inner side of described ground connection lid 12 has; And, the sealing gasket 14 that the space place between described bulge loop 131 upper surface and platform 121 installs.
In addition, the lateral surface of described bulge loop 131 has external thread, and the inner side of described ground connection lid 12 has the internal thread matched with described external thread, and described ground connection lid 12 is by described internal thread and externally threadedly screw on described base 13.
Transformer Bushing Tap monitoring device of the present utility model achieves the integration of sensor and bottom shielding of bushing, does not need when mounted to carry out corresponding transformation to transformer and sleeve pipe, has saved improvement expenses and has avoided transformation risk.Meanwhile, owing to being built in bottom shielding of bushing by sensor, avoid the impact of outside electromagnetic interference on sensor, Monitoring Data is more accurate.Meanwhile, due in Transformer Bushing Tap monitoring device of the present utility model, bottom shielding of bushing still have employed traditional earthing mode by ground connection lid and bottom seat, does not therefore need external ground, so reduce external ground cause the risk of imperfect earth.Transformer Bushing Tap monitoring device structure of the present utility model is simple, installs reliable, safer than existing bottom shielding of bushing monitoring device.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the utility model protects.
Claims (6)
1. a Transformer Bushing Tap monitoring device, is characterized in that: comprise base, stem and ground connection lid; Wherein,
Described floor installation is also external surface grounded by described bushing shell for transformer in bushing shell for transformer outside surface;
Described stem is electrically connected on the outer capacitor layers in bushing shell for transformer, and draws from bushing shell for transformer at the medium position place of described base;
Described ground connection is covered on described base and is electrically connected with described base, and described stem is positioned at the cavity that described ground connection lid and bottom seat encloses, and the top of described stem is electrically connected with described ground connection lid;
Described Transformer Bushing Tap monitoring device also comprises cross-core type sensor and signal wire;
Described cross-core type sensor is positioned at the cavity that described ground connection lid and bottom seat encloses, and is sheathed on described stem;
Described signal wire is electrically connected on described cross-core type sensor, and by the hole that the top that described ground connection is covered wears, draws from described ground connection lid.
2. Transformer Bushing Tap monitoring device according to claim 1, is characterized in that:
Described cross-core type sensor is made up of magnetic core and the coil being wound in described magnetic core; Wherein,
Described magnetic core is sheathed on described stem;
Described signal wire is electrically connected on described coil.
3. Transformer Bushing Tap monitoring device according to claim 1, is characterized in that:
Insulation course is provided with between described stem and described bushing shell for transformer outside surface and between described base.
4. the Transformer Bushing Tap monitoring device according to any one of claims 1 to 3, is characterized in that, is provided with hermetically-sealed construction between described base and ground connection lid.
5. Transformer Bushing Tap monitoring device according to claim 4, is characterized in that, described hermetically-sealed construction comprises:
The bulge loop centered by described stem that described base has;
The platform matched with described bulge loop upper surface that the inner side of described ground connection lid has; And
The sealing gasket that space place between described bulge loop upper surface and described platform installs.
6. Transformer Bushing Tap monitoring device according to claim 5, is characterized in that:
The lateral surface of described bulge loop has external thread;
The inner side of described ground connection lid has the internal thread matched with described external thread;
Described ground connection lid is screwed on described base by described internal thread and external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420771269.5U CN204330914U (en) | 2014-12-09 | 2014-12-09 | A kind of Transformer Bushing Tap monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420771269.5U CN204330914U (en) | 2014-12-09 | 2014-12-09 | A kind of Transformer Bushing Tap monitoring device |
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| Publication Number | Publication Date |
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| CN204330914U true CN204330914U (en) | 2015-05-13 |
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| CN201420771269.5U Active CN204330914U (en) | 2014-12-09 | 2014-12-09 | A kind of Transformer Bushing Tap monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965128A (en) * | 2015-06-29 | 2015-10-07 | 国网天津市电力公司 | Multifunctional auxiliary test tool for bushing tap grounding device |
| CN105467286A (en) * | 2015-12-21 | 2016-04-06 | 许继（厦门）智能电力设备股份有限公司 | Local discharge detection device |
| CN106645822A (en) * | 2017-01-16 | 2017-05-10 | 江苏骏龙光电科技股份有限公司 | Voltage transformer insulation sleeve tube monitoring device and installation method therefor |
| CN112041945A (en) * | 2018-03-22 | 2020-12-04 | Abb电网瑞士股份公司 | Bushing with end shield assembly |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
-
2014
- 2014-12-09 CN CN201420771269.5U patent/CN204330914U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965128A (en) * | 2015-06-29 | 2015-10-07 | 国网天津市电力公司 | Multifunctional auxiliary test tool for bushing tap grounding device |
| CN104965128B (en) * | 2015-06-29 | 2017-09-15 | 国网天津市电力公司 | Bottom shielding of bushing earthing or grounding means multi-functional auxiliary testing instrument |
| CN105467286A (en) * | 2015-12-21 | 2016-04-06 | 许继（厦门）智能电力设备股份有限公司 | Local discharge detection device |
| CN106645822A (en) * | 2017-01-16 | 2017-05-10 | 江苏骏龙光电科技股份有限公司 | Voltage transformer insulation sleeve tube monitoring device and installation method therefor |
| CN112041945A (en) * | 2018-03-22 | 2020-12-04 | Abb电网瑞士股份公司 | Bushing with end shield assembly |
| US11270817B2 (en) | 2018-03-22 | 2022-03-08 | Hitachi Energy Switzerland Ag | Bushing with a tap assembly |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
| CN112731075B (en) * | 2020-12-17 | 2022-04-29 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
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