CN210775584U - Transformer end screen auxiliary test device - Google Patents
Transformer end screen auxiliary test device Download PDFInfo
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- CN210775584U CN210775584U CN201921276387.8U CN201921276387U CN210775584U CN 210775584 U CN210775584 U CN 210775584U CN 201921276387 U CN201921276387 U CN 201921276387U CN 210775584 U CN210775584 U CN 210775584U
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- butt joint
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- end screen
- sleeve
- auxiliary test
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Abstract
The utility model relates to a transformer end screen auxiliary test device, including a cylindric take out lid, should take a percentage the lid lower extreme is vertical to have seted up cylindric notch up, and the mounting groove has been seted up at this notch top, and this mounting groove top has set firmly a copper butt joint cover, and this copper butt joint cover lower extreme overcoat has connect the epoxy cover, take out the lid and seted up a through-hole at its nearly top slant down and accesss to the mounting groove in, this transformer end screen auxiliary test device simple structure is reasonable, convenient high efficiency.
Description
Technical Field
The utility model discloses end screen ground connection technical field, in particular to transformer end screen auxiliary test device.
Background
The detection work of transformer bushings (capacitive screens) of power plants is an important link in transformer test, and is a work for detecting whether the transformer bushings are qualified or not, and particularly the low-voltage side bushings can be completed only by matching with multiple persons for wiring. The field repair and test personnel for manual wiring often use a straight screwdriver to forcibly push and push away the sleeve pipe end screen grounding metal cap from one side and two hands by strong force to expose a lead pin hole, and the other person inserts the test wiring into the pin hole for butt joint. Therefore, the unilateral stress of the end screen spring is easily caused, and the end screen spring cannot be normally recovered or jammed, so that the end screen is opened. This wiring is time consuming and labor intensive. Therefore, how to simply, conveniently, quickly and accurately complete the wiring work, improve the efficiency of field testers, reduce the workload of debugging personnel and become a problem to be solved urgently.
At present, a plurality of sleeve pipe end screen outgoing lines of transformers in transformer substations and power plants are welded on lead posts (end screen outgoing terminals), a grounding metal cap pressed by a spring is arranged outside each lead post, the grounding sleeve is contacted with an end screen seat under the pressure of an internal spring during operation, an end screen is reliably grounded through the position, and the outermost part is protected by a metal protective sleeve cover and is sealed and moistureproof. The old casing end screen has several problems in the test, which are mainly reflected in the following 2 aspects:
(1) when the spring under the grounding metal cap is excessively pressed, permanent deformation is easy to occur, the pressing force of the spring is reduced, so that the end screen cannot be effectively grounded, and the internal and external suspension potentials of the sleeve are discharged.
(2) When the end screen of the sleeve needs to be grounded and disconnected in the tests such as the sleeve dielectric loss, the right way is to use a special tool to jack the grounding sleeve open, and use a plug pin to be inserted into a pin hole of a lead pin column, so that the end screen of the sleeve is temporarily disconnected from the ground for testing. However, field repair and test personnel often use a straight screwdriver to forcibly squeeze and push away the sleeve pipe end screen grounding metal cap from a single side, so that the end screen spring is stressed on the single side and cannot be normally restored or jammed, and an open circuit is caused in the end screen. The end screen is a large capacitor, a high suspension voltage is formed to the ground, the discharge of the end screen to the ground is caused, an internal insulating part is burnt, and meanwhile, the casing oil is cracked to generate hydrogen, acetylene and total hydrocarbon, and a casing explosion accident can be caused in serious cases.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of prior art, the utility model aims to solve the technical problem that a transformer end screen auxiliary test device is provided, not only rational in infrastructure, it is safe in utilization high-efficient moreover.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a transformer end screen auxiliary test device, is including a cylindric take out the skull, should take a percentage and cover the vertical cylindric notch of having seted up of lower extreme, and the mounting groove has been seted up vertically up at this notch top, and this mounting groove top has set firmly a copper butt joint cover, and this copper butt joint cover lower extreme overcoat has connect the epoxy cover, take out the skull and seted up a through-hole near its top slant and accesss to in the mounting groove down.
Furthermore, an internal thread is arranged in the notch and is used for being in threaded connection with an external thread outside the lower end screen seat.
Furthermore, the copper butt joint sleeve and the epoxy resin sleeve are both cylindrical tubular, the diameter of the epoxy resin sleeve is equal to that of a grounding metal cap in the tail screen seat, and the diameter of the copper butt joint sleeve is equal to that of a lead post vertically inserted into the center in the tail screen seat.
Furthermore, the copper butt joint sleeve and the epoxy resin sleeve are fixedly arranged into a whole, and the horizontal height of the bottom end of the epoxy resin sleeve is lower than that of the bottom end of the copper butt joint sleeve.
Furthermore, a sealing rubber ring is arranged at the contact position of the bottom end surface of the tapping cover and the upper end surface of the end screen seat.
Compared with the prior art, the utility model discloses following beneficial effect has: 1) the main body can be jointed with the original sleeve terminal screen seat, and the damage of the base thread can not be caused. The operation of one person with one hand can be easily realized in a narrow space, and the working efficiency is greatly improved.
2) The round epoxy resin sleeve is embedded in the tap cover, so that the grounding metal cap is uniformly stressed, and the deformation of a spring in the grounding metal cap due to improper operation or unilateral stress is avoided; the grounding metal cap and the wiring terminal are completely isolated to achieve a good insulation effect. Therefore, the psychological burden of experiment operators for worrying about end screen damage caused by human factors during wiring is greatly reduced. Thereby effectively improving the working quality.
Through this transformer end screen auxiliary test device, need not many people simultaneously operate, liberated the manpower, can not make end screen seat inner spring unilateral atress and damage again, simple structure, convenient high efficiency.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of the internal structure of the end screen seat.
In the figure: 1-a drawer cover, 2-a notch, 3-a mounting groove, 4-a copper butt joint sleeve, 5-an epoxy resin sleeve, 6-a through hole, 7-a tail screen seat, 8-a metal cap, 9-a lead post, 10-a sealing rubber ring and 11-a spring.
Detailed Description
As shown in fig. 1-2, a transformer end screen auxiliary test device, including a cylindric lid 1 of taking a percentage, should take a percentage the lid lower extreme is vertical to be seted up cylindric notch 2 up, and the vertical mounting groove 3 of having seted up in this notch top, this mounting groove top has set firmly a copper butt joint cover 4, and this copper butt joint cover lower extreme overcoat has connect epoxy cover 5, take out the lid and seted up a through-hole 6 and lead to in the mounting groove near its top slant down.
In an embodiment of the present invention, an internal thread is provided in the notch for screwing with an external thread outside the lower end screen seat.
In the embodiment of the utility model, the copper butt joint sleeve and the epoxy resin sleeve are both in a cylindrical tubular shape, the diameter of the epoxy resin sleeve is equal to that of the grounding metal cap 8 in the end screen seat 7, and the diameter of the copper butt joint sleeve is equal to that of the lead post 9 vertically inserted in the center in the end screen seat; since the internal structure of the end screen seat is the prior art, it is not described in detail.
In the embodiment of the present invention, the copper butt-joint sleeve and the epoxy sleeve are fixed as a whole, and the level of the bottom of the epoxy sleeve is lower than the level of the bottom of the copper butt-joint sleeve.
In the embodiment of the present invention, the contact position between the bottom surface of the tapping cap and the upper end surface of the end screen seat is provided with a sealing rubber ring 10.
The utility model discloses theory of operation of embodiment: when the detection work is needed, the original tap cover is firstly dismounted, then the device is screwed to the end screen seat, in the rotating process, the epoxy resin sleeve in the tap cover is firstly contacted with the grounding metal cap below, the grounding metal cap moves downwards in the process of downwards rotating the tap cover, the spring 11 is compressed to disconnect the end screen from the ground, when the tap cover is completely screwed on the tail screen seat, the upper end of the lead post in the grounding metal cap is exposed and contacted with the copper butt joint sleeve of the tap cover, and finally, the test can be carried out only by inserting the test wiring into the mounting groove from the through hole to be butt jointed with the copper butt joint sleeve, so that the wiring work can be simply, conveniently, quickly and accurately completed, the efficiency of field test workers is improved, and the workload of debugging personnel is reduced, the test device can be widely applied to the field test of the high-low side bushing of the main transformer of a 110kV transformer substation and a 100MW power plant.
The present invention is not limited to the above preferred embodiment, and any one can obtain the auxiliary testing device for the end screen of the transformer in other various forms. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The utility model provides a transformer end screen auxiliary test device which characterized in that: including a cylindric take out lid, should take a percentage and cover the vertical cylindric notch of having seted up of lower extreme, the vertical mounting groove of having seted up in this notch top, this mounting groove top has set firmly a copper butt joint cover, and this copper butt joint cover lower extreme overcoat has connect the epoxy cover, take out the lid and seted up a through-hole at its nearly top slant downwards and accesss to in the mounting groove.
2. The transformer tap auxiliary test device according to claim 1, characterized in that: the notch is internally provided with an internal thread for being in threaded connection with an external thread outside the lower end screen seat.
3. The transformer tap auxiliary test device according to claim 1, characterized in that: the copper butt joint sleeve and the epoxy resin sleeve are both cylindrical tubular, the diameter of the epoxy resin sleeve is equal to that of a grounding metal cap in the tail screen seat, and the diameter of the copper butt joint sleeve is equal to that of a lead post vertically inserted in the center in the tail screen seat.
4. The transformer tap auxiliary test device according to claim 1, characterized in that: the copper butt joint sleeve and the epoxy resin sleeve are fixedly arranged into a whole, and the horizontal height of the bottom end of the epoxy resin sleeve is lower than that of the bottom end of the copper butt joint sleeve.
5. The transformer tap auxiliary test device according to claim 1, characterized in that: and a sealing rubber ring is arranged at the contact position of the bottom end surface of the tapping cover and the upper end surface of the end screen seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921276387.8U CN210775584U (en) | 2019-08-08 | 2019-08-08 | Transformer end screen auxiliary test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921276387.8U CN210775584U (en) | 2019-08-08 | 2019-08-08 | Transformer end screen auxiliary test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210775584U true CN210775584U (en) | 2020-06-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921276387.8U Active CN210775584U (en) | 2019-08-08 | 2019-08-08 | Transformer end screen auxiliary test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN210775584U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917199A (en) * | 2021-10-22 | 2022-01-11 | 广东电网有限责任公司 | Safe and quick connecting device |
| CN114204289A (en) * | 2021-11-19 | 2022-03-18 | 国网山西省电力公司电力科学研究院 | Capacitive bushing end screen grounding device |
-
2019
- 2019-08-08 CN CN201921276387.8U patent/CN210775584U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917199A (en) * | 2021-10-22 | 2022-01-11 | 广东电网有限责任公司 | Safe and quick connecting device |
| CN113917199B (en) * | 2021-10-22 | 2024-02-13 | 广东电网有限责任公司 | Safe and quick connecting device |
| CN114204289A (en) * | 2021-11-19 | 2022-03-18 | 国网山西省电力公司电力科学研究院 | Capacitive bushing end screen grounding device |
| CN114204289B (en) * | 2021-11-19 | 2024-04-26 | 国网山西省电力公司电力科学研究院 | Capacitive bushing end screen grounding device |
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