CN203325798U - Gas relay for transformer - Google Patents
Gas relay for transformer Download PDFInfo
- Publication number
- CN203325798U CN203325798U CN2013203671348U CN201320367134U CN203325798U CN 203325798 U CN203325798 U CN 203325798U CN 2013203671348 U CN2013203671348 U CN 2013203671348U CN 201320367134 U CN201320367134 U CN 201320367134U CN 203325798 U CN203325798 U CN 203325798U
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- Prior art keywords
- support
- gas
- rheostat
- transformer
- relay
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Abstract
The utility model relates to a gas relay for a transformer. The provided gas relay comprises an upper housing and a lower housing. A support is arranged in a cavity of the lowering housing; and the top end of the support is fixed at the upper housing; a baffle plate is connected to the support by a rotating way by a shaft; a dry-reed contact is fixed with the support; a driving floating ball is movably connected to the support by a support rod; and the inner surface of the upper housing is provided with a groove matched with the driving floating ball. A rheostat is fixed at the support; a moving connecting rod is arranged between the rheostat and the support rod; and the rheostat is connected with a wiring post I of a junction box I by a lead. With the gas relay, precise detection of the gas quantity can be realized. The gas relay not only has functions of the existing gas relay but also has the function of conversion of the gas quantity of a gas storage chamber of the relay into an electric signal; long-distance transmission is realized and the electric signal can be transmitted to a power management network terminal; the gas quantity detection range is from 2 to 500 milliliters and the error is less than 3 ml. Moreover, automatic and intelligent management of the running state of the transformer can be carried out conveniently and the construction demand of the intelligent power grid can be satisfied.
Description
Technical field
The utility model relates to a kind of relay, relates in particular to a kind of transformer Buchholz relay, is arranged between transformer and oil conservator in connecting tube, for the protection of the transformer safe operation, is applicable to oil immersed power transformer, belongs to the intelligent substation technical field.
Technical background
At present, international Buchholz relay commonly used is mainly used in monitoring gas flow the output alarm signal of the internal fault generations such as oil-immersed power transformer partial discharge; Also for monitoring transformer, because causing the transformer oil rapid expanding, the faults such as internal short-circuit send the transformer trip signal.Buchholz relay basic structure of the prior art is comprised of terminal box, air storage chamber, upper float, light gas alarming contact, flow velocity baffle plate, flow velocity tripping operation contact and housing etc.Its operation principle is: when transformer inside because partial discharge produces gas, when between transformer and oil conservator, connecting tube converges to the air storage chamber of Buchholz relay, upper float descends with the increase of gas flow, while dropping to certain position, light gas alarming contact is connected, and sends alarm signal.When transformer inside because the faults such as short circuit cause the transformer oil rapid expanding, while through connecting tube Rapid Flow between transformer and oil conservator, crossing Buchholz relay, oil stream impacts the flow velocity baffle plate, and baffle plate drives flow velocity tripping operation contact and connects and send the too fast trip signal of flow velocity.The technical problem of its existence is: only the air accumulation in the Buchholz relay air storage chamber just sends alarm signal when a certain amount of, and the gas flow in continuous monitoring at any time and control air storage chamber, information that more can not long-distance transmissions air storage chamber gas flow, can not meet the demand of China's intelligent grid.
Summary of the invention
The utility model, for above-mentioned the deficiencies in the prior art, provides a kind of transformer Buchholz relay, has solved the prior art repeat circuit problem of continuously accurate gas-monitoring amount at any time.
Technical solutions of the utility model are as follows:
Comprise upper shell, lower house, support is arranged in lower housing cavity, and cantilever tip is fixed on upper shell, and baffle plate is rotatably connected on support by axle, and dry-reed contact and support are fixed; Drive ball float to be movably connected on support by support bar, the inner surface of upper shell is provided with and the groove that drives ball float to be complementary; Rheostat is fixed on support, between rheostat and support bar, is provided with movable connecting rod; Rheostat is connected with the binding post I in terminal box I by wire.
Described groove is hemispherical.
Described binding post is connected with transmitter by binding post.
Described transmitter is, line outlet is set on terminal box II, signalization processor in terminal box II, and signal processor is connected with binding post II.
The utility model compared with prior art, has following effect:
At upper shell and ball float contact position, the groove be complementary with the ball float shape is set, utilizes buoyancy and lever principle, realize more accurately detecting of gas flow.Conversion by transmitter, possess international Buchholz relay function at present and realized that again relay air storage chamber gas flow converts the function of the signal of telecommunication 4-20mA or 0-5V to, but long-distance transmissions, can be by signal of telecommunication teletransmission to the electrical management network terminal, gas flow detection range 2-500ml, error is less than 3ml.And transmitter is located at outside, more adapt to environment for use, extended useful life.The present invention is convenient to running state of transformer is realized to the automatic intelligent management, is met the intelligent grid construction demand.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model structure of transmitter schematic diagram.
The relation curve schematic diagram that Fig. 3 is the utility model gas storage indoor gas variable quantity and output signal.
In figure, 1. upper shell; 2. lower house; 3. rheostat; 4. driving ball float; 5. air storage chamber; 6. dry-reed contact; 7. baffle plate; 8. terminal box I; 9. vent valve; 10. groove; 11. support; 12. terminal box II; 13. signal processor; 14. insulation board; 15. line outlet; 16. upper cover; Ml. gas flow, the mA. current signal.
Embodiment
With reference to accompanying drawing, in conjunction with specific embodiments, the utility model is elaborated as follows.
Embodiment
As shown in Figure 1-2, comprise upper shell 1, lower house 2, vent valve 9 and terminal box I 8 are arranged on the top of upper shell 1; Support 11 is arranged in lower house 2 inner chambers, and support 11 tops are fixed on upper shell 1, and baffle plate 7 is rotatably connected on support 11 by axle, and dry-reed contact 6 is fixing with support 11; Drive ball float 4 to be movably connected on support 11 by support bar, the inner surface of upper shell is provided with and the hemispherical groove 10 that drives ball float to be complementary; Rheostat 3 is fixed on support 11, between rheostat 3 and support bar, is provided with movable connecting rod; Rheostat 3 is connected with the binding post I in terminal box I 8 by wire; Binding post I is connected with the transmitter line outlet by binding post.Described transmitter is, the top of terminal box II 12 arranges upper cover 16, and the side of terminal box II 12 arranges line outlet 15, signalization processor 13 in terminal box II, signal processor 13 is connected with the binding post II on being arranged on insulation board 14, and binding post II is connected to line outlet 15 by wire.
Operation principle of the present invention is: interior during without gas when air storage chamber 5, and drive ball float 4 to drive rheostats 3 to arrive initial points, signal transmitting device output 4mA current signal or 0V voltage signal.Drive ball float radius R 19mm, volume is 28.71ml, hemispherical groove radius R 20mm, and volume is 16.74ml.When γ-ray emission 16.74-(33.49 ÷ 2)=2.39ml, ball float increases and starts to descend with gas, drives rheostat to rotate, and to the signal transmitting device, transmits air storage chamber gas variable quantity information.The signal transmitting device converts gas storage indoor gas variable quantity information to 4-20mA or 0-5V signal of telecommunication, and the relation curve of gas storage indoor gas variable quantity and output signal is shown in Fig. 3, and wherein abscissa represents gas flow, and ordinate represents current signal.
The above is specific embodiment of the utility model and the know-why used, and any equivalent transformation based on the technical solutions of the utility model basis, within all belonging to protection range of the present utility model.
Claims (4)
1. the transformer Buchholz relay, comprise upper shell, lower house, and support is arranged in lower housing cavity, and cantilever tip is fixed on upper shell, and baffle plate is rotatably connected on support by axle, and dry-reed contact and support are fixed; It is characterized in that driving ball float to be movably connected on support by support bar, the inner surface of upper shell is provided with and the groove that drives ball float to be complementary; Rheostat is fixed on support, between rheostat and support bar, is provided with movable connecting rod; Rheostat is connected with the binding post I in terminal box I by wire.
2. transformer Buchholz relay according to claim 1, is characterized in that described groove is hemispherical.
3. transformer Buchholz relay according to claim 1, is characterized in that described binding post I is connected with transmitter by binding post.
4. transformer Buchholz relay according to claim 3, is characterized in that described transmitter is, line outlet is set on terminal box II, signalization processor in terminal box II, and signal processor is connected with binding post II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203671348U CN203325798U (en) | 2013-06-25 | 2013-06-25 | Gas relay for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203671348U CN203325798U (en) | 2013-06-25 | 2013-06-25 | Gas relay for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203325798U true CN203325798U (en) | 2013-12-04 |
Family
ID=49665110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203671348U Expired - Lifetime CN203325798U (en) | 2013-06-25 | 2013-06-25 | Gas relay for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203325798U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715967A (en) * | 2015-03-30 | 2015-06-17 | 余姚市电力设备修造厂 | Switch cabinet with isolation switch |
| CN110729086A (en) * | 2019-08-26 | 2020-01-24 | 武汉船用机械有限责任公司 | Water resistor with adjustable resistance value |
-
2013
- 2013-06-25 CN CN2013203671348U patent/CN203325798U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715967A (en) * | 2015-03-30 | 2015-06-17 | 余姚市电力设备修造厂 | Switch cabinet with isolation switch |
| CN110729086A (en) * | 2019-08-26 | 2020-01-24 | 武汉船用机械有限责任公司 | Water resistor with adjustable resistance value |
| CN110729086B (en) * | 2019-08-26 | 2021-10-08 | 武汉船用机械有限责任公司 | Water resistor with adjustable resistance value |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |
|
| CX01 | Expiry of patent term |