CN201975338U - On-line monitoring gas relay - Google Patents
On-line monitoring gas relay Download PDFInfo
- Publication number
- CN201975338U CN201975338U CN2011200778132U CN201120077813U CN201975338U CN 201975338 U CN201975338 U CN 201975338U CN 2011200778132 U CN2011200778132 U CN 2011200778132U CN 201120077813 U CN201120077813 U CN 201120077813U CN 201975338 U CN201975338 U CN 201975338U
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- China
- Prior art keywords
- line monitoring
- ball float
- gas
- fulcrum
- buchholz relay
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model belongs to the field of transformer protection and particularly relates to an on-line monitoring gas relay. The existing gas relay can send an alarm signal only after operating when gas is sufficient, but cannot carry out on-line monitoring on the generated gas. The on-line monitoring gas relay comprises a shell, a release valve and a float ball and is characterized in that a fulcrum is arranged in the shell; the fulcrum is provided with a conductive lever; the conductive lever is rotationally connected with the fulcrum; one end of the conductive lever is connected with the float ball and the other end of the conductive lever is contacted and connected with nodes on a multinode disk; the nodes on the multinode disk are respectively connected with lead wires which are arranged in parallel; equivalent resistors are connected between adjacent lead wires; and the resistor at the tail end is connected with the fulcrum through a return conductor. Due to the adoption of the on-line monitoring gas relay, the on-line monitoring of gas volume in gas can be realized.
Description
Technical field
The utility model belongs to transformer explosion-protection equipment field, is specifically related to a kind of on-line monitoring Buchholz relay.
Background technology
Power transformer is the great equipment of operation power, costs an arm and a leg.The online protection of transformer is particularly important.Buchholz relay is of paramount importance first protection of transformer, and Buchholz relay is installed on the pipeline between transformer and the conservator, fills with insulating oil when transformer normally moves.The Buchholz relay of prior art comprises that housing, vent valve, housing the inside are provided with light gas and heavy gas, light gas is made of top ball float and light gas tongue tube, the top ball float is connected with magnet, the top is provided with light gas dry reed switch, heavy gas comprises that bottom ball float, stream oil baffle and heavy gas tongue tube, baffle plate are rotatably connected with fixing point, and the bottom ball float is connected with magnet.
When producing gas in the transformer, to conservator, gas at first concentrates in first chamber of Buchholz relay by pipeline in the gas rising.Simultaneously, oil level descends, and the top ball float drives magnet and is moved to the light gas tongue tube in top, and alarm signal is sent in light gas tongue tube action.When important electrical breakdown accident takes place in transformer, will produce in inside and continue or interrupted arc burning insulating oil, (particularly turn-to-turn short circuit produces the rapid imflammable gas of sending out etc.) methane gas will continue to produce, the bottom ball float will start heavy gas tongue tube simultaneously, the action of heavy gas often is accompanied by flowing of oil, and oil stream plate washer and bottom ball float have relevant action.The action of oil stream plate washer can make heavy gas tongue tube move by displacement magnet equally.Heavy gas dry-reed tube switch action is commonly used to be connected to trip breaker, thereby transformer and electrical network are disconnected, and is out of service.Rise up into Buchholz relay on the gas by oil decomposition when light gas mainly is reflected in operation or minor failure, air pressure descends pasta, the ball float of relay falls with pasta, when magnet is moved to light gas tongue tube, contacting sends alarm signal, and light gas action does not mean that transformer necessarily has problem.Fortune inspection personnel can emit sampling with gas by the vent valve of Buchholz relay; After analyzing, the composition that can move by gas determines whether that transformer needs interruption maintenance.The action of heavy gas has reflected that necessarily great fault has appearred in transformer.
The light gas of existing Buchholz relay all is when waiting gas abundant, usually (250ml～just can move when 350ml) displacement of first ball float drives magnet to tongue tube.If be gas at the beginning by discharge generation, usually can the big fault of very fast initiation, as partial short-circuit etc.
If after the light gas action of relay, take measures, probably when light gas tongue tube did not move, important accident had just taken place and has directly caused heavy gas action in transformer again.With existing product in the world, the generation that we can't the on-line monitoring minimum gas at present.Can not how much carry out the on-line continuous monitoring to producing gas, the transformer of normal operation does not have gas to produce, if partial discharge is enough serious, the generation that we again can the early detection pernicious gas just can be avoided great Accident of Transformer effectively.
The utility model content
In order to overcome the shortcoming of prior art, the purpose of this utility model provides a kind of on-line monitoring Buchholz relay, can not carry out the gas on-line monitoring to solve the prior art Buchholz relay, can not carry out the problem of real-time guard to transformer.
To achieve these goals, the technical solution adopted in the utility model is: the explosion-proof Buchholz relay of a kind of on-line monitoring, comprise housing, vent valve, ball float and heavy gas, it is characterized in that: be provided with a fulcrum in the housing, fulcrum is provided with a conduction lever, described conduction lever and fulcrum are rotationally connected, described conduction lever one end is connected with ball float, and the node contact that the other end is connected with the multinode dish connects, and the node on the multinode dish is connected with the lead that be arranged in parallel respectively, be connected with equivalent resistance between the adjacent wires, and connect by return wire between terminal resistance and the fulcrum.
Be provided with balancing weight below the above-mentioned ball float, described balancing weight is hinged with the conduction lever with ball float respectively.
The averag density of above-mentioned ball float equals the density of oil, is provided with one and the connecting rod that equates of oil density then in the bottom of ball float, and described connecting rod is hinged with the conduction lever with ball float respectively.
Be in series with the TC10-R current converter on the above-mentioned wire loop.
The number of lead wires of above-mentioned multinode dish is 25-35;
The resistance of the resistance of above-mentioned equivalence is 5 ohm or 10 ohm.
Above-mentioned conduction lever is positioned at the flexible silver tipped contact of end rivet welding of multinode dish one side.
Lead in the above-mentioned loop is two or three parallel connections.
Distance between above-mentioned fulcrum and the ball float is greater than the distance of fulcrum and multinode dish.Measure sensitiveer.
Description of drawings
Fig. 1 is the prior art constructions schematic diagram,
Fig. 2 is a structural representation of the present utility model,
Fig. 3 is the partial schematic diagram of a kind of embodiment,
Fig. 4 is the partial schematic diagram of another embodiment,
Wherein, 1-housing, 2-vent valve, 3-top ball float, 4-magnet, the light gas tongue tube of 5-, 6-mercury node, 7-bottom ball float, the heavy gas dry-reed contact of 8-, 9-magnet, 10-flows oil baffle, 11-fulcrum, 12-conducts electricity lever, 13-multinode dish, 14-lead, 15-resistance, 16-return wire, 17-balancing weight, the 18-current converter, 19-connecting rod, 20-connecting plate.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Referring to Fig. 1, a kind of Buchholz relay of the prior art, the Buchholz relay of prior art comprises that housing 1, vent valve 2, housing 1 the inside are provided with light gas and heavy gas, light gas is made of top ball float 3 and light gas tongue tube 5, top ball float 3 is connected with magnet 4, be provided with mercury contact 6 above the magnet 4, heavy gas comprises that bottom ball float 7, stream oil baffle 10 and heavy gas tongue tube 8, stream oil baffle 10 are rotatably connected with fixing point, and bottom ball float 7 is connected with magnet 9.
When being created in normal operation in the transformer, be full of oil in the relay, top ball float 3 is immersed in the oil, is in the come-up position, and light gas tongue tube 5 disconnects; 10 of oil baffles of stream since weight own and sagging, heavy gas tongue tube 8 also disconnects.When producing gas in the transformer, to conservator, gas at first concentrates in first chamber of Buchholz relay by pipeline in the gas rising.Simultaneously, oil level descends, and top ball float 3 drives magnet 4 and is moved to light gas tongue tube 5, and alarm signal is sent in light gas tongue tube 5 actions.When important electrical breakdown accident takes place in transformer, will produce in inside and continue or interrupted arc burning insulating oil, (particularly turn-to-turn short circuit produces the rapid imflammable gas of sending out etc.) methane gas will continue to produce, bottom ball float 7 will start heavy gas tongue tube 8 simultaneously, the action of heavy gas often is accompanied by flowing of oil, and oil stream plate washer 10 and bottom ball float 7 have relevant action.The action of oil stream plate washer 10 can make heavy gas tongue tube 8 move by displacement magnet 9 equally.Heavy gas tongue tube 8 actions are commonly used to be connected to trip breaker, thereby transformer and electrical network are disconnected, and are out of service.Rise up into Buchholz relay on the gas by oil decomposition when light gas mainly is reflected in operation or minor failure, air pressure descends pasta, the ball float of relay falls with pasta, and light gas dry-reed contact is connected and sent alarm signal, and light gas action does not mean that transformer necessarily has problem.Fortune inspection personnel can emit sampling with gas by the vent valve of Buchholz relay; After analyzing, the composition that can move by gas determines whether that transformer needs interruption maintenance.The action of heavy gas has reflected that necessarily great fault has appearred in transformer.
But the light gas of above-mentioned Buchholz relay all is when waiting gas abundant, usually (250ml～just can move when 350ml) displacement of top ball float drives magnet to tongue tube.If be gas at the beginning by discharge generation, usually can the big fault of very fast initiation, as partial short-circuit etc.If after the action of the light gas of relay, take measures, probably when light gas tongue tube 5 did not move, important accident had just taken place and has directly caused heavy gas action in transformer again, generation that can't the on-line monitoring minimum gas.Can not how much carry out the on-line continuous monitoring to producing gas.
Referring to Fig. 2, the explosion-proof Buchholz relay of a kind of on-line monitoring of the present utility model, the explosion-proof Buchholz relay of a kind of on-line monitoring, comprise housing 1, vent valve 2, ball float 3 and heavy gas, be provided with a fulcrum 11 in the housing 1, fulcrum 11 is provided with a conduction lever 12, and described conduction lever 12 and fulcrum 11 are rotationally connected, and described conduction lever 12 1 ends are connected with ball float 3, node contact on the other end and the multinode dish 13 is connected, the node of multinode dish 13 is connected with the lead 14 that be arranged in parallel respectively, is connected with equivalent resistance 15 between the adjacent wires 14, and connects by return wire 16 between terminal resistance 15 and the fulcrum 11.Lead 14 numbers that described multinode dish 13 connects are 25-35, and the value of the resistance 15 of described equivalence is 5 ohm or 10 ohm.
Referring to Fig. 3 and Fig. 4, described loop return wire 16 is two parallel connections, is connected with TC10-R current converter 18.Two lead parallel connections can reduce the electric current that return wire produces greatly, can make measurement more accurate.Whole multinode dish 13 and lead 14 are arranged on above the connecting plate 20, and the inwall of connecting plate and Buchholz relay is fixedlyed connected.Be provided with balancing weight 17 below the ball float 3, described balancing weight 17 is hinged with conduction lever 12 with ball float 3 respectively, perhaps the averag density of ball float 3 equals the density of oil, be provided with one and the connecting rod 19 that equates of oil density then in the bottom of ball float 3, described connecting rod 19 is hinged with the conduction lever with ball float 3 respectively.The purpose that balancing weight is set is that the averag density of ball float 3 is equated with the density of oil, the top of ball float does not contact with inwall on the Buchholz relay when having gas in the relay like this, if there is gas to produce, when liquid level descends, the top of ball float also can be equal with oil level all the time, can reduce error like this, the error when ball float descends when especially opening most.Because ball float density is during less than the density of oil, gas need produce that ball float just can descend when a certain amount of, so do not detect changes in resistance this moment.
The course of work:
The utility model when ball float along with pasta during to bottom offset, contact will change resistance value, thus the resistance value of this variable just corresponding the variation of gas.This resistance is connected to transmitter, and transmitter will be exported variable 4-20mA electric current and give distant place computer, and computer just can monitor the generation of gas at any time by the variation of electric current.This utility model can be implemented continuous on-line monitoring to the gas flow that produces in the Buchholz relay.
Claims (8)
1. on-line monitoring Buchholz relay, comprise housing (1), vent valve (2), ball float (3) and heavy gas, it is characterized in that: be provided with a fulcrum (11) in the housing (1), fulcrum (11) is provided with a conduction lever (12), described conduction lever (12) and fulcrum (11) are rotationally connected, described conduction lever (12) one ends are connected with ball float (3), on the other end and the multinode dish (13) the node contact be connected, node on the multinode dish (13) is connected with the lead (14) that be arranged in parallel respectively, be connected with equivalent resistance (15) between the adjacent wires (14), and connect by return wire (16) between terminal resistance and the fulcrum (11).
2. a kind of on-line monitoring Buchholz relay according to claim 1 is characterized in that: be provided with balancing weight (17) below the described ball float (3), described balancing weight (17) respectively and ball float (3) with the conduction lever (12) hinged.
3. a kind of on-line monitoring Buchholz relay according to claim 1, it is characterized in that: the averag density of described ball float (3) equals the density of oil, be provided with the connecting rod (19) that equates with oil density then in the bottom of ball float (3), described connecting rod (19) respectively and ball float (3) hinged with conduction lever (12).
4. according to the arbitrary described a kind of on-line monitoring Buchholz relay of claim 1-3, it is characterized in that: be in series with TC10-R current converter (18) on the described wire loop.
5. a kind of on-line monitoring Buchholz relay according to claim 4 is characterized in that: lead (14) number of described multinode dish (13) is 25-35, and the resistance of the resistance of described equivalence (15) is 5 ohm or 10 ohm.
6. a kind of on-line monitoring Buchholz relay according to claim 5 is characterized in that: described above-mentioned conduction lever (12) is positioned at the flexible silver tipped contact of end rivet welding of multinode dish (13) one sides.
7. a kind of on-line monitoring Buchholz relay according to claim 6 is characterized in that: described return wire (16) is two or three parallel connections.
8. a kind of on-line monitoring Buchholz relay according to claim 7 is characterized in that: the distance between described fulcrum (11) and the ball float (3) is greater than the distance of fulcrum (11) and multinode dish (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200778132U CN201975338U (en) | 2011-03-23 | 2011-03-23 | On-line monitoring gas relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200778132U CN201975338U (en) | 2011-03-23 | 2011-03-23 | On-line monitoring gas relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201975338U true CN201975338U (en) | 2011-09-14 |
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ID=44580436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200778132U Expired - Lifetime CN201975338U (en) | 2011-03-23 | 2011-03-23 | On-line monitoring gas relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201975338U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157299A (en) * | 2011-03-23 | 2011-08-17 | 刘畅 | Online monitoring gas relay |
| CN103512637A (en) * | 2012-06-18 | 2014-01-15 | 罗伯特·博世有限公司 | Liquid level measurement device |
| CN104862731A (en) * | 2015-06-07 | 2015-08-26 | 韩建农 | Indoor integrated device for hydrogen energy production |
-
2011
- 2011-03-23 CN CN2011200778132U patent/CN201975338U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157299A (en) * | 2011-03-23 | 2011-08-17 | 刘畅 | Online monitoring gas relay |
| CN102157299B (en) * | 2011-03-23 | 2013-02-27 | 刘畅 | Online monitoring gas relay |
| CN103512637A (en) * | 2012-06-18 | 2014-01-15 | 罗伯特·博世有限公司 | Liquid level measurement device |
| CN104862731A (en) * | 2015-06-07 | 2015-08-26 | 韩建农 | Indoor integrated device for hydrogen energy production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110914 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |