CN203434076U - Heating device of SF6 circuit breaker - Google Patents
Heating device of SF6 circuit breaker Download PDFInfo
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- CN203434076U CN203434076U CN201320152395.8U CN201320152395U CN203434076U CN 203434076 U CN203434076 U CN 203434076U CN 201320152395 U CN201320152395 U CN 201320152395U CN 203434076 U CN203434076 U CN 203434076U
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- circuit breaker
- gas
- copper pipe
- operated valve
- electromagnetically operated
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Abstract
The utility model discloses a heating device of an SF6 circuit breaker. The heating device can effectively increase the temperature of gas inside SF6 gas chambers in SF6 circuit breaker pole posts. A circuit breaker body comprises three circuit breaker poles posts; the three circuit breaker pole posts respectively comprise an SF6 arc extinguish chamber therein; the SF6 arc extinguish chambers of the three circuit breaker pole posts are communicated with one another through a circuit breaker copper pipe; the circuit breaker copper pipe is provided with a three-way connector and also comprises a respiration-type gas heating device which is used for extracting and heating the gas in the SF6 arc extinguish chambers, and transferring the heated gas to the SF6 arc extinguish chambers; the three-way connector is communicated with a connector on the respiration-type gas heating device through a connecting copper pipe; the respiration-type gas heating device comprises a gas storage tank; the gas storage tank includes a top cover; the exterior of the gas storage tank is provided with a first pressure sensor, a connector, a second temperature sensor, and a second temperature sensor used for detecting ambient temperature; and a first electromagnetic valve, a gear pump, a first temperature sensor, an SF6 adsorbent, a heater, a fourth electromagnetic valve, a third electromagnetic valve and a second electromagnetic valve are arranged inside the gas storage tank.
Description
Technical field
The utility model relates to the protection mechanism of SF6 circuit breaker, is specifically related to the heating protecting device of SF6 circuit breaker.
Background technology
Sulphur hexafluoride (SF6) is a kind of colorless and odorless, there is no toxicity, and stable chemical performance, does not burn, and is at normal temperatures and pressures the material of gaseous state.The insulating capacity of SF6 gas is air, nitrogen 2.5 times, arc extinguishing ability is 100 times of air, and gas pressure is larger, insulation property are higher, pressure is when 0.29MPa, and its dielectric strength is just close with transformer oil, therefore, SF6, with its good insulation, arc extinction performance, is widely used in heavy current breaker.But SF6 circuit breaker can cannot work because of SF6 gas liquefaction when low temperature.SF6 is a kind of macromolecule gas, and liquefaction point is higher.At extremely frigid zones, when SF6 gas, because reducing, ambient temperature liquefies, and its pressure (density) also decreases, the dielectric strength of SF6 gas and the pressure correlation of gas, pressure decreased, insulation, arc extinguishing ability also reduce.When gas pressure reduces the locking pressure to circuit breaker, circuit breaker has to exit operation, when serious, can cause large-area power-cuts.As can be seen from Figure 1, rated pressure is 0.7MPa, and alarm pressure is 0.6MPa, locking pressure 0.55MPa, when ambient temperature is reduced to-26 ℃, circuit breaker will be because of SF6 gas liquefaction locking, if separating brake at this moment, the arc extinguishing ability of circuit breaker is very low, may cause circuit breaker accident.
Known by above-mentioned analysis, cause SF6 gas pressure to decline and the phenomenon of locking breaker control circuit, mainly by temperature, reduce and cause.The lowest temperature can reach the area of-30 ℃ in the winter time, will take into full account SF6 circuit breaker in service in the winter time, when ambient temperature reaches condensing temperature, occurs that SF6 gas pressure declines and the situation of locking breaker control circuit.
The problem existing in the application of cold area in north in order to solve SF6 circuit breaker (especially current porcelain knob type SF 6 circuit breaker), high-voltage switch gear manufacturing firm and power department have all been done a lot of trials, relatively common are at present two kinds of methods:
1. with SF6 mist, substitute SF6 gas, generally adopt the mist of SF6 and N2 as insulation and arc-extinguishing medium.Mixed proportion need to consider condensing temperature, insulation property, these 3 factors of arc extinction performance, common are 50%SF6+50%N2 and 60%SF6+40%N2.
2. in breaker body bottom, install heater additional, the power department of domestic extremely frigid zones, comprises some high-voltage switch gear producers, all once does such trial, at SF6 circuit breaker, in pillar lower end, installs electric heater additional, as shown in Figure 2:
Use mist to replace pure SF6 gas, although reduced the liquefaction point of gas, also to circuit breaker maintenance and maintenance, brought problem.For example the undesired reduction of circuit breaker pressure need to be hunted leak, no matter be that qualitative detection or quantitative detection all can make the susceptibility of leakage detecting instrument, accuracy be affected because of the variation of gas concentration, this is more obvious when " hanging bottle ", local wrapping, the leak detection of integral body button cover.Use mist to return detection SF6 gas water content and impact, even cause the wrong report erroneous judgement of transducer.Use the circuit breaker of mist and the density of SF6 gas, arc quenching chamber structure etc., also different with the circuit breaker of pure SF6 gas, therefore, inevitably to inspection and maintenance, bring problem.
Heater is installed in bottom at pole, although this heat protocol is simple, but its shortcoming is also apparent, longer dimension due to pole, about 1100mm, and mainly link is insulated tension pole, its material is hot non-conductor, therefore enough heats can not be transferred in SF6 air chamber.
Take LW36-126 circuit breaker as example, height overall 4680mm, wherein pole part height is about 2400mm, and SF6 arc control device, on the top of pole, wherein inject the about 10Kg of SF6 gas, and SF6 rated pressure is 0.7MPa, rated current 3150A.
Be below one group of heating-up temperature value (wherein 1-11 is divided into 11 sections from bottom to top by pole) of surveying at pole diverse location:
At pole bottom mounting heater, heat is transmitted in arc control device, through overtesting, find that this method does not prove effective, reason is connecting portion longer dimension, about 1100mm, and also main link is insulated tension pole, its material is hot non-conductor, therefore enough heats can not be transferred in SF6 air chamber, under extremely cold condition, the shortage of heat of conducting is to promote the temperature of SF6 gas indoor gas.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, and the heater that can effectively promote the interior gas temperature of SF6 air chamber in SF6 circuit breaker polar is provided.
The utility model solves the technical scheme that its technical problem adopts: a kind of heater of SF6 circuit breaker, breaker body comprises three circuit breaker polars, in three circuit breaker polars, all comprise SF6 arc control device, the SF6 arc control device of three circuit breaker polars are communicated with by circuit breaker copper pipe, on circuit breaker copper pipe, three-way connector is set, also comprise for heating after SF6 arc extinguishing indoor gas is extracted out, and after heating, send the type of respiration gas-heating apparatus of SF6 arc control device back to, connecting copper pipe is communicated with three-way connector with the connector on type of respiration gas-heating apparatus;
Further: above-mentioned type of respiration gas-heating apparatus, comprise air accumulator, air accumulator comprises top cover, air accumulator outer setting the first pressure sensor, connector, the second pressure sensor and for detection of the second temperature sensor of ambient temperature; Air accumulator inside arranges the first electromagnetically operated valve, gear pump, the first temperature sensor, SF6 adsorbent, heater, the 4th electromagnetically operated valve, the 3rd electromagnetically operated valve, the second electromagnetically operated valve;
The free end of connecting copper pipe is deep into air accumulator inside, is connected in series successively from front to back the second pressure sensor on connecting copper pipe, the first electromagnetically operated valve, gear pump, the 4th electromagnetically operated valve; On connecting copper pipe, the front end of the first electromagnetically operated valve and the rear end of gear pump are by copper pipe the 3rd electromagnetically operated valve in parallel; On connecting copper pipe, the rear end of the first electromagnetically operated valve also leads to one and has free-ended copper pipe, and the second electromagnetically operated valve is installed on this copper pipe.
Further: above-mentioned air accumulator inside is also filled with SF6 gas.
The utility model compared with prior art has the following advantages:
The utility model has adopted pump four valve type of respiration gas-heated principles, and heating effect is reliable; Its external hanging type air accumulator, when arc suppression chamber pressure is high, can, gas compression in air accumulator, when arc suppression chamber pressure reduces, can arrive arc control device gas make-up in air accumulator; Type of respiration gas-heating apparatus of the present utility model and SF6 circuit breaker only have a tie point, install easily; As long as suitably adjust heater power, even in extremely cold area, the method also can guarantee that circuit breaker normally moves; The utility model hangs over outward outside SF6 circuit breaker as annex, is not changing under the prerequisite of breaker structure and maintenance technology condition, reliably to system heating; The utility model is minimum to the change of this body structure of SF6 circuit breaker.
Accompanying drawing explanation
Fig. 1 is SF6 gas pressure curve;
Fig. 2 is a kind of structure of existing circuit breaker;
Fig. 3 is breaker structure of the present utility model;
Fig. 4 is the structural representation of the utility model heater.
?description of reference numerals:
1 is electric heater, and 2 is circuit breaker polar, and 3 is circuit breaker copper pipe, and 4 is three-way connector, 5 is connecting copper pipe, and 6 is the second pressure sensor, and 7 is the first electromagnetically operated valve, 8 is gear pump, and 9 is air accumulator, and 10 is the first temperature sensor, 11 is SF6 adsorbent, and 12 is heater, and 13 is the 4th electromagnetically operated valve, 14 is the 3rd electromagnetically operated valve, and 15 is the second electromagnetically operated valve, and 16 is the second temperature sensor, 17 is the first pressure sensor, and 18 is connector, and 19 is type of respiration gas-heating apparatus.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
As shown in Figure 3 and Figure 4, it shows a kind of embodiment of the present utility model, and the heater of the utility model SF6 circuit breaker, for circuit breaker has installed a set of type of respiration gas-heating apparatus 19 additional, for the SF6 gas of heatable fuser.This device is connected with the gas circuit of SF6 circuit breaker by a three-way connector 4, from three-way connector 4, is directly connected to type of respiration gas-heating apparatus 19;
The utility model can effectively prevent that SF6 gas from liquefying when low temperature:
Type of respiration gas-heating apparatus 19 is connected with the three-way connector 4 of installing on SF6 circuit breaker copper pipe 3 by connecting copper pipe 5 and connector 18; After connecting, opening power, closes four electromagnetically operated valves (the first electromagnetically operated valve 7, the second electromagnetically operated valve 15, the three electromagnetically operated valves 14 and the 4th electromagnetically operated valves 13), starts computer system, starts to detect the second temperature sensor 16;
If the second temperature sensor 16(is ambient temperature namely) reading during lower than minus 20 degrees, system starts; Close the second electromagnetically operated valve and the 3rd electromagnetically operated valve, open the first electromagnetically operated valve and the 4th electromagnetically operated valve, starter receiver pump 8, at this moment, in circuit breaker polar 2, the gas of SF6 arc control device (cold air) is pumped in air accumulator 9, when the reading of the second pressure sensor 6 stops during higher than 0.67MPa lower than 0.53MPa or when the pressure of the first pressure sensor 17;
Open heater 12, to gas-heated in air accumulator 9, more than the reading of the first temperature sensor 10 reaches 75 degree, stop heating;
Open the second electromagnetically operated valve and the 3rd electromagnetically operated valve, close the first electromagnetically operated valve and the 4th electromagnetically operated valve, starter receiver pump 8, at this moment in air accumulator, gas (hot gas) moves to the SF6 arc control device in circuit breaker polar 2, when the pressure of the second pressure sensor 6 higher than the pressure of 0.6MPa or the first pressure sensor 17 lower than 0.53MPa, stop;
Gas heat diffusion, pumped cold air to air accumulator from SF6 arc control device after 5 minutes in SF6 arc control device, and so forth, made more than the temperature of SF6 gas in SF6 arc control device remains on condensing temperature always;
When ambient temperature is spent higher than subzero 5, system-down.
The utility model can also prevent from reducing because SF6 reveals the pressure (density) causing:
When system detects the reading proximity sensing pressure of the second pressure sensor 6, during such as 0.53MPa, measures ambient temperature, if ambient temperature is not less than subzero 23 degree, can judge that leakage has occurred switch, at this moment system can be reported to the police to main control computer by 485 lines (data wire), and notifies person on duty by the form of note;
Open the second electromagnetically operated valve and the 3rd electromagnetically operated valve, starter receiver pump 8 stops when the second pressure sensor 6 reaches normal pressure;
Owing to containing the SF6 gas of about 5Kg in air accumulator, therefore, if reveal not seriously, can within a period of time, guarantee the safe operation of SF6 circuit breaker.
The utility model has adopted pump four valve type of respiration gas-heated principles, and heating effect is reliable; Its external hanging type air accumulator, when arc suppression chamber pressure is high, can, gas compression in air accumulator, when arc suppression chamber pressure reduces, can arrive arc control device gas make-up in air accumulator; Type of respiration gas-heating apparatus of the present utility model and SF6 circuit breaker only have a tie point, install easily; As long as suitably adjust heater power, even in extremely cold area, the method also can guarantee that circuit breaker normally moves; The utility model hangs over outward outside SF6 circuit breaker as annex, is not changing under the prerequisite of breaker structure and maintenance technology condition, reliably to system heating; The utility model is minimum to the change of this body structure of SF6 circuit breaker.
By reference to the accompanying drawings the utility model preferred implementation is explained in detail above, but the utility model is not limited to above-mentioned execution mode, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make a variety of changes.Do not depart from design of the present utility model and scope and can make many other changes and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.
Claims (3)
1. the heater of a SF6 circuit breaker, breaker body comprises three circuit breaker polars (2), in three circuit breaker polars (2), all comprise SF6 arc control device, the SF6 arc control device of three circuit breaker polars (2) are communicated with by circuit breaker copper pipe (3), three-way connector (4) is set on circuit breaker copper pipe (3), it is characterized in that: also comprise for heating after SF6 arc extinguishing indoor gas is extracted out, and after heating, send the type of respiration gas-heating apparatus (19) of SF6 arc control device back to, connecting copper pipe (5) is communicated with three-way connector (4) with the connector (18) on type of respiration gas-heating apparatus (19).
2. the heater of a kind of SF6 circuit breaker according to claim 1, it is characterized in that: described type of respiration gas-heating apparatus (19), comprise air accumulator (9), air accumulator (9) comprises top cover, air accumulator (9) outer setting the first pressure sensor (17), connector (18), the second pressure sensor (6) and for detection of second temperature sensor (16) of ambient temperature; Air accumulator (9) inside arranges the first electromagnetically operated valve (7), gear pump (8), the first temperature sensor (10), SF6 adsorbent (11), heater (12), the 4th electromagnetically operated valve (13), the 3rd electromagnetically operated valve (14), the second electromagnetically operated valve (15); The free end of connecting copper pipe (5) is deep into air accumulator (9) inside, and connecting copper pipe (5) is connected in series the second pressure sensor (6) from front to back successively, the first electromagnetically operated valve (7), gear pump (8), the 4th electromagnetically operated valve (13); Connecting copper pipe (4) is upper, and the rear end of the front end of the first electromagnetically operated valve (7) and gear pump (8) is by copper pipe the 3rd electromagnetically operated valve (14) in parallel; Connecting copper pipe (4) is upper, and the rear end of the first electromagnetically operated valve (7) also leads to one and has free-ended copper pipe, and the second electromagnetically operated valve (15) is installed on this copper pipe.
3. the heater of a kind of SF6 circuit breaker according to claim 1 and 2, is characterized in that: described air accumulator (9) inside is also filled with SF6 gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320152395.8U CN203434076U (en) | 2013-03-30 | 2013-03-30 | Heating device of SF6 circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320152395.8U CN203434076U (en) | 2013-03-30 | 2013-03-30 | Heating device of SF6 circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203434076U true CN203434076U (en) | 2014-02-12 |
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ID=50063100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320152395.8U Expired - Fee Related CN203434076U (en) | 2013-03-30 | 2013-03-30 | Heating device of SF6 circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203434076U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203161A (en) * | 2014-10-21 | 2015-12-30 | 上海乐研电气科技有限公司 | Internal temperature on-line monitoring method, device and system for SF6 high-voltage electrical equipment |
| RU2726858C1 (en) * | 2016-08-10 | 2020-07-16 | Абб Швайц Аг | Gas (sf6) insulation with thermal capacitor circuit breaker system |
| CN114597098A (en) * | 2022-03-31 | 2022-06-07 | 西安西电高压开关有限责任公司 | Column type circuit breaker with high-pressure heating |
-
2013
- 2013-03-30 CN CN201320152395.8U patent/CN203434076U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203161A (en) * | 2014-10-21 | 2015-12-30 | 上海乐研电气科技有限公司 | Internal temperature on-line monitoring method, device and system for SF6 high-voltage electrical equipment |
| CN105203161B (en) * | 2014-10-21 | 2018-05-15 | 上海乐研电气有限公司 | A kind of SF6High voltage electric equipment internal temperature on-line monitoring method, apparatus and system |
| RU2726858C1 (en) * | 2016-08-10 | 2020-07-16 | Абб Швайц Аг | Gas (sf6) insulation with thermal capacitor circuit breaker system |
| CN114597098A (en) * | 2022-03-31 | 2022-06-07 | 西安西电高压开关有限责任公司 | Column type circuit breaker with high-pressure heating |
| CN114597098B (en) * | 2022-03-31 | 2023-06-13 | 西安西电高压开关有限责任公司 | Column type circuit breaker with high-voltage heating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20200330 |
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| CF01 | Termination of patent right due to non-payment of annual fee |