CN203150461U - Sulfur hexafluoride high-voltage circuit breaker for cold regions - Google Patents
Sulfur hexafluoride high-voltage circuit breaker for cold regions Download PDFInfo
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- CN203150461U CN203150461U CN2013200313331U CN201320031333U CN203150461U CN 203150461 U CN203150461 U CN 203150461U CN 2013200313331 U CN2013200313331 U CN 2013200313331U CN 201320031333 U CN201320031333 U CN 201320031333U CN 203150461 U CN203150461 U CN 203150461U
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Abstract
The utility model relates to a sulfur hexafluoride high-voltage circuit breaker. A sulfur hexafluoride high-voltage circuit breaker for cold regions comprises a high-voltage circuit breaker device body, wherein a sulfur hexafluoride gas chamber, a density relay and a transmission mechanism are arranged inside the device body, and the sulfur hexafluoride gas chamber is filled with sulfur hexafluoride gas. The high-voltage circuit breaker further comprises a sulfur hexafluoride gas liquefying prevention device which includes a gas storage tank filled with sulfur hexafluoride gas and a connecting pipe, wherein one end of the connecting pipe is connected to a gas supply port or a special connecting port of the high-voltage circuit breaker body in a sealed mode, the other end of the connecting pipe is connected to the gas storage tank to enable the inside of the gas storage tank and the sulfur hexafluoride gas chamber to be mutually communicated, and a thermal insulation layer is arranged outside the gas storage tank. According to the utility model, sulfur hexafluoride gas can be prevented from liquefying or liquefying excessively, and safe operation of the sulfur hexafluoride high-voltage circuit breaker in cold weather can be guaranteed.
Description
Technical field
The utility model relates to high-voltage electrical equipment, relates in particular to SF 6 high-voltage circuit breaker.
Background technology
Because sulfur hexafluoride gas has excellent insulation and arc extinction performance, is insulation and arc-extinguishing medium desirable in the primary cut-out, at home and abroad is used widely.The excellent properties of sulfur hexafluoride gas is realized under certain density and pressure, when temperature drops to a certain degree, liquefaction phenomenon will appear in the sulfur hexafluoride gas of primary cut-out inside, and its condensing temperature is relevant with density and pressure, density is more big, and condensing temperature is more high.Because the inner sulfur hexafluoride gas liquefaction of primary cut-out, portion gas becomes liquid, the density of sulfur hexafluoride gas and pressure will reduce gradually, thereby can cause the insulation property of primary cut-out and connecting-disconnecting function to descend, and have a strong impact on the reliability service of primary cut-out.
The outdoor primary cut-out scope of application is big, can be higher than 45 degree areas at latitude uses, such as in Xinjiang of China, the Inner Mongol, Ji Bei and the Northeast, winter climate cold, outdoor temperature reaches-40 ℃,-50 ℃ of some areas even arrival, sulfur hexafluoride breaker can be because of sulfur hexafluoride gas liquefaction under this temperature, and gas pressure is reduced to the locking force value, and sulfur hexafluoride breaker can't operate as normal, have to withdraw from operation, can cause large-area power-cuts when serious.
Be to solve the problem of SF 6 high-voltage circuit breaker reliability service under ultralow temperature, about producer and research institute (institute) have carried out big quantitative analysis and test to this, obtained following several solution, but all undesirable, specifically have:
1, adopts mist (sulphur hexafluoride/N
2; Sulphur hexafluoride/CF4 etc.) as arc extinguishing, dielectric, its shortcoming is: the capacity of power of cut-offfing for primary cut-out has only originally about 80%, and manufacturing technology is had relatively high expectations the cost costliness; The ratio mixed method of mist needs reasonable proportioning, otherwise the insulation characterisitic of mist and arc quenching characteristic will seriously undermine, simultaneously in case gas leakage, but because the gas of two kinds of high pressures mixes, its leak rate difference, make-up gas technology is very numerous and diverse, does not reach the product technology requirement, brought many inconvenience for use, detection, the management of this product, therefore can not be promoted.
2, adopt reduction sulphur hexafluoride air pressure to reach the sulfur hexafluoride gas liquefaction point and reduce, but because gas pressure reduces, and gas density is also reduction thereupon, cause the arc extinction performance of primary cut-out and insulation property to reduce.Directly influence the drop-out current ability of primary cut-out, do not satisfy the requirement that needs normally cut-off the capacity user, product is used be subjected to great limitation.
3, adopt the technology that the sulfur hexafluoride gas in the SF 6 high-voltage circuit breaker is directly heated.Adopt direct-fired method to improve the sulfur hexafluoride gas temperature of SF 6 high-voltage circuit breaker inside, prevent sulfur hexafluoride gas liquefaction.Present prior art, to the pot type sulfur hexafluoride breaker, be that (as patent ZL201020224456.3 (CN201796803U)) installs electric heater unit additional in the mouth pulling out of offering of the tank body outside (as patent ZL200820150430.1 (CN201242969Y)) or tank body, for improving the efficiency of heating surface, need install heat-insulation layer and overcoat additional in the heat tape outside.The shortcoming of the method is: because the sulfur hexafluoride gas of pot type sulfur hexafluoride breaker is fine being sealed in the tank body, to heat it, can only lean on heat exchange pattern to conduct heat, complex structure, the heat efficiency is low, simultaneously owing to directly heating, and also can be to the sealing ring accelerated ageing of pot type sulfur hexafluoride breaker, cause gas leakage, bring serious safety problem; And for the porcelain knob sulfur hexafluoride breaker, high-voltage switch gear manufactory has taked following measures at present: namely in primary cut-out sulfur hexafluoride air cell inside or the outer setting heater, and controlled automatically by intelligent temperature controller, when ambient temperature is reduced to uniform temperature when following, thermostat is connected heater power source sulfur hexafluoride air cell is heated, and the sulfur hexafluoride air cell temperature is remained at more than the uniform temperature.These measures, very undesirable for the result of use of outdoor porcelain knob breaker, because if heater is placed on sulfur hexafluoride air cell inside, almost be to change in case heater damages, so this method seldom adopts.And if heater is placed on the sulfur hexafluoride air cell outside, present technology, or heating poor effect or are brought other serious problems, as make the sealing ring quick aging, cause the gas leakage problem.The technology that adopts as patent ZL200610152005.1 (CN1925084A) is exactly to be provided with heater in the strut porcelain bushing lower end of every phase porcelain knob of porcelain knob sulfur hexafluoride breaker, when temperature is low, heater, because the gas of porcelain knob sulfur hexafluoride breaker is sealed in the porcelain knob, porcelain knob is a kind of heat-insulating material, in order to be effective, select very big heater for use, do not allow the sulfur hexafluoride gas of porcelain knob sulfur hexafluoride breaker liquefy though reached like this, because strut porcelain bushing lower end temperature is very high, cause the sealing ring quick aging of strut porcelain bushing lower end, long just inefficacy of time causes gas leakage.Also have, adopt being provided with heater, ZL201120025943.1 (CN202013833U) in the primary cut-out bottom base panel as patent ZL200620086633.X (CN2927307Y) and to adopt a kind of heat tracing overcoat to be wrapped in way outside the crossbeam of the operating mechanism case of primary cut-out and transmission case, because the gas of sulfur hexafluoride breaker is sealed in the porcelain knob, porcelain knob is a kind of heat-insulating material, it is bad that it adds thermal effect, can not deal with problems at all.
The technology that employing is directly heated the sulfur hexafluoride gas of primary cut-out, very simple on the principle, but it is very difficult that present technology implements, because the sulfur hexafluoride gas of primary cut-out is sealed in the sulfur hexafluoride air cell in the primary cut-out body, the voltage that adds primary cut-out is very high, generally is difficult to directly sulfur hexafluoride air cell be heated.Like this its to add thermal effect also be not very desirable, perhaps bring similarly to allow the sealing ring quick aging and cause the serious problems of gas leakage.
In sum, current SF 6 high-voltage circuit breaker exists the problem that sulfur hexafluoride gas liquefies in the cold district operation, brings hidden danger for the safe operation of electrical network.
Summary of the invention
In order to solve the problems referred to above that the SF 6 high-voltage circuit breaker prior art exists, the purpose of this utility model is to provide a kind of SF 6 high-voltage circuit breaker that is applied in cold district, it has the advantage that can not liquefy at its sulfur hexafluoride gas of extremely cold area, for huge effect is played in the safe operation that ensures electric power.
The utility model is achieved in that a kind of SF 6 high-voltage circuit breaker for cold district, the apparatus body that comprises primary cut-out, be provided with sulfur hexafluoride air cell in the apparatus body, transmission mechanism, sulfur hexafluoride gas density relay, described sulfur hexafluoride air cell is filled with sulfur hexafluoride gas, described primary cut-out also comprises and prevents the sulfur hexafluoride gas liquefying plant, this prevents that the sulfur hexafluoride gas liquefying plant from comprising air accumulator and the tube connector that is filled with sulfur hexafluoride gas, one end of described tube connector is sealedly connected on the gas supplementing opening or special-purpose connector of primary cut-out body, and the other end is connected on the air accumulator so that air accumulator is inner and sulfur hexafluoride air cell is interconnected.
Described a kind of SF 6 high-voltage circuit breaker for cold district, it also further comprises heater, this heater and described air accumulator are set together.
Described a kind of SF 6 high-voltage circuit breaker for cold district, it also comprises the heating intelligence controlling device, and this heating intelligence controlling device is monitored in the described air accumulator and/or temperature and gas density and ambient temperature and control connection heater in the sulfur hexafluoride air cell.
Described a kind of SF 6 high-voltage circuit breaker for cold district, described heating intelligence controlling device also has heating element breaking alarming circuit.
Described a kind of SF 6 high-voltage circuit breaker for cold district, the described sulfur hexafluoride gas liquefying plant that prevents also is provided with sulfur hexafluoride density relay or density meter or pressure switch, monitors density and the pressure of the sulfur hexafluoride gas of described air accumulator inside.
Described a kind of SF 6 high-voltage circuit breaker for cold district, the described sulfur hexafluoride gas liquefying plant that prevents also is provided with muff outward.
Described a kind of SF 6 high-voltage circuit breaker for cold district, described air accumulator is welded by steel or steel cylinder is made.
Described a kind of SF 6 high-voltage circuit breaker for cold district describedly prevents from also being provided with on the sulfur hexafluoride gas liquefying plant valve.
Described a kind of SF 6 high-voltage circuit breaker for cold district, the outside of described tube connector is provided with heat insulation layer.
Described a kind of SF 6 high-voltage circuit breaker for cold district, described air accumulator and heater outside are provided with heat insulation layer.
Remarks: described SF 6 high-voltage circuit breaker comprises electric equipments such as SF 6 high-voltage porcelain knob breaker, SF 6 high-voltage potting breaker, sulphur hexafluoride GIS, sulfur hexafluoride current mutual inductor, sulphur hexafluoride voltage transformer, sulphur hexafluoride transformer.In addition, the sulphur hexafluoride auxiliary gas tank can also be formed by other Metal Material Welding, or other material seal is made.
Description of drawings
Fig. 1 is a kind of SF 6 high-voltage circuit breaker outline drawing of the present utility model;
Fig. 2 is the structural representation that prevents the sulfur hexafluoride gas liquefying plant of a kind of SF 6 high-voltage circuit breaker of the present utility model;
Fig. 3 is a kind of SF 6 high-voltage circuit breaker outline drawing of the present utility model;
Fig. 4 is the structural representation that prevents the sulfur hexafluoride gas liquefying plant of a kind of SF 6 high-voltage circuit breaker of the present utility model;
Fig. 5 is the control schematic diagram of the heater that prevents the sulfur hexafluoride gas liquefying plant of a kind of SF 6 high-voltage circuit breaker of the utility model;
Fig. 6 is another kind of SF 6 high-voltage circuit breaker outline drawing of the present utility model;
Fig. 7 is the structural representation that prevents the sulfur hexafluoride gas liquefying plant of another kind of SF 6 high-voltage circuit breaker of the present utility model;
Fig. 8 is the control schematic diagram of the heater that prevents the sulfur hexafluoride gas liquefying plant of the another kind of SF 6 high-voltage circuit breaker of the utility model.
Embodiment
In order to understand the technical solution of the utility model better, also by reference to the accompanying drawings the utility model is described in detail below by specific embodiment:
See also Fig. 1, Fig. 2, first kind of SF 6 high-voltage circuit breaker of the present utility model comprises primary cut-out body 11, is arranged on the intrinsic sulfur hexafluoride air cell 12 of primary cut-out, density monitor 13, transmission mechanism 15, prevents the sulfur hexafluoride gas liquefying plant.Prevent that the sulfur hexafluoride gas liquefying plant from comprising compositions such as sulphur hexafluoride air accumulator 1, tube connector 2, heat insulation layer 4, housing 5, valve 6, joint 7, heat insulation layer 8.Prevent that wherein the sulfur hexafluoride gas liquefying plant is installed in by the primary cut-out, one end of tube connector 2 is sealedly connected on the gas supplementing opening 9 or special-purpose connector of primary cut-out body, and the other end is connected on the gas outlet of valve 6, the air inlet of valve 6 is connected on the sulphur hexafluoride air accumulator 1, also be connected with joint 7 on the sulphur hexafluoride air accumulator 1 simultaneously, as purposes such as tonifying Qi.The good heat insulation layer of heat insulation effect 4 is equipped with in the outside of sulphur hexafluoride air accumulator 1.Sulphur hexafluoride air accumulator 1, heat insulation layer 4, valve 6, joint 7 etc. all are installed in the housing 5 that prevents the sulfur hexafluoride gas liquefying plant.After installing, the sulphur hexafluoride making-up air device is connected with joint 7, sulphur hexafluoride air accumulator 1 is vacuumized, fill high pure nitrogen, fill sulfur hexafluoride gas again, till the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 approximately is charged to the rated pressure of SF 6 high-voltage circuit breaker.
When cold season, when temperature decline is very low, open valve 6.When opening valve 6, the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 just is connected with the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out.Because the insulation effect of heat insulation layer 4 is arranged, and the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 inside well is incubated.Because the sulphur hexafluoride air accumulator is filled with sulfur hexafluoride gas, is connected with the sulfur hexafluoride gas of sulfur hexafluoride air cell, its sulfur hexafluoride gas total amount is just many like this, and liquefaction has a process, and it needs the time, needs to absorb energy.And the gas of sulphur hexafluoride air accumulator is owing to there is a good insulation effect, and it is slow that its temperature reduces, and it is also slow to liquefy, temperature is also high, its gas makes the density of sulfur hexafluoride air cell delay to descend with regard to the sulfur hexafluoride air cell of supply primary cut-out, can not occur reporting to the police or latch-up phenomenon.Give an example and help illustrate this problem, in winter, be placed on the field if we only put little water on face, got up just to find to build-up ice entirely in second day; Coexist winter, if we pile water at face and are placed on the field, got up just to find in second day face above build-up ice, also have a lot of water below.So it is big to work as the total capacity of sulfur hexafluoride gas, its density descends just slow, and one day temperature is the fluctuation variation, when minimum point temperature, does not have false alarm, just can guarantee reliably working.And just raise when temperature, stopping to continue down to have liquefied, pressure maintains rated pressure, and this moment, gas density relay can false alarm yet so, and primary cut-out still can reliably working.
At extremely frigid zones, prevent that the sulfur hexafluoride gas liquefying plant can be provided with muff again, muff covers the air accumulator outer surface, in the muff thermal source can be arranged, high-temperature gas or hot water as sealing, the temperature of further raising and stable air accumulator, make the more sulfur hexafluoride air cells to the supply primary cut-out of gas of air accumulator, simultaneously the heat of air accumulator is delivered to the sulfur hexafluoride air cell of primary cut-out, guarantee temperature and the density of the sulfur hexafluoride air cell gas of primary cut-out, make its density be not less than alarming value, ensure the primary cut-out reliably working.
See also Fig. 3, Fig. 4, Fig. 5, second kind of SF 6 high-voltage circuit breaker of the present utility model comprises primary cut-out body 11, is arranged on the intrinsic sulfur hexafluoride air cell 12 of primary cut-out, density monitor 13, transmission mechanism 15, prevents the sulfur hexafluoride gas liquefying plant.Prevent that the sulfur hexafluoride gas liquefying plant from comprising compositions such as sulphur hexafluoride air accumulator 1, tube connector 2, heater 3, heat insulation layer 4, housing 5, valve 6, joint 7, heat insulation layer 8.And heater 3 mainly is made up of heating element 31, switch 32, controller 33, temperature sensor 34, temperature sensor 35, Based Intelligent Control element 36, pressure sensor 37 etc.Prevent that wherein the sulfur hexafluoride gas liquefying plant is installed in by the primary cut-out, one end of tube connector 2 is sealedly connected on the gas supplementing opening 9 or special-purpose connector of primary cut-out body, and the other end is connected on the gas outlet of valve 6, the air inlet of valve 6 is connected on the sulphur hexafluoride air accumulator 1, also be connected with joint 7 on the sulphur hexafluoride air accumulator 1 simultaneously, as purposes such as tonifying Qi.Heating element 31 is equipped with in the outside of sulphur hexafluoride air accumulator 1, and the good heat insulation layer of heat insulation effect 4 is equipped with in the outside of heating element 31.Sulphur hexafluoride air accumulator 1, heating element 31, switch 32, controller 33, Based Intelligent Control element 36, pressure sensor 37, heat insulation layer 4, valve 6, joint 7 etc. all are installed in the housing 5 that prevents the sulfur hexafluoride gas liquefying plant.Temperature sensor 34 is installed on the sulphur hexafluoride air accumulator 1, and temperature sensor 35 is installed in the outside of housing 5, can measure outdoor temperature.After installing, the sulphur hexafluoride making-up air device is connected with joint 7, sulphur hexafluoride air accumulator 1 is vacuumized, fill high pure nitrogen, fill sulfur hexafluoride gas again, till the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 approximately is charged to the rated pressure of SF 6 high-voltage circuit breaker.
When cold season, when temperature decline is very low, open valve 6, open heater 3.When opening valve 6, the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 just is connected with the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out.Detect atmospheric temperature by temperature sensor 35, when atmospheric temperature drops to preset value, Based Intelligent Control element 36 just starts controller 33, and controller 33 is opened heating element 31, and heating element 31 just begins to sulphur hexafluoride air accumulator 1 and inner sulfur hexafluoride gas heating.Because the insulation effect of heat insulation layer 4 is arranged, the temperature of the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 inside obtains raising very soon, and the temperature of the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out is very low, and there is the temperature difference in the sulfur hexafluoride gas at two places.Because the different temperature of two place's sulfur hexafluoride gas causes causing the density contrast of system, cause convection current.And convection current is conducted because involve dynamic process, thus than directly conduction is rapid, so heat transfer rate is fast, the efficient height, effective.Like this, the sulfur hexafluoride gas of the sulfur hexafluoride gas of air accumulator 1 and sulfur hexafluoride air cell 12 is by circulating, cause thermal convection, fast heat is directly transferred to sulfur hexafluoride air cell 12, make the temperature of the sulfur hexafluoride gas of sulfur hexafluoride air cell 12 obtain raising, just can prevent liquefaction or liquefaction too much, namely allow the temperature of sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out be higher than its liquefaction critical temperature all the time, or the density of guaranteeing the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out is higher than the alarming value of primary cut-out, guarantees the safe operation of SF 6 high-voltage circuit breaker when severe cold weather.And when atmospheric temperature rises to another preset value, Based Intelligent Control element 36 just turn-offs controller 33, controller 33 turn-offs heating element 31, heating element 31 just stops to sulphur hexafluoride air accumulator 1 and inner sulfur hexafluoride gas heating, saves energy, the while can prolong the useful life of heating element.For the reliability service of safeguards system, heater also is provided with heating element breaking alarming function simultaneously, namely works as heating element because useful life or damage, cause when opening circuit, Based Intelligent Control element 36 will send alarm signal, notifies the staff in time to handle, and ensures reliably working.
The utility model also can be formed the heating intelligence controlling device by controller 33, temperature sensor 34, temperature sensor 35, Based Intelligent Control element 36, pressure sensor 37 etc., monitor temperature and gas density and ambient temperature and control connection heater in described sulfur hexafluoride air cell and the air accumulator, realize preventing the intellectuality of sulfur hexafluoride gas liquefying plant.Namely by temperature sensor 34, temperature sensor 35, Based Intelligent Control element 36, the effect of pressure sensor 37, detect the atmospheric environment temperature, the sulfur hexafluoride gas temperature of sulphur hexafluoride air accumulator 1 inside, pressure and the density of the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out, even the temperature of the sulfur hexafluoride gas of sulfur hexafluoride air cell 12, and then according to sulfur hexafluoride gas pressure and temp characteristic, and SF 6 high-voltage circuit breaker service requirement, by the intelligent automatic control of Based Intelligent Control element 36 realizations to controller 33 and heating element 31, the temperature that realizes the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out is higher than its liquefaction critical temperature, guarantee SF 6 high-voltage circuit breaker safe operation under extremely cold temperature, guarantee saves energy simultaneously again.
When non-cold season, valve-off 6, this moment, sulphur hexafluoride air accumulator 1 sulfur hexafluoride gas was not communicate with the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out.Cut off the switch 32 of heater 3 simultaneously, heating element 31 is not worked, at this moment, because right and wrong cold seasons, the sulfur hexafluoride gas in the SF 6 high-voltage circuit breaker can not liquefy, and SF 6 high-voltage circuit breaker can trouble free service.
For the SF 6 high-voltage circuit breaker of coming of new, its sulphur hexafluoride air accumulator can directly be connected with sulfur hexafluoride air cell.Prevent that the sulfur hexafluoride gas liquefying plant can be set directly on the SF 6 high-voltage circuit breaker body.For example, prevent that the sulfur hexafluoride gas liquefying plant can be set directly on the mechanism case 14 of SF 6 high-voltage circuit breaker or on the crossbeam, combines together even prevent sulfur hexafluoride gas liquefying plant and SF 6 high-voltage circuit breaker.
See also Fig. 6, Fig. 7, Fig. 8, the third embodiment of SF 6 high-voltage circuit breaker of the present utility model comprises primary cut-out body 11, is arranged on the intrinsic sulfur hexafluoride air cell 12 of primary cut-out, density monitor 13, mechanism case 14, transmission mechanism 15, prevents the sulfur hexafluoride gas liquefying plant.Prevent that the sulfur hexafluoride gas liquefying plant from comprising compositions such as sulphur hexafluoride air accumulator 1, tube connector 2, heater 3, heat insulation layer 4, housing 5, valve 61, valve 62, joint 7, heat insulation layer 8, density monitor 10.And heater 3 mainly is made up of heating element 31, switch 32, automatic constant-temperature controller 38 etc.
When cold season, when temperature decline is very low, open valve 61 and valve 62, open heater 3.When opening valve 61 and valve 62, the sulfur hexafluoride gas of sulphur hexafluoride air accumulator 1 just is connected with the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out.Temperature sensor 381 by automatic constant-temperature controller 38 detects atmospheric temperature, when atmospheric temperature drops to preset value, automatic constant-temperature controller 38 just starts controller 33, controller 33 is opened heating element 31, and heating element 31 just begins to sulphur hexafluoride air accumulator 1 and inner sulfur hexafluoride gas heating.The sulfur hexafluoride gas of the sulfur hexafluoride gas of air accumulator 1 and sulfur hexafluoride air cell 12 is by circulating, cause thermal convection, fast heat is directly transferred to sulfur hexafluoride air cell 12, make the temperature of the sulfur hexafluoride gas of sulfur hexafluoride air cell 12 obtain raising, just can prevent liquefaction or liquefaction too much, namely allow the temperature of sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out be higher than its liquefaction critical temperature all the time, or the density of guaranteeing the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of primary cut-out is higher than the alarming value of primary cut-out, guarantees the safe operation of SF 6 high-voltage circuit breaker when severe cold weather.And when atmospheric temperature rises to another preset value, automatic constant-temperature controller 38 just turn-offs controller 33, controller 33 turn-offs heating element 31, heating element 31 just stops to sulphur hexafluoride air accumulator 1 and inner sulfur hexafluoride gas heating, saves energy, the while can prolong the useful life of heating element.For the reliability service of safeguards system, heater also is provided with heating element breaking alarming function simultaneously, namely works as heating element because useful life or damage, cause when opening circuit, automatic constant-temperature controller 38 will send alarm signal, notifies the staff in time to handle, and ensures reliably working.
In sum, the utility model is owing to adopted to install additional at traditional SF 6 high-voltage circuit breaker and prevented the sulfur hexafluoride gas liquefying plant.Prevent that the sulfur hexafluoride gas liquefying plant is provided with the sulphur hexafluoride air accumulator, and heater can also be set that the gas by heater heating sulphur hexafluoride air accumulator forms convection current.By the heat transfer type of convection current, heat is delivered to the principle of the sulfur hexafluoride air cell in the primary cut-out fast, prevent sulfur hexafluoride gas liquefaction or too much liquefaction, guarantee that primary cut-out is at the cold snap reliability service.Because the sulphur hexafluoride air accumulator is connected with primary cut-out by tube connector, and the sulphur hexafluoride air accumulator adopts steel to be welded, be connected with tube connector by an elongated jointing, all junctions are away from heating element, the temperature of the sealing ring of its junction is fully in normal range of operation, can not make sealing ring aging, the gas leakage phenomenon can not take place.In a word, core innovation part of the present utility model is by installing the sulphur hexafluoride air accumulator additional at traditional SF 6 high-voltage circuit breaker.By heater the sulphur hexafluoride air accumulator is heated, make the sulfur hexafluoride gas in the air accumulator obtain heating earlier, its temperature is raise, form thermal convection with the sulfur hexafluoride gas of sulfur hexafluoride air cell, fast heat is directly delivered to sulfur hexafluoride air cell, make the temperature of the sulfur hexafluoride gas of sulfur hexafluoride air cell obtain raising, the sulfur hexafluoride gas liquefaction or the liquefaction that prevent the intrinsic sulfur hexafluoride air cell of primary cut-out are too much, guarantee the safe operation of SF 6 high-voltage circuit breaker when severe cold weather, overcome the prior art heater directly to the problems (the scape technology introduction of specifically passing away) of sulfur hexafluoride air cell heating, well solved the problem that electric power system exists for many years always: the reliable and secure operation problem of SF 6 high-voltage circuit breaker when severe cold weather.Just think, if do not have to carry out the innovation of installing the sulphur hexafluoride air accumulator at traditional SF 6 high-voltage circuit breaker additional, just can not realize the heat transfer type by thermal convection, heat is delivered to sulfur hexafluoride air cell quickly and efficiently.So, by such innovation, SF 6 high-voltage circuit breaker can not liquefied at its sulfur hexafluoride gas of extremely cold area, in the useful life that also can not reduce SF 6 high-voltage circuit breaker simultaneously, guarantee the SF 6 high-voltage circuit breaker safe operation.Particularly, the utility model can directly be applied on the newly-designed SF 6 high-voltage circuit breaker, also can transform the existing SF 6 high-voltage circuit breaker that has moved.
Those of ordinary skill in the art will be appreciated that, above embodiment only be illustrate of the present utility model, and be not to be used as restriction of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (10)
1. SF 6 high-voltage circuit breaker that is used for cold district, the apparatus body that comprises primary cut-out, be provided with sulfur hexafluoride air cell in the apparatus body, transmission mechanism, sulfur hexafluoride gas density relay, described sulfur hexafluoride air cell is filled with sulfur hexafluoride gas, it is characterized in that: described primary cut-out also comprises and prevents the sulfur hexafluoride gas liquefying plant, this prevents that the sulfur hexafluoride gas liquefying plant from comprising air accumulator and the tube connector that is filled with sulfur hexafluoride gas, one end of described tube connector is sealedly connected on the gas supplementing opening or special-purpose connector of primary cut-out body, and the other end is connected on the air accumulator so that air accumulator is inner and sulfur hexafluoride air cell is interconnected.
2. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1, it is characterized in that: it also further comprises heater, this heater and described air accumulator are set together.
3. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 2, it is characterized in that: it also comprises the heating intelligence controlling device, and this heating intelligence controlling device is monitored in the described air accumulator and/or temperature and gas density and ambient temperature and control connection heater in the sulfur hexafluoride air cell.
4. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 3, it is characterized in that: described heating intelligence controlling device also has heating element breaking alarming circuit.
5. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1, it is characterized in that: the described sulfur hexafluoride gas liquefying plant that prevents also is provided with sulfur hexafluoride density relay or density meter or pressure switch, monitors density and the pressure of the sulfur hexafluoride gas of described air accumulator inside.
6. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1, it is characterized in that: the described sulfur hexafluoride gas liquefying plant that prevents also is provided with muff outward.
7. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1, it is characterized in that: described air accumulator is welded by steel or steel cylinder is made.
8. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1 is characterized in that: describedly prevent from also being provided with on the sulfur hexafluoride gas liquefying plant valve.
9. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1, it is characterized in that: the outside of described tube connector is provided with heat insulation layer.
10. a kind of SF 6 high-voltage circuit breaker for cold district according to claim 1 is characterized in that: be provided with heat insulation layer outside described air accumulator and the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200313331U CN203150461U (en) | 2013-01-22 | 2013-01-22 | Sulfur hexafluoride high-voltage circuit breaker for cold regions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200313331U CN203150461U (en) | 2013-01-22 | 2013-01-22 | Sulfur hexafluoride high-voltage circuit breaker for cold regions |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014114209A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride high-voltage electrical device for cold region |
| WO2014114210A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Method for preventing liquefaction of sulphur hexafluoride gas in high-voltage electrical device |
| WO2014114208A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride gas liquefaction prevention apparatus of sulphur hexafluoride high-voltage electrical device |
| CN109901636A (en) * | 2019-02-21 | 2019-06-18 | 杨志 | A kind of high latitude area antifreeze detection device of SF6 gas transformer |
| CN112798398A (en) * | 2020-12-30 | 2021-05-14 | 广西电网有限责任公司电力科学研究院 | Be used for GIS density relay gas pressure testing arrangement |
-
2013
- 2013-01-22 CN CN2013200313331U patent/CN203150461U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014114209A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride high-voltage electrical device for cold region |
| WO2014114210A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Method for preventing liquefaction of sulphur hexafluoride gas in high-voltage electrical device |
| WO2014114208A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride gas liquefaction prevention apparatus of sulphur hexafluoride high-voltage electrical device |
| CN109901636A (en) * | 2019-02-21 | 2019-06-18 | 杨志 | A kind of high latitude area antifreeze detection device of SF6 gas transformer |
| CN109901636B (en) * | 2019-02-21 | 2020-12-04 | 新沂市锡沂高新材料产业技术研究院有限公司 | SF6 gas transformer anti-freezing detection equipment for high-latitude areas |
| CN112798398A (en) * | 2020-12-30 | 2021-05-14 | 广西电网有限责任公司电力科学研究院 | Be used for GIS density relay gas pressure testing arrangement |
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Effective date of registration: 20170112 Address after: 201802 Shanghai City, Jiading District Nanxiang Town, Yun North Road 1755 Lane 21, B zone four Patentee after: SHANGHAI ROYE ELECTRIC Co.,Ltd. Address before: 201700 Zhujiajue City, Qingpu District, Zhu Feng Road, No. 1603, Patentee before: SHANGHAI ROYE ELECTRIC SCIENCE & TECHNOLOGY Co.,Ltd. |
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