CN203150462U - Sulfur hexafluoride high-voltage electrical equipment for cold regions - Google Patents
Sulfur hexafluoride high-voltage electrical equipment for cold regions Download PDFInfo
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- CN203150462U CN203150462U CN 201320031334 CN201320031334U CN203150462U CN 203150462 U CN203150462 U CN 203150462U CN 201320031334 CN201320031334 CN 201320031334 CN 201320031334 U CN201320031334 U CN 201320031334U CN 203150462 U CN203150462 U CN 203150462U
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Abstract
The utility model relates to sulfur hexafluoride high-voltage electrical equipment. A piece of sulfur hexafluoride high-voltage electrical equipment for cold regions comprises a high-voltage electrical equipment body, wherein a sulfur hexafluoride gas chamber and a density relay are arranged inside the equipment body, and the sulfur hexafluoride gas chamber is filled with sulfur hexafluoride gas. The high-voltage electrical equipment is characterized by further comprising a sulfur hexafluoride gas liquefying prevention device which includes a gas storage tank filled with sulfur hexafluoride gas, a thermal insulation layer 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 electrical equipment body in a sealed mode, the other end of the connecting pipe is connected with the gas storage tank to enable the inside of the gas storage tank and the sulfur hexafluoride gas chamber to be mutually communicated, and the gas storage tank and the thermal insulation layer are arranged together. 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 electrical equipment in severe cold weather can be guaranteed.
Description
Technical field
The utility model relates to high voltage electric equipment, relates in particular to the SF 6 high-voltage electric equipment.
Background technology
Because sulfur hexafluoride gas has excellent insulation and arc extinction performance, is desirable insulation and arc-extinguishing medium in the high voltage electric equipment (especially 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 high voltage electric equipment 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 high voltage electric equipment, portion gas becomes liquid, the density of sulfur hexafluoride gas and pressure will reduce gradually, thereby can cause the insulation property of high voltage electric equipment and connecting-disconnecting function to descend, and have a strong impact on the reliability service of high voltage electric equipment.
The outdoor primary cut-out is the big application of one, its scope of application is big, can be higher than 45 degree areas at latitude and use, 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, and sulfur hexafluoride breaker can be because of sulfur hexafluoride gas liquefaction under this temperature, gas pressure is reduced to the locking force value, sulfur hexafluoride breaker can't operate as normal, has to withdraw from operation, can cause large-area power-cuts when serious.
Be to solve the problem of SF 6 high-voltage electric equipment 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 electric equipment is directly heated.Adopt direct-fired method to improve the sulfur hexafluoride gas temperature of SF 6 high-voltage inside electric appliance, 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 as patent ZL200620086633.X (CN2927307Y) and to be provided with heater, ZL201120025943.1 (CN202013833U) in the primary cut-out bottom base panel 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 high voltage electric equipment, very simple on the principle, but it is very difficult that present technology implements, because the sulfur hexafluoride gas of high voltage electric equipment is sealed in the sulfur hexafluoride air cell in the high voltage electric equipment body, the voltage that adds high voltage electric equipment 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 electric equipment 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 SF 6 high-voltage electric equipment prior art exists, the purpose of this utility model is to provide a kind of SF 6 high-voltage electric equipment 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.
A kind of SF 6 high-voltage electric equipment for cold district of the utility model, the apparatus body that comprises high-voltage electrical apparatus, be provided with sulfur hexafluoride air cell in this apparatus body, density monitor, described sulfur hexafluoride air cell is filled with sulfur hexafluoride gas, described high voltage electric equipment also comprises and prevents the sulfur hexafluoride gas liquefying plant, this device that prevents sulfur hexafluoride gas liquefaction comprises the sulphur hexafluoride air accumulator that is filled with sulfur hexafluoride gas, the sulphur hexafluoride air accumulator is provided heater and the tube connector of heating, one end of described tube connector is sealedly connected on the gas supplementing opening or special-purpose connector of high voltage electric equipment body, and the other end is connected on the gas outlet of sulphur hexafluoride air accumulator so that be interconnected with sulfur hexafluoride air cell in the air accumulator, and described heater and this sulphur hexafluoride air accumulator are set together.
Described a kind of SF 6 high-voltage electric equipment for cold district, described sulphur hexafluoride air accumulator is welded by steel or steel cylinder is made.
Described a kind of SF 6 high-voltage electric equipment for cold district, described heater are arranged on sulphur hexafluoride air accumulator outside, its outer heat insulation layer that is provided with.
Described a kind of SF 6 high-voltage electric equipment for cold district, described heater is arranged in the sulphur hexafluoride air accumulator, and air accumulator is provided with heat insulation layer outward.
Described a kind of SF 6 high-voltage electric equipment 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 electric equipment for cold district, the outside of described tube connector is provided with heat insulation layer.
Described a kind of SF 6 high-voltage electric equipment 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 electric equipment for cold district, described heater have the interior temperature of the described sulfur hexafluoride air cell of monitoring and internal and external temperature transducer, pressure sensor and the Based Intelligent Control element of gas density and ambient temperature.
Described a kind of SF 6 high-voltage electric equipment for cold district, described heater also has heating element breaking alarming circuit.
Described a kind of SF 6 high-voltage electric equipment for cold district, described Based Intelligent Control element is according to the temperature in the air accumulator and/or in the sulfur hexafluoride air cell and gas density and ambient temperature control heating element.
Innovative point of the present utility model is: installs additional at traditional SF 6 high-voltage electric equipment and prevents the sulfur hexafluoride gas liquefying plant, prevent that the sulfur hexafluoride gas liquefying plant is provided with the sulphur hexafluoride air accumulator, and heater.When the ambient temperature of high voltage electric equipment body is hanged down, heater just begins air accumulator is heated, sulfur hexafluoride gas in the air accumulator obtains heating, its temperature will raise, to form convection current 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, prevent liquefaction or liquefaction too much, namely allow the temperature of sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell of high voltage electric equipment be higher than its liquefaction zero boundary's temperature all the time, or the density of guaranteeing the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell of high voltage electric equipment is higher than the alarming value of high voltage electric equipment, guarantees the safe operation of SF 6 high-voltage electric equipment when severe cold weather.Because the sulphur hexafluoride air accumulator is connected with high voltage electric equipment 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 of the present utility model innovation part is by installing the sulphur hexafluoride air accumulator additional at traditional SF 6 high-voltage electric equipment, and heater.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 high voltage electric equipment are too much, guarantee the safe operation of SF 6 high-voltage electric equipment 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 electric equipment when severe cold weather.By such innovation, the SF 6 high-voltage electric equipment can not liquefied at its sulfur hexafluoride gas of extremely cold area, guarantee the safe operation of SF 6 high-voltage electric equipment.The utility model can directly be applied on the newly-designed SF 6 high-voltage electric equipment, also can transform the existing SF 6 high-voltage electric equipment that has moved.
Remarks: described SF 6 high-voltage electric equipment 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 electric equipment 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 electric equipment of the present utility model;
Fig. 3 is the control schematic diagram of the heater that prevents the sulfur hexafluoride gas liquefying plant of a kind of SF 6 high-voltage electric equipment of the utility model;
Fig. 4 is another kind of SF 6 high-voltage electric equipment outline drawing of the present utility model;
Fig. 5 is another kind of SF 6 high-voltage electric equipment outline drawing of the present utility model;
Fig. 6 is the structural representation that prevents the sulfur hexafluoride gas liquefying plant of another kind of SF 6 high-voltage electric equipment of the present utility model shown in Figure 5;
Fig. 7 is the control schematic diagram of the heater that prevents the sulfur hexafluoride gas liquefying plant of of the present utility model another kind of SF 6 high-voltage electric equipment shown in Figure 5;
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, Fig. 3, first kind of SF 6 high-voltage electric equipment of the present utility model comprises high voltage electric equipment body 11, is arranged on the intrinsic sulfur hexafluoride air cell 12 of high voltage electric equipment, density monitor 13, prevents the device of sulfur hexafluoride gas liquefaction.The device that prevents sulfur hexafluoride gas liquefaction comprises 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 temperature sensor 34, environment temperature sensor 35, Based Intelligent Control element 36, pressure sensor 37 etc. in heating element 31, switch 32, controller 33, the device.Wherein sulphur hexafluoride air accumulator 1 is installed in by the high voltage electric equipment, one end of tube connector 2 is sealedly connected on the gas supplementing opening 9 or special-purpose connector of high voltage electric equipment body, and the other end is connected on the gas outlet of valve 6, the air inlet of valve 6 is connected on the gas outlet of sulphur hexafluoride air accumulator 1 and is installed on the 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 can be contained 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.Interior temperature sensor 34 is installed in sulphur hexafluoride air accumulator 1, and outer temperature sensor 35 is installed in the outside of housing 5, can measure outdoor temperature.After installing, sulphur hexafluoride tonifying Qi source of the gas is connected with joint 7, sulphur hexafluoride air accumulator 1 is vacuumized, fill high pure nitrogen, fill sulfur hexafluoride gas again, the sulfur hexafluoride gas pressure in sulphur hexafluoride air accumulator 1 reach that the SF 6 high-voltage electric equipment requires or the rated pressure stipulated till.
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 high voltage electric equipment by tube connector 2 and gas supplementing opening 9.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 is namely to giving 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, when temperature is higher than the temperature of sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of high voltage electric equipment, make the sulfur hexafluoride gas at this two place have the temperature difference.Because the different temperature of two place's sulfur hexafluoride gas cause causing between sulphur hexafluoride air accumulator and the air chamber density contrast, cause convection current.And convection current is conducted because involve dynamic process, thus than directly conduction is rapid, the energy flash heat transfer, 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, density (pressure) rises synchronously, 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 high voltage electric equipment 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 high voltage electric equipment is higher than the alarming value of high voltage electric equipment, guarantees the safe operation of SF 6 high-voltage electric equipment 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 pass through interior temperature sensor 34, outer 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, the pressure density of the sulfur hexafluoride gas of the intrinsic sulfur hexafluoride air cell 12 of high voltage electric equipment, and then according to sulfur hexafluoride gas pressure and temp characteristic, and SF 6 high-voltage electric equipment operation 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 high voltage electric equipment is higher than its liquefaction critical temperature, guarantee the safe operation under extremely cold temperature of SF 6 high-voltage electric equipment, 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 high voltage electric equipment.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 electric equipment can not liquefy, and the SF 6 high-voltage electric equipment can trouble free service.
For the SF 6 high-voltage electric equipment 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 electric equipment body, combine together even prevent sulfur hexafluoride gas liquefying plant and SF 6 high-voltage electric equipment.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, as shown in Figure 4.
See also Fig. 5, Fig. 6, Fig. 7, second kind of embodiment of SF 6 high-voltage electric equipment of the present utility model comprises high voltage electric equipment body 11, is arranged on the intrinsic sulfur hexafluoride air cell 12 of high voltage electric equipment, density monitor 13, 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 high voltage electric equipment.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 high voltage electric equipment 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 high voltage electric equipment is higher than the alarming value of high voltage electric equipment, guarantees the safe operation of SF 6 high-voltage electric equipment 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 electric equipment 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, the gas by heater heating sulphur hexafluoride air accumulator forms thermal convection.By the heat transfer type of convection current, heat is delivered to the principle of the sulfur hexafluoride air cell in the high voltage electric equipment fast, prevent sulfur hexafluoride gas liquefaction or too much liquefaction, guarantee that high voltage electric equipment is at the cold snap reliability service.Because the sulphur hexafluoride air accumulator is connected with high voltage electric equipment 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 electric equipment.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 high voltage electric equipment are too much, guarantee the safe operation of SF 6 high-voltage electric equipment 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 electric equipment 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 electric equipment 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, the SF 6 high-voltage electric equipment can not liquefied at its sulfur hexafluoride gas of extremely cold area, in the useful life that also can not reduce the SF 6 high-voltage electric equipment simultaneously, guarantee the safe operation of SF 6 high-voltage electric equipment.Particularly, the utility model can directly be applied on the newly-designed SF 6 high-voltage electric equipment, also can transform the existing SF 6 high-voltage electric equipment 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 electric equipment that is used for cold district, the apparatus body that comprises high-voltage electrical apparatus, be provided with sulfur hexafluoride air cell in this apparatus body, density monitor, described sulfur hexafluoride air cell is filled with sulfur hexafluoride gas, it is characterized in that: described high voltage electric equipment also comprises and prevents the sulfur hexafluoride gas liquefying plant, this prevents that the sulfur hexafluoride gas liquefying plant from comprising the sulphur hexafluoride air accumulator that is filled with sulfur hexafluoride gas, the sulphur hexafluoride air accumulator is provided heater and the tube connector of heating, one end of described tube connector is sealedly connected on the gas supplementing opening or special-purpose connector of high voltage electric equipment body, and the other end is connected on the gas outlet of sulphur hexafluoride air accumulator so that be interconnected with sulfur hexafluoride air cell in the air accumulator, and described heater and this sulphur hexafluoride air accumulator are set together.
2. a kind of SF 6 high-voltage electric equipment for cold district according to claim 1, it is characterized in that: described sulphur hexafluoride air accumulator is welded by steel or steel cylinder is made.
3. a kind of SF 6 high-voltage electric equipment for cold district according to claim 1 and 2 is characterized in that: described heater is arranged on sulphur hexafluoride air accumulator outside, its outer heat insulation layer that is provided with.
4. a kind of SF 6 high-voltage electric equipment for cold district according to claim 1 and 2, it is characterized in that: described heater is arranged in the sulphur hexafluoride air accumulator, and air accumulator is provided with heat insulation layer outward.
5. a kind of SF 6 high-voltage electric equipment 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 valve.
6. a kind of SF 6 high-voltage electric equipment for cold district according to claim 1, it is characterized in that: the outside of described tube connector is provided with heat insulation layer.
7. a kind of SF 6 high-voltage electric equipment 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.
8. a kind of SF 6 high-voltage electric equipment for cold district according to claim 1 is characterized in that: the temperature that described heater has in the described air accumulator of monitoring and/or sulfur hexafluoride air cell is interior and internal and external temperature transducer, pressure sensor and the Based Intelligent Control element of gas density and ambient temperature.
9. a kind of SF 6 high-voltage electric equipment for cold district according to claim 8, it is characterized in that: described heater also has heating element breaking alarming circuit.
10. a kind of SF 6 high-voltage electric equipment for cold district according to claim 8 is characterized in that: described Based Intelligent Control element is according to the temperature in the air accumulator and/or in the sulfur hexafluoride air cell and gas density and ambient temperature control heating element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320031334 CN203150462U (en) | 2013-01-22 | 2013-01-22 | Sulfur hexafluoride high-voltage electrical equipment for cold regions |
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| CN 201320031334 CN203150462U (en) | 2013-01-22 | 2013-01-22 | Sulfur hexafluoride high-voltage electrical equipment for cold regions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014113911A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Liquefaction prevention apparatus for sulfur hexafluoride gas of sulfur hexafluoride high-voltage electrical equipment |
| WO2014114210A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Method for preventing liquefaction of sulphur hexafluoride gas in high-voltage electrical device |
| WO2014114209A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride high-voltage electrical device for cold region |
| WO2020193061A1 (en) * | 2019-03-28 | 2020-10-01 | Siemens Aktiengesellschaft | High-voltage unit and method for measuring the temperature at a high-voltage unit |
-
2013
- 2013-01-22 CN CN 201320031334 patent/CN203150462U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014113911A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Liquefaction prevention apparatus for sulfur hexafluoride gas of sulfur hexafluoride high-voltage electrical equipment |
| WO2014114210A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Method for preventing liquefaction of sulphur hexafluoride gas in high-voltage electrical device |
| WO2014114209A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride high-voltage electrical device for cold region |
| WO2014113912A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulfur hexafluoride high-voltage electrical equipment used in cold regions |
| WO2014114208A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulphur hexafluoride gas liquefaction prevention apparatus of sulphur hexafluoride high-voltage electrical device |
| WO2020193061A1 (en) * | 2019-03-28 | 2020-10-01 | Siemens Aktiengesellschaft | High-voltage unit and method for measuring the temperature at a high-voltage unit |
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