CN109901636B - SF6 gas transformer anti-freezing detection equipment for high-latitude areas - Google Patents
SF6 gas transformer anti-freezing detection equipment for high-latitude areas Download PDFInfo
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- CN109901636B CN109901636B CN201910128198.4A CN201910128198A CN109901636B CN 109901636 B CN109901636 B CN 109901636B CN 201910128198 A CN201910128198 A CN 201910128198A CN 109901636 B CN109901636 B CN 109901636B
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Abstract
The invention discloses an anti-freezing detection device for an SF6 gas transformer in a high latitude area, which structurally comprises a first binding post, a second binding post, a ceramic insulating cylinder, a device main body, an SF6 gas cavity, a gas density measurement induction block, an anti-freezing solution flow channel and a contact type temperature induction adjusting mechanism, wherein the contact type temperature induction adjusting mechanism is arranged, a trigger power-on mechanism is matched with a sliding rod, so that the contact area of the trigger power-on mechanism and the sliding rod is large enough to prevent local short circuit, a motor rotating mechanism is matched with a current induction heating mechanism, the anti-freezing solution is stirred while being heated, so that the anti-freezing solution flows, the heating process of the anti-freezing solution is accelerated, the heat loss is reduced, the anti-freezing solution cavity is matched with a heat exchange mechanism, the contact area of the anti-freezing solution with sulfur hexafluoride gas is increased, the sulfur hexafluoride gas is rapidly heated to increase the, the normal use of the equipment under the low-temperature environment in winter is ensured.
Description
Technical Field
The invention relates to gas detection equipment, in particular to anti-freezing detection equipment for an SF6 gas transformer used in high latitude areas.
Background
The transformer is commonly used in circuit equipment for voltage exchange, current exchange and the like, sulfur hexafluoride gas is a non-toxic inert gas and is commonly used in the transformer to play roles of arc extinction and insulation, and the transformer with the sulfur hexafluoride gas is widely used, but has a problem when being used in high-latitude areas; in high-altitude areas, winter is long, the temperature in winter is low, the temperature in winter is often lower than twenty-three degrees below zero, sulfur hexafluoride gas can be liquefied at about twenty-five degrees below zero, once the sulfur hexafluoride gas is liquefied, normal arc extinction and insulation can not be carried out, and equipment cannot work normally.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the anti-freezing detection equipment for the SF6 gas transformer in the high latitude area, so as to solve the problems that the temperature in winter is low, the temperature in winter is often lower than minus twenty-three degrees, the sulfur hexafluoride gas is liquefied at about minus twenty-five degrees, once liquefied, the normal arc extinction and insulation cannot be carried out, and the equipment cannot normally work.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a high latitude is check out test set that prevents frostbite of SF6 gas transformer for area, its structure includes first terminal, second terminal, ceramic insulation cylinder, device main part, SF6 gas chamber, gas density measurement response piece, antifreeze runner, contact temperature-sensing adjustment mechanism, first terminal welds the right-hand member in device main part upper surface, the second terminal welding is in the middle section of device main part upper surface, ceramic insulation cylinder clearance fit is in the outer lane of second terminal, the gaseous chamber of SF6 inlays in the inside upper end of device main part, gas density measurement response piece sliding connection is at the inside left end in SF6 gas chamber, the antifreeze runner inlays in the inside left end of device main part, contact temperature-sensing adjustment mechanism welds the inside right-hand member of device main part.
In order to optimize the technical scheme, the method further comprises the following steps:
in the above scheme, contact temperature-sensing adjustment mechanism comprises heat preservation base, heat insulating board, antifreeze liquid chamber, heat exchange mechanism, magnetic shield, motor slewing mechanism, current induction heating mechanism, trigger formula electric current on-off mechanism welds the left end at the heat preservation base, antifreeze liquid chamber inlays in the inside middle section of heat preservation base, the lower extreme in antifreeze liquid chamber is glued to the heat insulating board, heat exchange mechanism interference fit is in antifreeze liquid chamber's upper end, magnetic shield glued joint is in the inside upper end of heat preservation base, motor slewing mechanism welds the left end at the inside of heat preservation base, current induction heating mechanism glued joint is in the inside left end of antifreeze liquid chamber.
In the above scheme, heat exchange mechanism comprises heat absorption bottom plate, radiating seat, heat transfer logical groove, through-hole, the heat absorption bottom plate welds in the lower extreme of radiating seat, the heat transfer leads to the groove and inlays in the inside of radiating seat, the through-hole is equipped with more than two altogether and inlays respectively in both ends about the radiating seat is inside.
In the above scheme, motor slewing mechanism comprises induction heating section of thick bamboo, antifreeze solution stirring bent plate, stirring rod, driving motor, stirring rod mechanical connection is in driving motor's lower extreme, induction heating section of thick bamboo welding is at the lower extreme of stirring rod, antifreeze solution stirring bent plate is equipped with more than two altogether and welds the outer lane at stirring rod respectively.
In the above scheme, current induction heating mechanism comprises support pin, fixed ring, circular telegram coil, support the pin welding at the lower extreme of fixed ring, circular telegram coil encircles the outer lane of connecting at fixed ring, support the pin and glue the left end of connecting in the antifreeze intracavity portion.
In the above scheme, trigger formula electric current on-off mechanism comprises controller, transmission wire, trigger circular telegram mechanism, slide bar, slip chamber, response seat, the slip chamber inlays in the inside lower extreme of response seat, slide bar sliding connection is in the inside in slip chamber, trigger circular telegram mechanism and glue the upper surface of connecting in the slip intracavity portion, the controller welding is at the inside right-hand member of response seat, the left end of controller is connected with trigger circular telegram mechanism electricity through the transmission wire.
In the above scheme, the trigger power-on mechanism is composed of a rubber frame, a contact chain plate, a connecting rod and a contact block, the contact block is connected to the upper end of the rubber frame in an adhesive manner, the connecting rod is embedded at the right end inside the rubber frame, the contact chain plate is connected to the lower surface of the rubber frame in an adhesive manner, and the lower end of the connecting rod is welded to the upper end of the contact chain plate.
Advantageous effects
The invention relates to an anti-freezing detection device for an SF6 gas transformer in a high latitude area, when in use, an operator places the device at a proper position, when the temperature in winter is reduced to a certain degree, the gas in an SF6 gas cavity is cooled and contracted, a gas density measurement sensing block moves rightwards under the action of atmospheric pressure, then a short rod at the lower left corner of the gas density measurement sensing block moves rightwards along with the right movement, the liquid in an anti-freezing liquid flow passage is anti-freezing liquid, the anti-freezing liquid cannot be frozen, a sealing structure is arranged in the anti-freezing liquid flow passage, the liquid pressure enables a sliding rod in a trigger type current on-off mechanism to move leftwards, two pulleys are arranged on the upper surface at the right end of the sliding rod, after the sliding rod moves forwards, the sliding rod moves rightwards to be in contact with the trigger power-on mechanism, the pulleys cannot block the trigger power-on mechanism, the lower end of the trigger power, the rubber frame is bent, the contact chain plate is formed by mechanically connecting a plurality of chain plates, each chain plate can independently move and is completely contacted with the upper surface of the right end of the sliding rod, the contact area is enlarged, the short circuit caused by overhigh temperature due to local contact is avoided, after the contact, a circuit of the controller is switched on, the controller supplies power to the motor rotating mechanism and the current induction heating mechanism to enable the electrified coil to be electrified and then generate an alternating magnetic field, the fixed ring is in a closed structure to form a vortex, the stirring rod is driven to rotate by electrifying the motor, the induction heating cylinder rotates in the fixed ring to enable the surface of the induction heating cylinder to form the vortex to generate heat, the antifreeze in the antifreeze cavity is heated, the antifreeze stirring curved structure of the antifreeze stirring curved plate is beneficial to the rapid flow of the antifreeze in the rotating process, so that the antifreeze is rapidly heated, and the bottom plate at the lower end of the heat absorption heat exchange mechanism is contacted with the heated antifreeze, in transferring the heat to the gas in SF6 gas chamber, the heat transfer logical groove has improved the area of contact with gaseous with the through-hole, is favorable to going on fast of heat transfer process, makes sulfur hexafluoride gas be heated fast, prevents to take place liquefaction phenomenon to accomplish work.
The invention relates to an anti-freezing detection device for an SF6 gas transformer in a high latitude area, which is characterized in that a contact type temperature sensing and adjusting mechanism is arranged, a trigger power-on mechanism is matched with a sliding rod, so that the contact area of the trigger power-on mechanism and the sliding rod is large enough to prevent the generation of local short circuit, a motor rotating mechanism is matched with a current sensing and heating mechanism, an anti-freezing solution is stirred while being heated, the anti-freezing solution flows, the heating process of the anti-freezing solution is accelerated, the heat loss is reduced, an anti-freezing solution cavity is matched with a heat exchange mechanism, the contact area of the anti-freezing solution cavity and sulfur hexafluoride gas is increased, the sulfur hexafluoride gas is heated rapidly to raise the temperature, the liquefaction phenomenon is prevented, and the normal use of.
Drawings
Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of the embodiments of the invention when taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of an anti-freezing detection device for an SF6 gas transformer in a high-altitude area according to the invention.
Fig. 2 is a schematic structural diagram of a section of the anti-freezing detection equipment for the SF6 gas transformer in the high latitude area.
Fig. 3 is a detailed structural diagram of the cross section of the contact temperature sensing adjustment mechanism of the present invention.
FIG. 4 is a schematic left-side sectional view of the heat exchange mechanism of the present invention.
Fig. 5 is an enlarged structural schematic diagram of the motor rotating mechanism of the present invention.
FIG. 6 is an enlarged schematic view of structure A of FIG. 3 according to the present invention.
Fig. 7 is an enlarged schematic structural diagram of the trigger type current on-off mechanism of the present invention.
Fig. 8 is a detailed structural diagram of the cross section of the trigger power-on mechanism of the present invention.
Description of reference numerals: the device comprises a first terminal 1, a second terminal 2, a ceramic insulating cylinder 3, a device body 4, an SF6 gas cavity 5, a gas density measurement sensing block 6, an antifreeze fluid flow passage 7, a contact type temperature sensing adjusting mechanism 8, a heat preservation base 81, a heat insulation plate 82, an antifreeze fluid cavity 83, a heat exchange mechanism 84, a magnetic insulation plate 85, a motor rotating mechanism 86, a current induction heating mechanism 87, a trigger type current on-off mechanism 88, a heat absorption bottom plate 841, a heat dissipation seat 842, a heat exchange through groove 843, a through hole 844, an induction heating cylinder 861, an antifreeze fluid stirring curved plate 862, a stirring rod 863, a driving motor 864, a supporting thin rod 871, a fixed ring 872, an energizing coil 873, a controller 881, a transmission lead 882, a trigger energizing mechanism 883, a sliding rod 884, a sliding cavity chain plate 885, a sensing seat 886, a rubber frame 8831, a contact type 8832, a connecting rod 8833 and a contact block 8834.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1-2, the present invention provides an anti-freezing detection apparatus for SF6 gas transformer in high altitude areas: its structure includes first terminal 1, second terminal 2, ceramic insulator 3, device main part 4, SF6 gas chamber 5, gas density measurement response piece 6, antifreeze runner 7, contact temperature-sensing adjustment mechanism 8, first terminal 1 welds the right-hand member at device main part 4 upper surface, second terminal 2 welds the middle section at device main part 4 upper surface, 3 clearance fit of ceramic insulator is in the outer lane of second terminal 2, SF6 gas chamber 5 inlays at the inside upper end of device main part 4, gas density measurement response piece 6 sliding connection is at the inside left end in SF6 gas chamber 5, antifreeze runner 7 inlays at the inside left end of device main part 4, contact temperature-sensing adjustment mechanism 8 welds the inside right-hand member of device main part 4, and the left lower extreme of gas density measurement response piece 6 is equipped with a short bar, and when controlling gas density measurement response piece 6 and remove the liquid of antifreeze runner 7 and extrude and make the antifreeze runner 7 inside liquid move about The contact type temperature sensing adjusting mechanism 8 is opened and closed, liquid in the anti-freezing liquid flow channel 7 is anti-freezing liquid, and the anti-freezing liquid cannot be frozen in a low-temperature environment, so that the anti-freezing liquid is suitable for severe cold areas with high latitudes.
Referring to fig. 3, the contact temperature sensing adjustment mechanism 8 is composed of a heat insulation base 81, a heat insulation plate 82, an antifreeze liquid cavity 83, a heat exchange mechanism 84, a magnetic isolation plate 85, a motor rotation mechanism 86, a current sensing heating mechanism 87, and a trigger type current on-off mechanism 88, the trigger type current on-off mechanism 88 is welded at the left end of the heat insulation base 81, the antifreeze liquid cavity 83 is embedded in the middle section of the heat insulation base 81, the heat insulation plate 82 is connected to the lower end of the antifreeze liquid cavity 83 by glue, the heat exchange mechanism 84 is in interference fit with the upper end of the antifreeze liquid cavity 83, the magnetic isolation plate 85 is connected to the upper end of the heat insulation base 81 by glue, the motor rotation mechanism 86 is welded at the left end of the heat insulation base 81, the current sensing heating mechanism 87 is connected to the left end of the antifreeze liquid cavity 83 by glue, and the heat insulation plate 82 prevents the, reduce thermal loss, heat exchange mechanism 84 prevents that SF6 gas temperature from crossing excessively and liquefying in the effectual SF6 gas chamber 5 of transferring of the inside heat of antifreeze liquid chamber 83, and magnetic shield 85 can be isolated to the magnetic field that current induction heating mechanism 87 produced, prevents that SF6 gas from receiving the magnetic field influence.
Referring to fig. 4, the heat exchange mechanism 84 includes a heat absorption bottom plate 841, a heat dissipation seat 842, heat exchange through grooves 843, and through holes 844, the heat absorption bottom plate 841 is welded to the lower end of the heat dissipation seat 842, the heat exchange through grooves 843 are embedded in the heat dissipation seat 842, the through holes 844 are provided with more than two through grooves and are respectively embedded at the left end and the right end of the heat dissipation seat 842, and the heat exchange through grooves 843 and the through holes 844 can increase the contact area between the heat dissipation seat 842 and the SF6 gas in the SF6 gas cavity 5, and accelerate the heat exchange of the SF6 gas.
Referring to fig. 5, the motor rotating mechanism 86 is composed of an induction heating cylinder 861, an antifreeze solution stirring curved plate 862, a stirring rod 863, and a driving motor 864, wherein the stirring rod 863 is mechanically connected to a lower end of the driving motor 864, the induction heating cylinder 861 is welded to a lower end of the stirring rod 863, the antifreeze solution stirring curved plate 862 is provided with two or more than two parts and is respectively welded to an outer ring of the stirring rod 863, the induction heating cylinder 861 can cut a magnetic field generated by the current induction heating mechanism 87 to form a corresponding vortex on a surface thereof to generate heat, so as to heat the antifreeze solution in the antifreeze solution cavity 83, and the antifreeze solution stirring curved plate 862 can flow the antifreeze solution in the antifreeze solution cavity 83 during rotation, thereby increasing heat transfer speed and efficiency and reducing heat loss.
Referring to fig. 6, the current induction heating mechanism 87 is composed of a supporting thin rod 871, a fixing ring 872 and an electrified coil 873, the supporting thin rod 871 is welded at the lower end of the fixing ring 872, the electrified coil 873 is connected around the outer ring of the fixing ring 872, and the supporting thin rod 871 is connected to the left end inside the antifreeze chamber 83 by glue.
Referring to fig. 7, the triggered current on/off mechanism 88 comprises a controller 881, a transmission wire 882, a triggered current on/off mechanism 883, a sliding rod 884, a sliding cavity 885, and a sensing seat 886, wherein the sliding cavity 885 is embedded in the lower end of the sensing seat 886, the sliding rod 884 is slidably connected in the sliding cavity 885, the triggered current on mechanism 883 is adhesively connected on the upper surface of the sliding cavity 885, the controller 881 is welded at the right end of the sensing seat 886, the left end of the controller 881 is electrically connected with the triggered current on mechanism 883 through the transmission wire 882, and two pulleys are arranged at the upper end of the sliding rod 884, so that the friction of the sliding rod 884 in the sliding process can be reduced and the triggered current on/off mechanism 883 can be conveniently connected in the front and back.
Referring to fig. 8, the trigger power mechanism 883 comprises a rubber frame 8831, a contact link 8832, a connecting rod 8833, and a contact block 8834, wherein the contact block 8834 is adhesively connected to the upper end of the rubber frame 8831, the connecting rod 8833 is embedded at the right end inside the rubber frame 8831, the contact link 8832 is adhesively connected to the lower surface of the rubber frame 8831, the lower end of the connecting rod 8833 is welded to the upper end of the contact link 8832, the rubber frame 8831 has a certain length and is flexible, and after the sliding rod 884 contacts the rubber frame 8831, each link is movably connected to the middle section of the upper surface of the sliding rod 884 due to a plurality of plates, so as to increase the contact area and prevent short circuit caused by high temperature due to local contact.
When the device is used, an operator places the device at a proper position, when the temperature in winter drops to a certain degree, the gas in the SF6 gas cavity 5 is cooled and contracted, the gas density measurement sensing block 6 moves rightwards under the action of atmospheric pressure, then the short rod at the lower left corner of the gas density measurement sensing block 6 moves rightwards along with the rightwards, the liquid in the antifreeze fluid flow channel 7 is antifreeze fluid, the antifreeze fluid cannot be frozen, the inner part of the antifreeze fluid flow channel 7 is a sealed structure, the liquid pressure enables the sliding rod 884 in the trigger type current on-off mechanism 88 to move leftwards, the upper surface at the right end of the sliding rod 884 is provided with two pulleys, the sliding rod 884 moves rightwards and is in front and back, the sliding rod 884 is contacted with the trigger type current on-off mechanism 883, the pulleys cannot block the trigger type current on-off mechanism 883, the lower end of the trigger type current on-off mechanism 883 is contacted with the middle, the rubber frame 8831 is bent, the contact chain plate 8832 is formed by mechanically connecting a plurality of chain plates, each chain plate can independently move and is completely contacted with the upper surface at the right end of the sliding rod 884, the contact area is enlarged, the phenomenon that the temperature is overhigh and short circuit is caused by local contact is avoided, after the contact, the circuit of the controller 881 is switched on, the controller 881 supplies power to the motor rotating mechanism 86 and the current induction heating mechanism 87 to electrify the electrifying coil 873 and generate an alternating magnetic field, the fixed ring 872 is in a closed structure to form eddy current, the driving motor 864 is electrified and rotated to rotate the stirring rod 863, the induction heating cylinder 861 rotates in the fixed ring 872 to form the eddy current on the surface of the induction heating cylinder to generate heat, the antifreeze in the antifreeze cavity 83 is heated, the antifreeze stirring curved plate 862 of the antifreeze flows in the rotating process, the curved structure of the antifreeze stirring curved plate 862 is favorable for the rapid flow of the antifreeze, therefore, the antifreeze solution is heated rapidly, the heat absorption bottom plate 841 at the lower end of the heat exchange mechanism 84 is contacted with the heated antifreeze solution to transfer heat to the gas in the SF6 gas cavity 5, the heat exchange through groove 843 and the through hole 844 increase the contact area with the gas, the rapid heat exchange process is facilitated, the sulfur hexafluoride gas is heated rapidly, the liquefaction phenomenon is prevented, and the work is finished.
According to the invention, through the mutual combination of the components, the trigger power-on mechanism 883 is matched with the sliding rod 884, so that the contact area between the trigger power-on mechanism and the sliding rod is large enough to prevent local short circuit, the motor rotating mechanism 86 is matched with the current induction heating mechanism 87, the antifreeze is stirred while being heated, so that the antifreeze flows, the heating process of the antifreeze is accelerated, and the heat loss is reduced, the contact area between the antifreeze and sulfur hexafluoride gas is increased by matching the antifreeze cavity 83 and the heat exchange mechanism 84, so that the sulfur hexafluoride gas is heated rapidly to raise the temperature, the liquefaction phenomenon is prevented, and the normal use of the equipment in the low-temperature environment in winter is ensured.
The specific embodiments described herein are merely illustrative of the invention.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall be understood as falling within the scope of the present invention.
Claims (2)
1. The utility model provides a high latitude is SF6 gas transformer check out test set that prevents frostbite for district, its structure includes first terminal (1), second terminal (2), ceramic insulating cylinder (3), device main part (4), SF6 gas chamber (5), gas density measurement response piece (6), antifreeze runner (7), contact temperature-sensing adjustment mechanism (8), first terminal (1) welds the right-hand member in device main part (4) upper surface, second terminal (2) welds the middle section in device main part (4) upper surface, ceramic insulating cylinder (3) clearance fit is in the outer lane of second terminal (2), SF6 gas chamber (5) inlays in the inside upper end of device main part (4), gas density measurement response piece (6) sliding connection is at the inside left end of SF6 gas chamber (5), antifreeze runner (7) inlays in the inside left end of device main part (4), contact temperature-sensing adjustment mechanism (8) welding is at the inside right-hand member of device main part (4), its characterized in that:
the contact temperature induction adjusting mechanism (8) consists of a heat insulation base (81), a heat insulation plate (82), an antifreezing solution cavity (83), a heat exchange mechanism (84), a magnetic isolation plate (85), a motor rotating mechanism (86), a current induction heating mechanism (87) and a trigger type current on-off mechanism (88), the trigger type current on-off mechanism (88) is positioned at the left end of the heat-insulating base (81), the antifreeze liquid cavity (83) is arranged at the middle section inside the heat-insulating base (81), the heat insulation plate (82) is arranged at the lower end of the antifreezing fluid cavity (83), the heat exchange mechanism (84) is positioned at the upper end of the antifreezing fluid cavity (83), the magnetic isolation plate (85) is arranged at the upper end inside the heat preservation base (81), the motor rotating mechanism (86) is fixed at the left end inside the heat preservation base (81), the current induction heating mechanism (87) is positioned at the left end inside the antifreezing fluid cavity (83);
the heat exchange mechanism (84) is composed of a heat absorption bottom plate (841), a heat dissipation seat (842), heat exchange through grooves (843) and through holes (844), the heat absorption bottom plate (841) is located at the lower end of the heat dissipation seat (842), the heat exchange through grooves (843) are arranged inside the heat dissipation seat (842), and the through holes (844) are provided with more than two and are respectively arranged at the left end and the right end inside the heat dissipation seat (842);
the motor rotating mechanism (86) is composed of an induction heating cylinder (861), an antifreeze solution stirring crank plate (862), a stirring rod (863) and a driving motor (864), wherein the stirring rod (863) is positioned at the lower end of the driving motor (864), the induction heating cylinder (861) is fixed at the lower end of the stirring rod (863), and the antifreeze solution stirring crank plate (862) is provided with more than two and is respectively arranged on the outer ring of the stirring rod (863);
the current induction heating mechanism (87) comprises a supporting thin rod (871), a fixed circular ring (872) and an electrified coil (873), wherein the supporting thin rod (871) is fixed at the lower end of the fixed circular ring (872), the electrified coil (873) is arranged on the outer ring of the fixed circular ring (872), and the supporting thin rod (871) is positioned at the left end inside the antifreezing fluid cavity (83);
trigger formula electric current on-off mechanism (88) comprises controller (881), transmission wire (882), trigger circular telegram mechanism (883), slide bar (884), sliding chamber (885), response seat (886), sliding chamber (885) is located the inside lower extreme of response seat (886), the inside at sliding chamber (885) is installed in slide bar (884), trigger circular telegram mechanism (883) and fix the upper surface at sliding chamber (885) inside, the right-hand member at response seat (886) inside is installed in controller (881), the left end of controller (881) is connected with trigger circular telegram mechanism (883) through transmission wire (882).
2. The anti-freezing detection device for the SF6 gas transformer in the high latitude area of claim 1, wherein: the trigger power-on mechanism (883) comprises a rubber frame (8831), a contact chain plate (8832), a connecting rod (8833) and a contact block (8834), wherein the contact block (8834) is positioned at the upper end of the rubber frame (8831), the connecting rod (8833) is arranged at the right end inside the rubber frame (8831), the contact chain plate (8832) is fixed on the lower surface of the rubber frame (8831), and the lower end of the connecting rod (8833) is connected with the upper end of the contact chain plate (8832).
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| CN201910128198.4A CN109901636B (en) | 2019-02-21 | 2019-02-21 | SF6 gas transformer anti-freezing detection equipment for high-latitude areas |
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| CN206003683U (en) * | 2016-06-23 | 2017-03-08 | 上海上芃电气有限公司 | A kind of SF with high in the clouds monitoring6Breaker prevents liquefying plant |
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