CN103390485B - A kind of strong cold transformer of liquid nitrogen and refrigerating method thereof - Google Patents
A kind of strong cold transformer of liquid nitrogen and refrigerating method thereof Download PDFInfo
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- CN103390485B CN103390485B CN201310312188.9A CN201310312188A CN103390485B CN 103390485 B CN103390485 B CN 103390485B CN 201310312188 A CN201310312188 A CN 201310312188A CN 103390485 B CN103390485 B CN 103390485B
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 276
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 138
- 239000007788 liquid Substances 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 12
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 35
- 238000001704 evaporation Methods 0.000 claims abstract description 22
- 238000000605 extraction Methods 0.000 claims abstract description 22
- 230000008020 evaporation Effects 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000012774 insulation material Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000011490 mineral wool Substances 0.000 claims description 4
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims description 3
- 238000009834 vaporization Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- -1 as everyone knows Substances 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Transformer Cooling (AREA)
Abstract
The present invention relates to the strong cold transformer of a kind of liquid nitrogen and refrigerating method thereof.This transformer comprises oil tank of transformer and liquid nitrogenous hood, liquid nitrogenous hood is connected with liquid nitrogen extraction tube, oil tank of transformer is connected with gas nitrogen outlet, oil tank of transformer inner disc is wound with evaporation tube, one end of evaporation tube is communicated with liquid nitrogen extraction tube, the other end is communicated with gas nitrogen outlet, gas nitrogen outlet is provided with liquid nitrogen compressor, condenser and choke valve successively, the end of gas nitrogen outlet stretches into the inside of liquid nitrogenous hood, be provided with temperature inductor in oil tank of transformer, liquid nitrogen extraction tube is provided with the insulation electromagnetically operated valve be electrically connected with temperature inductor.Beneficial effect is: 1), liquid nitrogen and transformer oil carry out heat exchange, and heat exchanger effectiveness is high, and gaseous nitrogen, through liquid nitrogen compressor and condenser, is converted into liquid nitrogen again, recycles; 2), oil tank of transformer passes through transformer oil circulation pipe and oil circulating pump, the transformer oil iterative cycles in upper and lower cavity, the equilibrium of maintenance oil temperature.
Description
Technical field
The invention belongs to transformer cooling system, especially relate to and a kind ofly utilize the strong cold transformer of the liquid nitrogen of liquid nitrogen forced refrigeration and refrigerating method thereof.
Background technology
Transformer is electric equipment conventional in productive life, mainly contains the functions such as buck/boost, matched impedance and Secure isolation.Divide by the type of cooling, transformer can be divided into dry-type transformer and oil-filled transformer, wherein, dry-type transformer relies on cross-ventilation to carry out nature cooling or increases blower fan cooling, is used for skyscraper, the electricity consumption of high speed toll station and the small capacity transformer such as localized lighting, electronic circuit; Oil-filled transformer mainly relies on oil to make coolant, as modes such as oil, oil, oil immersed water cool, forced oil-circulation, reaches the object reducing transformer oil oil temperature.
Cored and the winding coil of general inside transformer, for oil-filled transformer, also transformer oil is housed in transformer tank, transformer oil adopts mineral insulating oil mostly, main following several effect: 1) insulating effect: transformer oil has the dielectric strength more much higher than air.Insulating material is immersed in oil, not only can improve dielectric strength, but also can from the erosion of moisture; 2) thermolysis: the specific heat of transformer oil is large, is commonly used for cooling agent, the heat produced when transformer runs makes to rise near the oily expanded by heating of iron core and winding, and by the convection current up and down of oil, heat is shed by radiator, ensures that transformer normally runs; 3) extinguishing arc effect: on the on-load voltage regulating switch of oil circuit breaker and transformer, can produce electric arc when contact switches.Due to transformer oil good heat conductivity, and can divide under the high temperature action of electric arc and touched a large amount of gas, produce larger pressure, thus improve the arc extinction performance of medium, electric arc is extinguished very soon.
In radiation processes, transformer oil can absorb amount of heat, if transformer oil is overheated, the normal use of transformer can be affected, thus also need to cool transformer oil by other means, more conventional transformer cooling system is taked water-cooled to exchange or is utilized the self cooling mode of fin oil circulation to carry out, but the cooling effectiveness of two kinds of types of cooling is all poor, a kind of water-cooled is now provided to exchange transformer cooling system, as notification number is: a kind of water cooling transformer that the Chinese utility model of CN202917292U provides, described cooling device is made up of cavity plate, described cavity plate lower end is provided with water inlet tap, upper end is provided with faucet, the described embedded encirclement of cavity plate is arranged between primary coil in transformer body and secondary coil.This water-cooled transformer adopts water-cooled exchange principle to reduce the oil temperature of transformer oil, but the critical temperature of water is higher, water at normal temperature is liquid, the heat of absorption and heat exchange is just less, heat absorption efficiency is poor, for ensureing cooling effectiveness, just need a large amount of aqueous water, this in turn increases production cost, extend cooling time, if reduce the temperature of water, as everyone knows, water will congeal into ice below zero degrees celsius, solid ice moves inconvenience, easily result in blockage, be not suitable as cooling agent to use, thus the water-cooled exchange type of cooling has some limitations.
Summary of the invention
The present invention mainly exchanges for existing transformer oil water-cooled that cost existing for the type of cooling is high, heat exchanger effectiveness is low, the problem that cooling time is longer, there is provided one can be recycled, cost is lower, heat exchanger effectiveness is high, the strong cold transformer of liquid nitrogen that cooling time is short and refrigerating method thereof.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: the strong cold transformer of a kind of liquid nitrogen, comprise the oil tank of transformer that transformer oil is housed, iron core is provided with in oil tank of transformer, iron core is externally connected to Transformer Winding coil, it also comprises the liquid nitrogenous hood that liquid nitrogen is housed, liquid nitrogenous hood is connected with liquid nitrogen extraction tube, oil tank of transformer is connected with gas nitrogen outlet, evaporation tube is had along cabinet wall coiling in oil tank of transformer, one end of evaporation tube is communicated with liquid nitrogen extraction tube, the other end is communicated with gas nitrogen outlet, gas nitrogen outlet is provided with liquid nitrogen compressor successively, condenser and choke valve, the end of gas nitrogen outlet stretches into the inside of liquid nitrogenous hood, temperature inductor is provided with in oil tank of transformer, liquid nitrogen extraction tube is provided with the insulation electromagnetically operated valve be electrically connected with temperature inductor.Coolant by conventional liquid water, is replaced with liquid nitrogen by the present invention, because the temperature of liquid nitrogen is at subzero-196 degree, boiling point-195.8 is spent, critical temperature-147 is spent, and critical pressure 3.39Mpa, compared with aqueous water, liquid nitrogen has very low temperature, better can absorb heat in cooling procedure, heat exchanger effectiveness is higher, and cooling time is short, in addition the characteristic of liquid nitrogen be colorless and odorless, nonflammable, can not explode, be the more satisfactory coolant of transformer oil.The effect of insulation electromagnetically operated valve is when temperature inductor measures the temperature of setting, automatically opens insulation electromagnetically operated valve, and liquid nitrogen flows into oil tank of transformer, cools transformer oil in oil tank of transformer.The evaporation tube be made up of a circle copper pipe is set bottom oil tank of transformer, the outlet of evaporation tube is identical with the direction of entrance, the outlet of evaporation tube is located at the top of oil tank of transformer, the outlet of evaporation tube is communicated with liquid nitrogen extraction tube, the entrance of evaporation tube is communicated with gas nitrogen outlet, finally access liquid nitrogen compressor, gas after liquid gasification is sucked compressor, condenser is entered after compressor compression, between condenser to liquid nitrogenous hood, the choke valve be made up of thin copper pipe is set, make gaseous nitrogen be reduced to liquid nitrogen and enter liquid case, enter next cool cycles.
Above-mentioned technical problem of the present invention is solved by following technical proposals simultaneously: the cooling means of the strong cold transformer of a kind of liquid nitrogen, comprise following use procedure: a), according to the serviceability temperature of transformer oil, the predetermined value of design temperature inductor, after transformer oil the temperature inside the box reaches preset temperature, temperature inductor sends signal, after Received signal strength, insulation electromagnetically operated valve, liquid nitrogen compressor and condenser start simultaneously; B) liquid nitrogen, in liquid nitrogenous hood flows into liquid nitrogen extraction tube, and enters in evaporation tube, and the liquid nitrogen in evaporation tube absorbs the heat of transformer oil, vaporization reaction occurs and is also converted into gaseous nitrogen; C), gaseous nitrogen enters liquid nitrogen compressor by gas nitrogen outlet, and enter condenser cooling after compression again, gaseous nitrogen is reduced to liquid nitrogen, and enters in liquid nitrogenous hood through choke valve; D), repeat above a, b, c tri-steps, liquid nitrogen repetitive cycling utilizes, until the oil temperature in oil tank of transformer is in the temperature range of regulation.
As preferably, the outside of described oil tank of transformer is provided with transformer oil circulation pipe, one end of transformer oil circulation pipe is communicated with the upper chamber of oil tank of transformer, and the other end is communicated with the lower cavity of oil tank of transformer, and transformer oil circulation pipe is provided with oil circulating pump.Because the evaporation tube of liquid nitrogen is in the bottom of oil tank of transformer, and oil tank of transformer maximum temperature is at top of oil-tank, namely in upper chamber, in order to reduce fuel tank bulk temperature better, can outside fuel tank an external transformer oil circulation pipe, keep the transformer oil oil temperature in upper and lower cavity balanced, transformer oil circulation pipe connects oil circulating pump, the circuit of oil circulating pump is in parallel with insulation electromagnetically operated valve, after temperature inductor measures predetermined temperature, be incubated electromagnetically operated valve and oil circulating pump and compressor to start simultaneously, and when transformer is out of service, close simultaneously.
As preferably, the outside of described oil tank of transformer is provided with transformer oil circulation pipe, one end of transformer oil circulation pipe is communicated with the upper chamber of oil tank of transformer, the other end is communicated with the lower cavity of oil tank of transformer, transformer oil circulation pipe is connected with oil circulating pump, oil circulating pump is opened with insulation electromagnetically operated valve, under the effect of oil circulating pump, transformer oil in oil tank of transformer upper chamber enters the lower cavity of oil tank of transformer by transformer oil circulation pipe, transformer oil in lower cavity enters upper chamber, transformer oil iterative cycles in upper and lower cavity, keep oil temperature balanced.
As preferably, before liquid nitrogen pours, liquid towards nitrogenous hood vacuumizes.Vacuumize and can remove incoagulable gas in casing or pipeline and moisture, improve refrigeration, the input of liquid nitrogen can be reduced simultaneously, reduce production cost.According to needs of production, the vacuum degree vacuumized should be determined.
As preferably, described gas nitrogen outlet is provided with triple valve, and wherein two valve ports are connected with gas nitrogen outlet, and another one valve port is the unidirectional valve be communicated with liquid nitrogenous hood.Affect by various factors, in liquid nitrogenous hood, still there will be a small amount of gaseous nitrogen, by unidirectional valve, these gaseous nitrogens are discharged.
As preferably, tank wall or the tube wall of liquid nitrogenous hood, gas nitrogen outlet and liquid nitrogen extraction tube all have three layers, nexine and outerly to make by stainless steel alloy, and intermediate layer is filled with insulation material.Liquid nitrogenous hood, gas nitrogen outlet and liquid nitrogen extraction tube are all filled with insulation material, and insulation material can reduce the heat exchange in case or pipe and the external world, at utmost improves heat exchanger effectiveness.
As preferably, described insulation material is that mineral wool or water are cotton.Mineral wool or water Cottonopolis are good insulation materials, and cost is lower.
As preferably, described liquid nitrogenous hood is provided with liquid nitrogen filling opening.Liquid nitrogen filling opening is used for pouring or regularly replacing liquid nitrogen.
Therefore, the invention has the beneficial effects as follows: 1), liquid nitrogenous hood pours liquid nitrogen, and carry out heat exchange by liquid nitrogen and transformer oil, heat exchanger effectiveness is high, reaches the object of cooling; 2), gaseous nitrogen through liquid nitrogen compressor and condenser, be again converted into liquid nitrogen, and pour liquid nitrogenous hood by choke valve, recycle; 3), oil tank of transformer passes through external transformer oil circulation pipe and oil circulating pump, the transformer oil iterative cycles in upper and lower cavity, the equilibrium of maintenance oil temperature.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of overall structure schematic diagram of the present invention;
Accompanying drawing 2 is the partial enlarged drawings at A place in accompanying drawing 1;
Accompanying drawing 3 is sectional drawings of liquid nitrogen extraction tube in the present invention.
Shown in figure: the liquid nitrogenous hood of 1-oil tank of transformer, 2-, 3-liquid nitrogen extraction tube, 4-gas nitrogen outlet, 5-evaporation tube, 6-liquid nitrogen compressor, 7-condenser, 8-choke valve, 9-temperature inductor, 10-are incubated electromagnetically operated valve, 11-transformer oil circulation pipe, 12-oil circulating pump, 13-triple valve, 14-insulation material, 15-liquid nitrogen filling opening.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
As shown in Figure of description 1, the strong cold transformer of a kind of liquid nitrogen, comprise the oil tank of transformer 1 that transformer oil is housed, iron core is provided with in oil tank of transformer 1, iron core is externally connected to Transformer Winding coil, it also comprises the liquid nitrogenous hood 2 that liquid nitrogen is housed, liquid nitrogenous hood 2 is connected with liquid nitrogen extraction tube 3, oil tank of transformer 1 is connected with gas nitrogen outlet 4, evaporation tube 5 is had along cabinet wall coiling in oil tank of transformer 1, evaporation tube 5 is positioned at the bottom of oil tank of transformer 1, one end of evaporation tube 5 is communicated with liquid nitrogen extraction tube 3, the other end is communicated with gas nitrogen outlet 4, gas nitrogen outlet 4 is provided with liquid nitrogen compressor 6 successively, condenser 7 and choke valve 8, the end of gas nitrogen outlet 4 stretches into the inside of liquid nitrogenous hood 2, temperature inductor 9 is provided with in oil tank of transformer 1, temperature inductor 9 is transducer, liquid nitrogen extraction tube 3 is provided with the insulation electromagnetically operated valve 10 be electrically connected with temperature inductor 9, the outside of oil tank of transformer 1 is provided with transformer oil circulation pipe 11, one end of transformer oil circulation pipe 11 is communicated with the upper chamber of oil tank of transformer 1, the other end is communicated with the lower cavity of oil tank of transformer 1, transformer oil circulation pipe 11 is provided with oil circulating pump 12, oil circulating pump 12 is electrically connected with insulation electromagnetically operated valve 10, gas nitrogen outlet 4 is provided with triple valve 13, wherein two valve ports are connected with gas nitrogen outlet 4, another one valve port is the unidirectional valve be communicated with liquid nitrogenous hood 2, as shown in Figure of description 2, the tank wall of liquid nitrogenous hood 2 has three layers, nexine and skin are made by stainless steel alloy, intermediate layer is filled with insulation material 14, as shown in Figure of description 3, the tube wall of gas nitrogen outlet 4 and liquid nitrogen extraction tube 3 has three layers, nexine and skin are made by stainless steel alloy, intermediate layer is filled with insulation material 14, insulation material 14 is that mineral wool or water are cotton, liquid nitrogenous hood 2 is provided with liquid nitrogen filling opening 15.
Coolant by conventional liquid water, is replaced with liquid nitrogen by the present invention, because the temperature of liquid nitrogen is at subzero-196 degree, boiling point-195.8 is spent, critical temperature-147 is spent, and critical pressure 3.39Mpa, compared with aqueous water, liquid nitrogen has very low temperature, better can absorb heat in cooling procedure, heat exchanger effectiveness is higher, and cooling time is short, in addition the characteristic of liquid nitrogen be colorless and odorless, nonflammable, can not explode, be the more satisfactory coolant of transformer oil.
The cooling means of the strong cold transformer of this liquid nitrogen, comprise following use procedure, wherein the traffic direction of liquid nitrogen, gaseous nitrogen is as shown in the direction of arrow in Figure of description 1: a, serviceability temperature according to transformer oil, the predetermined value of design temperature inductor 9, after in oil tank of transformer 1, temperature reaches preset temperature, temperature inductor 9 sends signal, and after Received signal strength, insulation electromagnetically operated valve 10, liquid nitrogen compressor 6 and condenser 7 start simultaneously; Liquid nitrogen in b, liquid nitrogenous hood 2 flows into liquid nitrogen extraction tube 3, and enters in evaporation tube 5, and the liquid nitrogen in evaporation tube 5 absorbs the heat of transformer oil, vaporization reaction occurs and is converted into gaseous nitrogen; C, gaseous nitrogen enter gas nitrogen outlet 4, and gaseous nitrogen stream, through triple valve 13, enters liquid nitrogen compressor 6, and enter condenser 7 after compression again and cool, gaseous nitrogen is reduced to liquid nitrogen, and enter in liquid nitrogenous hood 2 through choke valve 8; D, repeat above a, b, c tri-steps, liquid nitrogen repetitive cycling utilizes, until the oil temperature in oil tank of transformer 1 is in the temperature range of regulation.
When above-mentioned b, step c are carried out, oil circulating pump 12 can be opened with insulation electromagnetically operated valve 10, under the effect of oil circulating pump 12, transformer oil in oil tank of transformer 1 upper chamber enters the lower cavity of oil tank of transformer 1 by transformer oil circulation pipe 11, transformer oil in lower cavity enters upper chamber, transformer oil iterative cycles in upper and lower cavity, keeps oil temperature balanced.
In the strong cold process of liquid nitrogen, affect by various factors, in liquid nitrogenous hood, a small amount of gaseous nitrogen may be occurred, at this moment by unidirectional valve, these gaseous nitrogens are discharged.In addition can before liquid nitrogen pour, liquid towards nitrogenous hood vacuumizes.Vacuumize and can remove incoagulable gas in casing or pipeline and moisture, improve refrigeration, the input of liquid nitrogen can be reduced simultaneously, reduce production cost.
Should be understood that this embodiment is only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Claims (1)
1. the strong cold transformer of liquid nitrogen, comprise the oil tank of transformer (1) that transformer oil is housed, oil tank of transformer is provided with iron core in (1), iron core is externally connected to Transformer Winding coil, it is characterized in that, it also comprises the liquid nitrogenous hood (2) that liquid nitrogen is housed, liquid nitrogenous hood (2) is connected with liquid nitrogen extraction tube (3), oil tank of transformer (1) is connected with gas nitrogen outlet (4), evaporation tube (5) is had along cabinet wall coiling in oil tank of transformer (1), one end of evaporation tube (5) is communicated with liquid nitrogen extraction tube (3), the other end is communicated with gas nitrogen outlet (4), gas nitrogen outlet (4) is provided with successively liquid nitrogen compressor (6), condenser (7) and choke valve (8), the end of gas nitrogen outlet (4) stretches into the inside of liquid nitrogenous hood (2), temperature inductor (9) is provided with in oil tank of transformer (1), liquid nitrogen extraction tube (3) is provided with the insulation electromagnetically operated valve (10) be electrically connected with temperature inductor (9),
The outside of described oil tank of transformer (1) is provided with transformer oil circulation pipe (11), one end of transformer oil circulation pipe (11) is communicated with the upper chamber of oil tank of transformer (1), the other end is communicated with the lower cavity of oil tank of transformer (1), and transformer oil circulation pipe (11) is provided with oil circulating pump (12);
Described gas nitrogen outlet (4) is provided with triple valve (13), and wherein two valve ports are connected with gas nitrogen outlet (4), and another one valve port is the unidirectional valve be communicated with liquid nitrogenous hood (2);
Tank wall or the tube wall of liquid state nitrogenous hood (2), gas nitrogen outlet (4) and liquid nitrogen extraction tube (3) all have three layers, and nexine and skin are made by stainless steel alloy, and intermediate layer is filled with insulation material (14);
Described insulation material (14) is mineral wool or water cotton;
Described liquid nitrogenous hood (2) is provided with liquid nitrogen filling opening (15);
The cooling means being applicable to the strong cold transformer of liquid nitrogen comprises following use procedure:
A), according to the serviceability temperature of transformer oil, the predetermined value of design temperature inductor (9), after oil tank of transformer (1) interior temperature reaches preset temperature, temperature inductor (9) sends signal, after Received signal strength, insulation electromagnetically operated valve (10), liquid nitrogen compressor (6) and condenser (7) start simultaneously;
B) liquid nitrogen, in liquid nitrogenous hood (2) flows into liquid nitrogen extraction tube (3), and enter in evaporation tube (5), liquid nitrogen in evaporation tube (5) absorbs the heat of transformer oil, vaporization reaction occurs and is converted into gaseous nitrogen;
C), gaseous nitrogen enters liquid nitrogen compressor (6) by gas nitrogen outlet (4), enter condenser (7) cooling after compression again, gaseous nitrogen is reduced to liquid nitrogen, and enters in liquid nitrogenous hood (2) through choke valve (8);
D), repeat above a, b, c tri-steps, liquid nitrogen repetitive cycling utilizes, until the oil temperature in oil tank of transformer (1) is in the temperature range of regulation;
Oil circulating pump (12) is opened with insulation electromagnetically operated valve (10), under the effect of oil circulating pump (12), transformer oil in oil tank of transformer (1) upper chamber enters the lower cavity of oil tank of transformer (1) by transformer oil circulation pipe (11), transformer oil in lower cavity enters upper chamber, transformer oil iterative cycles in upper and lower cavity, keeps oil temperature balanced.
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| CN201310312188.9A CN103390485B (en) | 2013-07-22 | 2013-07-22 | A kind of strong cold transformer of liquid nitrogen and refrigerating method thereof |
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| CN201310312188.9A CN103390485B (en) | 2013-07-22 | 2013-07-22 | A kind of strong cold transformer of liquid nitrogen and refrigerating method thereof |
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| CN103390485B true CN103390485B (en) | 2015-12-09 |
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| JPS59222911A (en) * | 1983-06-01 | 1984-12-14 | Kansai Electric Power Co Inc:The | Gas insulated electrical apparatus |
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| CN103390485A (en) | 2013-11-13 |
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Address after: 324104, Jiang He industrial corridor No. 137, Qing Lake junction, Jiangshan, Zhejiang, Quzhou Applicant after: Zhejiang Proview Electric Applicance Co., Ltd Address before: 324100, Jiang He industrial corridor No. 137, Qing Lake junction, Jiangshan, Zhejiang, Quzhou Applicant before: Zhejiang Jiangshan Special Transformer Co., Ltd. |
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Effective date of registration: 20170912 Address after: 072750, Hebei, Baoding, Jianshe Road 111 Zhuozhou 197 celebrities, a product No. 1 building, unit 2002, room 1 Patentee after: Wang Wenzhong Address before: 324104, Jiang He industrial corridor No. 137, Qing Lake junction, Jiangshan, Zhejiang, Quzhou Patentee before: Zhejiang Proview Electric Applicance Co., Ltd |
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