CN104267759A - Temperature control heating device, temperature control method thereof and gas cylinder trolley - Google Patents
Temperature control heating device, temperature control method thereof and gas cylinder trolley Download PDFInfo
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- CN104267759A CN104267759A CN201410419655.2A CN201410419655A CN104267759A CN 104267759 A CN104267759 A CN 104267759A CN 201410419655 A CN201410419655 A CN 201410419655A CN 104267759 A CN104267759 A CN 104267759A
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Abstract
The invention discloses a temperature control heating device, a temperature control method of the temperature control heating device and a gas cylinder trolley, and relates to the technical field of temperature control heating. The main purpose is to meet the using requirement for normal filling SF6 gas or other gases in the low-temperature environment. According to the main technical scheme, the temperature control heating device comprises a body, a temperature control system and a power source. The body comprises an electric tracing conductor layer, fireproof felt layers and glass fiber silicon layers, the glass fiber silicon layers and the fireproof felt layers are arranged on the two sides of the electric tracing conductor layer respectively, and the glass fiber silicon layers are arranged on the outer sides of the two fireproof felt layers respectively. The temperature control system comprises a heat-sensitive probe and a temperature control device, the heat-sensitive probe is arranged between the electric tracing conductor layer and any fireproof felt layer, and the temperature control device is connected with the heat-sensitive probe; the power source is connected with the two conductor ends of the electric tracing conductor layer. According to the gas cylinder trolley, a trolley and the temperature control heating device are combined, so that heat preservation and heating of a gas cylinder are achieved in the filling, transporting and using processes. The gas cylinder trolley is mainly used for performing temperature control heating, transporting and filling on an SF6 gas cylinder and other gas cylinders.
Description
Technical field
The present invention relates to temperature and control technical field of heating, particularly relate to a kind of temperature control heating device and temperature control method thereof and use the gas cylinder handcart of this temperature control heating device.
Background technology
Current converting station high voltage electrical apparatus, as HGIS, GIS, potting breaker, column type circuit breaker etc., all adopt SF6 gas as insulating medium, need after high voltage electric equipment installation to carry out gas charge at the scene, reach the rated pressure of equipment requirement, usual rated pressure is between 0.5MP to 0.6MP, and according to the size of equipment air chamber, gas charge amount is different.Due to the process of SF6 gas charge process to be liquid conversion be gaseous state, need from surrounding air, absorb a large amount of heats in the process of conversion, usually cause residual gas in bottle to fill and to produce waste.
Existing GB Regulations and the typical construction method of State Grid Corporation of China, only illustrate and want slowly when gas charge, prevent gas cylinder body from freezing, forbid to use open firing gas cylinder simultaneously.But, in the working-yard of north of china in winter, be subzero about 10 degree during low temperature, even if inflate with very slow speed, also can freeze very soon around gas cylinder, cause heat normally not enter in bottle, in bottle, gas cannot reach filled pressure, usually causes residual gas in bottle to fill and to produce waste.
Inventor finds that above-mentioned existing airing form at least has following shortcoming: (1) inflation hourly velocity is slow, and inflationtime is long, once gas cylinder freezes, inflation cannot be carried out, and needs to wait for that ice could continue after melting, and inflationtime is long.As: western electric potting breaker one phase in Xi'an, gas capacity is about 200kg, and the time being filled to nominal pressure summer is continuously 10 hours.(2) construction in winter is influenced comparatively large, if power failure repairing work, and gas charge overlong time, the construction speed overall by impact.
Summary of the invention
In view of this, the invention provides a kind of temperature control heating device and temperature control method thereof and a kind of gas cylinder handcart.Fundamental purpose is to meet SF6 gas or other gas under low temperature environment and normally fills and use and do not produce waste.
For achieving the above object, the present invention mainly provides following technical scheme:
On the one hand, embodiments of the invention provide a kind of temperature control heating device, and this temperature control heating device comprises body, temperature control system and power supply, and described body comprises:
Electric tracing conductor layer;
Fire prevention carpet veneer, is separately positioned on the both sides of electric tracing conductor layer;
Glass silicon layer, is separately positioned on the outside of two described fire prevention carpet veneers;
Described temperature control system comprises:
Sensible heat is popped one's head in, and is arranged between electric tracing conductor layer and arbitrary fire prevention carpet veneer, for monitoring the temperature of electric tracing conductor layer;
Attemperating unit, pops one's head in described sensible heat and is connected, and for receiving the temperature that described sensible heat probe monitors arrives, and controls the electrical break-make of electric tracing conductor according to the temperature monitored;
Described power supply is connected with the conductor two ends of electric tracing conductor layer, provides electric energy for giving electric tracing conductor.
Aforesaid temperature control heating device also comprises: side hanging bag, is arranged on the outside of glass silicon layer, and described attemperating unit is installed in the hanging bag of described side.
Aforesaid temperature control heating device, described electric tracing conductor layer, fire prevention carpet veneer and glass silicon layer are stitched together.
Aforesaid temperature control heating device, described attemperating unit is provided with:
Temperature control burtons, for predetermined maximum temperature value and minimum temperature value; And
General supply button, for controlling unlatching or the cut out of described attemperating unit.
On the other hand, the embodiment of the present invention provides a kind of temperature control method of temperature control heating device, comprising:
The general supply button of opening temp. control heating arrangement, when sensible heat pop one's head in the temperature that senses be less than or equal to default minimum temperature value time, the electric tracing conductor of electric tracing conductor layer and power supply are electrically connected;
The general supply button of opening temp. control heating arrangement, when sensible heat pop one's head in the temperature sensed preset maximum temperature values and minimum temperature value between time, the electric tracing conductor of electric tracing conductor layer and power supply are electrically connected;
The general supply button of opening temp. control heating arrangement, when and sensible heat is popped one's head in, the temperature that senses is more than or equal to default maximum temperature values, the electric tracing conductor of electric tracing conductor layer and power supply electrically disconnect;
When general supply button cuts out, the electric tracing conductor of electric tracing conductor layer and power supply electrically disconnect.
The temperature control method of temperature control heating device, described temperature control heating device is the device described in above-mentioned any one.
On the other hand, embodiments of the invention additionally provide a kind of gas cylinder handcart, comprising:
Support, comprises at least one support bar;
Bracket, rack-mount by the first erection column, for supporting the body of arrangement gas cylinder thereon;
Back up pad, is arranged on pedestal lower end, for supporting the bottom of arrangement gas cylinder thereon;
Temperature control heating device described in above-mentioned any one, be provided with by the first erection column through hole, described temperature control heating device is by being arranged on described first erection column through hole;
Wherein, the width of described temperature control heating device matches with the length of gas cylinder body, the length of described temperature control heating device and all mates of gas cylinder body, and the two ends of described temperature control heating device arrange the bindiny mechanism that its two ends can be made to link together respectively.
Aforesaid gas cylinder handcart, this gas cylinder handcart also comprises holding card, the fixed band that described holding card comprises arcuate structure and is connected with the two ends of arcuate structure;
Described holding card is arranged on the upper of support by the second erection column, for supporting the body with fixed in position gas cylinder thereon;
What described temperature control heating device is provided with the second erection column passes hole.
Aforesaid gas cylinder handcart, described bindiny mechanism is the buckle or bonding subsides that cooperatively interact.
A kind of temperature control heating device that the embodiment of the present invention proposes and temperature control method and a kind of gas cylinder handcart at least have the following advantages:
A kind of temperature control heating device that the embodiment of the present invention provides, by fire prevention carpet veneer, glass silicon layer and electric tracing conductor, its structure and manufacture craft are comparatively simple, and it is outside that glass silicon layer can select glass silica gel cloth to be bonded at fire prevention carpet veneer, or stitching forms, glass silicon can be used between low temperature-70 DEG C to high temperature 300 DEG C, the resistance to ozone of glass silicon, oxygen, light and weathering aging, resistance to chemical attack, field uses weatherability excellent, long service life, the life-span can reach 10 years, has high insulating property; And carpet veneer of preventing fires can play fire prevention and insulation effect preferably.Ensure the heat radiation of temperature control heating device body evenly, and electric tracing conductor also ensure that temperature controls the security of heating, avoid heating-up temperature too low or too high and cause accident to occur.
Further, the temperature control method of temperature control heating device provided by the invention, by maximum temperature values and the minimum temperature value of setting, controls more safe and reliable to temperature, ensures that heated material maintains another stable temperature.
Further, embodiments of the invention solve SF6 gas charge overlong time for a long time, fill bottle in process and freeze, cannot the problem of normal construction.Particularly have a power failure for north of china in winter construction and rush to repair operation, greatly shorten power off time, ensure electric power netting safe running.
The gas cylinder handcart that embodiments of the invention provide, is effectively combined gas cylinder handcart with heating apparatus and temperature regulating device, the carrying of gas cylinder in convenient construction, reduces the handling of gas cylinder, heating operation simple and fast.
Accompanying drawing explanation
The structural representation of a kind of temperature control heating device that Fig. 1 provides for one embodiment of the invention;
The structural representation of the body that Fig. 2 provides for one embodiment of the invention;
Fig. 3 does not install the structural representation of temperature control heating device for a kind of gas cylinder handcart that one embodiment of the invention provides;
The structural representation of a kind of gas cylinder handcart installation temperature control heating device that Fig. 4 provides for one embodiment of the invention;
The temperature control heating device structural representation that a kind of and gas cylinder handcart that Fig. 5 provides for one embodiment of the invention matches.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1 and Figure 2, a kind of temperature control heating device that one embodiment of the present of invention propose, this temperature control heating device comprises body 1, temperature control system and power supply 3.Body 1 comprises: electric tracing conductor layer 4, fire prevention carpet veneer 5, glass silicon layer 6.Fire prevention carpet veneer 5 is separately positioned on the both sides of electric tracing conductor layer 4.Glass silicon layer 6 is separately positioned on the outside of two fire prevention carpet veneers 5.Temperature control system comprises: sensible heat probe 7 and attemperating unit 8.Sensible heat probe 7 is arranged between electric tracing conductor layer 4 and arbitrary fire prevention carpet veneer 5, for monitoring the temperature of electric tracing conductor layer 4; Attemperating unit 8 and sensible heat are popped one's head in and 7 to be connected, and for receiving the temperature that sensible heat probe 7 monitors, and control the electrical break-make of electric tracing conductor according to this temperature; Power supply 3 is connected with the conductor two ends of electric tracing conductor layer 4, provides power supply 3 for giving electric tracing conductor.
The temperature control heating device that the present embodiment provides, first fire prevention carpet veneer 5 is arranged in electric tracing conductor layer 4 both sides, for fire prevention and insulation, then outside fire prevention carpet veneer 5, glass silicon layer 6 is arranged, what take full advantage of that glass silicon materials have normally can work between high temperature 300 DEG C low temperature-70 DEG C, resistance to ozone, oxygen, light and weathering aging, resistance to chemical attack, field uses weatherability excellent, long service life, 10 years can be reached, and there is the features such as high insulating property, electric tracing conductor layer 4 can adopt the arrangement of wire in similar electric blanket, the mode that S type coils can be adopted, ensure that body 1 dispels the heat evenly, avoid amount of localized heat excessive or too small, and then ensure that temperature controls the safety and stability of heating, the too high accident that causes of local temperature is avoided to occur, or too low can not the realization of local temperature heats object.
Preferably, in one embodiment of the invention, this temperature control heating device further comprises side hanging bag 9, is arranged on the outside of glass silicon layer 6, and described attemperating unit 8 is installed in described side hanging bag 9.And power supply 3 is connected with attemperating unit 8, realizing temperature controlled to temperature control heating device while, make device overall, compact conformation, be more convenient for settling and moving.
Preferably, the described electric tracing conductor layer 4 of the temperature control heating device in above-described embodiment, fire prevention carpet veneer 5 and glass silicon layer 6 are stitched together.After stitching, multiple tracks line can be adopted, the parallel stitching of multiple row and surrounding sew up the mode combined, control electric tracing conductor between two suture lines, again relative displacement can not occur between each layer, the position of electric tracing conductor layer 4 in body 1 is relatively fixing, evenly lays, no matter how temperature control heating device moves or fold, all harmful effect can not be produced to temperature control heating effect.
Preferably, another embodiment of the present invention provides a kind of temperature control heating device, compared with above-described embodiment, the attemperating unit 8 in the present embodiment is provided with temperature control burtons 10 and general supply button 11.Temperature control burtons 10 is for predetermined maximum temperature value and minimum temperature value; General supply button 11 is for controlling unlatching or the cut out of attemperating unit 8.By temperature control burtons 10 regulate need maximum temperature values and minimum temperature value so that exceed this preset value make cut-out or open general supply 3.The setting of general supply button 11, ensures when not needing Heat preservation, and the general supply 3 of whole temperature control heating device is closed.Simultaneously the position corresponding with general supply button 11 arranges a pilot lamp, once general supply 3 is connected, this pilot lamp and shinny, after avoiding power supply 3 under maloperation to connect, staff does not find, and causes accident to produce.
Temperature control heating device in above-described embodiment is applied to the temperature control heating of SF6 gas cylinder, during use, body 1 is wrapped in SF6 gas cylinder periphery, maximum temperature values and minimum temperature value is regulated by temperature control burtons 10, then open general supply button 11, can realize being incubated the temperature control heating of SF6 gas cylinder.Control the temperature of electric tracing conductor layer 4, make it to maintain in a reasonable and safe level.
In actual use, sulfur hexafluoride gas cylinder volume is generally 40L, nominal operating pressure 12.5Mpa, and every bottle of sulfur hexafluoride gas inflation weight is about 50kg.Density is about 1250kg/m
3.The fluid density of sulfur hexafluoride gas is 1880kg/m
3, critical density is 736kg/m
3.
On the other hand, the temperature control heating device temperature control method that another embodiment of the present invention provides is as follows: the general supply button 11 of opening temp. control heating arrangement, when the temperature that sensible heat probe 7 senses is less than or equal to default minimum temperature value, electric tracing conductor and the power supply 3 of electric tracing conductor layer 4 are electrically connected.
The general supply button 11 of opening temp. control heating arrangement, when the temperature that sensible heat probe 7 senses is between the maximum temperature values preset and minimum temperature value, electric tracing conductor and the power supply 3 of electric tracing conductor layer 4 are electrically connected.
The general supply button 11 of opening temp. control heating arrangement, and when the temperature that sensible heat probe 7 senses is more than or equal to default maximum temperature values, the electric tracing conductor of electric tracing conductor layer 4 is not electrically connected with power supply 3.
When general supply button 11 cuts out, the electric tracing conductor of electric tracing conductor layer 4 is not electrically connected with power supply 3.
For ensureing construction safety, avoid over-heating, enable pressure in SF6 gas cylinder remain on gas cylinder and can bear in working pressure range, when air release to gas cylinder starts frosting, heating arrangement is opened, temperature regulating device temperature is arranged on temperature lower than powered operation when 65 degree, the power-off when temperature 70 degree.So electric tracing conductor selects the specification of maximum temperature 85 degrees Celsius, can construction safety be ensured and be unlikely to overheated to hurt sb.'s feelings.
Meanwhile, at the two ends of body 1, bindiny mechanism is installed, for after SF6 bottle wraps up by body 1, the two ends of body 1 is coupled together, to ensure closely to wrap up between body 1 and SF6 gas cylinder bottle, ensure heating and insulating efficiency.Glass silicon layer 6 has good anti-wear performance, because of gas cylinder appearance, major injury can not occur, can repeatedly use for a long time.
On the other hand, as shown in Fig. 3, Fig. 4, Fig. 5, another embodiment of the present invention additionally provides a kind of gas cylinder handcart, comprises support 12, bracket 13, back up pad 14 and the temperature control heating device described in above-mentioned any one.Wherein, support 12 comprises at least one back up pad 14.Bracket 13 is arranged on support 12 by the first erection column 15, for supporting the body of arrangement gas cylinder thereon.Back up pad 14 is arranged on support 12 lower end, for supporting the bottom of arrangement gas cylinder thereon.What temperature control heating device is provided with the first erection column 15 passes hole 17, and temperature control heating device is by being arranged on described first erection column 15 through hole 17.
Wherein, the width of temperature control heating device matches with the length of gas cylinder body, the length of temperature control heating device and all mates of gas cylinder body, and the two ends of temperature control heating device arrange the bindiny mechanism that its two ends can be made to link together respectively.
In above-described embodiment, gas cylinder handcart is effectively combined with heating apparatus and temperature regulating device, the carrying of gas cylinder in convenient construction, reduces the handling of gas cylinder, heating operation simple and fast.By realizing the connection of temperature control heating device and trolley miscellaneous part through hole 17, both ensure that the good package action of gas cylinder in body 1 pair of go-cart, and turn avoid when gas cylinder is placed and extruding force is produced to temperature control heating device, damage equipment.
Preferably, for making the simplification of gas cylinder handcart accessory, the feeder ear of temperature control heating device and output terminal all use socket or self-powered, avoid gas cylinder handcart to carry the carrying of long power lead and inconvenient gas cylinder.Electric tracing conductor uses 220V AC power 3.For heating blanket (body 1) being wrapped in gas cylinder surface during SF6 inflating gas cylinder, seal tight, regulate temperature required after switch on power 3, body heating blanket (body 1) is namely started working; Fill power-off only until gas in bottle, body heating blanket is finished the work.
Preferably, a kind of gas cylinder handcart that another embodiment of the present invention provides, compared with above-described embodiment, the gas cylinder handcart that the present embodiment provides also comprises holding card 18, the fixed band that described holding card 18 comprises arcuate structure and is connected with the two ends of arcuate structure, holding card 18 is arranged on the upper of support 12 by the second erection column 16, for supporting the body with fixed in position gas cylinder thereon.What temperature control heating device is provided with the second erection column 16 passes hole 17.Can determine according to the quantity of erection column in go-cart and position through the position in hole 17 and quantity.The setting of holding card 18 avoids gas cylinder bottle and shakes on gas cylinder handcart or tumble, and ensure that the security in transportation.After parcel body 1, holding card 18 is positioned at inside body 1.Due to the narrower in width of holding card 18, and holding card 18 preferably adopts the material of the good aluminium flake of heat-transfer effect etc., therefore less on the impact of heating uniformity.
Preferably, bindiny mechanism in above-described embodiment can select the realization such as buckle or bonding subsides that cooperatively interacts, and be specially, after double buckle is installed respectively in the two ends of body 1, bonding is pasted, after wrapping, fastened or bond, preferably can arrange multiple box corresponding with same sub-buckle, multiple box is in row arrangement, with the gas cylinder of satisfied different bottle diameter, bonding is pasted, and can adopt the bonding subsides sewed up and have certain length, can meet the complete tight parcel to different-diameter gas cylinder.
During use, by needing the gas cylinder used to remove on gas cylinder handcart, heating blanket (body) is surrounded gas cylinder, bonding double buckle or bonding are pasted, and are transported to working-yard; Regulate the power-off of electric blanket and restart temperature, switching on power and can start working, operating very easy, deenergization after inflation completes.
In sum, the temperature control heating device that the embodiment of the present invention provides generates heat evenly, has all weather operations performance, reliability is high, use fire-proof and water-proof, wear-resisting oxidation resistant material, long service life, design efforts would are little, easy construction is simple, and maintenance workload is little, increase automatic temperature-adjusting controls, and temperature control is accurately sensitive, simple to operate and continue to gas cylinder heat supply, reduce inflationtime and increase work efficiency.Gas cylinder handcart in the embodiment of the present invention is effectively combined with temperature control heating device body, temperature control equipment, for construction provides safety assurance, effectively prevent fire and occurs.
The temperature control heating device that the embodiment of the present invention provides, Temp. control method, and gas cylinder handcart, be applicable to the installation of electrical equipment construction that transformer station adopts SF6 medium, have alternating current 220V power supply, can ensure to fill continuously, gas cylinder does not freeze, and shortens infilling time, as: western electric potting breaker one phase in Xi'an, gas capacity is about 200kg, and the time being filled to nominal pressure summer continuously can shorten to 5 hours by original 10 hours.And security is high, adopt industrial heating tape to be heating material, increase temperature control equipment, carry out temperature adjustment according to the actual service condition in scene, reach assigned temperature temperature regulating device by automatic cut-off power, can not burn because of temperature is too high.Heating apparatus and temperature regulating device and gas bottle trolley are combined, constructability onsite moving and using fast.Select the laid length of heating tape according to site environment temperature, ensure that thermal value meets the demands.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (9)
1. a temperature control heating device, is characterized in that, this temperature control heating device comprises body, temperature control system and power supply, and described body comprises:
Electric tracing conductor layer;
Fire prevention carpet veneer, is separately positioned on the both sides of electric tracing conductor layer;
Glass silicon layer, is separately positioned on the outside of two described fire prevention carpet veneers;
Described temperature control system comprises:
Sensible heat is popped one's head in, and is arranged between electric tracing conductor layer and arbitrary fire prevention carpet veneer, for monitoring the temperature of electric tracing conductor layer;
Attemperating unit, pops one's head in described sensible heat and is connected, and for receiving the temperature that described sensible heat probe monitors arrives, and controls the electrical break-make of electric tracing conductor according to the temperature monitored;
Described power supply is connected with the conductor two ends of electric tracing conductor layer, provides electric energy for giving electric tracing conductor.
2. device according to claim 1, is characterized in that, described temperature control heating device also comprises:
Side hanging bag, is arranged on the outside of described glass silicon layer, and described attemperating unit is installed in the hanging bag of described side.
3. device according to claim 1, is characterized in that, described electric tracing conductor layer, fire prevention carpet veneer and glass silicon layer are stitched together.
4. device according to claim 1, is characterized in that, described attemperating unit is provided with:
Temperature control burtons, for predetermined maximum temperature value and minimum temperature value; And
General supply button, for controlling unlatching or the cut out of described attemperating unit.
5. a temperature control method for temperature control heating device, is characterized in that, comprising:
The general supply button of opening temp. control heating arrangement, when sensible heat pop one's head in the temperature that senses be less than or equal to default minimum temperature value time, the electric tracing conductor of electric tracing conductor layer and power supply are electrically connected;
The general supply button of opening temp. control heating arrangement, when sensible heat pop one's head in the temperature sensed preset maximum temperature values and minimum temperature value between time, the electric tracing conductor of electric tracing conductor layer and power supply are electrically connected;
The general supply button of opening temp. control heating arrangement, when sensible heat pop one's head in the temperature that senses be more than or equal to default maximum temperature values time, the electric tracing conductor of electric tracing conductor layer and power supply disconnect;
When general supply button cuts out, the electric tracing conductor of electric tracing conductor layer and power supply disconnect.
6. method according to claim 5, is characterized in that, described temperature control heating device is the device described in any one of claim 1-4.
7. a gas cylinder handcart, is characterized in that, described gas cylinder handcart comprises
Support, comprises at least one support bar;
Bracket, being installed on the bracket by the first erection column, is arcuate structure, for supporting the body of arrangement gas cylinder thereon;
Back up pad, is arranged on pedestal lower end, for supporting the bottom of arrangement gas cylinder thereon;
Temperature control heating device as described in any one of claim 1-4, be provided with by the first erection column through hole, described temperature control heating device is by being arranged on described first erection column through hole;
Wherein, the width of described temperature control heating device matches with the length of gas cylinder body, the length of described temperature control heating device and all mates of gas cylinder body, and the two ends of described temperature control heating device arrange the bindiny mechanism that its two ends can be made to link together respectively.
8. gas cylinder handcart according to claim 7, is characterized in that, described gas cylinder handcart also comprises holding card;
The fixed band that described holding card comprises arcuate structure and is connected with the two ends of described arcuate structure;
Described holding card is arranged on the upper of support by the second erection column, for supporting the body with fixed in position gas cylinder thereon;
What described temperature control heating device is provided with the second erection column passes hole.
9. gas cylinder handcart according to claim 7, is characterized in that, described bindiny mechanism is the buckle or bonding subsides that cooperatively interact.
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| CN201410419655.2A CN104267759B (en) | 2014-08-22 | 2014-08-22 | Temperature control heating device, temperature control method thereof and gas cylinder trolley |
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| CN106873657A (en) * | 2017-01-03 | 2017-06-20 | 钱东海 | For the pressure-measuring type heating controller and its control method of potting breaker |
| CN106873657B (en) * | 2017-01-03 | 2020-07-10 | 钱东海 | Control method of pressure measuring type heating controller for tank type circuit breaker |
| CN107864525A (en) * | 2017-11-24 | 2018-03-30 | 国网内蒙古东部电力有限公司 | The heater and method of a kind of GIS device |
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| CN104267759B (en) | 2017-02-15 |
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