CN203336936U - Damp-proof device of separated-phase closed buses - Google Patents
Damp-proof device of separated-phase closed buses Download PDFInfo
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- CN203336936U CN203336936U CN2013202889162U CN201320288916U CN203336936U CN 203336936 U CN203336936 U CN 203336936U CN 2013202889162 U CN2013202889162 U CN 2013202889162U CN 201320288916 U CN201320288916 U CN 201320288916U CN 203336936 U CN203336936 U CN 203336936U
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Abstract
The utility model relates to a damp-proof device of separated-phase closed buses in the power industry, in particular to a circulation drying device of the separated-phase closed buses. The damp-proof device of the separated-phase closed buses comprises the three phases of separated-phase closed buses horizontally arranged side by side, shells of the three phases of separated-phase closed buses are connected with the circulation drying device through pipelines, the circulation drying device is connected with a circulation drying control device, a moisture detection device is arranged in each shell of the three phases of separated-phase closed buses, and outside the shells of the three phases of separated-phase closed buses, the circulation drying control device is connected with the moisture detection devices through a moisture control system. The damp-proof device of the separated-phase closed buses not only resolves the problem that the insulation performance of the separated-phase closed buses in the damp environment is lowered, but also flexibly changes the work modes of equipment according to the variation of the climate or weather, effectively prolongs the service life of the equipment, improves the adaptability of the equipment to the environment, and guarantees normal and safe operation of the power plant equipment.
Description
Technical field
The utility model relates to a kind of isolated-phase enclosed bus damp-proof device in power industry, particularly a kind of isolated-phase enclosed bus circulation drier.
Background technology
Along with the development of power industry, generating set capacity constantly increases, and isolated-phase enclosed bus is also more and more applied in power plant.The characteristics such as for many years, isolated-phase enclosed bus is little with its simple installation, operation maintenance workload, the steel construction heating is few are subject to user's welcome.But, because isolated-phase enclosed bus is the space of a sealing, when air humidity is excessive, the inner dewfall phenomenon that easily produces of isolated-phase enclosed bus, thereby reduce the insulating properties of bus, the special thermal power plant for coastal cities, or the larger city of air humidity, even may bring out the single-phase earthing accident, bring hidden danger to the safe operation of power plant.
The shell of isolated-phase enclosed bus is one and seals independently space, and when unit operation, bus temperature can reach 75～83 ℃, and skin temperature is 56～65 ℃.As the unit disorderly closedown; when orderly closedown or weather conditions change; bus and skin temperature fast-descending; saturated vapor pressure between bus and shell is fast-descending thereupon also; cause having aqueous water to separate out between bus and shell; metal shell inner surface and insulator surface at isolated-phase enclosed bus easily produce condensation, cause the decreasing insulating of equipment, affect the safe operation of thermal power plant.
The Chinese patent that application number is CN201220307163.0 discloses a kind of closed circulating dry system of isolated-phase enclosed bus, and described enclosed busbar includes A phase, B phase, C phase three-phase, and drying device reaches mutually C with A phase, B and is connected, and forms air circulation loop.Described drying device is from wherein a phase or two-phase enclosed busbar are blown into dry hot blast, after whole section enclosed busbar, by entering other two-phases or a phase enclosed busbar described communicating pipe, finally carry moisture, dust and return to dehumidifying in described drying device, heating, dedusting, enter again afterwards next circulation.This device passes through humidity sensing device, the PLC system is controlled the work of drying device, this device is the duty in being interrupted, if meet continuous rainy weather, as the plum rain season of the south of the lower reaches of the Yangtze River, now weather humidity is higher, phaseisolated bus easily makes moist because weather humidity is higher, drying device reduces the humidity in phaseisolated bus through several cycle periods, until be down in institute's standard humidity scope, drying device can quit work.In humidity under higher working environment, drying device can suspend a moment before entering next circulation again, and drying device under this kind of pattern " startup " and " stopping " switching are more frequent, cause phaseisolated bus inner than contacting more frequently wet environment, can affect the insulating properties of phaseisolated bus enclosure interior conductor, and then affect its security performance.
Given this, the utility model is proposed.
The utility model content
The utility model provides a kind of phaseisolated bus damp-proof device, this device can be according to the variation of weather, be particularly related to a kind of isolated-phase enclosed bus circulation drier, not only solved the problem that in the power plant, isolated-phase enclosed bus makes moist, and can, according to weather conditions, make circulation drier there is optionally operation automatically.
For realizing this utility model purpose, the utility model adopts following technical scheme:
A kind of isolated-phase enclosed bus damp-proof device, comprise three phase and isolated-phase enclosed bus that level is placed side by side, wherein every phase and isolated-phase enclosed bus comprises the conductor of isolated-phase enclosed bus housing and enclosure interior, it is characterized in that: three phase and isolated-phase enclosed bus housings connect circulation drier by pipeline, circulation drier connects the cyclic drying control device, be provided with humidity detector in every phase housing of three phase and isolated-phase enclosed bus, be connected by MCS between three phase and isolated-phase enclosed bus housing outer circulation apparatus for control of drying and humidity detector.
Further, on the end face of described three phase and isolated-phase enclosed bus housing the same sides, be respectively arranged with pore, be welded with respectively tracheae on pore; Circulation drier aspirating hole and circulation drier air admission hole are set on described circulation drier, on circulation drier aspirating hole and circulation drier air admission hole, are welded with respectively exhaust tube and air inlet pipe; Described pipeline comprises pump-line and admission line, pump-line one end is connected with the exhaust tube of circulation drier, the other end and one in three phase and isolated-phase enclosed bus mutually or the tracheae on the housing of two-phase be connected, admission line one end is connected with the air inlet pipe of circulation drier, and the other end is connected with other two-phase in three phase and isolated-phase enclosed bus or the tracheae of a phase.
Further, described pump-line one end and exhaust tube to be connected with the other end and being connected of tracheae be that flange is connected, described admission line one end is connected with the other end and being connected of tracheae with air inlet pipe be that flange is connected.
Further, on the end face of the other side of described three phase and isolated-phase enclosed bus, the connection pore is set respectively, on the connection pore, is welded with and makes three phase and isolated-phase enclosed bus be communicated with communicating pipe.
Further, described MCS comprises humidity controller and control panel, control panel is connected with humidity controller, described humidity detector and MCS be connected to being connected of humidity detector and humidity controller, described cyclic drying control device and MCS be connected to being connected of cyclic drying control device and humidity controller.
Further, be provided with automatic switch and hand switch on described control panel, described humidity controller and being connected of control panel be humidity controller respectively with being connected of automatic switch and hand switch.
Further, described circulation drier is roots blower.
Further, described cyclic drying control device is programmable logic controller (PLC).
Further, described humidity detector is humidity sensor.
Further, described flange is a kind of in slip-on-welding plate flange and hubbed clip-on-welding flange.
Below the utility model is described further:
A kind of isolated-phase enclosed bus damp-proof device, comprise three phase and isolated-phase enclosed bus that level is placed side by side, and wherein every phase and isolated-phase enclosed bus comprises the conductor of isolated-phase enclosed bus housing and enclosure interior.Three phase and isolated-phase enclosed bus housings connect circulation drier by pipeline, circulation drier connects the cyclic drying control device, be provided with humidity detector in every phase housing of three phase and isolated-phase enclosed bus, wherein, moisture detector is humidity sensor, and the larger position of air flow rate in three phase and isolated-phase enclosed bus should be avoided in the installation site of moisture detector.Outside three phase and isolated-phase enclosed bus housings, between cyclic drying control device and humidity detector, MCS is set, humidity conditioner one end is connected with circulation drier, and the other end is connected with the humidity detector in the isolated-phase enclosed bus housing.
On the same side end face of the three phase and isolated-phase enclosed bus housings of placing side by side in level, pore is set respectively, is provided with tracheae on pore, wherein, tracheae is welded on pore.Circulation drier aspirating hole and circulation drier air admission hole are set on circulation drier, on circulation drier aspirating hole and circulation drier air admission hole, exhaust tube and air inlet pipe are set respectively, wherein, exhaust tube and air inlet pipe are to be welded on respectively on circulation drier aspirating hole and circulation drier air admission hole.Three phase and isolated-phase enclosed bus housings connect circulation drier by pipeline, wherein, pipeline comprises pump-line and admission line, one end of pump-line is connected with the exhaust tube of circulation drier, the other end is connected with a phase of three phase and isolated-phase enclosed bus housings or the tracheae of two-phase, one end of air inlet pipe is connected with the air inlet pipe of circulation drier, and the other end is connected with the tracheae of the other two-phase of three phase and isolated-phase enclosed bus housings or a phase.
One end of pump-line was connected with a phase of three phase and isolated-phase enclosed bus housings or the flange that is connected to of two-phase tracheae with being connected with the other end of the exhaust tube of circulation drier, being connected of the tracheae that is connected the two-phase remaining with three phase and isolated-phase enclosed bus housings with the other end or a phase of one end of admission line and the air inlet pipe of circulation drier being flange is connected, wherein, described flange is a kind of in slip-on welding flange and hubbed clip-on-welding flange, preferably hubbed clip-on-welding flange.Welded flange on tracheae on three phase and isolated-phase enclosed bus housings, all weld upper flange at the two ends of pump-line and admission line, at exhaust tube and the air inlet pipe welded flange of circulation drier.The flange of pump-line one end is docked with the flange of circulation drier exhaust tube, the other end and three phase and isolated-phase enclosed bus housings one mutually or the flange welded on two-phase dock, the flange of admission line one end docks with the flange of circulation drier air inlet pipe, the other end docks with the flange that the other two-phase of three phase and isolated-phase enclosed bus housings or is above welded mutually, wherein, all flange docking are all fixed with bolt.
On another end face of three phase and isolated-phase enclosed bus housings, the connection pore is set respectively, wherein, being communicated with on pore the three phase and isolated-phase enclosed bus housings connections that make communicating pipe of welding " E " type, forms air loop.
Be arranged on the cyclic drying control device and comprise humidity controller and the control panel be connected with humidity controller with the MCS between humidity detector, wherein, humidity detector is connected with humidity controller, and circulation drier is connected with humidity controller.
Flexible switching for ease of equipment operating mode is provided with automatic switch and hand switch on control panel, and wherein automatic switch is connected with humidity controller respectively with hand switch.
With three direct-connected circulation driers of isolated-phase enclosed bus be roots blower, roots blower is the air in the cyclic drying isolated-phase enclosed bus more promptly.Roots blower rated power used is 8kW, and input air pressure is 0.2～0.6MPa, and output pressure is 300～2500Pa, and flow of aerating air is 30m
3/ h.When in phaseisolated bus, humidity is too high, the bleeding point of circulation drier is extracted air in three phase and isolated-phase enclosed bus out, and fill into a small amount of air from air taking port, send into again in phaseisolated bus, so go round and begin again, make the moisture in bus fewer and feweri, relative humidity constantly reduces, dew-point temperature also descends thereupon, thereby guarantees the safe and reliable operation of enclosed busbar.
Being used for controlled circulation drying device and cyclic drying control device direct-connected with it is programmable logic controller (PLC), that is: the PLC controller.Programmable logic controller (PLC) is connected with humidity controller, can identify the signal that humidity controller sends, through the direct operational mode of controlled circulation drying device of its analyzing and processing.
This device can, according to ruuning situation and weather condition, be selected manual work pattern or automatic operation mode flexibly.When low, while adopting automatic mode, press the automatic switch of control panel when the normal operation of unit and air humidity, operational mode is opened automatically.Under this pattern, after humidity controller receives signal, pass to humidity sensor, humidity sensor collects the humidity parameter in three phase and isolated-phase enclosed bus, through the humidity value of humidity controller and setting, compares.When measured value is greater than, setting value is upper prescribes a time limit; send control signal by humidity controller to programmable logic controller (PLC); after the programmable logic controller (PLC) analyzing and processing, the controlled circulation drying device puts into operation automatically; whether again detect the interior air dew point temperature of isolated-phase enclosed bus or relative humidity after the full one-period of operation lower than the setting value lower limit; if lower than lower limit; out of service, otherwise continue the operation one-period, until in bus, the air parameter value is shut down lower than the setting value lower limit.The duty of equipment in being interrupted, the equipment power dissipation under holding state is very low, can be energy-conservation, also be conducive to the service life of extension device.When unit does not start and during continuous rainy weather, can adopt manual work pattern, press the hand switch of control panel, measure the humidity value of three phase and isolated-phase enclosed bus inside by humidity controller controlled humidity checkout gear, standard humidity value through humidity controller and setting compares, regardless of the result compared, programmable logic controller (PLC) all adopts the manual work program, carries out manual work pattern signal controlling circulation drier and keeps continuously running duty.Under this mode of operation, the self-operating of device circulation is carried out automatically, and circulation drier moves continuously, its unlatching or stop by Artificial Control, and the air humidity in isolated-phase enclosed bus can maintain very low state.
The utility model connects circulation drier at three phase and isolated-phase enclosed bus housings by pipeline, circulation drier connects the cyclic drying control device, be provided with humidity detector in every phase housing of three phase and isolated-phase enclosed bus, be connected by MCS between three phase and isolated-phase enclosed bus housing outer circulation apparatus for control of drying and humidity detector.This device can, according to the variation of weather or weather, be selected needed mode of operation.When automatic mode is applicable to the low and unit of air humidity and normally moves, the humidity value that humidity sensor under automatic mode in phaseisolated bus collects in isolated-phase enclosed bus compares through humidity controller, when being greater than the standard value set, by the PLC controls circulation drier, put into operation.Manual mode is applicable to before unit starting or rainy weather continuously, circulation drier continuous service now, and the air humidity in isolated-phase enclosed bus can maintain very low state.The utility model has not only thoroughly solved the insulation of isolated-phase enclosed bus under the wet environment condition and has reduced problem, and can be according to the variation of weather or weather, flexible variation device mode of operation, arranged the service life of utilizing extension device, improve the adaptability of equipment to environment, guaranteed the normal and safe operation of electric power factory equipment.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is control module schematic diagram of the present utility model.
The main element explanation:
1-isolated-phase enclosed bus A phase, 2-isolated-phase enclosed bus B phase, 3-isolated-phase enclosed bus C phase, 4-tracheae, 5-air inlet pipe, 6-exhaust tube, 7-admission line, 8-pump-line, the 9-circulation drier, 10-cyclic drying control device, 11-humidity controller, 12-control panel.
The specific embodiment
Below in conjunction with embodiment, the utility model is described in more detail.
As shown in Figure 1, a kind of isolated-phase enclosed bus damp-proof device, comprise three phase and isolated-phase enclosed bus that level is placed side by side, it is respectively isolated-phase enclosed bus A phase 1, isolated-phase enclosed bus B phase 2, isolated-phase enclosed bus C phase 3, wherein every phase and isolated-phase enclosed bus comprises the conductor of isolated-phase enclosed bus housing and enclosure interior.Three phase and isolated-phase enclosed bus housings connect circulation drier 9 by pipeline, circulation drier 9 connects cyclic drying control device 10, described circulation drier 9 is roots blower, and cyclic drying control device 10 is programmable logic controller (PLC), that is: the PLC controller.In isolated-phase enclosed bus A phase 1, isolated-phase enclosed bus B phase 2, be provided with humidity detector in every phase housing of isolated-phase enclosed bus C phase 3, and wherein, moisture detector is humidity sensor.Outside three phase and isolated-phase enclosed bus housings, between cyclic drying control device 10 and humidity detector, by MCS, be connected.
The isolated-phase enclosed bus A phase 1 of placing side by side in level, arrange respectively pore on housing the same side end face of isolated-phase enclosed bus B phase 2 and isolated-phase enclosed bus C phase 3, is welded with respectively tracheae 4 on pore.Be respectively arranged with circulation drier aspirating hole and circulation drier air admission hole on circulation drier 9, weld respectively exhaust tube 6 and air inlet pipe 5 on circulation drier aspirating hole and circulation drier air admission hole.Pipeline between three phase and isolated-phase enclosed bus and circulation drier 9 comprises pump-line 8 and admission line 7, one end of pump-line 8 is connected with the exhaust tube 6 of circulation drier 9, the other end with in three phase and isolated-phase enclosed bus one mutually or the tracheae 4 on the housing of two-phase be connected, one end of air inlet pipe 5 is connected with the air inlet pipe 5 of circulation drier 9, the other end is connected with the other two-phase of three phase and isolated-phase enclosed bus or the tracheae 4 of a phase, wherein, described pump-line 8 and admission line 7 and tracheae 4, exhaust tube 6, the connection of air inlet pipe 5 is flange and connects, described flange is a kind of in slip-on welding flange and hubbed clip-on-welding flange, preferred hubbed clip-on-welding flange.In isolated-phase enclosed bus A phase 1, on the end face of an other side of the housing of isolated-phase enclosed bus B phase 2 and isolated-phase enclosed bus C phase 3, the connection pore is set respectively, on the connection pore, welding makes isolated-phase enclosed bus A phase 1 communicating pipe, isolated-phase enclosed bus B phase 2 and isolated-phase enclosed bus C 3 housing mutually are communicated with, and form air loop.
The MCS arranged between cyclic drying control device 10 and humidity detector comprises humidity controller 11 and the control panel 12 be connected with humidity controller 11, humidity controller 11 1 ends are connected with cyclic drying control device 10, and the other end is connected with the humidity detector in the isolated-phase enclosed bus housing.Be provided with automatic switch and hand switch on control panel 12, automatic switch is connected with humidity controller 11 respectively with hand switch.
This device can, according to weather condition and ruuning situation, be selected manual work pattern or automatic operation mode flexibly.When air humidity is low and unit while normally moving, adopt automatic operation mode, press the automatic switch on control panel 12, humidity parameter in three phase and isolated-phase enclosed bus that now humidity controller 11 controlled humidity checkout gears gather, feed back to humidity controller 11 by the humidity data collected again and compare with the standard humidity value of setting.When measured value is greater than, setting value is upper prescribes a time limit, and cyclic drying control device 10 receives the signal of humidity controller 11, and now, cyclic drying control device 10 adopts the programme-control circulation drier 9 under automatic modes to put into operation.Circulation drier 9 at first by with one in three phase and isolated-phase enclosed bus mutually or two aspirating holes that are connected 6 the air in isolated-phase enclosed bus together with steam, dust is extracted out, the air admission hole be connected by the other two-phase or with in three phase and isolated-phase enclosed bus again blasts hot-air in three phase and isolated-phase enclosed bus, again detect the humidity value in three phase and isolated-phase enclosed bus by humidity controller 11 controlled humidity checkout gears after the full circulation of operation like this, whether the humidity value recorded is fed back to humidity controller 11 detections lower than the lower limit set value, if lower than lower limit, out of service by cyclic drying control device 10 controlled circulation drying devices 9, otherwise continue the operation one-period by cyclic drying control device 10 controlled circulation drying devices 9, until the humidity parameter value in isolated-phase enclosed bus is shut down lower than the setting value lower limit.Under automatic operation mode, the duty of circulation drier 9 in being interrupted, the equipment power dissipation under holding state is very low, can be energy-conservation, also be conducive to the service life of extension device.
Before unit starting or continuous rainy weather, as the yellow plum time, adopt manual work pattern, press the hand switch on control panel, humidity parameter in three phase and isolated-phase enclosed bus that now gathered by humidity controller 11 controlled humidity checkout gears, feed back to humidity controller 11 by the humidity data collected again and compare with the standard humidity value of setting.Regardless of the result compared, cyclic drying control device 10 all adopts the working procedure under manual work pattern, carries out manual work pattern signal controlling circulation drier 9 and puts into operation.At first circulation drier 9 is extracted the air in three phase and isolated-phase enclosed bus out by aspirating hole 6 together with steam, dust, blast hot-air by air admission hole 5 in three phase and isolated-phase enclosed bus again, again detect the humidity value in three phase and isolated-phase enclosed bus by humidity controller 11 controlled humidity checkout gears after the full circulation of operation like this, the humidity value recorded is fed back to humidity controller 11 and compare.Regardless of comparative result, cyclic drying control device 10 still adopts the still operation of programme-control circulation drier 9 under manual work pattern.Under this mode of operation, the self-operating circulation of device is carried out automatically, and circulation drier 9 operation continuously under cyclic drying control device 10 is controlled, its unlatching or stop by Artificial Control, adopt the air humidity in this kind of mode of operation three phase and isolated-phase enclosed bus can maintain very low state, so rain or air humidity when higher at continuous cloudy day, circulation drier 9 can continuous service, guaranteed that the isolated-phase enclosed bus enclosure interior is all the time in dry state, the insulating properties of isolated-phase enclosed bus inner member have been guaranteed, reduce the frequency of maintenance of electric power factory equipment, and then the lasting and safe operation of assurance electric power factory equipment.
The utility model has not only thoroughly solved the insulation of isolated-phase enclosed bus under the wet environment condition and has reduced problem, and can be according to the variation of weather or weather, flexible variation device mode of operation.Not only extend the service life of equipment, and improved the adaptability of equipment to environment, guaranteed the normal and safe operation of electric power factory equipment, and then improved runnability and the production efficiency of electric power factory equipment.
Embodiment in above-described embodiment can further combine or replace; and embodiment is described preferred embodiment of the present utility model; not design of the present utility model and scope are limited; under the prerequisite that does not break away from the utility model design philosophy; the various changes and modifications that in this area, the professional and technical personnel makes the technical solution of the utility model, all belong to protection domain of the present utility model.
Claims (10)
1. an isolated-phase enclosed bus damp-proof device, comprise three phase and isolated-phase enclosed bus that level is placed side by side, wherein every phase and isolated-phase enclosed bus comprises the conductor of isolated-phase enclosed bus housing and enclosure interior, it is characterized in that: three phase and isolated-phase enclosed bus housings connect circulation drier (9) by pipeline, circulation drier (9) connects cyclic drying control device (10), be provided with humidity detector in every phase housing of three phase and isolated-phase enclosed bus, between three phase and isolated-phase enclosed bus housing outer circulation apparatus for control of drying (10) and humidity detector, by MCS, be connected.
2. a kind of isolated-phase enclosed bus damp-proof device according to claim 1, is characterized in that: be respectively arranged with pore on the end face of described three phase and isolated-phase enclosed bus housing the same sides, be welded with respectively tracheae (4) on pore; Circulation drier aspirating hole and circulation drier air admission hole are set on described circulation drier (9), are welded with respectively exhaust tube (6) and air inlet pipe (5) on circulation drier aspirating hole and circulation drier air admission hole; Described pipeline comprises pump-line (8) and admission line (7), pump-line (8) one ends are connected with the exhaust tube (6) of circulation drier (9), the other end and one in three phase and isolated-phase enclosed bus mutually or the tracheae (4) on the housing of two-phase be connected, admission line (7) one ends are connected with the air inlet pipe (5) of circulation drier (9), and the other end is connected with other two-phase in three phase and isolated-phase enclosed bus or the tracheae (4) of a phase.
3. a kind of isolated-phase enclosed bus damp-proof device according to claim 2, it is characterized in that: described pump-line (8) one ends and exhaust tube (6) to be connected with the other end be that flange is connected with being connected of tracheae (4), it is that flange is connected with air inlet pipe (5) with being connected of tracheae (4) that described admission line (7) one ends are connected with the other end.
4. a kind of isolated-phase enclosed bus damp-proof device according to claim 2, it is characterized in that: be respectively arranged with the connection pore on the end face of the other side of described three phase and isolated-phase enclosed bus, on the connection pore, welding makes three phase and isolated-phase enclosed bus be communicated with communicating pipe.
5. a kind of isolated-phase enclosed bus damp-proof device according to claim 1, it is characterized in that: described MCS comprises humidity controller (11) and control panel (12), control panel (12) is connected with humidity controller (11), described humidity detector and MCS be connected to being connected of humidity detector and humidity controller (11), described cyclic drying control device (10) and MCS be connected to being connected of cyclic drying control device (10) and humidity controller (11).
6. a kind of isolated-phase enclosed bus damp-proof device according to claim 5, it is characterized in that: described control panel is provided with automatic switch and hand switch on (12), described humidity controller (11) and being connected of control panel (12) be humidity controller (11) respectively with being connected of automatic switch and hand switch.
7. a kind of isolated-phase enclosed bus damp-proof device according to claim 1 and 2, it is characterized in that: described circulation drier (9) is roots blower.
8. a kind of isolated-phase enclosed bus damp-proof device according to claim 1 or 5, it is characterized in that: described cyclic drying control device (10) is programmable logic controller (PLC).
9. a kind of isolated-phase enclosed bus damp-proof device according to claim 1 or 5, it is characterized in that: described humidity detector is humidity sensor.
10. a kind of isolated-phase enclosed bus damp-proof device according to claim 3 is characterized in that: described flange is a kind of in slip-on-welding plate flange and hubbed clip-on-welding flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202889162U CN203336936U (en) | 2013-05-24 | 2013-05-24 | Damp-proof device of separated-phase closed buses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202889162U CN203336936U (en) | 2013-05-24 | 2013-05-24 | Damp-proof device of separated-phase closed buses |
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| CN203336936U true CN203336936U (en) | 2013-12-11 |
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|---|---|---|---|
| CN2013202889162U Expired - Lifetime CN203336936U (en) | 2013-05-24 | 2013-05-24 | Damp-proof device of separated-phase closed buses |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322486A (en) * | 2015-10-15 | 2016-02-10 | 山东达驰阿尔发电气有限公司 | Air circulating drying device with enclosed busbar |
-
2013
- 2013-05-24 CN CN2013202889162U patent/CN203336936U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322486A (en) * | 2015-10-15 | 2016-02-10 | 山东达驰阿尔发电气有限公司 | Air circulating drying device with enclosed busbar |
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