CN105762737A - Micro-positive pressure system for separated-phase enclosed busbar and micro-positive pressure implementation method - Google Patents
Micro-positive pressure system for separated-phase enclosed busbar and micro-positive pressure implementation method Download PDFInfo
- Publication number
- CN105762737A CN105762737A CN201610221739.4A CN201610221739A CN105762737A CN 105762737 A CN105762737 A CN 105762737A CN 201610221739 A CN201610221739 A CN 201610221739A CN 105762737 A CN105762737 A CN 105762737A
- Authority
- CN
- China
- Prior art keywords
- positive pressure
- pressure
- micro
- enclosed busbar
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
Abstract
The invention relates to a micro-positive pressure system for a separated-phase enclosed busbar and a micro-positive pressure implementation method.The micro-positive pressure system comprises an air supply device, an oil removing device, a micro-positive pressure device, a high-pressure cooling tank and a three-phase enclosed busbar; an air outlet of the air supply device is connected with an air inlet of the oil removing device, an air outlet of the oil removing device is connected with a first air inlet of the micro-positive pressure device, an output port of the micro-positive pressure device is connected with an air inlet of the high-pressure cooling tank, an air outlet of the high-pressure cooling tank is connected with a second air inlet of the micro-positive pressure device, an air outlet of the micro-positive pressure device is connected with an air inlet of the three-phase enclosed busbar, and an air pressure sampling opening of the three-phase enclosed busbar is connected with a return air inlet of the micro-positive pressure device.A power plant air source or an oilless air compressor is adopted as the air supply device.According to the micro-positive pressure system for the separated-phase enclosed busbar and the micro-positive pressure implementation method, integral sealing can be conducted on the enclosed busbar of a power plant, and the micro-positive pressure capacity of the enclosed busbar is truly achieved.
Description
Technical field
The invention belongs to technical field of power generation, the pressure-fired system and the pressure-fired that are specifically related to a kind of isolated-phase enclosed bus realize method.
Background technology
At present, at home in the generating set in most thermal power plants, electromotor isolated-phase enclosed bus is widely used because having the advantage such as easy to use, steel construction generates heat less, security reliability is high, operation maintenance workload is relatively small and not affected by environment.Owing to isolated-phase enclosed bus is relative closure, when ambient temperature declines or load current reduction causes bus temperature to reduce, air pressure in enclosed busbar will reduce, moisture or dust etc. will suck in enclosed busbar from some leakage points with air, thus bringing potential safety hazard to the operation of enclosed busbar.
For preventing extraneous moisture, dust etc. from entering in enclosed busbar, people adopt pressure-fired aerating device to be filled with dry gas anhydrous, oil-free inside three-phase enclosed busbar simultaneously, the air pressure in enclosed busbar is made to form gas slightly above external atmosphere pressure, thus avoiding the moisture in the external world, dust, haze and industrial waste gas etc. to invade inside enclosed busbar, the generation of effective Restraining seal bus internal condensation, the hydrogen also being able to avoid electromotor to leak while preventing various flashover fault from occurring enters inside enclosed busbar.
In recent years, there is flashover fault in various degree in domestic many gencos isolated-phase enclosed bus, and tends to the situation that takes place frequently in succession, has had a strong impact on the safe and reliable operation of generating set.At present, enclosed busbar still suffers from many self problems and hidden danger, this " subhealth state " state of enclosed busbar, it is difficult to resist the weathers such as current high humidity, sleet, thick fog, haze and be continually changing adverse effect.Its major accident reason is owing to enclosed busbar body seal is not tight, causes that humid air causes internal serious condensation that flashover fault occurs after invading, or directly contributes shorted to earth accident after inner inlet.Although design in recent years, the isolated-phase enclosed bus manufactured have had some dewing-proof measures, such as there is the enclosed busbar of pressure-fired function, but due to poorly sealed, internal pressure keeps incessantly at all, the isolated-phase enclosed bus of more than 80% all can not normally use, it is slightly better that all the other isolated-phase enclosed bus of 20% are likely to sealing, substantially the pressure of a few minutes can be maintained, but need charger ceaselessly to work, the bus leak point found also can only carry out simple process by breaking fluid sealant, and after using some months, sealing property reduces or forfeiture.
The sealing problem of enclosed busbar has become the important restriction factor of the safe and stable operation of generating set.Trace it to its cause, mainly have following some: 1) disc insulator the most key in enclosed busbar seal structure and support insulator to seal the design of structure unreasonable.2) there are quality problems in enclosed busbar.3) the transit link existing problems of enclosed busbar.4) the in-site installation existing problems of enclosed busbar, enclosed busbar is formed by some sections, and in installation process, the shell between bus exists the problems such as omission weldering, sand holes, pore in welding process.
Summary of the invention
In order to solve the problems referred to above that prior art exists, the invention provides the pressure-fired system of a kind of isolated-phase enclosed bus and pressure-fired realizes method.
For achieving the above object, the present invention takes techniques below scheme: the pressure-fired system of a kind of isolated-phase enclosed bus includes gas supply device, grease trap, micro positive pressure device, high pressure cooling tank and three-phase enclosed busbar；The gas outlet of described gas supply device is connected with the air inlet of described grease trap, the gas outlet of described grease trap is connected with the first air inlet of described micro positive pressure device, the delivery outlet of described micro positive pressure device is connected with the air inlet of described high pressure cooling tank, the gas outlet of described high pressure cooling tank is connected with the second air inlet of described micro positive pressure device, the gas outlet of described micro positive pressure device is connected with the air inlet of described three-phase enclosed busbar, and the air pressure thief hatch of described three-phase enclosed busbar is connected with the gas returning port of described micro positive pressure device.
Further, described gas supply device adopts the one in power plant's source of the gas and Whole oiless idling press.
Further, the air inlet place of described grease trap and the top of high pressure cooling tank are respectively provided with relief valve；The gas outlet place of described grease trap arranges Pressure gauge.
Further, the bottom of described Whole oiless idling press, grease trap and high pressure cooling tank is provided with discharging valve.
A kind of pressure-fired based on the pressure-fired system of isolated-phase enclosed bus realizes method, and it comprises the following steps:
Output gas is inputted in grease trap by gas supply device；
Gas enters grease trap and carries out oil removing the turbid descending；
Gas after oil removing the turbid descending enters in high pressure cooling tank through micro positive pressure device and carries out high pressure cooling；
High pressure cooling gas enters in micro positive pressure device and is filtered, dewaters and dries；
Gas after micro positive pressure device process is filled with in the shell of three-phase enclosed busbar, makes the air pressure in enclosed busbar shell remain at slight positive pressure state.
Further, the end of opening of described enclosed busbar adopts disc insulator to carry out sealing and cutting off, and the outward flange fixedly mounting described disc insulator adopts casting aluminium material to process.
Further, the mounting process of described disc insulator includes:
Cast aluminium outward flange is welded on the two ends of enclosed busbar, in outer shell barrel wall, adopts argon arc welding that whole circle cast aluminium outward flange and barrel are carried out all-position welding；
Basin is packed into luggage join；First, fixing rubber weather strip in flange seal groove outside, to make sealing strip time fixing is naturalness；Secondly, basin set is carried out horizontal location；Again, after fixing basin set, adjust the concentricity of conductor, to gap uniformly after sealing strip is installed again, inner flange is installed；Finally, basin set must between inner flange and conductor after all installing, and 2 grading ring devices are installed at diagonal angle.
Further, after described cast aluminium outward flange is fixing, diagonal angle, multipoint mode spot welding mode is adopted to weld.
Further, the conductor in described enclosed busbar adopts adjustment lip block to be supported.
Further, described adjustment lip block adopts DMC insulant to make.
Due to the fact that and take above technical scheme, it has the advantage that the present invention passes through to adopt gas supply device, grease trap, micro positive pressure device, high pressure cooling tank and three-phase enclosed busbar, the enclosed busbar in power plant can be carried out integral sealing, make enclosed busbar really realize pressure-fired ability.The present invention by improving the overall tightness that can improve enclosed busbar further to the structure of enclosed busbar.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pressure-fired system of the isolated-phase enclosed bus provided in one embodiment of the invention.
In figure: 1, power plant's source of the gas；2, Whole oiless idling press；3, grease trap；4, micro positive pressure device；5, high pressure cooling tank；6, three-phase enclosed busbar；7, relief valve；8, Pressure gauge；9, discharging valve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
As it is shown in figure 1, the invention provides the pressure-fired system of a kind of isolated-phase enclosed bus, it includes gas supply device, grease trap 3, micro positive pressure device 4, high pressure cooling tank 5 and three-phase enclosed busbar 6.Wherein, gas supply device adopts power plant's source of the gas 1 or Whole oiless idling press 2；When adopting power plant's source of the gas 1, the gas outlet of power plant's source of the gas 1 is connected with the air inlet of grease trap 3.When adopting Whole oiless idling press 2, the gas outlet of Whole oiless idling press 2 is connected with the air inlet of grease trap 3.The gas outlet of grease trap 3 is connected with the first air inlet of micro positive pressure device 4, the delivery outlet of micro positive pressure device 4 is connected with the air inlet of high pressure cooling tank 5, the gas outlet of high pressure cooling tank 5 is connected with the second air inlet of micro positive pressure device 4, the gas outlet of micro positive pressure device 4 is connected with the air inlet of three-phase enclosed busbar 6, and the air pressure thief hatch of three-phase enclosed busbar 6 is connected with the gas returning port of micro positive pressure device 4.
The work process of the pressure-fired system of isolated-phase enclosed bus of the present invention is: in the gas input grease trap 3 of power plant's source of the gas 1 or Whole oiless idling press 2 output, gas is carried out oil removing the turbid descending by grease trap 3.Gas after oil removing the turbid descending enters in high pressure cooling tank 5 through micro positive pressure device 4, and gas is compressed and cools down by high pressure cooling tank 5, obtains high pressure cooling gas.High pressure cooling gas enters micro positive pressure device 4, and high pressure is cooled down gas and is filtered, dewaters and is filled into after drying in the shell of three-phase enclosed busbar 6 by micro positive pressure device 4, makes the air pressure in enclosed busbar shell remain at slight positive pressure state.
In above-described embodiment, the air inlet place of grease trap 3 and the top of high pressure cooling tank 5 are respectively provided with relief valve 7.
In above-described embodiment, the gas outlet place of grease trap 3 arranges Pressure gauge 8.
In above-described embodiment, the bottom of Whole oiless idling press 2, grease trap 3 and high pressure cooling tank 5 is provided with discharging valve 9.
Based on the pressure-fired system of isolated-phase enclosed bus provided by the invention, present invention also offers a kind of pressure-fired and realize method, it comprises the following steps:
1) output gas is inputted in grease trap 3 by gas supply device.
2) gas entrance grease trap 3 carries out oil removing the turbid descending.
3) gas after oil removing the turbid descending enters through micro positive pressure device 4 and carries out high pressure cooling in high pressure cooling tank 5.
4) high pressure cooling gas enters in micro positive pressure device 4 and is filtered, dewaters and dries.
5) gas after micro positive pressure device 4 process is filled with in the shell of three-phase enclosed busbar 6, makes the air pressure in enclosed busbar shell remain at slight positive pressure state.
Above-mentioned pressure-fired realizes in method, and good for the overall tightness making power plant metal isolated-phase enclosed bus, it is achieved pressure-fired ability, the structure of isolated-phase enclosed bus has also been improved by the present invention.
Isolated-phase enclosed bus is mainly made up of shell and conductor, is supported by many support insulators between shell and conductor, and disc insulator seals opening end and cuts off.The structures shape of support insulator and disc insulator the quality of isolated-phase enclosed bus overall sealing performance, and then affects the pressure-fired ability of the pressure-fired system of isolated-phase enclosed bus.
The outward flange of fixed installation disc insulator adopts casting aluminium material to process, and the outward flange fixedly mounting disc insulator in prior art generally adopts wrought aluminium plate to process.Compared with wrought aluminium plate, casting aluminium material has the advantage that one-piece casting is reprocessed, and surface degree is high, little with the shell welding deformation of isolated-phase enclosed bus, and intensity is high, and bolt is twisted tightly, not easily threads off, provides essential condition for realizing high-quality sealing property.
After running a period of time in the enclosure due to the conductor in isolated-phase enclosed bus, conductor there will be sinking, it is therefore necessary to the conductor sunk give powerful support.Adopt adjustment lip block that the conductor sunk is supported, adjust lip block and adopt DMC insulant to make.
The mounting process of disc insulator has also been improved by the present invention, and it specifically includes:
1) the cast aluminium outward flange of basin set it is welded and fixed；
Cast aluminium outward flange is welded on the two ends of enclosed busbar, in outer shell barrel wall, adopts argon arc welding that whole circle cast aluminium outward flange and barrel are carried out all-position welding.
For ensureing to overlap the smooth of binding face with dish, cast aluminium outward flange must be the level of state with shell.
After cast aluminium outward flange is fixing, it is necessary to first adopting diagonal angle, multipoint mode spot welding mode, whole circle can not less than 8 solder joints, i.e. 45 degree of solder joints, it is therefore an objective to reduce welding deformation as far as possible.If cast aluminium outward flange injustice or deformation are excessively, after dish set installation, its binding face meeting imprecision, can cause dish set to break or break gradually after bolt clamp force.
2) assembling of basin set；
First, fixing rubber weather strip in flange seal groove outside, to make sealing strip time fixing is naturalness, it is impossible to too tight or too loose.When purpose is to avoid mounting pot to overlap, adhesive tape easily goes out groove, and can not be observed, and causes poor sealing.
Secondly, to the technological requirement of basin set location it is: basin is enclosed within the cylinder entering enclosed busbar in whole process, it is necessary to keep entirety in level, progressive state, more steady particularly in needing during close to fixing outward flange, touches away in order to avoid sealing joint strip in groove is squeezed.
After basin set and outward flange para-position, respectively it is fixed with two fixing bolts in cross direction, 180 degree of diagonal angles.The general whole circle fixing bolt of 24～32 M8～12.
Again, after fixing basin set, whether uniform observe the gap between bus-bars conductor and basin set border, if it is uneven, maximum gap is more than the diameter using sealing strip, it is necessary to adjust the concentricity of conductor, to gap uniformly after sealing strip is installed again, installing inner flange, its mounting process is identical with assembling outward flange.
Finally, basin set must between inner flange and conductor after all installing, and 2 grading ring devices are installed at diagonal angle, and for discharging the overvoltage that basin puts, otherwise local temperature can exceed standard, thus causing that rubber seal is aging, losing efficacy.
The present invention is not limited to above-mentioned preferred forms; those skilled in the art can draw other various forms of products under the enlightenment of the present invention; no matter but in its shape or structure, do any change; every have same or like with the application like technical scheme, all fall within protection scope of the present invention.
Claims (10)
1. the pressure-fired system of an isolated-phase enclosed bus, it is characterised in that: it includes gas supply device, grease trap, micro positive pressure device, high pressure cooling tank and three-phase enclosed busbar；The gas outlet of described gas supply device is connected with the air inlet of described grease trap, the gas outlet of described grease trap is connected with the first air inlet of described micro positive pressure device, the delivery outlet of described micro positive pressure device is connected with the air inlet of described high pressure cooling tank, the gas outlet of described high pressure cooling tank is connected with the second air inlet of described micro positive pressure device, the gas outlet of described micro positive pressure device is connected with the air inlet of described three-phase enclosed busbar, and the air pressure thief hatch of described three-phase enclosed busbar is connected with the gas returning port of described micro positive pressure device.
2. the pressure-fired system of a kind of isolated-phase enclosed bus as claimed in claim 1, it is characterised in that: described gas supply device adopts the one in power plant's source of the gas and Whole oiless idling press.
3. the pressure-fired system of a kind of isolated-phase enclosed bus as claimed in claim 1, it is characterised in that: the air inlet place of described grease trap and the top of high pressure cooling tank are respectively provided with relief valve；The gas outlet place of described grease trap arranges Pressure gauge.
4. the pressure-fired system of a kind of isolated-phase enclosed bus as claimed in claim 1, it is characterised in that: the bottom of described Whole oiless idling press, grease trap and high pressure cooling tank is provided with discharging valve.
5. the pressure-fired based on the pressure-fired system of the isolated-phase enclosed bus described in any one of Claims 1 to 4 realizes a method, and it comprises the following steps:
Output gas is inputted in grease trap by gas supply device；
Gas enters grease trap and carries out oil removing the turbid descending；
Gas after oil removing the turbid descending enters in high pressure cooling tank through micro positive pressure device and carries out high pressure cooling；
High pressure cooling gas enters in micro positive pressure device and is filtered, dewaters and dries；
Gas after micro positive pressure device process is filled with in the shell of three-phase enclosed busbar, makes the air pressure in enclosed busbar shell remain at slight positive pressure state.
6. a kind of pressure-fired as claimed in claim 5 realizes method, it is characterised in that: the end of opening of described enclosed busbar adopts disc insulator to carry out sealing and cutting off, and the outward flange fixedly mounting described disc insulator adopts casting aluminium material to process.
7. a kind of pressure-fired as claimed in claim 6 realizes method, it is characterised in that: the mounting process of described disc insulator includes:
Cast aluminium outward flange is welded on the two ends of enclosed busbar, in outer shell barrel wall, adopts argon arc welding that whole circle cast aluminium outward flange and barrel are carried out all-position welding；
Basin is packed into luggage join；First, fixing rubber weather strip in flange seal groove outside, to make sealing strip time fixing is naturalness；Secondly, basin set is carried out horizontal location；Again, after fixing basin set, adjust the concentricity of conductor, to gap uniformly after sealing strip is installed again, inner flange is installed；Finally, basin set must between inner flange and conductor after all installing, and 2 grading ring devices are installed at diagonal angle.
8. a kind of pressure-fired as claimed in claim 7 realizes method, it is characterised in that: after described cast aluminium outward flange is fixing, adopt diagonal angle, multipoint mode spot welding mode to weld.
9. a kind of pressure-fired as claimed in claim 5 realizes method, it is characterised in that: the conductor in described enclosed busbar adopts adjustment lip block to be supported.
10. a kind of pressure-fired as claimed in claim 9 realizes method, it is characterised in that: described adjustment lip block adopts DMC insulant to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610221739.4A CN105762737B (en) | 2016-04-11 | 2016-04-11 | A kind of the micro-positive pressure system and micro-positive pressure implementation method of isolated-phase enclosed bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610221739.4A CN105762737B (en) | 2016-04-11 | 2016-04-11 | A kind of the micro-positive pressure system and micro-positive pressure implementation method of isolated-phase enclosed bus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105762737A true CN105762737A (en) | 2016-07-13 |
| CN105762737B CN105762737B (en) | 2018-07-17 |
Family
ID=56333832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610221739.4A Active CN105762737B (en) | 2016-04-11 | 2016-04-11 | A kind of the micro-positive pressure system and micro-positive pressure implementation method of isolated-phase enclosed bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105762737B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070131585A1 (en) * | 2005-11-29 | 2007-06-14 | Christian Koch | High-speed chamber mixer for catalytic oil suspensions as a reactor for the depolymerization and polymerization of hydrocarbon-containing residues in the oil circulation to obtain middle distillate |
| CN201717537U (en) * | 2010-04-27 | 2011-01-19 | 中国西电电气股份有限公司 | Integral carrying device of bus in gaseous insulating metal closed switch device |
| CN202167762U (en) * | 2011-05-23 | 2012-03-14 | 平高集团有限公司 | Bus assembly for super-high voltage engineering GIS |
| CN103178467A (en) * | 2013-03-14 | 2013-06-26 | 河南省电力公司南阳供电公司 | SF6 (sulfur hexafluoride) gas chamber sealing method of combined electric appliance |
| CN103457211A (en) * | 2013-07-02 | 2013-12-18 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Micro positive pressure device of 30MW generator enclosed busbar and working method of micro positive pressure device |
| CN203442484U (en) * | 2013-07-05 | 2014-02-19 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Novel generator enclosed busbar micro positive pressure device |
| CN104882837A (en) * | 2015-05-25 | 2015-09-02 | 镇江市高等专科学校 | Enclosed busbar micro-positive-pressure hot air maintenance apparatus |
| CN105298433A (en) * | 2015-09-21 | 2016-02-03 | 河南理工大学 | Hydraulic pressing, flushing and pumping integrated hole sealing device and method |
| CN205724757U (en) * | 2016-04-11 | 2016-11-23 | 北京良乡昊融电力设备有限公司 | A kind of pressure-fired system of isolated-phase enclosed bus |
-
2016
- 2016-04-11 CN CN201610221739.4A patent/CN105762737B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070131585A1 (en) * | 2005-11-29 | 2007-06-14 | Christian Koch | High-speed chamber mixer for catalytic oil suspensions as a reactor for the depolymerization and polymerization of hydrocarbon-containing residues in the oil circulation to obtain middle distillate |
| CN201717537U (en) * | 2010-04-27 | 2011-01-19 | 中国西电电气股份有限公司 | Integral carrying device of bus in gaseous insulating metal closed switch device |
| CN202167762U (en) * | 2011-05-23 | 2012-03-14 | 平高集团有限公司 | Bus assembly for super-high voltage engineering GIS |
| CN103178467A (en) * | 2013-03-14 | 2013-06-26 | 河南省电力公司南阳供电公司 | SF6 (sulfur hexafluoride) gas chamber sealing method of combined electric appliance |
| CN103457211A (en) * | 2013-07-02 | 2013-12-18 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Micro positive pressure device of 30MW generator enclosed busbar and working method of micro positive pressure device |
| CN203442484U (en) * | 2013-07-05 | 2014-02-19 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Novel generator enclosed busbar micro positive pressure device |
| CN104882837A (en) * | 2015-05-25 | 2015-09-02 | 镇江市高等专科学校 | Enclosed busbar micro-positive-pressure hot air maintenance apparatus |
| CN105298433A (en) * | 2015-09-21 | 2016-02-03 | 河南理工大学 | Hydraulic pressing, flushing and pumping integrated hole sealing device and method |
| CN205724757U (en) * | 2016-04-11 | 2016-11-23 | 北京良乡昊融电力设备有限公司 | A kind of pressure-fired system of isolated-phase enclosed bus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105762737B (en) | 2018-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105351677B (en) | Gas piping system band gas method for repairing and mending | |
| CN103016693B (en) | A kind of reducer shell junction plane sealing configuration | |
| CN205724757U (en) | A kind of pressure-fired system of isolated-phase enclosed bus | |
| CN105762737A (en) | Micro-positive pressure system for separated-phase enclosed busbar and micro-positive pressure implementation method | |
| CN206834668U (en) | A kind of device sealed for cable or pipeline through-wall hole | |
| CN209279774U (en) | A kind of air cooler sealing structure | |
| CN201554850U (en) | Sealing structure | |
| CN109473927A (en) | A kind of disk insulator installation special tooling and its installation method | |
| CN201698864U (en) | Sealing strip protection structure for oil-immersed transformer | |
| CN204558987U (en) | A kind of rupture pressure disc structure | |
| CN107204592A (en) | One kind is used for the sealed device of cable or pipeline through-wall hole and encapsulating method | |
| CN106352082B (en) | A kind of blower fan sealing structure | |
| CN202736823U (en) | Waterproof sealing device of outdoor sulfur hexafluoride combination switch | |
| CN206704200U (en) | Labyrinth sealing type rear end cap axle box forms | |
| CN101245475A (en) | Electricity-leakage-proof sealing device for aluminum cell | |
| CN214247936U (en) | Flange face bolt gap plugging device | |
| CN206323248U (en) | Cold water inlet flange leakage hydrogen device for plugging is determined at the top of a kind of generator | |
| CN205212262U (en) | Little positive pressure dust proof , dampproofing block terminal | |
| CN210079822U (en) | Sealing box body pressing device of centrifugal machine | |
| CN205542255U (en) | Novel transformer sealed cowling | |
| CN107611298A (en) | Battery bag sealing installation structure and electric automobile | |
| CN105762813A (en) | Harmonic reactive power compensation device for outdoor column | |
| CN201129454Y (en) | Gas sealing device | |
| CN209293735U (en) | A kind of preventer group tooling for protecting metal sealing cushion ring | |
| CN203629332U (en) | Labyrinth gland of annular cooler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |