CN205724757U - A kind of pressure-fired system of isolated-phase enclosed bus - Google Patents
A kind of pressure-fired system of isolated-phase enclosed bus Download PDFInfo
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- CN205724757U CN205724757U CN201620297211.0U CN201620297211U CN205724757U CN 205724757 U CN205724757 U CN 205724757U CN 201620297211 U CN201620297211 U CN 201620297211U CN 205724757 U CN205724757 U CN 205724757U
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Abstract
This utility model relates to the pressure-fired system of a kind of isolated-phase enclosed bus, and it includes gas supply device, grease trap, micro positive pressure device, high pressure cooling tank and three-phase enclosed busbar；The gas outlet of gas supply device is connected with the air inlet of grease trap, the gas outlet of grease trap is connected with the first air inlet of micro positive pressure device, the delivery outlet of micro positive pressure device is connected with the air inlet of high pressure cooling tank, the gas outlet of high pressure cooling tank is connected with the second air inlet of micro positive pressure device, the gas outlet of micro positive pressure device is connected with the air inlet of three-phase enclosed busbar, and the air pressure thief hatch of three-phase enclosed busbar is connected with the gas returning port of micro positive pressure device.Gas supply device uses power plant's source of the gas or Whole oiless idling press.This utility model can carry out integral sealing to the enclosed busbar in power plant, makes enclosed busbar really realize pressure-fired ability.
Description
Technical field
This utility model belongs to technical field of power generation, is specifically related to the pressure-fired system of a kind of isolated-phase enclosed bus.
Background technology
At present, at home in the generating set in most thermal power plants, electromotor isolated-phase enclosed bus is because having
Easy to use, steel construction generates heat less, security reliability is high, operation maintenance workload is relatively small and not by ring
The advantages such as border impact and be widely used.Owing to isolated-phase enclosed bus is relative closure, when under ambient temperature
When fall or load current reduction cause bus temperature to reduce, the air pressure in enclosed busbar will reduce, moisture
Or dust etc. will suck in enclosed busbar from some leakage points with air, thus give the operating band of enclosed busbar
Carry out potential safety hazard.
For preventing extraneous moisture, dust etc. from entering in enclosed busbar, people use pressure-fired aerating device simultaneously
Inside three-phase enclosed busbar, it is filled with anhydrous, the dry gas of oil-free, makes the air pressure in enclosed busbar slightly above
External atmosphere pressure and form gas, thus avoid moisture, dust, haze and the industrial waste gas etc. in the external world to invade envelope
Close inside bus, the generation of effective Restraining seal bus internal condensation, occur preventing various flashover fault
The hydrogen also simultaneously being able to avoid electromotor to leak enters inside enclosed busbar.
In recent years, there is flashover fault in various degree in domestic many gencos isolated-phase enclosed bus in succession,
And tend to the situation that takes place frequently, have a strong impact on the safe and reliable operation of generating set.At present, enclosed busbar
Still suffer from many self problems and hidden danger, this " subhealth state " state of enclosed busbar, it is difficult to resist current
The weathers such as high humidity, sleet, thick fog, haze are continually changing adverse effect.Its major accident reason
It is owing to enclosed busbar body seal is not tight, causes humid air after invading, to cause internal serious condensation to dodge
Network accident, or after inner inlet, directly contribute shorted to earth accident.Although design in recent years, manufacture from phase
Enclosed busbar has had some dewing-proof measures, such as, have the enclosed busbar of pressure-fired function, but owing to sealing
Not tight, internal pressure keeps incessantly at all, and the isolated-phase enclosed bus of more than 80% all can not normally use, remaining
The isolated-phase enclosed bus of 20% may seal the most better, substantially can maintain the pressure of a few minutes, but need inflation
Equipment ceaselessly works, and the bus leak point of discovery also can only carry out simple process by breaking fluid sealant, uses several
After individual month, sealing property reduces or loses.
The sealing problem of enclosed busbar has become the important restriction factor of the safe and stable operation of generating set.Study carefully
Its reason, mainly have following some: 1) disc insulator the most key in enclosed busbar seal structure and
The design holding insulator sealing structure is unreasonable.2) there are quality problems in enclosed busbar.3) enclosed busbar
Transit link has problems.4) the in-site installation existing problems of enclosed busbar, enclosed busbar is by some sections of groups
Becoming, in installation process, there is omission weldering, sand holes, pore etc. and ask in the shell between bus in welding process
Topic.
Utility model content
In order to solve the problems referred to above that prior art exists, this utility model provides a kind of isolated-phase enclosed bus
Pressure-fired system.
For achieving the above object, this utility model takes techniques below scheme: a kind of isolated-phase enclosed bus micro-
Positive pressure system includes that gas supply device, grease trap, micro positive pressure device, high pressure cooling tank and three-phase close mother
Line；The gas outlet of described gas supply device is connected with the air inlet of described grease trap, going out of described grease trap
QI KOU is connected with the first air inlet of described micro positive pressure device, the delivery outlet of described micro positive pressure device and described height
The air inlet of pressure cooling tank connects, and the gas outlet of described high pressure cooling tank is entered with the second of described micro positive pressure device
QI KOU connects, and the gas outlet of described micro positive pressure device is connected with the air inlet of described three-phase enclosed busbar, described
The air pressure thief hatch of three-phase enclosed busbar is connected with the gas returning port of described micro positive pressure device.
Further, the one during described gas supply device uses power plant's source of the gas and Whole oiless idling press.
Further, at the air inlet of described grease trap and the top of high pressure cooling tank is respectively provided with relief valve.
Further, at the gas outlet of described grease trap, Pressure gauge is set.
Further, the bottom of described Whole oiless idling press, grease trap and high pressure cooling tank is provided with and discharges water
Valve.
Further, the end of opening of described enclosed busbar uses disc insulator seal and cut off, fixing
The outward flange installing described disc insulator uses casting aluminium material to process.
Further, the conductor in described enclosed busbar uses adjustment lip block to be supported.
Further, described adjustment lip block uses DMC insulant to make.
This utility model is owing to taking above technical scheme, and it has the advantage that this utility model passes through to adopt
With gas supply device, grease trap, micro positive pressure device, high pressure cooling tank and three-phase enclosed busbar, it is possible to right
The enclosed busbar in power plant carries out integral sealing, makes enclosed busbar really realize pressure-fired ability.This practicality is new
Type can improve the overall tightness of enclosed busbar further by improving the structure of enclosed busbar.
Accompanying drawing explanation
Fig. 1 is that the structure of the pressure-fired system of the isolated-phase enclosed bus provided in this utility model one embodiment is shown
It is intended to.
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
With embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, this utility model 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.Its
In, gas supply device uses power plant's source of the gas 1 or Whole oiless idling press 2；When using power plant's source of the gas 1, electricity
The gas outlet of factory's source of the gas 1 is connected with the air inlet of grease trap 3.When using Whole oiless idling press 2, completely without
The oil gas outlet of air compressor machine 2 is connected with the air inlet of grease trap 3.The gas outlet of grease trap 3 fills with pressure-fired
Putting the first air inlet connection of 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, going out of micro positive pressure device 4
QI KOU is connected with the air inlet of three-phase enclosed busbar 6, the air pressure thief hatch of three-phase enclosed busbar 6 and pressure-fired
The gas returning port of device 4 connects.
The work process of the pressure-fired system of this utility model isolated-phase enclosed bus is: power plant's source of the gas 1 or completely without
In the gas input grease trap 3 of oil air compressor machine 2 output, grease trap 3 carries out oil removing the turbid descending to gas.Oil removing
Gas after the turbid descending is in micro positive pressure device 4 enters high pressure cooling tank 5, and gas is carried out by high pressure cooling tank 5
Compression and cooling, obtain high pressure cooling gas.High pressure cooling gas enters micro positive pressure device 4, micro positive pressure device
4 pairs of high pressure cooling gas filters, except water and be filled into three-phase enclosed busbar 6 after drying shell in, make
Air pressure in enclosed busbar shell remains at slight positive pressure state.
In above-described embodiment, at the air inlet of the grease trap 3 and top of high pressure cooling tank 5 is respectively provided with relief valve 7.
In above-described embodiment, Pressure gauge 8 is set at the gas outlet of grease trap 3.
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.
Pressure-fired system based on the isolated-phase enclosed bus that this utility model provides, this utility model additionally provides
A kind of pressure-fired implementation 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 carries out high pressure cooling in micro positive pressure device 4 enters high pressure cooling tank 5.
4) high pressure cooling gas enters in micro positive pressure device 4 and carries out filtering, except water be dried.
5) gas after micro positive pressure device 4 processes is filled with in the shell of three-phase enclosed busbar 6, makes enclosed busbar
Air pressure in shell remains at slight positive pressure state.
It is in above-mentioned pressure-fired implementation method, good for the overall tightness making power plant metal isolated-phase enclosed bus,
Realizing pressure-fired ability, the structure of isolated-phase enclosed bus is also improved by this utility model.
Isolated-phase enclosed bus is mainly made up of shell and conductor, by many support insulators between shell and conductor
Supporting, disc insulator seals opening end and cuts off.Support insulator and the knot of disc insulator
Structure decides the quality of isolated-phase enclosed bus overall sealing performance, and then affects the pressure-fired of isolated-phase enclosed bus
The pressure-fired ability of system.
The outward flange of fixed installation disc insulator uses casting aluminium material to process, and fixing in prior art
The outward flange installing disc insulator generally uses wrought aluminium plate to process.Compared with wrought aluminium plate, casting aluminium material
Having the advantage that one-piece casting is reprocessed, surface degree is high, with the shell welding deformation of isolated-phase enclosed bus
Little, intensity is high, and bolt is twisted tightly, is difficult to thread off, provides necessity for realizing high-quality sealing property
Condition.
After running a period of time in the enclosure due to the conductor in isolated-phase enclosed bus, conductor there will be sinking,
Therefore have to give strength to the conductor sunk to support.Use adjustment lip block that the conductor sunk is carried out
Support, adjust lip block and use DMC insulant to make.
The mounting process of disc insulator is also improved by this utility model, 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, uses argon arc welding to whole circle
Cast aluminium outward flange and barrel carry 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 use diagonal angle, multipoint mode spot welding mode, whole circle can not be less than 8
Individual solder joint, i.e. 45 degree solder joints, it is therefore an objective to as far as possible reduce welding deformation.If cast aluminium outward flange is uneven or becomes
Shape is excessive, and after dish set installation, its binding face meeting imprecision, can cause dish set rupture or gradually break after bolt clamp force
Split.
2) assembling of basin set；
First, fixing rubber weather strip in flange seal groove outside, time fixing, sealing strip to be made is nature
State, 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 seen
Measure, cause poor sealing.
Secondly, to the technological requirement of basin set location it is: during basin is whole in being enclosed within the cylinder entering enclosed busbar,
Have to keep overall in level, progressive state, especially need when close to fixing outward flange more steady,
Touch 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 180 degree of diagonal angle ten word directions.
The general whole circle fixing bolt of 24～32 M8～12.
Again, after fixing basin set, observe the gap between bus-bars conductor and basin set border the most uniform, if not
Uniformly, maximum gap is more than the diameter using sealing strip, it is necessary to adjust the concentricity of conductor, equal to gap
Installing sealing strip after even again, install inner flange, its mounting process is identical with assembling outward flange.
Finally, basin set must be between inner flange and conductor after all installing, and 2 grading ring devices are installed at diagonal angle,
For discharging the overvoltage that basin puts, otherwise local temperature can exceed standard, thus cause rubber seal aging,
Lost efficacy.
This utility model is not limited to above-mentioned preferred forms, and those skilled in the art are of the present utility model
Other various forms of products all can be drawn under enlightenment, no matter but in its shape or structure, make any change,
Every have same as the present application or akin technical scheme, all fall within protection domain of the present utility model it
In.
Claims (8)
1. the pressure-fired system of an isolated-phase enclosed bus, it is characterised in that: it include gas supply device,
Grease trap, micro positive pressure device, high pressure cooling tank and three-phase enclosed busbar；Giving vent to anger of described gas supply device
Mouth is connected with the air inlet of described grease trap, the gas outlet of described grease trap and the first of described micro positive pressure device
Air inlet connects, and the delivery outlet of described micro positive pressure device is connected with the air inlet of described high pressure cooling tank, described
The gas outlet of high pressure cooling tank is connected with the second air inlet of described micro positive pressure device, described micro positive pressure device
Gas outlet is connected with the air inlet of described three-phase enclosed busbar, the air pressure thief hatch of described three-phase enclosed busbar with
The gas returning port of described micro positive pressure device connects.
The pressure-fired system of a kind of isolated-phase enclosed bus the most as claimed in claim 1, it is characterised in that: institute
State gas supply device and use the one in power plant's source of the gas and Whole oiless idling press.
The pressure-fired system of a kind of isolated-phase enclosed bus the most as claimed in claim 1, it is characterised in that: institute
State at the air inlet of grease trap and the top of high pressure cooling tank is respectively provided with relief valve.
The pressure-fired system of a kind of isolated-phase enclosed bus the most as claimed in claim 1, it is characterised in that: institute
State and Pressure gauge is set at the gas outlet of grease trap.
The pressure-fired system of a kind of isolated-phase enclosed bus the most as claimed in claim 1, it is characterised in that: institute
The bottom stating Whole oiless idling press, grease trap and high pressure cooling tank is provided with discharging valve.
6. the pressure-fired system of a kind of isolated-phase enclosed bus as described in claim 1 or 2 or 3 or 4 or 5,
It is characterized in that: the end of opening of described enclosed busbar uses disc insulator seal and cut off, fixing peace
The outward flange filling described disc insulator uses casting aluminium material to process.
7. the pressure-fired system of a kind of isolated-phase enclosed bus as described in claim 1 or 2 or 3 or 4 or 5,
It is characterized in that: the conductor in described enclosed busbar uses adjustment lip block to be supported.
The pressure-fired system of a kind of isolated-phase enclosed bus the most as claimed in claim 7, it is characterised in that: institute
Stating adjustment lip block uses DMC insulant to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620297211.0U CN205724757U (en) | 2016-04-11 | 2016-04-11 | A kind of pressure-fired system of isolated-phase enclosed bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620297211.0U CN205724757U (en) | 2016-04-11 | 2016-04-11 | A kind of pressure-fired system of isolated-phase enclosed bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205724757U true CN205724757U (en) | 2016-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620297211.0U Active CN205724757U (en) | 2016-04-11 | 2016-04-11 | A kind of pressure-fired system of isolated-phase enclosed bus |
Country Status (1)
| Country | Link |
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| CN (1) | CN205724757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762737A (en) * | 2016-04-11 | 2016-07-13 | 北京良乡昊融电力设备有限公司 | Micro-positive pressure system for separated-phase enclosed busbar and micro-positive pressure implementation method |
-
2016
- 2016-04-11 CN CN201620297211.0U patent/CN205724757U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762737A (en) * | 2016-04-11 | 2016-07-13 | 北京良乡昊融电力设备有限公司 | Micro-positive pressure system for separated-phase enclosed busbar and micro-positive pressure implementation method |
| CN105762737B (en) * | 2016-04-11 | 2018-07-17 | 北京良乡昊融电力设备有限公司 | A kind of the micro-positive pressure system and micro-positive pressure implementation method of isolated-phase enclosed bus |
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| GR01 | Patent grant |