CN201838959U

CN201838959U - Anti-condensation drying system of isolated-phase enclosed busbar

Info

Publication number: CN201838959U
Application number: CN2010205002922U
Authority: CN
Inventors: 赵�卓; 汪晓群; 陈宏�
Original assignee: ZHENJIANG EAST CHINA ELECTRIC POWER EQUIPMENT FACTORY
Current assignee: Co., Ltd of Zhenjiang East China Electric Power Equipment Factory
Priority date: 2010-08-20
Filing date: 2010-08-20
Publication date: 2011-05-18
Anticipated expiration: 2020-08-20

Abstract

The utility model discloses an anti-condensation drying system of an isolated-phase enclosed busbar, which comprises a three-phase enclosed busbar, a blast blower, an air drier, an electric valve I, an electric valve II, an electric valve III, a stop valve I, a stop valve II, a safety valve and a control box, wherein one end of the electric valve I is communicated with the atmosphere, and the other end is connected with one end of the electric valve II and the input end of the blast blower respectively; the output end of the blast blower is connected with the input end of the air drier; the output end of the air drier is communicated with an air inlet pipeline of a shell of the three-phase enclosed busbar by the stop valve I; an air return pipeline of the shell of the three-phase enclosed busbar is communicated with the other end of the electric valve II by the stop valve II; the electric valve III is communicated with the inlet pipeline and the air return pipeline of the shell of the three-phase enclosed busbar; and the shell of the three-phase enclosed busbar is connected with the safety valve, a relative humidity instrument and an air pressure gauge respectively. The anti-condensation drying system of the isolated-phase enclosed busbar can realize two working modes including a micro positive pressure drying mode and an air circulation drying mode in a set of drying device, and is small in occupied space, low in investment and convenient to maintain and repair.

Description

The anti-condensation drying system of isolated-phase enclosed bus

Technical field

The utility model relates to a kind of isolated-phase enclosed bus that is used for electric energy transmitting, and particularly a kind of device that improves the isolated-phase enclosed bus insulation property belongs to electrical equipment technical field.

Background technology

Isolated-phase enclosed bus is meant every enclosed busbar that has independent metal shell mutually, and at present, the above generating set of single-machine capacity 135MW extensively adopts isolated-phase enclosed bus as electric energy and the signal of telecommunication transmission equipment sent out between the change group equipment.The isolated-phase enclosed bus shell contains an airtight separate space, when extraneous weather conditions or self-operating state change, as the relative humidity of air when big, on the inner surface of isolated-phase enclosed bus metal shell and insulator surface, be easy to generate condensation, make apparatus insulated decreased performance, the safe operation of harm system.In order to address this problem, general independent use air circulation drying device of prior art or pressure-fired device are removed the condensation on isolated-phase enclosed bus metal shell inner surface and the insulator surface.The advantage of air circulation drying device is the moisture that can initiatively adsorb apace in the isolated-phase enclosed bus, reduces the inner absolute humidity of bus, and is lower to the bus shell sealing requirements; Shortcoming is under the equipment run-stopping status, can not set up certain air positive pressure power in the bus, makes external humidification air or dust take advantage of a weak point easily.The advantage of pressure-fired drying device is to set up certain air positive pressure power in isolated-phase enclosed bus, can prevent that external humidification air and dust from entering.Shortcoming is fast and effeciently the excessive water steam that enters bus inside to be discharged, and is higher to the sealing requirements of isolated-phase enclosed bus shell.As disposing two kinds of equipment simultaneously, can cause problems such as investment cost obviously increases, occupation area of equipment strengthens, power consumption increases, repair and maintenance is loaded down with trivial details again.

The utility model content

In order to overcome isolated-phase enclosed bus air circulation drying device and the single shortcoming of pressure-fired apparatus function, the utility model provides a kind of and is easy to arrange and maintenance, drying effect are good, reduced investment, isolated-phase enclosed bus drying device that cost performance is high.

The utility model is achieved by the following technical programs:

The anti-condensation drying system of a kind of isolated-phase enclosed bus, comprise the three-phase enclosed busbar, air blast, dried-air drier, valve with electrically motorized operation I, valve with electrically motorized operation II, valve with electrically motorized operation III, break valve I, break valve II, safety valve, control cabinet, described valve with electrically motorized operation I one end leads to atmosphere, the valve with electrically motorized operation I other end respectively with valve with electrically motorized operation II one end, the air blast input links to each other, the air blast output links to each other with the dried-air drier input, the dried-air drier output communicates with three-phase enclosed busbar shell air inlet pipeline by break valve I, three-phase enclosed busbar shell return line communicates with the valve with electrically motorized operation II other end by break valve II, and valve with electrically motorized operation III is communicated with three-phase enclosed busbar shell air inlet pipeline and three-phase enclosed busbar shell return line.

The anti-condensation drying system of aforesaid isolated-phase enclosed bus, wherein said three-phase enclosed busbar shell link to each other with safety valve and the relative humidity instrument, the air gauge that are arranged in the control cabinet respectively.

The utility model determines it to be in the pressure-fired working method according to the air pressure and the relative humidity situation of the three-phase enclosed busbar inside of relative humidity instrument, air gauge detection, or the working method of air circulation drying.When needs were in the pressure-fired working method, the utility model was sent into the dried dry pressure-air of drying machine in the three-phase enclosed busbar shell simultaneously, thereby set up certain normal pressure in the three-phase enclosed busbar.When needs are in the air circulation drying mode,, make air in three-phase enclosed busbar shell and connecting pipeline, set up drying cycles by the work of air blast and drying machine.

The utility model can be realized the dry and dry two kinds of working methods of air circulation of pressure-fired in a cover drying system, do not reach requirement in case overcome the isolated-phase enclosed bus sealing, the shortcoming that existing pressure-fired drying device can cause anti-condensation measure all to be lost efficacy; Also overcome existing air circulation drying device function singleness, the shortcoming that the blower fan shut down condition down can not stop external humidification air and dust to enter has improved the reliability of anti-condensation effect and device.The utility model is only with an air blast, a cover drying equipment and cover air inlet, a return line, takes up an area of for a short time, and reduced investment is convenient to safeguard and maintenance, especially is fit to the hydroelectric station and the Binhai Generator Station use of humid environment.

Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.

Description of drawings

Fig. 1 is a schematic diagram of the present utility model, is in the air circulation drying regime this moment;

Fig. 2 is a schematic diagram of the present utility model, is in slight positive pressure state this moment.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As Fig. 1～shown in Figure 2, the utility model comprises three-phase enclosed busbar 1, air blast 2, dried-air drier 3, valve with electrically motorized operation I4, valve with electrically motorized operation II5, valve with electrically motorized operation III6, break valve I7, break valve II8, safety valve 13, control cabinet 10, valve with electrically motorized operation I4 one end leads to atmosphere, the other end respectively with valve with electrically motorized operation II5 one end, air blast 2 inputs link to each other, air blast 2 outputs link to each other with dried-air drier 3 inputs, dried-air drier 3 outputs communicate with the air inlet pipeline 9 of three-phase enclosed busbar shell by break valve I7, the return line 13 of three-phase enclosed busbar shell communicates with the valve with electrically motorized operation II5 other end by break valve II8, and valve with electrically motorized operation III6 is communicated with three-phase enclosed busbar shell air inlet pipeline 9 and three-phase enclosed busbar shell return line 13.Three-phase enclosed busbar shell 1A respectively be arranged on control cabinet 10 in air gauge 11, relative humidity instrument 12 link to each other, three-phase enclosed busbar shell 1A also links to each other with safety valve 14.

As shown in Figure 1, before the work, break valve I7, break valve II8 should be in full open position.After relative humidity reaches set point (for example 50%) in relative humidity instrument 12 shows the three-phase enclosed busbars, this relative humidity signal input control cabinet 10, the utility model moves under the air circulation drying mode.At this moment, start air blast 2 through the automatic or manual mode, valve with electrically motorized operation II5 opens, and valve with electrically motorized operation III6 closes, and valve with electrically motorized operation I4 partly opens tonifying Qi.Air in 3 pairs of circulation circuits of dried-air drier carries out continual dry decontamination.The direction of arrow among Fig. 1 is the direction that air circulation flows.

As shown in Figure 2, after relative humidity drops to a certain degree in the three-phase enclosed busbar shell 1A, this relative humidity signal input control cabinet 10, the utility model is converted to the pressure-fired working method through the automatic or manual mode, at this moment, air blast 2 remains in operation, valve with electrically motorized operation I4, valve with electrically motorized operation III6 opens, valve with electrically motorized operation II5 closes, air blast 2 inputs suck air by valve with electrically motorized operation I4, and the pressure-air of air blast 2 outputs is sent in the three-phase enclosed busbar shell 1A after by dried-air drier 3 dryings, in case when the air pressure of air blast 2 outputs exceeds the safe range of setting, safety valve 14 discharge section high pressure gas avoid destroying three-phase enclosed busbar shell 1A.Air gauge 11 controls in the controlled case 10 of whole gas replenishment process keep in the pressure-fired scope of 300～2500Pa the air pressure in the three-phase enclosed busbar shell 1A, and the direction of arrow among Fig. 2 is the flow direction of air in the pressure-fired working method.Dried-air drier 3 adopts D and E two dry regeneration tubes, switch operatings in turn.

In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.

Claims

1. anti-condensation drying system of isolated-phase enclosed bus, comprise the three-phase enclosed busbar, air blast, dried-air drier, valve with electrically motorized operation I, valve with electrically motorized operation II, valve with electrically motorized operation III, break valve I, break valve II, safety valve, control cabinet, it is characterized in that, described valve with electrically motorized operation I one end leads to atmosphere, the valve with electrically motorized operation I other end respectively with valve with electrically motorized operation II one end, the air blast input links to each other, the air blast output links to each other with the dried-air drier input, the dried-air drier output communicates with three-phase enclosed busbar shell air inlet pipeline by break valve I, three-phase enclosed busbar shell return line communicates with the valve with electrically motorized operation II other end by break valve II, and valve with electrically motorized operation III is communicated with three-phase enclosed busbar shell air inlet pipeline and three-phase enclosed busbar shell return line.

2. the anti-condensation drying system of isolated-phase enclosed bus according to claim 1 is characterized in that, described three-phase enclosed busbar shell links to each other with relative humidity instrument, air gauge, safety valve respectively.