CN103606832A

CN103606832A - On-spot leakage detection and blocking technique of whole-sealing combination electric appliance

Info

Publication number: CN103606832A
Application number: CN201310623730.2A
Authority: CN
Inventors: 王红艳; 王薇
Original assignee: Anyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Anyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2013-12-01
Filing date: 2013-12-01
Publication date: 2014-02-26

Abstract

The invention discloses an on-spot leakage detection and blocking technique of a whole-sealing combination electric appliance and belongs to the technical field of electric power. According to the technical scheme, leakage points of different SF6 gas leakage portions existing in operation of the whole-sealing combination electric appliance are accurately detected by flexibly utilizing the comprehensive monitoring method, the pressure lowering analyzing method, the segmentation positioning method, the local accumulation method, the soap bubble method, the sealing gum method and the like in an on-spot mode, and therefore leakage blocking processing techniques such as strict techniques, welding joint repairing, sample stamping and blocking, pressing cap additionally arranging and part replacing can be implemented in a targeted mode, and equipment operation is fast recovered. The on-spot leakage detection and blocking technique of the whole-sealing combination electric appliance has the advantages of being simple, convenient to use, easy to perform, accurate and fast in leakage detection, capable of lowering the blindness, simple and effective in leakage blocking, capable of reducing the workload, low in maintaining cost, high in maintenance efficiency, capable of reducing outage of equipment and ensuring safety operation of the equipment and obvious in social and economic benefit.

Description

The on-the-spot leak detection of a kind of fully closed combined electric unit, leak-stopping technique method

Technical field

The on-the-spot leak detection of a kind of simple and easy to do fully closed combined electric unit, leak-stopping technique method belong to technical field of electricity.

Background technology

Fully closed combined electric unit is that GIS is that to utilize the sulfur hexafluoride gas with excellent insulation property be SF ₆gas is as insulation and arc-extinguishing medium, each electric equipment is connected to form to an integral body successively, all be encapsulated in a kind of novel high-pressure electrical equipment in sealed up metal ground connection housing, there is miniaturization, component module, the distinguishing feature such as reliability is high, arc extinguishing ability is strong, cooling characteristics good, installation period is short, long service life.But along with the increase of the operation time limit, equipment engenders SF ₆gas leakage problem, causes the gas pressure latch switch action that declines even, and air chamber water content is increased, and harm insulation, affect arc extinguishing, also can produce noxious substance, threat health of human body.For assurance equipment normally moves, SF has to before leak detection, leak stopping supplement ₆gas, increases maintenance cost.Current, the hunt leak leakiness position of multiplex highly sensitive probe detection equipment, leak stopping mostly is tightens fastening bolt, the Pressure gauge of changing gas leakage, seal, porcelain bushing etc., the requirement of can not meet site examining and repairing far away, stopping a leak, in the urgent need to comprehensively executing plan, innovation

The on-the-spot leak detection of a kind of simple and easy to do fully closed combined electric unit, leak-stopping technique method.

Summary of the invention

The present invention is directed to the SF of fully closed combined electric unit emerged in operation ₆the problem existing in Leakage Gas and existing leak detection, leak stopping, provides the leak detection of a kind of simple and easy to do scene, leak-stopping technique method.

Technical scheme of the present invention is: the SF by scene to fully closed combined electric unit emerged in operation ₆the different leakage positions of gas, adopt flexibly integrated supervision, pressure drop analysis, cut apart location, the method such as accumulate part, soap bubble method, fluid sealant method accurately detects leakage point, and then implement targetedly strict technology, repair welding weld seam, sample and block up in a state of excitement, install additional the leak stopping treatment process methods such as pressure cap, renewal part, restorer operation rapidly.

The invention has the beneficial effects as follows: simple and easy to do, leak detection accurately rapidly, reduces blindness, and leak stopping is simply effective, reduces workload, and recondition expense is low, and maintenance efficiency is high, greatly reduces equipment and stops transport, support equipment safe operation, society and remarkable in economical benefits.

Embodiment

Describe details of the present invention and the course of work in detail: we use the fully closed combined electric unit time of existing more than ten years, and the premium properties of equipment has obtained fully proving in running.But start the beginning of the year, there is SF in equipment in the past successively ₆gas leakage problem, causes the gas pressure latch switch action that declines even, and air chamber water content is increased, harm is insulated, is affected arc extinguishing, sometimes also produces noxious substance, threatens health of human body, As time goes on, leak more and more frequently, leakage point is also more and more.For assurance equipment normally moves, we grope to sum up in practice,

SF by scene to fully closed combined electric unit emerged in operation ₆the different leakage positions of gas, adopt flexibly integrated supervision, pressure drop analysis, cut apart location, the method such as accumulate part, soap bubble method, fluid sealant method accurately detects leakage point.Integrated supervision is exactly to fill in detail SF ₆gas tonifying Qi record, as once just there is leakage by preliminary judgement in less than palpus tonifying Qi in three months; If find in micro-water yield mensuration, micro-water number exceeds standard can judge that this air chamber exists leakage; After overhaul of the equipments, refitting vacuumizes, if find, vacuum degree does not reach for a long time requirement and can be determined with leakage existence; Equipment is the irritant stink in leeward or reproduce uncomfortablely especially around, can judge a large amount of Leakage Gas occur.Pressure drop analysis is exactly the gas pressure of each air chamber of periodic logging and compares with the former record under same ambient temperature, or carries out lateral comparison by temperature conversion, if force value declines, can be determined with leakage phenomenon.Cutting apart location is exactly the punishment of equipment leakiness to be slit into several parts such as apparatus body, weld seam, air chamber and instrument connector, circuit breaker sealing gasket with general leak detector, detect respectively again, reduces blindness.Accumulate part is exactly with Polypropylence Sheet, doubtful leakage position wrapping is tight, after a few hours, detects in Polypropylence Sheet whether have SF again with leak detector ₆gas, judges whether this position exists leakage.Soap bubble method is applicable to less leakage point, and the liquid soap mixing up is brushed at possibility leakage position with brush, occurs that outside bubbling place is exactly leakage point, and also available shampoo or liquid detergent replace liquid soap.Fluid sealant method is applicable to larger leakage point, and fluid sealant is evenly smeared along larger leak detection positions such as weld seams, and the place that occurs bubbling is exactly leak.We accurately detect after leakage point in order to upper method, so implement strict technology targetedly, repair welding weld seam, sample block up, install additional the leak stopping treatment process methods such as pressure cap, renewal part, restorer operation rapidly in a state of excitement.Strict technology is exactly standard maintenance craft, to concrete regulation and the quantification effectively supervising in addition of the technical standard of operating personnel's responsibility, execution and technological procedure.Repair welding weld seam is exactly that the leakage point of unlike material pipeline is carried out to repair welding with corresponding welding rod, and the leakage point at air chamber and instrument connector place is pulled down to the rear gas welding repair welding of using by instrument, again loads onto after errorless on inspection.It is exactly to the sand holes leakage point on apparatus body that sample blocks up in a state of excitement, is punched in sand holes stifled to centre punch successively with sample around, the stifled tight rear sealing leakage glue that covers.Installing pressure cap additional is that graphite grazing pad is damaged to the measure that causes leakage to take, under rated pressure, sealing ring itself is not bear pressure, only have sealing ring after graphite grazing pad breaks just to bear pressure, so install stainless steel pressure cap additional, can alleviate and vacuumize negative pressure and the damage of inflation malleation to graphite grazing pad.To true, belong to on-the-spot parts that cannot leak stopping, as valve, Pressure gauge, porcelain bushing etc., should resolutely be changed, complete leak stopping and process, restorer operation rapidly.Over the past two years, we adhered to above process and updated, and made equipment be able to safe operation, had greatly reduced equipment fault, had obtained good result.The scene leak detection of a kind of fully closed combined electric unit provided by the present invention, leak-stopping technique method, simple and easy to do, leak detection accurately rapidly, reduces blindness, and leak stopping is simply effective, reduce workload, recondition expense is low, and maintenance efficiency is high, greatly reduces equipment and stops transport, support equipment safe operation, society and remarkable in economical benefits.

Claims

1. the on-the-spot leak detection of fully closed combined electric unit, a leak-stopping technique method, is characterized in that: the SF by scene to fully closed combined electric unit emerged in operation ₆the different leakage positions of gas, adopt flexibly integrated supervision, pressure drop analysis, cut apart location, the method such as accumulate part, soap bubble method, fluid sealant method accurately detects leakage point, and then implement targetedly strict technology, repair welding weld seam, sample and block up in a state of excitement, install additional the leak stopping treatment process methods such as pressure cap, renewal part, restorer operation rapidly.