CN106786231B - The online restorative procedure of insulation performance and device during a kind of cross-inked polyethylene power cable operation - Google Patents
The online restorative procedure of insulation performance and device during a kind of cross-inked polyethylene power cable operation Download PDFInfo
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- CN106786231B CN106786231B CN201710110834.1A CN201710110834A CN106786231B CN 106786231 B CN106786231 B CN 106786231B CN 201710110834 A CN201710110834 A CN 201710110834A CN 106786231 B CN106786231 B CN 106786231B
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- storage tank
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- 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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/16—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for repairing insulation or armouring of cables
Abstract
The invention discloses insulation performance online restorative procedure during a kind of operation of cross-inked polyethylene power cable and devices, belong to cable insulation and repair field.The online restorative procedure is in cable operational process, reparation liquid is filled with to cable, both to provide electric field in cable repair process, open water tree channel, make repairing effect more preferable, and shorten the cable interruption maintenance time, simultaneously, cable is in work with repairing two states, improves cable operational reliability.The characteristics of this repair mode is to apply electric field action to cable, improve cable repairing effect, it is obviously shortened the cable interruption maintenance time, to repairing effect long-term in cable and long range, the repairing effect of the cable of small bore is good, has the advantages that technologically advanced, safety and stability, at low cost, applied widely.
Description
Technical field
The present invention relates to the online restorative procedures and dress of cross-inked polyethylene power cable insulation performance when making alive is run
It puts, belongs to cable insulation and repair field, the reparation available for the cross-inked polyethylene power cable after long-play insulation ag(e)ing
In engineering.
Technical background
Crosslinked polyethylene (XLPE) power cable has reliable electrical, mechanical performance, therefore in China's urban distribution network
It is widely used.But with the increase of the cable operation time limit, the crosslinked polyethylene that China largely uses in the nineties
Cable steps into the degradation failure high-incidence season.The power cable manufacturing process of early stage is not high and water proofing property is bad, in cable body
So inevitable that have some microdefects, these defects often become the initiation point of water tree.With the growth of water tree, electricity can be caused
Tree, leads to insulation breakdown.Although the appearance of novel water tree resistance cable causes water tree to largely reduce, the water tree of early stage is old
Change cable and be embedded in underground, and most of cable concentrates on inner city, huge quantities will be generated by replacing aging cable
And enormous expenditure.Therefore, the defective place in part is repaired, so as to extend cable service life, it will save huge
Financial resource and material resource have a very important significance.
It repairs liquid injection technique and proposes the use experience for having 20 years so far, experienced two generation techniques, repaired and be up to
100000 kilometers of water-treeing cable.First generation technique is 841 technologies, and Principles are the reparation liquid that main component is siloxanes
Hydrolysis-condensation reaction occurs with the moisture inside XLPE power cables under the effect of the catalyst, consumes water in power cable
Point, reaction product is filled with microvoid, so as to extend cable life.First generation cable recovery technique experienced 10 years or so
Time, it has been proved by practice that water-treeing cable effectively extends 10 to 15 years (Glen of cable life after injecting the reparation liquid
J.Bertini and GaryA.Vincent.Cable Rejuvention Mechanisms.ICC Subcommittee A,
March 14,2006.).But 841 technologies still have insufficient place：Although first, performance under short-term load of the reparation liquid to insulation
Promoted with obvious effects, but longer period is bad, second is that it is inconsistent due to repairing diffusion coefficient of the liquid various composition in cable,
Cause to repair liquid and the hydrolysis of water is incomplete, third, the flash-point for repairing liquid is low, there are security risk, fourth, reaction time mistake
It is long, increase the cable interruption maintenance time.
United States Patent (USP) US7331806B2 discloses a kind of cable connector with internal reservoir, inside the connector
Multi-cavity structure is designed as, extends and repairs time of the liquid by cable, and external environment can be reduced to repairing liquid process
It influences.But the internal structure of this design is complicated, production cost is high, expensive, and restorative procedure is complicated, and Technique Popularizing is very
It is difficult.
Cable recovery technique is still in the starting stage in China.Chinese patent 200410072791.5 discloses a kind of electric power
Cable repairing liquid injection system, the patent realize the control of the flow velocity, injection rate to repairing liquid.But this technology still has
Following deficiency：First, with reparation liquid injection process, inert pressure is gradually reduced in gas pressure tank, the situation of long-term repair
It can not ensure that the injection pressure for repairing liquid is constant down, weaken repairing effect；Second is that the patent needs centainly after repairing liquid injection
Time ensure to repair effective infiltration of liquid, and reacted with water, power off time is long, increases the time of cable interruption maintenance.
Invention content
The purpose of the present invention is in view of the deficiencies of the prior art and provide a kind of XLPE cable pressurize run when it is online
The method of reparation, its main feature is that during reparation, being repaired cable can continue to run with and power use.In electric field action
Under, water tree channel is opened, and is more advantageous to repairing liquid and is infiltrated into water tree area and react with water, next, reparation liquid under electric field action more
Migration and movement are easily kept, faster, strength of fluid is more preferable for seepage velocity, can effectively improve cable repairing effect.
The present invention is achieved through the following technical solutions：
Insulation performance online restorative procedure during a kind of cross-inked polyethylene power cable operation, which is characterized in that in banded cable
During electricity operation, reparation liquid is filled with to cable.
Alternately, in above-mentioned online restorative procedure, the liquid of repairing is using Publication No. CN101866706's
Any one cross-linked polyethylene power cable nano repairing liquid disclosed in Chinese patent application.
Alternately, it is specially in above-mentioned online restorative procedure：First in the power-off state by multiple-cable both ends to be repaired
It is connected with repairing liquid injection device, reparation liquid is made to penetrate into inside cable, and ensures that the reparation liquid injection device can continue
Reparation liquid, combined floodgate power transmission are filled with, and reparation liquid injection state is kept in galvanization to multiple-cable to be repaired.
Alternately, in above-mentioned online restorative procedure, dismounting cable both ends are with repairing after the completion of being additionally included in reparation
The operation of connection between multiple liquid injection device.
Alternately, in above-mentioned online restorative procedure, it is described in the power-off state by multiple-cable both ends to be repaired with
Repairing the operation that liquid injection device is connected is specially：Cable termination copper lug to be repaired is connect with insulation interlayer gap and conductor
Pipe is exposed with insulation layer gap, terminal adapter is set at the terminal fitting at cable both ends, by the terminal adapter
Gap between both ends and multiple-cable outer surface to be repaired, which is sealed processing, (ensures that repairing liquid enters behind the both ends of adapter inner cavity not
Can be oozed out from the both ends of adapter) so that the copper lug and insulation that adapter inner cavity can be exposed with cable termination to be repaired
Interlayer gap and conductor connecting tube are connected with insulation layer gap, and the reparation liquid injection that formation runs through multiple-cable both ends to be repaired is logical
Road, then by the reparation liquid injection hole on adapter with repair liquid injection device be connected, so as to make reparation liquid energy by injection hole into
Enter the note adapter inner cavity.
Alternately, in above-mentioned online restorative procedure, the encapsulation process is specially：Pressurization clamping or encryption envelope
Glue heat cure handles or winding band.
Alternately, in above-mentioned online restorative procedure, following steps are specifically included：
(1) it powers off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
(2) prosthetic device connects
It is under power failure, cable termination copper lug and insulation interlayer gap and conductor connecting tube is sudden and violent with insulation layer gap
Expose, terminal adapter is mounted at the terminal fitting at cable both ends, the reparation liquid injection hole on adapter passes through hose
It is connected with repairing liquid storage tank；
(3) preprosthetic preparation
After connecting prosthetic device, cable and reparation liquid storage tank are detected, to judge whether fortuitous event occur,
It interrupts reparation in time when occurring, ensures equipment safety；
(4) liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, reparation liquid is made to be injected from the outflow of liquid storage tank is repaired through hose
To adapter, (preferably 4 hours) are kept for or so 3-5 hour, reparation liquid is made to penetrate into inside cable；
(5) combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, and cable termination copper lug is restored, before cable combined floodgate power transmission, according to
Power cable operational safety regulation is closed a floodgate power transmission after being tested；
(6) terminate to repair
After 1-3 months (preferably 2 months), the cable repaired online is had a power failure, is carried out according to power cable operating standard
Safety measure under power failure, removes adapter, repairs flow container and stent, completes to repair.
Alternately, in above-mentioned online restorative procedure, following steps are specifically included：
(1) it powers off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
(2) prosthetic device connects
Under power failure, supporting rack made of the insulating materials such as wooden or plastics is installed near cable termination, by band
The reparation flow container of fluid level indicator and pressure-equalizing pipe is hung on supporting rack, then, by cable termination copper lug and insulating layer
Between gap and conductor connecting tube be exposed with insulation layer gap, terminal adapter is mounted on to the terminal fitting at cable both ends
Locate, the reparation liquid injection hole on adapter is connected by hose with repairing liquid storage tank, and storage tank is suspended on higher than cable termination
Position；
(3) preprosthetic preparation
After connecting prosthetic device, cable and reparation flow container are detected, to judge whether fortuitous event occur, gone out
Current interrupt in time is repaired, and ensures equipment safety；
(4) liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, observes and repairs liquid from the outflow of liquid storage tank is repaired, through hose
Adapter is injected into, is kept for or so 4 hours, reparation liquid is made to penetrate into inside cable；
(5) combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, and cable termination copper lug is restored, before cable combined floodgate power transmission, according to
Power cable operational safety regulation is closed a floodgate power transmission after being tested；
(6) terminate to repair
After 2 months, the cable repaired online is had a power failure, safety measure is carried out according to power cable operating standard, is having a power failure
Under state, adapter is removed, repairs flow container and stent.
The invention discloses a kind of device for above-mentioned online restorative procedure, including repairing liquid storage tank, conduit and electricity
Cable terminal adapter, the conduit are used to the reparation liquid injection hole with the reparation liquid storage tank liquid outlet being connected；It is described
Be provided with the reparation liquid injection hole connected with its inner cavity on adapter, the conduit be used for by the reparation liquid injection hole with it is described
Liquid storage tank liquid outlet is repaired to be connected.
Alternately, in above-mentioned online prosthetic device, the adapter is cylindrical in shape, containing in the perforation of both ends
Chamber, the interior chamber size match with the outside diameter of cable to be repaired, can be sleeved at the terminal fitting of multiple-cable to be repaired.
Alternately, the adapter is provided at both ends with clamp device, and the clamp device is by the adapter two
It is peripheral in multiple-cable to be repaired that end tightening fixes it, thus will be between the terminal adapter both ends and multiple-cable outer surface to be repaired
Gap be sealed, prevent from repairing the exudation of liquid adapter both ends.
Alternately, the adapter has the folding seam that the other end is extended to from one end.By by the folding
Seam, which is opened, can increase adapter bore, and suit is facilitated to operate, and again stitch the folding after being installed in place and be closed, convenient for being formed
Closed adapter inner cavity.
Alternately, the adapter has the split structure cutd open along its axis direction point.Using split type knot
Liang Fen splits mechanism is directly sealed processing by structure again in cable socket split to be repaired when mounted, is both easily installed, just
In the adapter inner cavity that formation is closed.Further, the encapsulation process is specially：At pressurization clamping or encryption sealing heat cure
Reason or winding band.
Alternately, in above-mentioned online prosthetic device, the adapter quantity is at least 2, for respectively with
Adaptation connection is carried out at two terminal fittings of multiple-cable to be repaired,
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank is with repairing liquid pusher phase
Even.The reparation liquid pusher can be air pressure or hydraulic pressure or pressure pusher electronic or that other are common, can incite somebody to action
The reparation liquid storage tank continues for the purpose of being injected into multiple-cable to be repaired.
Alternately, it in above-mentioned online prosthetic device, further includes to hang the branch for repairing liquid storage tank
Support.Further, support frame as described above repairs liquid certainly for storage tank to be suspended on to the position higher than cable termination convenient for passing through
The gravity of body is persistently injected into liquid is repaired in multiple-cable to be repaired.Further, support frame as described above is by insulating materials system
Into such as using wooden or plastic support frame.
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank, which is provided with, repairs liquid addition mouth.
Convenient for supplementing reparation liquid at any time.
Alternately, in above-mentioned online prosthetic device, the reparation liquid injection hole and the reparation liquid storage tank
Switch is provided on pipeline between liquid outlet.Further, the switch is arranged on conduit.
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank carries fluid level indicator.For
Indicate the actual liquid level situation in the reparation liquid storage tank.
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank carries pressure-equalizing pipe.For
Balance the reparation liquid storage tank inner and outer air pressure.Further, the pressure-equalizing pipe is inserted from the reparation liquid storage pot bottom
Enter, into repair liquid storage tank inside pressure balance tube wall on be provided with scale, as fluid level indicator, the reparation liquid
It at least with the tank body of the fluid level indicator corresponding part is transparent to store in pot bottom.
All features or disclosed all methods disclosed in this specification or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Beneficial effects of the present invention：
The technology can carry out cable to repair liquid injection reparation, when shortening cable interruption maintenance in cable operational process
Between, improve repairing effect, hence it is evident that shorten the cable interruption maintenance time, it is good to repairing effect long-term in cable, particularly with grow away from
From the cable repairing effect of small bore is good, has the advantages that technologically advanced, safety and stability, at low cost, applied widely.
Description of the drawings：
Insulation performance online prosthetic device structure diagram when Fig. 1 is run for cross-inked polyethylene power cable；
Fig. 2 repairs terminal adapter schematic diagram to be online；
Fig. 3 is water tree length box statistical chart in cable sample under microscope；
Fig. 4 is the microscopic appearance in water tree area in cable sample under scanning electron microscope, wherein (a), which is disposable injection, repairs liquid
The microscopic appearance in cable sample water tree area, (b) are the online water tree area microscopic appearance for repairing cable sample.
Reference numeral：1 is supporting rack, and 2 is repair liquid storage tank, and 3 be conduit, and 4 be copper lug, and 5 be adapter, and 6 be ground
Face, 7 be liquid level display, and 8 be switch, and 9 be pressure-equalizing pipe, and 10 be cable, and 11 be cable core, and 12 be band.
Specific embodiment：
Specific embodiment by the following examples is again described in further detail the above of the present invention.But
The range that this should not be interpreted as to the above-mentioned theme of the present invention is only limitted to following example.In the spirit and original for not departing from the present invention
Any modification made within then and the equivalent replacement made according to ordinary skill knowledge and customary means change
Into should all include within the scope of the present invention..
Embodiment 1
Insulation performance online prosthetic device during a kind of cross-inked polyethylene power cable operation, including repairing liquid storage tank, leads
Pipe and cable termination adapter, the conduit are used for the reparation liquid injection hole and the reparation liquid storage tank liquid outlet phase
Even；The reparation liquid injection hole connected with its inner cavity is provided on the adapter, the conduit is used for the reparation liquid injection
Hole is connected with the reparation liquid storage tank liquid outlet.
Alternately, in above-mentioned online prosthetic device, the adapter is cylindrical in shape, containing in the perforation of both ends
Chamber, the interior chamber size match with the outside diameter of cable to be repaired, can be sleeved at the terminal fitting of multiple-cable to be repaired.
Alternately, the adapter is provided at both ends with clamp device, and the clamp device is by the adapter two
It is peripheral in multiple-cable to be repaired that end tightening fixes it, thus will be between the terminal adapter both ends and multiple-cable outer surface to be repaired
Gap be sealed, prevent from repairing the exudation of liquid adapter both ends.
Alternately, the adapter has the folding seam that the other end is extended to from one end.By by the folding
Seam, which is opened, can increase adapter bore, and suit is facilitated to operate, and again stitch the folding after being installed in place and be closed, convenient for being formed
Closed adapter inner cavity.
Alternately, the adapter has the split structure cutd open along its axis direction point.Using split type knot
Liang Fen splits mechanism is directly sealed processing by structure again in cable socket split to be repaired when mounted, is both easily installed, just
In the adapter inner cavity that formation is closed.Further, the encapsulation process is specially：At pressurization clamping or encryption sealing heat cure
Reason or winding band.
Alternately, in above-mentioned online prosthetic device, the adapter quantity is at least 2, for respectively with
Adaptation connection is carried out at two terminal fittings of multiple-cable to be repaired,
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank is with repairing liquid pusher phase
Even.The reparation liquid pusher can be air pressure or hydraulic pressure or pressure pusher electronic or that other are common, can incite somebody to action
The reparation liquid storage tank continues for the purpose of being injected into multiple-cable to be repaired.
Alternately, it in above-mentioned online prosthetic device, further includes to hang the branch for repairing liquid storage tank
Support.Further, support frame as described above repairs liquid certainly for storage tank to be suspended on to the position higher than cable termination convenient for passing through
The gravity of body is persistently injected into liquid is repaired in multiple-cable to be repaired.Further, support frame as described above is by insulating materials system
Into such as using wooden or plastic support frame.
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank, which is provided with, repairs liquid addition mouth.
Convenient for supplementing reparation liquid at any time.
Alternately, in above-mentioned online prosthetic device, the reparation liquid injection hole and the reparation liquid storage tank
Switch is provided on pipeline between liquid outlet.Further, the switch is arranged on conduit.
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank carries fluid level indicator.For
Indicate the actual liquid level situation in the reparation liquid storage tank.
Alternately, in above-mentioned online prosthetic device, the reparation liquid storage tank carries pressure-equalizing pipe.For
Balance the reparation liquid storage tank inner and outer air pressure.Further, the pressure-equalizing pipe is inserted from the reparation liquid storage pot bottom
Enter, into repair liquid storage tank inside pressure balance tube wall on be provided with scale, as fluid level indicator, the reparation liquid
It at least with the tank body of the fluid level indicator corresponding part is transparent to store in pot bottom.
In use, first in the power-off state by cable termination copper lug to be repaired and insulation interlayer gap and conductor connecting tube
It is exposed with insulation layer gap, terminal adapter is set at the terminal fitting at cable both ends, by the terminal adapter two
Gap between end and multiple-cable outer surface to be repaired, which is sealed processing, (ensures that reparation liquid will not after entering adapter inner cavity both ends
Oozed out from the both ends of adapter) so that the copper lug and insulating layer that adapter inner cavity can be exposed with cable termination to be repaired
Between gap and conductor connecting tube be connected with insulation layer gap, formed run through multiple-cable both ends to be repaired the injection of reparation liquid it is logical
Road, then by the reparation liquid injection hole on adapter with repair liquid injection device be connected, so as to make reparation liquid energy by injection hole into
Enter the note adapter inner cavity, the line prosthetic device is removed after the completion of repairing.
Embodiment 2
Crosslinked polyethylene repairs example online
(1) it powers off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
(2) prosthetic device connects
Under power failure, supporting rack made of the insulating materials such as wooden or plastics is installed near cable termination, by band
The reparation flow container of fluid level indicator and pressure-equalizing pipe is hung on supporting rack, then, by cable termination copper lug and insulating layer
Between gap and conductor connecting tube be exposed with insulation layer gap, terminal adapter is mounted on to the terminal fitting at cable both ends
Locate, the reparation liquid injection hole on adapter is connected by hose with repairing liquid storage tank, and storage tank is suspended on higher than cable termination
Position；
(3) preprosthetic preparation
After connecting prosthetic device, cable and reparation flow container are detected, to judge whether fortuitous event occur, gone out
Current interrupt in time is repaired, and ensures equipment safety；
(4) liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, observes and repairs liquid from the outflow of liquid storage tank is repaired, through hose
Adapter is injected into, is kept for or so 4 hours, reparation liquid is made to penetrate into inside cable；
(5) combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, and cable termination copper lug is restored, before cable combined floodgate power transmission, according to
Power cable operational safety regulation is closed a floodgate power transmission after being tested；
(6) terminate to repair
After 2 months, the cable repaired online is had a power failure, safety measure is carried out according to power cable operating standard, is having a power failure
Under state, adapter is removed, repairs flow container and stent.
For the ease of comparison, in the present embodiment, select disclosed in the Chinese patent application of Publication No. CN101866706
Cross-linked polyethylene power cable nano repairing liquid.
Comparative example 1：Liquid reparation is repaired in disposable injection
The restorative procedure with reference to disclosed in the Chinese patent application of Publication No. CN101866706 carries out disposable injection and repairs
Liquid reparation.
Comparative example 2：Liquid reparation is repaired in the disposable injection of time lengthening
Soaking time is extended to repairing the repair time phase in example online on the basis of 1 the method for comparative example
With (2 months).
Repair mechanisms and performance test
Liquid is repaired to penetrate into cross-inked polyethylene power cable in the micropore of insulating layer, under the effect of the catalyst,
It reacts with water, forms colloid substance by water tree micropore filling in cable, defect in insulating layer is enable to repair, while can press down
Water tree further growth processed.
The reparation liquid being injected into repair process inside adapter from copper lug and insulation interlayer gap, penetrates into cable
In insulating layer.
Under the action of electric field, the elasticity that crosslinked polyethylene molecule has causes water tree interface channel to be opened, water tree channel
After opening, repair liquid and be able to faster penetrate into water tree channel and reacted with water.And electric field is also to the reparation liquid of low pole
Molecule generates electric field force, so as to accelerate the infiltration for repairing liquid so that the repairing effect under in the case of cable electrification is more excellent.And
Line reparation reduces the time of interruption maintenance, greatly improves economic benefit and operation stability.Laboratory online repair with
Disposable injection repairs the repairing effect comparison of liquid as shown in Figure 3,4.Fig. 3 is new cable in laboratory, disposable injection reparation
Water tree length box statistical chart in the cable of liquid and online reparation cable sample.According to fig. 3 as can be seen that repairing cable online
Water tree length is most short in sample, and water tree length is taken second place in 1 gained sample of comparative example, and does not repair the water tree length in sample most
It is long.For water tree length between 170-260 μm, average length is 232.27 μm in online reparation sample.Water in 1 gained of comparative example
Length is set between 190-300 μm, average length is 250.57 μm.And do not repair in sample water tree length 260-410 μm it
Between, average length is 338.53 μm.Online injection repairs the disposable pre-implant of liquor ratio and repairs liquid to water tree in cable insulation
Growth inhibitory effect becomes apparent from.Fig. 4 compared disposably injecting using scanning electron microscope repairs liquid with repairing in cable sample online
The microscopic appearance in water tree area.As seen from Figure 4, the micropore profile in disposable injection reparation liquid sample water tree region is shallower, counts
It measures less, and has particulate filler substance of a small amount of size in the micron order of magnitude, and repair the micropore in sample water tree region online
Quantity is seldom and profile is more fuzzy, and filler particles are smaller but distribution uniform.It can be seen that with Fig. 4 and repair online according to fig. 3
It is more preferable to the repairing effect of cable that compound ratio disposably injects reparation liquid.Repairing effect described in comparative example 2 and 1 basic phase of comparative example
When equally significantly not as good as online repairing effect.Results of statistical analysis shows that above-mentioned difference is respectively provided with statistical significance.
Embodiment 3：
Any one online prosthetic device described in embodiment 1 is selected, first in the power-off state by multiple-cable two to be repaired
End is connected with prosthetic device, and reparation liquid is made to penetrate into inside cable, and ensures that the liquid injection device of repairing can continue to treating
It repairs cable and is filled with reparation liquid, combined floodgate power transmission, and reparation liquid injection state is kept in galvanization, repair (2 after a period of time
A month), the online prosthetic device is removed in power-off.
Embodiment 4：
Any one online prosthetic device described in embodiment 1 is selected, follows the steps below online reparation.
(1) it powers off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
(2) prosthetic device connects
It is under power failure, cable termination copper lug and insulation interlayer gap and conductor connecting tube is sudden and violent with insulation layer gap
Expose, terminal adapter is mounted at the terminal fitting at cable both ends, the reparation liquid injection hole on adapter passes through hose
It is connected with repairing liquid storage tank；
(3) preprosthetic preparation
After connecting prosthetic device, cable and reparation liquid storage tank are detected, to judge whether fortuitous event occur,
It interrupts reparation in time when occurring, ensures equipment safety；
(4) liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, reparation liquid is made to be injected from the outflow of liquid storage tank is repaired through hose
To adapter, kept for or so 3 hours, reparation liquid is made to penetrate into inside cable；
(5) combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, and cable termination copper lug is restored, before cable combined floodgate power transmission, according to
Power cable operational safety regulation is closed a floodgate power transmission after being tested；
(6) terminate to repair
After 1 month, the cable repaired online is had a power failure, safety measure is carried out according to power cable operating standard, is having a power failure
Under state, adapter is removed, repairs flow container and stent, completes to repair.
Embodiment 5：
Any one online prosthetic device described in embodiment 1 is selected, follows the steps below online reparation.
(1) it powers off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
(2) prosthetic device connects
It is under power failure, cable termination copper lug and insulation interlayer gap and conductor connecting tube is sudden and violent with insulation layer gap
Expose, terminal adapter is mounted at the terminal fitting at cable both ends, the reparation liquid injection hole on adapter passes through hose
It is connected with repairing liquid storage tank；
(3) preprosthetic preparation
After connecting prosthetic device, cable and reparation liquid storage tank are detected, to judge whether fortuitous event occur,
It interrupts reparation in time when occurring, ensures equipment safety；
(4) liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, reparation liquid is made to be injected from the outflow of liquid storage tank is repaired through hose
To adapter, kept for or so 5 hours, reparation liquid is made to penetrate into inside cable；
(5) combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, and cable termination copper lug is restored, before cable combined floodgate power transmission, according to
Power cable operational safety regulation is closed a floodgate power transmission after being tested；
(6) terminate to repair
After 3 months, the cable repaired online is had a power failure, safety measure is carried out according to power cable operating standard, is having a power failure
Under state, adapter is removed, repairs flow container and stent, completes to repair.
It is similar with the repairing effect comparing result in embodiment 2, the reparation effect of example is repaired under each line described in embodiment 3-5
Fruit is significantly better than that the repairing effect that the equal time is repaired using disposable injection.
The foregoing is merely the preferred embodiment of the present invention, are merely illustrative for the purpose of the present invention, and not restrictive；
Those of ordinary skill in the art understand that can carry out many to it in the spirit and scope limited in the claims in the present invention changes
Become, modification or even equivalent change, but fall within protection scope of the present invention.
Claims (10)
1. insulation performance online restorative procedure during a kind of cross-inked polyethylene power cable operation, which is characterized in that this method is specific
For：First multiple-cable both ends to be repaired with repairing liquid injection device are connected in the power-off state, reparation liquid is made to penetrate into inside cable,
And ensure that the reparation liquid injection device can continue to be filled with reparation liquid to multiple-cable to be repaired, combined floodgate power transmission, and in galvanization
It is middle to keep repairing liquid injection state.
2. online restorative procedure according to claim 1, which is characterized in that be additionally included in dismounting cable two after the completion of reparation
It holds with repairing the operation being connect between liquid injection device.
3. online restorative procedure according to claim 1, which is characterized in that described in the power-off state by multiple-cable to be repaired
Both ends are specially with repairing the operation that liquid injection device is connected：Cable termination copper lug to be repaired and insulation and are led at interlayer gap
Body connecting tube is exposed with insulation layer gap, and suit is fitted with the terminal for repairing liquid injection hole at the terminal fitting at cable both ends
Gap between the terminal adapter both ends and multiple-cable outer surface to be repaired is sealed processing by orchestration, then will adaptation
Reparation liquid injection hole on device is connected with repairing liquid injection device, so as to which reparation liquid energy be made to enter the terminal adaptation by injection hole
Device inner cavity.
4. online restorative procedure according to claim 3, which is characterized in that the encapsulation process is specially：Pressurization clamping
Or encrypt seal adhesive hot curing process or winding band.
5. online restorative procedure according to claim 1, which is characterized in that this method includes the following steps：
（1）Power-off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
（2）Prosthetic device connects
Under power failure, cable termination copper lug and insulation interlayer gap and conductor connecting tube are exposed with insulation layer gap
Come, terminal adapter is mounted at the terminal fitting at cable both ends, the reparation liquid injection hole on adapter is by hose with repairing
Multiple liquid storage tank is connected；
（3）Preprosthetic preparation
After connecting prosthetic device, cable and reparation liquid storage tank are detected, to judge whether fortuitous event occur, gone out
Current interrupt in time is repaired, and ensures equipment safety；
（4）Liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, reparation liquid is made to be injected into from the outflow of liquid storage tank is repaired through hose suitable
Orchestration is kept for or so 3-5 hour, reparation liquid is made to penetrate into inside cable；
（5）Combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, cable termination copper lug is restored, before cable combined floodgate power transmission, according to electric power
Cable operational safety regulation is closed a floodgate power transmission after being tested；
（6）Terminate to repair
After 1-3 months, the cable repaired online is had a power failure, safety measure is carried out according to power cable operating standard, in power failure shape
Under state, adapter is removed, repairs flow container and stent, completes to repair.
6. online restorative procedure according to claim 1, which is characterized in that this method includes the following steps：
（1）Power-off
Required reparation cable is had a power failure, safety measure is carried out according to power cable operating standard；
（2）Prosthetic device connects
Under power failure, the supporting rack made of installation insulating materials near cable termination will be with fluid level indicator and pressure
The reparation flow container of balance pipe is hung on supporting rack, and then, cable termination copper lug is connect with insulation interlayer gap and conductor
Pipe is exposed with insulation layer gap, terminal adapter is mounted at the terminal fitting at cable both ends, the reparation on adapter
Liquid injection hole is connected by hose with repairing liquid storage tank, and storage tank is suspended on the position higher than cable termination；
（3）Preprosthetic preparation
After connecting prosthetic device, cable and reparation flow container are detected, to judge whether fortuitous event occur, when occurring
It interrupts and repairs in time, ensure equipment safety；
（4）Liquid is repaired in injection
The reparation liquid storage tank switch at cable both ends is opened, observes and repairs liquid from the outflow of liquid storage tank is repaired, injected through hose
To adapter, kept for or so 4 hours, reparation liquid is made to penetrate into inside cable；
（5）Combined floodgate power transmission
Prosthetic device keeps repairing liquid injection state, cable termination copper lug is restored, before cable combined floodgate power transmission, according to electric power
Cable operational safety regulation is closed a floodgate power transmission after being tested；
（6）Terminate to repair
After 2 months, the cable repaired online is had a power failure, safety measure is carried out according to power cable operating standard, in power failure
Under, adapter is removed, repairs flow container and stent.
7. online restorative procedure according to claim 6, which is characterized in that step（2）Described in insulating materials for wood
Matter or plastics.
8. online restorative procedure according to claim 1, which is characterized in that the online restorative procedure used repaiies online
Apparatus for coating include supporting rack, repair liquid storage tank, conduit, adapter, support frame as described above for hang it is described reparation liquid storage tank,
The adapter quantity is at least 2, described for being connect respectively with carrying out adaptation at two terminal fittings of multiple-cable to be repaired
Be provided with the reparation liquid injection hole connected with its inner cavity on adapter, the conduit be used for by the reparation liquid injection hole with it is described
Liquid storage tank liquid outlet is repaired to be connected.
9. online restorative procedure according to claim 8, which is characterized in that the reparation liquid injection hole and the reparation liquid
Switch is provided on pipeline between storage tank liquid outlet.
10. online restorative procedure according to claim 8, which is characterized in that the reparation liquid storage tank refers to liquid level
Show device and pressure-equalizing pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710110834.1A CN106786231B (en) | 2017-02-28 | 2017-02-28 | The online restorative procedure of insulation performance and device during a kind of cross-inked polyethylene power cable operation |
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| CN201710110834.1A CN106786231B (en) | 2017-02-28 | 2017-02-28 | The online restorative procedure of insulation performance and device during a kind of cross-inked polyethylene power cable operation |
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| CN112165019B (en) * | 2020-09-22 | 2022-02-18 | 南方电网科学研究院有限责任公司 | Connector and repair device for bad electrical contact inside high-voltage cable |
| CN112202012B (en) * | 2020-09-22 | 2022-02-18 | 华南理工大学 | Connector and repair device for bad electrical contact inside high-voltage cable |
| CN112198396B (en) * | 2020-10-10 | 2022-02-01 | 广东海洋大学 | Ship cable water tree restoration performance evaluation method |
| CN112864968B (en) * | 2021-01-18 | 2022-11-29 | 天津大学 | High-pressure crosslinked polyethylene cable buffer layer repairing device and repairing method thereof |
| CN113471889B (en) * | 2021-05-28 | 2022-10-14 | 国网河北省电力有限公司临漳县供电分公司 | Cable repairing device and cable repairing method |
| CN113629600B (en) * | 2021-08-04 | 2023-06-13 | 中广核研究院有限公司 | Cable repair adapter and cable repair method |
| CN114594350B (en) * | 2022-03-16 | 2024-10-18 | 重庆大学 | Simulation test device for insulation repair under external injection of power cable and method for insulation repair evaluation |
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| CN102709850B (en) * | 2012-06-15 | 2015-01-21 | 四川电力科学研究院 | Power cable insulation repairing method |
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| US7331806B2 (en) * | 2004-08-25 | 2008-02-19 | Utilx Corporation | Cable connectors with internal fluid reservoirs |
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| CN102709850B (en) * | 2012-06-15 | 2015-01-21 | 四川电力科学研究院 | Power cable insulation repairing method |
| CN105375409A (en) * | 2015-10-30 | 2016-03-02 | 深圳市沃尔核材股份有限公司 | Cable accessory branching fingerstall restoration method |
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