CN109768509A - Dedicated elbow-type connector, prosthetic device and method are repaired in power cable electrification - Google Patents
Dedicated elbow-type connector, prosthetic device and method are repaired in power cable electrification Download PDFInfo
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- CN109768509A CN109768509A CN201910215189.9A CN201910215189A CN109768509A CN 109768509 A CN109768509 A CN 109768509A CN 201910215189 A CN201910215189 A CN 201910215189A CN 109768509 A CN109768509 A CN 109768509A
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Abstract
Repair dedicated elbow-type connector, electrification prosthetic device and method the invention discloses a kind of electrification of power cable, the dedicated elbow-type connector mainly by elbow-type insulation shell, the conductive component that is set to the fluid injection joint assembly of elbow-type insulation shell side and is set to elbow-type insulation shell internal cavities constitutes.By dedicated elbow-type connector and repair the compositions such as liquid holding vessel, gas dry filling, air compressor electrification prosthetic device, it can be under the premise of not influencing power cable normal operation, realize the insulation reparation to aging cable, greatly prolong cable life, without the problem that worry power off time is too long, with very high cable remediation efficiency, it is suitable for promoting the use of in the art.
Description
Technical field
The invention belongs to power cable recovery technique field, it is related to the electric power electricity that can be used for after long-play insulation ag(e)ing
Dedicated elbow-type connector is repaired in cable tie electricity recovery technique more particularly to a kind of electrification of power cable and power cable charges reparation side
Method.
Background technique
Crosslinked polyethylene (XLPE) power cable has superior electric property, mechanical performance and heat resistance etc., therefore
It is widely used in Construction of Intercity Network.
The cable manufacturing process of early stage is not high and waterproofness is bad, durings production, transport and operation etc., unavoidably
Ground can generate some local defects in a insulating layer, and the moisture entered in XLPE insulation through various channels can be in the effect of electric field
Under be gathered at microdefect, to cause water tree, under the action of overvoltage, water tree tip is easy to cause electricity tree, further
It may cause the breakdown of cable insulation ontology.With the increase of the cable operation time limit, the problem of aging of China's city cable is increasingly tight
Weight, although the water tree resistant property of cable has biggish promotion in recent years, problem of aging still annoyings power department, and big portion
Point buried underground of premature ageing cable, concentrates on inner city, directly replace aging cable will generate huge project amount and
Huge expense.Therefore, cable local ageing region is repaired using cable recovery technique, thus extend cable service life,
A large amount of manpower and material resources will be saved, very there is realistic meaning.
XLPE cable recovery technique has had more than 30 years history in the world.Early stage people attempt to infuse into cable conductor
Enter drying nitrogen and acetophenone, but repairing effect is unsatisfactory, and the economic benefit is not high；Later, it has been found that siloxanes exists
Cable repairs the unique effect in field, and under the effect of the catalyst, siloxanes can consume cable insulation by hydrolysis-condensation reaction
Moisture in layer, and oligomer filling water tree cavity is generated, to achieve the purpose that extend cable service life.So far, the U.S.
Novinium company has developed two generations reparation liquid based on the Principles of siloxanes, and the first generation is 841 technologies, can effectively be extended
Cable life 10 to 15 years；The second generation is 732/733 technology, it improves siloxanes and catalyst formulation, and joined voltage
Stabilizer, antioxidant etc. inhibit the additive of shelf depreciation, and performance is more superior.
It is reliably injected into cable conductor in order to which liquid will be repaired, dedicated connection adapter is needed to fill end and injection
Set connection.United States Patent (USP) US7658629B2 discloses a kind of cable connection accessory, which is suitable for through copper lug and other
The connected cable of power components, if cable passes through elbow-type connector and switchgear, box-type substation etc. and connect, then this method is just
It is not applicable.United States Patent (USP) US7538274B2 discloses a kind of high voltage connections, and the connector is using preceding needing to remove among cable
Then two cables are fixed in connector, injection process can be completed by flow in pipes by connector, it can bear bigger
Pressure shortens the construction time, but different with previous United States Patent (USP), which, which needs to have a power failure, carries out.United States Patent (USP)
US7331806B2 discloses a kind of cable connector with internal reservoir, which is multi-cavity structure, prolongs
It has grown and has repaired time of the liquid by cable, and can reduce influence of the external environment to liquid process is repaired；But this design
Internal structure it is complicated, high production cost is expensive, and restorative procedure is complicated, and Technique Popularizing is difficult.
Domestic cable recovery technique is still in its infancy.Application No. is the patent application of CN200410072791.5 texts
Part discloses a kind of power cable repairing liquid injection system, and the repair process of the patent needs whole power failure, and without specifically
It is bright how to be reliably connected injection device and end.Application No. is the patent application documents of CN201010028136.5 to disclose
A kind of cross-inked polyethylene power cable electrification prosthetic device and its electrification restorative procedure, adapter are also only applicable on end
The cable of copper lug is installed, if cable is connect by elbow-type connector and switchgear, box-type substation etc., then this method is just not
It is applicable in.
Summary of the invention
The object of the invention is intended in view of the deficiencies of the prior art, provide a kind of dedicated elbow-type of power cable electrification reparation and connect
Head to realize the connection for repairing liquid injection device and cable elbow-shaped connector, and then can be completed to repair in case of constant power
The injection of liquid.
Another object of the present invention is intended to provide a kind of power cable electrification prosthetic device based on above-mentioned dedicated elbow-type connector
And method.
The present invention according on current charging operation equipment (such as switchgear, box-type substation etc.) for connecting power cable
Elbow-type structure, devise a kind of power cable electrification that structure therewith is similar and repair dedicated elbow-type connector comprising elbow-type is exhausted
Edge shell, the fluid injection joint assembly and conductive component for being set to elbow-type insulation shell side；It is inside the elbow-type insulation shell
Hollow structure forms the elbow-type cavity for accommodating conductive component；The conductive component include for charging operation equipment
The conducting rod that cable connecting terminals are electrically connected and the crimp type terminal for being electrically connected with multiple-cable to be repaired, conducting rod and crimp type terminal
It connects and is laid in shell elbow-type cavity, the free connecting pin of conducting rod and crimp type terminal is respectively facing the two of elbow-type cavity and goes out
Mouth direction；The fluid injection joint assembly includes the fluid injection connector and the matched lid used for being set to elbow-type insulation shell side
Cap, the inside design of fluid injection connector have the reservoir channel for extending to crimp type terminal.Dedicated elbow is repaired by the electrification of above-mentioned power cable
Type joint can replace the original elbow-type connector used in charging operation equipment, not in repairing power cable repair process
It influences to realize the insulation reparation to power cable in the case that charging operation equipment works normally.
Dedicated elbow-type connector is repaired in above-mentioned power cable electrification, and the crimp type terminal is tubular conductive part, sidewall design
There are several contacts being recessed inwardly, which is electrically connected with the cable conductor to be repaired formation of insertion crimp type terminal, crimps
Conducting rod mounting hole is offered on the other end side wall opposite with cable core insertion end on terminal.Can make in this way conducting rod with it is to be repaired
Multiple-cable cable core keeps good electrical connection, it is ensured that the normal work of charging operation equipment.
Dedicated elbow-type connector is repaired in above-mentioned power cable electrification, and the conductive component is fixed on elbow-type by interior semi-conductive layer
In insulation shell cavity, interior semi-conductive layer interior wall construction matches with conducting rod and crimp type terminal external form, with crimp type terminal outer wall
The limited step of crimp type terminal is blocked in the interior semi-conductive layer portions end design of adaptation；In preferred implementation, limiting stand
Rank inner surface is along the circumferential direction cone, in order to cable conductor insertion.The elbow-type insulation shell, fluid injection connector and nut cap
Outside is provided with outer semiconducting layer.The material of interior semi-conductive layer and outer semiconducting layer is conductive rubber.Interior semi-conductive layer energy
Enough effectively to control electrical stress, it is continuous that shielding is realized in outer semiconducting layer and cable shield cooperation, and ensures that outer semiconducting layer is in
Ground state.
Dedicated elbow-type connector is repaired in above-mentioned power cable electrification, when not in use, in order to realize the full side to fluid injection connector
Position closing, the nut cap interior design have insulating bar extending from nut cap top inner wall, for being inserted into reservoir channel.Excellent
In the implementation of choosing, the reservoir channel inner wall of the fluid injection connector and corresponding nut cap insulating bar lateral wall are designed as wave
Shape wave relief fabric has both sides to act in this way: (1) increasing inside dedicated elbow-type connector through reservoir channel to outer semiconductive
The creepage distance of layer inhibits creepage phenomenon；(2) so that insulating bar and reservoir channel in nut cap is combined closely, be not easy to fall.
The being firmly combined property of nut cap and fluid injection connector in order to further increase, design has retention bead on the nut cap inner wall, and fluid injection connects
Designing on head outer wall corresponding position has and the matched limiting groove of retention bead.
Dedicated elbow-type connector is repaired in above-mentioned power cable electrification, for the ease of handling, is provided on elbow-type insulation shell
Pull ring.Ground connection eye is additionally provided on elbow-type insulation shell, for connecting with ground line.
The present invention is based on the electrifications of above-mentioned power cable to repair dedicated elbow-type connector, it is further provided a kind of power cable band
Electric prosthetic device, the prosthetic device include that several above-mentioned power cable electrifications repair dedicated elbow-type connector, repair liquid holding vessel, gas
Body drying chamber, air compressor and extraction raffinate collecting tank；Several power cable electrifications are repaired dedicated elbow-type connector and are used for band
Electricity operation equipment cable connection terminal and cable connection to be repaired；The reparation liquid holding vessel, gas dry tank and air compression
Machine passes sequentially through pipeline connection；The liquid holding vessel output port of repairing passes through the elbow-type that pipeline is connect with multiple-cable one end to be repaired
Connector fluid injection fittings, the elbow-type connector fluid injection that the input port of the extraction raffinate collecting tank is connect with the multiple-cable other end to be repaired
Fittings.The quantity of the dedicated elbow-type connector of power cable electrification reparation is twice of power cable to be repaired.
Above-mentioned power cable charges prosthetic device, the pipeline for repairing liquid holding vessel and elbow-type connector fluid injection fittings
It is provided with valve on the pipeline of upper and extraction raffinate collecting tank and elbow-type connector fluid injection fittings, for controlling the inflow for repairing liquid
And uninterrupted.The valve is Liquid valve.
Above-mentioned power cable charges prosthetic device, when air compressor works, the air tank and compressor that are arranged by it
Compressed air indentation gas dry tank is absorbed into moisture in air, has prevented hydrone from entering cable with liquid is repaired, has influenced to repair
Effect；Dry air, which continues to be pressed into, to be repaired liquid holding vessel pressure is passed to reparation liquid, the reparation liquid with pressure being consequently formed
Via in the reservoir channel injection electric-cable core of dedicated elbow-type connector.
Above-mentioned power cable charges prosthetic device, repairs liquid or gas flow size, and operation side for the ease of control
Just and equipment safety, pressure gauge, handle and content gauge are installed, the extraction raffinate, which is collected, to be filled and installs on the reparation liquid holding vessel
There are handle and safety valve, the gas dry fills and is equipped with pressure gauge, handle and safety valve, installs on the air compressor
There are air filling and pressure gauge.Air compressor and reparation liquid holding vessel can adjust the pressure of compressed gas according to its included pressure gauge
Power makes the flow velocity for repairing liquid reach suitable size, keeps low pressure injection to 0.2-0.8MPa.Liquid level can be passed through by repairing liquid holding vessel
It apparently examines and repairs liquid surplus.The safety valve being arranged on extraction raffinate collecting tank, gas dry tank can be in pressure beyond restriction range
When overflowed from safety valve, guarantee safety.Liquid inlet is repaired in addition, being provided on the reparation liquid holding vessel, works as content gauge
When showing lower, reparation liquid can be replenished in time into reparation liquid holding vessel by repairing liquid inlet, to avoid electric power is influenced
Cable repair is normally carried out.It should be strongly noted that repairing liquid can be any one cable insulation aging reparation
Liquid, the prosthetic device can be used for injecting other gases or liquid into power cable.
The present invention is based further on above-mentioned power cable prosthetic device, provides a kind of power cable electrification restorative procedure,
The restorative procedure is followed the steps below using above-mentioned power cable electrification prosthetic device:
(1) preparation before repairing
First have a power failure to charging operation equipment before repairing, the electric parameter of cable is measured after power failure, selects aging
Cable is as multiple-cable to be repaired；Air circulation test is carried out to cable to be repaired, it is ensured that repairing liquid can penetrate through；Specifically include with
Under step by step:
(11) have a power failure and safety prepares, execute power failure process and other preparations in strict accordance with this field relevant institutions
(such as electrical verification, setting fence, suspension Sign Board are carried out before contact arrangement etc.), it is ensured that repairing construction is safe, orderly；
(12) Insulation Test after having a power failure, after power failure, cable is disassembled from charging operation equipment, and to the exhausted of cable
Edge resistance, absorptance, dielectric loss or leakage current measure (according to " DL/T 596-2005 power equipment preventive trial
Regulation ", completed by skilled addressee, it is proposed that more than two projects of measurement), and record test data；
(13) target cable is determined, according to cable aging conditions and Insulation test as a result, selection meets the electricity of aging requirement
Cable carries out insulation reparation as target cable；
(14) on-site assembly debugs repair system, using what is be made of air compressor and the gas dry being attached thereto filling
Gas injection system, the dry air for being passed through setting pressure to target cable (according to the length of cable and the thickness of insulation, choose 0.2-
The injection air pressure of 0.6MPa), guarantee air-tightness at node, it is ensured that repairing liquid can penetrate through；
(2) repairing construction process
The elbow-type connector configured in charging operation equipment is removed, dedicated elbow-type connector is repaired in installation power cable electrification, and
The dedicated elbow-type connector fluid injection connector for being connected cable ends to be repaired by pipeline is received with reparation liquid holding vessel and extraction raffinate respectively
Collect tank to be connected；Restore the power supply to charging operation equipment after being installed, while starting air compressor and carrying out low pressure injection, it will
Liquid holding vessel is repaired in dried air injection, then reparation liquid with pressure is injected into multiple-cable to be repaired through elbow-type connector, until repairing
Multiple liquid note leads to whole cable, and extra reparation liquid is recycled by pipeline by extraction raffinate collecting tank；It is then shut off air compressor, while to
The injection end of cable is passed through a small amount of gas, flows out extra reparation liquid from the other end；Specifically include it is following step by step:
(21) the elbow-type connector connecting in charging operation equipment with target cable is removed, is installed according to conventional elbow-type connector
Step replaces above-mentioned power cable electrification and repairs dedicated elbow-type connector, transports conducting rod and electrification in elbow-type insulation shell cavity
The cable connecting terminals of row equipment abut, and cable conductor to be repaired is abutted with crimp type terminal；
(22) the dedicated elbow-type connector fluid injection connector for being connected cable ends to be repaired by pipeline is stored up with reparation liquid respectively
It deposits tank to be connected with extraction raffinate collecting tank, repairs liquid holding vessel for providing and repair liquid, extraction raffinate receiving flask is another from cable for collecting
Hold the reparation liquid of outflow；It does not leak under biggish air pressure to guarantee to repair liquid, is infused on pipeline and dedicated elbow-type connector
Liquid connector can be linked together by accessories such as insulation filling glue or clips；
(23) restore the power supply to charging operation equipment by regulation after being installed；
(24) it under conditions of guaranteeing air-tightness, adjusts air compressor and gradually promotes air pressure, exported by air compressor
Compressed air continue to be pressed into after gas dry tank is dry and repair liquid holding vessel, make to repair the reparation liquid warp in liquid holding vessel
Dedicated elbow-type connector is injected into cable conductor to be repaired；Entire injection process electrification carries out, injection length by cable length, cut
Situations such as face, circulating resistance, determines；Gas dry tank is used for dry air, removes the moisture in air, prevents the water in air
Divide and enter multiple-cable to be repaired, influences repairing effect；Valve can be used for controlling repair flow quantity and cope with certain special circumstances (such as
Valve is closed rapidly when repairing liquid leakage and interrupts supply)；
(25) it repairs after liquid note leads to whole multiple-cable to be repaired and closes air compressor, liquid holding vessel will be repaired from dedicated elbow-type
It is removed on connector, and gas dry tank is connect by pipeline with dedicated elbow-type connector, the injection end of Xiang Xiufu cable is passed through dry
Dry air flows out the extra reparation liquid in part from the other end, is collected by extraction raffinate collecting tank；Without reparation liquid at end pore
Overflowing (for the ease of observation, can be used transparent hose with the tank connected pipeline of extraction raffinate collection, repairs from transparent hose
Hydrorrhea artificial situation), with prevent cable operate normally after because fever cause repair liquid flowed out from end；
(3) follow-up work is repaired
After cable is repaired, first have a power failure to charging operation equipment, then removes the elbow being mounted in charging operation equipment
Type joint, the electrical cables separate by elbow-type connector and after repairing, and nut cap is installed on the fluid injection connector of elbow-type connector, it prevents from climbing
The electrical hidden danger such as electricity, avoids personal injury；Then restoring scene；Since the dedicated elbow-type connector can be used as conventional elbow-type connector
It uses, therefore can be after cable is repaired, and nut cap is installed on the fluid injection connector of elbow-type connector, prevent from climbing the electricity such as electricity
Gas hidden danger, avoids personal injury；Then restoring scene.
Compared with prior art, the invention has the following beneficial effects:
1, dedicated elbow-type connector is repaired in power cable electrification provided by the invention, is arranged in elbow-type insulation shell by it
Conductive component make power cable normal use, while the fluid injection connector by being set on elbow-type insulation shell, liquid will be repaired
It is injected into aging cable, so as to realize to the exhausted of aging cable under the premise of not influencing power cable normal operation
Edge reparation has filled up the technological gap that the cable electrification with elbow-type connector is repaired.
2, dedicated elbow-type connector is repaired in power cable electrification provided by the invention, not only easy for installation, easy to operate, and can
It is used as conventional elbow-type connector, without removing, cable reparation is carried out using the dedicated elbow-type connector, there is very high cable
Remediation efficiency is suitable for promoting the use of in the art.
3, power cable electrification provided by the invention repairs dedicated elbow-type connector and nut cap is installed to note when not in use
It on liquid connector, can prevent from climbing the electrical hidden danger such as electricity, avoid personal injury, guarantee power cable safe operation.
4, power cable provided by the invention charges restorative procedure, is only possible to the presence of stop of short duration when replacing elbow-type connector
Electric moment (if charging operation equipment itself use be that this problem is then not present in dedicated elbow-type connector), elbow-type connector peace
It can be charged after installing and repair aging cable, greatly shorten power off time, extend cable life.
5, power cable provided by the invention charges restorative procedure, even for there are transition joint, Xiang Laohua cables to adopt
The method reparation that liquid is repaired with low pressure injection is repaired since electrification can be achieved, without the problem that worry power off time is too long.
6, power cable provided by the invention charges restorative procedure, and due to that can use low pressure injection method, there is no need to adopt
With complex devices such as vacuum liquid-absorbing devices, so that prosthetic device is simpler, economic cost is lower.
Detailed description of the invention
Fig. 1 is that dedicated elbow-type joint structure schematic diagram is repaired in power cable of the present invention electrification.
Fig. 2 is that power cable of the present invention charges prosthetic device composition schematic diagram.
In figure, 1 dedicated elbow-type connector, 1-1 elbow-type insulation shell, 1-2 conducting rod, 1-3 crimp type terminal, 1-4 fluid injection connector,
1-4-1 reservoir channel, 1-4-2 limiting groove, 1-5 nut cap, 1-5-1 insulating bar, 1-5-2 retention bead, semi-conductive layer in 1-6,
1-6-1 limited step, 1-7 outer semiconducting layer, 1-8 pull ring, 1-9 are grounded eye, and 2 repair liquid holding vessel, 2-1,3-1,4-2 pressure
Table, 2-2,3-2,5-1 handle, 2-3 content gauge, 3 gas dry tanks, 3-3,5-2 safety valve, 4 air compressors, 4-1 air tank,
5 extraction raffinates, which are collected, to be filled, 6 cables, 7 switchgears, 7-1 casing, and 7-2 extinguishing arc is inserted into stick, 8 valves.
Specific embodiment
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that the present embodiment is served only for
Invention is further explained, but should not be understood as limiting the scope of the invention, the people that is skilled in technique in the field
Member can make the modifications and adaptations of some non-intrinsically safes according to the content of aforementioned present invention to the present invention.
Dedicated elbow-type connector is repaired in the electrification of 1 power cable of embodiment
Present embodiments provide a kind of dedicated elbow-type connector 1 of power cable electrification reparation suitable for switchgear 7.Switchgear
Casing 7-1 is installed on cable connecting terminals, matched extinguishing arc insertion stick 7-2 is provided in casing.
It is as shown in Figure 1 that dedicated elbow-type joint structure is repaired in power cable electrification comprising elbow-type insulation shell 1-1, sets
It is placed in the fluid injection joint assembly and conductive component of elbow-type insulation shell side.It is hollow structure inside elbow-type insulation shell, is formed
For accommodating the elbow-type cavity of conductive component.Conductive component includes conducting rod 1-2 and crimp type terminal 1-3, is crimped in the present embodiment
Terminal 1-3 is copper pipe, and sidewall design has the groove of several inside compression mouldings, as contact, crimp type terminal one end be to
Cable conductor insertion end is repaired, offers conducting rod mounting hole on other end side wall.Conducting rod 1-2 is installed on crimp type terminal installation
In hole, conducting rod 1-2 and crimp type terminal 1-3 are fixed in elbow-type insulation shell cavity by interior semi-conductive layer 1-6, interior semiconductive
The interior semi-conductive layer part end that layer interior wall construction matches with conducting rod and crimp type terminal external form, and be adapted to crimp type terminal outer wall
Portion's design has the limited step 1-6-1 for blocking crimp type terminal；Limited step inner surface is along the circumferential direction cone, so as to
It is inserted into cable conductor.The free connecting pin of conducting rod and crimp type terminal is respectively facing two export directions of elbow-type cavity.It is conductive
The space for being used for containment sheath is formed between bar 1-2 and elbow-type insulation shell inner wall, when dedicated elbow-type connector and switchgear cable
When connection terminal docks, conducting rod 1-2 is electrically connected with extinguishing arc insertion stick 7-2, to realize conducting rod and switchgear cable connection
Terminal electrical connection.The length for being shorter in length than its place elbow-type insulation shell cavity of crimp type terminal 1-3, to form guidance cable
The guide space of insertion, after cable protrudes into elbow-type insulation shell, cable core be inserted into crimp type terminal and on crimp type terminal inner wall
Contact is in close contact.Fluid injection joint assembly includes being set to the fluid injection connector 1-4 of elbow-type insulation shell side and matched
Design has the reservoir channel 1-4-1 for extending to crimp type terminal on the inside of the nut cap 1-5 used, fluid injection connector 1-4.Nut cap interior design
There are insulating bar 1-5-1 extending from nut cap top inner wall, for being inserted into reservoir channel, the reservoir channel inner wall of fluid injection connector
Waveform relief fabric is designed as on the outside of corresponding nut cap insulating bar.Nut cap inner wall and fluid injection connector outer wall corresponding position
On be respectively designed with retention bead 1-5-2 and matched limiting groove 1-4-2.
Outer semiconducting layer 1-7 is provided on the outside of elbow-type insulation shell, fluid injection connector and nut cap.Interior semi-conductive layer and outer half
The material of conductive layer is conductive rubber.Interior semi-conductive layer can effectively control electrical stress, outer semiconducting layer and cable shield
It is continuous that shielding is realized in cooperation, and ensures that outer semiconducting layer is in ground state.
Elbow-type insulation shell angular position is provided with pull ring 1-8, to facilitate the handling of dedicated elbow-type connector.Elbow-type insulation
Ground connection eye 1-9 is provided on shell outer semiconducting layer, for connecting with ground line.
2 power cable of embodiment charges prosthetic device
The present embodiment repairs dedicated elbow-type connector based on the power cable electrification that embodiment 1 provides, and provides a kind of be applicable in
Prosthetic device is charged in the power cable of switchgear 7.It for a threephase cable, is made of three cables, cable ends point
It is not connected to a switchgear, as shown in Figure 2.
It is as shown in Figure 2 that the power cable charges prosthetic device structure comprising the power cable provided in six embodiments
Dedicated elbow-type connector 1 is repaired in electrification, further includes repairing liquid holding vessel 2, gas dry tank 3, air compressor 4 and extraction raffinate collecting tank
5.Power cable electrification repairs dedicated elbow-type connector and replaces the original elbow-type connector of threephase cable, is used for switchgear cable connection
Terminal and cable connection to be repaired.In the elbow-type insulation shell that cable connection is first entered to dedicated elbow-type connector, and make cable conductor
It is inserted into crimp type terminal and is in close contact with the contact on crimp type terminal inner wall, so that conducting rod and cable conductor be made to be formed well
Electrical contact.Then the dedicated elbow-type connector for being connected with cable is installed on switchgear, makes the set of switchgear cable connecting terminals
Pipe is inserted into elbow-type insulation shell side, and so that conducting rod 1-2 is inserted into stick 7-2 with extinguishing arc and abut, to realize conducting rod and switch
The electrical connection of cabinet cable connecting terminals.Repair liquid holding vessel 2, gas dry tank 3 passes sequentially through pipeline with air compressor 4 and is connected to；
It repairs liquid holding vessel output port and passes through the elbow-type connector fluid injection fittings that pipeline is connect with multiple-cable one end to be repaired, extraction raffinate is received
The elbow-type connector fluid injection fittings that the input port of collection tank is connect with the multiple-cable other end to be repaired.
Pressure gauge 2-1, handle 2-2 and content gauge 2-3 are installed, above-mentioned gas is dry to fill 3 on above-mentioned reparation liquid holding vessel 2
On pressure gauge 3-1, handle 3-2 and safety valve 3-3 are installed, be equipped on above-mentioned air compressor 4 air fill 4-1, pressure gauge
4-2 and compressor.Above-mentioned extraction raffinate, which collects to fill, is equipped with handle 5-1 and safety valve 5-2 on 5.In addition, on above-mentioned reparation liquid holding vessel
It is additionally provided with and repairs liquid inlet.It repairs on the pipeline of liquid holding vessel 2 and elbow-type connector fluid injection fittings and extraction raffinate collecting tank 5
It is provided with valve 8 on the pipeline of elbow-type connector fluid injection fittings, for controlling inflow and the uninterrupted of repairing liquid.It should
Valve is Liquid valve.
Application examples
The power cable prosthetic device that the application example is provided using embodiment 2 carries out electrification to the cable for switchgear and repairs
Multiple, steps are as follows:
(1) preparation before repairing
This step include it is following step by step:
(11) have a power failure and safety prepares, execute power failure process and other preparations in strict accordance with this field relevant institutions
(such as electrical verification, setting fence, suspension Sign Board are carried out before contact arrangement etc.), it is ensured that repairing construction is safe, orderly；
(12) Insulation Test after having a power failure, after power failure, threephase cable is disassembled from charging operation equipment, and to three-phase
Insulation resistance, absorptance, dielectric loss or the leakage current of each phase cable of cable measure (according to " DL/T 596-2005
Power equipment preventive trial regulation ", completed by skilled addressee, it is proposed that more than two projects of measurement), and record test number
According to；
(13) determine target cable, according to cable aging conditions and Insulation test as a result, selection meet aging requirement (such as
Dielectric dissipation factor be greater than relevant criterion) cable as target cable, carry out insulation reparation；
(14) on-site assembly debugs repair system, using what is be made of air compressor and the gas dry being attached thereto filling
Gas injection system, the dry air for being passed through setting pressure to target cable (according to the length of cable and the thickness of insulation, choose 0.2-
The injection air pressure of 0.6MPa), guarantee air-tightness at node, it is ensured that repairing liquid can penetrate through；
(2) repairing construction process
This step include it is following step by step:
(21) the elbow-type connector connecting on switchgear 7 with target cable 6 is removed, according to conventional elbow-type connector installation steps
It replaces above-mentioned power cable electrification and repairs dedicated elbow-type connector, set the conducting rod in elbow-type insulation shell cavity with charging operation
Standby cable connecting terminals abut, and cable conductor to be repaired is abutted with crimp type terminal；
(22) the dedicated elbow-type connector fluid injection connector for being connected cable ends to be repaired by pipeline is stored up with reparation liquid respectively
It deposits tank to be connected with extraction raffinate collecting tank, and can by the fluid injection connector of pipeline and dedicated elbow-type connector using the filling accessories such as glue and clip
By connection, do not leaked under biggish air pressure with guaranteeing to repair liquid；
(23) restore the power supply to switchgear by regulation after being installed；
(24) it under conditions of guaranteeing air-tightness, adjusts air compressor 4 and gradually promotes air pressure, exported by air compressor
Compressed air continue to be pressed into after gas dry tank 2 is dry and repair liquid holding vessel 1, control valve makes to repair liquid holding vessel
In reparation liquid be injected into cable conductor to be repaired through dedicated elbow-type connector 1, and according to air compressor and repair liquid storage
Pressure tank performance is real, adjusts the pressure of compressed gas to 0.2-0.8MPa, so that the flow velocity for repairing liquid is reached suitable size, keep repairing
Multiple liquid low pressure injection；Entire injection process electrification carries out, and injection length is determined by situations such as cable length, section, circulating resistance；
(25) it repairs after liquid note leads to whole multiple-cable to be repaired and closes air compressor, liquid holding vessel will be repaired from dedicated elbow-type
It is removed on connector, and gas dry tank is connect by pipeline with dedicated elbow-type connector, the injection end of Xiang Xiufu cable is passed through dry
Pathogenic dryness body flows out the extra reparation liquid in part from the other end, is collected by extraction raffinate collecting tank；Without reparation liquid at end pore
It overflows and (repairs hydrorrhea artificial situation by collecting observation in tank connected transparent hose with extraction raffinate), after preventing cable from operating normally
Because fever causes reparation liquid to flow out from end；
Repeat the above steps (21)-(25), successively carries out insulation reparation to all target cables.
(3) follow-up work is repaired
It uses since the dedicated elbow-type connector can be used as conventional elbow-type connector, after cable is repaired, will cover
Cap 1-5 is installed on the fluid injection connector 1-4 of elbow-type connector, is prevented from climbing the electrical hidden danger such as electricity, is avoided personal injury；Then restore existing
?.
Claims (10)
1. dedicated elbow-type connector (1) is repaired in a kind of power cable electrification, it is characterised in that including elbow-type insulation shell (1-1), set
It is placed in the fluid injection joint assembly and conductive component of elbow-type insulation shell side；It is hollow structure inside the elbow-type insulation shell,
Form the elbow-type cavity for accommodating conductive component；The conductive component includes for the cable connection end with charging operation equipment
The conducting rod (1-2) that son is electrically connected and the crimp type terminal (1-3) for being electrically connected with multiple-cable to be repaired, conducting rod and crimp type terminal
It connects and is laid in shell elbow-type cavity, the free connecting pin of conducting rod and crimp type terminal is respectively facing the two of elbow-type cavity and goes out
Mouth direction；The fluid injection joint assembly includes being set to the fluid injection connector (1-4) of elbow-type insulation shell side and matched making
Nut cap (1-5), the design of fluid injection connector (1-4) inside have the reservoir channel (1-4-1) for extending to crimp type terminal.
2. dedicated elbow-type connector is repaired in power cable electrification according to claim 1, it is characterised in that the crimp type terminal is
Tubular conductive part, sidewall design have several contacts being recessed inwardly, the telegram in reply to be repaired of the contact and insertion crimp type terminal
Cable cable core, which is formed, to be electrically connected, and offers conducting rod mounting hole on the other end side wall opposite with cable core insertion end on crimp type terminal.
3. dedicated elbow-type connector is repaired in power cable electrification according to claim 1, it is characterised in that the conductive component is logical
Interior semi-conductive layer (1-6) is crossed to be fixed in elbow-type insulation shell cavity.
4. dedicated elbow-type connector is repaired in power cable electrification according to claim 1, it is characterised in that the elbow-type insulation shell
Outer semiconducting layer (1-7) is provided on the outside of body, fluid injection connector and nut cap.
5. dedicated elbow-type connector is repaired in power cable electrification according to claim 1, it is characterised in that set inside the nut cap
In respect of insulating bar (1-5-1) extend from nut cap top inner wall, for being inserted into reservoir channel.
6. dedicated elbow-type connector is repaired in power cable electrification according to claim 5, it is characterised in that the fluid injection connector
Reservoir channel inner wall and corresponding nut cap insulating bar lateral wall are designed as waveform relief fabric.
7. repairing dedicated elbow-type connector to the electrification of power cable described in 6 any claims according to claim 1, it is characterised in that
There is retention bead (1-5-2) design on the nut cap inner wall, designing on fluid injection connector outer wall corresponding position has and retention bead
The limiting groove (1-4-2) matched.
8. a kind of power cable charges prosthetic device, it is characterised in that including described in several claim 1 to 7 any claims
Power cable electrification repair dedicated elbow-type connector (1), repair liquid holding vessel (2), gas dry tank (3), air compressor (4)
With extraction raffinate collecting tank (5)；Several power cable electrifications repair dedicated elbow-type connector for connecting charging operation equipment cable
Connecting terminal and cable connection to be repaired；The reparation liquid holding vessel (2), gas dry tank (3) and air compressor (4) successively lead to
Piping connection；The liquid holding vessel output port of repairing passes through the elbow-type connector fluid injection that pipeline is connect with multiple-cable one end to be repaired
Fittings, the elbow-type connector fluid injection connector that the input port of the extraction raffinate collecting tank is connect with the multiple-cable other end to be repaired connect
It is logical.
9. power cable charges prosthetic device according to claim 8, it is characterised in that the reparation liquid holding vessel and elbow-type
Valve is provided on the pipeline of connector fluid injection fittings and on extraction raffinate collecting tank and the pipeline of elbow-type connector fluid injection fittings
Door.
10. a kind of power cable charges restorative procedure, it is characterised in that described to utilize the power cable band of claim 8 or 9
Electric prosthetic device follows the steps below:
(1) preparation before repairing
First have a power failure to charging operation equipment before repairing, the electric parameter of cable is measured after power failure, selects the cable of aging
As multiple-cable to be repaired (6)；Air circulation test is carried out to cable to be repaired (6), it is ensured that repairing liquid can penetrate through；
(2) repairing construction process
The elbow-type connector configured in charging operation equipment is removed, dedicated elbow-type connector (1) is repaired in installation power cable electrification, and is led to
The dedicated elbow-type connector fluid injection connector that piping connects cable ends to be repaired is collected with reparation liquid holding vessel and extraction raffinate respectively
Tank is connected；Restore power supply to charging operation equipment after being installed, while starting air compressor and carrying out low pressure injection, it will be through
Liquid holding vessel is repaired in dry air injection, then reparation liquid with pressure is injected into multiple-cable to be repaired through elbow-type connector, until repairing
Liquid note leads to whole cable, and extra reparation liquid is recycled by pipeline by extraction raffinate collecting tank；It is then shut off air compressor, while to electricity
The injection end of cable is passed through gas, flows out extra reparation liquid from the other end, is collected by extraction raffinate collecting tank；
(3) follow-up work is repaired
After cable is repaired, first have a power failure to charging operation equipment, then removes the elbow-type being mounted in charging operation equipment and connect
Head, the electrical cables separate by elbow-type connector and after repairing, and nut cap is installed on the fluid injection connector of elbow-type connector (1), it is then extensive
Reappear field；
Or after cable is repaired, nut cap is installed on the fluid injection connector of elbow-type connector (1), then restoring scene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910215189.9A CN109768509B (en) | 2019-03-21 | 2019-03-21 | Elbow type joint special for electrified repair of power cable, repair device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910215189.9A CN109768509B (en) | 2019-03-21 | 2019-03-21 | Elbow type joint special for electrified repair of power cable, repair device and method |
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| CN109768509A true CN109768509A (en) | 2019-05-17 |
| CN109768509B CN109768509B (en) | 2024-03-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112018654A (en) * | 2020-09-01 | 2020-12-01 | 广东电网有限责任公司江门供电局 | Elbow type cable head pulling-out device |
| CN112202012A (en) * | 2020-09-22 | 2021-01-08 | 华南理工大学 | Connector and repair device for bad electrical contact inside high-voltage cable |
| CN112234494A (en) * | 2020-10-10 | 2021-01-15 | 广东海洋大学 | Ship cable gas-liquid composite stage type water tree restoration method |
| CN113471889A (en) * | 2021-05-28 | 2021-10-01 | 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 |
| CN113555838A (en) * | 2021-07-14 | 2021-10-26 | 国网北京市电力公司 | Overvoltage preventing device for elbow-shaped head of cable terminal |
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| CN112234494A (en) * | 2020-10-10 | 2021-01-15 | 广东海洋大学 | Ship cable gas-liquid composite stage type water tree restoration method |
| CN112234494B (en) * | 2020-10-10 | 2021-09-21 | 广东海洋大学 | Ship cable gas-liquid composite stage type water tree restoration method |
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| CN113555838A (en) * | 2021-07-14 | 2021-10-26 | 国网北京市电力公司 | Overvoltage preventing device for elbow-shaped head of cable terminal |
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|---|---|
| CN109768509B (en) | 2024-03-22 |
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