CN115241800A - 10kV live working bypass flexible cable suspension device and installation method thereof - Google Patents
10kV live working bypass flexible cable suspension device and installation method thereof Download PDFInfo
- Publication number
- CN115241800A CN115241800A CN202210867824.3A CN202210867824A CN115241800A CN 115241800 A CN115241800 A CN 115241800A CN 202210867824 A CN202210867824 A CN 202210867824A CN 115241800 A CN115241800 A CN 115241800A
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- insulating
- insulation
- bypass
- flexible cable
- sleeve
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- 239000000725 suspension Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 title abstract description 10
- 238000009413 insulation Methods 0.000 claims abstract description 62
- 239000012212 insulator Substances 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 239000004020 conductor Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- 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
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
-
- 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
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- 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
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
-
- 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
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/196—Cable junctions protected by sleeves, e.g. for communication cable having lapped insulation
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention discloses a 10kV live working bypass flexible cable suspension device and an installation method thereof. It can be seen that it establishes on naked bare wire through insulating sleeve, plays insulating effect 20kV above insulation level, prevents that the insulator spindle from forming the electric current return circuit because of humidity is big, dirty insulating properties descends, plays supplementary insulating effect, is the insulator spindle of stereoplasm with short jack replacement simultaneously, avoids leading to the burn or the burn of self or bypass cable because humidity and dirty reduce its insulating properties.
Description
Technical Field
The invention relates to the technical field of power maintenance, in particular to a 10kV live working bypass flexible cable suspension device and an installation method thereof.
Background
The distribution network bypass operation method requires that a set of temporary bypass power supply system is constructed in a short time, so that the planned maintenance work, the fault first-aid repair work and the equipment replacement work of an overhead distribution line and an underground power cable line are completed in an uninterrupted power supply state, the power failure range is reduced to the maximum extent, and the influence of power failure on users is reduced.
In order to work conveniently during bypass operation, a bypass load switch is usually placed on the ground, 6 bypass flexible cables are hung on a 10kV overhead line through short jacks and are overlapped step by step to form a temporary bypass system, a down lead of the flexible cable is connected with the 10kV overhead line through an insulating drainage wire clamp and is wrapped by an insulating blanket, and the short jacks have the functions of bearing and insulation.
However, in the actual use process, after the operation is finished, the flexible cable and the short jack are detached, the three-phase insulation short jack is found to be burnt, and the outer sheath of the flexible cable is burnt in different degrees.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the 10kV live working bypass flexible cable suspension device and the installation method thereof are provided, and the three-phase insulated short jack and the flexible cable outer sheath are prevented from being burnt or burnt during bypass operation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a 10kV live working bypass flexible cable hanging device, includes insulation support, insulator spindle and insulating fixing-line device, insulator spindle one end and insulation support detachably fixed connection, the other end and insulating fixing-line device fixed connection.
The other technical scheme adopted by the invention is as follows:
a method for installing a 10kV live working bypass flexible cable suspension device comprises the following steps:
s1, operating an insulating bucket arm vehicle to sleeve an insulating sleeve on a live wire;
s2, fixedly connecting the shackle of the insulating rod with the lifting lug of the insulating sleeve;
s3, suspending the bypass flexible cables to an operation position, enabling the insulation wire clamps to clamp the three-phase bypass flexible cables respectively, enabling the bypass flexible cables to droop naturally, and after the three-phase cable bypasses are all suspended flexibly, overlapping the bypass flexible cables to a live line phase by phase to complete construction of a bypass system.
The invention has the beneficial effects that: a10 kV live working bypass flexible cable suspension device and an installation method thereof are provided, wherein an insulation sleeve is sleeved on a bare conductor to play an insulation level of more than 20kV, so that an insulation rod is prevented from forming a current loop due to high humidity and reduction of dirty insulation performance, an auxiliary insulation effect is played, a short jack is replaced by a hard insulation rod, and the phenomenon that the insulation rod is burnt or burnt due to reduction of the insulation performance of the short jack due to humidity and dirty is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a 10kV live working bypass flexible cable suspension device according to the present invention;
fig. 2 is a current flow diagram according to the present invention.
Description of reference numerals:
1. an insulating sleeve; 2. an insulating rod; 3. lifting lugs; 4. an insulating wire clamping device; 5. a bypass cable; 6. and (4) bare wires.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, the suspension device for the 10kV live working bypass flexible cable comprises an insulating sleeve, an insulating rod and an insulating wire clamping device, wherein one end of the insulating rod is detachably and fixedly connected with the insulating sleeve, and the other end of the insulating rod is fixedly connected with the insulating wire clamping device.
As can be seen from the above description, the beneficial effects of the present invention are: the utility model provides a 10kV live working bypass flexible cable hanging device establishes on naked bare conductor through insulating sleeve pipe cover, plays insulating effect 20kV above insulation level, prevents that the insulator spindle from forming current loop because of humidity is big, dirty insulating properties descends, plays supplementary insulating effect, will be short very heavy replacement simultaneously and be the insulator spindle of stereoplasm, avoids because humidity and dirty reduce its insulating properties, leads to the burn or the burnout of self or bypass cable.
Further, the insulating sleeve is provided with an inner lining made of anti-skid rubber.
As can be seen from the above description, the insulating sleeves are prevented from sliding left and right on the bare wires.
Furthermore, a lifting lug is arranged on one surface of the insulating sleeve facing the insulating rod, a shackle is arranged at one end of the insulating rod facing the insulating sleeve, and the insulating rod is connected with the shackle through the lifting lug and the shackle to be fixedly connected with the insulating sleeve in a detachable mode.
As is clear from the above description, a detachably fixed connection to the bushing is achieved.
Further, the insulating fixing-line device is provided with an inner liner made of anti-skidding rubber materials.
As can be seen from the above description, the connection strength of the insulation chuck and the bypass cable is reinforced.
Further, the effective length of the insulating sleeve is at least 20cm.
As can be seen from the above description, the stress of the overhead conductor is shared uniformly, and the phenomenon that the bypass flexible cable is broken due to the stress of about 30kg is concentrated on one point of the conductor is avoided.
Furthermore, the insulating sleeve, the insulating rod and the insulating wire clamping device are made of epoxy resin glass fiber reinforced plastics.
As can be seen from the above description, the insulation grade of 20kV or more is achieved, and the insulation performance is prevented from being reduced due to the high humidity and dirt.
A method for installing a 10kV live working bypass flexible cable suspension device comprises the following steps:
s1, operating an insulating bucket arm vehicle to sleeve an insulating sleeve on a live wire;
s2, fixedly connecting the shackle of the insulating rod with the lifting lug of the insulating sleeve;
s3, suspending the bypass flexible cables to an operation position, enabling the insulation wire clamps to clamp the three-phase bypass flexible cables respectively, enabling the bypass flexible cables to droop naturally, and after the three-phase cable bypasses are all suspended flexibly, lapping the bypass flexible cables to a live line one by one to complete construction of a bypass system.
As can be seen from the above description, cable suspension device installation is achieved.
Further, the method also comprises the following steps:
s0, using the insulating megger to carry out the point survey of no less than three points to the insulator spindle, ensure that the insulation resistance of insulator spindle is greater than 700M omega, clean insulating sleeve, insulating fixing-line device in order to ensure that insulating sleeve and insulating fixing-line device do not have dirty, no drop of water, do not have the damage.
As can be seen from the above description, the cable suspension device insulation performance is ensured.
Further, the distance from the high-voltage drainage wire clamp of the bypass cable to the insulating wire clamp is larger than or equal to 1.2m.
As can be seen from the above description, the overlap length is reserved.
The invention is used for ensuring that the bypass cable is not burnt due to current when the bypass cable is used for bypass operation.
Referring to fig. 1, a first embodiment of the present invention is:
aiming at the problems that three-phase insulation short jacks are burnt during operation and the flexible cable outer sheath is burnt in different degrees, factors such as environmental weather, flexible cable structure, field operation conditions and the like during operation are analyzed and demonstrated, a discharging loop is searched, and the reasons of short jack burning and flexible cable burning are found out.
The operation process is divided into three stages, wherein the first stage comprises the steps of laying a bypass system and lapping a flexible cable, and the bypass system is put into use; in the second stage, the equipment to be overhauled is replaced by a construction team; and the bypass system in the third stage exits the operation, and the bypass flexible cable is dismantled and recovered.
During analysis, the second stage shows that when the bypass system operates, rain falls and air humidity is high, so that the short insulating jack is likely to be affected with damp, the insulating property is reduced, and leakage current is increased.
Meanwhile, the bypass cable is analyzed and found that the bypass flexible cable comprises an outer sheath, a shielding layer, an outer semi-conducting layer, an insulator, an inner semi-conducting layer and a conductor from outside to inside, wherein the burnt part is an outer sheath which does not have insulation performance; the shielding layer has the functions of shielding electromagnetic fields and protecting grounding (the inner part of a cable core is damaged, and leaked current can flow into a grounding grid along the shielding layer to play a role of safety protection).
As the circuit is a bare conductor GJL-240, the metal shell part of the bypass load switch is grounded, and the flexible cable quick-pulling plug is connected to the bypass load switch.
In conclusion, analysis shows that the insulation performance of the short insulation jack is reduced due to rainy days, the overhead line is a bare conductor, the flexible cable sheath is broken down, and the shielding layer and the metal shell of the bypass load switch are grounded to form a current loop as shown in fig. 2.
Based on this, it is considered that under the condition of air humidity or insulation short jack dirt, the insulation performance of the cable cannot be ensured, the shielding layer of the bypass flexible cable is grounded to form a current loop, the insulation short jack and a bypass system (a cable and a bypass switch) are burnt out if the current loop is light, and a circuit ground loss fault is caused if the current loop is heavy.
Therefore, the invention designs a 10kV live working bypass flexible cable suspension device which comprises an insulating sleeve 1, an insulating rod 2 and a bypass cable clamping device.
The insulation sleeve 1 is sleeved on an exposed bare conductor 6, the lower end of the insulation sleeve 1 is provided with a lifting lug 3, in the embodiment, the effective length of the insulation sleeve 1 is about 20cm, the insulation sleeve is made of epoxy resin glass fiber reinforced plastic (hard) and is lined with an insulating anti-skid rubber material, the insulation level of the insulation sleeve is more than 20kV, a current loop is prevented from being formed due to high humidity and reduced dirty insulation performance of the insulation rod 2, and an auxiliary insulation effect is achieved; the stress of the overhead conductor is uniformly distributed, the phenomenon that the bypass flexible cable is broken when the stress of about 30kg weight is concentrated on one point of the conductor is avoided, and the insulating anti-skidding rubber material can prevent the left and right insulating sleeves 1 from moving left and right.
2 one end of insulator spindle has the shackle, through shackle and 3 cooperation of lug with 1 fixed connection of insulation support, the other end has bypass cable fixing-line device and 5 detachable fixed connection of bypass cable to play the effect of fixed bypass cable, in this embodiment, insulator spindle 2 has adopted the material of insulating grade more than 20kV, for example epoxy glass steel material, effective insulating length 0.4 meter, and have certain mechanical strength, its insulating properties is very big promotion than insulating short very heavy, can regard as the main insulation to use.
In this embodiment, 5 fixing-line devices of bypass cable adopt line card line ware principle, and current strain clamp can be referred to its concrete structure, because it is prior art, no longer gives unnecessary details in this department, and its material is epoxy glass steel material (stereoplasm), possesses certain mechanical strength, is convenient for install fast and firm, and the insulating anti-skidding rubber material of inside lining is in order further to strengthen insulating effect.
In addition, in this embodiment, the lifting lug 3 and the insulation sleeve 1 are detachably and fixedly connected, so that the component replacement is convenient, and the subsequent maintenance is convenient.
When the suspension device is used, before installation, at least three points of main insulation (an insulation short rod) of the suspension device need to be measured by using a 2500V gear or a 5000V gear of an insulation megger, and the insulation resistance is more than 700M omega, so that the suspension device can be used qualified; the insulating sleeve 1 and the insulating wire clamping device 4 of the device are wiped to ensure no dirt, no water drop, no damage and the like.
Then the following steps are adopted for installation:
s1, operating the insulating bucket arm vehicle to reach a line operation station, and sleeving an insulating sleeve on a live wire.
Because the sleeve is internally provided with anti-skidding measures, the sleeve is prevented from sliding left and right.
And S2, fixedly connecting the short insulating rod with the lifting lug of the insulating sleeve through a shackle.
In this embodiment, the shackle has a self-locking function.
S3, hoisting the bypass flexible cable to an operation position by using an insulating rope, clamping the bypass flexible cable by using an insulating wire clamping device to enable the bypass flexible cable to naturally droop, and after the three-phase cable is suspended completely, lapping the bypass flexible cable to a live line phase by phase to complete construction of a bypass system.
In this embodiment, the high voltage drainage fastener of bypass cable flagging 1.2 meters, fastener to insulating fixing-line device distance 1.2m promptly, reserve overlap joint length.
In summary, according to the 10kV live working bypass flexible cable suspension device and the installation method thereof provided by the invention, the insulation sleeve is sleeved on the bare conductor to play an insulation level of more than 20kV, so that the insulation rod is prevented from forming a current loop due to high humidity and reduced dirty insulation performance, and an auxiliary insulation effect is played.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the accompanying drawings, which are directly or indirectly applied to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a 10kV live working bypass flexible cable hanging device which characterized in that, includes insulation support, insulator spindle and insulating fixing-line device, insulator spindle one end and insulation support detachably fixed connection, the other end and insulating fixing-line device fixed connection.
2. The 10kV live working bypass flexible cable suspension device according to claim 1, wherein the insulation sleeve is provided with an inner liner made of anti-slip rubber.
3. The suspension device for the 10kV live working bypass flexible cable according to claim 1, wherein a lifting lug is arranged on one side of the insulation sleeve facing the insulation rod, a shackle is arranged on one end of the insulation rod facing the insulation sleeve, and the insulation rod is detachably and fixedly connected with the insulation sleeve through connection between the lifting lug and the shackle.
4. The 10kV live working bypass flexible cable suspension device as claimed in claim 1, wherein the insulation line clamping device is provided with an inner lining made of anti-skid rubber.
5. The 10kV live working bypass flexible cable suspension device according to claim 1, wherein the effective length of the insulation sleeve is at least 20cm.
6. The 10kV live working bypass flexible cable suspension device according to claim 1, wherein the insulating sleeve, the insulating rod and the insulating wire clamping device are made of epoxy glass reinforced plastic.
7. A method for installing a 10kV live working bypass flexible cable suspension device is characterized by comprising the following steps:
s1, operating an insulating bucket arm vehicle to sleeve an insulating sleeve on a live wire;
s2, fixedly connecting the shackle of the insulating rod with the lifting lug of the insulating sleeve;
s3, suspending the bypass flexible cables to an operation position, enabling the insulation wire clamps to clamp the three-phase bypass flexible cables respectively, enabling the bypass flexible cables to droop naturally, and after the three-phase cable bypasses are all suspended flexibly, overlapping the bypass flexible cables to a live line phase by phase to complete construction of a bypass system.
8. The method for installing the 10kV live working bypass flexible cable suspension device according to claim 7, further comprising the following steps:
s0, using the insulating megger to carry out point measurement of no less than three points on the insulating rod, ensuring that the insulation resistance of the insulating rod is greater than 700M omega, and wiping the insulating sleeve and the insulating wire clamping device to ensure that the insulating sleeve and the insulating wire clamping device are free of dirt, water drops and damage.
9. The method for installing the 10kV live working bypass flexible cable suspension device according to claim 7, wherein the distance from the high-voltage lead clamp of the bypass cable to the insulated wire clamping device is greater than or equal to 1.2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210867824.3A CN115241800B (en) | 2022-07-22 | 2022-07-22 | 10KV live working bypass flexible cable suspension device and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210867824.3A CN115241800B (en) | 2022-07-22 | 2022-07-22 | 10KV live working bypass flexible cable suspension device and installation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115241800A true CN115241800A (en) | 2022-10-25 |
| CN115241800B CN115241800B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210867824.3A Active CN115241800B (en) | 2022-07-22 | 2022-07-22 | 10KV live working bypass flexible cable suspension device and installation method thereof |
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| CN (1) | CN115241800B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122525A (en) * | 1994-08-01 | 1996-05-15 | 塔斯曼电缆公司 | Cable protection device |
| CN105337212A (en) * | 2015-11-21 | 2016-02-17 | 国网山东蓬莱市供电公司 | Method for strengthening insulation of 10kV overhead line and improving operation reliability |
| CN108155501A (en) * | 2018-02-13 | 2018-06-12 | 国网上海市电力公司 | 10KV outlet cables and overhead transmission line lap works rod-type arc-extinction device |
| KR20190043082A (en) * | 2017-10-17 | 2019-04-25 | 제룡산업 주식회사 | A temporary gripping device for indirect hot-line work |
| KR102229258B1 (en) * | 2019-10-02 | 2021-03-18 | 한국전력공사 | Sheath ground device for cable |
| CN215772467U (en) * | 2021-09-14 | 2022-02-08 | 国网四川省电力公司成都供电公司 | Auxiliary support insulating fixture for bypass flexible cable lap joint overhead line |
| CN114156783A (en) * | 2021-11-04 | 2022-03-08 | 国网浙江省电力有限公司淳安县供电公司 | Connecting device for indirect electrified bypass cable and electrified lead of insulating rod |
| CN216530465U (en) * | 2021-12-27 | 2022-05-13 | 浙江图盛输变电工程有限公司 | Bypass insulation drainage wire fixing device |
-
2022
- 2022-07-22 CN CN202210867824.3A patent/CN115241800B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122525A (en) * | 1994-08-01 | 1996-05-15 | 塔斯曼电缆公司 | Cable protection device |
| CN105337212A (en) * | 2015-11-21 | 2016-02-17 | 国网山东蓬莱市供电公司 | Method for strengthening insulation of 10kV overhead line and improving operation reliability |
| KR20190043082A (en) * | 2017-10-17 | 2019-04-25 | 제룡산업 주식회사 | A temporary gripping device for indirect hot-line work |
| CN108155501A (en) * | 2018-02-13 | 2018-06-12 | 国网上海市电力公司 | 10KV outlet cables and overhead transmission line lap works rod-type arc-extinction device |
| KR102229258B1 (en) * | 2019-10-02 | 2021-03-18 | 한국전력공사 | Sheath ground device for cable |
| CN215772467U (en) * | 2021-09-14 | 2022-02-08 | 国网四川省电力公司成都供电公司 | Auxiliary support insulating fixture for bypass flexible cable lap joint overhead line |
| CN114156783A (en) * | 2021-11-04 | 2022-03-08 | 国网浙江省电力有限公司淳安县供电公司 | Connecting device for indirect electrified bypass cable and electrified lead of insulating rod |
| CN216530465U (en) * | 2021-12-27 | 2022-05-13 | 浙江图盛输变电工程有限公司 | Bypass insulation drainage wire fixing device |
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| Publication number | Publication date |
|---|---|
| CN115241800B (en) | 2024-04-30 |
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