CN115241800B - 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
- CN115241800B CN115241800B CN202210867824.3A CN202210867824A CN115241800B CN 115241800 B CN115241800 B CN 115241800B CN 202210867824 A CN202210867824 A CN 202210867824A CN 115241800 B CN115241800 B CN 115241800B
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- CN
- China
- Prior art keywords
- insulating
- flexible cable
- bypass
- sleeve
- suspension device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000725 suspension Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 title claims abstract description 14
- 239000012212 insulator Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 12
- 238000009413 insulation Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011152 fibreglass 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
- 239000010959 steel Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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 the insulating sleeve is sleeved on the exposed bare conductor, so that an insulating effect of over 20kV is achieved, the insulating rod is prevented from forming a current loop due to high humidity and reduced dirty insulating property, an auxiliary insulating effect is achieved, meanwhile, the short jack is replaced to form a hard insulating rod, and the insulating property of the insulating rod is prevented from being reduced due to humidity and dirt, so that burning or burning of the insulating rod or bypass cable is avoided.
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 temporary bypass power supply system is constructed in a short time, so that the scheduled maintenance work, the fault rush-repair work and the equipment replacement work of the overhead distribution line and the underground power cable line are completed in an uninterrupted power supply state, the power outage range is reduced to the greatest extent, and the influence of the power outage on users is reduced.
For the convenience of work during bypass operation, often place bypass load switch on ground, 6 bypass flexible cable hang on 10kV overhead line through the short jack, carry out step by step overlap joint again, construct interim bypass system, flexible cable downlead is connected with 10kV overhead line through insulating drainage fastener to wrap up with insulating blanket, the short jack has bearing, insulating effect.
However, in the actual use process, after the operation is completed, the flexible cable and the short jack are disassembled, and the three-phase insulation short jack is found to burn out, so that the outer sheath of the flexible cable has different degrees of burn.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the 10kV live working bypass flexible cable suspension device and the installation method thereof are provided, and the phenomenon that a three-phase insulation short jack and a flexible cable outer sheath are burnt or burnt during bypass working is avoided.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a 10kV live working bypass flexible cable suspension device, includes insulation support, insulator spindle and insulation card line ware, insulator spindle one end and insulation support detachably fixed connection, the other end and insulation card line ware fixed connection.
The invention adopts another technical scheme that:
a10 kV live working bypass flexible cable suspension device installation method comprises the following steps:
s1, operating an insulating arm trolley to sleeve an insulating sleeve on a live wire;
S2, fixedly connecting a shackle of an insulating rod with a lifting lug of an insulating sleeve;
S3, suspending the bypass flexible cable to an operation position, enabling the insulating wire clamping device to clamp the three-phase bypass flexible cable respectively, enabling the bypass flexible cable to naturally droop, and after the three-phase cable bypass flexible cable is suspended, overlapping the bypass flexible cable to an electrified line phase by phase, so as to complete the 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 characterized in that an insulating sleeve is sleeved on a bare conductor, so that an insulating effect is achieved by over 20kV, a current loop is prevented from being formed by an insulating rod due to high humidity and reduced dirt insulating property, an auxiliary insulating effect is achieved, meanwhile, a short jack is replaced by a hard insulating rod, and the insulating property of the insulating rod is prevented from being reduced due to humidity and dirt, so that the burning or burning of a bypass cable is avoided.
Drawings
FIG. 1 is a schematic structural view of a 10kV live working bypass flexible cable suspension device according to the invention;
Fig. 2 is a current flow chart according to the present invention.
Description of the reference numerals:
1. an insulating sleeve; 2. an insulating rod; 3. lifting lugs; 4. an insulating wire clamping device; 5. a bypass cable; 6. bare wire.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1, a 10kV live working bypass flexible cable suspension device 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.
From the above description, the beneficial effects of the invention are as follows: a10 kV live working bypass flexible cable suspension device is sleeved on a bare conductor through an insulating sleeve, plays an insulating role of over 20kV, prevents an insulating rod from forming a current loop due to high humidity and reduced dirty insulating property, plays an auxiliary insulating role, and meanwhile replaces a short jack with a hard insulating rod to avoid burning or burning of the bypass cable due to the fact that the insulating property of the insulating rod is reduced due to humidity and dirt.
Further, the insulating sleeve is provided with an inner lining made of anti-slip rubber.
From the above description, the insulating sleeve is prevented from sliding left and right on the bare conductor.
Further, one face of the insulating sleeve facing the insulating rod is provided with a lifting lug, one end of the insulating rod facing the insulating sleeve is provided with a shackle, and the insulating rod is detachably and fixedly connected with the insulating sleeve through connection between the lifting lug and the shackle.
As is evident from the above description, a detachable fixed connection with the insulating sleeve is achieved.
Further, the insulating wire clamping device is provided with an inner lining made of anti-slip rubber.
From the above description, it is known to reinforce the connection strength of the insulated wire holder and the bypass cable.
Further, the effective length of the insulating sleeve is at least 20cm.
From the above description, the stress of the overhead conductor is uniformly distributed, so that the situation that the bypass flexible cable is broken due to the fact that about 30kg of weight is concentrated at one point of the conductor is avoided.
Further, the insulating sleeve, the insulating rod and the insulating wire clamping device are made of epoxy resin glass fiber reinforced plastic.
From the above description, it is understood that the insulating effect of 20kV or more is achieved and the deterioration of the insulating performance due to the large humidity and dirt is prevented.
A10 kV live working bypass flexible cable suspension device installation method comprises the following steps:
s1, operating an insulating arm trolley to sleeve an insulating sleeve on a live wire;
S2, fixedly connecting a shackle of an insulating rod with a lifting lug of an insulating sleeve;
S3, suspending the bypass flexible cable to an operation position, enabling the insulating wire clamping device to clamp the three-phase bypass flexible cable respectively, enabling the bypass flexible cable to naturally droop, and after the three-phase cable bypass flexible cable is suspended, overlapping the bypass flexible cable to an electrified line phase by phase, so as to complete the construction of a bypass system.
As is apparent from the above description, the cable suspension device installation is realized.
Further, the method further comprises the steps of:
S0, performing point measurement on the insulating rod at least at three points by using an insulating rocking meter, ensuring that the insulating resistance of the insulating rod is more than 700MΩ, and wiping the insulating sleeve and the insulating wire clamp to ensure that the insulating sleeve and the insulating wire clamp are free from dirt, water drops and damage.
As is apparent from the above description, the insulation performance of the cable suspension device is ensured.
Further, the distance from the high-voltage drainage wire clamp of the bypass cable to the insulating wire clamp is greater than or equal to 1.2m.
As is apparent from the above description, the overlap length is reserved.
When the invention is used for bypass operation, the bypass cable is ensured not to be burnt due to the burning of the current.
Referring to fig. 1, a first embodiment of the present invention is as follows:
aiming at the problem that the three-phase insulating short jack burns out when in operation, the flexible cable outer sheath has different degrees of burn, the factors such as environmental weather, flexible cable structure, field operation condition and the like are analyzed and demonstrated when in operation, a discharging loop is searched, and the reasons for the short jack burn out and the flexible cable burn out are found.
The operation process is divided into three stages, wherein the first stage is to lay a bypass system and lap joint a flexible cable, and the bypass system is put into use; the second stage is to replace equipment to be overhauled by a construction team; and the bypass system in the third stage is out of operation, and the bypass flexible cable is removed and recycled.
During analysis, the second stage is found to be rainy when the bypass system is running, the air humidity is high, the insulation short jack is possibly wetted, the insulation performance is reduced, and the leakage current is increased.
Meanwhile, analysis of the bypass cable finds that the bypass flexible cable is respectively an outer household sleeve, a shielding layer, an outer semi-conductive layer, an insulator, an inner semi-conductive layer and a conductor from outside to inside, wherein the burn part is an outer sheath, and the outer sheath has no insulating property; the shielding layer has the functions of shielding electromagnetic field and protecting ground (the cable core wire is broken, and the leaked current can flow into the ground network along the shielding layer to play a role of safety protection).
Because the lines are bare wires GJL-240, the metal housing portion of the bypass load switch is grounded, and the flexible cable quick plug is connected to the bypass load switch.
In summary, analysis shows that the insulation performance of the short insulation jack is reduced due to rain, the overhead line is a bare conductor, the flexible cable sheath is broken down, and the shielding layer and the bypass load switch metal shell are grounded, so that a current loop shown in fig. 2 is formed.
Based on this, it is considered that when air is wet or the insulating short jack is dirty, the insulating performance cannot be ensured, and the shielding layer of the bypass flexible cable is grounded, so that a current loop is formed, the insulating short jack and the bypass system (cable and bypass switch) are burnt out when the bypass flexible cable is light, and the line is lost to ground when the bypass flexible cable is heavy.
For this purpose, the invention designs a10 kV live working bypass flexible cable suspension device which comprises an insulating sleeve 1, an insulating rod 2 and a bypass cable clamping device.
The insulating sleeve 1 is sleeved on the exposed bare conductor 6, the lower end of the insulating sleeve 1 is provided with the lifting lug 3, in the embodiment, the effective length of the insulating sleeve 1 is about 20cm, the insulating sleeve is made of epoxy resin glass fiber reinforced plastic (hard) materials, and an insulating anti-slip rubber material is lined to play a role in insulation of over 20kV, so that the insulating rod 2 is prevented from forming a current loop due to high humidity and reduced dirt insulating performance, and an auxiliary insulating effect is realized; and the stress of the overhead conductor is evenly spread, the situation that the bypass flexible cable is broken due to the fact that about 30kg of weight is concentrated on one point of the conductor is avoided, and the insulating anti-skid rubber material can prevent the left insulating sleeve 1 from moving left and right.
The insulating rod 2 one end has the shackle, through shackle and lug 3 cooperation with insulating sleeve 1 fixed connection, the other end has bypass cable fastener and bypass cable 5 detachable fixed connection to play the effect of fixed bypass cable, in this embodiment, insulating rod 2 has adopted the material of 20kV above insulation grade, for example epoxy glass steel material, effective insulation length 0.4 meters, and has certain mechanical strength, and its insulating properties is very big promotion than insulating short jack, can regard as main insulation to use.
In this embodiment, the bypass cable 5 wire clip adopts the circuit wire clip principle, and its specific structure can refer to current strain clamp, because it is prior art, and this department is unnecessary to describe, and its material is epoxy glass steel material (stereoplasm), possesses certain mechanical strength, and the quick installation of being convenient for just firm, inside lining insulating anti-skidding rubber material is in order further to strengthen insulating effect.
In addition, in this embodiment, the lifting lug 3 is detachably and fixedly connected with the insulating sleeve 1, so that the replacement of components is facilitated, and the subsequent maintenance is facilitated.
When the insulating rocker is used, before installation, 2500V or 5000V of an insulating rocker is required to be used for carrying out point measurement on the main insulation (insulating short rod) of the suspension device at least at three points, and the insulating resistance is more than 700MΩ, so that the insulating rocker can be used in a qualified way; the insulating sleeve 1 and the insulating wire clamping device 4 of the device should be wiped, so that no dirt, water drops, damage and the like are ensured.
Then the following steps are adopted for installation:
s1, operating the insulating arm trolley to reach a line operation station, and sleeving the insulating sleeve on the electrified wire.
Because the sleeve is internally provided with anti-skid measures, the sleeve is prevented from sliding left and right.
S2, fixedly connecting the insulating short rod with the lifting lug of the insulating sleeve through shackle.
In this embodiment, the shackle has a self-locking function.
S3, hanging 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 cables are all hung, overlapping the bypass flexible cable to an electrified line phase by phase to complete construction of a bypass system.
In this embodiment, the high-voltage drainage wire clamp of the bypass cable sags by 1.2 meters, that is, the distance from the wire clamp to the insulating wire clamp is 1.2m, and the overlap length is reserved.
In summary, according to the 10kV live working bypass flexible cable suspension device and the installation method thereof provided by the invention, the insulating sleeve is sleeved on the exposed bare conductor, so that an insulating effect of over 20kV is achieved, a current loop is prevented from being formed due to the fact that the insulating rod is high in humidity and low in dirt insulating performance, an auxiliary insulating effect is achieved, meanwhile, the short jack is replaced by a hard insulating rod, and the phenomenon that the insulating performance of the bypass cable is reduced due to humidity and dirt is avoided, so that the bypass cable is burnt or burnt.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (3)
1. The utility model provides a10 kV live working bypass flexible cable suspension device installation method, a10 kV live working bypass flexible cable suspension device that uses includes insulating sleeve, insulator spindle and insulating fastener, insulating sleeve detachably fixed connection, the other end and insulating fastener fixed connection, the one side of insulator spindle towards the insulator spindle has the lug, the one end of insulator spindle towards the insulator spindle has the shackle, the insulating spindle realizes with insulating sleeve's detachably fixed connection through being connected between lug and the shackle, its characterized in that includes the step:
s1, operating an insulating arm trolley to sleeve the 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 cable to an operation position, enabling the insulating wire clamping device to clamp the three-phase bypass flexible cable respectively, enabling the bypass flexible cable to naturally droop, and after the three-phase bypass flexible cable is suspended, overlapping the bypass flexible cable to an electrified line phase by phase, so that the construction of a bypass system is completed.
2. The method of installing a 10kV live-wire bypass flexible cable suspension device of claim 1, further comprising the steps of:
S0, performing point measurement on the insulating rod at least at three points by using an insulating rocking meter, ensuring that the insulating resistance of the insulating rod is more than 700MΩ, and wiping the insulating sleeve and the insulating wire clamp to ensure that the insulating sleeve and the insulating wire clamp are free from dirt, water drops and damage.
3. The method for installing a 10kV live working bypass flexible cable suspension device according to claim 1, wherein a distance from the high-voltage drain wire clamp of the bypass cable to the insulating wire clamp 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 CN115241800A (en) | 2022-10-25 |
| CN115241800B true CN115241800B (en) | 2024-04-30 |
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Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
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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 |
|---|---|
| CN115241800A (en) | 2022-10-25 |
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