CN108336684B - Cable outer protection sleeve inner fault repair die and repair method - Google Patents
Cable outer protection sleeve inner fault repair die and repair method Download PDFInfo
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- CN108336684B CN108336684B CN201810322904.4A CN201810322904A CN108336684B CN 108336684 B CN108336684 B CN 108336684B CN 201810322904 A CN201810322904 A CN 201810322904A CN 108336684 B CN108336684 B CN 108336684B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
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Abstract
The invention provides a cable outer sheath pipe inner fault repair die and a repair method, which are used for repairing the cable outer sheath in a pipeline, wherein the cable outer sheath pipe inner fault repair die comprises: the device comprises a hoop, a pressurizing device and a material penetrating pipe, wherein the pressurizing device is arranged outside the hoop, one surface of the hoop facing the cable is in a shape with the outer diameter matched with the outer diameter of the cable, so that the hoop can hold the cable tightly when repairing operation is carried out, and the hoop and the pressurizing device can slide along the surface of the cable in a pipeline; the anchor ear is provided with a material conveying channel, the material penetrating pipe fitting is connected with the material conveying channel, and a remote tripping mechanism for connecting the material conveying penetrating pipe fitting is further arranged in the material conveying channel. The invention can repair the cable outer sheath faults in the depth of the calandria or the pipe-jacking after accurately positioning the cable outer sheath fault points in the pipe, is suitable for calandria or pipe-jacking pipelines with different voltage levels, and can adapt to the internal space of the pipeline.
Description
Technical Field
The invention relates to the technical field of power transmission and distribution line overhaul, in particular to a repair die and a repair method for faults in an outer protective sleeve of a cable.
Background
With the development of urban economy, the power cable is applied in a large scale, and is limited by urban construction and environment, and the pipe penetrating and laying mode is also widely applied, including cable calandria and horizontal directional drilling and traversing mode.
Because the cable tube is buried under the urban road, the calandria is generally encapsulated by concrete, and the horizontal directional drilling penetrating tube is buried very deeply (generally more than 5 meters), when the cable outer sheath fails in the tube, the conventional cable outer sheath failure repair mode is not suitable for the penetrating tube laying mode. If the cable outer sheath is seriously damaged, the fault property is not judged in time, the reason is not found, the fault is not repaired in time, and the cable fault can be possibly tripped.
In the prior art, for a through pipe laying mode, the method for repairing faults in the outer protective sleeve of the high-voltage cable is to strip the conductive layers of the outer protective sleeves at the two ends of the pipe orifice of the faulty cable, so that the cable is suspended relative to the ground in the pipe, and test current cannot flow into the ground through the fault point of the outer protective sleeve, thereby improving the insulation resistance test value of the outer protective sleeve. However, the method cannot truly repair the faults of the cable outer sheath in the pipe, and cannot essentially solve the problem that the faults exist in the cable outer sheath.
Disclosure of Invention
The invention provides a repair die and a repair method for faults in a cable outer protective sleeve, which solve the problem that faults in the cable outer protective sleeve are difficult to repair.
In order to solve the problems, the invention provides the following technical scheme:
a cable outer jacket tube inner failure repair die, the cable outer jacket tube inner failure repair die comprising: the anchor ear, the pressurizing device and the material penetrating pipe fitting; the pressurizing device is arranged outside the anchor ear, one surface of the anchor ear facing the cable is in a shape with the outer diameter matched with the cable, so that the anchor ear can hold the cable tightly during repairing operation, and the anchor ear can slide along the surface of the cable in the pipeline; the anchor ear is provided with a material conveying channel, the material penetrating pipe fitting is connected with the material conveying channel, and a remote tripping mechanism for connecting the material conveying penetrating pipe fitting is further arranged in the material conveying channel.
During operation, two inner fault repairing moulds of the outer sheath of the cable are used, the moulds are pushed, the fault point of the outer sheath of the cable is placed at the middle point between the inner fault repairing moulds of the outer sheath of the cable, and then the repairing material is conveyed to the space between the inner fault repairing moulds of the outer sheath of the cable by utilizing the material conveying penetrating pipe and the material conveying channel.
The invention can repair the cable outer sheath faults in the depth of the calandria or the pipe-jacking after accurately positioning the cable outer sheath fault points in the pipe, is suitable for calandria or pipe-jacking pipelines with different voltage levels, and can adapt to the internal space of the pipeline.
Preferably, the side of the anchor ear facing the cable is arc-shaped, so that the side of the anchor ear facing the cable is better attached to the cable.
Preferably, the pressurizing device is an inflatable bubble, the inflatable bubble can be filled in the space in the pipe after inflation, the space in the pipe is plugged, and the hoop is wrapped, so that the hoop can hold the cable tightly.
Further, an inflation channel communicated with the inflation bubble is further arranged on the anchor ear, the inflation channel can be connected with an inflation pipe penetrating member, the other end of the inflation pipe penetrating member is connected with an air pump, and the inflation bubble is inflated by the air pump.
Furthermore, the inside long-range tripping device that is used for connecting the inflation poling piece that sets up of inflation pipeline, after the inflation finishes, can be with inflation poling piece tripping and withdraw from the pipeline.
Preferably, the anchor ear is further provided with an imaging element, so that the midpoint between the two cable outer sheath tube inner fault repair dies and the cable outer sheath fault point are overlapped when the anchor ear is in operation.
Further, the anchor ear is further provided with an imaging channel, the imaging channel can be connected with an imaging penetrating pipe fitting, an imaging element is arranged on the imaging penetrating pipe fitting, a remote tripping mechanism used for connecting the imaging penetrating pipe fitting is arranged inside the imaging channel, after the middle point between the fault repairing dies in the two cable outer protective sleeves is overlapped with the fault point of the cable outer protective sleeves, the imaging penetrating pipe fitting can be tripped out of the pipeline, and the imaging element can be effectively protected.
The invention also provides a method for repairing the faults in the cable outer protective sleeve, which comprises the following steps:
1) Assembling all parts of the fault repair mould in the cable outer protective sleeve;
2) Pushing the cable outer sheath pipe inner fault repair die to a cable outer sheath fault point in the pipeline along the cable through the pipe penetrating piece;
3) After observing and ensuring that the midpoint between the two inner fault repair moulds of the outer sheath of the cable coincides with the fault point of the outer sheath of the cable through the imaging element, tripping the imaging pipe penetrating piece and exiting the pipeline;
4) Filling gas into the inflation bubble of the fault repair mould in the cable outer sheath tube through the pipe penetrating member to expand the inflation bubble to fill the space in the tube, and tripping the inflation pipe penetrating member and exiting the pipeline after the inflation is finished;
5) Heating the insulating repair material into fluid, filling the fluid into a space between fault repair dies in two cable outer protective sleeves through a material conveying pipe penetrating member, and tripping and exiting the pipeline after the fluid insulating repair material is solidified after filling;
6) And measuring the insulation condition of the cable outer sheath by adopting a 500V insulation megger, and if the cable outer sheath is tested to be qualified, proving that the repair is successful.
Compared with the prior art, the invention has the following beneficial effects:
the invention can repair the cable outer sheath faults deep in the calandria or the pipe-jacking after accurately positioning the cable outer sheath fault points in the pipe, is suitable for calandria or pipe-jacking pipelines with different voltage levels, can self-adapt to the inner space of the pipeline, further improves the reliability of the cable, increases the repair speed of the cable, reduces the power failure time of the power grid and saves the repair cost of the fault.
Drawings
FIG. 1 is a schematic structural view of a high voltage cable outer jacket tube inner fault repair die of the present invention;
FIG. 2 is a schematic diagram showing a use state of a fault repair die in a high-voltage cable outer sheath tube;
in the figure: 1-a fault repair die in an outer protective sleeve of a cable; 2-cables; 3-imaging the penetrating pipe fitting; 4-inflating the penetrating pipe fitting; 5-material delivery through pipe fitting; 6-cable outer sheath fault points; 7-piping; 11-hoops; 12-pressurizing means; 13-imaging channels; 14-an inflation channel; 15-a material delivery channel; 16-imaging element.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Referring to fig. 1 and 2, a cable outer jacket tube inner fault repair die 1, the cable outer jacket tube inner fault repair die comprising: the anchor ear 11, the pressurizing device 12 and the material penetrating pipe fitting 5; the pressurizing device 12 is arranged outside the anchor ear 11, one surface of the anchor ear surface 11 facing the cable 2 is in a shape matched with the outer diameter of the cable 2, so that the anchor ear 11 can hold the cable 2 tightly when repairing operation is carried out, and the anchor ear 11 can slide along the surface of the cable 2 in the pipeline 7; the hoop 11 is provided with a material conveying channel 5, a material penetrating pipe 15 is connected with the material conveying channel 5, and a remote tripping mechanism for connecting the material conveying penetrating pipe 15 is further arranged inside the material conveying channel 5.
During operation, two inner fault repairing moulds 1 of the outer sheath of the cable are used, the moulds are pushed, the fault point of the outer sheath of the cable is placed at the middle point between the two inner fault repairing moulds 1 of the outer sheath of the cable, and then the repairing material is conveyed to the space between the two inner fault repairing moulds 1 of the outer sheath of the cable by using the material conveying pipe penetrating piece 5 and the material conveying channel 15.
The embodiment can repair cable outer sheath faults deep in the calandria or the pipe jacking after the cable outer sheath fault point 6 in the pipe is accurately positioned, is suitable for calandria or pipe jacking pipelines with different voltage levels, and can adapt to the inner space of the pipeline.
Specifically, in this embodiment, the surface of the anchor ear 11 facing the cable 2 is in a circular arc shape, so that the anchor ear 11 better fits the cable 2 to the surface of the cable 2.
Specifically, the pressurizing device 12 in this embodiment is an inflatable bubble, and the inflatable bubble can fill the space in the pipeline 7 after inflation, so as to seal the space in the pipeline 7, wrap the anchor ear 11, and enable the anchor ear 11 to hold the cable 2 tightly.
Specifically, the hoop 11 is further provided with an inflation channel 14 communicated with the inflation bubble, the inflation channel 14 can be connected with one end of the inflation pipe penetrating member 4, the other end of the inflation pipe penetrating member 4 is connected with an air pump, and the inflation bubble is inflated by the air pump.
Specifically, in this embodiment, the inflation pipe 14 is internally provided with a remote tripping mechanism for connecting the inflation pipe penetrating member 4, and after inflation is completed, the inflation pipe penetrating member 4 can be tripped out of the pipe 7.
Specifically, in this embodiment, the hoop 11 is further provided with an imaging channel 13, the imaging channel 13 may be connected with the imaging penetrating pipe member 3, the imaging penetrating pipe member 3 is provided with an imaging element 16, a remote tripping mechanism for connecting the imaging penetrating pipe member 3 is disposed inside the imaging channel 13, after the midpoint between the two cable outer sheath inner fault repairing dies 1 is ensured to coincide with the cable outer sheath fault point 6, the imaging penetrating pipe member 3 may be tripped out of the pipeline, and the imaging element may be effectively protected.
The embodiment also provides a method for repairing faults in the cable outer protective sleeve, which comprises the following steps:
1) Assembling all parts of the fault repair die 1 in the cable outer protective sleeve;
2) Pushing the cable outer sheath pipe inner fault repair die 1 to a cable outer sheath fault point 6 inside the pipeline 7 along the cable 2 through a penetrating pipe fitting;
3) After observing and ensuring that the midpoint between the two cable outer sheath inner fault repair dies 1 coincides with the cable outer sheath fault point 6 through the imaging element 16, tripping the imaging penetrating pipe fitting 3 and exiting the pipeline 7;
4) Filling gas into the gas filling bubbles of the fault repair mould 1 in the cable outer sheath pipe through the gas filling pipe penetrating piece 4 to expand the gas filling bubbles to fill the space in the pipeline 7, and tripping the gas filling pipe penetrating piece 4 and exiting the pipeline 7 after the gas filling is finished;
5) After heating the insulating repair material into fluid, filling the fluid into the space between the fault repair dies 1 in the two cable outer protective sleeves through the material conveying pipe penetrating members 5, and after the fluid insulating repair material is solidified after filling, tripping the material conveying pipe penetrating members 5 and exiting the pipeline 7;
6) And measuring the insulation condition of the cable outer sheath by adopting a 500V insulation megger, and if the cable outer sheath is tested to be qualified, proving that the repair is successful.
The embodiment can repair cable sheath faults deep in the calandria or the pipe jacking after the cable sheath fault point 6 in the pipe is accurately positioned, is applicable to calandria or pipe jacking pipelines with different voltage levels, can adapt to the inner space of the pipeline, further improves the reliability of the cable, increases the repair speed of the cable, reduces the power failure time of the power grid and saves the repair cost of the fault.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (2)
1. The repair method of the cable outer sheath pipe inner fault repair die is characterized by being applied to the cable outer sheath pipe inner fault repair die, and the cable outer sheath pipe inner fault repair die comprises the following steps: the anchor ear, the pressurizing device and the material penetrating pipe fitting;
the pressurizing device is arranged outside the anchor ear, one surface of the anchor ear facing the cable is in a shape with the outer diameter matched with the cable, so that the anchor ear can tightly hold the cable when repairing operation is carried out, and the anchor ear can slide along the surface of the cable in the pipeline; the pressurizing device is an inflatable bubble, an inflation channel communicated with the inflatable bubble is further arranged on the anchor ear, and the inflation channel can be connected with an inflation pipe penetrating member; a remote tripping mechanism for connecting the inflation pipe penetrating member is arranged in the inflation channel;
the hoop is provided with a material conveying channel, the material penetrating pipe fitting is connected with the material conveying channel, and a remote tripping mechanism for connecting the material conveying penetrating pipe fitting is also arranged in the material conveying channel;
the hoop is also provided with an imaging element, and the hoop is also provided with an imaging channel which can be connected with an imaging pipe penetrating piece with the imaging element; a remote tripping mechanism for connecting the imaging penetrating pipe fitting is arranged in the imaging channel;
the repair method comprises the following steps:
1) Assembling all parts of the fault repair mould in the cable outer protective sleeve;
2) Pushing the cable outer sheath pipe inner fault repair die to a cable outer sheath fault point in the pipeline along the cable through the pipe penetrating piece;
3) After observing and ensuring that the midpoint between the two inner fault repair moulds of the outer sheath of the cable coincides with the fault point of the outer sheath of the cable through the imaging element, tripping the imaging pipe penetrating piece and exiting the pipeline;
4) Filling gas into the inflation bubble of the fault repair mould in the cable outer sheath tube through the pipe penetrating member to expand the inflation bubble to fill the space in the tube, and tripping the inflation pipe penetrating member and exiting the pipeline after the inflation is finished;
5) Heating the insulating repair material into fluid, filling the fluid into a space between fault repair dies in two cable outer protective sleeves through a material conveying pipe penetrating member, and tripping and exiting the pipeline after the fluid insulating repair material is solidified after filling;
6) And measuring the insulation condition of the cable outer sheath by adopting a 500V insulation megger, and if the cable outer sheath is tested to be qualified, proving that the repair is successful.
2. The repair method of a fault repair die in a cable outer sheath according to claim 1, wherein the side of the anchor ear facing the cable is arc-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810322904.4A CN108336684B (en) | 2018-04-11 | 2018-04-11 | Cable outer protection sleeve inner fault repair die and repair method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810322904.4A CN108336684B (en) | 2018-04-11 | 2018-04-11 | Cable outer protection sleeve inner fault repair die and repair method |
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| CN108336684A CN108336684A (en) | 2018-07-27 |
| CN108336684B true CN108336684B (en) | 2023-05-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993870B (en) * | 2021-03-24 | 2022-05-10 | 山西六建集团有限公司 | Construction method for electric power calandria in miniature pipe jacking pipeline |
| CN114694902B (en) * | 2022-06-02 | 2022-08-02 | 江苏和谐新能源科技有限公司 | Novel cable insulation sleeve |
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| CN208015227U (en) * | 2018-04-11 | 2018-10-26 | 广东电网有限责任公司 | A kind of cable jacket pipe internal fault repairing mould |
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