CN115733099A - Cable repairing method and device, nonvolatile storage medium and computer equipment - Google Patents

Abstract

The invention discloses a cable repair method, a cable repair device, a nonvolatile storage medium and computer equipment. Wherein, the method comprises the following steps: determining a target cable to be repaired in a target area; and injecting a siloxane repairing liquid into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable. The invention solves the technical problem that no scheme for repairing a cable affected with damp or water is available in the prior art.

Description

Cable repairing method and device, nonvolatile storage medium and computer equipment

Technical Field

The invention relates to the technical field of power system maintenance, in particular to a cable repair method, a cable repair device, a nonvolatile storage medium and computer equipment.

Background

In the urban power grid transformation project, electric wires and cables, particularly polyethylene insulated power cables, have been widely used. But due to the particularity of the cables, special requirements are imposed on the installation, operation and maintenance of the cables. The fact that the resistance of the insulating material of the cable is reduced due to the fact that the cable is affected with damp or water is a plurality of important aspects causing operation accidents of a wire and cable circuit.

In the normal operation of the cable, if the cable breaks down or other faults due to some reason, external moisture enters the interior of the water blocking tape or the cable core of the intact part from the fault point. If the fault point is just immersed in the accumulated water, even if the fault point is cut off and the intermediate joint is manufactured again, the cable can not meet related electrical tests in a short time due to the invasion of liquid water and cannot be put into operation. There is no solution in the prior art to repair cables that are subjected to moisture or water ingress.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

The embodiment of the invention provides a cable repair method and device, a nonvolatile storage medium and computer equipment, which at least solve the technical problem that no scheme for repairing a cable affected with damp or water is available in the prior art.

According to an aspect of an embodiment of the present invention, there is provided a cable repair method including: determining a target cable to be repaired in a target area; and injecting a siloxane repairing liquid into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable.

Optionally, injecting a silicone repair fluid into the target cable, comprising: connecting a first port of a target cable with a first air compressor; controlling a first air compressor to inject inert gas into the target cable through the first port, wherein the inert gas is used for discharging water in the target cable core from the second port of the target cable; stopping injecting the inert gas into the target cable after the second port does not drain water outwards any more; and after the inert gas injection is stopped, injecting the siloxane repairing liquid into the target cable.

Optionally, injecting a silicone repair fluid into the target cable, comprising: controlling a first air compressor to increase the pressure in a liquid storage tank to enable the pressure in the liquid storage tank to be higher than standard atmospheric pressure and lower than a first threshold value, wherein the liquid storage tank is used for storing siloxane repairing liquid; and under the condition that the internal pressure of the liquid storage tank is higher than the standard atmospheric pressure and lower than a first threshold value, injecting the siloxane repairing liquid into the target cable.

Optionally, injecting a silicone repair fluid into the target cable, comprising: connecting the second port with a second air compressor; controlling a second air compressor to pump air from the target cable so that the pressure inside the target cable is lower than a second threshold value, wherein the boiling point of water at the pressure of the second threshold value is lower than the temperature of the environment where the target cable is located; controlling a first air compressor to introduce inert gas into the target cable core under the condition that the internal pressure of the target cable is kept lower than a second threshold value; and injecting the siloxane repair liquid into the target cable through the first port in the case that the content of the inert gas in the gas discharged from the second port is greater than a third threshold value.

Optionally, determining a target cable to be repaired in the target area includes: stopping power supply to the target area; measuring insulation resistance and dielectric loss of each cable in a plurality of cables in a target area; and determining the cable with the maximum damage degree in the plurality of cables as a target cable according to the insulation resistance and the dielectric loss of each cable in the plurality of cables.

Optionally, injecting the silicone repair liquid into the target cable for a time period exceeding a predetermined time period, such that the silicone repair liquid diffuses in the target cable; and in the case that the holding time exceeds the predetermined time, the power supply of the target cable is resumed.

Optionally, restoring power to the target cable comprises: measuring the insulation resistance and the dielectric loss of the repaired target cable, and judging that the target cable is successfully repaired when the insulation resistance and the dielectric loss of the target cable meet the preset conditions; and in the case that the target cable is successfully repaired, restoring the power supply of the target cable.

According to another aspect of the embodiments of the present invention, there is also provided a cable repair apparatus including: the determining module is used for determining a target cable to be repaired in a target area; and the injection module is used for injecting the siloxane repairing liquid into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable.

According to another aspect of the embodiments of the present invention, there is also provided a non-volatile storage medium, which includes a stored program, wherein a device in which the non-volatile storage medium is controlled to execute any one of the above cable repair methods when the program is executed.

According to a further aspect of the embodiments of the present invention, there is also provided a computer device, including a processor, configured to execute a program, where the program executes to perform any one of the above cable repair methods.

In the embodiment of the invention, a target cable to be repaired in a target area is determined; the siloxane repairing liquid is injected into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable, and the purpose that the damaged insulating layer has the waterproof capacity again by using the siloxane repairing liquid is achieved, so that the technical effect of repairing a damp or water-entering cable is achieved, and the technical problem that no scheme for repairing the damp or water-entering cable exists in the prior art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 shows a block diagram of a hardware configuration of a computer terminal for implementing a cable repair method;

FIG. 2 is a schematic flow chart of a cable repair method provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic illustration of a hydrolysis-condensation reaction of a healing fluid provided in accordance with an alternative embodiment of the present invention;

FIG. 4 is a schematic illustration of the diffusion of a silicone repair fluid in a cable insulation layer provided in accordance with an alternative embodiment of the present invention;

fig. 5 is a block diagram of a cable repair method according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

First, partial terms or terms appearing in the description of the embodiments of the present application are applied to the following explanations:

a Cross-Linked PolyEthylene cable (XLPE for short) is a cable which plays an extremely important role in power supply and power grid.

Methylphenyldimethoxysilane (PMDMS) is a colorless or pale yellow transparent liquid.

Tetraisopropyl Titanate (TIPT) is mainly used as a catalyst for transesterification and condensation reactions in organic synthesis.

In accordance with an embodiment of the present invention, there is provided a method embodiment of cable repair, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.

The method provided by the first embodiment of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Fig. 1 shows a block diagram of a hardware structure of a computer terminal for implementing a cable repair method. As shown in fig. 1, the computer terminal 10 may include one or more processors (shown in the figures as 102a, 102b, … …,102 n) (which may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data. Besides, the method can also comprise the following steps: a display, an input/output interface (I/O interface), a Universal Serial BUS (USB) port (which may be included as one of the ports of the BUS), a network interface, a power source, and/or a camera. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.

It should be noted that the one or more processors and/or other data processing circuitry described above may be referred to generally herein as "data processing circuitry". The data processing circuitry may be embodied in whole or in part in software, hardware, firmware, or any combination thereof. Further, the data processing circuit may be a single stand-alone processing module, or incorporated in whole or in part into any of the other elements in the computer terminal 10. As referred to in the embodiments of the application, the data processing circuit acts as a processor control (e.g. selection of a variable resistance termination path connected to the interface).

The memory 104 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the cable repair method in the embodiment of the present invention, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, implementing the cable repair method of the application program. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with the user interface of the computer terminal 10.

Fig. 2 is a schematic flow chart of a cable repair method according to an embodiment of the present invention, as shown in fig. 2, the method includes the following steps:

step S202, determining a target cable to be repaired in the target area.

In this step, the cable to be repaired is determined as the target cable. The target area is an area, some cables in the area are affected with damp or water, and cable repair personnel need to determine the target cable needing repair in the target area.

And step S204, injecting a siloxane repairing liquid into the target cable, wherein the siloxane repairing liquid is used for repairing an insulating layer of the target cable.

In the step, after the cable to be repaired is determined, the target cable needs to be repaired, the siloxane repairing liquid is injected into the target cable, the siloxane repairing liquid can react with water molecules in the target cable, the reaction product can occupy pores of a water tree in the cable, the moisture can be prevented from invading an insulating layer of the cable, the electric field distortion of the defect position is relieved, and even if the moisture invades again, the product can react with the water molecules again to inhibit the growth of the water tree.

Through the steps, the purpose that the damaged insulating layer has the waterproof capacity again by using the siloxane repairing liquid can be achieved, so that the technical effect of repairing a damp or water-entering cable is achieved, and the technical problem that no scheme for repairing the damp or water-entering cable exists in the prior art is solved.

As an alternative example, injecting the silicone repair fluid into the target cable may be accomplished by: connecting a first port of the target cable with a first air compressor; controlling a first air compressor to inject inert gas into the target cable through the first port, wherein the inert gas is used for discharging water in the target cable core from the second port of the target cable; stopping injecting the inert gas into the target cable after the second port does not drain water outwards any more; and after the inert gas injection is stopped, injecting the siloxane repairing liquid into the target cable.

Optionally, before the siloxane repairing liquid is injected, some inert gas may be injected into the target cable, one port of the target cable is used as a first port and is connected with a first air compressor, the first air compressor is controlled to inject the inert gas into the target cable through the first port, a large amount of accumulated water in the target cable may not be discharged, and at the moment, the inert gas is injected from the first port and is discharged from a second port; when the second port does not drain outwards any more, the accumulated water in the target cable is reduced by a large part, even if the water remained in the target cable still can be removed through a subsequent repairing method, at the moment, the inert gas injection into the target cable is stopped, and then the siloxane repairing liquid is injected to repair the insulating layer of the target cable. It should be noted that, because the cable is internally provided with the intermediate interface, after the inert gas is introduced, under the condition that the sealing performance of the intermediate interface is not strong, the water amount discharged from the second port of the target cable is abnormal, and a worker checks the sealing condition of the intermediate joint of the target cable, so as to avoid waste when the siloxane repairing liquid is injected. The inert gas can extrude water in the target cable away to discharge a large part of the water, and meanwhile, the high-purity inert gas has a drying effect, so that the water remained in the target cable can be effectively reduced, namely, the water remained in the target cable and reacting with the injected siloxane repairing liquid to consume siloxane is reduced, and the technical effect of reducing the consumption of the siloxane is realized. Specifically, the inert gas may be nitrogen.

As an alternative example, injecting the silicone repair fluid into the target cable may be accomplished by: controlling a first air compressor to increase the pressure in a liquid storage tank to enable the pressure in the liquid storage tank to be higher than standard atmospheric pressure and lower than a first threshold value, wherein the liquid storage tank is used for storing siloxane repairing liquid; and injecting the siloxane repairing liquid into the target cable under the condition that the internal pressure of the liquid storage tank is higher than the standard atmospheric pressure and lower than a first threshold value.

Optionally, the siloxane repairing liquid is injected into the target cable through a liquid storage tank, the liquid storage tank is a device filled with the siloxane repairing liquid, the liquid in the liquid storage tank needs to be pressurized, the air pressure inside the liquid storage tank is higher than the standard atmospheric pressure and lower than a first threshold, a pressure difference is generated between the air pressure and the atmospheric pressure in the target cable, the siloxane repairing liquid is injected into the target cable through the pressure difference, and the purpose of injecting the siloxane repairing liquid into the target cable is achieved. Wherein, the first threshold is set in advance, and needs to be higher than atmospheric pressure, preferably, 0.8MPa, because there is an intermediate joint in the target cable, when the pressure in the liquid storage tank is higher than 0.8MPa, the force of the siloxane repairing liquid acting on the target cable will be greater than the holding force of the intermediate joint, and the intermediate joint of the target cable will collapse.

As an alternative example, injecting the silicone repair fluid into the target cable may be accomplished by: connecting the second port with a second air compressor; controlling a second air compressor to pump air from the target cable so that the pressure inside the target cable is lower than a second threshold value, wherein the boiling point of water at the pressure of the second threshold value is lower than the temperature of the environment where the target cable is located; controlling a first air compressor to introduce inert gas into the target cable core under the condition that the internal pressure of the target cable is kept lower than a second threshold value; and injecting the siloxane repair liquid into the target cable through the first port in the case that the content of the inert gas in the gas discharged from the second port is greater than a third threshold value.

Optionally, before injecting the siloxane repairing liquid, the moisture in the target cable may be removed by a pressure reduction manner, first, the second port of the target cable is connected to the second air compressor, the first port is connected to the first air compressor, the second air compressor is controlled to reduce the pressure value inside the target cable by air extraction, so that the pressure value is lower than a second threshold, when the pressure value inside the target cable is lower than the second threshold, the boiling point of water inside the target cable is reduced to below the ambient temperature of the target cable, that is, at the ambient temperature of the target cable, the water inside the target cable is gasified into water vapor, at this time, in a case that the internal pressure of the target cable is lower than the second threshold, the first air compressor is controlled to introduce inert gas into the core of the target cable through the first port, and discharge the water vapor through the second port, and when the content of the inert gas discharged from the second port is higher than a third threshold, it may be considered that the discharge of the water vapor is relatively sufficient, and then the siloxane repairing liquid is injected into the target cable. This optional embodiment can go on after letting in inert gas, can further discharge the moisture in the target cable, reduces siloxane repair liquid and gets into the consumption that the moisture that remains in the target cable carries out the reaction after the cable, is favorable to siloxane repair liquid to the restoration of target cable insulating layer, is favorable to improving the utilization ratio of siloxane repair liquid.

As an alternative embodiment, determining a target cable to be repaired in a target area may be implemented by the following steps: stopping power supply to the target area; measuring insulation resistance and dielectric loss of each cable in a plurality of cables in a target area; and determining the cable with the maximum damage degree in the plurality of cables as a target cable according to the insulation resistance and the dielectric loss of each cable in the plurality of cables.

Optionally, a target cable to be repaired is determined in the target area, power supply of the target area may be stopped first, so that the repair of the cable in the target area is safer, and then insulation resistance and dielectric loss parameters of each of a plurality of cables in the target area are measured, the smaller the insulation resistance is, the higher the loss degree of the cable is, the worse the insulation performance is, the larger the dielectric loss is, the higher the loss degree of the cable is, so that the cable with the largest damage degree in the plurality of cables may be selected as the target cable according to the values of the insulation resistance and the dielectric loss parameters, and the target cable may be repaired.

As an alternative embodiment, the following steps may be further included: after the siloxane repairing liquid is injected into the target cable, the keeping time is longer than the preset time, so that the siloxane repairing liquid is diffused in the target cable; and in the case that the holding time exceeds the predetermined time, the power supply of the target cable is resumed.

Optionally, after the siloxane repairing liquid is injected, the power-off state needs to be maintained for a period of time, so that the siloxane is fully diffused in the insulating layer of the target cable and fully reacts with water molecules still remaining in the target cable, a better repairing effect is achieved, the power-off state is maintained, the time for fully repairing the target cable by the siloxane repairing liquid needs to exceed a preset time, the power supply of the target cable can be recovered after the preset time is exceeded, and the target cable can normally work after being repaired. Preferably, the predetermined time may be one day.

As an alternative embodiment, the restoration of the power supply of the target cable can be achieved by the following steps: measuring the insulation resistance and the dielectric loss of the repaired target cable, and judging that the target cable is successfully repaired when the insulation resistance and the dielectric loss of the target cable meet the preset conditions; and in the case that the target cable is successfully repaired, restoring the power supply of the target cable.

Optionally, before the power supply of the target cable is restored, after the power failure state is maintained so that the time for the siloxane repair liquid to sufficiently repair the target cable should exceed a predetermined time, the preliminarily repaired target cable may be tested, the insulation resistance and the dielectric loss of the repaired target cable are measured, when the insulation resistance and the dielectric loss of the target cable meet predetermined conditions, it is determined that the target cable is successfully repaired, and when the target cable is successfully repaired, the power supply of the target cable is restored. The predetermined condition may be changed according to a parameter of the target cable, and specifically may be a national standard value corresponding to the parameter of the target cable.

As a specific example, when repairing a cable, preparation work before repair is required: performing power failure operation according to the requirements of industrial standards, selecting a typical cable with a target area with a damp defect, stripping partial outer sheaths, armor layers, copper shielding layers and semi-conducting layers at two ends of each phase of cable in the target area to expose about 10cm of insulating layers, cutting off partial main insulation from one port of the cable in the target area to expose a cable core for repairing and pressurizing; measuring the insulation resistance and the ultralow frequency dielectric loss of the cable in a target area, and recording data; and selecting the cable with the seriously reduced insulation degree in the cables in the target area as a target cable to be repaired in advance according to the test results of the insulation resistance and the dielectric loss of the cable.

When in repair, the adapter is firstly connected with the exposed main insulation at the end part of the target cable, so that the adapter is conveniently connected with the air compressor or the liquid storage tank in the subsequent step. Specifically, the main insulation exposed at the two ends of the target cable is wound with a certain length of waterproof insulating tape, and the adapter is connected with the main insulation exposed at the end of the target cable. Sealing the adapter at the position where the waterproof insulating tape is wound by adopting a metal hoop to prevent leakage, and connecting the other end of the target cable with the upper adapter in the same way; connecting an adapter liquid injection pipe with a liquid storage tank, connecting the liquid storage tank with an air compressor, starting a radial gas circulation test of the air compressor, and gradually increasing the air pressure in the liquid storage tank to be higher than the standard atmospheric pressure and lower than a first threshold value under the condition of ensuring the air tightness to ensure that the siloxane repairing liquid is injected; after the siloxane repairing liquid is injected, the outlet at the other end of the target cable is closed, the air pressure is reduced to the standard atmospheric pressure and is kept for a period of time, preferably, the air pressure is recommended to be kept for 1 day, so that the siloxane repairing liquid can be fully diffused from the radial direction of the cable core.

The siloxane generally contains at least 2 alkoxy groups (RO-) bonded to silicon atoms (Si) in the molecule to form a Si-OR structure capable of undergoing hydrolysis-condensation reactions. Taking the PMDMS reagent used in this embodiment as an example, after the monomer diffuses into the insulating layer, fig. 3 is a schematic diagram of the hydrolysis-condensation reaction of the repairing solution according to an alternative embodiment of the present invention, if moisture exists, the hydrolysis reaction shown in fig. 3 (a) will occur to achieve the desired moisture elimination effect, and simultaneously generate a silanol b and a byproduct methanol (CH 3 OH), wherein the methanol is very volatile and lost. Silanol b can continue to hydrolyze to form silanediol (only when the environment is very humid) or can react with itself and with Si-OCH3 in PMDMS to polymerize to form dimers, one of which is shown in fig. 3 (b). The dimer has larger molecular volume, slower diffusion and less loss, and can reduce the free volume area in the insulating layer to block the water invasion and relieve the electric field distortion at the defect if occupying the micropores of the water tree, and on the other hand, even if the water enters again, the hydrolytic group Si-OCH3 can act again to react with the water tree, thereby inhibiting the growth of the water tree. Dimers may further condense into trimers, tetramers, etc., but as the molecular volume increases, the reaction rate decreases accordingly, and steric hindrance by the XLPE matrix also inhibits the reaction.

In addition, the catalyst must reach a certain concentration to enable the polymerization reaction to proceed at a meaningful speed, fig. 4 is a schematic diagram of the diffusion of the siloxane repair liquid in the cable insulation layer provided according to the alternative embodiment of the present invention, as shown in fig. 4, the repair liquid starts to diffuse from the inner side of the insulation layer, as shown in fig. 4 (a), if the siloxane diffuses faster, the siloxane monomer that reaches the outer side of the insulation layer first is difficult to polymerize, the monomer molecule has a small volume, and may be lost from the insulation layer in a short time, so that the actual effective component of the repair liquid is reduced, and the long-term performance is reduced. The molecular weight of the PMDMS selected in the project is small, the PMDMS is easy to diffuse when the monomer is not reacted, and simultaneously, the PMDMS is matched with a catalyst TIPT (tetraisopropyl titanate), the condition shown in figure 4 (b) appears, the diffusion speeds of the PMDMS and the TIPT are similar, although the concentration of the catalyst on the outer side of the insulating layer is reduced relative to the inner side, a part of siloxane monomer can still be promoted to carry out polymerization reaction, so that the siloxane retention rate of the formula is greatly improved, and the effects of inhibiting the growth of a water tree and improving the breakdown performance are ensured to a certain extent.

It should be noted that the repair process only includes the step of repairing the cable with the silicone repair fluid, and the target cable may be subjected to nitrogen repair and/or reduced-pressure repair before injecting the silicone repair fluid into the target cable. The nitrogen restoration is to control the connection of an air compressor and an adapter, to press nitrogen into a target cable from one end of the target cable, to extrude liquid water in the target cable from the other end of the target cable, to measure the concentration of nitrogen by using an instrument at the other end of the target cable, to detect whether the air leakage phenomenon occurs at the joint part of the target cable. When the other end of the target cable detects that the nitrogen concentration is higher than the predetermined third threshold value, the liquid water in the target cable is considered to be emptied, the nitrogen injection is stopped, and the nitrogen restoration is finished. The nitrogen restoration not only can discharge liquid water in the target cable, but also has a drying effect on high-concentration nitrogen, so that the moisture in the target cable can be further reduced, and meanwhile, a gas circulation test can be performed to detect whether the air leakage phenomenon occurs at the middle joint part of the target cable.

When the cable intake water is affected with damp seriously, the initial treatment can utilize the simplest principle of pumping water, namely directly pumping out the liquid water in the wire core by using nitrogen, and also utilizes the principle that high-purity nitrogen has a drying function to fill the high-purity nitrogen into the cable wire core to dry the wire core.

Preferably, the pressure-reducing repair is performed after the nitrogen repair is performed, and although the nitrogen can discharge a large portion of the liquid water in the target cable by squeezing, a small portion of the liquid water remains in the target cable. And at the moment, the voltage reduction repair is carried out, the two ends of the target cable are connected with air compressors, the air compressor of the first port is controlled to exhaust air to reduce the pressure inside the target cable, when the pressure is reduced to a second threshold value, the boiling point of liquid water is reduced to be lower than the ambient temperature of the target cable under the pressure of the second threshold value, the liquid water in the target cable is changed into gaseous water, at the moment, the air compressor of the second port of the target cable injects nitrogen into the target cable, meanwhile, the air compressor of the first port keeps exhausting air, the nitrogen at the second port can enter the target cable, the gaseous water in the first port is exhausted out of the cable, and the voltage reduction repair of the target cable is realized. And stopping the step-down repairing until the gas pumped out from the first port of the target cable is nitrogen.

According to a calculation formula of the Claberone-Claauss equation when the temperature change is not large:

wherein T is temperature; p is pressure; Δ H _m Is the molar enthalpy of vaporization; r is a constant.

If the above formula is subjected to constant integration and the temperature variation range is not large, Δ H can be calculated _m Considered as a constant independent of temperature, the integration results as:

in the formula, P ₁ 、P ₂ The air pressure values under different states are obtained; t is ₁ 、T ₂ Is corresponding to P ₁ 、P ₂ Liquid water boiling point at pressure value; enthalpy of vaporization Δ H _m 4.07X 104 J.mol-1; r is 8.134.

Thus, we can obtain the boiling point of water at another pressure from the boiling point of water at the standard state, and look up the data to obtain the air pressure of about 101.325kPa at the standard state, the boiling point of water at this state is 100 ℃, and when the air pressure is reduced to 3.0kPa, the boiling point T2 of liquid water can be obtained:

T ₂ ＝295 K＝22℃

the same can calculate that when the air pressure is reduced to 2.0kPa and 1.0kPa, the boiling points of the liquid water are 15.56 ℃ and 4.464 ℃ respectively. Therefore, when the cable water inlet damp wire core is subjected to drying treatment, the air pressure in the wire core can be reduced to the liquid water in the cable wire core to be boiled and evaporated at the natural temperature according to the environmental temperature of the cable, so that the water vapor in the wire core can be easily pumped out by only combining the water pumping principle, and the aim of reducing the water molecule content in the water inlet cable wire core is fulfilled.

After all the target cables are repaired, the insulation resistance and the ultralow frequency dielectric loss of each phase of the repaired target cables can be measured again, data is recorded to verify the insulation repair effect, when the parameters of the repaired target cables meet the national standard, the repair is confirmed to be completed, and if the parameters show that the repair effect is not good, the repair can be carried out again; fully discharging after the test is finished, and recovering power supply according to the operation rule; and comparing and analyzing test data of test records before and after repair, carrying out tracking test on the repaired cable under certain conditions, and observing and verifying the insulation repair effect.

It should be noted that the method can repair the XLPE cable, and realize insulation repair of the distribution cable which is seriously affected with damp or has lower insulation performance. The key for solving the problem of water inflow of the XLPE cable core is to recover the dryness of the damp cable, and the most fundamental aim is to reduce the content of moisture in the cable core. The two are combined, the overall insulation performance of the distribution cable can be improved, the applied air pressure is controlled within 0.8MPa, and injection repair through a cable middle joint can be realized.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

Through the above description of the embodiments, those skilled in the art can clearly understand that the cable repair method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

According to an embodiment of the present invention, there is also provided an apparatus for implementing the cable repair method, and fig. 5 is a block diagram of a cable repair apparatus provided according to an embodiment of the present invention, and as shown in fig. 5, the cable repair apparatus includes: a determination module 52 and an injection module 54, the apparatus of which is described below.

And the determining module 52 is configured to determine a target cable to be repaired in the target area.

And an injection module 54 connected with the determination module 52 and used for injecting the siloxane repair liquid into the target cable, wherein the siloxane repair liquid is used for repairing the insulating layer of the target cable.

It should be noted here that the determining module 52 and the injecting module 54 correspond to steps S202 to S204 in the embodiment, and the two modules are the same as the example and the application scenario realized by the corresponding steps, but are not limited to the disclosure of the embodiment. It should be noted that the above modules as a part of the apparatus may be operated in the computer terminal 10 provided in the embodiment.

An embodiment of the present invention may provide a computer device, and optionally, in this embodiment, the computer device may be located in at least one network device of a plurality of network devices of a computer network. The computer device includes a memory and a processor.

The memory may be configured to store software programs and modules, such as program instructions/modules corresponding to the cable repair method and apparatus in the embodiments of the present invention, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory, so as to implement the cable repair method. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include memory located remotely from the processor, and these remote memories may be connected to the computer terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The processor can call the information and application program stored in the memory through the transmission device to execute the following steps: determining a target cable to be repaired in a target area; and injecting a siloxane repairing liquid into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable.

Optionally, the processor may further execute the program code of the following steps: injecting a silicone repair fluid into a target cable, comprising: connecting a first port of the target cable with a first air compressor; controlling a first air compressor to inject inert gas into the target cable through the first port, wherein the inert gas is used for discharging water in the target cable core from the second port of the target cable; stopping injecting the inert gas into the target cable after the second port does not drain water outwards any more; and after the inert gas injection is stopped, injecting the siloxane repairing liquid into the target cable.

Optionally, the processor may further execute the program code of the following steps: injecting a silicone repair fluid into a target cable, comprising: controlling a first air compressor to increase the pressure in a liquid storage tank to enable the pressure in the liquid storage tank to be higher than standard atmospheric pressure and lower than a first threshold value, wherein the liquid storage tank is used for storing siloxane repairing liquid; and under the condition that the internal pressure of the liquid storage tank is higher than the standard atmospheric pressure and lower than a first threshold value, injecting the siloxane repairing liquid into the target cable.

Optionally, the processor may further execute the program code of the following steps: injecting a silicone repair fluid into a target cable, comprising: connecting the second port with a second air compressor; controlling a second air compressor to pump air from the target cable so that the pressure inside the target cable is lower than a second threshold value, wherein the boiling point of water at the pressure of the second threshold value is lower than the temperature of the environment where the target cable is located; controlling a first air compressor to introduce inert gas into the target cable core under the condition that the internal pressure of the target cable is kept lower than a second threshold value; and injecting the siloxane repair liquid into the target cable through the first port in the case that the content of the inert gas in the gas discharged from the second port is greater than a third threshold value.

Optionally, the processor may further execute the program code of the following steps: determining a target cable to be repaired in a target area, comprising: stopping power supply to the target area; measuring insulation resistance and dielectric loss of each cable in a plurality of cables in a target area; and determining the cable with the maximum damage degree in the plurality of cables as a target cable according to the insulation resistance and the dielectric loss of each cable in the plurality of cables.

Optionally, the processor may further execute the program code of the following steps: after the siloxane repairing liquid is injected into the target cable, the keeping time is longer than the preset time, so that the siloxane repairing liquid is diffused in the target cable; and in the case that the holding time exceeds the predetermined time, the power supply of the target cable is resumed.

Optionally, the processor may further execute the program code of the following steps: restoring power to the target cable, comprising: measuring the insulation resistance and the dielectric loss of the repaired target cable, and judging that the target cable is successfully repaired when the insulation resistance and the dielectric loss of the target cable meet the preset conditions; and under the condition that the target cable is successfully repaired, restoring the power supply of the target cable.

The embodiment of the invention provides a cable repair scheme. Determining a target cable to be repaired in a target area; the siloxane repairing liquid is injected into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable, and the purpose that the damaged insulating layer has the waterproof capacity again by using the siloxane repairing liquid is achieved, so that the technical effect of repairing a damp or water-entering cable is achieved, and the technical problem that no scheme for repairing the damp or water-entering cable exists in the prior art is solved.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program instructing hardware associated with the terminal device, where the program may be stored in a non-volatile storage medium, and the storage medium may include: flash disks, read-Only memories (ROMs), random Access Memories (RAMs), magnetic or optical disks, and the like.

Embodiments of the present invention also provide a non-volatile storage medium. Optionally, in this embodiment, the nonvolatile storage medium may be configured to store program codes executed by the cable repair method provided in the foregoing embodiment.

Optionally, in this embodiment, the nonvolatile storage medium may be located in any one of computer terminals in a computer terminal group in a computer network, or in any one of mobile terminals in a mobile terminal group.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining a target cable to be repaired in a target area; and injecting a siloxane repairing liquid into the target cable, wherein the siloxane repairing liquid is used for repairing the insulating layer of the target cable.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: injecting a silicone repair fluid into a target cable, comprising: connecting a first port of the target cable with a first air compressor; controlling a first air compressor to inject inert gas into the target cable through the first port, wherein the inert gas is used for discharging water in the target cable core from the second port of the target cable; stopping injecting the inert gas into the target cable after the second port does not drain water outwards any more; and after the inert gas injection is stopped, injecting the siloxane repairing liquid into the target cable.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: injecting a silicone repair fluid into a target cable, comprising: controlling a first air compressor to increase the pressure in a liquid storage tank to enable the pressure in the liquid storage tank to be higher than standard atmospheric pressure and lower than a first threshold value, wherein the liquid storage tank is used for storing siloxane repairing liquid; and under the condition that the internal pressure of the liquid storage tank is higher than the standard atmospheric pressure and lower than a first threshold value, injecting the siloxane repairing liquid into the target cable.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: injecting a silicone repair fluid into a target cable, comprising: connecting the second port with a second air compressor; controlling a second air compressor to pump air from the target cable so that the pressure inside the target cable is lower than a second threshold value, wherein the boiling point of water at the pressure of the second threshold value is lower than the temperature of the environment where the target cable is located; controlling a first air compressor to introduce inert gas into the target cable core under the condition that the internal pressure of the target cable is kept lower than a second threshold value; and injecting the siloxane remediation liquid into the target cable through the first port in the event that the content of inert gas in the gas exiting the second port is greater than a third threshold.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining a target cable to be repaired in a target area, comprising: stopping power supply to the target area; measuring insulation resistance and dielectric loss of each cable in a plurality of cables in a target area; and determining the cable with the maximum damage degree in the plurality of cables as a target cable according to the insulation resistance and the dielectric loss of each cable in the plurality of cables.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: after the siloxane repairing liquid is injected into the target cable, the keeping time is longer than the preset time, so that the siloxane repairing liquid is diffused in the target cable; and in the case that the holding time exceeds the predetermined time, the power supply of the target cable is resumed.

Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: restoring power to the target cable, comprising: measuring the insulation resistance and the dielectric loss of the repaired target cable, and judging that the target cable is successfully repaired when the insulation resistance and the dielectric loss of the target cable meet the preset conditions; and in the case that the target cable is successfully repaired, restoring the power supply of the target cable.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a non-volatile memory storage medium. Based on such understanding, the technical solution of the present invention, which is substantially or partly contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A method of repairing a cable, comprising:

determining a target cable to be repaired in a target area;

injecting a siloxane repair fluid into the target cable, wherein the siloxane repair fluid is used to repair an insulation layer of the target cable.

2. The method of claim 1, wherein injecting a silicone repair fluid into the target cable comprises:

connecting a first port of the target cable with a first air compressor;

controlling the first air compressor to inject an inert gas into the target cable through the first port, wherein the inert gas is used to drain water in the target cable core from the second port of the target cable;

stopping injecting the inert gas into the target cable after the second port no longer drains water outwardly;

and after stopping injecting the inert gas, injecting the siloxane repairing liquid into the target cable.

3. The method of claim 2, wherein injecting the silicone repair fluid into the target cable comprises:

controlling the first air compressor to increase the pressure in a liquid storage tank, so that the internal pressure of the liquid storage tank is higher than standard atmospheric pressure and lower than a first threshold value, wherein the liquid storage tank is used for storing siloxane repairing liquid;

and under the condition that the internal pressure of the liquid storage tank is higher than the standard atmospheric pressure and lower than a first threshold value, injecting the siloxane repairing liquid into the target cable.

4. The method of claim 2, wherein said injecting said silicone repair fluid into said target cable comprises:

connecting the second port with a second air compressor;

controlling the second air compressor to draw air from the target cable such that a pressure inside the target cable is below a second threshold, wherein a boiling point of water at the pressure of the second threshold is below a temperature of an environment in which the target cable is located;

controlling the first air compressor to introduce the inert gas into the target cable core under the condition of keeping the internal pressure of the target cable lower than the second threshold value;

injecting the silicone repair liquid into the target cable through the first port in the event that the inert gas content of the gas exiting the second port is greater than a third threshold.

5. The method of any one of claims 1 to 4, wherein the determining a target cable to be repaired within a target area comprises:

stopping power supply to the target area;

measuring insulation resistance and dielectric loss of each of a plurality of cables located in the target area;

and determining the cable with the maximum damage degree in the plurality of cables as the target cable according to the insulation resistance and the dielectric loss of each cable in the plurality of cables.

6. The method of claim 5, further comprising:

maintaining the silicone repair liquid for more than a predetermined time after injecting the silicone repair liquid into the target cable, so that the silicone repair liquid diffuses in the target cable;

and restoring the power supply of the target cable when the holding time exceeds a preset time.

7. The method of claim 6, wherein the restoring power to the target cable comprises:

measuring the insulation resistance and the dielectric loss of the repaired target cable, and judging that the target cable is successfully repaired when the insulation resistance and the dielectric loss of the target cable meet preset conditions;

and recovering the power supply of the target cable under the condition that the target cable is successfully repaired.

8. A cable repair device, comprising:

the determining module is used for determining a target cable to be repaired in a target area;

and the injection module is used for injecting a siloxane repair liquid into the target cable, wherein the siloxane repair liquid is used for repairing the insulating layer of the target cable.

9. A non-volatile storage medium, comprising a stored program, wherein the program, when executed, controls a device in which the non-volatile storage medium is located to perform the cable repair method according to any one of claims 1 to 7.

10. A computer device, comprising: a memory and a processor, wherein the processor is capable of,

the memory stores a computer program;

the processor configured to execute a computer program stored in the memory, the computer program when executed causing the processor to perform the cable repair method of any one of claims 1 to 6.

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