CN112134245A - Underground cable leakage protection early warning device and using method - Google Patents
Underground cable leakage protection early warning device and using method Download PDFInfo
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- CN112134245A CN112134245A CN202010913922.7A CN202010913922A CN112134245A CN 112134245 A CN112134245 A CN 112134245A CN 202010913922 A CN202010913922 A CN 202010913922A CN 112134245 A CN112134245 A CN 112134245A
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 23
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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
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
-
- 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
- H02G15/003—Filling materials, e.g. solid or fluid insulation
-
- 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
- H02G15/013—Sealing means for cable inlets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses an underground cable leakage protection early warning device and a using method thereof, belonging to the field of cables, the scheme adsorbs ferroferric oxide particles and insulating glue in a storage tank through a magnetic field generated by current leakage, so that the ferroferric oxide particles and the insulating glue enter the connecting ring through the connecting pipe and are adhered to the surface of the cable, the damaged part of the cable is blocked, the soil layer at the upper end of the embedded pipeline is dug, the colors of the conductive fiber tube and the thermotropic liquid crystal are observed through the outer side of the safety early warning layer to judge whether the outer end of the cable is damaged to cause current leakage or not, the damage position of the cable is distinguished through color, the damage to personnel caused by current leakage is reduced, the sealing ring expands and is attached to the outer wall of the cable to seal the inner space of the fixing ring when carbon dioxide gas is heated, the insulating glue is quickly cured through high temperature, current leakage is reduced, and therefore damage of current to maintenance personnel is reduced.
Description
Technical Field
The invention relates to the field of cables, in particular to an underground cable leakage protection early warning device and a using method thereof.
Background
The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and transmission lines under river-crossing seawater, is gradually increased in proportion in the power line, is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and comprises various insulated power cables with voltage grades of 1-500KV and above.
The use of power cables has been in history for centuries up to now, 1879, us inventor t.a. edison wrapped jute around a copper rod and penetrated it into an iron pipe, and then filled with an asphalt mixture to make a cable, he laid this cable in new york, started underground transmission, the next year, british karnland de invented an asphalt impregnated paper insulated power cable, 1889, british s s.z. fran ladder laid 10 kv oil impregnated paper insulated cables between london and de ford, 1908, uk built a 20 kv cable network, electric cables were used more and more widely, in 1911, german laid 60 kv high voltage cables, started the development of high voltage cables, in 1913, german houshisha developed split phase shielded cables, improved the electric field distribution inside cables, eliminated the tangential stress of the insulated surface, became a monument in the power cables, 1952 years, sweden laid 380 kv cables in the north, the application of the ultrahigh voltage cable is realized, and 1100 kV and 1200 kV ultrahigh voltage power cables are manufactured in the 80 s.
When electric power breaks in the underground and causes current leakage, the broken periphery of the cable has current passing through, maintenance personnel cannot be close to the maintenance position, and the current diffusion range is not convenient to observe during maintenance, so that certain maintenance difficulty is caused.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide an underground cable leakage protection early warning device, the scheme is that ferroferric oxide particles and insulating glue in a storage tank are adsorbed by a magnetic field generated by current leakage, so that the ferroferric oxide particles and the insulating glue enter the inside of a connecting ring through a connecting pipe and are adhered to the surface of a cable to block the damaged part of the cable, a soil layer at the upper end of an embedded pipeline is dug, the colors of a conductive fiber pipe and thermotropic liquid crystal are observed through the outer side of a safety early warning layer to judge whether the outer end of the cable is damaged or not to cause current leakage, the damaged position of the cable is distinguished through the color to reduce the injury of current leakage to personnel, carbon dioxide gas is heated to ensure that a sealing ring expands and is attached to the outer wall of the cable to seal the inner space of a fixing ring, the, thereby reducing the damage of the current to maintenance personnel.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
An underground cable leakage protection early warning device comprises a pre-buried pipeline, wherein a cable is arranged in the pre-buried pipeline, a pair of fixing rings is slidably connected between the inner walls of the pre-buried pipeline, a plurality of uniformly distributed connecting rods are fixedly connected between the pair of fixing rings, the outer side of each connecting rod is wrapped by a connecting ring, a plurality of uniformly distributed limiting grooves are formed in the outer ends of the fixing rings, limiting blocks are fixedly connected in the limiting grooves, the outer ends of the limiting blocks are in contact with the inner walls of the pre-buried pipeline, storage grooves are formed in the fixing rings, ferroferric oxide particles and insulating cement are filled in the storage grooves, through holes are formed in the ends, close to each other, of the connecting rods, are communicated with the storage grooves through the connecting rods, connecting pipes are fixedly connected between the inner walls of the through holes, and LDPE films and the limiting rings are fixedly connected between the inner walls of, a mandril is inserted between the inner walls of the limit rings, the mandril is positioned at the right side of the LDPE film, the outer end of the cable is fixedly connected with an electric leakage detection device, when the cable is broken underground and leaks electricity, current passes through the periphery of the broken part of the cable within a certain range, and a dangerous area is generated, the ferroferric oxide particles and the insulating glue in the storage tank are adsorbed by a magnetic field generated by current leakage, the LDPE film at the left end of the ejector rod breaks through the LDPE film by the extrusion of the ferroferric oxide particles and the insulating glue, make ferroferric oxide granule and insulating cement pass through the inside and the adhesion of connecting pipe entering go-between on the surface of cable, the high temperature that the electric current was revealed and is produced reacts and evaporate the inside water of go-between, reduces inside water and causes the secondary damage to the cable, and the high temperature is with the insulating cement solidification, improves the cohesiveness, blocks up cable damage department, reduces the electric current and reveals.
Further, the electric leakage detection device comprises a conductive layer, the inner wall of the conductive layer is fixedly connected with the outer end of the fixing ring, the outer end of the conductive layer is fixedly connected with a plurality of uniformly distributed conductive fiber tubes, the conductive fiber tubes penetrate through one end of the connecting ring and are fixedly connected with color display balls, the color display balls are positioned on the outer side of the connecting ring and are communicated with the conductive fiber tubes, thermotropic liquid crystals are filled in the color display balls and the conductive fiber tubes, a safety early warning layer is arranged on the outer side of the conductive layer, when a damaged part of the cable is overhauled, a soil layer at the upper end of the embedded pipeline needs to be dug, whether the outer end of the cable is damaged or not to cause current leakage is judged by observing the colors of the conductive fiber tubes and the thermotropic liquid crystals outside the safety early warning layer, the damaged position of the cable is, the secondary damage to the cable is greatly reduced by observing the position of the safety early warning layer, the protection measures are improved, and the current leakage is reduced to cause harm to personnel.
Further, the inner wall of solid fixed ring is excavated there is the mounting groove, fixedly connected with sealing washer between the mounting groove inner wall, the inner wall of sealing washer contacts with the outside of cable, the inside excavation of sealing washer has gaseous storage bag, the inside packing of gaseous storage bag has carbon dioxide gas, and electric current makes the inside zone temperature of buried pipeline in advance rise, and carbon dioxide gas is heated and makes the sealing washer inflation and laminate in the solid fixed ring inner space of outer wall seal of cable, reduces groundwater and gets into solid fixed ring's inside, is convenient for through high temperature to the insulating cement fast curing, reduces the electric current and reveals to reduce the injury of electric current to maintenance personal.
Furthermore, the connecting ring is made of rubber, and the inner wall of the connecting ring is filled with plastic particles, so that the toughness of the connecting ring is improved, the connecting ring is not easy to corrode, and the service life of the connecting ring is prolonged.
Further, the transversal circular shape of personally submitting of stopper, and the outer end of stopper is dug and is had the antiskid line, the outer end of stopper and the inner wall phase-match of cable for solid fixed ring is difficult for rocking in buried pipeline's inside, improves the intra-annular leakproofness of solid fixed ring.
Furthermore, one end of the ejector rod close to the LDPE film is fixedly connected with a plurality of ejector pins which are uniformly distributed, so that the ejector rod can burst the LDPE film quickly, and the leakage of the current is reduced to cause secondary damage even if the damaged part of the outer end of the cable is repaired and separated.
Further, the inside of ejector pin is excavated and is deposited the chamber, the inside packing of depositing the chamber has allochroic silica gel, deposit fixedly connected with edible gelatin between the intracavity wall, edible gelatin is located the right side of ejector pin, adsorbs the water of cable outer end through allochroic silica gel, improves the degree of drying in the cable outside to reduce the cable and cause high temperature short circuit phenomenon because of the electric current is revealed.
A use method of an underground cable leakage protection early warning device comprises the following steps:
s1, adsorbing the ferroferric oxide particles and the insulating glue in the storage tank by a magnetic field generated by current leakage, so that the ferroferric oxide particles and the insulating glue enter the connecting ring through the connecting pipe and are adhered to the surface of the cable to block the damaged part of the cable;
s2, excavating a soil layer at the upper end of the embedded pipeline, observing the colors of the conductive fiber tube and the thermotropic liquid crystal through the outer side of the safety early warning layer to judge whether current leakage is caused by damage of the outer end of the cable or not, and distinguishing the damage position of the cable through the color to reduce the harm of the current leakage to personnel;
s3, carbon dioxide gas is heated to make the sealing ring expand and fit in the inner space of the outer wall sealing and fixing ring of the cable, the insulating glue is rapidly solidified through high temperature, current leakage is reduced, and therefore the damage of current to maintenance personnel is reduced.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is revealed the magnetic field that produces through the electric current and is adsorbed the inside ferroferric oxide granule and the insulating cement of storage tank, make ferroferric oxide granule and insulating cement pass through the inside and the adhesion at the surface of cable of connecting pipe entering go-between, block up cable damage department, dig the soil layer of pre-buried pipeline upper end, whether the colour of observing conductive fiber pipe and thermotropic liquid crystal through the outside on safety precaution layer differentiates the cable outer end and has the damage to lead to the electric current to reveal, distinguish the damage position of cable through the colour, reduce the electric current and reveal and cause the injury to the personnel, carbon dioxide gas is heated and makes the sealing washer inflation and laminate in the outer wall seal of cable solid fixed ring inner space, be convenient for through high temperature to the insulating cement fast curing, reduce the electric current and reveal.
(2) The electric leakage detection device comprises a conductive layer, the inner wall of the conductive layer is fixedly connected with the outer end of a fixing ring, the outer end of the conductive layer is fixedly connected with a plurality of uniformly distributed conductive fiber tubes, the conductive fiber tubes penetrate through one end of the connecting ring and are fixedly connected with a color display ball, the color display ball is positioned outside the connecting ring and is communicated with the conductive fiber tubes, thermotropic liquid crystals are filled in the color display ball and the conductive fiber tubes, a safety early warning layer is arranged outside the conductive layer, when a damaged part of the cable is overhauled, a soil layer at the upper end of an embedded pipeline needs to be dug out, whether current leakage is caused by damage of the outer end of the cable or not is distinguished by observing the colors of the conductive fiber tubes and the thermotropic liquid crystals outside the safety early warning layer, the damaged position of the cable is conveniently distinguished through the color change of the thermotropic, the protection measures are improved, and the harm to personnel caused by current leakage is reduced.
(3) The inner wall of solid fixed ring is excavated there is the mounting groove, fixedly connected with sealing washer between the mounting groove inner wall, the inner wall of sealing washer contacts with the outside of cable, the inside excavation of sealing washer has gaseous storage bag, the inside packing of gaseous storage bag has carbon dioxide gas, electric current makes the inside regional temperature rise of buried pipeline in advance, carbon dioxide gas is heated and makes the sealing washer inflation and laminate in the solid fixed ring inner space of outer wall seal of cable, reduce the inside that groundwater got into solid fixed ring, be convenient for through high temperature to the insulating cement fast curing, reduce the electric current and reveal, thereby reduce the injury of electric current to maintenance personal.
(4) The connecting ring is made of rubber, and the inner wall of the connecting ring is filled with plastic particles, so that the toughness of the connecting ring is improved, the connecting ring is not easy to corrode, and the service life of the connecting ring is prolonged.
(5) The transversal circular shape of personally submitting of stopper, and the outer end of stopper is opened the chisel and is had the antiskid line, the outer end of stopper and the inner wall phase-match of cable for solid fixed ring is difficult for rocking in buried pipeline's inside in advance, improves the intra-annular leakproofness of solid fixed ring.
(6) One end of the ejector rod close to the LDPE film is fixedly connected with a plurality of ejector pins which are uniformly distributed, so that the ejector rod can burst the LDPE film quickly, and the leakage of the current is reduced to cause secondary damage even if the damaged part of the outer end of the cable is repaired and separated.
(7) The inside of ejector pin is dug and is had the chamber of depositing, and the inside packing of depositing the chamber has allochroic silica gel, deposits fixedly connected with edible gelatin between the intracavity wall, and edible gelatin is located the right side of ejector pin, adsorbs the water of cable outer end through allochroic silica gel, improves the degree of drying in the cable outside to reduce the cable and cause high temperature short circuit phenomenon because of the electric current is revealed.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic perspective view of a retaining ring according to the present invention;
FIG. 4 is a schematic perspective view of a connecting rod according to the present invention;
FIG. 5 is a schematic side view of a cross-sectional structure of the retaining ring of the present invention;
FIG. 6 is a schematic view of the cross-sectional front view of the connecting rod of the present invention;
FIG. 7 is a schematic structural view of a top rod of the present invention in front elevation and section;
FIG. 8 is a schematic diagram of a conductive layer of the present invention.
The reference numbers in the figures illustrate:
the safety early warning device comprises a pre-buried pipeline 1, a cable 2, a fixing ring 3, a connecting ring 4, a sealing ring 5, a connecting rod 6, a limiting groove 7, a limiting block 8, a storage groove 9, ferroferric oxide particles 10, insulating glue 11, a connecting pipe 12, an LDPE film 13, an ejector rod 14, a limiting ring 15, a conducting layer 16, a conducting fiber pipe 17, a color display ball 18 and a safety early warning layer 19.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-6, an underground cable leakage protection early warning device comprises an embedded pipeline 1, a cable 2 is arranged inside the embedded pipeline 1, a pair of fixing rings 3 is slidably connected between the inner walls of the embedded pipeline 1, a plurality of uniformly distributed connecting rods 6 are fixedly connected between the fixing rings 3, a connecting ring 4 wraps the outer side of each connecting rod 6, a plurality of uniformly distributed limiting grooves 7 are formed in the outer ends of the fixing rings 3, limiting blocks 8 are fixedly connected inside the limiting grooves 7, the outer ends of the limiting blocks 8 are in contact with the inner walls of the embedded pipeline 1, a storage groove 9 is formed in the fixing rings 3, ferroferric oxide particles 10 and insulating glue 11 are filled in the storage groove 9, the ferroferric oxide particles 10 are magnetic and do not have electric conductivity, through holes are formed in the ends, close to each other, of the connecting rods 6 and are communicated with the storage groove 9 through the connecting rods 6, a connecting pipe 12 is fixedly connected between the inner walls of the through holes, an LDPE film 13 and a limiting ring 15 are fixedly connected between the inner walls of the connecting pipe 12, an ejector rod 14 is inserted between the inner walls of the limiting ring 15, the ejector rod 14 is positioned on the right side of the LDPE film 13, an electric leakage detection device is fixedly connected to the outer end of the cable 2, when the cable 2 is broken underground and leaks electricity, current passes through the periphery of the broken part of the cable 2 within a certain range, a dangerous area is generated, a magnetic field generated by current leakage adsorbs ferroferric oxide particles 10 and insulating glue 11 in the storage tank 9, the LDPE film 13 at the left end of the ejector rod 14 breaks the LDPE film 13 through extrusion of the ferroferric oxide particles 10 and the insulating glue 11, the ferroferric oxide particles 10 and the insulating glue 11 enter the connecting pipe 4 through the connecting pipe 12 and adhere to the surface of the cable 2, and high temperature generated by current leakage reacts with water in the connecting ring, reduce inside water and cause the secondary damage to cable 2, high temperature improves the cohesiveness with the 11 solidification of insulating cement, blocks up cable 2 damaged department, reduces the current leakage.
Referring to fig. 8, the electric leakage detecting apparatus includes a conductive layer 16, an inner wall of the conductive layer 16 is fixedly connected to an outer end of the fixing ring 3, the outer end of the conductive layer 16 is fixedly connected to a plurality of conductive fiber tubes 17 which are uniformly distributed, the conductive fiber tubes 17 penetrate through one end of the connecting ring 4 and are fixedly connected to a color display ball 18, the color display ball 18 is located outside the connecting ring 4, the color display ball 18 is communicated with the conductive fiber tubes 17, the color display ball 18 and the conductive fiber tubes 17 are filled with thermotropic liquid crystals 18, a safety pre-warning layer 19 is disposed outside the conductive layer 16, when a damaged portion of the cable 2 is repaired, a soil layer at an upper end of the pre-buried pipeline 1 needs to be excavated, whether current leakage occurs at the outer end of the cable 2 due to damage is determined by observing colors of the conductive fiber tubes 17 and the thermotropic liquid crystals 18 outside the safety pre, maintenance is convenient, secondary damage to the cable 2 is greatly reduced by observing the position of the safety early warning layer 19, protective measures are improved, and current leakage is reduced to cause harm to personnel.
Please refer to fig. 1-4, the inner wall of the fixing ring 3 is chiseled with a mounting groove, a sealing ring 5 is fixedly connected between the inner walls of the mounting grooves, the inner wall of the sealing ring 5 contacts with the outer side of the cable 2, a gas storage bag is chiseled inside the sealing ring 5, the gas storage bag is filled with carbon dioxide gas, the temperature of the inner area of the embedded pipeline 1 is raised by current, the carbon dioxide gas is heated to expand the sealing ring 5 and is attached to the outer wall of the cable 2 to seal the inner space of the fixing ring 3, the phenomenon that groundwater enters the fixing ring 3 is reduced, the insulation glue 11 is rapidly solidified through high temperature is facilitated, the leakage of current is reduced.
Please refer to fig. 2 and 4, the connection ring 4 is made of rubber, the inner wall of the connection ring 4 is filled with plastic particles, the toughness of the connection ring 4 is improved, and the connection ring 4 is not easy to corrode, so that the service life of the connection ring 4 is prolonged, the cross section of the limiting block 8 is circular, anti-skid lines are chiseled at the outer end of the limiting block 8, the outer end of the limiting block 8 is matched with the inner wall of the cable 2, the fixing ring 3 is not easy to shake in the embedded pipeline 1, and the sealing performance in the fixing ring 3 is improved.
Referring to fig. 6-7, one end of the ejector rod 14 close to the LDPE film 13 is fixedly connected with a plurality of ejector pins which are uniformly distributed, so that the ejector rod 14 can burst the LDPE film 13 quickly, even if the damaged part of the outer end of the cable 2 is repaired and cut off, secondary damage caused by leakage of current is reduced, a storage cavity is formed in the ejector rod 14, allochroic silica gel is filled in the storage cavity, edible gelatin is fixedly connected between the inner walls of the storage cavity and is located on the right side of the ejector rod 14, water at the outer end of the cable 2 is adsorbed by the allochroic silica gel, the drying degree of the outer side of the cable 2 is improved, and the phenomenon that the cable 2 is short-.
A use method of an underground cable leakage protection early warning device comprises the following steps:
s1, adsorbing the ferroferric oxide particles 10 and the insulating glue 11 in the storage tank 9 by a magnetic field generated by current leakage, so that the ferroferric oxide particles 10 and the insulating glue 11 enter the connecting ring 4 through the connecting pipe 12 and adhere to the surface of the cable 2 to block the damaged part of the cable 2;
s2, excavating a soil layer at the upper end of the embedded pipeline 1, observing the colors of the conductive fiber tube 17 and the thermotropic liquid crystal 18 through the outer side of the safety early warning layer 19 to judge whether current leakage is caused by damage at the outer end of the cable 2 or not, and distinguishing the damage position of the cable 2 through the color to reduce the harm of the current leakage to personnel;
s3, carbon dioxide gas is heated to make sealing washer 5 expand and laminate in the outer wall sealing fixed ring 3 inner space of cable 2, is convenient for through high temperature to insulating cement 11 fast curing, reduces the electric current and reveals to reduce the injury of electric current to maintenance personal.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (8)
1. The utility model provides an underground cable earth leakage protection early warning device, includes buried pipeline (1), the inside of buried pipeline (1) is equipped with cable (2), its characterized in that: the connecting device is characterized in that a pair of fixing rings (3) is connected between the inner walls of the pre-buried pipelines (1) in a sliding mode, a plurality of evenly distributed connecting rods (6) are fixedly connected between the fixing rings (3), the outer sides of the connecting rods (6) are wrapped by connecting rings (4), the outer ends of the fixing rings (3) are provided with a plurality of evenly distributed limiting grooves (7), the inner parts of the limiting grooves (7) are fixedly connected with limiting blocks (8), the outer ends of the limiting blocks (8) are in contact with the inner walls of the pre-buried pipelines (1), the inner parts of the fixing rings (3) are provided with storage grooves (9), the storage grooves (9) are filled with ferroferric oxide particles (10) and insulating glue (11), a plurality of connecting rods (6) are arranged at one end close to each other in a chiseling mode to form through holes, the through holes are communicated with the storage grooves (9) through the connecting rods (6, fixedly connected with LDPE film (13) and spacing ring (15) between the inner wall of connecting pipe (12), it is equipped with ejector pin (14) to insert between the inner wall of spacing ring (15), ejector pin (14) are located the right side of LDPE film (13), the outer end fixedly connected with electric leakage detection device of cable (2).
2. An underground cable earth leakage protection early warning device according to claim 1, characterized in that: the electric leakage detection device comprises a conductive layer (16), the inner wall of the conductive layer (16) is fixedly connected with the outer end of a fixing ring (3), the outer end of the conductive layer (16) is fixedly connected with a plurality of uniformly distributed conductive fiber tubes (17), the conductive fiber tubes (17) penetrate through one end of the connecting ring (4) and are fixedly connected with color display balls (18), the color display balls (18) are located on the outer side of the connecting ring (4), the color display balls (18) are communicated with the conductive fiber tubes (17), thermotropic liquid crystals are filled in the color display balls (18) and the conductive fiber tubes (17), and a safety early warning layer (19) is arranged on the outer side of the conductive layer (16).
3. An underground cable earth leakage protection early warning device according to claim 1, characterized in that: the inner wall of solid fixed ring (3) is opened and is chiseled there is the mounting groove, fixedly connected with sealing washer (5) between the mounting groove inner wall, the inner wall of sealing washer (5) contacts with the outside of cable (2), the inside of sealing washer (5) is opened and is chiseled there is gaseous storage bag, the inside packing of gaseous storage bag has carbon dioxide gas.
4. An underground cable earth leakage protection early warning device according to claim 1, characterized in that: the connecting ring (4) is made of rubber, and plastic particles are filled in the inner wall of the connecting ring (4).
5. An underground cable earth leakage protection early warning device according to claim 1, characterized in that: the transversal circular shape of personally submitting of stopper (8), and the outer end of stopper (8) is opened and is dug there is the antiskid line, the outer end of stopper (8) and the inner wall phase-match of cable (2).
6. An underground cable earth leakage protection early warning device according to claim 1, characterized in that: one end of the ejector rod (14) close to the LDPE film (13) is fixedly connected with a plurality of ejector pins which are uniformly distributed.
7. An underground cable earth leakage protection early warning device according to claim 1, characterized in that: the inside of ejector pin (14) is opened chisel and is had the chamber of depositing, the inside of depositing the chamber is filled there is allochroic silica gel, deposit fixedly connected with edible gelatin between the intracavity wall, edible gelatin is located the right side of ejector pin (14).
8. An underground cable earth leakage protection early warning device according to any one of claims 1-7, characterized in that: the using method comprises the following steps:
s1, adsorbing the ferroferric oxide particles (10) and the insulating glue (11) in the storage tank (9) by a magnetic field generated by current leakage, so that the ferroferric oxide particles (10) and the insulating glue (11) enter the connecting ring (4) through the connecting pipe (12) and are adhered to the surface of the cable (2), and blocking the damaged part of the cable (2);
s2, excavating a soil layer at the upper end of the embedded pipeline (1), observing the colors of the conductive fiber tube (17) and the thermotropic liquid crystal through the outer side of the safety early warning layer (19) to judge whether current leakage is caused by damage at the outer end of the cable (2), and distinguishing the damage position of the cable (2) through the color to reduce the harm of the current leakage to personnel;
s3, carbon dioxide gas is heated to make sealing washer (5) expand and laminate in the outer wall seal of cable (2) solid fixed ring (3) inner space, is convenient for through high temperature to insulating cement (11) fast curing, reduces the electric current and reveals to reduce the injury of electric current to maintenance personal.
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| CN113483275A (en) * | 2021-09-08 | 2021-10-08 | 南通英富泰电气科技有限公司 | Exhaust emission pipeline for petroleum smelting |
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| CN113871091A (en) * | 2021-09-28 | 2021-12-31 | 胡守盛 | Durable communication cable |
| CN114966468A (en) * | 2022-05-24 | 2022-08-30 | 国网江苏省电力有限公司盐城供电分公司 | Automatic intelligent safety detection equipment for circuit maintenance |
| CN115508965A (en) * | 2022-10-09 | 2022-12-23 | 黄祥仁 | Direct-buried optical cable with early warning reminding structure |
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Effective date of registration: 20210907 Address after: 526060 No.88 Xin'an Road, 77 Duanzhou District, Zhaoqing City, Guangdong Province Applicant after: GUANGDONG POWER GRID Co.,Ltd. ZHAOQING POWER SUPPLY BUREAU Address before: 113000 No.15 Fudong 1st Road, Dongzhou District, Fushun City, Liaoning Province Applicant before: Wang Shengdong |
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