CN114049989A - Cross-linked polyethylene insulated water-blocking power cable - Google Patents
Cross-linked polyethylene insulated water-blocking power cable Download PDFInfo
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- CN114049989A CN114049989A CN202111291230.4A CN202111291230A CN114049989A CN 114049989 A CN114049989 A CN 114049989A CN 202111291230 A CN202111291230 A CN 202111291230A CN 114049989 A CN114049989 A CN 114049989A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/14—Submarine cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
- H01B7/328—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising violation sensing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention belongs to the technical field of power cables, and particularly relates to a crosslinked polyethylene insulating water-blocking power cable which comprises a cable, a main guide core, an insulating layer, a filling layer and an isolating layer; the cable is formed by combining a plurality of main guide cores; insulating layers are sleeved on the periphery of the surface of the main guide core; an outer sheath is sleeved on the surface of the isolation layer; the inner diameter of the outer sheath is larger than the outer diameter of the isolation layer; a space between the isolation layer and the outer sheath is filled with filling master batch and floating balls; the floating ball which is uniformly arranged is filled in the gap between the isolation layer and the outer sheath, the floating ball flows out along the damaged part of the outer sheath and floats to the water surface of a river to remind maintenance personnel of warning cables, so that the damaged part of the outer sheath can be maintained in time, the problem that the cable maintenance personnel can not find the damaged part of the cable in time is effectively solved, and the damaged part of the cable can not be repaired in time.
Description
Technical Field
The invention belongs to the technical field of power cables, and particularly relates to a crosslinked polyethylene insulating water-blocking power cable.
Background
The crosslinked polyethylene insulated cable is produced by chemical or physical process to convert the insulating polyethylene molecule from linear molecular structure to main netted molecular structure, i.e. thermoplastic polyethylene is converted to thermosetting crosslinked polyethylene, so that it has greatly raised heat resistance and mechanical performance, reduced shrinkage, no melting after being heated and excellent electric performance maintained.
In recent years, the importance of water resistance is becoming more and more appreciated for cables laid in harsh and humid environments, particularly in regions with high ground water levels or rainy weather throughout the year (such as the south of the Yangtze river in China). At present, most of power cables are directly buried in soil, when a river reservoir directly places the cables at the bottom of a river, the cables placed at the bottom of the river bear the impact of water flow, particularly when flood outbreak occurs, the water flow in the river has high flow speed and can drive glass fragments or metal sheets and sharp gravels in the river to flow and impact the surface of the cables, so that the outer sheaths of the cables are damaged, and potential safety hazards exist in the use process of the cables, a cross-linked polyethylene insulation water-blocking power cable also appears in the prior art, for example, a Chinese patent with the application number of CN202010363527.6, the technical scheme discloses a cross-linked polyethylene insulation water-blocking power cable which comprises a plurality of leads, insulating layers are fixed on the outer parts of the leads, an anti-extrusion mechanism is arranged inside the insulating layers, buffer layers are fixed on the outer parts of the insulating layers, shielding layers are fixed on the outer parts of the buffer layers, an anti-corrosion layer is fixedly arranged outside the shielding layer, a waterproof layer is fixedly arranged outside the anti-corrosion layer, and a flame-retardant layer is fixedly arranged outside the waterproof layer; the wire comprises main guide core, assistance core and protective sheath, and assistance core is to encircle evenly distributed and sets up on the outer wall of main guide core, and a plurality of assistance cores are the heliciform winding and set up on the outer wall of main guide core.
This technical scheme has improved power cable's performance, has prolonged power cable's life, is favorable to adverse circumstances's electric power to be laid. But when the cable that this technical scheme designed appears damaged, the damaged department of the unable timely discovery cable of maintainer, especially appear damaged in the cable of river bottom, lead to the damaged department of cable can't be timely restoreed, do not restore damaged department for a long time, cause the steam in the river to invade to cable inside along damaged department, in steam gets into the cable, must lead to the water branch type to climb, influence electrically conductive quality, cause the electrical property decline of cable, seriously shorten the life-span of cable.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that cable maintenance personnel cannot find the damaged part of the cable in time, the damaged part of the cable cannot be repaired in time, and water enters the cable along the damaged part of the cable, the invention provides the crosslinked polyethylene insulation water-blocking power cable.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a crosslinked polyethylene insulated waterproof power cable, which comprises a cable; the cable comprises a main guide core, an insulating layer, a filling layer and an isolating layer; insulating layers are sleeved on the periphery of the surface of the main guide core; the insulating layer is made of waterproof rubber materials; the surface of the insulating layer is sleeved with an isolating layer; an outer sheath is sleeved on the surface of the isolation layer; the inner diameter of the outer sheath is larger than the outer diameter of the isolation layer; the space between the isolation layer and the outer sheath is a filling layer; granular filling materials and floating balls are filled in the space in the filling layer;
when the cable works, the insulating layer is sleeved on the outer surface of the main guide core, the insulating layer electrically isolates the main guide core from the ground and the main guide cores of different phases, so that the insulating layer protects the main guide core and ensures the electric energy transmission in the main guide core, the insulating layer is sleeved on the outer surface of the insulating layer and fully wraps and integrates the plurality of main guide cores to form a second protective layer of the main guide core, so that the main guide core is prevented from being damaged by the contact of external substances, a gap is reserved between the insulating layer and the outer sheath because the outer diameter of the insulating layer is smaller than the inner diameter of the outer sheath, a filler is filled in the gap between the insulating layer and the outer sheath, the filler is made of concentrated plastic particles, the roundness of the cable 1 is enhanced, when the cable is placed at the bottom of a river for a long time, and when the water flow speed in the river is high, glass fragments or metal sheets in the river can be driven, When the outer sheath is damaged, the filling material can also prevent water in the river from entering the filling inner space along the damaged part of the outer sheath, so that the water entering along the damaged part of the outer sheath is reduced from permeating to the length direction of the cable, and the uniformly arranged floating balls are filled in the clearance between the isolation layer and the outer sheath, when the damaged area of the outer sheath is larger than the diameter of the floating balls, the floating balls can flow out along the damaged part of the outer sheath and float to the water surface of the river, the warning cable is used for reminding maintenance personnel of the warning cable, so that the damaged part of the outer sheath can be maintained and treated in time, and when the damaged area of the outer sheath is smaller than the diameter of the floating ball, the floating ball can also stop the damaged part to reduce the loss of the filler, so that the service life of the cable is prolonged.
Preferably, the bottom of the floating ball is fixedly connected with a silk thread; one end of the silk thread far away from the floating ball is fixedly connected with an elastic membrane; the elastic film is fixedly connected with the outer surface of the isolation layer and is positioned in the inner space of the filling layer; during operation, for further reducing the time that cable maintainer seeks the damaged department of cable oversheath, through the bottom fixedly connected with silk thread at the floater, make the floating scope of silk thread constraint floater, cable maintainer is when the maintenance cable, seek the position of floater, just can lock the damaged position of oversheath fast along the silk thread that prolongs the floater bottom, thereby can be timely maintain the outer sheath, when the floater flows along the damaged department of oversheath, the floater drives the silk thread and upwards moves above the water surface, through keeping away from floater one end fixedly connected with elastic membrane at the silk thread, make the tensile elastic membrane of silk thread, make the damaged department of elastic membrane shutoff oversheath, reduce the water source in the river and enter into the space between isolation layer and the oversheath along the damaged department of oversheath.
Preferably, micropores are formed at the joints of the elastic membrane and the silk threads; a water-blocking yarn layer is fixedly connected between the elastic film and the isolation layer; the inner surface of the water-blocking yarn layer is fixedly connected to the outer surface of the isolation layer; when the cable waterproof yarn works, micropores are formed at the joints of the elastic membrane and the silk yarns, the silk yarns pull the elastic membrane to block the damaged parts, so that water in a river enters the space between the elastic membrane and the isolating layer along the micropores, the waterproof yarn layer is contacted with the surface of one end, far away from the silk yarns, of the elastic membrane and enters the space in the elastic membrane to be contacted with the waterproof yarn layer, the waterproof function of the cable waterproof yarn is that when the waterproof yarn fiber main body is in contact with water, the waterproof yarn fiber main body can be rapidly expanded to form jelly with a large volume, the jelly has quite strong water retention capacity, so that the moisture is prevented from continuously permeating and diffusing, the purpose of water blocking is achieved, the elastic membrane is driven to synchronously expand after the waterproof yarn layer is expanded, the elastic membrane can be fully attached to the damaged parts of the filling layer to form a protective layer, the water in the river is prevented from entering the space in the filling layer along the damaged parts, and the water can be prevented from spreading along the length direction of the outer sheath in the space in the filling layer, effectively avoiding the generation of water tree branch phenomenon.
Preferably, the separation layer is fixedly connected between the separation layer and the outer sheath and is uniformly arranged; the separation layer is in a vertical separation plate shape, and the length direction of the separation layer is the same as that of the cable; the bottom of the separation layer is vertically connected with the outer surface of the isolation layer, and the top of the separation layer is vertically connected with the inner surface of the outer sheath; during operation, the separate layer of evenly arranging of fixedly connected with between isolation layer and oversheath through the separate layer with even the being divided into a plurality of intervals of floater, stopping and elastic membrane, no matter which section's oversheath surface appears the damage this moment, water in the river can only follow and enter into the interval that corresponds with damaged department, can effectually prevent to enter into the water infiltration of oversheath inner space to other intervals.
Preferably, the outer surface of the floating ball is coated with fluorescent paint; the during operation, when the damaged department of urgent maintenance cable at night, through having scribbled fluorescent paint on the surface of floater for the floater can give off the radiance at night, and the maintenance personal just can be quick seeks and finds the damaged position of cable according to the radiance that the floater gives off, thereby the maintenance personal can be timely the maintenance of the damaged department of completion cable.
Preferably, uniformly arranged hemp ropes are fixedly connected in a space between the isolation layer and the insulation layer; the during operation, through the hemp rope that the space fixedly connected with between isolation layer and insulating layer evenly set up, the hemp rope has fire behaviour through fire retardant treatment, can effectively fill the gap of cable inner space, can also strengthen the tensile strength of cable simultaneously to and the pliability of reinforcing cable, improve the structural strength of cable.
The invention has the following beneficial effects:
1. the invention relates to a cross-linked polyethylene insulation water-blocking power cable, which is characterized in that a floating ball is arranged, when the water flow in a river is high in speed, glass fragments or metal sheets and sharp gravels in the river can be driven to flow and impact the surface of the cable, so that the protective layer of the cable is damaged, and potential safety hazards exist in the use process of the cable, because the cable is positioned at the bottom of the river, a maintainer cannot quickly find the damaged part of the cable to timely maintain the damaged part of the cable, when the damaged area of an outer sheath is larger than the diameter of the floating ball, the floating ball flows out along the damaged part of the outer sheath and floats to the water surface of the river, the floating ball is used for reminding the maintainer of the cable to enable the damaged part to be timely maintained and treated, and when the damaged area of the outer sheath is smaller than the diameter of the floating ball, the floating ball can also prevent the damaged part from losing filler, thereby prolonging the service life of the cable.
2. According to the cross-linked polyethylene insulation water-blocking power cable, the floating ball, the silk thread and the elastic membrane are arranged, the silk thread is fixedly connected to the bottom of the floating ball, so that the silk thread is bound to the floating range of the floating ball, when a cable maintainer maintains the cable, the position of the floating ball is directly observed and directly searched, the broken position of the outer sheath can be quickly found by the silk thread which is arranged at the bottom of the floating ball, the outer sheath can be timely maintained, when the floating ball flows out along the broken position of the outer sheath, the floating ball drives the silk thread to move upwards above the water surface, the elastic membrane is fixedly connected to one end, far away from the floating ball, of the silk thread, the elastic membrane is stretched by the silk thread, the broken position of the outer sheath is blocked by the aid of elasticity of the elastic membrane, and water sources in rivers enter a space between the isolation layer and the outer sheath along the broken position of the outer sheath is reduced.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view of a cable;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
in the figure: the cable comprises a cable 1, a main guide core 2, an insulating layer 21, an outer sheath 3, a filling layer 4, floating balls 41, fluorescent paint 411, a separation layer 42, an elastic membrane 43, silk threads 44, a water-blocking yarn layer 45, micropores 46, an isolation layer 5 and hemp ropes 6.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 3, the cross-linked polyethylene insulated water-blocking power cable according to the present invention includes a cable 1; the cable 1 comprises a main guide core 2, an insulating layer 21, a filling layer 4 and an isolating layer 5; the peripheral sides of the surfaces of the main guide cores 2 are sleeved with insulating layers 21; the insulating layer 21 is made of waterproof rubber material; the surface of the insulating layer 21 is sleeved with an isolating layer 5; the outer sheath 3 is sleeved on the surface of the isolation layer 5; the inner diameter of the outer sheath 3 is larger than the outer diameter of the isolation layer 5; the space between the isolation layer 5 and the outer sheath 3 is a filling layer 4; granular filling materials and floating balls 41 are filled in the space in the filling layer 4;
when the cable 1 works, the insulating layer 21 is sleeved on the outer surface of the main guide core 2, the insulating layer 21 electrically isolates the main guide core 2 from the ground and the main guide cores 2 of different phases, so that the insulating layer 21 protects the main guide core 2 and simultaneously ensures electric energy transmission in the main guide core 2, the insulating layer 5 is sleeved on the outer surface of the insulating layer 21, the insulating layer 5 fully wraps and integrates the plurality of main guide cores 2 into a whole, the insulating layer 5 forms a second protective layer of the main guide core 2 to prevent external substances from contacting and damaging the main guide cores 2, a gap is reserved between the insulating layer 5 and the outer sheath 3 because the outer diameter of the insulating layer 5 is smaller than the inner diameter of the outer sheath 3, a filler is filled in the gap between the insulating layer 5 and the outer sheath 3, the filler is made of concentrated plastic particles to enhance the roundness of the cable 1, and when the cable 1 is placed at the bottom of a river for a long time, when the water in the river has a high flow rate, glass fragments or metal sheets and sharp gravels in the river are driven to flow and impact the surface of the cable 1, so that the protective layer of the cable 1 is damaged, and the cable 1 has potential safety hazards in the use process, because the cable 1 is positioned at the bottom of the river, a maintenance worker cannot quickly find the damaged part of the cable 1 and timely maintain the damaged part of the cable 1, when the glass fragments or metal sheets in the river flow and impact the outer sheath 3 of the cable 1, granular filling materials are filled in the filling layer 4, and when the outer sheath 3 is damaged, the filling materials can also prevent the water in the river from entering the filling layer space along the damaged part of the outer sheath 3, so that the water entering along the damaged part can be prevented from permeating into the length direction of the cable 1, and uniformly arranged floating balls 41 are filled in the gap between the isolation layer 5 and the outer sheath 3, when the damaged area of the outer sheath 3 is larger than the diameter of the floating ball 41, the floating ball 41 flows out along the damaged part of the outer sheath 3 and floats to the water surface of a river to remind maintenance personnel of the warning cable 1, so that the damaged part of the outer sheath 3 can be maintained in time, and when the damaged area of the outer sheath 3 is smaller than the diameter of the floating ball 41, the floating ball 41 can also stop the damaged part to reduce the loss of the filler, so that the service life of the cable 1 is prolonged.
As an embodiment of the present invention, a silk thread 44 is fixedly connected to the bottom of the floating ball 41; an elastic membrane 43 is fixedly connected to one end of the silk thread 44, which is far away from the floating ball 41; the elastic film 43 is fixedly connected with the outer surface of the isolation layer 5 and is positioned in the space in the filling layer 4; when in work, in order to further reduce the time for the maintainer of the cable 1 to search the damaged part of the outer sheath 3 of the cable 1, the silk thread 44 is fixedly connected to the bottom of the floating ball 41, so that the floating range of the floating ball 41 is restrained by the silk thread 44, when a maintainer of the cable 1 maintains the cable 1, the position of the floating ball 41 is searched, the silk thread 44 which is along the bottom of the floating ball 41 can be quickly locked to the damaged position of the outer sheath 3, thereby the outer sheath 3 can be maintained in time, when the floating ball 41 flows out along the damaged part of the outer sheath 3, the floating ball 41 drives the silk thread 44 to move upwards above the water surface, by fixedly connecting the elastic membrane 43 at the end of the thread 44 far away from the floating ball 41, the thread 44 stretches the elastic membrane 43, so that the elastic membrane 43 blocks the damaged part of the outer sheath 3 and reduces the water source in the river from entering the space between the isolation layer 5 and the outer sheath 3 along the damaged part of the outer sheath 3.
As an embodiment of the present invention, the connecting portions of the elastic membrane 43 and the silk 44 are both provided with micropores 46; a water-blocking yarn layer 45 is fixedly connected between the elastic film 43 and the isolation layer; the inner surface of the water-blocking yarn layer 45 is fixedly connected with the outer surface of the isolation layer 5; when the cable water-blocking yarn works, the connecting parts of the elastic membrane 43 and the silk threads 44 are provided with the micropores 46, the silk threads 44 pull the elastic membrane 43 to block the damaged parts, so that water in a river enters the space between the elastic membrane 43 and the isolating layer 5 along the micropores 46, the water-blocking yarn layer 45 is contacted with the surface of one end, far away from the silk threads 44, of the elastic membrane 43 and enters the space in the elastic membrane 43 to be contacted with the water-blocking yarn layer 45, the water-blocking function of the cable water-blocking yarn is that when the water-blocking yarn fiber main body is in contact with water, the water-blocking yarn can rapidly expand to form jelly with a large volume, the micropores 46 are blocked by the expanded water-blocking yarn layer, so that the water in the river is prevented from continuously permeating and diffusing, the purpose of water blocking is achieved, the water-blocking yarn layer 45 drives the elastic membrane 43 to synchronously expand after expanding, so that the elastic membrane 43 can be fully attached to the damaged parts of the outer sheath 3 to form a protective layer, and the water in the river is prevented from entering the space in the filling layer 3 along the damaged parts, and the water can be prevented from spreading in the inner space of the filling layer along the length direction of the cable 1, and the water tree phenomenon is effectively avoided.
As an embodiment of the present invention, a uniformly arranged separation layer 42 is fixedly connected between the separation layer 5 and the outer sheath 3; the separation layer 42 is in a vertical separation plate shape, and the length direction of the separation layer is the same as that of the cable 1; the bottom of the separation layer 42 is vertically connected with the outer surface of the separation layer 5, and the top of the separation layer is vertically connected with the inner surface of the outer sheath 3; during operation, the separation layer 42 is uniformly arranged between the separation layer 5 and the outer sheath 3, the floating ball 41, the filling material and the elastic membrane 43 are uniformly divided into a plurality of sections through the separation layer 42, the surface of the outer sheath 3 in any section is damaged at the moment, water in a river can only enter the section corresponding to the damaged section along the damaged section, and the water entering the space in the outer sheath 3 can be effectively prevented from permeating into other sections.
As an embodiment of the present invention, the outer surface of the floating ball 41 is coated with a fluorescent paint 411; the during operation, when the damaged department of urgent maintenance cable 1 night, through having scribbled fluorescent paint 411 at the surface of floater 41 for floater 41 can give off the radiance at night, and the maintenance personal just can be quick seeks the damaged position of finding cable 1 according to the radiance that floater 41 gives off, thereby the maintenance personal can be timely the maintenance of the damaged department of completion cable 1.
As an embodiment of the present invention, uniformly arranged twines 6 are fixedly connected to a space between the isolation layer 5 and the insulation layer 21; during operation, through the hemp rope 6 of the even setting of space fixedly connected with between isolation layer 5 and insulating layer 21, hemp rope 6 has flame retardant property through what the fire retardant was handled, can effectively fill the gap of 1 inner space of cable, can also strengthen cable 1's tensile strength simultaneously to and reinforcing cable 1's pliability, improve cable 1's structural strength.
The specific operation flow is as follows:
the insulating layer 21 is sleeved on the outer surface of the main guide core 2, the insulating layer 21 electrically isolates the main guide core 2 from the ground and the main guide cores 2 of different phases, so that the insulating layer 21 protects the main guide core 2 and simultaneously ensures the electric energy transmission in the main guide core 2, the insulating layer 5 is sleeved on the outer surface of the insulating layer 21 and fully wraps and integrates a plurality of main guide cores, the insulating layer 5 forms a second protective layer of the main guide core 2 to prevent external substances from contacting and damaging the main guide core 2, because the outer diameter of the insulating layer 5 is smaller than the inner diameter of the outer sheath 3, a gap is reserved between the insulating layer 5 and the outer sheath 3, a filler is filled in the gap between the insulating layer 5 and the outer sheath 3, the filler is made of concentrated plastic particles, the roundness of the cable 1 is enhanced, the insulating degree of the cable 1 can be effectively increased, and when the cable 1 is placed at the bottom of a river for a long time, when the water in the river has a high flow rate, glass fragments or metal sheets and sharp gravels in the river are driven to flow and impact the surface of the cable 1, so that the protective layer of the cable 1 is damaged, and the cable 1 has potential safety hazards in the use process, because the cable 1 is positioned at the bottom of the river, a maintenance worker cannot quickly find the damaged part of the cable 1 and timely maintain the damaged part of the cable 1, when the glass fragments or metal sheets in the river flow and impact the outer sheath 3 of the cable 1, the filling material is filled in the space in the filling layer 4, when the outer sheath 3 is damaged, the filling material can also prevent the water in the river from entering the space in the filling layer along the damaged part of the outer sheath 3, so that the water entering along the damaged part can be prevented from permeating into the length direction of the cable 1, and uniformly arranged floating balls 41 are filled in the gap between the isolation layer 5 and the outer sheath 3, when the damaged area of the outer sheath 3 is larger than the diameter of the floating ball 41, the floating ball 41 flows out along the damaged part of the outer sheath 3 and floats to the water surface of a river to remind maintenance personnel of the warning cable 1, so that the damaged part of the outer sheath 3 can be maintained in time, and when the damaged area of the outer sheath 3 is smaller than the diameter of the floating ball 41, the floating ball 41 can also stop the damaged part to reduce the loss of the filler, so that the service life of the cable 1 is prolonged.
In order to further reduce the time for a cable 1 maintainer to search the damaged part of the outer sheath 3 of the cable 1, the silk thread 44 is fixedly connected to the bottom of the floating ball 41, so that the silk thread 44 restrains the floating range of the floating ball 41, when the cable 1 maintainer searches the position of the floating ball 41 during the maintenance of the cable 1, the silk thread 44 at the bottom of the floating ball 41 can be quickly locked to the damaged part of the outer sheath 3, so that the outer sheath 3 can be timely maintained, when the floating ball 41 flows out along the damaged part of the outer sheath 3, the floating ball 41 drives the silk thread 44 to move upwards above the water surface, the elastic membrane 43 is fixedly connected to one end, far away from the floating ball 41, of the silk thread 44, so that the silk thread 44 stretches the elastic membrane 43, the damaged part of the outer sheath 3 is blocked by the elastic membrane 43, and the water source in a river enters the space between the isolation layer 5 and the outer sheath 3 along the damaged part of the outer sheath 3 is reduced.
Because the connecting parts of the elastic membrane 43 and the silk threads 44 are provided with micropores, the diameter of the micropores is larger than that of water molecules, the silk threads 44 pull the elastic membrane 43 to block the damaged part, so that water in a river enters the inner space of the elastic membrane 43 along the micropores, the water blocking yarn layer 45 is contacted with the surface of one end of the elastic membrane 43 far away from the silk threads 44 and enters the inner space of the elastic membrane 43 to be contacted with the water blocking yarn layer 45, the water blocking function of the cable water blocking yarn is that when the water blocking yarn fiber main body is contacted with water, the cable water blocking yarn can rapidly expand to form jelly with large volume, the water retaining capacity of the jelly is quite strong, so that the moisture is prevented from continuously permeating and diffusing, the purpose of blocking water is achieved, the water blocking yarn layer 45 expands to drive the elastic membrane 43 to be fully attached to the damaged part of the outer sheath 3 to form a protective layer, and the water in the river is prevented from entering the inner space of the filling layer 3 along the damaged part, and the water can be prevented from spreading in the inner space of the filling layer along the length direction of the cable 1, and the water tree phenomenon is effectively avoided.
Fixedly connected with evenly arranged's separate layer 42 between isolation layer 5 and oversheath 3, divide into a plurality of intervals through separate layer 42 with floater 41, stopping and elastic membrane 43 is even, no matter which section's oversheath 3 surface appears damaged this moment, and the water in the river can only enter into the interval that corresponds with damaged department along enough damaged department, and the water that can effectual prevention enters into the 3 inner spaces of oversheath infiltrates other intervals.
When the damaged department of urgent maintenance cable 1 at night, through having scribbled fluorescent paint 411 at the surface of floater 41 for floater 41 can give off the radiance at night, and maintenance personal just can be quick according to the radiance that floater 41 gived off finds the damaged position of cable 1, thereby maintenance personal can be timely the maintenance of the damaged department of completion cable 1.
Through the hemp rope 6 of the even setting of space fixedly connected with between isolation layer 5 and insulating layer 21, can effectively fill the gap of 1 inner space of cable, can also strengthen cable 1's tensile strength simultaneously to and strengthen cable 1's pliability, improve cable 1's structural strength.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides an insulating power cable that blocks water of crosslinked polyethylene which characterized in that: comprising a cable (1); the cable (1) comprises a main guide core (2), an insulating layer (21), a filling layer (4) and an isolating layer (5); insulating layers (21) are sleeved on the peripheral sides of the surfaces of the main guide cores (2); the insulating layer (21) is made of waterproof rubber material; the surface of the insulating layer (21) is sleeved with an isolating layer (5); the outer sheath (3) is sleeved on the surface of the isolation layer (5); the inner diameter of the outer sheath (3) is larger than the outer diameter of the isolation layer (5); the space between the isolation layer (5) and the outer sheath (3) is a filling layer (4); the space in the filling layer (4) is filled with granular filling materials and floating balls (41).
2. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: the bottom of the floating ball (41) is fixedly connected with a silk thread (44); one end of the silk thread (44) far away from the floating ball (41) is fixedly connected with an elastic membrane (43); the outer surface of the isolation layer (5) of the elastic film (43) is fixedly connected and is positioned in the space of the filling layer (4).
3. The insulated crosslinked polyethylene water-blocking power cable according to claim 2, wherein: micropores (46) are formed at the joints of the elastic membrane (43) and the silk threads (44); a water-blocking yarn layer (45) is fixedly connected between the elastic film (43) and the isolation layer; the inner surface of the water-blocking yarn layer (45) is fixedly connected to the outer surface of the isolation layer (5).
4. The insulated crosslinked polyethylene water-blocking power cable according to claim 3, wherein: a separating layer (42) which is uniformly arranged is fixedly connected between the separating layer (5) and the outer sheath (3); the separation layer (42) is in a vertical separation plate shape, and the length direction of the separation layer is the same as that of the cable (1); the bottom of the separation layer (42) is vertically connected with the outer surface of the isolation layer (5), and the top of the separation layer is vertically connected with the inner surface of the outer sheath (3).
5. The insulated crosslinked polyethylene water-blocking power cable according to claim 4, wherein: the outer surface of the floating ball (41) is coated with fluorescent paint (411).
6. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: hemp ropes (6) which are uniformly arranged are fixedly connected in the space between the isolation layer (5) and the insulation layer (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291230.4A CN114049989A (en) | 2021-10-28 | 2021-10-28 | Cross-linked polyethylene insulated water-blocking power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291230.4A CN114049989A (en) | 2021-10-28 | 2021-10-28 | Cross-linked polyethylene insulated water-blocking power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114049989A true CN114049989A (en) | 2022-02-15 |
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ID=80206870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111291230.4A Pending CN114049989A (en) | 2021-10-28 | 2021-10-28 | Cross-linked polyethylene insulated water-blocking power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114049989A (en) |
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2021
- 2021-10-28 CN CN202111291230.4A patent/CN114049989A/en active Pending
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