CN208045128U - Water resistant tree power cable with cross-linked polyethylene insulation is pressed in one kind - Google Patents

Abstract

The utility model discloses water resistant tree power cable with cross-linked polyethylene insulation is pressed in one kind, it is followed successively by copper molded line round compacted comductor, insulation screen, the metal layer with function of shielding, comprehensive metal armor layers and low-smoke non-halogen flame-retardant outer jacket from the inside to the outside；The insulation screen is followed successively by graphene semiconductive conductor shield, the crosslinked polyetylene insulated layer of water resistant tree and anti-embedded type strippable semi-conductive insulation screen from the inside to the outside；The metal layer with function of shielding includes ripple copper wire winding shielded layer and cathode copper band；The comprehensive metal armor layers are followed successively by low-smoke non-halogen flame-retardant separation sleeve, brass band and nonmagnetic metal silk armor from the inside to the outside.The utility model power cable has the features such as compact-sized, tension, compression strength are high, safety and environmental protection, is suitable for chemical plant, power station, building, public place etc..

Description

Water resistant tree power cable with cross-linked polyethylene insulation is pressed in one kind

Technical field

Water resistant tree power cable with cross-linked polyethylene insulation is pressed in being used the utility model is related to a kind of wisdom energy.

Background technology

In cable industry, main metallic conductor to be used has copper, aluminium and aluminium alloy, the structure of conductor also to have very much Kind, the structure of medium-pressure power cable conductor is mainly round compacted comductor, and aluminium profiles line or aluminium alloy molded line conductor are mainly used for frame Hollow wire, copper heterotype conductor are mainly used for submarine cable, apply fewer on the medium-pressure power cable of fixed laying.

The medium-pressure power cable of long length has certain corrosive moist place, the steam in environment for chemical plant etc. It is readily permeable to conductor and insulation in, and then insulating layer formed water tree, shorten the service life of cable.Meanwhile it greatly enhancing The medium-pressure power cable of degree for cable semi-conductive insulation shield and metallic shield it is more demanding, lay the complexity of environment It is required that cable has certain tension and compressive property, and armor should have certain corrosion resistance.

Utility model content

The purpose of this utility model is to provide pressure water resistant tree cross-inked polyethylene power cable in one kind.

Realizing the technical solution of the utility model aim is：Water resistant tree power cable with cross-linked polyethylene insulation is pressed in one kind, It is followed successively by copper molded line round compacted comductor, insulation screen, the metal layer with function of shielding, comprehensive metal armouring from the inside to the outside Layer and low-smoke non-halogen flame-retardant outer jacket；The insulation screen is followed successively by graphene semiconductive conductor shield, resists from the inside to the outside The crosslinked polyetylene insulated layer of water tree and anti-embedded type strippable semi-conductive insulation screen；The metal layer with function of shielding Shielded layer and cathode copper band are wound including ripple copper wire；The comprehensive metal armor layers are followed successively by low-smoke non-halogen flame-retardant from the inside to the outside Separation sleeve, brass band and nonmagnetic metal silk armor.

Twisted knot is pressed in multilayer trapezoidal copper monofilament layering in circular monofilaments periphery centered on the copper molded line round compacted comductor Structure；The cathode copper tape thickness is 0.1mm, clearance rate >=200%；The structure of the comprehensive metal armor layers is from the inside to the outside： Low-smoke non-halogen flame-retardant separation sleeve, the brass band of wrapped 2 layers of 0.1mm thickness, then twisted multiply stainless steel flat wire or multiply aluminium The thickness of silk, stainless steel flat wire is 0.8mm, and the gap of stainless flat wire is no more than the width of a steel wire, the diameter of aluminium wire Size is divided into tri- kinds of 2.5mm, 3.15mm and 4.0mm according to tension, compression strength, and the gap of aluminium wire is no more than the straight of aluminium wire Diameter.

Above-mentioned technical proposal is used, the utility model has advantageous effect below：(1) the utility model uses one Stranded mode is pressed in circular central monofilament and more trapezoidal copper monofilament layerings, and conductive surface is more smooth, can reduce cable breakdown Failure rate, conductor strand press densification, and tightening factor reaches 96%~98%, and outer diameter is small, save making for the outer a variety of materials of conductor Dosage, the round compacted comductor that traditional round wires copper monofilament can be replaced to be twisted into, and performance is more excellent.It can meet anti-steam simultaneously to ooze Saturating requirement has good radially or longitudinally fire resistance characteristic.

(2) conductor shield of the utility model uses graphene semiconductive conductor shield, substantially improves semiconductive Shield the electric conductivity and processing performance of material；Insulating layer is crosslinked polyetylene insulated using water resistant tree, and it is exhausted can to significantly improve cable The water tree structure that crosslinked polyethylene in edge layer is generated because steam permeates, water tree length is relative to the poly- second of peroxide crosslinking Alkene is substantially reduced, and significantly improves the service life of insulated cable；Insulation screen is insulated using anti-embedded type strippable semi-conductive Shielded layer, can effectively reduce copper wire winding shielding impression, impression caused by insulation screen can control in American Standard ICEA What 94-649 was required is less than or equal to 0.18mm, while having excellent electric property, reduces the difficulty of cable construction, is installing It is more convenient advantageous in laid processes.

(3) the utility model winds more copper wires as metal screen layer, copper wire winding shielding outside cable insulation core It uses distributor plate that can be produced with the brass wire shielding equipment of reciprocating rotation corrugated, then dredges around one layer of cathode copper band, it is long in cable When phase runs fever expansion, copper wire winding shielding impression caused by insulation screen can be further decreased, while cable is being made When making terminal or transition joint, copper wire can be pulled out, reduce the cable caused by copper wire curtailment and waste, increase operation rate and subtract Few cost allowance.

(4) cable of the utility model has preferably selected brass band to add nonmagnetic metal silk as comprehensive metal armouring Layer, brass band is very stable to general corrosion, and has certain tensile strength, contacts and is not easy with stainless steel flat wire or aluminium wire Electrochemical corrosion is generated, there is good mechanical performance and electric property.

(5) the crosslinked polyetylene insulated copper molded line conductors power cable tool of the middle pressure water resistant tree of the method manufacture of the utility model There are tension, anti-pressure ability strong, the reliable feature of performance safety.

Description of the drawings

In order to make the content of the utility model be easier to be clearly understood, below according to specific embodiment and combine attached Figure, is described in further detail the utility model, wherein

Fig. 1 is the structural schematic diagram of the embodiments of the present invention 1.

Fig. 2 is the structural schematic diagram of the embodiments of the present invention 2.

In attached drawing marked as：

Copper molded line round compacted comductor 1, insulation screen 2, graphene semiconductive conductor shield 21, the crosslinking of water resistant tree are poly- Ethylene insulating layer 22, anti-embedded type strippable semi-conductive insulation screen 23, the metal layer 3 with function of shielding, ripple copper wire Wind shielded layer 31, cathode copper band 32, comprehensive metal armor layers 4, low-smoke non-halogen flame-retardant separation sleeve 41, brass band 42, non magnetic Wire armor 43, low-smoke non-halogen flame-retardant outer jacket 5.

Specific implementation mode

(embodiment 1)

See that Fig. 1, the middle pressure water resistant tree power cable with cross-linked polyethylene insulation of the present embodiment are obtained as steps described below：

Step 1：Make copper molded line round compacted comductor 1.This step uses Germany NIEHOFF double end continuous annealing copper big first Machine drawing matches mould technology using continuous modification, draws trapezoidal monofilament.Again using the French POURTIER with preforming noseplate 91 disk frame winch of type carries out circle to conductor metal monofilament and presses process.Tightening factor reaches 96%~98%.To completing Copper molded line conductor tested, D.C. resistance experiment meets requirements of the national standard.

The copper molded line round compacted comductor surface that the present embodiment obtains is more smooth, can reduce cable breakdown failure rate, lead Body is twisted to press densification, and tightening factor reaches 96%~98%, and outer diameter is small, sees with the comparison of typical round compact conductor product outer diameter Table 1：

Table 1

Step 2：The crosslinked polyetylene insulated core of water resistant tree is made, structure includes copper molded line round compacted comductor 1, graphite The crosslinked polyetylene insulated layer 22 of alkene semiconductive conductor shield 21, water resistant tree, anti-embedded type strippable semi-conductive insulation screen 23.This step is three-layer co-extruded by the CCV catenary suspension type continuous vulcanization production lines of German TROESTER by copper molded line round compacted comductor 1, once Molding completes the production, and the water resistant tree cross linked insulation core to complete carries out drying chamber heat de-airing process, improves insulated wire cores Electrically and mechanically intensity.

Step 3：The metal layer 3 with function of shielding is made, structure includes ripple copper wire 31, dredges around cathode copper band 32.It is right Ripple copper wire is wound outside the 2. crosslinked polyetylene insulated core of water resistant tree that step obtains, then dredges the electrolysis around one layer of 0.1mm thickness Copper strips, clearance rate >=200%.

Step 4：Make comprehensive metal armor layers 4.The present embodiment is using low smoke halogen-free flame-retardant polyolefin as separation sleeve 41, the brass band 42 of wrapped 2 layers of 0.1mm thickness is put up outside separation sleeve 41, is wound outside brass band by wire armoring machine The stainless steel flat wire of 0.8mm thickness, the gap of stainless flat wire must not exceed steel wire, improve the anti-of metal armor layers Extensional energy and tensile property.

Step 5：Make outer jacket 5.This step is extruded outside comprehensive metal armor layers 4 and is protected outside one layer of low-smoke non-halogen flame-retardant Set has low cigarette, Halogen, fire-retardant characteristic.

(embodiment 2)

See Fig. 2, the crosslinked polyetylene insulated copper molded line conductors power cable of middle pressure water resistant tree and 1 base of embodiment of the present embodiment This is identical, the difference is that：The structure of comprehensive metal armor layers 4 is：Low-smoke non-halogen flame-retardant separation sleeve 41, wrapped 2 layers of 0.1mm The brass band 42 of thickness, multiply aluminium wire lay configuration, the diameter of aluminium wire according to tension, compression strength be divided into 2.5mm, 3.15mm and tri- kinds of 4.0mm, the gap of aluminium wire must not exceed the diameter of an aluminium wire.

Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, is not limited to this Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap Containing being within the protection scope of the utility model.

Claims (4)

1. pressing water resistant tree power cable with cross-linked polyethylene insulation in one kind, it is characterised in that：It is tight that it is followed successively by copper molded line from the inside to the outside Press round conductor (1), insulation screen (2), the metal layer (3) with function of shielding, comprehensive metal armor layers (4) and low cigarette without The fire-retardant outer jacket of halogen (5)；The insulation screen (2) is followed successively by graphene semiconductive conductor shield (21), resists from the inside to the outside The crosslinked polyetylene insulated layer of water tree (22) and anti-embedded type strippable semi-conductive insulation screen (23)；It is described that there is function of shielding Metal layer (3) include ripple copper wire winding shielded layer (31) and cathode copper band (32)；The comprehensive metal armor layers (4) are by interior To being followed successively by low-smoke non-halogen flame-retardant separation sleeve (41), brass band (42) and nonmagnetic metal silk armor (43) outside.

2. pressing water resistant tree power cable with cross-linked polyethylene insulation in one kind according to claim 1, it is characterised in that：It is described Lay configuration is pressed in multilayer trapezoidal copper monofilament layering in circular monofilaments periphery centered on copper molded line round compacted comductor (1).

3. pressing water resistant tree power cable with cross-linked polyethylene insulation in one kind according to claim 2, it is characterised in that：It is described Cathode copper band (32) thickness is 0.1mm, clearance rate >=200%.

4. pressing water resistant tree power cable with cross-linked polyethylene insulation in one kind according to claim 3, it is characterised in that：It is described The structure of comprehensive metal armor layers (4) is from the inside to the outside：Low-smoke non-halogen flame-retardant separation sleeve (41), the Huang of wrapped 2 layers of 0.1mm thickness The thickness of copper strips (42), then twisted multiply stainless steel flat wire or multiply aluminium wire, stainless steel flat wire is 0.8mm, stainless flat The gap of steel wire is no more than the width of a steel wire, the diameter of aluminium wire according to tension, compression strength be divided into 2.5mm, 3.15mm and tri- kinds of 4.0mm, the gap of aluminium wire are no more than the diameter of an aluminium wire.