CN205487399U - Crosslinked polyethylene insulated cable - Google Patents
Crosslinked polyethylene insulated cable Download PDFInfo
- Publication number
- CN205487399U CN205487399U CN201620260196.2U CN201620260196U CN205487399U CN 205487399 U CN205487399 U CN 205487399U CN 201620260196 U CN201620260196 U CN 201620260196U CN 205487399 U CN205487399 U CN 205487399U
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- inner sheath
- metal inner
- cable
- buffer protection
- crosslinked polyetylene
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Abstract
The utility model relates to a crosslinked polyethylene insulated cable, including location core, the insulating cover of four crosslinked polyethylene of group, pipe shape metal inner sheath, pipe shape buffer protection cover, the pipe shape oversheath that lies in central authorities, it has one deck heat -conduction insulation layer to pack between metal inner sheath and the insulating cover of four crosslinked polyethylene of group, and the metal inner sheath is provided with the heat conduction protective layer between overlapping with buffer protection, inlays " article " the wire that appears that has many in the heat conduction protective layer. This cable improved ordinary crosslinked polyethylene insulated cable twist, reverse, buckle, by a wide margin deformation or the technical defect of skew can take place for its inside bunched conductors under crooked, the effect of external force such as blocking, guarantee that the bunched conductors can normal work and follow -up construction and installation, under the effect of heat -conduction insulation layer, metal inner sheath, heat conduction protective layer and metallic wire, the radiating efficiency of the cable is high, and heat transmission effect is good, and cable life improves.
Description
Technical field
This utility model relates to a kind of cable, particularly relates to a kind of cross-linked polyethylene insulated cable.
Background technology
Cross-linked polyethylene insulated cable is to utilize chemically or physically, cable insulation polyethylene molecule is made to be changed into main body network molecular structure by linearity molecular structure, the most thermoplastic polyethylene is changed into heat cured crosslinked polyethylene, thus it is greatly improved its thermostability and mechanical performance, decrease its contractility, not re-melting after making it be heated, and maintain excellent electric property.
Cross-linked polyethylene insulated cable uses the method for peroxide crosslinking, makes polyethylene molecule be become tridimensional network from linear molecular structure, thermoplastic becomes thermosets, and operating temperature brings up to 90 DEG C from 70 DEG C, significantly improves the current capacity of cable.Cross-linked polyethylene insulated cable be applicable to power distribution network, commercial plant or other need Large Copacity electrical domain, for fixing exchange 50Hz, rated voltage 6kV～the electrical power distribution electric line of 35kV of being laid in, major function is conveying electric energy.
But existing cross-linked polyethylene insulated cable is in use, its internal strand often deforms or offsets, and has not only had a strong impact on the installation of cable, even can damage cable time serious, reduces the service life of cable.Strand often deforms or situation about offseting mainly has two kinds: one is that cross-linked polyethylene insulated cable is laid in indoor, in raceway groove and pipe, for high drop district, also can be embedded in loose soil, the most often bear the effect of external force, when in work progress cable be distorted, reverse, bend, bend, block etc. external force effect under, its internal strand can occur significantly to deform or offset；Another is, the maximum amount fixed temperature of the strand within cross-linked polyethylene insulated cable is 90 DEG C, when cross-linked polyethylene insulated cable in use occurs abnormal, during such as part line short, the maximum temperature of strand can reach 250 DEG C, component within cross-linked polyethylene insulated cable is due to the most intensive, and for ensureing the insulation of cross-linked polyethylene insulated cable, stablizing of the performance such as waterproof, heat within cross-linked polyethylene insulated cable can not be timely, quickly outwards distribute, component within cross-linked polyethylene insulated cable at high temperature can occur significantly dilatancy, skew, have a strong impact on the use of cross-linked polyethylene insulated cable.
Utility model content
The deficiency that this utility model exists for prior art, it is provided that a kind of cross-linked polyethylene insulated cable, concrete technical scheme is as follows:
A kind of cross-linked polyethylene insulated cable; including centrally located locating core, four groups of crosslinked polyetylene insulated sets, tubular metal inner sheath, tubular buffer protection set, tubular oversheaths; locating core is arranged on the central authorities of metal inner sheath; four groups of crosslinked polyetylene insulated sets are arranged at the inside of metal inner sheath and four groups of crosslinked polyetylene insulated sets are symmetrically distributed in the surrounding of locating core; it is provided with gap between adjacent crosslinked polyetylene insulated set; metal inner sheath is arranged on the inside of buffer protection set, and buffer protection is set on the inside of oversheath；The edge of described locating core is symmetrically arranged with four arc positioning grooves；Upper top that described crosslinked polyetylene insulated set includes matching with locating slot, arc next top, right side, left side, the girth of next top is more than the girth of upper top, and right side and left side are mutually perpendicular to；The inside of described crosslinked polyetylene insulated set is filled with strand, and strand is crushed to by multiple conducting wires, and the outside of strand is provided with one layer by protection band fully wrapped around for strand；Being filled with one layer of thermally conductive insulating layer between described metal inner sheath and four groups of crosslinked polyetylene insulated sets, the outer surface of thermally conductive insulating layer is provided with one layer by semiconductor waterstop fully wrapped around for thermally conductive insulating layer；Being provided with heat conduction protective layer between described metal inner sheath and buffer protection set, be inlaid with many " product " shape tinsels in heat conduction protective layer, tip wiry contacts with buffer protection set, and tail end wiry contacts with metal inner sheath.
As the improvement of technique scheme, described right side is provided with a plurality of first convex tendon, between the first adjacent convex tendon, is provided with gap；It is provided with a plurality of second convex tendon on described left side, between the second adjacent convex tendon, is provided with gap.
As the improvement of technique scheme, the bearing of trend of described first convex tendon is vertical with the radial direction of crosslinked polyetylene insulated set, and the bearing of trend of described second convex tendon is vertical with the radial direction of crosslinked polyetylene insulated set.
As the improvement of technique scheme, described tinsel is made up of three metal monofilament arranged in " product " shape, is integral type structure between adjacent metal monofilament.
Improvement as technique scheme; the outer surface of described metal inner sheath is provided with multiple triangle fin; the inner surface of described buffer protection set is provided with the arc groove matched in tip multiple and wiry, and the outer surface of buffer protection set is provided with spiral type the 3rd convex tendon.
As the improvement of technique scheme, it is integral type structure between described fin and metal inner sheath, is integral type structure between the 3rd convex tendon and buffer protection set.
Cross-linked polyethylene insulated cable described in the utility model improve common cross-linked polyethylene insulated cable distorting, reverse, bend, bend, block etc. its internal strand under the effect of external force the technological deficiency significantly deforming or offset can occur, it is ensured that strand can normally work and subsequent installation is constructed；Under thermally conductive insulating layer, metal inner sheath, heat conduction protective layer and effect wiry; the radiating efficiency of this cable is high; heat-transfer effect is good; the inside avoiding heat to accumulate in this cable makes its internals occur expansion shift, deformation even to damage under the effect of high temperature; this cable is not deformed at a temperature of the use continuously of 130 ~ 150 DEG C, and cable improves service life.
Accompanying drawing explanation
Fig. 1 is cross-linked polyethylene insulated cable structural representation described in the utility model；
Fig. 2 is locating core structural representation described in the utility model；
Fig. 3 is crosslinked polyetylene insulated nested structure schematic diagram described in the utility model；
Fig. 4 is metal inner sheath structural representation described in the utility model；
Fig. 5 is partial enlarged drawing at A in Fig. 4；
Fig. 6 is metal wire structure schematic diagram described in the utility model；
Fig. 7 is buffer protection nested structure schematic diagram described in the utility model；
Fig. 8 is partial enlarged drawing at B in Fig. 7；
Fig. 9 is buffer protection nested structure schematic diagram (vertical view state) described in the utility model.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
As shown in Fig. 1 ~ 9, Fig. 1 is cross-linked polyethylene insulated cable structural representation described in the utility model, Fig. 2 is locating core structural representation described in the utility model, Fig. 3 is crosslinked polyetylene insulated nested structure schematic diagram described in the utility model, Fig. 4 is metal inner sheath structural representation described in the utility model, Fig. 5 is partial enlarged drawing at A in Fig. 4, Fig. 6 is metal wire structure schematic diagram described in the utility model, Fig. 7 is buffer protection nested structure schematic diagram described in the utility model, Fig. 8 is partial enlarged drawing at B in Fig. 7, Fig. 9 is buffer protection nested structure schematic diagram (vertical view state) described in the utility model.Described cross-linked polyethylene insulated cable, including centrally located locating core 10, four groups of crosslinked polyetylene insulated sets 20, tubular metal inner sheath 50, tubular buffer protection set 70, tubular oversheath 80, locating core 10 is arranged on the central authorities of metal inner sheath 50, four groups of crosslinked polyetylene insulated sets 20 are arranged at the inside of metal inner sheath 50 and four groups of crosslinked polyetylene insulated sets 20 are symmetrically distributed in the surrounding of locating core 10, it is provided with gap between adjacent crosslinked polyetylene insulated set 20, metal inner sheath 50 is arranged on the inside of buffer protection set 70, buffer protection set 70 is arranged on the inside of oversheath 80；The edge of described locating core 10 is symmetrically arranged with four arc positioning grooves 11；Upper top 201 that described crosslinked polyetylene insulated set 20 includes matching with locating slot 11, arc next top 202, right side 203, left side 204, the girth of next top 202 is more than the girth of upper top 201, and right side 203 and left side 204 are mutually perpendicular to；The inside of described crosslinked polyetylene insulated set 20 is filled with strand 22, and strand 22 is crushed to by multiple conducting wires, and the outside of strand 22 is provided with one layer by protection band 21 fully wrapped around for strand 22；Being filled with one layer of thermally conductive insulating layer 30 between described metal inner sheath 50 and four groups of crosslinked polyetylene insulated sets 20, the outer surface of thermally conductive insulating layer 30 is provided with one layer by semiconductor waterstop 40 fully wrapped around for thermally conductive insulating layer 30；It is provided with heat conduction protective layer 60 between described metal inner sheath 50 and buffer protection set 70; many " product " shape tinsels 61 it are inlaid with in heat conduction protective layer 60; the tip of tinsel 61 contacts with buffer protection set 70, and the tail end of tinsel 61 contacts with metal inner sheath 50.
As shown in Figure 2, the structure of locating core 10 is similar to " ten " font, locating core 10 has positioning action, ensure when making cable, under the traction of locating core 10, the strand 22 of crosslinked polyetylene insulated set 20 and inside thereof is not susceptible to skew, not only reduces difficulty of processing, also utilizes cable machine-shaping；And locating core 10 combines metal inner sheath 50, make whole cable in follow-up use either distorting, reverse, bend, bend, when the external force such as blocking, the strand 22 being still avoided that in four groups of crosslinked polyetylene insulated sets 20 occurs significantly to deform or offset, it is ensured that strand 22 can normally work and install.Four arc positioning grooves 11 on locating core 10 not only make to be easier to location between the most crosslinked polyetylene insulated set 20 and locating slot 11, combine, and owing to the girth of next top 202 is more than the girth of upper top 201, the orthogonal this structure being similar to " Vertical Triangular " in right side 203 and left side 204, make when whole cable is when being extruded by external force, the external force that crosslinked polyetylene insulated set 20 is subject to significantly is concentrated at locating core 10, it is to avoid offset；And under the buffer protection of locating core 10, offset, lead off upper top 201 pressure experienced of a part of four groups of crosslinked polyetylene insulated sets 20, it is to avoid strand 22 is damaged.
Protection band 21 be semiconductive nylon tape, the special many tengential belts of semiconductive, semi-conductive buffer water-blocking band, semiconductive block water the one in binding strap, semiconductive butyl rubber buffer strip, semiconductive brass wire shielding band, waterstop etc. or several, protect the kind with 21 according to the different size demand selection of cable.
While ensureing the insulating properties of thermally conductive insulating layer 30, high elastic modulus and mechanical strength, also there is the heat conductivity of excellence, improve the heat transfer efficiency of cable further；Described thermally conductive insulating layer 30 is made up of the polypropylene of 85 weight portions, the nylon of 5 weight portions, the magnesium hydroxide of 13 ~ 18 weight portions, steatite ceramic mixing extrusion at 210 ~ 230 DEG C of 6 ~ 12 weight portions；Wherein, before mixing extrusion, utilize silane coupler that magnesium hydroxide is carried out surface process, have magnesium silicate in steatite ceramic surface-coated.After polypropylene is extruded with nylon blending, while ensureing that its hot strength can reach more than 37MPa, under the common effect of cheap magnesium hydroxide and steatite ceramic, not only increase the heat transfer efficiency of thermally conductive insulating layer 30 but also optimize its low-temperature impact resistance, the heat conductivity of thermally conductive insulating layer 30 is 0.26 ~ 0.35W/ (m K), it is ensured that the temperature of use continuously of cable is indeformable at 130 ~ 150 DEG C.Magnesium hydroxide and steatite ceramic being carried out surface process so that it has good Stress Transfer in thermally conductive insulating layer 30 from body to dispersion phase, hot strength can improve 10%；At subzero 10 DEG C, impact strength can improve 60%.
Thermally conductive insulating layer 30 has insulation, excellent heat conductivility and waterproof function, it is to avoid wrap up one layer of insulation shielding again outside crosslinked polyetylene insulated set 20；And thermally conductive insulating layer 30 room temperature, uncured time be the processing of liquid, beneficially cable, making.Owing to being provided with gap between adjacent crosslinked polyetylene insulated set 20 so that four groups of crosslinked polyetylene insulated sets 20 are fully wrapped around by thermally conductive insulating layer 30, contact area reaches optimum, further plays the insulation of thermally conductive insulating layer 30, heat conduction and water-proof function.Semiconductor waterstop 40 improves the defect that thermally conductive insulating layer 30 causes insulating properties to be deteriorated in a humidity environment further.Metal inner sheath 50 not only has the effect that its internal equipment of protection is injury-free, and metal inner sheath 50 also has excellent heat conductivity, can be passed in time by the heat within metal inner sheath 50；The copper material casting of metal inner sheath 50 preferably excellent thermal conductivity forms.
Owing to thermally conductive insulating layer 30, metal inner sheath 50 have excellent heat conductivity, the heat produced when conventional sense lower wire bundle 22 works easily is distributed.The material of main part of heat conduction protective layer 60 is polythene material; many " product " shape tinsels 61 inlayed in heat conduction protective layer 60; and the tip of tinsel 61 contacts with buffer protection set 70; the tail end of tinsel 61 contacts the structure forming this " tip dissipates outwardly " with metal inner sheath 50, and more conducively heat dissipates outwardly；When strand 22 works for a long time at operating temperature is more than 90 DEG C; or during because cable run causes operating temperature extremely more than 150 DEG C; heat quick, timely can must be transmitted along the direction of strand 22, thermally conductive insulating layer 30, metal inner sheath 50, heat conduction protective layer 60, dissipate by heat conduction protective layer 60; this process is irreversible; therefore radiating efficiency is high; heat-transfer effect is good, it is to avoid heat accumulates in the inside of cable and makes cable cause strand 22 to expand skew, deform and even damage under the effect of high temperature.
For convenience of processing and the installation of tinsel 61, described tinsel 61 is made up of three metal monofilament 611 arranged in " product " shape, is integral type structure between adjacent metal monofilament 611.Three one-body molded tinsels 61 making to make of metal monofilament 611 form similar " triangular prism " structure, define, between adjacent metal monofilament 611, the chase caved inward, expand contact area, and beneficially heat quickly transmits.When mounted, whichever contacts this kind of tinsel 61 with metal inner sheath 50, and its tip will necessarily be made to contact with buffer protection set 70, reduces and embeds tinsel 61, the work difficulty of processing heat conduction protective layer 60.Tinsel 61 also has the effect of reinforcement and armouring.
Owing to the girth of next top 202 is more than being provided with gap between the girth of upper top 201, adjacent crosslinked polyetylene insulated set 20, thermally conductive insulating layer 30 is made to form the structure of " inner small and outside big ", dual function in conjunction with " product " shape tinsel 61, when cable is laid under the conditions of ambient temperature is less than 0 DEG C, need not heat in advance, cable to lay drop unrestricted.
As it is shown on figure 3, the probability that the external force being subject to for reducing crosslinked polyetylene insulated set 20 further offsets；It is provided with a plurality of first convex tendon 2031 on described right side 203, between the first adjacent convex tendon 2031, is provided with gap；It is provided with a plurality of second convex tendon 2041 on described left side 204, between the second adjacent convex tendon 2041, is provided with gap.Under the effect of the first convex tendon 2031 and the second convex tendon 2041, not only increase contact area between the thermally conductive insulating layer after solidification 30 and first convex tendon the 2031, second convex tendon 2041, improve the adhesion between crosslinked polyetylene insulated set 20 and thermally conductive insulating layer 30 so that the probability offset during the external force that crosslinked polyetylene insulated set 20 is subject to reduces further.
When the bearing of trend of described first convex tendon 2031 is vertical with the radial direction of crosslinked polyetylene insulated set 20, when the bearing of trend of described second convex tendon 2041 is vertical with the radial direction of crosslinked polyetylene insulated set 20, the resistance that crosslinked polyetylene insulated set 20 moves in thermally conductive insulating layer 30 reaches maximum, reduces crosslinked polyetylene insulated set 20 further and issues the probability of raw skew in external force.
For further enhancing the adhesion between metal inner sheath 50 and heat conduction protective layer 60, heat conduction protective layer 60 and buffer protection set 70, it is to avoid misplace during use, offset；The outer surface of described metal inner sheath 50 is provided with multiple triangle fin 501, and the inner surface of described buffer protection set 70 is provided with the arc groove 72 matched in multiple and tinsel 61 tip, and the outer surface of buffer protection set 70 is provided with spiral type the 3rd convex tendon 71.Chase tabling bottom triangle fin 501 and tinsel 61 so that combine between metal inner sheath 50 and heat conduction protective layer 60 is more firm, is additionally favorable for heat and quickly transmits at most advanced and sophisticated position.Arc groove 72 matches with the tip of tinsel 61 so that combine between buffer protection set 70 and heat conduction protective layer 60 is more firm, is additionally favorable for heat and quickly transmits at most advanced and sophisticated position.Arc groove 72 also has the wear rate reduced between tinsel 61 and buffer protection set 70.
For convenience of machine-shaping and subsequent installation, it is integral type structure between described fin 501 and metal inner sheath 50, is integral type structure between the 3rd convex tendon 71 and buffer protection set 70.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (6)
1. a cross-linked polyethylene insulated cable, it is characterized in that: include centrally located locating core (10), four groups of crosslinked polyetylene insulated sets (20), tubular metal inner sheath (50), tubular buffer protection set (70), tubular oversheath (80), locating core (10) is arranged on the central authorities of metal inner sheath (50), four groups of crosslinked polyetylene insulated sets (20) are arranged at the inside of metal inner sheath (50) and four groups of crosslinked polyetylene insulated sets (20) are symmetrically distributed in the surrounding of locating core (10), it is provided with gap between adjacent crosslinked polyetylene insulated set (20), metal inner sheath (50) is arranged on the inside of buffer protection set (70), buffer protection set (70) is arranged on the inside of oversheath (80)；The edge of described locating core (10) is symmetrically arranged with four arc positioning grooves (11)；Upper top (201) that described crosslinked polyetylene insulated set (20) includes matching with locating slot (11), arc next top (202), right side (203), left side (204), the girth of next top (202) is more than the girth of upper top (201), and right side (203) and left side (204) are mutually perpendicular to；The inside of described crosslinked polyetylene insulated set (20) is filled with strand (22), and strand (22) is crushed to by multiple conducting wires, and the outside of strand (22) is provided with one layer by protection band (21) fully wrapped around for strand (22)；Being filled with one layer of thermally conductive insulating layer (30) between described metal inner sheath (50) and four groups of crosslinked polyetylene insulated sets (20), the outer surface of thermally conductive insulating layer (30) is provided with one layer by semiconductor waterstop (40) fully wrapped around for thermally conductive insulating layer (30)；It is provided with heat conduction protective layer (60) between described metal inner sheath (50) and buffer protection set (70); many " product " shape tinsels (61) it are inlaid with in heat conduction protective layer (60); the tip of tinsel (61) contacts with buffer protection set (70), and the tail end of tinsel (61) contacts with metal inner sheath (50).
A kind of cross-linked polyethylene insulated cable the most according to claim 1, it is characterised in that: it is provided with a plurality of first convex tendon (2031) on described right side (203), between adjacent the first convex tendon (2031), is provided with gap；It is provided with a plurality of second convex tendon (2041) on described left side (204), between adjacent the second convex tendon (2041), is provided with gap.
A kind of cross-linked polyethylene insulated cable the most according to claim 2, it is characterized in that: the bearing of trend of described first convex tendon (2031) is vertical with the radial direction of crosslinked polyetylene insulated set (20), the bearing of trend of described second convex tendon (2041) is vertical with the radial direction of crosslinked polyetylene insulated set (20).
A kind of cross-linked polyethylene insulated cable the most according to claim 1, it is characterised in that: described tinsel (61) is made up of three metal monofilament (611) arranged in " product " shape, is integral type structure between adjacent metal monofilament (611).
A kind of cross-linked polyethylene insulated cable the most according to claim 1; it is characterized in that: the outer surface of described metal inner sheath (50) is provided with multiple triangle fin (501); the inner surface of described buffer protection set (70) is provided with the arc groove (72) matched in multiple and tinsel (61) tip, and the outer surface of buffer protection set (70) is provided with spiral type the 3rd convex tendon (71).
A kind of cross-linked polyethylene insulated cable the most according to claim 5, it is characterised in that: it is integral type structure between described fin (501) and metal inner sheath (50), is integral type structure between the 3rd convex tendon (71) and buffer protection set (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260196.2U CN205487399U (en) | 2016-03-31 | 2016-03-31 | Crosslinked polyethylene insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260196.2U CN205487399U (en) | 2016-03-31 | 2016-03-31 | Crosslinked polyethylene insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205487399U true CN205487399U (en) | 2016-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620260196.2U Withdrawn - After Issue CN205487399U (en) | 2016-03-31 | 2016-03-31 | Crosslinked polyethylene insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205487399U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679439A (en) * | 2016-03-31 | 2016-06-15 | 宁国市明福线缆有限公司 | Cross-linked polyethylene insulated cable |
-
2016
- 2016-03-31 CN CN201620260196.2U patent/CN205487399U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679439A (en) * | 2016-03-31 | 2016-06-15 | 宁国市明福线缆有限公司 | Cross-linked polyethylene insulated cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20170426 |