CN214410846U - Ethylene-propylene rubber insulation high-flexibility tensile cable - Google Patents
Ethylene-propylene rubber insulation high-flexibility tensile cable Download PDFInfo
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- CN214410846U CN214410846U CN202120270688.0U CN202120270688U CN214410846U CN 214410846 U CN214410846 U CN 214410846U CN 202120270688 U CN202120270688 U CN 202120270688U CN 214410846 U CN214410846 U CN 214410846U
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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
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- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model relates to the field of cables, a high-flexibility tensile cable of ethylene-propylene rubber insulation is disclosed, including cable core, outer reinforcing braid and restrictive coating, the cable core includes reinforcing wire rope and two at least group, the outer cladding of reinforcing wire rope has ethylene-propylene rubber insulating layer, the group spiral twines on reinforcing wire rope, every group includes interior reinforcing braid, interior polyester belt layer and two at least mutual stranded insulation core from outside to inside in proper order; the outer reinforcing woven layer and the inner reinforcing woven layer are formed by weaving polyester yarns and copper wires in a staggered mode. In the utility model, the reinforced steel wire rope and the inner and outer reinforced braided layers share most of the mechanical external force and the dead weight of the cable, the load born by the insulated wire core is reduced, and the tensile resistance of the cable in the scheme is improved; the flexibility of the inner and outer reinforced braided layers is effectively improved by adding the polyester yarns, and the ethylene-propylene rubber insulating layer has high elasticity, so that the deformation recovery of the cable is facilitated, the flexibility of the cable is further improved, and the service life of the cable is prolonged.
Description
Technical Field
The utility model relates to a cable field, concretely relates to insulating high flexible tensile type cable of EP rubbers.
Background
The cable is widely applied in the fields of modern infrastructure, digital interconnection, rail transit, information transmission and the like, and the application scenes and the application requirements are different. When the cable is laid in a cable shaft, lifting equipment and other occasions with large vertical fall for use, the cable bears large longitudinal tensile load and sometimes needs to reciprocate up and down along with the equipment. This requires that the cable not only have greater longitudinal tensile properties, but also have high flexibility to avoid cable failure due to greater mechanical loads and fatigue damage.
Currently, polyethylene, crosslinked polyethylene, polyvinyl chloride, silicone rubber, and the like are generally used as an insulating layer in cables on the market. However, polyethylene and polyvinyl chloride are thermoplastic materials, and creep deformation is easily caused under the action of long-term current load and longitudinal tensile load, so that the phenomena of insulation cracking, breaking, thinning and the like are caused; the crosslinked polyethylene has high hardness and is easy to generate fatigue cracking in long-term reciprocating motion; silicone rubber is relatively flexible, but has relatively low strength and poor tear resistance, and is easily broken under a longitudinal tensile load. The insulation level of the cable can be reduced under the conditions, even the short circuit breakdown phenomenon is caused, and the service life of the cable is directly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides an insulating high flexible tensile type cable of ethylene-propylene rubber to the poor problem of pull resistance and compliance appears in the cable of laying the use under the solution to the big vertical fall condition.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the ethylene-propylene rubber insulation high-flexibility tensile cable comprises a cable core, an outer reinforcing weaving layer and a sheath layer which are sequentially arranged from inside to outside, wherein the cable core comprises a reinforcing steel wire rope and at least two wire groups, an ethylene-propylene rubber insulation layer is coated outside the reinforcing steel wire rope, the wire groups are spirally wound on the reinforcing steel wire rope, and each wire group sequentially comprises an inner reinforcing weaving layer, an inner polyester belt layer and at least two insulation wire cores which are twisted with each other from outside to inside; the outer reinforcing woven layer and the inner reinforcing woven layer are formed by weaving polyester yarns and copper wires in a staggered mode.
The principle and the advantages of the scheme are as follows: in the scheme, the wire group is spirally wound on the reinforced steel wire rope, so that when the cable is subjected to axial tension, the reinforced steel wire rope can share most of mechanical external force and dead weight of the cable; simultaneously, interior reinforcing weaving layer and outer reinforcing weaving layer can further share mechanical external force and cable dead weight, reduce the load that insulating core bore, improve the tensile resistance of cable in this scheme. And because outer reinforcing weaving layer and interior reinforcing weaving layer are crisscross by dacron silk and copper wire and weave and form, and the addition of dacron silk can effectively improve the compliance of inside and outside reinforcing weaving layer, and then improves the compliance of cable, can cushion some impact forces in the cable reciprocating motion, plays certain guard action to the insulation core, and has reduced the dead weight of cable simultaneously.
Moreover, in the scheme, the ethylene-propylene rubber insulating layer has excellent flexibility, high elasticity and high mechanical strength, and after the external force is cancelled, the insulating deformation is recovered due to the high elasticity of the ethylene-propylene rubber insulating layer; meanwhile, the ethylene-propylene rubber insulating layer has a polymer mesh structure, which is beneficial to keeping the insulating property of the ethylene-propylene rubber insulating layer stable, avoiding the insulation creep damage or fatigue cracking caused by the long-term reciprocating motion of the cable and prolonging the service life of the cable.
In conclusion, the scheme improves the tensile property and the flexibility of the cable, has stable insulating property, and avoids the insulation creep damage or fatigue cracking caused by the long-term reciprocating motion of the cable, so that the cable can be laid under the condition of large vertical fall for use, and the service life of the cable is longer.
Preferably, as a refinement, the insulated wire core comprises a conductor and an insulating layer coated outside the conductor.
In this scheme, insulating core includes the conductor and the insulating layer of cladding outside the conductor, avoids insulating core's conductor to take the in situ mutual contact of polyester band including.
Preferably, as an improvement, the insulating layer is formed by extruding ethylene propylene rubber.
In the scheme, the insulating layer coated outside the conductor is formed by extruding the ethylene-propylene rubber which has excellent flexibility, high elasticity and high mechanical property, and the deformation is easy to recover; and the inside of the insulating core is provided with a polymer net structure, which is beneficial to keeping the stability of the insulating property of the insulating core, avoiding the insulation creep damage or fatigue cracking caused by the long-term reciprocating motion of the insulating core and prolonging the service life of the insulating core.
Preferably, as an improvement, the sheath layer is formed by extruding chlorosulfonated polyethylene rubber.
In the scheme, the sheath layer is formed by extruding chlorosulfonated polyethylene rubber, and the chlorosulfonated polyethylene rubber has the characteristics of high mechanical strength, high flexibility and the like, can bear larger mechanical external force in vertical laying and reciprocating motion, and plays a role in protecting an internal cable core; and the chlorosulfonated polyethylene rubber also has excellent oil resistance, weather aging resistance and acid and alkali resistance, is suitable for complex working conditions such as lifting equipment and a cable shaft, avoids the influence of chemical corrosion and oil immersion on the internal structure of the cable, and ensures the long-term stable operation of the cable.
Preferably, as an improvement, the cable core further comprises an outer polyester tape layer, and the outer polyester tape layer is wrapped around the periphery of the wire group spirally wound on the reinforcing steel wire rope.
The polyester tape has high mechanical strength, excellent insulating property, high temperature resistance and low temperature resistance, and is an ideal wrapping material. Therefore, in this scheme, not only set up interior polyester band layer, still set up outer polyester band layer to the life of cable in this scheme is further prolonged.
Preferably, as an improvement, the wire set further includes a plurality of steel wires, and the steel wires and the insulated wire cores are twisted with each other.
In this scheme, when the cable atress, steel wire in the group can share a partion mechanical external force to further alleviate the load that insulated wire core bore, and, the steel wire has the compliance, and is very little to the holistic compliance influence of cable behind the steel wire interpolation in the group.
Preferably, as an improvement, the reinforcing steel wire rope is provided with a plurality of spiral grooves along the axial direction in the circumferential direction, and the spiral grooves can accommodate parts of the wire groups.
In this scheme, set up the spiral groove on strengthening wire rope, then, when group spiral winding was on strengthening wire rope, the part of group can be absorbed in the spiral groove to when making the cable receive axial tension, the spiral groove can exert the holding power to the group, further alleviates the mechanical external force that the group bore.
Drawings
Fig. 1 is a radial cross-sectional view of an ethylene-propylene rubber insulated high-flexibility tensile cable in an embodiment of the present invention;
fig. 2 is a radial cross-sectional view of an ethylene-propylene rubber insulated high-flexibility tensile cable in the third embodiment of the present invention;
fig. 3 is a radial cross-sectional view of an ethylene-propylene rubber insulated high-flexibility tensile cable in the fourth embodiment of the present invention;
fig. 4 is a radial cross-sectional view of a reinforced steel wire rope in the fourth embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the cable comprises an outer polyester tape layer 1, an outer reinforcing woven layer 2, a sheath layer 3, a reinforcing steel wire rope 4, a spiral groove 401, a wire group 5, an inner reinforcing woven layer 501, an inner polyester tape layer 502, an insulating wire core 503, a conductor 5031, an insulating layer 5032, an ethylene propylene rubber insulating layer 6 and a steel wire 7.
Example one
This embodiment is substantially as shown in fig. 1: ethylene-propylene rubber insulation high flexibility tensile type cable includes cable core, outer reinforcing weaving layer 2 and restrictive coating 3 that from interior to exterior set gradually, and in this embodiment, restrictive coating 3 is formed by chlorosulfonated polyethylene rubber package.
The cable core comprises an outer polyester belt layer 1, a strong steel wire rope 4 and at least two wire groups 5, wherein an ethylene-propylene rubber insulating layer 6 is coated outside the reinforced steel wire rope 4, the wire groups 5 are spirally wound on the reinforced steel wire rope 4, and the outer polyester belt layer 1 is wound on the periphery of the wire groups 5 after the wire groups 5 are spirally wound on the reinforced steel wire rope 4. In the present embodiment, the number of the wire groups 5 is four. Each wire group 5 sequentially comprises an inner reinforcing braid 501, an inner polyester tape layer 502 and at least two mutually twisted insulated wire cores 503 from outside to inside, and in this embodiment, the number of the insulated wire cores 503 is two. The insulated wire core 503 includes a conductor 5031 and an insulating layer 5032 covering the conductor 5031, in this embodiment, the insulating layer 5032 is formed by extruding ethylene propylene rubber. The outer reinforcing braided layer 2 and the inner reinforcing braided layer 501 are formed by interweaving polyester yarns and copper wires.
In this embodiment, since the wire group 5 is spirally wound on the reinforcing steel wire rope 4, when the cable is subjected to an axial tensile force, the reinforcing steel wire rope 4 shares most of the mechanical external force and the dead weight of the cable; meanwhile, the inner reinforcing braided layer 501 and the outer reinforcing braided layer 2 can further share mechanical external force and dead weight of the cable, load borne by the insulating wire core 503 is reduced, and tensile resistance of the cable in the embodiment is improved. And, because outer braided layer 2 and interior braided layer 501 are woven by dacron silk and copper wire are crisscross to form, and the addition of dacron silk can effectively improve the compliance of interior braided layer 501 and outer braided layer 2 of strengthening, and then improves the compliance of cable, can cushion some impact forces in the cable reciprocating motion, play certain guard action to insulating sinle silk 503, and can reduce the dead weight of cable simultaneously.
Moreover, in this embodiment, the ethylene-propylene rubber insulating layer 6 and the insulating layer 5032 have excellent flexibility, high elasticity and high mechanical strength, and after the external force is removed, the insulating deformation is recovered due to the high elasticity of the ethylene-propylene rubber insulating layer 6 and the insulating layer 5032; meanwhile, the ethylene-propylene rubber insulation layer 6 has a polymer mesh structure, which is beneficial to keeping the insulation performance stable, avoiding insulation creep damage or fatigue cracking caused by long-term reciprocating motion of the cable, and prolonging the service life of the cable.
Moreover, the sheath layer 3 is formed by extruding chlorosulfonated polyethylene rubber, and the chlorosulfonated polyethylene rubber has the characteristics of high mechanical strength, high flexibility and the like, can bear larger mechanical external force in vertical laying and reciprocating motion, and plays a role in protecting the internal cable core; and the chlorosulfonated polyethylene rubber also has excellent oil resistance, weather aging resistance and acid and alkali resistance, is suitable for complex working conditions such as lifting equipment and a cable shaft, avoids the influence of chemical corrosion and oil immersion on the internal structure of the cable, and ensures the long-term stable operation of the cable.
In conclusion, the scheme improves the tensile property and the flexibility of the cable, has stable insulating property, and avoids the insulation creep damage or fatigue cracking caused by the long-term reciprocating motion of the cable, so that the cable can be laid under the condition of large vertical fall for use, and the service life of the cable is longer.
In addition, the ethylene-propylene rubber insulated high-flexibility tensile cable in the embodiment can be used for vertical laying at the height of less than 300 meters and passes 2000 drag chain tests specified by 2PfG 2577/08.16. In addition, after the ethylene propylene rubber insulated high-flexibility tensile cable in the embodiment is soaked in water with the water temperature of 20 ℃ and the water pressure of 5kPa for 240h (the end is exposed out of the water), no breakdown phenomenon occurs after a 1500V voltage test.
Example two
The difference between the present embodiment and the first embodiment is: in the wire group 5 in this embodiment, the number of the insulated wire cores 503 is three.
Third embodiment
The difference between the present embodiment and the first embodiment is: as shown in fig. 2, the wire set 5 further includes a plurality of steel wires 7, the steel wires 7 are twisted with the insulated wire core 503, in this embodiment, the number of the steel wires 7 is two.
In this embodiment, the wire group 5 further includes the steel wire 7, and the steel wire 7 has flexibility and high mechanical strength, so that the steel wire 7 can share a part of mechanical external force when the cable is stressed, the load borne by the insulated wire core 503 is further reduced, and the influence on the overall flexibility of the cable is very small.
Example four
The present embodiment is different from the third embodiment in that: as shown in fig. 3 and 4, the reinforcing steel cord 4 is provided with a plurality of spiral grooves 401 along the axial direction in the circumferential direction, the spiral grooves 401 can accommodate part of the cord groups 5, the number of the spiral grooves 401 is the same as that of the cord groups 5, and in the embodiment, the number of the spiral grooves 401 is four.
In this embodiment, since the circumferential direction of the reinforcing steel wire rope 4 has the spiral groove 401, when the wire group 5 is wound on the reinforcing steel wire rope 4, a part of the wire group 5 (a part of the inner reinforcing braid 501) will be sunk into the corresponding spiral groove 401, so that when the cable is subjected to an axial tensile force, the spiral groove 401 can apply a supporting force to the wire group 5, thereby further reducing a mechanical external force borne by the wire group 5, and further improving the tensile resistance of the cable in this embodiment.
The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. Ethylene-propylene rubber insulation high flexibility tensile type cable, its characterized in that: the cable comprises a cable core, an outer reinforcing weaving layer and a sheath layer which are sequentially arranged from inside to outside, wherein the cable core comprises a reinforcing steel wire rope and at least two wire groups, an ethylene-propylene rubber insulating layer is coated outside the reinforcing steel wire rope, the wire groups are spirally wound on the reinforcing steel wire rope, and each wire group sequentially comprises an inner reinforcing weaving layer, an inner polyester belt layer and at least two insulating wire cores which are twisted with each other from outside to inside; the outer reinforcing woven layer and the inner reinforcing woven layer are formed by weaving polyester yarns and copper wires in a staggered mode.
2. The ethylene-propylene rubber insulated high-flexibility tensile cable according to claim 1, characterized in that: the insulated wire core comprises a conductor and an insulated layer coated outside the conductor.
3. The ethylene-propylene rubber insulated high-flexibility tensile cable according to claim 2, characterized in that: the insulating layer is formed by extruding ethylene propylene rubbers.
4. The ethylene-propylene rubber insulated high-flexibility tensile cable according to claim 3, characterized in that: the sheath layer is formed by extruding chlorosulfonated polyethylene rubber.
5. The ethylene-propylene rubber insulated high-flexibility tensile cable according to claim 4, characterized in that: the cable core further comprises an outer polyester tape layer, and the outer polyester tape layer is wound and wrapped on the periphery of the wire group spirally wound on the reinforced steel wire rope.
6. The ethylene-propylene rubber insulated high-flexibility tensile cable according to claim 5, characterized in that: the wire group further comprises a plurality of steel wires, and the steel wires and the insulated wire cores are mutually twisted.
7. The ethylene-propylene rubber insulated high-flexibility tensile cable according to claim 6, characterized in that: the circumferential direction of the reinforced steel wire rope is axially provided with a plurality of spiral grooves, and the spiral grooves can contain parts of the wire group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120270688.0U CN214410846U (en) | 2021-01-29 | 2021-01-29 | Ethylene-propylene rubber insulation high-flexibility tensile cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120270688.0U CN214410846U (en) | 2021-01-29 | 2021-01-29 | Ethylene-propylene rubber insulation high-flexibility tensile cable |
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| Publication Number | Publication Date |
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| CN214410846U true CN214410846U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120270688.0U Active CN214410846U (en) | 2021-01-29 | 2021-01-29 | Ethylene-propylene rubber insulation high-flexibility tensile cable |
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2021
- 2021-01-29 CN CN202120270688.0U patent/CN214410846U/en active Active
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