CN214226584U

CN214226584U - Corrosion-resistant cable

Info

Publication number: CN214226584U
Application number: CN202120288340.4U
Authority: CN
Inventors: 李俊超; 陶瑞祥; 沈佳龙; 佟阳阳; 张浩然
Original assignee: Zhejiang Chint Electric Cable Co ltd
Current assignee: Zhejiang Chint Electric Cable Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-09-17
Anticipated expiration: 2031-02-01

Abstract

The application relates to the technical field of cable preparation, in particular to a corrosion-resistant cable which comprises a cable core protective sleeve, a cable filling rope and a combined protective sleeve, wherein the cable core protective sleeve is coated on the circumference of a cable core; the cable filling rope is filled in the combined type protective sleeve and is contacted with the cable core protective sleeve; the combined protective sleeve comprises an elastic inner layer, a puncture-resistant composite net layer, a filling layer and a polyimide outer layer, wherein the puncture-resistant composite net layer is compounded on the outer wall of the elastic inner layer; the filling layer is compounded on the outer wall of the puncture-resistant composite net layer; the polyimide outer layer is compounded on the outer wall of the filling layer. The cable core protection device has better corrosion resistance, mechanical property and protection capability, and can effectively protect the cable core.

Description

Corrosion-resistant cable

Technical Field

The application relates to the technical field of cable preparation, in particular to a corrosion-resistant cable.

Background

The power cable plays a role of 'channels' in power transmission and has been widely used at home and abroad. The power cable is used for transmitting and distributing electric energy and is widely applied to urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and the like.

Referring to fig. 1, the related medium voltage power cable is generally composed of a core 11, a sheath 12, a filler cord 13, and a protective layer 14, and the core 11, the sheath 12, and the filler cord 13 are all disposed within the protective layer 14. The sheath 12 is coated on the circumference of the cable core 11; the filling rope 13 is filled in the protective layer 14, so that the cable core of the optical cable is relatively round, and the stability of the optical cable structure can be ensured. The filler cord 13 is filled in contact with the sheath 12 covering the cable core 11. The sheath 12 is made of PVC leather sheath, the filling rope 13 is made of polyethylene foam or polyethylene foam, and the protective layer 14 is generally made of PVC protective sleeve or polyethylene protective sleeve.

The above prior art solutions have the following drawbacks: the environment that the cable is located is comparatively complicated, easily receives external environment corruption, oxidation destruction, and current polyvinyl chloride protective sheath or polyethylene protective sheath, corrosion resistance is relatively poor, and the protective capacities to the cable core is relatively weak.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that the corrosion resistance is poor and the protection capability of a cable core is poor in the prior art, the application aims to provide the corrosion-resistant cable.

The application purpose of the application is realized by the following technical scheme:

a corrosion-resistant cable comprises a cable core protective sleeve, a cable filling rope and a combined protective sleeve, wherein the cable core protective sleeve is coated on the circumference of a cable core; the cable filling rope is filled in the combined type protective sleeve and is contacted with the cable core protective sleeve; the combined protective sleeve comprises an elastic inner layer, a puncture-resistant composite net layer, a filling layer and a polyimide outer layer, wherein the puncture-resistant composite net layer is compounded on the outer wall of the elastic inner layer; the filling layer is compounded on the outer wall of the puncture-resistant composite net layer; the polyimide outer layer is compounded on the outer wall of the filling layer.

By adopting the technical scheme, the combined protective sleeve has better shock absorption performance and sealing performance due to better air sealing and shock absorption of the elastic inner layer; the puncture-resistant composite mesh layer has a good effect of resisting puncture of sharp objects; the polyimide outer layer has better fire resistance, insulating property, heat resistance, chemical stability, wearability, resistant radiation and resistant solvent, can guarantee that combination formula protective sheath has better corrosion resistance and mechanical properties, consequently, this application has better corrosion resistance and mechanical properties, can effectively protect the cable core, has promoted the protective capacities to the cable core.

Preferably, the cable core protective sleeve comprises a polyimide inner layer, an anti-corrosion net intermediate layer and a heat shrinkable tube outer layer, wherein the polyimide inner layer is compounded in the circumferential direction of the cable core; the middle layer of the corrosion-resistant net is compounded on the circumference of the polyimide inner layer; the outer layer of the heat-shrinkable tube is compounded on the periphery of the middle layer of the anti-corrosion net.

Through adopting above-mentioned technical scheme, the polyimide inlayer has better fire resistance, insulating nature, heat resistance, chemical stability, wearability, resistant radiation and resistant solvent, and anticorrosive net intermediate level further promotes the corrosion resisting property of cable core protective sheath, and the pyrocondensation pipe skin makes the cable core protective sheath combine inseparabler, can carry out better protection to the cable core.

Preferably, the combined protective sleeve further comprises a PET aluminized film layer, and the PET aluminized film layer is compounded between the puncture-resistant composite net layer and the filling layer.

Through adopting above-mentioned technical scheme, the reinforcing of PET aluminizing film layer is to the intensity of reflection of heat radiation, and under the broken extreme condition in fire-retardant top layer, the PET aluminizer can play better fire-retardant thermal-insulated effect, further strengthens the fire behaviour of this application.

Preferably, the puncture-resistant composite net layer is woven by warps and wefts, and the warp and weft density of the puncture-resistant composite net layer is 240-320 pieces/cm; the warp and weft of the puncture-resistant composite net layer are the same; the warp of the puncture-resistant composite net layer comprises glass fiber threads and aramid fiber threads which are arranged at intervals.

By adopting the technical scheme, the aramid fiber line modifies the glass fiber line, so that the puncture-resistant composite net layer with toughness, puncture resistance and good flame retardance is obtained, and the protection capability of the cable core by the cable is improved.

Preferably, the puncture-resistant composite mesh layer is impregnated and rolled to form a polyurethane waterproof layer.

By adopting the technical scheme, the flexibility of the puncture-resistant composite net layer is improved by the polyurethane waterproof layer, and the processing is convenient; and the polyurethane waterproof layer can also play a waterproof role.

Preferably, the elastic inner layer comprises a butyl rubber main body and a PVC coating layer, and a plurality of cavities are integrally formed in the butyl rubber main body; the distance between the adjacent cavities is equal; the butyl rubber main body is provided with an injection hole communicated with the cavity; the cavity is filled with a high water absorption resin layer; the PVC coating film layer is compounded on the surface of the butyl rubber main body provided with the injection hole.

Through adopting above-mentioned technical scheme, evenly distributed can play better effect of blocking water in the super absorbent resin layer in the butyl rubber main part, can promote this application to the protective capacities of cable core.

Preferably, the filling layer comprises an inner fluororubber layer, a polyethylene foam layer and an outer fluororubber layer, and the polyethylene foam layer is compounded between the polyethylene foam layer and the outer fluororubber layer.

Through adopting above-mentioned technical scheme, the outer layer of fluororubber inlayer and fluororubber has better corrosion resistance and resilience, and the polyethylene foaming layer plays the filling effect and has better fire resistance, corrosion resistance simultaneously, consequently, the filling layer can promote holistic fire resistance, corrosion resistance and shock-absorbing capacity.

Preferably, the cable filling rope comprises a core wire and a composite protective layer coated on the circumferential direction of the core wire, wherein the core wire is formed by twisting the following fibers: flame-retardant cotton threads, polyphenylene sulfide sulfone fibers and nylon; the composite protective layer comprises a reinforced braid and a PVC heat-shrinkable sleeve layer, and the reinforced braid is spirally wound around the circumferential direction of the core wire along the axial direction of the core wire; the PVC heat-shrinkable sleeve layer is compounded on the outer wall of the reinforced braid; the structure of the reinforced braid is the same as that of the puncture-resistant composite mesh layer.

By adopting the technical scheme, the cable filling rope enables the cable core of the optical cable to be relatively round and round, the stability of the optical cable structure can be ensured, the core wire prepared from the flame-retardant cotton wire, the polyphenylene sulfide sulfone fiber and the nylon has better flame retardance, wear resistance and corrosion resistance, and the composite protective layer prepared from the reinforced braid and the PVC heat-shrinkable sleeve layer has better puncture resistance, so that the cable core can be better protected.

Preferably, the outer polyimide layer is sprayed outwards to form a flame-retardant coating and a polytetrafluoroethylene coating in sequence.

By adopting the technical scheme, the flame-retardant coating can further improve the overall flame retardance, and the polytetrafluoroethylene coating can improve the corrosion resistance and has the anti-adhesion effect, so that the protection capability of the cable core is further improved.

In summary, the present application has the following advantages:

1. this application adopts the combination formula protective sheath of elasticity inlayer, resistant compound stratum reticulare of puncturing, filling layer and the outer preparation of polyimide to have better corrosion resistance and mechanical properties, can effectively protect the cable core, has promoted the protective capacities to the cable core.

2. The utility model provides a filling layer adopts fluororubber inlayer, polyethylene foaming layer and the outer preparation of fluororubber, has played the filling effect and has given better corrosion resistance and fire resistance of filling layer simultaneously to further promote holistic corrosion resistance and fire resistance.

Drawings

Fig. 1 is a schematic diagram of a phase technology cable construction.

Fig. 2 is a schematic overall structure diagram of an embodiment in the present application.

Fig. 3 is a schematic structural view of a combined protective sheath according to an embodiment of the present application.

FIG. 4 is a schematic representation of the construction of a puncture resistant composite web layer in an embodiment of the present application.

Figure 5 is a schematic structural diagram of a cable core protective sleeve and a cable core in an embodiment of the application.

Fig. 6 is a schematic structural diagram of a cable filling rope in an embodiment of the present application.

In the figure, 1, a cable core protective sleeve; 10. a polyimide inner layer; 100. an intermediate layer of corrosion resistant mesh; 101. an outer layer of a heat-shrinkable tube; 11. a cable core; 12. a sheath; 13. filling a rope; 14. a protective layer; 2. a cable filler cord; 21. a core wire; 22. compounding a protective layer; 221. reinforcing the woven tape; 222. a PVC heat-shrinkable sleeve layer; 3. a combined protective sleeve; 31. an elastic inner layer; 311. a butyl rubber body; 312. a PVC coating film layer; 313. a cavity; 314. an injection hole; 315. a super absorbent resin layer; 32. a puncture-resistant composite mesh layer; 321. a glass fiber thread; 322. aramid fiber yarn; 33. a filling layer; 331. an inner layer of fluororubber; 332. a polyethylene foam layer; 333. an outer layer of fluororubber; 34. an outer polyimide layer; 341. a flame retardant coating; 342. a polytetrafluoroethylene coating; 35. a PET aluminized film layer; 36. a polyurethane waterproof layer.

Detailed Description

The present application is described in further detail below with reference to figures 2-6.

Referring to fig. 2, for the corrosion-resistant cable that this application disclosed, including cable core 11, cable filler rope 2 and combination formula

protective sheath

3, 11 outer wall claddings of every cable core have cable core protective sheath 1. The cable filling rope 2 is abutted with the cable core protective sleeve 1 coated with the cable core 11 and is positioned in the combined protective sleeve 3.

Referring to fig. 3, the combined protective sheath 3 is composed of an elastic inner layer 31, a puncture-resistant composite mesh layer 32, a filling layer 33, a polyimide outer layer 34 and a PET aluminizing film layer 35.

Referring to fig. 3, the elastic inner layer 31 serves as an innermost layer of the combined type protection cover 3, and has waterproof and shock-absorbing effects. The elastic inner layer 31 comprises a butyl rubber main body 311 with good sealing performance, a plurality of cavities 313 which are mutually spaced are integrally formed in the butyl rubber main body 311, the space between every two adjacent cavities 313 is equal, and the cavities 313 are distributed in the butyl rubber main body 311 in a dot matrix mode. The cavity 313 is filled with the super absorbent resin layer 315, which has a good water blocking effect. In order to facilitate the addition of the super absorbent resin into the cavity 313, the butyl rubber body 311 is provided with an injection hole 314 communicating with the cavity 313, and the super absorbent resin powder is injected into the cavity through the injection hole 314. In order to prevent the super absorbent resin from flowing out of the injection hole 314, a PVC cover film layer 312 is adhered to the surface of the butyl rubber body 311 having the injection hole 314 opened therein by glue.

Referring to fig. 3 and 4, the puncture-resistant composite web layer 32 is bonded to the outer wall of the elastic inner layer 31 by hot melt adhesive, thereby achieving a good puncture-resistant effect. The puncture-resistant composite web layer 32 is a woven fabric woven from warp and weft. The warp density of the puncture-resistant composite net layer 32 is 260 pieces/10 cm, the warp density of the puncture-resistant composite net layer 32 is 130 pieces/10 cm, and the weft density of the puncture-resistant composite net layer 32 is 130 pieces/10 cm. The warp and weft of the puncture-resistant composite web layer 32 have the same composition, and taking the warp of the puncture-resistant composite web layer 32 as an example, the warp of the puncture-resistant composite web layer 32 includes glass fiber yarns 321 and aramid fiber yarns 322 which are arranged at intervals. Aramid fiber line 322 is modified glass fiber line 321 and is obtained the puncture-resistant composite net layer that has toughness and puncture resistance, fire resistance are better, promote this application to the protective capacities of cable core. In order to further improve the toughness of the puncture-resistant composite web layer 32, the puncture-resistant composite web layer 32 is impregnated and rolled with a polyurethane waterproof layer 36. The polyurethane waterproof layer 36 is made of TPU resin, and can achieve toughening and waterproof effects.

Referring to fig. 3, the PET aluminized film layer 35 is bonded to the outer wall of the puncture-resistant composite net layer 32 through hot melt adhesive, and when the filling layer 33 is broken, the PET aluminized film layer 35 can play a good flame-retardant role, so that the protection effect on the cable core 11 is improved. The filling layer 33 is bonded on the outer wall of the PET aluminized film layer 35 through hot melt adhesive, so that the filling effect is achieved, and the integral protective performance is enhanced. The filling layer 33 is composed of a fluororubber inner layer 331, a polyethylene foam layer 332 and a fluororubber outer layer 333, the upper and lower surfaces of the polyethylene foam layer 332 are coated with hot melt adhesive, the fluororubber inner layer 331 is adhered to the lower surface of the polyethylene foam layer 332, and the fluororubber outer layer 333 is adhered to the upper surface of the polyethylene foam layer 332.

Referring to fig. 3, the outer polyimide layer 34 is bonded to the outer wall of the outer fluororubber layer 333 by hot melt adhesive, and the outer polyimide layer 34 has better solvent resistance, radiation resistance, chemical stability and corrosion resistance. In order to enhance the overall protection effect, the outer polyimide layer 34 is coated with a flame retardant coating and a polytetrafluoroethylene coating in sequence to form a flame retardant coating 341 capable of improving the overall flame retardancy and a polytetrafluoroethylene coating 342 capable of improving the overall corrosion resistance.

Referring to fig. 5, when the combined protective sleeve 3 is broken, the cable core protective sleeve 1 can protect the cable core 11. The specific structure of the cable core protective sleeve 1 is as follows: the cable core protective sleeve 1 is composed of a polyimide inner layer 10, a corrosion-resistant net middle layer 100 and a heat shrinkable tube outer layer 101. The polyimide inner layer 10 is coated on the circumference of the cable core 11, and the polyimide inner layer 10 is flame-retardant, wear-resistant, stable in chemical performance, good in mechanical strength and capable of protecting the cable core 11 well. The structure of the corrosion-resistant net intermediate layer 100 is the same as that of the puncture-resistant composite net layer 32, and the corrosion-resistant net intermediate layer is compounded on the polyimide inner layer 10 in the circumferential direction to play a good protection role in corrosion resistance and puncture resistance. The outer layer 101 of the heat shrinkable tube is a PVC heat shrinkable tube, and the outer layer 101 of the heat shrinkable tube is wrapped on the periphery of the middle layer 100 of the anti-corrosion net in a heat shrinkable mode, so that the cable core protective sleeve 1 is compact in structure and can well protect the cable core 11.

Referring to fig. 6, the cable filler cord 2 also protects the cable core 11. The cable filling rope 2 has the following structure: the cable filler rope 2 is composed of a core wire 21 and a composite protective layer 22 covering the core wire 21 in the circumferential direction. The core wire 21 is formed by twisting flame-retardant cotton threads, polyphenylene sulfide sulfone fibers and nylon 66, and has good flame retardance and wear resistance. After the outer wall of the core wire 21 is coated with the hot melt adhesive, the composite protective layer 22 is compounded, so that the gap inside the cable filling rope 2 can be reduced, and the inside of the cable filling rope 2 is more compact. The composite protective layer 22 comprises a reinforcing braid 221 with the same structure as that of the puncture-resistant composite mesh layer 32, and the reinforcing braid 221 is spirally wound around the circumferential direction of the core wire 21 along the axial direction of the core wire 21. In order to make the interior of the cable filling rope 2 more compact, the outer layer of the reinforcing braid 221 is coated with glue and heat-shrunk with a PVC heat-shrinkable sleeve layer 222.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A corrosion-resistant cable comprises a cable core (11), and is characterized in that: the cable core protection sleeve (1) is coated on the circumference of the cable core (11); the cable filling rope (2) is filled in the combined protective sleeve (3) and is contacted with the cable core protective sleeve (1); the combined protective sleeve (3) comprises an elastic inner layer (31), a puncture-resistant composite net layer (32), a filling layer (33) and a polyimide outer layer (34), wherein the puncture-resistant composite net layer (32) is compounded on the outer wall of the elastic inner layer (31); the filling layer (33) is compounded on the outer wall of the puncture-resistant composite net layer (32); the outer polyimide layer (34) is compounded on the outer wall of the filling layer (33).

2. A corrosion resistant cable according to claim 1, wherein: the cable core protective sleeve (1) comprises a polyimide inner layer (10), an anti-corrosion net middle layer (100) and a heat shrinkable tube outer layer (101), wherein the polyimide inner layer (10) is compounded in the circumferential direction of the cable core (11); the anti-corrosion net middle layer (100) is compounded on the periphery of the polyimide inner layer (10); the outer layer (101) of the heat-shrinkable tube is compounded on the circumference of the middle layer (100) of the anti-corrosion net.

3. A corrosion resistant cable according to claim 1, wherein: the combined protective sleeve (3) further comprises a PET aluminized film layer (35), and the PET aluminized film layer (35) is compounded between the puncture-resistant composite net layer (32) and the filling layer (33).

4. A corrosion resistant cable according to claim 1 or 3, wherein: the puncture-resistant composite net layer (32) is woven by warps and wefts; the warp and weft density of the puncture-resistant composite net layer (32) is 240-320 pieces/10 cm; the warp and weft of the puncture-resistant composite net layer (32) are the same; the warp of the puncture-resistant composite mesh layer (32) comprises glass fiber threads (321) and aramid fiber threads (322) which are arranged at intervals.

5. A corrosion resistant cable according to claim 4, wherein: the puncture-resistant composite net layer (32) is impregnated and pressed to form a polyurethane waterproof layer (36).

6. A corrosion resistant cable according to claim 1, wherein: the elastic inner layer (31) comprises a butyl rubber main body (311) and a PVC coating layer (312), and a plurality of cavities (313) are integrally formed in the butyl rubber main body (311); the spacing between adjacent cavities (313) is equal; the butyl rubber main body (311) is provided with an injection hole (314) communicated with the cavity (313); the cavity (313) is filled with a high water absorption resin layer (315); the PVC coating layer (312) is compounded on the surface of the butyl rubber main body (311) provided with the injection hole (314).

7. A corrosion resistant cable according to claim 1, wherein: the filling layer (33) comprises a fluororubber inner layer (331), a polyethylene foaming layer (332) and a fluororubber outer layer (333), and the polyethylene foaming layer (332) is compounded between the polyethylene foaming layer (332) and the fluororubber outer layer (333).

8. A corrosion resistant cable according to claim 5, wherein: the cable filling rope (2) comprises a core wire (21) and a composite protective layer (22) coated on the circumferential direction of the core wire (21), wherein the core wire (21) is formed by twisting the following fibers: flame-retardant cotton, polyphenylene sulfide sulfone fiber and nylon 66; the composite protective layer (22) comprises a reinforced braid (221) and a PVC heat-shrinkable sleeve layer (222), and the reinforced braid (221) is spirally wound on the circumferential direction of the core wire (21) along the axial direction of the core wire (21); the PVC heat-shrinkable sleeve layer (222) is compounded on the outer wall of the reinforced braid (221); the reinforcing webbing (221) has the same structure as the puncture-resistant composite web layer (32).

9. A corrosion resistant cable according to claim 1, wherein: the outer polyimide layer (34) is sprayed outwards in sequence to form a flame-retardant coating (341) and a polytetrafluoroethylene coating (342).