Power cable with chlorinated polyethylene sheath

Abstract

The utility model discloses a power cable with a chlorinated polyethylene sheath, which comprises a cable core, the cable core comprises at least six wire cores and a filling layer, a mica tape wrapping layer is arranged outside the cable core, the mica tape wrapping layer is spirally wound outside the cable core, a lining layer is arranged outside the mica tape wrapping layer, and the filling layer is arranged outside the lining layer. The power cable comprises a mica tape wrapping layer, a lining layer is arranged outside the mica tape wrapping layer, the lining layer is attached to the mica tape wrapping layer, a composite fireproof layer is arranged outside the lining layer, an armor layer is arranged outside the composite fireproof layer, an outer sheath is arranged outside the armor layer, and the outer sheath and the armor layer are formed through extrusion. Meanwhile, the outer sheath is prepared by blending butadiene rubber and nitrile rubber, and nano magnesium oxide and nano aluminum oxide are mixed in the outer sheath, so that the sheath has a series of excellent physical and chemical properties, and the use effect of the power cable sheath is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power cable technical field, concretely is a kind of power cable of chlorinated polyethylene sheath. BACKGROUND

[0002] Cable is a kind of electric energy or signal transmission device, usually is by several or several groups of wires, each group of wire is mutually insulated, and is often twisted around a center, the whole outside is covered with highly insulated covering layer, cable has the characteristics of internal power-on and external insulation, power cable is the cable product for transmission and distribution of high-power electric energy, is widely used in urban underground power network, power station outgoing line, internal power supply of industrial and mining enterprises and underwater power transmission line crossing river and sea etc. Cable sheath is an important part to protect cable from external damage, usually made of high molecular functional material, cable sheath must be able to protect the inner and outer conductors and insulation layer of cable from the influence of environment, climate, acid, hydrolysis, chlorinated polyethylene (CPE) is made of polyethylene modified by chlorination, the main chain is saturated structure, side chain contains a certain number of chlorine atom polar substituent group, in the use process, chlorinated polyethylene has good oil resistance, weather resistance, flame retardance etc., these excellent properties make chlorinated polyethylene gradually replace traditional chlorosulfonated polyethylene etc., become one of the main raw materials of cable sheath.

[0003] Chinese patent publication number CN217640770U, authorized announcement day is October 21, 2022, a kind of chlorinated polyethylene sheath power cable, including multiple cable core wires, multiple cable core wires are uniformly distributed in circular array, multiple cable core wires are covered with inner sheath outside, multiple cable core wires and the inner sheath between evenly arranged multiple buffer cavities, the inside of buffer cavity is uniformly fixed and connected with multiple buffer blocks, the inside of inner sheath is uniformly provided with multiple heat conduction grooves, the inside of multiple heat conduction grooves is fixedly connected with heat conduction column, the outside of heat conduction column is uniformly fixed and connected with multiple heat conduction plates, heat conduction groove is communicated with the inside of buffer cavity through multiple heat conduction holes, the outside of inner sheath is covered with shielding braid layer, the outside of shielding braid layer is covered with heat-resistant insulation layer, the outside of heat-resistant insulation layer is covered with waterproof layer, the outside of waterproof layer is uniformly provided with multiple heat conduction rings;It can cool cable, improve the service life of power cable.

[0004] Existing chlorinated polyethylene will cooperate with a large amount of inorganic filler, change the vulcanization performance, physical and mechanical properties and thermal properties etc. of rubber material, inorganic filler has hydrophilic oleophobicity, poor dispersibility in rubber material, easy to absorb moisture and deteriorate in mixing process, easy to form aggregate in rubber material, reduce the use effect of power cable sheath, can not satisfy the using requirement. UTILITY MODEL CONTENT

[0005] The utility model discloses a purpose lies in providing a kind of chlorinated polyethylene sheath's power cable to solve the problem that chlorinated polyethylene is used with a large amount of inorganic filler in the above background art, changes the vulcanization performance, physical mechanical properties and thermal properties etc.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of chlorinated polyethylene sheath's power cable, including cable core, the cable core includes wire core and filling layer, wire core is provided with at least six strands, the outside of the cable core is provided with mica tape wrapping layer, and mica tape wrapping layer is spirally wound outside the cable core, the outside of the mica tape wrapping layer is provided with inner liner, and inner liner is attached with mica tape wrapping layer, the outside of the inner liner is provided with composite fire resistance layer, the outside of the composite fire resistance layer is provided with armored layer, the outside of the armored layer is provided with outer sheath, and outer sheath is formed by extrusion coating between the armored layer.

[0007] Preferably, the wire core includes conductor, shielding layer and insulating layer, and the conductor is stranded by multiple copper wires, the shielding layer is arranged outside the conductor, the insulating layer is arranged outside the shielding layer, and the shielding layer and the insulating layer are sequentially extrusion formed outside the conductor.

[0008] Preferably, the filling layer is arranged at the gap between the wire core, and the wire core is circularly and equidistantly arranged inside the cable core.

[0009] Preferably, the composite fire resistance layer includes first fire resistance layer and second fire resistance layer, the second fire resistance layer is arranged outside the first fire resistance layer, the first fire resistance layer is attached with the inner liner, and the second fire resistance layer is attached with the armored layer.

[0010] Preferably, the inside of the outer sheath is provided with nanoparticles, and the nanoparticles are integrated with the outer sheath.

[0011] Preferably, the outer wall of the outer sheath is coated with wear-resistant coating.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a device through the setting of outer sheath, nano particle and wear -resisting coating, outer sheath is with chlorinated polyethylene as main material, simultaneously and cis -polybutadiene and nitrile rubber blend and is made, chlorinated polyethylene is a kind of saturated high molecular material, its appearance is white powder, non-toxic and odorless, has a series of excellent physical and chemical properties, nano particle is nano magnesium oxide and nano aluminium oxide, itself has crystallization water, in the case of high temperature, crystallization water volatilization endotherm, reduce the temperature of cable whole, further improve the flame retardant property of cable, wear -resisting coating uses polyurethane coating, and polyurethane is a kind of polymer material, has excellent physical mechanics performance, wear resistance, cold resistance and chemical corrosion resistance etc., improves the service life of power cable;

[0014] The utility model discloses a device through the setting of composite fire -resistant layer, and the composite fire -resistant layer is by first fire -resistant layer and second fire -resistant layer constitutes double -deck structure, and first fire -resistant layer adopts ceramic silicon rubber, and ceramic silicon rubber is a kind of new high molecular fire -resistant material, has the characteristics such as excellent fire -retardant, flame -retardant, low smoke, non -toxic, can form hard ceramic shell under high temperature, effectively prevent flame spread, protect internal wire and cable from being damaged, in the combustion process, the smoke amount that ceramic silicon rubber generates is little, and smoke is non -toxic, is favorable to reduce the personnel casualty in fire, can bear high temperature environment, ensure still can keep stable performance under extreme conditions, and second fire -resistant layer adopts glass wool, and glass wool is made of glass, has very strong high temperature resistance, corrosion -resistant performance, simultaneously also has good heat -insulating and moisture -proof performance, and durability is very good. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic diagram of the utility model;

[0016] Figure 2 It is the section view of the utility model;

[0017] Figure 3 It is the Figure 2 A area local enlarged view of the utility model;

[0018] Figure 4 It is the composite fire -resistant layer, armoring layer and outer sheath connecting structure diagram of the utility model.

[0019] In the drawing: 1, cable core;2, wire core;3, composite fire -resistant layer;4, armoring layer;5, outer sheath;6, filling layer;7, nano particle;8, inner lining;9, conductor;10, shielding layer;11, insulating layer;12, mica tape wrapping layer;13, wear -resisting coating;14, first fire -resistant layer;15, second fire -resistant layer. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments.

[0021] Please refer to Figures 1-4 The utility model provides an embodiment: a kind of chlorinated polyethylene sheath power cable, including cable core 1, cable core 1 includes wire core 2 and filling layer 6, wire core 2 is provided with at least six strands, the outside of cable core 1 is provided with mica tape wrapping layer 12, and mica tape wrapping layer 12 is spirally wound in the outside of cable core 1, the outside of mica tape wrapping layer 12 is provided with inner liner 8, and inner liner 8 is attached with mica tape wrapping layer 12, the outside of inner liner 8 is provided with composite fire resistance layer 3, the outside of composite fire resistance layer 3 is provided with armoring layer 4, the outside of armoring layer 4 is provided with outer sheath 5, and outer sheath 5 is formed by extrusion coating between armoring layer 4, wire core 2 includes conductor 9, shielding layer 10 and insulating layer 11, and conductor 9 is twisted by multiple copper wires, shielding layer 10 is arranged in the outside of conductor 9, insulating layer 11 is arranged in the outside of shielding layer 10, and shielding layer 10 and insulating layer 11 are sequentially formed by extrusion coating in the outside of conductor 9, filling layer 6 is arranged at the gap between wire core 2, and wire core 2 is circularly equidistantly arranged in the inside of cable core 1, outer sheath 5 is mainly made of chlorinated polyethylene, is simultaneously blended with cis-butadiene rubber and nitrile rubber, chlorinated polyethylene is a kind of saturated high molecular material, appearance is white powder, non-toxic and odorless, has a series of excellent physical and chemical properties, such as good weather resistance, ozone resistance, chemical resistance, aging resistance, oil resistance, flame resistance, coloring performance, toughness and compatibility, improve the use effect of power cable.

[0022] Please refer to Figure 1 , Figure 2 And Figure 4 Composite fire resistance layer 3 includes first fire resistance layer 14 and second fire resistance layer 15, second fire resistance layer 15 is arranged in the outside of first fire resistance layer 14, first fire resistance layer 14 is attached with inner liner 8, second fire resistance layer 15 is attached with armoring layer 4, first fire resistance layer 14 uses ceramicized silicone rubber, ceramicized silicone rubber is a kind of new high molecular fireproof material, has the characteristics of excellent fire prevention, flame retardation, low smoke, non-toxic, etc., can form hard ceramic shell under high temperature, effectively prevent flame from spreading, protect internal wire and cable from being damaged, during combustion, the amount of smoke generated by ceramicized silicone rubber is extremely small, and the smoke is non-toxic, which is beneficial to reduce personnel casualties in fire, can withstand high temperature environment, ensure that it can still maintain stable performance under extreme conditions, second fire resistance layer 15 uses glass wool, glass wool is made of glass, has very strong high-temperature resistance, corrosion resistance, and also has good heat insulation and moisture-proof performance, and good durability.

[0023] Please refer to Figure 1 AndFigure 4 The inside of the outer sheath 5 is provided with nanoparticles 7, and the nanoparticles 7 are integrated with the outer sheath 5, the outer wall of the outer sheath 5 is coated with a wear-resistant coating 13, the nanoparticles 7 are nanometer magnesium oxide and nanometer aluminum oxide, which have crystal water, and the crystal water volatilizes and absorbs heat under high temperature, thereby reducing the overall temperature of the cable and further improving the flame-retardant performance of the cable, and the wear-resistant coating 13 adopts polyurethane paint, and the polyurethane is a polymer material, which has excellent physical and mechanical properties, wear resistance, cold resistance and chemical corrosion resistance.

[0024] The contents not described in detail in the specification belong to the prior art known to the person skilled in the art.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A power cable with a chlorinated polyethylene sheath, comprising a core (1), characterised in that: The cable core (1) comprises a core (2) and a filling layer (6), the core (2) is provided with at least six strands, an outer part of the cable core (1) is provided with a mica tape wrapping layer (12), the mica tape wrapping layer (12) is spirally wound on the outer part of the cable core (1), an outer part of the mica tape wrapping layer (12) is provided with an inner lining layer (8), the inner lining layer (8) is attached to the mica tape wrapping layer (12), an outer part of the inner lining layer (8) is provided with a composite fire-resistant layer (3), an outer part of the composite fire-resistant layer (3) is provided with an armor layer (4), an outer part of the armor layer (4) is provided with an outer sheath (5), and the outer sheath (5) and the armor layer (4) are formed by extrusion.

2. A power cable with a chlorinated polyethylene sheath according to claim 1, characterized in that: The core (2) comprises a conductor (9), a shielding layer (10) and an insulation layer (11), the conductor (9) is twisted by a plurality of copper wires, the shielding layer (10) is arranged on the outer part of the conductor (9), and the insulation layer (11) is arranged on the outer part of the shielding layer (10), and the shielding layer (10) and the insulation layer (11) are sequentially formed by extrusion on the outer part of the conductor (9).

3. A power cable with a chlorinated polyethylene sheath according to claim 1, characterized in that: The filling layer (6) is arranged at the gap between the cores (2), and the cores (2) are arranged in a circular manner at equal intervals in the inner part of the cable core (1).

4. A power cable with a chlorinated polyethylene sheath according to claim 1, characterized in that: The composite fire-resistant layer (3) comprises a first fire-resistant layer (14) and a second fire-resistant layer (15), the second fire-resistant layer (15) is arranged on the outer part of the first fire-resistant layer (14), the first fire-resistant layer (14) is attached to the inner lining layer (8), and the second fire-resistant layer (15) is attached to the armor layer (4).

5. A power cable with a chlorinated polyethylene jacket according to claim 1, characterized in that: The outer wall of the outer sheath (5) is coated with a wear-resistant coating (13).

Images