CN214476602U

CN214476602U - Crosslinked polyethylene insulated cable

Info

Publication number: CN214476602U
Application number: CN202120380704.1U
Authority: CN
Inventors: 彭辉
Original assignee: Anhui Huadong Cable Technology Co ltd
Current assignee: Anhui Huadong Cable Technology Co ltd
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2021-10-22
Anticipated expiration: 2031-02-19

Abstract

The utility model discloses a crosslinked polyethylene insulated cable, its technical scheme main points are: the fireproof cable comprises a plurality of cable cores, wherein the cable cores are mutually twisted, the cable cores sequentially comprise cable core conductors, fire-resistant mica tapes and insulating layers from inside to outside, a wrapping tape layer is arranged on the outer side of each cable core, an elastic supporting tube is arranged in the middle of each cable core, a first filler is arranged in the middle of each elastic supporting tube, a second filler is filled in a gap between each cable core and the wrapping tape layer, a plurality of tensile ropes are arranged inside the second filler, a fireproof layer is arranged on the outer side of the wrapping tape layer, the fireproof layer consists of two layers of copper alloy tapes and a fireproof tape arranged between the two layers of copper alloy tapes, the fireproof tape is ceramic silicon rubber, a shielding layer is arranged on the outer side of the fireproof layer, an armor layer is arranged on the outer side of the shielding layer, and a sheath layer is extruded on the outer side of the armor layer; the utility model discloses have good fire prevention, fire resistance, anti extrusion is stronger with pull resistance simultaneously.

Description

Crosslinked polyethylene insulated cable

Technical Field

The utility model belongs to the technical field of the cable technique and specifically relates to a crosslinked polyethylene insulated cable.

Background

Along with the frequent occurrence of fire accidents, people continuously deepen the understanding of the fire hazard risk of the electric wire and the cable, the requirements of relevant departments on the fire resistance, the flame retardance and the like of the electric wire and the cable are higher and higher, and the cable fire has the characteristics of quick spread, difficulty in putting out a fire, secondary harm generation, long recovery time and the like, which bring great loss to national economy and lives and properties of people, so that people put forward more rigorous operating conditions on the flame resistance, the fire resistance and the safety reliability of the electric wire and the cable, such as strong fire resistance, explosion resistance and overload capacity and long service life, under the fire condition, a fire elevator and a fire pump need to keep normal operation for a certain time, the cable has special requirements of low smoke, low halogen and low toxicity after combustion, even no smoke, no toxicity and the like, the flame resistance and the fire prevention measures of the cable are important means for reducing the fire ignition and flame delay of the cable, and the key point is that the fire prevention is mainly performed on various flame-retardant cables, Fire-resistant cables and fireproof cables are widely used.

Most of the existing insulated cables have poor fire resistance and flame retardance; meanwhile, the existing insulated cable has poor extrusion resistance, and when the cable is extruded, the cable core inside the cable is easy to damage due to extrusion; and current insulated cable tensile strength is not good, and the workman drags the cable inlet wire at the in-process of erectting the cable, causes the damage of cable easily, influences the normal use of cable.

SUMMERY OF THE UTILITY MODEL

To the problem mentioned in the background art, the utility model aims at providing a crosslinked polyethylene insulated cable has good fire prevention, fire resistance, and anti extrusion is stronger with the pull resistance simultaneously.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a crosslinked polyethylene insulated cable comprises a plurality of cable cores, wherein the cable cores are mutually twisted, the cable cores sequentially comprise a cable core conductor, a fire-resistant mica tape and an insulating layer from inside to outside, a wrapping tape layer is arranged on the outer side of the cable core, an elastic supporting tube is arranged in the middle of the plurality of cable cores and is made of natural rubber, a first filler is arranged in the middle of the elastic supporting tube and is calcium carbonate, a second filler is filled in a gap between the cable core and the wrapping tape layer and is an inorganic mineral paper rope, a plurality of tensile ropes are arranged in the second filler and are made of core aramid fiber materials, a fireproof layer is arranged on the outer side of the wrapping tape layer and consists of two layers of copper alloy tapes and a fireproof tape arranged between the two layers of copper alloy tapes, the fireproof belt is made of ceramic silicon rubber, a shielding layer is arranged on the outer side of the fireproof layer, an armor layer is arranged on the outer side of the shielding layer, and a sheath layer is extruded on the outer side of the armor layer.

Furthermore, the cable core conductor is made of annealed copper wires, a tin coating is arranged on the outer side of each copper wire, and the thickness of the tin coating is 1 mm.

By adopting the technical scheme, the tin-plated layer can improve the insulating property of the copper conductor, and the current in each copper conductor is ensured not to interfere.

Furthermore, the insulating layer is made of cross-linked polyethylene materials in an extrusion wrapping mode.

Through adopting above-mentioned technical scheme, the insulating layer adopts the cross-linked polyethylene material to make and has good electric insulation effect between each cable core, and the cross-linked polyethylene is a flexibility, high mechanical strength, the good ultrapure insulating material of electrical property, has higher insulation resistance constant as insulating material, can bear higher voltage level, guarantees simultaneously that the cable has excellent insulating nature, and the cross-linked polyethylene in case what take place the cable burning produces is carbon dioxide and water, possesses the low smoke characteristic of no halogen.

Furthermore, the wrapping tape layer is made of glass fiber tapes, and the wrapping and covering rate is not less than 15%.

By adopting the technical scheme, the glass fiber belt has higher fire resistance.

Furthermore, the shielding layer is formed by mixing and weaving tinned copper wires and an aluminum foil composite belt, and the weaving coverage rate of the shielding layer is not less than 85%.

By adopting the technical scheme, the cable has good capability of shielding external electromagnetic signal interference.

Furthermore, the armor layer is formed by weaving galvanized steel wires, and the armor layer is provided with two layers.

Through adopting above-mentioned technical scheme, can strengthen tensile mechanical properties and the corrosion resistance of cable.

Furthermore, the sheath layer is made of halogen-free low-smoke flame-retardant polyolefin sheath material.

By adopting the technical scheme, the cable has stronger flame retardant property.

To sum up, the utility model discloses mainly have following beneficial effect:

1. according to the utility model, the fire-resistant mica tape is arranged outside the cable core conductor, the fire-resistant mica tape has excellent high temperature resistance and combustion resistance, and the volatilization of harmful smoke is basically avoided when the fire-resistant mica tape is burnt in case of naked fire; the fireproof layer is arranged and consists of two layers of copper alloy strips and a fireproof strip, the copper alloy strips are high in melting point and good in flame retardance, the fireproof strip is made of ceramic silicon rubber, the ceramic silicon rubber has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, residues after combustion are hard ceramic shells, and hard shells are not melted and do not drip in a fire environment and are good fireproof materials.

2. The utility model discloses a, through being provided with the elasticity stay tube in the inside of cable core, the elasticity stay tube adopts the natural rubber material to make, and natural rubber has good elasticity, and when the cable core received the extrusion, the elasticity stay tube can play certain buffering, absorbing function for the cable core, has improved the anti extrudability of cable.

3. The utility model discloses a, through being provided with many tensile ropes in the inside of cable, the tensile rope is made for core aramid fiber material, is a novel high-tech synthetic fiber, has excellent properties such as superhigh strength, high temperature resistant, light in weight, and toughness is 2 times of steel wire, still has good insulating nature and ageing resistance, and the tensile strength that can be convenient for strengthen the cable prevents that the cable core from the condition of disconnected core appears at the in-process of dragging.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a cable core; 101. a cable core conductor; 102. fire-resistant mica tapes; 103. an insulating layer; 2. wrapping a belt layer; 3. an elastic support tube; 4. a first filler; 5. a second filler; 6. a tensile strand; 7. a fire barrier layer; 701. a copper alloy strip; 702. a fire-retardant band; 8. a shielding layer; 9. an armor layer; 10. a sheath layer.

Detailed Description

In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, a cross-linked polyethylene insulated cable comprises a plurality of cable cores 1, the plurality of cable cores 1 are twisted with each other, the cable cores 1 sequentially comprise a cable core conductor 101, a fire-resistant mica tape 102 and an insulating layer 103 from inside to outside, a wrapping tape layer 2 is arranged on the outer side of each cable core 1, an elastic support tube 3 is arranged in the middle of each cable core 1, the elastic support tube 3 is made of natural rubber, a first filler 4 is arranged in the middle of the elastic support tube 3, the first filler 4 is calcium carbonate, the melting point of the calcium carbonate is high, the elastic support tube 3 is provided with calcium carbonate to improve the flame retardance inside the cable, a second filler 5 is filled in a gap between each cable core 1 and the corresponding wrapping tape layer 2, the second filler 5 is an inorganic mineral paper rope, a plurality of tensile ropes 6 are arranged inside the second filler 5, and the tensile ropes 6 are made of aramid fiber material, be provided with flame retardant coating 7 around the outside of band layer 2, flame retardant coating 7 comprises two-layer copper alloy area 701 and the fire prevention area 702 of setting between two-layer copper alloy area 701, fire prevention area 702 is ceramic silicon rubber, ceramic silicon rubber has characteristics such as splendid fire prevention, fire-retardant, low smoke, nontoxic, and extrusion moulding simple process, the outside of flame retardant coating 7 is provided with shielding layer 8, shielding layer 8's the outside is provided with armor 9, armor 9's the crowded package in the outside has restrictive coating 10.

Referring to fig. 1, the cable core conductor 101 is made of annealed copper wire, and a tin-plated layer is disposed on the outer side of the copper wire, and the thickness of the tin-plated layer is 1 mm.

Referring to fig. 1, the insulating layer 103 is made of an extruded cross-linked polyethylene material.

Referring to fig. 1, the lapping tape layer 2 is made of glass fiber tapes, and the lapping and covering rate is not less than 15%.

Referring to fig. 1, the shielding layer 8 is formed by weaving a composite tape of a tinned copper wire and an aluminum foil in a mixed manner, and the weaving coverage rate of the shielding layer 8 is not less than 85%.

Referring to fig. 1, the armor layer 9 is formed by weaving galvanized steel wires, and the armor layer 9 is provided with two layers.

Referring to fig. 1, the sheath layer 10 is made of a halogen-free low-smoke flame-retardant polyolefin sheath material.

When the utility model is used, when the fire-resistant fireproof copper alloy belt is burnt in open fire, harmful smoke basically does not volatilize, the melting point of the copper alloy belt 701 is higher, the copper alloy belt has good fire resistance, the fireproof belt 702 is made of ceramic silicon rubber, the ceramic silicon rubber has the characteristics of excellent fire resistance, low smoke, no toxicity and the like, the residue after the combustion is a hard ceramic shell, and the hard shell is not melted and dropped in a fire environment and is a good fireproof material; the elastic supporting tube 3 is made of natural rubber materials, the natural rubber has good elasticity, and when the cable core 1 is extruded, the elastic supporting tube 3 can play a certain role in buffering and damping the cable core 1, so that the extrusion resistance of the cable is improved; tensile rope 6 is made for core aramid fiber material, is a novel high-tech synthetic fiber, and the tensile strength that can be convenient for strengthen the cable prevents that disconnected core's condition from appearing at the in-process that drags in cable core 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a crosslinked polyethylene insulated cable, includes many cable cores (1), its characterized in that: the cable comprises a plurality of cable cores (1) which are mutually twisted, wherein each cable core (1) sequentially comprises a core conductor (101), a fire-resistant mica tape (102) and an insulating layer (103) from inside to outside, a wrapping tape layer (2) is arranged on the outer side of each cable core (1), an elastic supporting tube (3) is arranged in the middle of each cable core (1), the elastic supporting tube (3) is made of natural rubber, a first filler (4) is arranged in the middle of each elastic supporting tube (3), the first filler (4) is calcium carbonate, a second filler (5) is filled in a gap between each cable core (1) and the corresponding wrapping tape layer (2), the second filler (5) is an inorganic mineral paper rope, a plurality of tensile ropes (6) are arranged inside each second filler (5), and the tensile ropes (6) are made of core aramid fiber materials, the outside of winding band layer (2) is provided with flame retardant coating (7), flame retardant coating (7) are two-layer copper alloy area (701) and set up two-layerly fire retardant coating (702) between copper alloy area (701) are constituteed, fire retardant coating (702) are ceramic silicon rubber, the outside of flame retardant coating (7) is provided with shielding layer (8), the outside of shielding layer (8) is provided with armor (9), crowded package in the outside of armor (9) has restrictive coating (10).

2. A crosslinked polyethylene insulated cable according to claim 1, characterized in that: the cable core conductor (101) is made of annealed copper wires, a tin coating is arranged on the outer side of each copper wire, and the thickness of the tin coating is 1 mm.

3. A crosslinked polyethylene insulated cable according to claim 1, characterized in that: the insulating layer (103) is made of cross-linked polyethylene materials in an extrusion wrapping mode.

4. A crosslinked polyethylene insulated cable according to claim 1, characterized in that: the wrapping tape layer (2) is made of glass fiber tapes, and the wrapping and covering rate is not less than 15%.

5. A crosslinked polyethylene insulated cable according to claim 1, characterized in that: the shielding layer (8) is formed by mixing and weaving tinned copper wires and aluminum foil composite tapes, and the weaving coverage rate of the shielding layer (8) is not less than 85%.

6. A crosslinked polyethylene insulated cable according to claim 1, characterized in that: the armor layer (9) is formed by weaving galvanized steel wires, and the armor layer (9) is provided with two layers.

7. A crosslinked polyethylene insulated cable according to claim 1, characterized in that: the sheath layer (10) is made of a halogen-free low-smoke flame-retardant polyolefin sheath material.