CN214624517U - Flame-retardant direct current cable - Google Patents

Abstract

The utility model discloses a flame-retardant direct current cable, which comprises a conductor, the conductor is externally wrapped with an insulating layer, the insulating layer is externally wrapped with a waterproof layer, the waterproof layer is externally wrapped with a flame-retardant layer, the flame-retardant layer is externally wrapped with a protective layer, the insulating layer adopts a powder filling structure, the waterproof layer adopts a metal protective layer, the flame-retardant layer adopts ceramic silicon rubber material, the flame-retardant layer adopts halogen-free flame-retardant material, the protective layer is divided into an outer protective layer and an inner protective layer, the inner protective layer is externally wrapped with the outer protective layer, the outer protective layer is divided into an inner lining layer, an armor layer and an outer tegument layer, the inner lining layer is externally wrapped with the armor layer, the armor layer is externally wrapped with the outer tegument layer, the utility model discloses a plurality of materials are utilized, so that the flame-retardant cable has more characteristics, the cable is safer in use and longer in service life.

Description

Flame-retardant direct current cable

Technical Field

The utility model relates to the technical field of cables, the concrete field is a fire-retardant direct current cable.

Background

The burning of the cable is due to the generation of flammable gas by external heating, and to achieve the purpose of flame retardance, three factors causing the burning must be suppressed, namely: combustible gases, heat and oxygen. Therefore, the flame-retardant electric wire and cable generally adopts a method of adding halide containing halogen and metal oxide into a sheath material, and the method is an excellent method from the perspective of flame retardance, but because the materials contain halide and release a large amount of smoke and hydrogen halide gas during combustion, the visibility during fire is low, so that people are greatly hindered from safe evacuation and fire fighting, and people are more choked to death by toxic gas.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire-retardant DC cable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fire-retardant direct current cable, includes the conductor, the outside parcel of conductor has the insulating layer, the outside parcel of insulating layer has the waterproof layer, the outside parcel of waterproof layer has the flame retardant coating, the outside parcel of flame retardant coating has fire-retardant layer, the outside parcel on fire-retardant layer has the sheath, the sheath divide into outer jacket and interior sheath, interior sheath is located the outside on fire-retardant layer, the outside of interior sheath is wrapped up by the outer jacket, the outer jacket divide into inner liner, armor and outer tegument, the inner liner is located the outside of interior sheath, the outside parcel of inner liner has the armor, the outside parcel of armor has outer tegument.

Preferably, the insulating layer adopts a powder-filled structure.

Preferably, the waterproof layer adopts a metal sheath layer.

Preferably, the fire-resistant layer is made of ceramic silicon rubber.

Preferably, the flame-retardant layer is made of a halogen-free flame-retardant material.

Preferably, the inner liner is formed by wrapping three layers of cable paper, the armor layer is formed by weaving steel wires, and the outer layer is made of hard polyvinyl chloride.

Preferably, be equipped with the shielding layer between insulating layer and the waterproof layer, the shielding layer divide into internal shield layer and external shield layer, the internal shield layer is located the outside of insulating layer, the outside parcel external shield layer on internal shield layer, the internal shield layer adopts the semiconductor paper material, the external shield layer adopts weaves the copper tape.

Compared with the prior art, the beneficial effects of the utility model are that: a flame-retarding DC cable features that when the DC cable is in a low position, the insulating layer can prevent the transmitted current from leaking to external environment and the electric power of cable from injuring external objects or surrounding personnel, and the insulating layer can protect the personnel in DC cable from being hurt by electric power Damp, seepage outflow, effect such as corruption, the utility model discloses an utilize multiple material, make flame retarded cable possess more characteristics, make the cable safer when using, life is longer.

Drawings

Fig. 1 is a schematic view of a front view internal structure of embodiment 1 of the present invention;

fig. 2 is an enlarged view of a point a in fig. 1 according to the present invention;

fig. 3 is an enlarged view of the position B in fig. 1 according to the present invention;

fig. 4 is a schematic view of the internal structure of embodiment 2 of the present invention;

fig. 5 is an enlarged view of the point C in fig. 4 according to the present invention.

In the figure: 1-conductor, 2-insulating layer, 3-waterproof layer, 4-flame-retardant layer, 5-flame-retardant layer, 6-protective layer, 601-outer protective layer, 6011-lining layer, 6012-armor layer, 6013-outer covering layer, 602-inner protective layer, 7-shielding layer, 701-inner shielding layer and 702-outer shielding layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-3, the present invention provides a technical solution: a flame-retardant direct current cable comprises a conductor 1, high-voltage power can be transported through the conductor 1, the higher the voltage is, the lower the current is under the condition of the same power transmission of the high-voltage power, so that the higher the voltage is, the higher the current is, the current during power transmission can be reduced, the heat loss caused by the current is reduced, and the material cost of remote power transmission is reduced, an insulating layer 2 is wrapped outside the conductor 1, when the position of the direct current cable is lower, the insulating layer can ensure that the transmitted current does not leak to the outside, the power of the cable can also prevent the external things or surrounding personnel from being injured, personnel around the direct current cable can be protected through the insulating layer 2, the personnel around the direct current cable can be prevented from being injured by the power, a waterproof layer 3 is wrapped outside the insulating layer 2, the waterproof layer 3 has a waterproof function, the water is prevented from permeating into the cable and contacting with the conductor 1 to influence the transportation of the power, and a flame-retardant layer 4 is wrapped outside the waterproof layer 3, when a cable catches fire, the fire-resistant layer 4 can guarantee a certain time, the transmission of electric power can still be guaranteed, personnel can be safely evacuated, the fire-resistant layer 4 is wrapped with the flame-resistant layer 5, in case of fire of the cable, the combustion can be limited in a local range without spreading, other various devices are protected, and larger loss is avoided, the flame-resistant layer 5 is wrapped with the protective layer 6, the cable can be protected from mechanical damage, dampness, seepage outflow, corrosion and the like by the protective layer 6, the protective layer 6 is divided into the outer protective layer 601 and the inner protective layer 602, the inner protective layer 602 is positioned outside the flame-resistant layer 5, the insulating layer 2 can be prevented from being damped and the insulating layer 2 can not be damaged mechanically by the inner protective layer 602, the outer part of the inner protective layer 602 is wrapped by the outer protective layer 601, the inner protective layer 601 is protected from mechanical damage and chemical corrosion by the outer protective layer 601, and the mechanical strength is enhanced, the outer protective layer 601 is divided into an inner liner 6011, an armor layer 6012 and an outer covering layer 6013, the inner liner 6011 is located outside the inner liner 602, the inner liner 6011 can prevent the inner liner 602 from being damaged by the armor layer 6012 when a cable is bent, the armor layer 6012 wraps the outside of the inner liner 6011, the armor layer 6012 is used for bearing a protective layer of mechanical force (compression resistance or tensile) acting on the cable and also plays a role in shielding an electric field and preventing interference of external electromagnetic waves, the outer covering layer 6013 wraps the outside of the armor layer 6012, and the outer covering layer 6013 protects the armor layer 6012 from external influence and mechanical damage, such as protection of cable cores and insulation impregnations in transportation, installation, laying and operation, and avoids mechanical damage, moisture, leakage, outflow corrosion and the like.

Specifically, the insulating layer 2 is in a structure of inorganic powder filling, is mechanically filled with inorganic powder materials (MgO and the like), is not burnt, is insect-bite-resistant, waterproof, environment-friendly, long in service life and long in continuous working life.

Specifically, the waterproof layer 3 adopts a metal sheath, and the metal sheath has the greatest characteristic of complete impermeability, so that the cable with the metal sheath has very good radial water resistance.

Specifically, the fire-resistant layer 4 is made of a ceramic silicon rubber material, and the ceramic silicon rubber material has low smoke, no toxicity and corrosion resistance, and is a fire-resistant material with excellent performance.

Specifically, the flame retardant layer 5 is made of a halogen-free flame retardant material, and when a fire disaster occurs, the halogen-containing flame retardant material can generate a large amount of smoke and toxic corrosive hydrogen halide gas, so that secondary harm is caused. The halogen-free flame retardant material has small smoke amount during combustion and does not generate toxic and corrosive gas. The halogen-free flame retardant additive mainly comprises phosphorus compounds and metal hydroxides. These two types of compounds are called non-pollution flame retardants, which do not volatilize and generate corrosive gases during combustion.

Particularly, inner liner 6011 adopts three-layer cable paper parcel to form, and the cable paper can prevent that moisture from invading, also lets the conductor suffer destruction, armor 6012 adopts the steel wire to weave and forms, and steel wire armor 6012 has high magnetic permeability, has fine magnetism shielding effect, outer tegument 6013 adopts hard polyvinyl chloride material, and hard polyvinyl chloride material has advantages such as the quality is light, thermal-insulated, keeps warm, dampproofing, fire-retardant, acid and alkali-resistance, anticorrosive.

The working principle is as follows: the utility model relates to a fire-retardant direct current cable, when the position that direct current cable located is lower, the insulating layer can ensure that the electric current of transmission does not leak to the external world, also can prevent that the electric power of cable from hindering external things or personnel on every side, can protect the personnel that are located direct current cable through the insulating layer, avoid electric power injury, the waterproof layer has waterproof function, can prevent effectively among the water infiltration cable, contact with the conductor, influence the transportation of electric power, and cause the safety problem, when the cable catches fire, can guarantee a certain time through the flame retardant coating, still can guarantee the conveying of electric power, guarantee personnel can withdraw safely, can restrict burning in local range through the flame retardant coating, do not produce and stretch, keep other various equipment, avoid causing bigger loss, and the flame retardant coating smoke volume is little when burning, do not produce poisonous, corrosive gas, can protect the cable through the protective layer and avoid receiving mechanical damage, Damp, leakage, outflow, corrosion, etc.

Example 2: referring to fig. 4-5, the difference between this embodiment and embodiment 1 is that a shielding layer 7 is disposed between the insulating layer 2 and the waterproof layer 3, the shielding layer 7 is divided into an inner shielding layer 701 and an outer shielding layer 702, the inner shielding layer 701 is located outside the insulating layer 2, the outer shielding layer 702 is wrapped outside the inner shielding layer 701, the inner shielding layer 701 is made of semiconductor paper, and the outer shielding layer 702 is made of a braided copper wire tape. Please refer to the description of embodiment 1 for the structure not mentioned in this embodiment.

The working principle is as follows: the utility model relates to a fire-retardant direct current cable, when the position that direct current cable located is lower, the insulating layer can ensure that the electric current of transmission does not leak to the external world, also can prevent that the electric power of cable from hindering external things or personnel on every side, can protect the personnel that are located direct current cable through the insulating layer, avoid electric power injury, the waterproof layer has waterproof function, can prevent effectively among the water infiltration cable, contact with the conductor, influence the transportation of electric power, and cause the safety problem, when the cable catches fire, can guarantee a certain time through the flame retardant coating, still can guarantee the conveying of electric power, guarantee personnel can withdraw safely, can restrict burning in local range through the flame retardant coating, do not produce and stretch, keep other various equipment, avoid causing bigger loss, and the flame retardant coating smoke volume is little when burning, do not produce poisonous, corrosive gas, can protect the cable through the protective layer and avoid receiving mechanical damage, Affected tide, seepage outflow, effect such as corruption, but sometimes the transmission capacity of cable is too big, and produced magnetic field is too big, and the magnetic shielding effect of armor is limited, can not be fine shielding magnetic field, adds the shielding layer between insulating layer and waterproof layer this moment, reducible external electromagnetic field to power or communication line's influence, the shielding layer needs ground connection, and external interference signal can be by this layer leading-in earth, avoids interference signal to get into inner conductor interference and reduces transmission signal's loss simultaneously.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A flame retardant dc cable comprising a conductor (1), characterized in that: the utility model discloses a novel cable, including conductor (1), conductor (1) outside parcel has insulating layer (2), the outside parcel of insulating layer (2) has waterproof layer (3), the outside parcel of waterproof layer (3) has flame retardant coating (4), the outside parcel of flame retardant coating (4) has fire-retardant layer (5), the outside parcel of fire-retardant layer (5) has sheath (6), and inner sheath (602) are located the outside of fire-retardant layer (5), the outside of inner sheath (602) is wrapped up by outer jacket (601), outer jacket (601) divide into inner liner (6011), armor (6012) and outer tegument (6013), inner liner (6011) are located the outside of inner sheath (602), the outside parcel of inner liner (6011) has armor (6012), the outside parcel of armor (6012) has outer tegument (6013).

2. A flame retardant dc cable according to claim 1, wherein: the insulating layer (2) adopts a structure filled with inorganic powder.

3. A flame retardant dc cable according to claim 1, wherein: the waterproof layer (3) adopts a metal protective layer.

4. A flame retardant dc cable according to claim 1, wherein: the fire-resistant layer (4) is made of ceramic silicon rubber.

5. A flame retardant dc cable according to claim 1, wherein: the flame-retardant layer (5) is made of a halogen-free flame-retardant material.

6. A flame retardant dc cable according to claim 1, wherein: inner liner (6011) adopt three-layer cable paper parcel to form, armor (6012) adopt the steel wire to weave to form, tegument (6013) adopt hard polyvinyl chloride material.

7. A flame retardant dc cable according to claim 6, wherein: be equipped with shielding layer (7) between insulating layer (2) and waterproof layer (3), shielding layer (7) divide into internal shield layer (701) and external shield layer (702), internal shield layer (701) are located the outside of insulating layer (2), the outside parcel external shield layer (702) of internal shield layer (701), internal shield layer (701) adopt the semiconductor paper material, external shield layer (702) adopt and weave the copper silk ribbon.

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