CN215118372U - B1-level waterproof and fireproof medium-voltage cable - Google Patents

Abstract

The utility model discloses a waterproof fire prevention medium voltage cable of B1 level in cable conductor technical field, including the sinle silk, the sinle silk includes the conductor and crowded insulating layer altogether, the outside parcel of conductor has crowded insulating layer altogether, crowded insulating layer includes conductor shielding layer, insulating layer and insulating barrier altogether, the outside parcel of conductor has the conductor shielding layer, the outside parcel of conductor shielding layer has the insulating layer, the outside parcel of insulating layer has the insulating barrier, the sinle silk outside has wrapped the metallic shield, around covering, isolation layer, metal armor and oversheath layer from inside to outside in proper order, and this cable conductor simple structure has waterproof fire prevention's performance, effectively improves resistance to compression and corrosion-resistant ability, increase of service life.

Description

B1-level waterproof and fireproof medium-voltage cable

Firstly, the method comprises the following steps: Technical Field

The utility model relates to a medium voltage cable technical field specifically is a B1 level waterproof and fireproof medium voltage cable.

II, secondly: background

The wire and cable is a wire product used for transmitting electric (magnetic) energy, information and realizing electromagnetic energy conversion. The generalized electric wire and cable is also called as cable for short, the narrow-sense cable is insulated cable, the common flame-retardant medium-voltage cable can release a large amount of dense smoke and toxic corrosive gas when burning, the medium-voltage cable suitable for various occasions can seriously harm the life and property safety of people once burning in case of fire, and can also bring secondary harm to the surrounding environment and fire rescue personnel, the halogen-free low-smoke flame-retardant medium-voltage cable has good flame retardance, no harmful gas is emitted when the cable burns, the smoke quantity of the cable is small, and the smoke quantity can not meet the new version 'regulations for grading the combustion performance of the cable and the optical cable', the invention can enable the flame retardance of the cable to reach A level, the combustion performance to reach B1 level, further improves the safety performance, and is suitable for rail transit, civil super high-rise buildings, markets, schools, subway stations, airports, stadiums and the like, A B1-grade waterproof and fireproof medium-voltage cable is provided for medium-voltage systems in exhibition halls, hospitals and other densely populated public places, and the service life of the existing cable is shortened due to low pressure resistance.

Thirdly, the method comprises the following steps: SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waterproof fire prevention medium voltage cable of B1 level to solve the problem that proposes among 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 B1 level waterproof fire prevention medium voltage cable, includes the sinle silk, the sinle silk includes the conductor and crowded insulating layer altogether, the outside parcel of conductor has crowded insulating layer altogether, crowded insulating layer includes conductor shield, insulating layer and insulation shield altogether, the outside parcel of conductor has the conductor shield, the outside parcel of conductor shield has the insulating layer, the outside parcel of insulating layer has the insulation shield, the sinle silk outside is wrapped up in proper order from inside to outside has the metal shielding layer, around covering, isolation layer, metal armor and oversheath layer.

Preferably, the metal shielding layer comprises a copper wire and a copper strip, the copper wire is uniformly wound outside the wire core, and the copper strip is tightly tied outside the copper wire.

Preferably, the wrapping layer is formed by double-layer wrapping of a semiconductive water-blocking tape and a low-smoke zero-halogen tape, and the low-smoke zero-halogen tape is wrapped outside the semiconductive water-blocking tape.

Preferably, the isolation layer comprises an aluminum-plastic composite belt, a ceramic halogen-free low-smoke flame retardant material and a double-layer low-smoke halogen-free belt, the double-layer low-smoke halogen-free belt wraps the outside of the aluminum-plastic composite belt, and the ceramic halogen-free low-smoke flame retardant material is arranged between the aluminum-plastic composite belt and the double-layer low-smoke halogen-free belt.

Preferably, the metal armor layer comprises a brass band and a glass fiber band, and the metal armor layer is formed by wrapping a brass band armored double-layer glass fiber band together.

Preferably, the outer sheath layer comprises a pressure-resistant layer and a sheath material layer, the pressure-resistant layer is arranged inside the sheath material layer, and a PVC (polyvinyl chloride) outer sleeve is sleeved outside the outer sheath layer.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the core insulation shielding layer adopts a three-layer co-extrusion mode, so that a good electric field homogenizing effect can be achieved, and the service life and the electric energy transmission performance of the finished cable are improved;

2. the double-layer shielding of copper wire winding and copper belt binding has stronger capacity of bearing short-circuit current;

3. the aluminum-plastic composite belt longitudinal wrapping and the ceramic isolation layer extruded by the halogen-free low-smoke-resistance fuel are arranged, so that the fireproof and fire-resistant composite belt has excellent waterproof performance and more excellent fireproof and fire-resistant performance;

4. the brass strip armor can meet the sufficient compressive mechanical strength of the cable, so that the cable is small in outer diameter, light in weight, excellent in bending radius and excellent in rat and termite resistance;

5. by arranging the flame-retardant B1-grade polyolefin outer sheath, harmful gas can not be emitted and harm to people can not be caused when a fire disaster happens, and fire fighters can easily enter the scene for rescue quickly;

6. through being equipped with the compressive property layer, effectively increased the compressive property of this cable conductor, through being provided with the PVC sheath, effectively increased the corrosion resisting property of this cable conductor, can prolong the life of this cable conductor.

Fourthly, the method comprises the following steps: drawings

Fig. 1 is a schematic structural view of a B1-grade waterproof and fireproof medium-voltage cable of the present invention.

In the figure: 1. a conductor; 2. co-extruding an insulating layer; 201. a conductor shield layer; 202. an insulating layer; 203. an insulating shield layer; 3. a wire core; 4. a metal shielding layer; 401. a copper wire; 402. copper strips; 5. wrapping a covering; 501. A semiconductive water-blocking tape; 502. a low smoke, zero halogen tape; 6. an isolation layer; 601. an aluminum-plastic composite tape; 602. ceramic halogen-free low smoke resistance fuel; 603. a double layer low smoke zero halogen tape; 7. a metal armor layer; 701. a brass band; 702. a glass fiber tape; 8. an outer jacket layer; 801. a pressure resistant layer; 802. a sheath material layer; 9. and (4) a PVC outer sleeve.

Fifthly: 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, the present invention provides a technical solution: the utility model provides a B1 level waterproof fire prevention medium voltage cable, including sinle silk 3, sinle silk 3 includes conductor 1 and crowded insulating layer 2 altogether, 1 outside parcel of conductor has crowded insulating layer 2 altogether, crowded insulating layer 2 altogether includes conductor shielding layer 201, insulating layer 202 and insulation shield 203, 1 outside parcel of conductor has conductor shielding layer 201, the outside parcel of conductor shielding layer 201 has insulating layer 202, the outside parcel of insulating layer 202 has insulation shield 203, conductor 1 is the copper conductor, and the conductor1 cross-sectional area is more than or equal to 95mm²The conductor is a 2-class compact round conductor meeting the GB/T3956 specification, the co-extrusion insulating layer 2 is made of an indelible material, and the conductor shielding layer 201, the insulating layer 202 and the insulating shielding layer 203 are sequentially wrapped on the conductor 1 in a three-layer co-extrusion mode, so that a good electric field homogenizing effect can be achieved, and the service life and the electric energy transmission performance of a finished cable are improved.

In this embodiment, referring to fig. 1, a metal shielding layer 4, a wrapping layer 5, an isolation layer 6, a metal armor layer 7, and an outer sheath layer 8 are sequentially wrapped outside a wire core 3 from inside to outside, and an anticorrosive coating is coated outside the outer sheath layer 8, so that the anticorrosive performance of the cable is effectively improved.

In this embodiment, referring to fig. 1, the metal shielding layer 4 includes a copper wire 401 and a copper tape 402, the copper wire 401 is uniformly wound around the outside of the core 3, the copper tape 402 is tightly fastened to the outside of the copper wire 401, the metal shielding layer 4 is wound around a single core by a semi-conductive nylon tape, and then wound by the copper wire 401 and fastened by the copper tape 402, the thickness of the semi-conductive nylon tape is 0.14mm, the overlapping rate is 15% -20%, and the thickness of the copper tape 402 is 0.1 mm.

In this embodiment, referring to fig. 1, the wrapping layer 5 is formed by double-layer wrapping of a semiconductive water-blocking tape 501 and a low-smoke halogen-free tape 502, and the exterior of the semiconductive water-blocking tape 501 is wrapped by the low-smoke halogen-free tape 502, so that an effective water-blocking effect and flame-retardant and fireproof performance can be achieved.

In this embodiment, referring to fig. 1, the isolation layer 6 includes an aluminum-plastic composite tape 601, a ceramic halogen-free low-smoke flame retardant 602 and a double-layer low-smoke halogen-free tape 603, the aluminum-plastic composite tape 601 is wrapped by the double-layer low-smoke halogen-free tape 603, the ceramic halogen-free low-smoke flame retardant 602 is disposed between the aluminum-plastic composite tape 601 and the double-layer low-smoke halogen-free tape 603, the aluminum-plastic composite tape 601 has a thickness of 0.25mm and plays a role in waterproofing, the ceramic halogen-free low-smoke flame retardant 602 has a unique ceramic mechanism, so that the cable can be rapidly ceramic in the burning process of fire, the strength of the burning residues is greatly improved, the purpose of fire prevention is achieved, the halogen-free low-smoke flame retardant material 602 does not emit a large amount of smoke and toxic corrosive gas when burning, and does not harm to the human body, thereby facilitating rescue of fire fighters, the isolation layer 6 is wrapped by the ceramic halogen-free low-smoke flame retardant tape 603 after being extruded by the ceramic halogen-free low-smoke flame retardant material 602, the specification is 0.2mm, and the overlapping rate is 20-25%.

In this embodiment, referring to fig. 1, the metal armor layer 7 includes a brass band 701 and a glass fiber tape 702, the metal armor layer 7 is formed by wrapping a double-layer glass fiber tape 702 after being armored by the brass band 701, the thickness of the brass band 701 is 0.12mm, the overlapping rate is 15% to 20%, the compressive mechanical strength can be satisfied, the cable has a smaller outer diameter, a lighter weight and a better bending radius, the brass band 701 armor outside the metal armor layer 7 is wrapped by the double-layer glass fiber tape 702, the thickness of the glass fiber tape 702 is 0.2mm, the overlapping rate is 20% to 25%, and the glass fiber tape 702 has high flame retardant performance.

Example 2

Referring to fig. 1, this embodiment is different from the first embodiment in that: outer jacket layer 8 includes anti-pressure layer 801 and jacket bed of material 802, the inside anti-pressure layer 801 that is provided with of jacket bed of material 802, PVC overcoat 9 has been cup jointed to outer jacket layer 8 outside, the material of jacket bed of material 802 is fire-retardant B1 level polyolefin sheath material, nominal thickness is 2.4mm, B1 level polyolefin sheath material can make the fire behaviour of cable reach A level, combustion behavior reaches B1 level, through set up the PVC overcoat in anti-pressure layer 802 outside, the corrosion resisting property of this cable conductor has effectively been increased, and service life is prolonged.

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 (6)

1. The utility model provides a waterproof fire prevention medium voltage cable of B1 level, includes sinle silk (3), its characterized in that: sinle silk (3) are including conductor (1) and crowded insulating layer (2) altogether, conductor (1) outside parcel has crowded insulating layer (2) altogether, crowded insulating layer (2) altogether includes conductor shield (201), insulating layer (202) and insulation shield (203), conductor (1) outside parcel has conductor shield (201), conductor shield (201) outside parcel has insulating layer (202), insulating layer (202) outside parcel has insulation shield (203), sinle silk (3) outside from inside to outside wraps up in proper order has metallic shield (4), winds covering (5), isolation layer (6), metal armor (7) and oversheath layer (8).

2. The waterproof and fireproof medium voltage cable of class B1 according to claim 1, wherein: the metal shielding layer (4) comprises copper wires (401) and copper strips (402), the copper wires (401) are uniformly wound on the outer portion of the wire core (3), and the copper strips (402) are tightly tied on the outer portion of the copper wires (401).

3. The waterproof and fireproof medium voltage cable of class B1 according to claim 1, wherein: the wrapping layer (5) is formed by double-layer wrapping of a semi-conductive water-blocking tape (501) and a low-smoke zero-halogen tape (502), and the semi-conductive water-blocking tape (501) is wrapped by the low-smoke zero-halogen tape (502).

4. The waterproof and fireproof medium voltage cable of class B1 according to claim 1, wherein: isolation layer (6) are including aluminium-plastic composite area (601), ceramic zero halogen low smoke resistance fuel (602) and double-deck low smoke zero halogen area (603), aluminium-plastic composite area (601) outside parcel has double-deck low smoke zero halogen area (603), be provided with ceramic zero halogen low smoke resistance fuel (602) between aluminium-plastic composite area (601) and double-deck low smoke zero halogen area (603).

5. The waterproof and fireproof medium voltage cable of class B1 according to claim 1, wherein: the metal armor layer (7) comprises a brass strip (701) and a glass fiber tape (702), and the metal armor layer (7) is formed by wrapping the brass strip (701) armored by double layers of the glass fiber tape (702).

6. The waterproof and fireproof medium voltage cable of class B1 according to claim 1, wherein: the outer jacket layer (8) comprises a pressure-resistant layer (801) and a jacket material layer (802), wherein the pressure-resistant layer (801) is arranged inside the jacket material layer (802), and a PVC jacket (9) is sleeved outside the outer jacket layer (8).

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