CN211957175U - Explosion-proof fireproof cable - Google Patents

Abstract

The utility model relates to an explosion-proof and fireproof cable, comprising: a multi-strand cable core, a single-strand cable core including a conductor, and the outer conductor is sequentially covered with a low-capacitance insulating layer, a sub-shielding layer and a reinforcing layer from the inside to the outside; The outer sheath is wrapped on the outside of all the cable cores, and the outer sheath sequentially includes a total shielding layer, a heat insulation layer, a double water barrier layer and a ring protection sleeve from the inside to the outside. The low-capacitance and low-inductance characteristics of the low-capacitance insulating layer of the utility model make the energy stored in the cable smaller, reduce the energy of electric sparks when a fault occurs, and reduce potential safety hazards; the sub-shielding layer and the overall shielding layer play a dual role The anti-static, magnetic field and other interference effects, and can release the free electrons stored in the cable, further reducing the energy of the electric spark, reducing the safety hazard; when damp, the double water barrier can play a better water barrier, avoiding The thermal insulation layer is eroded or deliquescence by water vapor, which ensures its thermal insulation and fire resistance performance.

Description

An explosion-proof and fireproof cable

technical field

The utility model relates to the technical field of cables, in particular to an explosion-proof and fire-proof cable.

Background technique

The application range of fireproof cables is relatively wide, including many industrial environments with harsh environments. When the existing fireproof cables are used in such environments, although their fireproof performance can generally meet the stricter requirements for use, due to their poor explosion-proof performance, When it is used in the environment of flammable and explosive gas and there is a circuit failure, the generated spark energy is relatively large, which is easy to cause an explosion, and there is a certain safety hazard.

SUMMARY OF THE INVENTION

The utility model aims to solve the deficiencies of the prior art, and provides an explosion-proof and fire-proof cable.

The utility model adopts the following technical solutions for realizing the above-mentioned purpose:

An explosion-proof and fireproof cable, comprising:

Multi-strand cable core, single-strand cable core includes conductor, and the outer conductor is covered with low-capacitance insulating layer, sub-shielding layer and reinforcing layer in turn from the inside to the outside;

The outer sheath is wrapped around the outside of all the cable cores, and the outer sheath includes a total shielding layer, a thermal insulation layer, a double water barrier layer, and a ring protective sleeve in turn from the inside to the outside.

Further, the conductor in the single-strand cable core is twisted by a plurality of wires.

Further, insulating fillers are filled between the wires of the conductors and between the conductors and the low-capacitance insulating layer, and the insulating fillers are made of ceramic silicon rubber.

Further, fireproof fillers are filled between the multi-strand cable cores and between the cable cores and the overall shielding layer.

Further, the reinforcing layer is made of glass fiber wrapping.

Further, the low-capacitance insulating layer is high-density polyethylene.

Further, the double water barrier layer is made from the inside to the outside by wrapping with water blocking tape and wrapping with water blocking rope in turn.

Further, the thermal insulation layer is made of mica tape wrapping.

Further, the overall shielding layer is a copper mesh braided shielding layer, and the sub-shielding layer is an aluminum foil shielding layer.

Further, steel strands are twisted between the multi-strand cable cores.

The beneficial effects of the utility model are: the characteristics of low capacitance and low inductance of the low-capacitance insulating layer of the present utility model make the energy stored in the cable smaller, reduce the energy of electric sparks when a fault occurs, and reduce potential safety hazards; separate shielding The shielding layer and the overall shielding layer play double anti-static, magnetic field and other interference effects, and can release the free electrons stored in the cable, further reducing the energy of the electric spark and reducing the potential safety hazard; the double water barrier can play a role in dampness. The better water-proof effect prevents the thermal insulation layer from being corroded by water vapor or deliquescence, and ensures its thermal insulation and fire resistance performance.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure: 1-Cable core; 11-Conductor; 12-Low capacitance insulating layer; 13-Separate shielding layer; 14-Strengthening layer; 15-Insulating filler; Insulation layer; 23-Double water barrier; 24-Ring protective cover; 25-Fireproof filler; 3-Steel strand;

The following will be described in detail with reference to the accompanying drawings in conjunction with the embodiments of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

As shown in the figure, an explosion-proof and fire-proof cable includes:

The multi-strand cable core 1, the single-strand cable core 1 includes a conductor 11, and the conductor 11 is sequentially coated with a low-capacitance insulating layer 12, a sub-shielding layer 13, and a reinforcing layer 14 from the inside to the outside;

Outer sheath 2, the outer sheath 2 is wrapped on the outside of all the cable cores 1, and the outer sheath 2 includes a total shielding layer 21, a heat insulation layer 22, a double water barrier layer 23, and a ring protection sleeve 24 sequentially from the inside to the outside.

Further, the conductor 11 in the single-strand cable core 1 is formed by twisting a plurality of wires.

Further, insulating fillers 15 are filled between the wires of the conductors 11 and between the conductors 11 and the low-capacitance insulating layer 12 , and the insulating fillers 15 are made of ceramic silicon rubber.

Further, fireproof fillers 25 are filled between the multi-strand cable cores 1 and between the cable cores 1 and the overall shielding layer 21 .

Further, the reinforcing layer 14 is made of glass fiber wrapping.

Further, the low-capacitance insulating layer 12 is high-density polyethylene.

Further, the double water barrier layer 23 is made by wrapping the water blocking tape and the water blocking rope in turn from the inside to the outside.

Further, the heat insulating layer 22 is made by wrapping the mica tape.

Further, the overall shielding layer 21 is a copper mesh braided shielding layer, and the sub-shielding layer 13 is an aluminum foil shielding layer.

Further, steel strands 3 are twisted between the multi-strand cable cores 1 .

When the utility model is used, the characteristics of low capacitance and low inductance of the low-capacitance insulating layer 12 make the energy stored in the cable smaller, reduce the energy of electric sparks when fault occurs, and reduce potential safety hazards; the separate shielding layer 13 and the total shielding The layer 22 plays a dual role of anti-static, magnetic field and other interference, and can release the free electrons stored in the cable, further reducing the energy of the electric spark and reducing the potential safety hazard; the double water barrier layer 23 can play a better role when it is damp The water-repellent effect prevents the heat-insulating layer 22 from being corroded or deliquesced by water vapor, and ensures its heat-insulation and fire-proof performance.

The present utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned methods, as long as various improvements made by the method concept and technical solutions of the present utility model are adopted, or the Those applied to other occasions are all within the protection scope of the present invention.

Claims (10)

1. An explosion-proof and fire-proof cable is characterized in that, comprising: The multi-strand cable core (1), the single-strand cable core (1) includes a conductor (11), and the outer conductor (11) is sequentially covered with a low-capacitance insulating layer (12), a sub-shielding layer (13), a reinforcement layer from the inside to the outside layer(14); The outer sheath (2), the outer sheath (2) is wrapped on the outside of all the cable cores (1), and the outer sheath (2) sequentially includes a total shielding layer (21), a thermal insulation layer (22), Double water barrier (23), ring protection cover (24). 2 . The explosion-proof and fire-proof cable according to claim 1 , wherein the conductor ( 11 ) in the single-strand cable core ( 1 ) is formed by twisting a plurality of wires. 3 . 3. The explosion-proof and fireproof cable according to claim 2, characterized in that, insulating fillers (15) are filled between the wires of the conductors (11) and between the conductors (11) and the low-capacitance insulating layer (12), and the insulating fillers are filled with insulating fillers (15). (15) is made of ceramic silicon rubber. 4. The explosion-proof and fireproof cable according to claim 1, characterized in that, fireproof fillers (25) are filled between the multi-strand cable cores (1) and between the cable cores (1) and the overall shielding layer (21). 5. The explosion-proof and fireproof cable according to claim 1, wherein the reinforcing layer (14) is made of glass fiber wrapping. 6. The explosion-proof and fireproof cable according to claim 1, characterized in that, the low-capacitance insulating layer (12) is high-density polyethylene. 7. The explosion-proof and fireproof cable according to claim 1, characterized in that, the double water-proof layer (23) is made by wrapping a water-blocking tape and wrapping a water-blocking rope sequentially from the inside to the outside. 8. The explosion-proof and fire-proof cable according to claim 1, characterized in that, the heat insulating layer (22) is made of mica tape wrapping. 9 . The explosion-proof and fireproof cable according to claim 1 , wherein the overall shielding layer ( 21 ) is a copper mesh braided shielding layer, and the sub-shielding layers (13 ) are aluminum foil shielding layers. 10 . 10 . The explosion-proof and fire-proof cable according to claim 1 , wherein steel strands ( 3 ) are twisted between the multi-strand cable cores ( 1 ). 11 .

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