CN113012848A - Environment-friendly cable with fireproof electrode and preparation method thereof - Google Patents

Abstract

The invention discloses an environment-friendly cable with a fireproof electrode and a preparation method thereof.A heat insulation layer is a ceramic fireproof silicon rubber belt, can generate uniform ceramic micropores under a high-temperature condition, has hard quality and good heat insulation effect, has a melting temperature as high as 3000 ℃, effectively protects the insulation layer of the cable from being burnt out, and keeps the power cable to normally run within a certain time; the flame-retardant layer material is improved, and the halogen-free low-smoke low-toxicity flame-retardant composite material is adopted, so that the smoke yield and toxicity of the power cable under the condition of fire are effectively reduced; the novel semi-conductive fireproof coating extruding process is adopted, the fireproof performance of the cable is effectively improved, the step that fireproof paint needs to be coated on the surface of the cable after the traditional cable laying is finished is omitted, the laying is simpler, and the energy is saved and the environment is protected.

Description

Environment-friendly cable with fireproof electrode and preparation method thereof

Technical Field

The invention relates to the technical field of power cables, in particular to an environment-friendly cable with a fireproof electrode and a preparation method thereof.

Background

In recent years, with the advance of urbanization and urban planning and construction, the importance of fire safety in electric energy and information transmission control in automatic safety fire-fighting systems and emergency power supply systems has emerged in the construction of domestic high-rise buildings, petroleum, mines, metallurgy, ships, power stations, subways, airports, stations, tunnel traffic, and the increase of large public sports, entertainment venues, public transportation facilities. How to guarantee the smoothness of electric power and communication within a certain time under the condition of fire, win precious rescue time to the utmost extent, reduce casualties and loss of lives and properties becomes the problem which needs to be solved urgently by people.

The existing power cable often does not have good environmental protection performance while having the fire release performance, and in the preparation process of the power cable, when a plurality of copper conductors are cabled, the copper conductors cannot be kept relatively fixed, so that the whole power cable is prepared more complexly.

Disclosure of Invention

The invention aims to solve the technical problems that the power cable often has no good environmental protection property while having the fire release performance, and in the preparation process of the power cable, when a plurality of copper conductors are cabled, the copper conductors cannot be kept relatively fixed, so that the preparation of the whole power cable is more complicated.

In order to solve the technical problems, the invention provides an environment-friendly cable with a fireproof electrode, which comprises three cable cores twisted with each other, wherein a heat insulation layer, a flame retardant layer and an outer protection fireproof layer are sequentially coated outside the cable cores, and each cable core comprises a cable core and an insulation layer coated outside the cable core; a plurality of fixing devices used for keeping all cable cores relatively fixed are arranged in the heat insulation layer at intervals along the length direction of the cable cores, each fixing device comprises a supporting rod arranged along the length direction of the cable core, a plurality of clamping mechanisms used for clamping the cable cores are fixed on the supporting rods at intervals along the length direction of the supporting rods, each clamping mechanism comprises 3 clamping plates arranged at intervals along the circumference direction of the supporting rods, a clamping area used for clamping the cable cores is formed between every two adjacent clamping plates in the same clamping mechanism, the cable cores respectively penetrate through one clamping area in each clamping mechanism along the length direction of the supporting rods, and all clamping areas penetrated by the cable cores are staggered mutually along the circumference direction of the supporting rods.

The technical scheme of the invention is further defined as follows: the fixture sets up to 3 along the length direction equidistant interval of a strut.

Further, the distance between adjacent clamping mechanisms is set to be equal to the length of the clamping mechanism.

The environment-friendly cable with the fireproof electrodes is characterized in that all the clamping mechanisms are completely overlapped along the length direction of the supporting rod.

The utility model provides a preceding environmental protection cable that possesses fire prevention electrode, the length of grip block along branch diametric direction sets up to be greater than the radius of cable core.

The utility model provides a possess fire-resisting electrode's environmental protection cable, the sinle silk sets up to the copper conductor, and the material of insulating layer sets up to crosslinked polyethylene, and the insulating layer sets up to ceramic fire prevention silicon rubber area, and the material on fire-retardant layer sets up to low smoke and zero halogen low toxicity fire-retardant polyolefin material.

The invention also aims to provide a preparation method of the environment-friendly cable with the fireproof electrode, which comprises the following steps:

s1, stranding the copper conductors to manufacture wire cores;

s2, extruding the cross-linked polyethylene outside the wire core to form an insulating layer;

s3, the wire cores and the insulating layers form cable cores, the three cable cores are twisted into a cable, the cable cores penetrate through mutually staggered clamping areas in the twisting process, and the three cable cores are operated in the same step, so that the fixing device is installed;

s4, determining the number of required fixing devices according to the length of the power cable, and respectively installing the fixing devices in the step S3;

s5, wrapping ceramic fireproof silicone rubber tapes outside all cable cores and the fixing devices to form a heat insulation layer;

s6, extruding a low-smoke halogen-free low-toxicity flame-retardant polyolefin material outside the heat insulation layer to form a flame-retardant layer;

s7, extruding the fireproof semiconductive coating outside the flame-retardant layer to form an outer protective flame-retardant layer, and simultaneously completing the preparation of the whole power cable.

In the aforementioned method for manufacturing an environment-friendly cable with a fireproof electrode, step S5 further includes filling a low-smoke halogen-free flame retardant material between the cable core and the thermal insulation layer.

The invention has the beneficial effects that:

(1) in the invention, the heat insulation layer is a ceramic fireproof silicon rubber belt, uniform ceramic micropores can be generated under the high-temperature condition, the quality is hard, the melting temperature is up to 3000 ℃, the heat insulation effect is good, the insulation layer of the cable is effectively protected from being burnt out, and the normal operation of the power cable is kept within a certain time; the flame-retardant layer material is improved, and the halogen-free low-smoke low-toxicity flame-retardant composite material is adopted, so that the smoke yield and toxicity of the power cable under the condition of fire are effectively reduced; the novel semi-conductive fireproof coating extrusion process is adopted, so that the fireproof performance of the cable is effectively improved, the step that fireproof paint needs to be coated on the surface of the cable after the traditional cable is laid is omitted, the laying is simpler, and the energy is saved and the environment is protected;

(2) according to the invention, the fixing device is arranged, so that cable cores can respectively penetrate through clamping areas in different clamping mechanisms when the cable cores are twisted, and the cable cores are clamped through the clamping plates, and the clamping areas where the cable cores penetrate are staggered, so that the cable cores are clamped through 3 clamping mechanisms, and displacement in the circumferential direction and the length direction is avoided, so that 3 cable cores can be relatively fixed, and the convenience of the whole power cable is greatly improved;

(3) according to the invention, the position and the shape of the clamping plate are arranged, so that the cable has enough space to move, and can conveniently penetrate through clamping areas in different clamping mechanisms, the fixing operation of the fixing device on the cable is more convenient, the fixing effect of the fixing device on all the cables is better, and the whole power cable is further more convenient and easier to prepare.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of the fixing device of the present invention.

Wherein: 1. a cable core; 11. a wire core; 12. an insulating layer; 2. a thermal insulation layer; 3. a flame retardant layer; 4. an outer protective fireproof layer; 5. a fixing device; 51. a strut; 52. a clamping mechanism; 521. a clamping plate; 522. a clamping area.

Detailed Description

The environment-friendly cable with the fireproof electrode provided by the embodiment has a structure as shown in fig. 1 to 2, and includes three cable cores 1 twisted with each other, each cable core 1 includes a wire core 11 and an insulating layer 12 coated outside the wire core 11, the wire core 11 is a copper conductor, and the insulating layer 12 is made of cross-linked polyethylene; the cable core 1 is wrapped in proper order outward and has insulating layer 2, fire-retardant layer 3, outer flame retardant coating 4, and insulating layer 2 sets up to ceramic fire prevention silicon rubber area, and fire-retardant layer 3's material sets up to low smoke and zero halogen low toxicity fire-retardant polyolefin material.

Be provided with a plurality of fixing device 5 along 1 length direction equidistance interval of cable core in insulating layer 2, fixing device 5 is used for making and keeps relatively fixed between all cable cores 1, fixing device 5 includes the branch 51 that sets up along 1 length direction of cable core, branch 51 is fixed with a plurality of fixture 52 that are used for centre gripping cable core 1 along self length direction interval, fixture 52 sets up to 3 along the length direction equidistance interval of branch 51, interval between the adjacent fixture 52 sets up to be equal to fixture 52's length, and fixture 52 coincides completely along the length direction of branch 51.

The clamping mechanism 52 comprises 3 clamping plates 521 arranged at equal intervals along the circumferential direction of the strut 51, the length of each clamping plate 521 along the diameter direction of the strut 51 is larger than the radius of the cable core 1, clamping areas 522 used for clamping the cable core 1 are formed between the adjacent clamping plates 521 in the same clamping mechanism 52, the cable core 1 respectively passes through one clamping area 522 in each clamping mechanism 52 along the length direction of the strut 51, and all the clamping areas 522 through which the cable core 1 passes are mutually staggered along the circumferential direction of the strut 51.

The preparation method of the environment-friendly cable with the fireproof electrode comprises the following steps:

s1, stranding the copper conductors to manufacture a wire core 11;

s2, extruding the cross-linked polyethylene outside the wire core 11 to form the insulating layer 12;

s3, the wire core 11 and the insulating layer 12 form a cable core 1, the three cable cores 1 are stranded into a cable, the cable core 1 penetrates through the mutually staggered clamping areas 522 in the stranding process, and the three cable cores 1 are operated in the same step, so that the installation of the fixing device 5 is completed;

s4, determining the number of the required fixing devices 5 according to the length of the power cable, and respectively installing the fixing devices in the step S3;

s5, wrapping ceramic fireproof silicone rubber belts outside all the cable cores 1 and the fixing devices 5 to form a heat insulation layer 2, and filling a low-smoke halogen-free flame retardant material between the cable cores 1 and the heat insulation layer 2;

s6, extruding a low-smoke halogen-free low-toxicity flame-retardant polyolefin material outside the heat-insulating layer 2 to form a flame-retardant layer 3;

s7, extruding the fireproof semiconductive coating outside the flame-retardant layer 3 to form an outer protective fireproof layer 4, and simultaneously completing the preparation of the whole power cable.

The heat insulation layer 2 is a ceramic fireproof silicon rubber belt, uniform ceramic micropores can be generated under the high-temperature condition, the quality is hard, the melting temperature is up to 3000 ℃, the heat insulation effect is good, the insulation layer 12 of the cable is effectively protected from being burnt out, and the normal operation of the power cable is kept within a certain time; the material of the flame-retardant layer 3 is improved, and a halogen-free low-smoke low-toxicity flame-retardant composite material is adopted, so that the smoke yield and toxicity of the power cable under the condition of fire are effectively reduced; the novel semi-conductive fireproof coating extrusion process is adopted, so that the fireproof performance of the cable is effectively improved, the step that fireproof paint needs to be coated on the surface of the cable after the traditional cable is laid is omitted, the laying is simpler, and the energy is saved and the environment is protected;

when the cable core 1 is twisted by the fixing device 5, the cable core 1 can pass through the clamping areas 522 of different clamping mechanisms 52 respectively, and the cable core 1 is clamped by the clamping plates, and the clamping areas 522 where the cable core 1 passes are staggered mutually, so that the cable core 1 is clamped by the 3 clamping mechanisms 52, and displacement in the circumferential direction and the length direction can not be generated, so that the 3 cable cores 1 can be kept relatively fixed, and the convenience in preparing the whole power cable is greatly improved.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims (8)

1. The utility model provides an possess environmental protection cable of fire prevention electrode which characterized in that: the cable comprises three cable cores (1) which are mutually twisted, wherein a heat insulation layer (2), a flame retardant layer (3) and an outer protection fireproof layer (4) are sequentially coated outside the cable cores (1), and each cable core (1) comprises a cable core (11) and an insulation layer (12) coated outside the cable core (11); a plurality of fixing devices (5) used for keeping all cable cores (1) relatively fixed are arranged in the heat insulation layer (2) at equal intervals along the length direction of the cable cores (1), each fixing device (5) comprises a support rod (51) arranged along the length direction of the cable core (1), a plurality of clamping mechanisms (52) used for clamping the cable cores (1) are fixed on the support rods (51) at intervals along the length direction of the support rods (51), each clamping mechanism (52) comprises 3 clamping plates (521) arranged at equal intervals along the circumferential direction of the support rod (51), clamping areas (522) used for clamping the cable cores (1) are formed between the adjacent clamping plates (521) in the same clamping mechanism (52), and the cable cores (1) respectively penetrate through one clamping area (522) in each clamping mechanism (52) along the length direction of the support rods (51), and all the clamping areas (522) penetrated by the cable core (1) are mutually staggered along the circumferential direction of the support rod (51).

2. The environmentally friendly cable with a fireproof electrode according to claim 1, wherein: the clamping mechanisms (52) are arranged in the length direction of the support rod (51) at equal intervals of 3.

3. The environmentally friendly cable with a fireproof electrode according to claim 2, wherein: the spacing between adjacent gripping mechanisms (52) is set equal to the length of the gripping mechanisms (52).

4. The environmentally friendly cable with a fireproof electrode according to claim 3, wherein: all the clamping mechanisms (52) are completely overlapped along the length direction of the support rod (51).

5. The environmentally friendly cable with a fireproof electrode according to claim 1, wherein: the length of the clamping plate (521) along the diameter direction of the support rod (51) is larger than the radius of the cable core (1).

6. The environmentally friendly cable with a fireproof electrode according to claim 1, wherein: the cable core (11) is arranged to be a copper conductor, the insulating layer (12) is made of cross-linked polyethylene, the heat insulating layer (2) is arranged to be a ceramic fireproof silicon rubber belt, and the flame-retardant layer (3) is made of low-smoke halogen-free low-toxicity flame-retardant polyolefin material.

7. A method for preparing the environment-friendly cable with the fireproof electrode according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

s1, stranding the copper conductors to manufacture a wire core (11);

s2, extruding cross-linked polyethylene outside the wire core (11) to form an insulating layer (12);

s3, the wire cores (11) and the insulating layer (12) form a cable core (1), the three cable cores (1) are twisted to form a cable, the cable core (1) penetrates through clamping areas (522) which are staggered with each other in the twisting process, and the three cable cores (1) are operated in the same step, so that the fixing device (5) is installed;

s4, determining the number of required fixing devices (5) according to the length of the power cable, and respectively installing the fixing devices in the step S3;

s5, wrapping ceramic fireproof silicone rubber belts outside all cable cores (1) and the fixing device (5) to form a heat insulation layer (2);

s6, extruding a low-smoke halogen-free low-toxicity flame-retardant polyolefin material outside the heat-insulating layer (2) to form a flame-retardant layer (3);

s7, extruding the fireproof semiconductive coating outside the flame-retardant layer (3) to form an outer protective fireproof layer (4), and simultaneously completing the preparation of the whole power cable.

8. The method for preparing the environmental-friendly cable with the fireproof electrode, according to claim 7, is characterized in that: and the step S5 further comprises filling a low-smoke halogen-free flame-retardant material between the cable core (1) and the heat insulation layer (2).

Images