CN214624516U

CN214624516U - High-temperature-resistant cable

Info

Publication number: CN214624516U
Application number: CN202120190319.0U
Authority: CN
Inventors: 朱建芳; 梁新正; 张舒群
Original assignee: Zhejiang Wrlong High Temperature Wire & Cable Co ltd
Current assignee: Zhejiang Wrlong High Temperature Wire & Cable Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-11-05
Anticipated expiration: 2031-01-23

Abstract

The utility model relates to a high temperature resistant cable, it includes by outer to interior silicon rubber sheath, fire resistant mica layer, ceramic fiber layer, tinned copper line weaving layer, insulating layer and the cable core that sets gradually, it has the glass fiber layer to fill in the clearance of cable core and insulating layer, be equipped with the support frame in the glass fiber layer. This application has the effect that improves the high temperature resistance of cable.

Description

High-temperature-resistant cable

Technical Field

The application relates to the field of cables, in particular to a high-temperature-resistant cable.

Background

Cable is a generic term for optical cables, electrical cables, and the like. The cable has many purposes, mainly plays multiple roles of controlling installation, connecting equipment, transmitting electric power and the like, and is a common and indispensable object in daily life.

In the related art, chinese patent No. CN210896759U discloses a data cable, which includes a filling member, a core assembly and an outer layer external member, wherein the filling member includes a solid support bar and a plurality of extension bars, the solid support bar is provided with a plurality of continuous support concave surfaces, and each extension bar is disposed at the connection between two adjacent continuous support concave surfaces; the wire core group comprises a plurality of parallel wire pairs, each continuous supporting concave surface is used for correspondingly supporting one parallel wire pair, and the extending isolation strip is used for isolating two adjacent pairs of parallel wire pairs; the outer layer external member is coated outside the wire core group.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: in some special industries, such as military industry, steel industry, boiler industry and other industries with higher operating environment temperature, certain requirements are made on the high temperature resistance of cables. The data cable cannot resist high temperature and is difficult to use in a high-temperature environment, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to improve the high temperature resistance of cable, this application provides a high temperature resistant cable.

The application provides a high temperature resistant cable adopts following technical scheme:

the utility model provides a high temperature resistant cable, includes by outer silicone rubber sheath, fire resistant mica layer, ceramic fiber layer, tinned wire weaving layer, insulating layer and the cable core that sets gradually to interior, it has the glass fiber layer to fill in the clearance of cable core and insulating layer, be equipped with the support frame in the glass fiber layer.

Through adopting above-mentioned technical scheme, the silicon rubber sheath is high temperature resistant and insulating properties is good, and it sets up in the outside, can not only protect fire resistant mica layer, has still promoted the insulating properties of cable. The fire-resistant mica layer is formed by wrapping fire-resistant mica tapes, on one hand, the fire-resistant mica layer has excellent combustion resistance and can prevent the fire from spreading inwards after the silicone rubber sheath is ignited; on the other hand has the advantage that insulating properties is good, has promoted the insulating properties of cable. The ceramic fiber layer is made of ceramic fiber, and the ceramic fiber is high temperature resistant, has good thermal stability and low thermal conductivity, so that external heat in a high-temperature environment is difficult to transfer into the tinned copper wire layer, the insulating layer, the glass fiber layer and the cable core.

The tinned wire weaving layer is formed by weaving the tinned wire, and the tinned wire weaving layer can shield electromagnetic interference, avoids the electromagnetic wave interference normal work of all the other electrical components in the operational environment that the cable core produced. The insulating layer sets up in the cable core outside, can play the guard action to electrocuting, has promoted the security in the cable use. The glass fiber layer is made of glass fibers, the glass fibers are high in heat resistance, and can further insulate heat of the cable core located in the glass fiber layer so as to protect the cable core. The support frame of setting in the glass fiber layer makes the cable receive non-deformable when extrudeing, has promoted the anti bending property of cable. The high temperature resistance of the cable is high due to the silicon rubber sheath, the fire-resistant mica layer, the ceramic fiber layer and the glass fiber layer, so that the cable can be used in a high-temperature environment, and the high temperature resistance of the cable is improved.

Optionally, the cable core is a tinned copper wire.

Through adopting above-mentioned technical scheme, tinned wire compares in its corrosion resistance of bare copper line, oxidation resistance is stronger, and tinning can prevent that copper from being oxidized and form the poor verdigris of electric conductivity outside the copper line, consequently enables the electric conductive property of cable more stable as the cable core with tinned wire, has prolonged the life of cable.

Optionally, the number of the cable cores is two, and a polyvinyl chloride layer is arranged on the outer surface of each cable core.

By adopting the technical scheme, the polyvinyl chloride layer is made of polyvinyl chloride, and the polyvinyl chloride has good insulating property and can avoid short circuit caused by mutual contact of two cable cores. And the preparation process of the polyvinyl chloride is mature, and the performance-price ratio is higher.

Optionally, the support frame includes a diaphragm plate, and the two cable cores are respectively located on two opposite sides of the diaphragm plate.

By adopting the technical scheme, the diaphragm plate is used for separating the two cable cores, so that the two cable cores are prevented from contacting with each other, and the situation that different cable cores are contacted with each other and short-circuited due to the fact that the polyvinyl fluoride layer arranged on the outer surface of the cable cores is broken is avoided.

Optionally, a tensile core is arranged in the glass fiber layer.

Through adopting above-mentioned technical scheme, tensile strength that tensile core can promote the cable avoids the cable to warp because of receiving the pulling force.

Optionally, the insulating layer is an FEP layer.

Through adopting above-mentioned technical scheme, FEP layer is made by FEP material, and FEP has good insulating properties, can avoid the cable core electric leakage and lead to the staff to electrocute, has promoted the security that the cable used. Compared with polytetrafluoroethylene with similar performance to FEP, FEP has better processability and is more convenient to machine and mold.

Optionally, the outer surface of the silicone rubber sheath is coated with a fireproof coating.

Through adopting above-mentioned technical scheme, fire protection coating makes silicon rubber protective sheath can not with naked light direct contact to play the effect of protection silicon rubber protective sheath, promoted the fire resistance of rubber protective sheath.

Optionally, a polyurethane foam layer is arranged between the fire-resistant mica layer and the ceramic fiber layer.

Through adopting above-mentioned technical scheme, polyurethane foam layer is made by polyurethane foam, and when the heat passed to polyurethane foam layer through fire resistant mica layer, polyurethane foam can expand in order to increase the clearance between fire resistant mica layer and the ceramic fiber layer for the heat is difficult for gathering between fire resistant mica layer and ceramic fiber layer.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the fire-resistant mica layer can prevent external fire from spreading inwards, the ceramic fiber layer can prevent heat from transferring inwards, and the glass fiber layer can further prevent heat from transferring to the cable core, so that the high-temperature resistance of the cable is strong, and the practicability of the cable is improved;

2. the two cable cores are respectively positioned on two opposite sides of the diaphragm plate, so that the situation of short circuit caused by mutual contact of different cable cores when the polyvinyl chloride layer on the outer surface of the cable core is broken can be avoided;

3. the cable core adopts the tinned wire for the electric conductive property of cable core is more stable, has prolonged the life of cable.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the present application.

Description of reference numerals: 1. a silicone rubber sheath; 11. a fire-retardant coating; 2. a fire resistant mica layer; 3. a polyurethane foam layer; 4. a ceramic fiber layer; 5. a tinned copper wire braid layer; 6. a cable core; 61. a polyvinyl chloride layer; 7. an insulating layer; 8. a glass fiber layer; 9. a support frame; 91. a diaphragm plate; 92. a longitudinal partition plate; 10. and (4) resisting a tensile core.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses high temperature resistant cable. Referring to fig. 1, the high temperature resistant cable includes silicon rubber sheath 1, fire resistant mica layer 2, polyurethane foam layer 3, ceramic fiber layer 4, tinned wire weaving layer 5, insulating layer 7 and two cable cores 6 that outside-in set gradually, and the outside of every cable core 6 all is equipped with polyvinyl chloride layer 61, and it has glass fiber layer 8 to fill between polyvinyl chloride layer 61 and the insulating layer 7, is provided with two tensile cores 10 and a support frame 9 in the glass fiber layer 8.

Referring to fig. 1, the outer side of the silicone rubber sheath 1 is coated with a fireproof coating 11, the fireproof coating 11 is an expansion type fireproof coating 11, and the expansion type fireproof coating 11 expands when encountering fire to form a barrier for blocking heat so as to protect the silicone rubber sheath 1 from being ignited easily, so that the fire resistance of the silicone rubber sheath 1 is improved.

Referring to fig. 1, the material of silicon rubber sheath 1 is silicon rubber, and the silicon rubber is soft and has elasticity, can protect to set up at each layer of silicon rubber sheath 1 inboard, and silicon rubber has good insulating properties and high temperature resistance, can protect other structures in the cable under the operational environment of high temperature, can also prevent external cable and the contact short circuit of cable core 6.

Referring to fig. 1, fire-resistant mica layer 2 is formed in the 3 outsides of polyurethane foam layer around the package for fire-resistant mica tape, and fire-resistant mica tape has good resistant burning and insulating properties, and when silicon rubber sheath 1 took place the burning, fire-resistant mica layer 2 can further prevent flame to the inside spreading of cable, has promoted the fire-resistant security performance of cable.

Referring to fig. 1, polyurethane foam layer 3's material is polyurethane foam, and when heat passed through fire resistant mica layer 2 and spreads into polyurethane foam layer 3 under high temperature environment, polyurethane foam layer 3 can be heated the inflation, enlarges the space between fire resistant mica layer 2 and the ceramic fiber layer 4, has improved the radiating effect, avoids the heat to save, prevents that a large amount of heats from directly conveying to ceramic fiber layer 4, has promoted the heat resistance of cable.

Referring to fig. 1, the ceramic fiber layer 4 is made of ceramic fibers, and the ceramic fibers have high temperature resistance and good thermal stability, so that the ceramic fiber layer 4 can be normally used at a high ambient temperature. Ceramic fiber's heat conductivity is low for the heat is difficult for transmitting to tinned wire weaving layer 5 in through ceramic fiber layer 4, thereby makes tinned wire weaving layer 5 and tinned wire weaving layer 5 inside structure compare in the cable outside can be in a lower temperature, with the 6 transmission electric power of guarantee cable core. The ceramic fibers are light in weight, thereby reducing the overall weight of the cable and facilitating cable installation.

Referring to fig. 1, tinned wire weaving layer 5 is woven by the tinned wire and is made, and cable core 6 can produce magnetic field when carrying electric power, and tinned wire weaving layer 5 can shield above-mentioned magnetic field in the cable, reduces the cable to the interference of nearby electrical components.

Referring to fig. 1, the insulating layer 7 is an FEP layer made of FEP, which has excellent insulating properties and can prevent the cable core 6 from electric leakage to cause electric shock. The FEP is not ignited, can form a double flame retardant effect with the fire resistant mica layer 2, has good thermoplastic processability and is convenient to produce and process.

Referring to fig. 1, the glass fiber layer 8 is made of glass fibers, the glass fibers have good heat resistance, and the glass fibers are used as filling to protect the cable core 6 and reduce heat transfer to the cable core 6. The fire-resistant mica layer 2 is used for retarding fire, the polyurethane foam layer 3 is used for expanding gaps to avoid heat accumulation, the ceramic fiber layer 4 is used for insulating heat, and the glass fiber layer 8 is used for further insulating heat to form multiple heat insulation effects. The silicone rubber sheath 1 is burnt through by open fire in the working environment, the fire-resistant mica layer 2, the polyurethane foam layer 3, the ceramic fiber layer 4 and the glass fiber layer 8 can also prevent the fire from spreading to the cable core 6 and reduce the heat to be transferred to the cable core 6, so that the cable can normally work in a high-temperature environment.

Referring to fig. 1, the cable core 6 is a tinned wire, and the tinned wire has good stability under the condition of excellent conductivity, so that the problem that the conductivity of copper is reduced due to oxidation can be solved well, the conductivity of the cable core 6 is guaranteed, and the service life of the cable is prolonged.

Referring to fig. 1, the material of the polyvinyl chloride layer 61 is polyvinyl chloride. The polyvinyl chloride has excellent dielectric property, and can effectively prevent the cable cores 6 from being contacted with each other to generate short circuit. And the yield of the polyvinyl chloride is large, the price is low, and the production cost of the cable can be reduced.

Referring to fig. 1, the supporting frame 9 is a metal frame made of hard material, and the supporting frame 9 includes a diaphragm plate 91 and two longitudinal diaphragm plates 92 fixed at two ends of the diaphragm plate 91. The two cable cores 6 are respectively positioned on two opposite sides of the transverse partition plate 91 and between the two longitudinal partition plates 92, so that the two cable cores 6 cannot be contacted, and the phenomenon that the two cable cores 6 are contacted with each other to cause short circuit when the polyvinyl chloride layer 61 on the outer surface of the cable cores 6 is broken is avoided. Under the support of support frame 9, the difficult bending deformation that takes place of cable has promoted the anti bending property of cable.

Referring to fig. 1, the tensile core 10 may be one of a solid iron wire or a steel wire, which prevents the cable from being deformed or even broken by a tensile force. Two tensile cores 10 are located two longitudinal separators 92 respectively and keep away from one side of horizontal partition 91, promote cable tensile strength from a plurality of positions for the whole tensile strength of cable promotes to some extent. Tensile core 10 combines with support frame 9, can effectual structural strength who promotes the cable, has promoted the life of cable.

The implementation principle of the high-temperature-resistant cable in the embodiment of the application is as follows: the silicon rubber sheath 1 can protect other structures in the cable, and the fireproof coating 11 coated on the outer surface of the silicon rubber sheath 1 can protect the silicon rubber sheath 1, so that the silicon rubber sheath 1 is prevented from being ignited by open fire. The fire-resistant mica layer 2, the polyurethane foam layer 3 and the ceramic fiber layer 4 form multiple flame-retardant and high-temperature-resistant effects, and the temperature inside the glass fiber layer 8 is prevented from being too high. The tinned wire weaving layer 5 can shield the electromagnetic interference generated by the cable core 6, the FEP layer can play an insulating role, and the glass fiber layer 8 further prevents heat from being transferred to the cable core 6. The support frame 9 and the tensile core 10 enhance the structural strength of the cable, and prolong the service life of the cable. Two cable cores 6 are located diaphragm 91 both sides respectively, and all being equipped with polyvinyl chloride layer 61 in every cable core 6 outside, avoid direct contact to lead to the short circuit between the cable core 6.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A high temperature resistant cable, characterized by: including silicone rubber sheath (1), fire-resistant mica layer (2), ceramic fiber layer (4), tinned wire weaving layer (5), insulating layer (7) and cable core (6) that set gradually from outer to inner, it has glass fiber layer (8) to fill in the clearance of cable core (6) and insulating layer (7), be equipped with support frame (9) in glass fiber layer (8).

2. A high temperature resistant cable according to claim 1, wherein: the cable core (6) is a tinned copper wire.

3. A high temperature resistant cable according to claim 2, wherein: the number of the cable cores (6) is two, and the outer surface of each cable core (6) is provided with a polyvinyl chloride layer (61).

4. A high temperature resistant cable according to claim 3, wherein: the supporting frame (9) comprises a diaphragm plate (91), and the two cable cores (6) are respectively positioned on two opposite sides of the diaphragm plate (91).

5. A high temperature resistant cable according to claim 1, wherein: and a tensile core (10) is arranged in the glass fiber layer (8).

6. A high temperature resistant cable according to claim 1, wherein: the insulating layer (7) is an FEP layer.

7. A high temperature resistant cable according to claim 1, wherein: the outer surface of the silicon rubber sheath (1) is coated with a fireproof coating (11).

8. A high temperature resistant cable according to claim 1, wherein: and a polyurethane foam layer (3) is arranged between the fire-resistant mica layer (2) and the ceramic fiber layer (4).