CN216084359U - Power cable not easy to break - Google Patents

Abstract

The utility model relates to the technical field of power cables, and discloses a power cable not easy to break, which comprises a cable core, the outside of the cable core is fixedly provided with an insulating sleeve, the outside of the cable core is wrapped with non-woven fabrics, the space between the non-woven fabric and the cable core is filled with insulating rubber, the outer side of the non-woven fabric is fixedly connected with an elastic layer, the elastic layer is internally provided with glass fiber yarns in an annular array, the glass fiber yarns are an inorganic non-metallic material with excellent performance and are usually used as a reinforcing material in a composite material, the strength of the glass fiber yarn is high and the glass fiber yarn has flexibility, and the strength of the glass fiber yarn is enhanced along with the reduction of the diameter of the glass fiber yarn, furthermore, the glass fiber yarn has very many physical properties, such as high tensile strength, small elongation, high elastic modulus, excellent rigidity, etc., and the glass fiber yarn has a large elongation amount within the elastic limit and high tensile strength. The utility model solves the problem that the cable is easy to bend and break.

Description

Power cable not easy to break

Technical Field

The utility model relates to the technical field of power cables, in particular to a power cable not easy to break.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. The use of power cables has been in the past for over a hundred years. In 1879, the american inventor t.a. edison wrapped jute around a copper rod and threaded it into an iron pipe, which was then filled with an asphalt mixture to make a cable. He laid this cable in new york, opening up underground power transmission. In the next year, England Callund invented pitch impregnated paper insulated power cable. In 1889, 10 kv oil-impregnated paper insulated cables were laid between london and delford in the english s.z. fran ladder. In 1908, a 20 kv cable network was built in the uk. Power cables are finding wider and wider application. In 1911, germany was laid down for 60 kv high voltage cables, and the development of high voltage cables was started. In 1913, german m. hoxistet developed a split-phase shielded cable, which improved the electric field distribution inside the cable, eliminated the tangential stress of the insulating surface, and became a milestone in the development of power cables. In 1952, 380 kv ultrahigh voltage cables were laid in north power plants in sweden, and the application of the ultrahigh voltage cables was realized. The proportion of the 1100 kV and 1200 kV extra-high voltage power cables in power lines is gradually increased by the 80 s. The power cable is a cable product used for transmitting and distributing high-power electric energy in a main line of a power system, and comprises various voltage grades of 1-500KV and above and various insulated power cables, and the traditional power cable is easy to break in the using process, so that how to manufacture a novel cable which is not easy to break becomes one of the exploration directions of modern cables.

Disclosure of Invention

The utility model aims to provide a power cable which is not easy to break, and the purpose of solving the problems in the background technology is achieved.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a power cable of difficult rupture, includes the cable core, the outside fixed mounting of cable core has insulating cover, the outside parcel of cable core has the non-woven fabrics, the space packing between non-woven fabrics and the cable core has insulating rubber, the outside fixedly connected with elastic layer of non-woven fabrics.

Preferably, the inside of elastic layer is the annular array and is provided with the glass fiber silk, the glass fiber silk is the inorganic non-metallic material of a performance excellence, usually as the reinforcing material in the combined material, and the intensity of glass fiber silk is very big and have the compliance, and the intensity of glass fiber silk strengthens along with diminishing of its diameter, and the glass fiber silk has very much physical properties, for example tensile strength is high, the extension is little, the elasticity coefficient is high, rigidity is good etc., and the glass fiber silk is big and tensile strength is high in the elasticity limit, can absorb impact energy big, can guarantee that the impact force that inside cable core received is fully reduced when using in the elastic layer, also can make crooked cable core in time reset, reduce the bending time of cable core, avoid cable core rupture.

Preferably, the outside fixedly connected with mica tape on elastic layer, the outside fixedly connected with copper tape of mica tape, copper wire belt have high rigidity and can guarantee that the cable core bears great pressure, guarantee that the cable core stably works in various operational environment, the outside fixedly connected with protective layer in copper tape, protective layer can effectively avoid the copper tape to receive the friction and the attenuation, also can completely cut off air and other structures inside the cable, the inside working of plastics of oxygen oxidation in the surface air.

Preferably, the thickness of the copper wire belt is greater than five zero millimeters, so that the copper wire belt has enough strength, and the pressure bearing capacity of the whole cable is prevented from being reduced due to the small thickness of the copper wire belt.

Preferably, the insulating rubber is filled with nitrogen, so that the elasticity of the insulating rubber is increased, the whole cable has high elasticity, and the cable can be quickly reset by the elasticity of the cable after being bent.

Preferably, the insulating rubber is made of chloroprene rubber, and the chloroprene rubber has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance and chemical reagent resistance, has high tensile strength, elongation and reversible crystallinity, and has good adhesion. Aging resistance and heat resistance. The cable has excellent oil resistance and chemical corrosion resistance, and can be ensured to be stable in various working environments.

Preferably, the mica tape is a synthetic mica tape which has good insulating property and high temperature resistance, and when the mica tape is used in a cable product, the mica tape can isolate high temperature and is safer without volatilization of harmful smoke when burning in open fire.

The utility model provides a power cable which is not easy to break. The method has the following beneficial effects:

(1) according to the utility model, by arranging the insulating rubber, the elastic layer and the glass fiber yarns, after the cable is bent, the insulating rubber is firstly bent, the bent insulating rubber has larger reset elasticity to force the cable to reset, meanwhile, the elastic layer and the glass fiber yarns are mutually matched, the glass fiber yarns of the stretched elastic layer machine have the tendency of retracting, the glass fiber yarns of the compressed elastic layer machine have the tendency of pushing outwards, the elastic layer and the glass fiber yarns can quickly reset the bent cable, and the cable is ensured not to be bent and broken easily.

(2) According to the utility model, the anti-friction capability of the whole cable is improved by arranging the copper ribbon and the protective layer, and meanwhile, the compression resistance degree of the whole cable is improved by the rigidity of the copper ribbon, so that the cable can adapt to different cooperation environments.

Drawings

FIG. 1 is a side cross-sectional view of the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

FIG. 3 is a cross-sectional view of an elastic layer of the present invention;

fig. 4 is a structural view of the copper wire tape of the present invention.

In the figure: 1. a cable core; 2. an insulating sleeve; 3. a flame retardant rubber; 4. non-woven fabrics; 5. an elastic layer; 6. glass fiber yarns; 7. mica tapes; 8. a copper wire band; 9. and a protective layer.

Detailed Description

As shown in fig. 1 to 4, the present invention provides a technical solution: the utility model provides a power cable of difficult rupture, including cable core 1, the outside fixed mounting of cable core 1 has insulating cover 2, the outside parcel of cable core 1 has non-woven fabrics 4, space packing between non-woven fabrics 4 and the cable core 1 has insulating rubber 3, 3 inside packings of insulating rubber have nitrogen gas, insulating rubber's elasticity has been increased promptly, make whole cable have great elasticity, guarantee that the cable can rely on self elasticity to reset rapidly after the bending, insulating rubber 3's material is chloroprene rubber, chloroprene rubber has good physical and mechanical properties, resistant oil, heat-resisting, fire-resistant, sunlight-resistant, ozone-resistant, acid and alkali-resistant, chemical reagent resistant, higher tensile strength has, elongation and reversible crystallinity, the adhesion is good. Aging resistance and heat resistance. The cable is resistant to oil and chemical corrosion and can be kept stable in various working environments, an elastic layer is fixedly connected to the outer side of the non-woven fabric 4, the glass fiber yarns 6 are arranged in the elastic layer 5 in an annular array, the glass fiber yarns 6 are inorganic non-metallic materials with excellent performance and are usually used as reinforcing materials in composite materials, the glass fiber yarns 6 are high in strength and flexible, the strength of the glass fiber yarns 6 is enhanced along with the reduction of the diameter of the glass fiber yarns, the glass fiber yarns 6 have extremely large physical properties such as high tensile strength, small elongation, high elastic coefficient, good rigidity and the like, the glass fiber yarns 6 are large in elongation and high in tensile strength within the elastic limit, can absorb large impact energy, can ensure that the impact force applied to the inner cable core 1 is sufficiently reduced when the cable core is used in the elastic layer, and can enable the bent cable core 1 to be timely reset, the bending time of the cable core 1 is shortened, the cable core 1 is prevented from being broken, the mica tape 7 is fixedly connected to the outer portion of the elastic layer 5, the mica tape 7 is a synthetic mica tape, the synthetic mica tape has good insulating property and high temperature resistance, when the mica tape is used in a cable product, high temperature can be isolated, meanwhile, volatilization of harmful smoke is not safe when the mica tape is burnt by naked fire, the copper wire tape 8 is fixedly connected to the outer portion of the mica tape 7, the thickness of the copper wire tape 8 is larger than five millimeters at zero, enough strength of the copper wire tape 8 is ensured, the pressure bearing capacity of the whole cable is prevented from being reduced due to the small thickness of the copper wire tape 8, the copper wire tape 8 has high rigidity, the cable core 1 can be ensured to bear large pressure, the cable core 1 can be ensured to stably work in various working environments, the protective layer 9 is fixedly connected to the outer portion of the copper wire tape 8, the protective layer 9 can effectively prevent the copper ribbon 8 from being rubbed and thinned, and can isolate air from other structures inside the cable, oxygen in surface air oxidizes plastic parts inside the cable, by arranging the insulating rubber 3, the elastic layer 5 and the glass fiber 6, after the cable is bent, firstly, the insulating rubber 3 is bent, the bent insulating rubber 3 has larger reset elasticity to force the cable to reset, meanwhile, the elastic layer 5 and the glass fiber 6 are matched with each other, the stretched elastic layer 5 and the glass fiber 6 have the tendency of retraction, the compressed elastic layer 5 and the glass fiber 6 push outwards, the elastic layer 5 and the glass fiber 6 can enable the bent cable to reset rapidly, the anti-friction capability of the whole cable is improved by arranging the copper ribbon 8 and the protective layer 9, and meanwhile, the rigidity of the copper ribbon 8 also enables the compression resistance degree of the whole cable to be improved very high, the cable can be ensured to adapt to different cooperation environments.

When the cable core bending device is used, the insulating sleeve 2 wraps the cable core 1, the insulating sleeve 2 ensures that the cable cores 1 cannot influence each other, then the non-woven fabric 4 wraps the outer sides of the cable cores 1, the non-woven fabric 4 wraps the cable cores 1 together, meanwhile, the non-woven fabric 4 has no direction and has similar longitudinal and transverse strength, so that the non-woven fabric 4 can enable the cable cores 1 to be pulled in the longitudinal and transverse directions to be similar to ensure that the cable cores 1 can be rapidly reset after being bent, meanwhile, the non-woven fabric 4 is filled with the flame retardant rubber 3, the flame retardant rubber 3 is made of chloroprene rubber, the chloroprene rubber has good physical and mechanical properties and has high tensile strength and elongation and certain elasticity, therefore, the flame retardant rubber 3 wrapped by the non-woven fabric 4 can be bent along with the cable cores 1 after the cable cores 1 are bent, and can reset under the effect of the elastic flame retardant rubber 3 after the cable core 1 is bent, and the bending degree of the cable core 1 is larger, the reset elastic force of the flame retardant rubber 3 is larger, meanwhile, the elastic layer 5 wrapped outside the non-woven fabric 4 can buffer the pressure applied to the cable core 1 from the outside, and simultaneously, the bent cable core 1 can reset to a certain extent due to the self elastic force, meanwhile, the glass fiber yarn 6 machine arranged inside the elastic layer 5 has incombustibility and also has strong tensile strength and elastic coefficient, so that the cable core 1 can reset rapidly under the pulling of a plurality of glass fiber yarns 6 after being bent, the bending time of the cable core 1 is reduced, the mica tape 7 wrapped outside the elastic layer 5 has excellent flame resistance and high temperature resistance, and other cable structures inside the mica tape 7 can be protected to work under the relatively stable condition, simultaneously the copper wire area 8 in the 7 outsides in mica tape can guarantee that the cable can bear great pressure and be difficult for being flattened for other structures of the inside cable of copper tape 8 can not destroyed easily by external world, the parcel can completely cut off the contact of outside air and other structures of the inside of cable at the outside protective layer 9 of copper tape 8, can effectively prevent the oxidation of elastic layer 5 and fire-retardant rubber 3, also can reduce the friction that copper tape 8 received simultaneously, guarantee that copper tape 8 possess sufficient thickness all the time.

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

Claims (7)

1. The utility model provides a power cable that is difficult for rupture, includes cable core (1), its characterized in that: the cable comprises a cable core (1), and is characterized in that an insulating sleeve (2) is fixedly arranged outside the cable core (1), a non-woven fabric (4) is wrapped outside the cable core (1), insulating rubber (3) is filled in a space between the non-woven fabric (4) and the cable core (1), and an elastic layer (5) is fixedly connected to the outer side of the non-woven fabric (4).

2. A non-frangible power cable as claimed in claim 1, wherein: the elastic layer (5) is internally provided with glass fiber yarns (6) in an annular array.

3. A non-frangible power cable as claimed in claim 1, wherein: the mica tape (7) is fixedly connected to the outer portion of the elastic layer (5), the copper wire tape (8) is fixedly connected to the outer portion of the mica tape (7), and the protective layer (9) is fixedly connected to the outer portion of the copper wire tape (8).

4. A non-frangible power cable as claimed in claim 3, wherein: the thickness of the copper wire belt (8) is more than five tenths of millimeters.

5. A non-frangible power cable as claimed in claim 1, wherein: the insulating rubber (3) is filled with nitrogen.

6. A non-frangible power cable as claimed in claim 1, wherein: the insulating rubber (3) is made of chloroprene rubber.

7. A non-frangible power cable as claimed in claim 3, wherein: the mica tape (7) is a synthetic mica tape.

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