CN215298897U

CN215298897U - Impact-resistant lightning-proof grounding environment-friendly flexible cable

Info

Publication number: CN215298897U
Application number: CN202121777914.0U
Authority: CN
Inventors: 程斌; 李沿; 张林锐; 华健; 蒋晶晶; 周佩; 李中义
Original assignee: Wuxi Huamei Cable Co ltd
Current assignee: Wuxi Huamei Cable Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-12-24
Anticipated expiration: 2031-08-02

Abstract

The utility model relates to the technical field of cables, particularly, relate to shock-resistant lightning grounding environmental protection flexible cable, include: the filling layer and the conductor layer are distributed at intervals from inside to outside; the polyester tape is wrapped on the outer side of the outermost conductor layer; the waterproof layer is wrapped on the outer side of the polyester tape wrapping layer and is used for moisture insulation; the flame-retardant filling layer is wrapped on the outer side of the waterproof layer and is used for flame retardance; the outer sheath is coated on the outer side of the flame-retardant filling layer; the setting is the cable core that is concentric ring distribution, avoids circular cross section's cable core to lead core center resistance increase when taking place the skin effect, and when earthing cable received the instantaneous current impact of thunder and lightning, the skin effect will appear in the cable core, and the electric current can be along inner conductor layer and outer conductor layer conduction, because the centre of conductor layer sets up insulating the packing, can increase the compliance of cable, can also avoid leading the core center the condition that resistance increase leads to the cable to puncture.

Description

Impact-resistant lightning-proof grounding environment-friendly flexible cable

Technical Field

The utility model relates to the technical field of cables, particularly, relate to impact-resistant lightning grounding environmental protection flexible cable.

Background

The ground wire used in the electrical equipment aims to be connected with parts such as a shell of the electrical equipment and a circuit for leading out unsafe electric charges or leakage current generated due to various reasons, the shell of the electrical equipment has certain static electricity due to poor insulation performance or moist using environment, an electric shock accident can occur in serious cases, in order to avoid the accident, a wire can be connected to the metal shell of the electrical equipment, the other end of the wire is connected to the ground, and the static electricity can be brought to the ground by the ground wire to be released once the electrical equipment leaks electricity.

In the existing cable design, in order to ensure the electric conduction flux of the conductor structure, a concentric regular twisting mode is generally adopted, and the arrangement mode is 1+6+12+18+24, and once a lightning strike is received, the cable has a skin effect, that is, the current density near the surface of the conductor is large, and the current density in the center of the conductor is small, so that the resistance of the conductor is increased, the heat is increased, the cable is punctured, and accessories are damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel impact-resistant lightning grounding environmental protection flexible cable, include: the filling layer and the conductor layer are distributed at intervals from inside to outside; the polyester tape is wrapped on the outer side of the outermost conductor layer; the waterproof layer is wrapped on the outer side of the polyester tape wrapping layer and is used for moisture insulation; the flame-retardant filling layer is wrapped on the outer side of the waterproof layer and is used for flame retardance; the outer sheath is coated on the outer side of the flame-retardant filling layer; wherein, the conductor layer includes inner conductor layer, connecting conductor layer and outer conductor layer, the filling layer is including the insulating filling core that is located the intermediate position and being located insulating filling layer between inner conductor layer, the outer conductor layer, the inner conductor layer transposition is around establishing the outside of insulating filling core, insulating filling layer is around the package in the outside of inner conductor layer, the outer conductor layer transposition is around establishing the outside of insulating filling layer, along having seted up around the package direction on the week lateral wall of insulating filling layer and holding connecting conductor layer's disconnected groove makes inner conductor layer and outer conductor layer are concentric circles and distribute and pass through each other connecting conductor layer electric conductance is to when reducing the skin effect of taking place the resistance of conductor layer.

Further, the winding directions of the inner conductor layer and the outer conductor layer are both right, and the connecting conductor layer is located between the inner conductor layer and the outer conductor layer and is wound leftwards.

Further, the insulating filling core, the insulating filling layer and the outer sheath are all made of cross-linked polyethylene insulating materials.

Further, the winding direction of the insulation filling layer is opposite to that of the inner conductor layer and the outer conductor layer, and is the same as that of the connection conductor layer.

Furthermore, six groups of deformation holes which are distributed in a centrosymmetric mode are formed in the insulating filling core, and the sectional area of each deformation hole is 1/10-1/8 of that of the insulating filling core.

Further, the flame-retardant filling layer comprises a plurality of flame-retardant fiber ropes wrapped on the outer side of the waterproof layer, and the wrapping carrying rate of the flame-retardant filling layer is 70% -85%.

Further, the conductor layer is composed of any one of copper wires, alloy copper wires, aluminum wires or alloy aluminum wires.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments in accordance with the teachings of the present invention.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of an exemplary embodiment of the present invention.

Fig. 2 is a schematic diagram of a side-view exemplary embodiment of the present invention.

Fig. 3 is a perspective view of an exemplary embodiment of fig. 2.

Fig. 4 is a schematic diagram of an exemplary embodiment of a conductive layer of the present invention.

Detailed Description

For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

In connection with the examples shown in fig. 1-4, it is intended to change the cross-sectional shape of the cable core so as to reduce the resistance of the cable core when the cable core exhibits the "skin effect". By this purpose's realization, the utility model provides an impact-resistant lightning grounding environmental protection flexible cable leads the core through the cable that the setting is concentric ring distribution, leads core center resistance increase when avoiding circular cross section's cable to lead the core to take place skin effect, especially the utility model discloses the conductive layer 3 of configuration, including inner conductor layer 31 and the outer conductor layer 33 that is concentric ring distribution, connecting conductor layer 32 is used for connecting inner conductor layer 31 and outer conductor layer 33 electricity, when earthing cable receives the instantaneous current impact of thunder and lightning, the cable is led the core and "skin effect" will appear, and the electric current can be along inner conductor layer 31 and outer conductor layer 33 conduction, because the centre of conductive layer 3 sets up insulating the packing, can increase the compliance of cable, can also avoid leading core center appearance resistance increase to lead to the condition that the cable punctures.

Impact-resistant lightning grounding environmental protection flexible cable includes: the packaging structure comprises a filling layer and a conductor layer 3 which are distributed from inside to outside at intervals, a polyester tape winding cladding layer 5, a waterproof layer 6, a flame-retardant filling layer 7 and an outer sheath 8.

Referring to fig. 2, the polyester tape wrapping layer 5 wraps the outermost conductor layer 3 leftwards, the waterproof layer 6 may be an insulating water-blocking tape, and wraps the polyester tape wrapping layer 5 in the same direction and is used for moisture insulation, the flame-retardant filling layer 7 wraps the waterproof layer 6 and is used for flame retardation, and the outer sheath 8 wraps the flame-retardant filling layer 7.

In a preferred embodiment, the flame-retardant filling layer 7 can adopt a plurality of flame-retardant fiber ropes wrapped outside the waterproof layer 6, the wrapping carrying rate of the flame-retardant filling layer 7 is 70% -85%, the flame-retardant fiber ropes can adopt glass fiber ropes and are arranged between the waterproof layer 6 and the outer sheath 8, when the fire is on outside or inside, the flame-retardant effect can be achieved, the flame-retardant fiber ropes can absorb certain moisture, the moisture is prevented from continuously permeating inwards under the obstruction of the waterproof layer 6, the friction force between the inner layer and the outer sheath 8 can be increased through the flame-retardant fiber ropes, and the slipping between the inner layer and the outer sheath 8 is prevented.

As shown in fig. 1 and 2, the conductor layer 3 includes an inner conductor layer 31, a connecting conductor layer 32, and an outer conductor layer 33, and the filling layer includes an insulating filling core 1 at an intermediate position and an insulating filling layer 4 between the inner conductor layer 31 and the outer conductor layer 33.

In a preferred embodiment, the insulating filling core 1, the insulating filling layer 4 and the outer sheath 8 are all made of cross-linked polyethylene insulating materials, and have the properties of light weight, good heat resistance, strong load capacity, no melting, chemical corrosion resistance and high mechanical strength, the conductor layer 3 can be a guide core made of any one of copper wires, alloy copper wires, aluminum wires or alloy aluminum wires, and the sectional area of the guide core is set according to the use requirement.

Further, the transposition of inner conductor layer 31 is around establishing in the outside of insulating filler core 1, and insulating filling layer 4 is around the outside at inner conductor layer 31, and outer conductor layer 33 transposition is around establishing in the outside of insulating filling layer 4, follows on the all sides wall of insulating filling layer 4 and sets up the disconnected groove 41 that holds connecting conductor layer 32 around the package direction, makes inner conductor layer 31 and outer conductor layer 33 be concentric circles distribution and each other through connecting conductor layer 32 electric conductance to reduce the resistance of conductor layer 3 when taking place the skin effect.

In a preferred embodiment, the inner conductor layer 31 and the outer conductor layer 33 are both configured as a single-layer or multi-layer coiled conductor, the wrapping angle of the inner conductor layer 31 and the outer conductor layer 33 is between 35 ° and 45 °, the wrapping directions of the inner conductor layer 31 and the outer conductor layer 33 are both right, the connecting conductor layer 32 is located between the inner conductor layer 31 and the outer conductor layer 33 and is wrapped leftward, the wrapping angle of the connecting conductor layer 32 is between 50 ° and 60 °, and the connecting conductor layer can be limited in the breaking groove 41 by the insulation filling layer 4 to achieve the function of electrically connecting the inner conductor layer 31 and the outer conductor layer 33.

So, when the earthing cable receives the instantaneous current impact of thunder and lightning, the cable is led the core and will appear "skin effect", and the electric current can be along

inner conductor layer

31 and 33 conductions of outer conductor layer, with the quick water conservancy diversion of electric current to ground, and the condition that middle part resistance increase punctures the cable can not appear yet to cable lead core hollow structure.

Further, the winding direction of the insulating filling layer 4 is opposite to the winding direction of the inner conductor layer 31 and the outer conductor layer 33, and the winding direction of the insulating filling layer 4 is the same as the winding direction of the connecting conductor layer 32, the insulating filling layer 4 plays a role in spacing and insulating between the inner conductor layer 31 and the outer conductor layer 33, the position of the connecting conductor layer 32 can be limited, a supporting and shape fixing effect is achieved, and the insulating filling core 1 and the insulating filling layer 4 enable the whole cable to be more flexible.

As shown in the combined figure 1, six groups of deformation holes 2 which are distributed in a centrosymmetric manner are formed in the insulating filling core 1, and the sectional area of each deformation hole 2 is 1/10-1/8 of that of the insulating filling core 1.

In a preferred embodiment, the deformation hole 2 can be circular, oval or fan-shaped, which provides a deformation space for the insulating filling core 1 to bend, so that the insulating filling core 1 can be bent more easily, and the cable is more flexible as a whole.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.

Claims

1. The utility model provides an impact-resistant lightning grounding environmental protection flexible cable which characterized in that includes:

the filling layer and the conductor layer are distributed at intervals from inside to outside;

the polyester tape is wrapped on the outer side of the outermost conductor layer;

the waterproof layer is wrapped on the outer side of the polyester tape wrapping layer and is used for moisture insulation;

the flame-retardant filling layer is wrapped on the outer side of the waterproof layer and is used for flame retardance;

the outer sheath is coated on the outer side of the flame-retardant filling layer;

wherein the conductor layer comprises an inner conductor layer, a connecting conductor layer and an outer conductor layer;

the filling layer is including the insulating filling core that is located the intermediate position and being located insulating filling layer between inner conductor layer, the outer conductor layer, the inner conductor layer transposition is around establishing the outside of insulating filling core, insulating filling layer is around the package in the outside of inner conductor layer, the outer conductor layer transposition is around establishing the outside of insulating filling layer, along having seted up around the package direction on the week lateral wall of insulating filling layer and holding connecting conductor layer's broken groove makes inner conductor layer and outer conductor layer are concentric circles and distribute and each other through can connecting conductor layer electric conduction to when reducing the skin effect of taking place the resistance of conductor layer.

2. The impact-resistant, lightning-proof, environmentally friendly flexible cable of claim 1, wherein the inner conductor layer and the outer conductor layer are wound in both directions to the right, and the connecting conductor layer is located between the inner conductor layer and the outer conductor layer and is wound in the directions to the left.

3. The impact-resistant, lightning-proof, grounded and environmentally friendly flexible cable as recited in claim 1, wherein the insulating filler core, the insulating filler layer and the outer sheath are all cross-linked polyethylene insulating materials.

4. The impact-resistant, lightning-proof, environment-friendly flexible cable according to claim 1, wherein the insulation filling layer is wound in a direction opposite to the winding direction of the inner conductor layer and the outer conductor layer and in the same winding direction as the connection conductor layer.

5. The impact-resistant, lightning-proof, grounding and environment-friendly flexible cable as claimed in claim 1, wherein six groups of deformation holes are formed inside the insulating filling core, and the deformation holes are distributed in a centrosymmetric manner.

6. The impact-resistant, lightning-proof, environment-friendly flexible cable according to claim 5, wherein the cross-sectional area of the deformation hole is 1/10-1/8 of the cross-sectional area of the insulation filler core.

7. The impact-resistant lightning-proof grounding environment-friendly flexible cable according to claim 1, wherein the flame-retardant filling layer comprises a plurality of flame-retardant fiber ropes wrapped outside the waterproof layer, and the wrapping carrying rate of the flame-retardant filling layer is 70-85%.

8. The impact-resistant, lightning-proof, grounded and environment-friendly flexible cable according to any one of claims 1 to 7, wherein the conductor layer is composed of any one of copper wires, alloy copper wires, aluminum wires or alloy aluminum wires.