CN115036063A - Double-core layer stranded cable - Google Patents

Abstract

The invention belongs to the field of power cables, and in particular relates to a double-core twisted cable, which is provided with an outer sheath, a plurality of electrical units and a central reinforcement. Outside the unit, it is characterized in that the electric unit is composed of a first power transmission part and a second power transmission part, and the two adjacent electric units are buckled with each other; Simultaneous signal interpretation and other beneficial effects.

Description

A double-core twisted cable

technical field

The invention belongs to the field of cables, and in particular relates to a double-core layer twisted cable.

Background technique

With the large-scale promotion of 5G construction in China, the demand for optical cables is increasing, and operators' requirements for the water seepage performance of optical cables are becoming more and more stringent.

In the prior art, CN213070655U discloses an environment-friendly flame-retardant rubber-sheathed flexible cable, comprising an elliptical double-core signal control body arranged in the center of the cable, and a plurality of ellipses surrounding the central elliptical double-core signal control body. The inner space between several oval-shaped dual-core signal control bodies is filled with flame-retardant filling ropes to form the cable core; the chlorosulfonated polyethylene isolation layer is extruded outside the cable core , The flame-retardant composite tape is wrapped around the chlorosulfonated polyethylene isolation layer, the total shielding layer is wrapped around the flame-retardant tape, and the outer sheath is extruded outside the total shielding layer.

The above-mentioned prior art has the following shortcomings: 1. the electric unit is not easy to peel off, and the construction is inconvenient; 2. the structure is unstable and not round.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to disclose a double-core layer twisted cable, which is realized by adopting the following technical solutions.

A double-core twisted cable, which has an outer sheath, a plurality of electrical units and a central reinforcing member, the electrical unit is twisted outside the central reinforcing member, and the outer sheath is extruded outside the electrical unit, characterized in that the electrical unit is made of The first power transmission part and the second power transmission part are composed, the first power transmission part is composed of a first conductor and a first insulating layer located outside the first conductor, and a left side of the first conductor and the first insulating layer are formed. a first insertion cavity, a first insertion port is formed on the first insulating layer below the first insertion cavity;

The second power transmission component is composed of a second electrical conductor and a second insulating layer outside the second electrical conductor. A second plugging cavity is formed between the right side of the second electrical conductor and the second insulating layer, and the second plugging cavity A second insertion port is formed on the upper second insulating layer;

In a clockwise direction, the first insulating layer above the previous first insertion port is inserted into the second second insertion port, and the first insulating layer above the last first insertion port is inserted into the first second insertion port;

The first insulating layer and the second insulating layer are fixedly connected, the connection points protrude to the inside of the first insulating layer and the second insulating layer respectively, and the connection points are respectively attached to the first conductor and the second conductor to prevent the first conductor from being conductive. The body and the second conductor rotate within the first insulating layer and the second insulating layer to ensure the positions of the first insertion opening and the first insertion cavity, and the second insertion opening and the second insertion cavity.

The above-mentioned double-core twisted cable is characterized in that the first insulating layer and the second insulating layer are integrally formed.

The above-mentioned double-core layer twisted cable is characterized in that at least one signal wire is provided in the protruding portion.

The above-mentioned double-core twisted cable is characterized in that a first limiting member is provided on the inner wall of the first insulating layer on the upper side of the first plugging cavity, and a second limiting member on the lower side of the second plugging cavity is provided. A second limiting member is arranged on the inner wall of the insulating layer; the first limiting member and the second limiting member are mutually limiting.

In the above-mentioned double-core twisted cable, it is characterized in that the material of the first insulating layer is high-density polyethylene or medium-density polyethylene or flame-retardant polyolefin.

In the above-mentioned double-core twisted cable, it is characterized in that the material of the first conductor is copper or aluminum.

In the above-mentioned double-core twisted cable, it is characterized in that the material of the second insulating layer is high-density polyethylene or medium-density polyethylene or flame-retardant polyolefin.

In the above-mentioned double-core twisted cable, it is characterized in that the material of the second conductor is copper or aluminum.

In the above-mentioned double-core twisted cable, it is characterized in that the material of the outer sheath is high-density polyethylene or medium-density polyethylene or flame-retardant polyolefin.

In the above-mentioned double-core stranded cable, it is characterized in that the central reinforcing member is a phosphating steel wire or a stainless steel wire or a glass fiber reinforced plastic rod.

This embodiment has the following beneficial effects:

1. The stability of the cable can be enhanced by using the way that two adjacent electrical units are buckled with each other.

2. The double-core structure is used to prevent the output line and input line from being mixed up during construction wiring, reducing the loss caused by wrong wiring.

3. The first insulating layer 211 and the second insulating layer 221 are non-closed, and the inner conductors can be quickly taken out during construction without special insulating layer stripping tools, which is convenient for construction and improves construction efficiency.

4. The transmission of electric energy and electrical signals in the same cable is realized, and the application scope of the cable is expanded; the connection between the first insulating layer 211 and the second insulating layer 22 is recessed inward, which is convenient for opening the cable and taking out the signal line.

5. The first limiting member 215 and the second limiting member 225 are mutually limited, so that the two adjacent electrical units 2 are not easily separated from each other, thereby enhancing the structural stability of the cable.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of an electrical unit according to Embodiment 1 of the present invention.

FIG. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

FIG. 4 is a schematic structural diagram of an electrical unit according to Embodiment 2 of the present invention.

FIG. 5 is a schematic structural diagram of Embodiment 3 of the present invention.

FIG. 6 is a schematic structural diagram of the combination of adjacent electrical units according to Embodiment 3 of the present invention.

In the figure: 1. Outer sheath, 2. Electric unit, 21. First power transmission component, 211. First insulating layer, 212. First conductor, 213. First insertion cavity, 214. First insertion port, 215 . first limiting member, 22. second power transmission member, 221. second insulating layer, 222. second electrical conductor, 223. second insertion cavity, 224. second insertion port, 225. second limiting member, 23. Connection part, 24. Signal line, 3. Center reinforcement.

Detailed ways

Example 1

Please refer to Figures 1 and 2, a double-core twisted cable, which has an outer sheath 1, a plurality of electrical units 2 and a central reinforcing member 3. The electrical units 2 are twisted outside the central reinforcing member 3, and the outer sheath 1 is extruded. It is molded outside the electric unit 2, and is characterized in that the electric unit 2 is composed of a first power transmission part 21 and a second power transmission part 22, and the first power transmission part 21 consists of a first conductor 212 and is located outside the first conductor 212. The first insulating layer 211 is formed of the first electrical conductor 212, a first plug cavity 213 is formed between the left side of the first conductor 212 and the first insulating layer 211, and a first plug cavity 213 is formed on the first insulating layer 211 under the first plug cavity 213. Insertion port 214;

The second power transmission component 22 is composed of a second conductor 222 and a second insulating layer 221 located outside the second conductor 222. A second plug cavity is formed between the right side of the second conductor 212 and the second insulating layer 221. 223, a second insertion port 224 is formed on the second insulating layer 221 above the second insertion cavity 223;

In the clockwise direction, the first insulating layer 211 above the previous first insertion opening 214 is inserted into the second second insertion opening 224, and the first insulating layer 211 above the last first insertion opening 214 is inserted into the first second insertion opening. within mouth 224;

The first insulating layer 211 and the second insulating layer 221 are integrally formed, and the connection points protrude to the inside of the first insulating layer 211 and the second insulating layer 221 respectively, and the connection points are respectively connected with the first conductor 212 and the second conductor 212. affixed to prevent the first conductor 212 and the second conductor 212 from rotating within the first insulating layer 211 and the second insulating layer 221, ensuring that the first insertion port 214 and the first insertion cavity 213, the second insertion port 224 and the second The position of the socket cavity 223 .

Example 2

Please refer to Fig. 3 and Fig. 4, a double-core twisted cable has an outer sheath 1, a plurality of electrical units 2 and a central reinforcing member 3. The electrical units 2 are twisted outside the central reinforcing member 3, and the outer sheath 1 is extruded. It is molded outside the electric unit 2, and is characterized in that the electric unit 2 is composed of a first power transmission part 21 and a second power transmission part 22, and the first power transmission part 21 consists of a first conductor 212 and is located outside the first conductor 212. The first insulating layer 211 is formed of the first electrical conductor 212, a first plug cavity 213 is formed between the left side of the first conductor 212 and the first insulating layer 211, and a first plug cavity 213 is formed on the first insulating layer 211 under the first plug cavity 213. Insertion port 214;

The second power transmission component 22 is composed of a second conductor 222 and a second insulating layer 221 located outside the second conductor 222. A second plug cavity is formed between the right side of the second conductor 212 and the second insulating layer 221. 223, a second insertion port 224 is formed on the second insulating layer 221 above the second insertion cavity 223;

In the clockwise direction, the first insulating layer 211 above the previous first insertion opening 214 is inserted into the second second insertion opening 224, and the first insulating layer 211 above the last first insertion opening 214 is inserted into the first second insertion opening. within mouth 224;

The first insulating layer 211 and the second insulating layer 221 are integrally formed, and the connection points protrude to the inside of the first insulating layer 211 and the second insulating layer 221 respectively, and the connection points are respectively connected with the first conductor 212 and the second conductor 212. affixed to prevent the first conductor 212 and the second conductor 212 from rotating within the first insulating layer 211 and the second insulating layer 221, ensuring that the first insertion port 214 and the first insertion cavity 213, the second insertion port 224 and the second At the position of the insertion cavity 223, at least one signal line is provided in the protruding portion.

This embodiment realizes the transmission of electric energy and electrical signals in the same cable, which expands the application scope of the cable; the connection between the first insulating layer 211 and the second insulating layer 22 is recessed inwards, which is convenient for cabling to take out the signal wires therein.

Example 3

Please refer to Figure 5 and Figure 6, a double-core twisted cable has an outer sheath 1, a plurality of electrical units 2 and a central reinforcement 3. The electrical units 2 are twisted outside the central reinforcement 3, and the outer sheath 1 is extruded. It is molded outside the electric unit 2, and is characterized in that the electric unit 2 is composed of a first power transmission part 21 and a second power transmission part 22, and the first power transmission part 21 consists of a first conductor 212 and is located outside the first conductor 212. The first insulating layer 211 is formed of the first electrical conductor 212, a first plug cavity 213 is formed between the left side of the first conductor 212 and the first insulating layer 211, and a first plug cavity 213 is formed on the first insulating layer 211 under the first plug cavity 213. Insertion port 214;

The second power transmission component 22 is composed of a second conductor 222 and a second insulating layer 221 located outside the second conductor 222. A second plug cavity is formed between the right side of the second conductor 212 and the second insulating layer 221. 223, a second insertion port 224 is formed on the second insulating layer 221 above the second insertion cavity 223;

A first limiting member 215 is provided on the inner wall of the first insulating layer 211 on the upper side of the first plugging cavity 213 , and a second limiting member 215 is provided on the inner wall of the second insulating layer 221 on the lower side of the second plugging cavity 223 . bit component 225;

In the clockwise direction, the first insulating layer 211 above the previous first insertion opening 214 is inserted into the second second insertion opening 224, and the first insulating layer 211 above the last first insertion opening 214 is inserted into the first second insertion opening. In the mouth 224, the first limiting member 215 and the second limiting member 225 limit each other;

The first insulating layer 211 and the second insulating layer 221 are integrally formed, and the connection points protrude to the inside of the first insulating layer 211 and the second insulating layer 221 respectively, and the connection points are respectively connected with the first conductor 212 and the second conductor 212. affixed to prevent the first conductor 212 and the second conductor 212 from rotating within the first insulating layer 211 and the second insulating layer 221, ensuring that the first insertion port 214 and the first insertion cavity 213, the second insertion port 224 and the second The position of the socket cavity 223 .

In this embodiment, the first limiting member 215 and the second limiting member 225 limit each other, so that the two adjacent electrical units 2 are not easily separated from each other, thereby enhancing the structural stability of the cable.

In a double-core twisted cable according to any of the above embodiments, the material of the first insulating layer 211 is high-density polyethylene, medium-density polyethylene or flame-retardant polyolefin.

In a double-core twisted cable according to any of the above embodiments, it is characterized in that the material of the first conductor 212 is copper or aluminum.

In a double-core twisted cable according to any of the above embodiments, the material of the second insulating layer 221 is high-density polyethylene, medium-density polyethylene or flame-retardant polyolefin.

In any of the above-mentioned double-core twisted cables, it is characterized in that the material of the second conductor 222 is copper or aluminum.

In a double-core twisted cable according to any of the above embodiments, it is characterized in that the material of the outer sheath 1 is high-density polyethylene, medium-density polyethylene or flame-retardant polyolefin.

In a double-core stranded cable according to any of the above embodiments, it is characterized in that the central reinforcing member 3 is a phosphating steel wire or a stainless steel wire or a glass fiber reinforced plastic rod.

In the present invention, the stability of the cable can be enhanced by adopting the method that two adjacent electrical units are connected to each other; the double-core structure is adopted, so that the output wire and the input wire will not be mixed up during the wiring construction, reducing the damage caused by the wrong wire connection. The first insulating layer 211 and the second insulating layer 221 are non-closed, and the inner conductor can be quickly taken out during construction without special insulating layer stripping tools, which is convenient for construction and improves construction efficiency.

The invention solves the problems in the prior art that the electric unit is not easy to be peeled off, the construction is inconvenient and the structure is unstable.

The above-mentioned embodiments are only preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The protection scope of the present invention shall take the technical solutions described in the claims, including the equivalent alternatives of the technical features in the technical solutions described in the claims, as the protection scope. That is, equivalent replacements and improvements within this scope are also within the protection scope of the present invention.

Claims (10)

1. A double-core stranded cable is provided with an outer protective layer (1), a plurality of electric units (2) and a central reinforcing piece (3), wherein the electric units (2) are stranded outside the central reinforcing piece (3), the outer protective layer (1) is extruded outside the electric units (2), and the double-core stranded cable is characterized in that the electric units (2) are composed of a first power transmission part (21) and a second power transmission part (22), the first power transmission part (21) is composed of a first electric conductor (212) and a first insulating layer (211) positioned outside the first electric conductor (212), a first inserting cavity (213) is formed between the left side of the first electric conductor (212) and the first insulating layer (211), and a first inserting opening (214) is formed on the first insulating layer (211) below the first inserting cavity (213);

the second power transmission component (22) is composed of a second conductor (222) and a second insulating layer (221) positioned outside the second conductor (222), a second inserting cavity (223) is formed between the right side of the second conductor (212) and the second insulating layer (221), and a second inserting opening (224) is formed in the second insulating layer (221) above the second inserting cavity (223);

in the clockwise direction, the first insulating layer (211) above the previous first insertion opening (214) is inserted into the next second insertion opening (224), and the first insulating layer (211) above the last first insertion opening (214) is inserted into the first second insertion opening (224);

the first insulating layer (211) and the second insulating layer (221) are fixedly connected, the connection positions respectively protrude towards the inside of the first insulating layer (211) and the inside of the second insulating layer (221), and the connection positions are respectively attached to the first conductor (212) and the second conductor (212).

2. A twisted double core cable according to claim 1, wherein said first insulating layer (211) and said second insulating layer (221) are integrally formed.

3. A twisted double core cable according to claim 1 or claim 2, wherein at least one signal line is provided in the protruding portion.

4. A twisted pair cable as claimed in claim 3, wherein a first stopper (215) is provided on the inner wall of the first insulating layer (211) on the upper side of the first splicing chamber (213), and a second stopper (225) is provided on the inner wall of the second insulating layer (221) on the lower side of the second splicing chamber (223); the first limiting part (215) and the second limiting part (225) limit each other.

5. A twisted double core cable according to claim 4, wherein the material of the first insulating layer (211) is high density polyethylene or medium density polyethylene or a flame retardant polyolefin.

6. A twisted double core cable according to claim 5, wherein said first electrical conductor (212) is made of copper or aluminum.

7. A twisted double core cable according to claim 6, wherein the material of the second insulating layer (221) is high density polyethylene or medium density polyethylene or a flame retardant polyolefin.

8. A twisted double core cable according to claim 7, wherein said second electrical conductor (222) is made of copper or aluminum.

9. A twisted double core cable according to claim 8, wherein the outer sheath (1) is made of high density polyethylene or medium density polyethylene or a flame retardant polyolefin.

10. A twisted double core cable according to claim 9, wherein said central strength member (3) is a phosphated steel wire or a stainless steel wire or a glass fiber reinforced plastic rod.

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