CN217485107U - Prevent ftractureing and prevent loose flexible cable - Google Patents

Abstract

The invention provides an anti-cracking and anti-loosening flexible cable, which comprises a stranded conductor formed by stranding a plurality of strands in a regular stranding way; the folded yarn is formed by twisting a plurality of conductor monofilaments; a protective layer structure is coated outside the stranded conductor; the stranded conductor includes an inner core strand portion and an outer layer strand portion. The inner core strand part comprises a central strand and a plurality of peripheral strands on the periphery of the central strand, and the peripheral strands are uniformly distributed in the center of the central strand. The strands in the outer layer strand part are uniformly distributed in the center of the inner core strand part. The cable provided by the invention has good overall stability, stable service performance and high reliability, and effectively overcomes the defects of yarn throwing, strand jumping, looseness and the like caused by twisting of the stranded wires of the cable bundle yarns in the prior art.

Description

Prevent ftractureing and prevent loose flexible cable

Technical Field

The invention belongs to the technical field of electric wires and cables, and particularly relates to a flexible cable capable of preventing cracking and loosening.

Background

In urban construction and development, electric energy as a main energy source is indispensable, and since the electric energy is less lost in the transmission process as the voltage is higher, a high voltage is inevitably adopted for line transmission in the electric energy transmission process, and in a high-voltage and low-voltage circuit, each electric appliance part is generally electrically connected by a connecting cable, and the service performance of the cable is very strict, for example, a transformer used in the process of mutually converting the high voltage and the low voltage has extremely strict wiring requirements on each electric appliance connecting part of the transformer. The cable for connection in the prior art is easy to throw and jump, and after the cable is used for a period of time, the sheath is easy to crack, so that the cable core is loose and exposed, and the normal use is influenced. Therefore, there is a need for improvements to existing cables.

Disclosure of Invention

In view of the above, the present invention provides a flexible cable with crack and loose prevention, which overcomes the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a prevent ftractureing and prevent loose flexible cable which characterized in that: comprises a stranded conductor formed by twisting a plurality of strands in a regular twisting manner; the folded yarn is formed by twisting a plurality of conductor monofilaments; a protective layer structure is coated outside the stranded conductor; the stranded conductor comprises an inner core strand part and an outer layer strand part, wherein the inner core strand part comprises a central strand and a plurality of peripheral strands on the periphery of the central strand, and the peripheral strands are uniformly distributed in the center of the central strand.

Further, the protective layer structure includes an insulating layer. By way of example, the insulating layer is made of a flexible polyvinyl chloride transparent insulating material at 105 ℃.

Furthermore, hemp or glass fiber is filled between every two strands.

Furthermore, the conductor monofilament adopts 0.15mm annealed copper wire.

Further, the folded yarn is formed by twisting 1+6 conductor monofilament bundles which are regularly arranged.

Furthermore, the strands in the outer layer strand part are uniformly distributed in the center of the inner core strand part.

Furthermore, the outer side of the inner core strand part is coated with a first wrapping layer, and the outer side of the outer layer strand part is coated with a second wrapping layer

Compared with the prior art, the invention has the following advantages:

the cable provided by the invention is easy to form and bend, high in resilience, high in normal working temperature resistance, good in overall stability, stable in service performance and high in reliability, and effectively overcomes the defects of throwing, jumping, looseness, poor resilience and the like caused by twisting of the plied yarns of the cable harness wires in the prior art.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and the description of the illustrative embodiments of the invention and the description of the invention are given for the purpose of illustration and are not to be construed as unduly limiting the invention. In the drawings:

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

FIG. 2 is a schematic view of a core strand portion of the present invention;

FIG. 3 is a schematic view of a strand in an embodiment of the invention;

FIG. 4 is a schematic view of an embodiment of the present invention with a first and second wrapping layer;

FIG. 5 is a schematic view of an embodiment of the present invention with a coating layer;

figure 6 is a schematic view of the cable core base of figure 5;

fig. 7 is a schematic diagram of a multi-layer passivation structure used in the invention.

Description of reference numerals:

1-ply yarn; 2-conductor monofilament; 3-a core strand portion; 4-an outer ply portion; 5-central strand; 6-peripheral ply yarn; 7-a first wrapping layer; 8-a second band layer; 9-a coating layer; 10-cable core foundation; 11-strands exposed outside the coating; 12-a buffer gap; 13-a shielding layer; 14-a fire barrier layer; 15-outer sheath.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality" means two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixedly, detachably or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail below with reference to the drawings and embodiments.

A crack and loose preventing flexible cable, as shown in fig. 1 to 3, includes a stranded conductor formed by twisting a plurality of strands 1 in a regular twisting manner, a twisting pitch being 10 times a diameter of the stranded conductor; the folded yarn is formed by twisting a plurality of conductor monofilaments 2, and the twisting pitch is 8-10 times of the diameter of the folded yarn; in order to improve the compression resistance, the tensile resistance and the torsion resistance of the cable, hemp or glass fiber can be filled between every two strands. By way of example, the strand is formed by twisting conductor monofilaments in a 1+6 regular arrangement, and the structural design ensures that the strand is formed roundly, the structural arrangement of the strand is not easy to shift, the stability is good, and the strand has good resilience under the twisting pitch.

During manufacturing, the conductor monofilament can adopt an annealing round copper rod with the diameter of 8.0mm and a red copper series with the purity of not less than 99.999 percent, and is drawn to 1.0mm through a large copper drawing machine, drawn to 0.15mm through a small copper drawing machine, and annealed by a tubular annealing machine for 0.15mm monofilament.

And then bundling the 0.15mm annealed copper monofilaments by a 1+6 regular arrangement, wherein the bundling pitch is controlled within 10 times, and the smaller the pitch, the better the resilience of the strands is, but not less than 8 times. And then the bunched yarns are stranded and are stranded into six types of stranded yarns in a regular arrangement form of conductors in a regular twisting mode, the twisting pitch is set to be 10 times, and the conductors are twisted by the regularly arranged stranded yarns, so that the defects of yarn throwing, strand jumping, looseness, poor rebound resilience and the like caused by twisting of the stranded yarns of the bunched yarns can be avoided.

Then, the twisted strands are twisted into a regularly arranged twisted conductor in a regular twisting mode, the twisting pitch is set to be 8 times, the resistance meets the requirement of GB/3956-.

The outer side of the stranded conductor of the cable is coated with a protective layer structure. Typically, 0.15mm annealed copper wire is used for the conductor filaments. The protective layer structure comprises a transparent insulating layer. By way of example, the insulating layer is made of a flexible polyvinyl chloride transparent insulating material at 105 ℃.

The cable provided by the invention is easy to form and bend, high in resilience, high in normal working temperature resistance, good in overall stability, stable in service performance and high in reliability. In the scheme that only cladding has the insulating layer in the stranded conductor outside, the thermal diffusivity is very good, and simultaneously, transparent insulating layer helps the wiring operation and overhauls the maintenance in-process, can look over the stranded conductor state directly perceivedly, stops to have the condition existence that influences performance such as throwing, jumping the thigh, loose.

In an alternative embodiment the stranded conductor comprises a core strand portion 3 comprising a central strand 5 and a number of peripheral strands 6 around the central strand, the peripheral strands being arranged evenly around the centre of the central strand, and an outer strand portion 4, the strands in the outer strand portion being likewise arranged evenly around the centre of the core strand portion, i.e. the centre of the central strand. By way of example, the inner core strand portion includes 7 strands arranged in a 1+6 regular arrangement. The outer strand part comprises 12 strands uniformly distributed in the center of the central strand.

In a further improved scheme, as shown in fig. 4, the outer side of the core strand part is coated with a first wrapping layer 7, and the outer side of the outer layer strand part is coated with a second wrapping layer 8, so that the core part of the cable is ensured to have excellent stability, and the compression resistance and the torsion resistance are stronger.

As another modification, as shown in fig. 5 and 6, under the premise of making the cable have high elasticity, in order to improve the torsion resistance, the strands in the outer layer strand part can be selected at intervals, and the inner core strand part is coated with the coating layer 9 to form a cable core base 10.

For example, the coating layer may be formed by wrapping a polyester tape, a PP tape, or a PE tape, or may be formed by extrusion molding using a sheathing compound. The folded yarn 11 exposed outside the wrapping band layer is just embedded into a space formed by folded yarns at two adjacent sides, the folded yarn exposed outside the wrapping band layer is tightly covered by the protective layer structure, and a buffer gap 12 is reserved between the inner side and the inner core folded yarn and can be supported by the wrapping band layer, so that the stability is ensured.

When the cable is pressed or twisted, the cable is allowed to have smaller deformation amount in the radial direction of the cable, and the working condition under load is self-adapted. And when being loaded, under the restriction of sheath structure and band layer, can not break away from original position, under the prerequisite of guaranteeing the overall stability of cable, effectively promoted the anti extrusion of cable and anti torsion ability, strong adaptability, simultaneously, also further promoted the elasticity of cable, the resilience is better.

It should be noted that, in order to balance the adaptive deformation and improve the torsion resistance and the resilience performance of the cable, the cross-sectional area of the buffer gap between the strand exposed out of the belting layer and the strand part of the inner core in the peripheral strand part is 1/5-1/3 of the cross-sectional area of a single strand, so that better performance balance can be achieved while ensuring torsion resistance, compression resistance, resilience and overall stability.

According to the requirement of the working condition, in an alternative embodiment, as shown in fig. 7, the sheath structure adopts a multi-layer structural design form, specifically, the sheath structure further includes a shielding layer 13, a fire-proof layer 14 and an outer sheath 15, which are sequentially coated from inside to outside on the outer side of the insulating layer, and a pungent agent is added into the sheath material of the outer sheath. By way of example, the shielding layer may be a copper wire braided shielding layer, the fire-proof layer may be a ceramic silicon rubber layer, and the outer sheath may be a low-halogen flame-retardant polyolefin sheath. Such structural design can further promote the shielding performance and the fire behavior of cable, and simultaneously, impact resistance is better, still has the protection against rodents to sting the ability concurrently.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The utility model provides a prevent ftractureing and prevent loose flexible cable which characterized in that: the stranded conductor comprises a stranded conductor formed by stranding a plurality of strands in a stranding mode, wherein the stranding pitch is 10 times of the diameter of the stranded conductor; the folded yarn is formed by twisting a plurality of conductor monofilaments, and the twisting pitch is 8-10 times of the diameter of the folded yarn; the stranded conductor comprises an inner core strand portion and an outer layer strand portion; a protective layer structure is coated outside the stranded conductor; the inner core strand part comprises a central strand and a plurality of peripheral strands on the periphery of the central strand, and the peripheral strands are uniformly distributed in the center of the central strand.

2. The flexible cable of claim 1, wherein the flexible cable is one of: the protective layer structure includes an insulating layer.

3. The flexible cable as claimed in claim 1, wherein: hemp or glass fiber is filled between every two strands.

4. The flexible cable as claimed in claim 1, wherein: the conductor monofilament is made of 0.15mm annealed copper wires.

5. A flexible cable for preventing cracking and loosening according to claim 1 or 4, wherein: the folded yarn is formed by bunching 1+6 regularly arranged conductor monofilaments.

6. The flexible cable as claimed in claim 1, wherein: the strands in the outer layer strand part are uniformly distributed in the center of the inner core strand part.

7. The flexible cable as claimed in claim 1, wherein: the outer side of the inner core strand part is coated with a first wrapping layer, and the outer side of the outer layer strand part is coated with a second wrapping layer.

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