CN208488992U

CN208488992U - Miniature twisted cable in one kind is anti-

Info

Publication number: CN208488992U
Application number: CN201821469674.6U
Authority: CN
Inventors: 陈耕; 尹逊凯
Original assignee: NINGBO RONGHE WIRE Co Ltd
Current assignee: NINGBO RONGHE WIRE Co Ltd
Priority date: 2018-09-10
Filing date: 2018-09-10
Publication date: 2019-02-12
Anticipated expiration: 2028-09-10

Abstract

The utility model discloses the anti-interior miniature twisted cables of one kind, including cable body, the cable body include internal layer twisted wire and outermost layer twisted wire；If the internal layer twisted wire is by twisted one layer or one layer or more of the lay configuration formed of carried interest internal layer stranded conductor；The twisted outside that internal layer twisted wire is set of the outermost layer twisted wire, if being made of carried interest outer layer stranded conductor；Wherein, the internal layer stranded conductor and outer layer stranded conductor are formed by monofilament is twisted, and the twisted monofilament quantity of per share internal layer stranded conductor is 1.15 ~ 1.25 times of the twisted monofilament quantity of per share outer layer stranded conductor.The utility model is simple and reasonable for structure, outer diameter increases after enabling to practical twisted rear internal layer twisted wire twisted, and the twisted rear internal diameter of outermost layer twisted wire reduces, and realizes the tightly cladding of outermost layer twisted wire pair internal layer twisted wire, to increase interfacial friction, so that cable be avoided to inside contract.

Description

Miniature twisted cable in one kind is anti-

Technical field

The utility model relates to field of cable technology, in particular to a kind of anti-interior miniature twisted cable.

Background technique

Current big square of stranded conductor (such as 25mm²The above specification) it is generally small by 7 strands, 19 strands or 37 strands etc. in structure Unit twists conductor hierarchical composite and twists；The cable made of this big square of conductor, and bending radius short in sanction line length When lesser, cable ends can generate the phenomenon that inner conductor inside contracts because of bending.

Hierarchical composite is solved at present and twists the scheme inside contracted when conductor bends to be to reduce conductor strand pitch, is saved by reducing Away from the contact area of internal layer and outer layer in increase unit length, so that increasing friction force, inside contracts degree when reducing bending；It is existing Internal layer is led when in some is anti-made of reduction twisting pitch although miniature hierarchical composite strand conductor can reduce cable bend The degree to contract in vivo, but still can not thoroughly avoid inside contracting the lesser field of employment of phenomenon, especially bending radius, almost without work With；Meanwhile by reducing conductor strand pitch, the speed of production of conductor is reduced, and conductor Haul Rate increases, unit length Conductor weight increases, and increases manufacturing cost, and has improved space.

Utility model content

The utility model be in order to overcome above-mentioned defect in the prior art, provide one kind can be effectively improved cable inside contract it is existing As, and the anti-interior miniature twisted cable for small-bend radius installation site.

To achieve the above object, the utility model provides a kind of anti-interior miniature twisted cable, including cable body, the cable Ontology includes internal layer twisted wire and outermost layer twisted wire；

If the internal layer twisted wire is by twisted one layer or one layer or more of the twisted knot formed of carried interest internal layer stranded conductor Structure；

The twisted outside that internal layer twisted wire is set of the outermost layer twisted wire, if being made of carried interest outer layer stranded conductor；

Wherein, the internal layer stranded conductor and outer layer stranded conductor are formed by monofilament is twisted, and per share internal layer is twisted and leads The twisted monofilament quantity of body is 1.15 ~ 1.25 times of the twisted monofilament quantity of per share outer layer stranded conductor.

Be further arranged to: the direction of lay of the internal layer twisted wire is identical with the direction of lay of outermost layer twisted wire.

Be further arranged to: the twisted monofilament quantity of per share internal layer stranded conductor is the twisted list of per share outer layer stranded conductor 1.2 times of silk quantity.

Compared with prior art, the utility model is simple and reasonable for structure, by changing the internal structure of cable, not only can Enough effective improve inside contract phenomenon, are suitable for small-bend radius installation site, and do not influence speed of production, also do not increase conductor Substance does not increase cost.

Detailed description of the invention

Fig. 1 is the practical conductor structural schematic diagram of existing anti-interior miniature twisted cable；

Fig. 2 is the practical conductor structural schematic diagram of miniature twisted cable in the utility model is anti-；

Fig. 3 is the theoretical conductor structure schematic diagram of miniature twisted cable in the utility model is anti-.

The following drawings is marked to mark on it in conjunction with attached drawing:

1, cable body；2, internal layer twisted wire；2-2, internal layer twisted wire；21, internal layer stranded conductor；211, monofilament；3, most Outer layer twisted wire；3-3, outermost layer twisted wire；31, outer layer stranded conductor.

Specific embodiment

With reference to the accompanying drawing, a specific embodiment of the utility model is described in detail, it is to be understood that this The protection scope of utility model is not limited by the specific implementation.

It is existing to prevent interior miniature twisted cable as shown in Figure 1, including internal layer twisted wire 2-2 and outermost layer twisted wire 3-3 and interior Layer twisted wire 2-2 and outermost layer twisted wire 3-3 is twisted by strands conductor is compound, and the monofilament of per share stranded conductor Quantity is all the same,, can be real because being squeezed and deformed during compound twisted since sub-thread stranded conductor is different from solid conductor After border is twisted, inner conductor can be smaller than theoretical, thus causes and produces interlayer gap between internal layer and outermost layer, thus The frictional force of adjacent interlayer is reduced, to be easy to cause the problem of inside contracting.

Miniature twisted cable in the utility model one kind is anti-is as shown in Fig. 2, include cable body 1, which includes Internal layer twisted wire 2 and outermost layer twisted wire 3, the twisted outside that internal layer twisted wire 2 is set of the outermost layer twisted wire 3；The internal layer Twisted wire 2 is one layer or one layer or more of the lay configuration cooperatively formed by several internal layer stranded conductors 21, and the internal layer twists Conductor 21 is closed to be twisted by several monofilament；The outer layer twisted wire is cooperatively formed by several outer layer stranded conductors 31, and the outer layer Stranded conductor 31 is twisted by several monofilament.

As shown in figure 3, the monofilament quantity that per share internal layer stranded conductor 21 is twisted is what per share outer layer stranded conductor 31 was twisted 1.15 ~ 1.25 times of monofilament quantity, preferably 1.2 times, the specific manifestation in figure are as follows: the singular quantity of internal layer stranded conductor is 30 Root, the singular quantity of outer layer stranded conductor are 25；This cable is in the production process, it is preferable that the list of the utility model cable The total radical of monofilament of silk total radical and traditional cable keeps identical substantially, so that manufacturing cost, cable weight and production speed Degree remains unchanged；So twisted simultaneously, outer diameter increases after the practical twisted rear internal layer twisted wire 2 of the utility model cable can be made twisted Greatly, internal diameter reduces after outermost layer twisted wire 3 is twisted, realize outermost layer twisted wire 3 to the tightly cladding of internal layer twisted wire 2, thus Increase interfacial friction, so that cable be avoided to inside contract.

Conductor inside contracts comparison after table 1 takes 40cm to bend 100 times

Internal layer radical and outer layer radical ratio	Inside contract size mm
		1:1	7
1.15:1	2
		1.2:1	0.5
1.25:1	2
		1.3:1	Outer layer radical is very little, and there are gaps between adjacent conductor

From table 1: when the monofilament radical of internal layer stranded conductor and the identical monofilament radical of outer layer stranded conductor, internal layer Twisted wire inside contracts seriously；When the monofilament radical of internal layer stranded conductor is 1.15 ~ 1.25 times of the monofilament radical of outer layer stranded conductor When, the phenomenon that inside contracts of internal layer twisted wire substantially improves, and at especially 1.2 times, inside contracts phenomenon and disappears substantially；When internal layer radical is outer At layer 1.3 times of radical, outer layer radical is very little, exists between adjacent conductor compared with big gap, can not produce.

Further, the direction of lay of internal layer twisted wire 2 is identical with the direction of lay of outermost layer twisted wire 3, in this way, internal layer twists Zygonema 2 and 3 contact area of outermost layer twisted wire are big, and frictional force is big, so that cable be avoided to inside contract.

Disclosed above is only the embodiments of the present invention, and still, the utility model is not limited to this, any ability What the technical staff in domain can think variation should all fall into the protection scope of the utility model.

Claims

Miniature twisted cable in 1. one kind is anti-, which is characterized in that including cable body, the cable body include internal layer twisted wire and Outermost layer twisted wire；

If the internal layer twisted wire is by twisted one layer or one layer or more of the lay configuration formed of carried interest internal layer stranded conductor；

The twisted outside that internal layer twisted wire is set of the outermost layer twisted wire, if being made of carried interest outer layer stranded conductor；

Wherein, the internal layer stranded conductor and outer layer stranded conductor are formed by monofilament is twisted, and per share internal layer stranded conductor twists The monofilament quantity of conjunction is 1.15 ~ 1.25 times of the twisted monofilament quantity of per share outer layer stranded conductor.
2. a kind of anti-interior miniature twisted cable according to claim 1, which is characterized in that the internal layer is twisted cabling Direction is identical with the direction of lay of outermost layer twisted wire.
3. a kind of anti-interior miniature twisted cable according to claim 1, which is characterized in that per share internal layer stranded conductor is twisted Monofilament quantity be 1.2 times of the twisted monofilament quantity of per share outer layer stranded conductor.