CN216084408U - Irradiation cross-linked flame-retardant polyolefin cable - Google Patents

Abstract

The utility model discloses an irradiation crosslinking flame-retardant polyolefin cable, which comprises: the cable comprises a main cable core, a first insulating layer and a second insulating layer, wherein the main cable core consists of a first conductor and the first insulating layer, and the first insulating layer wraps the outside of the cable core layer; an inner protective layer configured as a polygonal ring structure and wrapped outside the first insulating layer; the auxiliary wire cores are arranged on the peripheral surface of the inner protective layer at intervals and abut against the inner protective layer; and the outer protective layer is wrapped on the outer wall surfaces of the auxiliary wire cores and used for limiting and fixing the auxiliary wire cores. According to the utility model, the main wire core and the plurality of auxiliary wire cores are isolated and fixed through the inner protective layer and the outer protective layer, so that the plurality of auxiliary wire cores can be supported and protected, external heat can be prevented from invading the main wire core, the service life of the irradiation crosslinking flame-retardant polyolefin cable is prolonged, and the flame-retardant effect is improved.

Description

Irradiation cross-linked flame-retardant polyolefin cable

Technical Field

The utility model relates to the technical field of cables, in particular to an irradiation crosslinking flame-retardant polyolefin cable.

Background

Cables for transmission of electrical (magnetic) energy, information and electromagnetic energy conversion are typically rope-like cables stranded with several or several groups of at least two conductors, each group being insulated from each other and usually twisted around a center, the entire outer surface being coated with a highly insulating coating.

The cable in the prior art is not enough in self flame retardant effect, makes cable spontaneous combustion damage very easily, has reduced the security of cable use to current cable interference killing feature and tensile strength are not enough, and then have reduced the life of cable.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides an irradiation crosslinking flame-retardant polyolefin cable, which aims to solve the problems that the cable in the prior art is easy to damage due to spontaneous combustion because of insufficient flame-retardant effect, the use safety of the cable is reduced, the anti-interference capability and the tensile property of the existing cable are insufficient, and the like.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the utility model is to propose: the radiation crosslinking flame-retardant polyolefin cable is characterized by comprising a main wire core, a first insulating layer and a second insulating layer, wherein the main wire core consists of a first conductor and the first insulating layer, and the first insulating layer is wrapped outside the main wire core; an inner protective layer configured as a polygonal ring structure and wrapped outside the first insulating layer; the auxiliary wire cores are arranged on the peripheral surface of the inner protective layer at intervals and abut against the inner protective layer; and the outer protective layer is wrapped on the outer wall surfaces of the auxiliary wire cores and used for limiting and fixing the auxiliary wire cores.

Preferably, the secondary core comprises: a second conductor; a second insulating layer wrapped around the inner conductor; the electric shielding layer is wrapped outside the second insulating layer; and the heat insulation layer is wrapped outside the electric shielding layer and abuts against the inner protective layer.

Preferably, the outer protective layer comprises: the third insulating layer wraps the auxiliary wire cores; the armor layer is wrapped outside the third insulating layer; the wear-resistant layer is wrapped outside the armor layer.

Preferably, a gel layer is filled between the third insulating layer and the plurality of auxiliary cores and is used for fixing the plurality of auxiliary cores at intervals.

Preferably, the wear-resistant layer is made of multiple layers of wear-resistant paper, and the armor layer is double-layer galvanized steel strip armor.

Preferably, an electric shielding net is arranged outside the inner protective layer, and a filler is arranged between the inner protective layer and the main wire core.

Preferably, the electric shielding net is made of tinned copper wires, and the filler is made of expanded graphite.

Preferably, the temperature resistance range of the outer protective layer is 140-150 ℃.

The utility model provides an irradiation crosslinking flame-retardant polyolefin cable which has the following beneficial effects:

this cable is by the main line core, the inlayer inoxidizing coating, a plurality of auxiliary line cores, and outer inoxidizing coating is constituteed, through designing interior inoxidizing coating for polygon annular structure and wrap up outside the main line core, can effectively block main line core and heat source, blocks the circulation of air, and isolated smog and flame spread improve the heat-resisting time limit of main line core, also can absorb external impact force and play the support guard action to a plurality of auxiliary line cores. Through wrapping up outer inoxidizing coating in a plurality of auxiliary core outer wall surfaces, it is fixed to a plurality of auxiliary core restrictions, and then improve the safe in utilization and the life-span of cable.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of a radiation crosslinked flame retardant cable of the present invention;

FIG. 2 is a schematic cross-sectional view of a radiation crosslinked flame retardant cable of the present invention;

FIG. 3 is a schematic cross-sectional view of an inner protective layer according to the present invention;

FIG. 4 is a schematic cross-sectional view of a secondary core of the present invention;

FIG. 5 is a cross-sectional view of an outer protective layer of the present invention;

the reference numbers illustrate:

1. a main wire core; 11. a first conductor; 12. a first insulating layer; 2. an inner protective layer; 21. an electrical shielding mesh; 22. a filler; 3. a plurality of secondary cores; 31. a second conductor; 32. a second insulator; 33. an electrical shielding layer; 34. a thermal insulation layer; 4. an outer protective layer; 41. a third insulating layer; 42. an armor layer; 43. a wear layer; 44. a gel layer;

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Furthermore, the terms "first", "second" and "first" 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" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The radiation cross-linked flame retardant polyolefin cable in the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the present invention provides the technical solutions: an irradiation crosslinked flame retardant polyolefin cable comprising: the cable comprises a main cable core 1, wherein the main cable core 1 consists of a first conductor 11 and a first insulating layer 12, and the first insulating layer 12 wraps the main cable core 1; an inner protective layer 2, wherein the inner protective layer 2 is constructed into a polygonal annular structure and wraps the first insulating layer 12; the auxiliary wire cores 3 are respectively arranged on the peripheral surface of the inner protective layer 2 at intervals and abut against the inner protective layer 2; outer inoxidizing coating 4, outer inoxidizing coating 4 parcel is on the surface of the 3 outer walls of a plurality of auxiliary core for it is fixed with the restriction of a plurality of auxiliary core 3.

Specifically, in the embodiment of the utility model, the inner protective layer 2 is arranged in the irradiation crosslinking flame-retardant polyolefin cable, the inner protective layer 2 is wrapped outside the main wire core 1, the inner protective layer 2 is arranged in a polygonal annular structure, the supporting and protecting effects can be achieved on the plurality of auxiliary wire cores 3, the external impact force can be comprehensively absorbed, the electric isolation and protection effects can be achieved between the main wire core 1 and the plurality of auxiliary wire cores 3, and the outer protective layer 4 is arranged and wrapped on the outer wall surfaces of the plurality of auxiliary wire cores 3 and used for limiting and fixing the plurality of auxiliary wire cores 3, so that the use safety and the service life of the irradiation crosslinking flame-retardant polyolefin cable are improved.

Referring to fig. 4, the plurality of secondary cores 3 includes: a second conductor 31; a second insulating layer 32, the second insulating layer 32 wrapping on the second conductor 31; the electric shielding layer 33, the electric shielding layer 33 wraps the second insulating layer 32; and the heat insulation layer 34 is wrapped outside the electric shielding layer 33 and abuts against the inner protective layer 2.

Specifically, in the present embodiment, the second insulating layer 32 of the plurality of auxiliary core 3 is sleeved on the outer surface of the second conductor 31, the second insulating layer 32 is made of polyolefin material using irradiation crosslinking technology, and the charring property of polyolefin can be improved by irradiation crosslinking reaction, so as to improve the flame retardancy of the plurality of auxiliary core 3; the skilled person can select the corresponding insulating layer material according to the use scenario or actual requirements of the cable. The electric shielding layers 33 on the plurality of auxiliary wire cores 3 are arranged outside the second insulating layer 32, interact with the electric shielding net 21 on the inner protective layer 2 and are grounded to isolate the induced interference voltage of external connection to the wire, so that the shielding effect is enhanced, and a certain grounding protection effect can be achieved; the heat insulating layer 34 is arranged outside the electric shielding layer 33, so that the external heat can be isolated, the external heat is prevented from intruding into the second conductor 31 in a large amount, and the high-temperature resistance and the flame retardance of the irradiation crosslinking flame-retardant polyolefin cable are improved.

Referring to fig. 5, the outer protective layer 4 includes: a third insulating layer 41, the third insulating layer 41 wrapping the plurality of auxiliary cores 3; the armor layer 42 is wrapped outside the third insulating layer 41; wear-resistant layer 43, wear-resistant layer 43 wraps up outside armor 42.

Specifically, in this embodiment, the third insulating layer 41 in the outer protective layer 4 wraps the outer wall surfaces of the plurality of auxiliary cores 3, a gel layer 44 is filled between the third insulating layer 41 and the plurality of auxiliary cores 3, and the gel layer 44 is an inorganic polymerized silicon adhesive layer, and is used for limiting and fixing the plurality of auxiliary cores 3 and playing a role in insulation and flame retardation. The armor layer 42 is arranged outside the third insulating layer 41, the armor layer 42 adopts a double-layer galvanized steel strip and gap wrapping process for enabling the cable to bear radial pressure, the structural integrity and the electrical performance of the cable are protected, the service life of the cable is prolonged, the temperature resistance range of the outer protective layer 4 is 140-150 ℃, and the cable can normally work in a severe environment.

Referring to fig. 3, an electric shielding net 21 is provided outside the inner protective layer 2, and a filler 22 is provided between the inner protective layer 2 and the main core 1.

In the embodiment, an electric shielding net 21 is arranged outside the inner protection layer 2, the electric shielding net 21 wraps the inner protection layer 2, the electric shielding net 21 is made of tinned copper wire, so that an electromagnetic field can be shielded in the cable, the distribution of the electric field is equalized, and the electromagnetic field is prevented from being disordered and interfered to influence electromagnetic transmission; the filler 22 is made of an expanded graphite material, and the expanded graphite filler 22 is arranged between the inner protective layer 2 and the main wire core 1, so that a burning body (the main wire core 1) and a heat source can be effectively blocked, air circulation is blocked, smoke and flame spread are isolated, and the heat-resisting time limit of the main wire core 1 is improved.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Claims (8)

1. An irradiation crosslinked flame retardant polyolefin cable comprising:

the cable comprises a main cable core, a first insulating layer and a second insulating layer, wherein the main cable core consists of a first conductor and the first insulating layer, and the first insulating layer wraps the main cable core;

an inner protective layer configured as a polygonal ring structure and wrapped outside the first insulating layer;

the auxiliary wire cores are arranged on the peripheral surface of the inner protective layer at intervals and abut against the inner protective layer;

and the outer protective layer is wrapped on the outer wall surfaces of the auxiliary wire cores and used for limiting and fixing the auxiliary wire cores.

2. The radiation crosslinked flame retardant polyolefin cable of claim 1 wherein the secondary core comprises:

a second conductor;

a second insulating layer wrapped over the second conductor;

the electric shielding layer is wrapped outside the second insulating layer;

and the heat insulation layer is wrapped outside the electric shielding layer and abuts against the inner protective layer.

3. The radiation crosslinked flame retardant polyolefin cable according to claim 1, wherein the outer protective layer comprises:

the third insulating layer wraps the auxiliary wire cores;

the armor layer is wrapped outside the third insulating layer;

the wear-resistant layer is wrapped outside the armor layer.

4. The radiation crosslinked flame-retardant polyolefin cable according to claim 3, wherein a gel layer is filled between the third insulating layer and the plurality of the auxiliary cores for fixing the plurality of the auxiliary cores at intervals.

5. The radiation crosslinked flame-retardant polyolefin cable according to claim 3, wherein the wear-resistant layer is made of multiple layers of wear-resistant paper, and the armor layer is a double-layer galvanized steel armor.

6. The radiation crosslinked flame-retardant polyolefin cable according to claim 1, wherein an electrical shielding net is arranged outside the inner protective layer, and a filler is arranged between the inner protective layer and the main wire core.

7. The radiation crosslinked flame retardant polyolefin cable of claim 6 wherein the electrical shielding mesh is made of tinned copper wire and the filler is expanded graphite.

8. The radiation crosslinked flame retardant polyolefin cable according to claim 1, wherein the outer protective layer has a temperature resistance in the range of 140 ℃ to 150 ℃.

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