CN211654396U

CN211654396U - Environment-friendly high-flame-retardant ethylene propylene rubber insulated medium-voltage cable

Info

Publication number: CN211654396U
Application number: CN202020049836.1U
Authority: CN
Inventors: 吴维; 田中; 苗福庆; 冯国五; 何正寅
Original assignee: Yangzhou Shuguang Cable Co Ltd
Current assignee: Yangzhou Shuguang Cable Co Ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-10-09
Anticipated expiration: 2030-01-10

Abstract

The utility model discloses an environment-friendly high flame-retardant ethylene propylene rubber insulated medium-voltage cable in the technical field of cables, which comprises a conductor, three groups of conductors, an insulating layer is extruded on the outer wall of the conductor, a metal shielding layer is extruded on the outer wall of the insulating layer, three groups of filling layers are uniformly arranged on the outer wall of the metal shielding layer, an inner sheath is extruded on the outer wall of the filling layer, a wrapping layer is extruded on the outer wall of the inner sheath, an armor layer is extruded on the outer wall of the wrapping layer, an outer sheath is extruded on the outer wall of the armor layer and is connected with the insulating layer and the metal shielding layer in a three-layer co-extrusion connection mode, limiting grooves are respectively arranged on the insulating layer and the metal shielding layer, filling gaps are arranged between the insulating layer and the conductor, fillers are filled in the limiting grooves and the filling gaps, the stability of the conductor in the cable is ensured, and, the cable is protected by the inner and outer double-layer sheaths, has a good flame-retardant effect and is used in a high-temperature environment.

Description

Environment-friendly high-flame-retardant ethylene propylene rubber insulated medium-voltage cable

Technical Field

The utility model relates to the technical field of cables, specifically be environment-friendly high flame retardant ethylene propylene rubber insulation medium voltage cable.

Background

Cable among the prior art is in the in-process of production and processing, and the conductor in the cable is generally stable when making the cable mounting through simple filler packing, but simple single packing is fixed like this, and stability is not high for the cable is pulling when twisting and drawing, and loose phenomenon appears easily in inside, and cable itself does not possess good flame retardant efficiency simultaneously, is difficult to use under high temperature environment. Therefore, an environment-friendly high-flame-retardant ethylene propylene rubber insulated medium-voltage cable is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an insulating middling pressure cable of environment-friendly high fire-retardant EP rubbers to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the environment-friendly high-flame-retardant ethylene propylene rubber insulated medium-voltage cable comprises conductors, wherein the conductors comprise three groups, the outer wall of each conductor is extruded with an insulating layer, the outer wall of each insulating layer is extruded with a metal shielding layer, the outer wall of each metal shielding layer is uniformly provided with a filling layer, the outer wall of each filling layer is extruded with an inner sheath, the outer wall of each inner sheath is extruded with a winding layer, the outer wall of each winding layer is extruded with an armor layer, and the outer wall of each armor layer is extruded with an outer sheath.

Furthermore, the outer end of the metal shielding layer and the inner end of the insulating layer are both provided with limiting grooves, the joint of the insulating layer and the conductor is provided with a filling gap, and the limiting grooves are uniformly provided with filling layers.

Further, the outer sheath and the inner sheath are both high flame retardant polyolefin mixture sheaths.

Furthermore, the insulating layer is an ethylene propylene rubber insulating layer.

Further, the filling layer is made of braided hemp ropes, and rubber particles are filled in the inner walls of the braided hemp ropes.

Furthermore, the metal shielding layer is a double-layer copper strip extruded shielding layer.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the conductor of the utility model is connected with the insulating layer and the metal shielding layer through a three-layer co-extrusion connection mode, the insulating layer and the metal shielding layer are both provided with the limiting grooves, the filling gap is arranged between the insulating layer and the conductor, and the filler is filled in the limiting grooves and the filling gap, so that the stability of the conductor in the cable is further ensured, and the conductor is not easy to loose in the cable;

2. the utility model discloses set up inner sheath and oversheath, and inner sheath and oversheath all adopt high flame retardant polyolefin mixture, protect the cable through inside and outside double-deck sheath for the cable has good flame retardant efficiency, can use under high temperature environment.

Drawings

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

fig. 2 is a schematic view of the conductor connection structure of the present invention.

In the figure: 1. a conductor; 2. an insulating layer; 3. a metal shielding layer; 4. a filling layer; 5. an inner sheath; 6. wrapping a covering; 7. an armor layer; 8. an outer sheath; 9. filling the gap; 10. and a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a technical scheme: an environment-friendly high-flame-retardant ethylene propylene rubber insulated medium-voltage cable is shown in figure 1 and comprises a conductor 1, three groups of conductors 1, an outer wall of the conductor 1 is extruded with an insulating layer 2, an outer wall of the insulating layer 2 is extruded with a metal shielding layer 3, the outer walls of the three groups of metal shielding layers 3 are uniformly provided with a filling layer 4, an outer wall of the filling layer 4 is extruded with an inner sheath 5, an outer wall of the inner sheath 5 is extruded with a wrapping layer 6, an outer wall of the wrapping layer 6 is extruded with an armor layer 7, an outer wall of the armor layer 7 is extruded with an outer sheath 8, in the process of processing the cable, the conductor 1 is firstly prepared, the insulating layer 2 and the metal shielding layer 3 on the outer walls of the three groups of conductors 1 are fixedly connected in a three-layer co-extrusion mode, then the inner sheath 5 is extruded on the outer wall of the three layers of metal shielding layers 3, the filling layer 4 is filled in an interlayer between the inner sheath, The armor layer 7 and the outer sheath 8 are extruded outside the inner sheath 5;

referring to fig. 2, the outer end of the metal shielding layer 3 and the inner end of the insulating layer 2 are both provided with a limiting groove 10, the joint of the insulating layer 2 and the conductor 1 is provided with a filling gap 9, the filling layer 4 is uniformly arranged in the limiting groove 10, the limiting grooves 10 are both arranged on the metal shielding layer 3 and the insulating layer 2, and the joint of the insulating layer 2 and the conductor 1 is provided with the filling gap 9, so that when a cable is processed, a filler can be filled into the limiting groove 10 and the filling gap 9, and the overall strength of the cable is further enhanced, so that the cable is not easy to disperse;

the outer sheath 8 and the inner sheath 5 are both high-flame-retardant polyolefin mixture sheaths, the outer sheath 8 and the inner sheath 5 are both made of high-flame-retardant polyolefin mixture, and therefore the cable is protected through the double sheaths and has a good flame-retardant effect;

the insulating layer 2 is an ethylene propylene rubber insulating layer, and the insulating layer 2 can effectively ensure that the cable has a good insulating effect in the using process and internal transmission;

the filling layer 4 is a hemp rope braided fabric, rubber particles are filled in the inner wall of the hemp rope braided fabric, and the filling layer 4 ensures that the conductors 1 have better stability during installation;

the metal shielding layer 3 is a double-layer copper strip extruded shielding layer, so that the cable can well shield external electromagnetic interference during operation, and the operation is smoother.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Environment-friendly high flame retardant ethylene propylene rubber insulation medium voltage cable, including conductor (1), conductor (1) has three groups in total, its characterized in that: the outer wall of conductor (1) is crowded package insulating layer (2), the outer wall of insulating layer (2) is crowded package metallic shield (3), three groups the outer wall of metallic shield (3) evenly sets up filling layer (4), the outer wall crowded package inner sheath (5) of filling layer (4), the outer wall crowded package of inner sheath (5) has around covering (6), crowded package armor (7) around the outer wall of covering (6), the outer wall crowded package oversheath (8) of armor (7).

2. The environment-friendly high flame retardant ethylene propylene rubber insulated medium voltage cable according to claim 1, characterized in that: the outer end of the metal shielding layer (3) and the inner end of the insulating layer (2) are both provided with limiting grooves (10), the joint of the insulating layer (2) and the conductor (1) is provided with a filling gap (9), and the limiting grooves (10) are uniformly provided with filling layers (4).

3. The environment-friendly high flame retardant ethylene propylene rubber insulated medium voltage cable according to claim 1, characterized in that: the outer sheath (8) and the inner sheath (5) are both high flame retardant polyolefin mixture sheaths.

4. The environment-friendly high flame retardant ethylene propylene rubber insulated medium voltage cable according to claim 1, characterized in that: the insulating layer (2) is an ethylene propylene rubber insulating layer.

5. The environment-friendly high flame retardant ethylene propylene rubber insulated medium voltage cable according to claim 1, characterized in that: the filling layer (4) is made of hemp rope braided fabric, and rubber particles are filled in the inner wall of the hemp rope braided fabric.

6. The environment-friendly high flame retardant ethylene propylene rubber insulated medium voltage cable according to claim 1, characterized in that: the metal shielding layer (3) is a double-layer copper strip extruded shielding layer.