CN215340463U

CN215340463U - Bending insensitive indoor optical cable capable of preventing electromagnetic interference

Info

Publication number: CN215340463U
Application number: CN202121354752.XU
Authority: CN
Inventors: 徐建军; 韩学飞
Original assignee: Zhejiang Hanxin Photoelectric Co ltd
Current assignee: Zhejiang Hanxin Photoelectric Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-28
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses an electromagnetic interference resistant bending insensitive indoor optical cable, which comprises: the inner sheath is made of flame-retardant PVC materials, and two transmission lines and two second reinforcing pieces are arranged in the inner sheath side by side; the two second reinforcing pieces are respectively arranged at the outer sides of the two transmission lines; the transmission line comprises an optical fiber, a tight wrapping sleeve is arranged on the outer wall of the optical fiber, and a first reinforcing piece is further arranged on the outer side of the tight wrapping sleeve; the flame-retardant filling layer is positioned on the outer wall of the inner sheath and is made of inorganic mineral paper rope; the wrapping layer is wrapped on the outer wall of the flame-retardant filling layer in a rolling mode, and the wrapping layer is a single-side self-adhesive flame-retardant wrapping tape; the compression-resistant layer is extruded on the outer wall of the wrapping layer and made of TPU, a plurality of groups of buffer holes are formed in the inner wall of the compression-resistant layer, and the plurality of groups of buffer holes are uniformly distributed in the inner wall of the compression-resistant layer; the anti-electromagnetic field interference layer is longitudinally wrapped on the outer wall of the anti-pressure layer, and an outer sheath is extruded on the outer wall of the anti-electromagnetic field interference layer. The utility model has perfect fireproof function, can deal with long-time fire conditions and reduces loss.

Description

Bending insensitive indoor optical cable capable of preventing electromagnetic interference

Technical Field

The utility model relates to the technical field of indoor optical cables, in particular to an electromagnetic interference resistant bending insensitive indoor optical cable.

Background

With the continuous development of indoor network construction, the optical fiber with high transmission rate and long distance is used as a data transmission medium in a comprehensive wiring system, the utilization rate is continuously improved, but various indoor electric appliances generate electromagnetic field radiation when used, and the transmission performance is influenced.

The indoor optical cable is suitable for optical cable wiring and wiring in offices in telecommunication engineering and optical cable comprehensive wiring of various urban buildings, the problem that electromagnetic field radiation influences transmission performance needs to be considered, the design requirement of the indoor optical cable needs to fully consider the mechanical performance requirements of the engineering on torsion resistance, extrusion resistance, impact resistance and stretching resistance of the optical cable under the indoor operation environment condition under the principle that transmission technical indexes are guaranteed, the interference influence of the electromagnetic field radiation on signal transmission in the optical fiber in a space application environment and the direct invasion influence of hydroxyl bonds in water vapor in air on the optical fiber are considered, and the characteristics are not fully considered in the common indoor optical cable in the market at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art, and provides an anti-electromagnetic interference bending insensitive indoor optical cable.

In order to achieve the purpose, the utility model adopts the following technical scheme: electromagnetic interference resistant bend insensitive indoor optical cable, includes: the inner sheath is made of flame-retardant PVC materials, and two transmission lines and two second reinforcing pieces are arranged in the inner sheath side by side; the two second reinforcing pieces are respectively arranged at the outer sides of the two transmission lines; the transmission line comprises an optical fiber, a tight wrapping sleeve is arranged on the outer wall of the optical fiber, and a first reinforcing piece is further arranged on the outer side of the tight wrapping sleeve; the flame-retardant filling layer is positioned on the outer wall of the inner sheath and is made of inorganic mineral paper rope; the wrapping layer is wrapped on the outer wall of the flame-retardant filling layer in a rolling mode, and the wrapping layer is a single-side self-adhesive flame-retardant wrapping tape; the compression-resistant layer is extruded on the outer wall of the wrapping layer and made of TPU, a plurality of groups of buffer holes are formed in the inner wall of the compression-resistant layer, and the plurality of groups of buffer holes are uniformly distributed in the inner wall of the compression-resistant layer; the anti-electromagnetic field interference layer is longitudinally wrapped on the outer wall of the anti-pressure layer, and an outer sheath is extruded on the outer wall of the anti-electromagnetic field interference layer.

Preferably, the inner jacket is a strip with a rectangular end surface, and is obtained by processing through an extrusion die with a rectangular opening, and the arrangement direction of the strip is parallel to the axial direction of the optical fiber.

Preferably, the inner sheath is provided with tearing grooves for facilitating peeling on the left and right sides.

Preferably, the first reinforcement member is an aramid mesh fabric formed by warp knitting aramid filaments, and the second reinforcement member is an aramid cord formed by knitting a plurality of strands of aramid filaments.

Preferably, the optical fiber model is G657. A2.

Preferably, the electromagnetic field interference preventing layer is a single-side self-adhesive aluminum plastic foil.

Preferably, the outer sheath is a flame retardant polyolefin.

The utility model has the following beneficial effects:

compared with the prior art, this crooked insensitive indoor optical cable of electromagnetic interference resistance, setting through plastic-aluminum foil, it is good to make the anti external disturbance ability of optical cable, optical fiber transmission speed is not influenced, the first reinforcement and the second reinforcement of setting, can promote the pull resistance of cable greatly, the rectangular inner sheath of setting and the compressive layer that is provided with the multiunit buffering hole, promote the cable resistance to compression by a wide margin, the distortion resistance ability, and through inner sheath cooperation optic fibre, make the anti bending resistance of optic fibre promote, do not influence transmission speed, this cable passes through fire-retardant filling layer, the inner sheath that fire-retardant PVC made, the oversheath that fire-retardant polyolefin made, the fire prevention function is perfect, can deal with long-time condition of a fire, also can function under great conflagration condition, the loss is reduced, this cable tensile, the resistance to compression, distortion resistance, it is fire-retardant, be applicable to stride across greatly and long distance use.

Drawings

Fig. 1 is an end view of the overall structure of an anti-emi bending insensitive indoor optical cable according to the present invention;

fig. 2 is a schematic view of a partial structure of an inner sheath of an anti-electromagnetic interference bending insensitive indoor optical cable provided by the utility model;

fig. 3 is a schematic diagram of a transmission line end face structure of an anti-electromagnetic interference bending insensitive indoor optical cable provided by the utility model.

Illustration of the drawings:

1. an optical fiber; 2. tightly wrapping the sleeve; 3. a first reinforcement; 4. a second reinforcement; 5. an inner sheath; 6. a tearing groove; 7.a flame retardant filler layer; 8. a wrapping layer; 9. a pressure resistant layer; 10. a buffer hole; 11. an electromagnetic field interference prevention layer; 12. an outer sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the bending insensitive indoor optical cable for preventing electromagnetic interference provided by the present invention: the inner sheath 5 is made of flame-retardant PVC materials, and two transmission lines and two second reinforcing pieces 4 are arranged in the inner sheath 5 side by side; the two second reinforcing pieces 4 are respectively arranged at the outer sides of the two transmission lines; the transmission line comprises an optical fiber 1, a tight wrapping sleeve 2 is arranged on the outer wall of the optical fiber 1, and a first reinforcing piece 3 is further arranged on the outer side of the tight wrapping sleeve 2; the flame-retardant filling layer 7 is located on the outer wall of the inner sheath 5 and is made of inorganic mineral paper rope; the wrapping layer 8 is wrapped on the outer wall of the flame-retardant filling layer 7 in a rolling mode, and the wrapping layer 8 is a single-side self-adhesion flame-retardant wrapping tape; the compression-resistant layer 9 is extruded on the outer wall of the wrapping layer 8 and made of TPU, a plurality of groups of buffer holes 10 are formed in the inner wall of the compression-resistant layer 9, and the plurality of groups of buffer holes 10 are uniformly distributed in the inner wall of the compression-resistant layer 9; the anti-electromagnetic field interference layer 11 is longitudinally wrapped on the outer wall of the anti-pressure layer 9, and the outer wall of the anti-electromagnetic field interference layer 11 is extruded with an outer sheath 12.

Inner sheath 5 is fire-retardant PVC, and inner sheath 5 adopts the extrusion tooling processing of rectangular mouth to obtain, and inner sheath 5 is rectangular for the terminal surface, and rectangular setting direction and optic fibre 1's axial direction are parallel, and the 5 left and right sides of inner sheath all are provided with and are used for peeling off

convenient tear groove

6, and 5 flame retardant efficiency of inner sheath through fire-retardant PVC production are good.

First reinforcement 3 uses aramid fiber mesh cloth that aramid fiber long filament warp knitting formed, and two second reinforcements 4 are the aramid fiber rope that multi-strand aramid fiber silk was woven and is formed, promote the tensile strength of cable body through first reinforcement 3, second reinforcement 4. The model of the optical fiber 1 is G657.A2, and the single-mode optical fiber 1 of G657.A2 can be suitable for the installation environment with smaller bending radius. The electromagnetic field interference preventing layer 11 is a single-side self-adhesive aluminum-plastic foil, which has low cost and good electromagnetic field interference preventing effect.

The outer sheath 12 is made of flame-retardant polyolefin, so that the flame retardance of the flame-retardant polyolefin is good, and the requirement of indoor cable installation is met.

The working principle is as follows: this crooked insensitive indoor light of electromagnetic interference resistance, adopt G657.A2 single mode fiber 1 as the transmission line, it is applicable in less bend radius installation environment, through first reinforcement 3, the tensile strength of 4 promotion cable bodies of second reinforcement, the rectangular inner sheath 5 that sets up and the resistance to compression layer 9 that is provided with multiunit buffering hole 10, promote cable compressive capacity by a wide margin, the 5 left and right sides of inner sheath all are provided with and are used for peeling off convenient tear groove 6, it is convenient to peel off, 5 flame retardant efficiency of inner sheath through fire-retardant PVC production are good, electromagnetic field interference resistant layer 11 is single face self-adhesion plastic-aluminum foil, single face self-adhesion plastic-aluminum foil is with low costs, electromagnetic field interference resistant is effectual.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. Crooked insensitive indoor optical cable of electromagnetic interference resistance, its characterized in that includes:

the cable comprises an inner sheath (5) made of flame-retardant PVC materials, wherein two transmission lines and two second reinforcing pieces (4) are arranged in the inner sheath (5) side by side; the two second reinforcing pieces (4) are respectively arranged at the outer sides of the two transmission lines; the transmission line comprises an optical fiber (1), a tight wrapping sleeve (2) is arranged on the outer wall of the optical fiber (1), and a first reinforcing piece (3) is further arranged on the outer side of the tight wrapping sleeve (2);

a flame-retardant filling layer (7) made of inorganic mineral paper rope and positioned on the outer wall of the inner sheath (5);

a wrapping layer (8) wrapped on the outer wall of the flame-retardant filling layer (7), wherein the wrapping layer (8) is a single-side self-adhesive flame-retardant wrapping tape;

the compression-resistant layer (9) is extruded on the outer wall of the wrapping layer (8) and made of TPU, a plurality of groups of buffer holes (10) are formed in the inner wall of the compression-resistant layer (9), and the plurality of groups of buffer holes (10) are uniformly distributed in the inner wall of the compression-resistant layer (9);

the anti-electromagnetic field interference layer (11) is longitudinally wrapped on the outer wall of the pressure resistant layer (9), and an outer sheath (12) is extruded on the outer wall of the anti-electromagnetic field interference layer (11).

2. The bending insensitive room optical cable for preventing electromagnetic interference according to claim 1, wherein: the inner sheath (5) is rectangular strip for the terminal surface, adopts the extrusion tooling processing of rectangular mouthful to obtain, rectangular direction of setting up is parallel with the axial of optic fibre (1).

3. The bending insensitive room optical cable for preventing electromagnetic interference according to claim 2, wherein: the left side and the right side of the inner sheath (5) are provided with tearing grooves (6) for convenient stripping.

4. The bending insensitive room optical cable for preventing electromagnetic interference according to claim 1, wherein: the first reinforcing piece (3) is aramid mesh cloth formed by warp knitting aramid filaments, and the second reinforcing piece (4) is an aramid rope formed by weaving a plurality of strands of aramid fiber yarns.

5. The bending insensitive room optical cable for preventing electromagnetic interference according to claim 1, wherein: the type of the optical fiber (1) is G657. A2.

6. The bending insensitive room optical cable for preventing electromagnetic interference according to claim 1, wherein: the electromagnetic field interference preventing layer (11) is a single-side self-adhesive aluminum-plastic foil.

7. The bending insensitive room optical cable for preventing electromagnetic interference according to claim 1, wherein: the outer jacket (12) is a flame retardant polyolefin.