CN212934216U

CN212934216U - Intrinsically safe computer cable with polyethylene insulation flame-retardant polyvinyl chloride sheath

Info

Publication number: CN212934216U
Application number: CN202022430063.4U
Authority: CN
Inventors: 孙勇; 郑少德; 巫后霞
Original assignee: Anhui Haiyuan Special Cable Co ltd
Current assignee: Anhui Haiyuan Special Cable Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-04-09
Anticipated expiration: 2030-10-27

Abstract

The utility model discloses an intrinsically safe type computer cable of polyethylene insulation flame-retardant polyvinyl chloride sheath belongs to cable technical field, including a plurality of pair twist units and parcel around the covering in a plurality of pair twist unit outsides, still include the oversheath, buffer layer and shielding layer, it has fire-retardant graphite powder filling layer to fill between the insulating layer outside around the covering inboard and pair twist unit, is equipped with a plurality of buffering strips around the inner wall of covering, and the inside of buffering strip is equipped with the bending strip, and the cross section of bending strip is the arc structure, has seted up a plurality of mounting groove on the bending strip, all installs buffer spring in every mounting groove. The utility model discloses a buffering strip and resistance to compression strip can cushion and protect the pair twist unit, avoid the pair twist unit to receive external force to press and take place great damage, and then improved the compressive property of this cable to can improve the flame retardant efficiency of cable through the flame retardant graphite powder filling layer.

Description

Intrinsically safe computer cable with polyethylene insulation flame-retardant polyvinyl chloride sheath

Technical Field

The utility model relates to the technical field of cables, specifically say an intrinsically safe computer cable of polyethylene insulation fire-retardant polyvinyl chloride sheath.

Background

The continuous development of high and new technologies such as big data, artificial intelligence, internet of things and the like, and the application range of computer cables is continuously expanded. Meanwhile, important engineering facilities such as large buildings, subways, tunnels, nuclear power stations and the like and places such as large supermarkets, exhibition centers and the like with intensive personnel are more and more, and requirements are provided for safety performance under the condition of fire. The computer cable plays an important role in the facilities, is a channel for processing various information, and plays an important role in escape and disaster relief if the computer cable can normally run within a certain time under the condition of fire. In the intellectualization and the integration process of an electric instrument, the compression resistance of the existing cable structure for the computer is weak, the cable inside the cable is easily extruded by external force and damaged, and needs to be improved, and the flame retardance of the existing cable is weak, so that the market demand cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intrinsically safe type computer cable of fire-retardant polyvinyl chloride sheath of polyethylene insulation to solve the technical problem that cable structure compressive property is weak and flame retardant efficiency is poor for the current computer among the prior art.

The technical scheme of the utility model is that: including a plurality of pair twist units and parcel at the wrapping layer in a plurality of pair twist unit outsides, every pair twist unit is formed by two conductor pair twists, every the outside of conductor all wraps up there is the insulating layer, wherein: the buffer layer is sleeved on the wrapping layer, the shielding layer is wrapped on the buffering layer, the outer side of each pair twisting unit is wrapped with the sub-shielding layer, the outer side of the shielding layer is wrapped by the outer sheath, a flame-retardant graphite powder filling layer is filled between the inner side of the wrapping layer and the outer side of the insulating layer of each pair twisting unit, the inner wall of the wrapping layer is provided with a plurality of buffer strips which are uniformly distributed along the circumferential direction, the cross section of each buffer strip is of a semicircular structure, and each buffer strip is an elastic buffer strip;

the inside of buffering strip is equipped with the crooked strip that parallels with buffering strip length direction, the lath that the crooked strip was made for elastic plastic, the cross section of crooked strip is the arc structure, set up the mounting groove that a plurality of set up along its length direction equidistant on the crooked strip, every all install buffer spring in the mounting groove, every buffer spring's both ends are connected respectively in the lateral wall of crooked strip and the tank bottom of mounting groove.

Further, the inner wall of buffer layer is equipped with a plurality of along circumferencial direction evenly distributed's anti layering, every the cross section of anti layering is M type structure, it all is equipped with two rubber strips, two to correspond every anti layering around the outer wall of covering the rubber strip all contradicts rather than the resistance to compression strip that corresponds.

Furthermore, the anti-pressing strip is an elastic plastic strip.

Furthermore, the wrapping layer is a polyester tape wrapping layer.

Further, the insulating layer is made of a polyethylene insulating material.

Furthermore, the shielding layer is a copper wire braided shielding layer.

Further, the outer sheath is made of flame-retardant polyvinyl chloride materials.

The utility model discloses an improve and provide a fire-retardant polyvinyl chloride sheath intrinsic safety type computer cable of polyethylene insulation here, compare with prior art, have following improvement and advantage:

one of the two buffer strips is arranged on the inner wall of the wrapping layer, the plurality of buffer strips are uniformly distributed along the circumferential direction, the cross section of each buffer strip is of a semicircular structure, each buffer strip is an elastic buffer strip, each pair twisting unit can be buffered and protected by each buffer strip, the pair twisting units are prevented from being pressed by external force to cause large damage, and the compression resistance of the cable is further improved; the technical problem that the compression resistance of a cable structure for a computer in the prior art is weak is solved.

Secondly, in order to further buffer and protect the twisted units, a plurality of anti-pressing strips which are uniformly distributed along the circumferential direction are arranged on the inner wall of the buffer layer, bent strips which are parallel to the length direction of the buffer strips are arranged inside the buffer strips, the bent strips are laths made of elastic plastics, and the cross sections of the bent strips are arc-shaped structures; the bending strip can improve the bending resistance of the cable, the cable is prevented from being damaged due to long-time bending rotation of the cable, and the buffer spring can further buffer and protect the twisted unit; and the bending strip can improve the bending resistance of the cable, and avoid the cable from being damaged due to long-time bending rotation.

Thirdly, the flame-retardant effect of the cable can be improved through the flame-retardant graphite powder filling layer; the outer sheath is made of flame-retardant polyvinyl chloride materials, and the flame-retardant effect of the cable is further improved by the outer sheath made of the flame-retardant polyvinyl chloride materials.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is a schematic partial cross-sectional view of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Description of reference numerals:

1. a pair twisting unit; 11. wrapping a covering; 12. an insulating layer; 13. a conductor; 14. dividing a shielding layer; 2. an outer sheath; 3. a buffer layer; 4. a shielding layer; 5. a flame-retardant graphite powder filling layer; 6. a buffer strip; 61. bending the strip; 62. mounting grooves; 63. a buffer spring; 7. anti-pressing strips; 71. a rubber strip.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described, 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 discloses an improve and provide a fire-retardant polyvinyl chloride sheath of polyethylene insulating this ampere of type computer cable here, as shown in fig. 1-fig. 3, including a plurality of pair twist units 1 and parcel around covering 11 in a plurality of pair twist units 1 outsides, every pair twist unit 1 is formed by two conductor 13 pair twists, every conductor 13's the outside has all wrapped up insulating layer 12, wherein: the cable is characterized by further comprising an outer sheath 2, a buffer layer 3 sleeved on the wrapping layer 11 and a shielding layer 4 wrapped on the buffer layer 3, wherein the outer side of each pair twisting unit 1 is wrapped with a sub-shielding layer 14, the outer sheath 2 is wrapped on the outer side of the shielding layer 4, a flame-retardant graphite powder filling layer 5 is filled between the inner side of the wrapping layer 11 and the outer side of an insulating layer 12 of each pair twisting unit 1, a plurality of buffering strips 6 uniformly distributed along the circumferential direction are arranged on the inner wall of the wrapping layer 11, the cross section of each buffering strip 6 is of a semicircular structure, and each buffering strip 6 is an elastic buffering strip; oversheath 2 adopts fire-retardant polyvinyl chloride material to have fire-retardant, insulating, corrosion-resistant performance, comes right the utility model discloses a cable effectively protects, and fire-retardant graphite powder filling layer 5 can play fire-retardant effect, and buffering strip 6 can cushion and protect pair twist unit 1, avoids pair twist unit 1 to receive external force to press down and take place great damage, and then has improved the compressive property of this cable.

The buffer strip 6 is internally provided with a bent strip 61 parallel to the length direction of the buffer strip 6, the bent strip 61 is a strip made of elastic plastics, the cross section of the bent strip 61 is of an arc-shaped structure, the bent strip 61 is provided with a plurality of mounting grooves 62 arranged at equal intervals along the length direction, each mounting groove 62 is internally provided with a buffer spring 63, and two ends of each buffer spring 63 are respectively connected to the side wall of the bent strip 61 and the bottom of the mounting groove 62; the bending strip 61 can improve the bending resistance of the cable, avoid the cable from being damaged due to long-time bending rotation, and the buffer spring 63 can further buffer and protect the twisted unit 1.

In order to further buffer and protect the pair twisting unit 1, specifically, the inner wall of the buffer layer 3 is provided with a plurality of compression resistant strips 7 which are uniformly distributed along the circumferential direction, the cross section of each compression resistant strip 7 is of an M-shaped structure, the outer wall of the wrapping layer 11 is provided with two rubber strips 71 corresponding to each compression resistant strip 7, and the two rubber strips 71 are abutted against the compression resistant strips 7 corresponding to the two rubber strips 71; anti layering 7 can cushion conductor 13, and then improves the utility model discloses the compressive property of cable, buffering strip 6 is contradicted with resistance to compression strip 7, comes to counter layering 7 and carries out the buffer protection.

In order to further improve the bending resistance of the cable of the present invention, specifically, the anti-pressing strip 7 is an elastic plastic strip; the elastic plastic strip can prevent the cable from bending.

In order to further improve the flame retardant effect of the cable of the present invention, specifically, the wrapping layer 11 is a polyester tape wrapping layer, and the polyester tape wrapping layer has the advantages that firstly, the minimum overall size of the cable can be ensured; and the cable has the advantage of stable structure and ensures the roundness of the cable.

Specifically, the insulating layer 12 is made of a polyethylene insulating material; to provide insulation to the conductor 13.

Specifically, the shielding layer 4 is a copper wire braided shielding layer; the shielding layer braided by the copper wire has excellent shielding efficiency, and can well prevent electromagnetic interference caused in the energy transfer process.

Specifically, the outer sheath 2 is made of flame-retardant polyvinyl chloride material; the flame-retardant polyvinyl chloride material has a flame-retardant effect, and the color of the outer sheath 2 is blue according to the requirements of intrinsic safety systems, so that the outer sheath can be distinguished from cables for non-intrinsic safety systems.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a fire-retardant polyvinyl chloride sheath of polyethylene insulating intrinsically safe type computer cable, includes a plurality of pair twist unit (1) and wraps up around covering (11) in a plurality of pair twist unit (1) outsides, every pair twist unit (1) is formed by two conductor (13) pair twist, every the outside of conductor (13) all wraps up insulating layer (12), its characterized in that: the cable is characterized by further comprising an outer sheath (2), a buffer layer (3) sleeved on the winding layer (11) and a shielding layer (4) wrapped on the buffer layer (3), wherein the outer side of each pair-twisting unit (1) is wrapped with a sub-shielding layer (14), the outer sheath (2) is wrapped on the outer side of the shielding layer (4), a flame-retardant graphite powder filling layer (5) is filled between the inner side of the winding layer (11) and the outer side of an insulating layer (12) of each pair-twisting unit (1), a plurality of buffer strips (6) uniformly distributed in the circumferential direction are arranged on the inner wall of the winding layer (11), the cross section of each buffer strip (6) is of a semicircular structure, and each buffer strip (6) is an elastic buffer strip;

the inside of buffering strip (6) is equipped with crooked strip (61) that parallel with buffering strip (6) length direction, crooked strip (61) are the lath that elastic plastic made, the cross section of crooked strip (61) is the arc structure, set up mounting groove (62) that a plurality of set up along its length direction equidistant on crooked strip (61), every all install buffer spring (63), every in mounting groove (62) the both ends of buffer spring (63) are connected respectively in the lateral wall of crooked strip (61) and the tank bottom of mounting groove (62).

2. The intrinsically safe computer cable with the polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein: the inner wall of buffer layer (3) is equipped with a plurality of along circumferencial direction evenly distributed's anti layering (7), every the cross section of anti layering (7) is M type structure, correspond every anti layering (7) around the outer wall of covering (11) and all be equipped with two rubber strip (71), two rubber strip (71) all contradicts with its anti layering (7) that correspond.

3. The intrinsically safe computer cable with the polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 2, wherein: the anti-pressing strip (7) is an elastic plastic strip.

4. The intrinsically safe computer cable with the polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein: the wrapping layer (11) is a polyester tape wrapping layer.

5. The intrinsically safe computer cable with the polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein: the insulating layer (12) is made of polyethylene insulating material.

6. The intrinsically safe computer cable with the polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein: the shielding layer (4) is a copper wire braided shielding layer.

7. The intrinsically safe computer cable with the polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein: the outer sheath (2) is made of flame-retardant polyvinyl chloride materials.