CN214152552U

CN214152552U - Composite shielded cable

Info

Publication number: CN214152552U
Application number: CN202120360001.2U
Authority: CN
Inventors: 马仕兴
Original assignee: Jiangsu Maixun Electronic Technology Co ltd
Current assignee: Jiangyin Qianlima Electrical Material Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-09-07
Anticipated expiration: 2031-02-09

Abstract

The utility model discloses a belong to wire and cable technical field, specifically be a compound shielded cable, including oversheath, shielding area and sinle silk, its technical scheme is: the sinle silk is including the band, the band outer wall is equipped with the shielding area, the shielding area includes baseband one, baseband one heliciform winds at the band outer wall, baseband one outer wall is equipped with baseband two, baseband two heliciform winds at baseband one outer wall, the beneficial effects of the utility model are that: the first base band, the second base band and one end part of the third base band in the width direction are folded back and are wound in a mode of overlapping the folded parts, so that the overlapped parts are mutually in electric contact with the aluminum foil sleeve, the electromagnetic interference characteristic of the shielding performance is improved, the first guide screen wire and the second guide screen wire are wound and wound in the same direction at the joint of the first base band, the second base band and the third base band, the electric grounding connection operation of the first guide screen wire and the second guide screen wire is facilitated, and the cable interference current is conveniently led into the ground.

Description

Composite shielded cable

Technical Field

The utility model relates to a wire and cable technical field, concretely relates to composite shielded cable.

Background

With the continuous development of industry in recent years, the cable is widely applied in the fields of modern infrastructure, digital interconnection, rail transit, information transmission and the like, the cable is different in application scene and application specification and application requirements, meanwhile, the cable is limited in use environment space so as to cause the installation limitation, the installation difficulty is increased due to the limited operable space, and the cable can be sometimes installed in places with electrostatic hazard, such as flammable and explosive places and sometimes exposed under the harsh conditions of coexistence of high-temperature and severe-cold pressure steam and chemical liquid.

The prior art has the following defects: most of the existing shielding systems adopt a metal material shielding layer coated on the outer surfaces of the cables and the connecting pieces, for a shielding system, it is not sufficient to have a metallic shielding layer alone, but more importantly, the shielding layer must be grounded perfectly, so that the interference current can be effectively conducted to the ground, in practical construction, due to the harsh requirement of the shielding system for grounding, poor grounding, such as excessive grounding resistance and unbalanced grounding potential, is easily caused, so that a potential difference is generated between two points of the transmission system, and then current flows on the metal shielding layer, which causes discontinuity of the shielding layer and destroys the integrity of the shielding layer, and at this time, the shielding layer itself becomes a maximum interference source, therefore, the performance of the system is rather inferior to that of an unshielded system, and once any point fails to meet the shielding requirement, the overall transmission performance of the system is affected.

Therefore, the utility model discloses a compound shielded cable is very necessary.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a composite shielded cable, through with baseband one, baseband two and three width direction's of baseband a tip turn back and overlap with the mode of the partial overlap that should turn back, make overlap portion and aluminium foil cover mutual electrical contact, make shielding performance electromagnetic interference characteristic improve, lead screen line one and lead screen line two at baseband one, baseband two and three junctions of baseband towards the equidirectional coiling, make the easy of the operation of being connected of the electric ground connection of lead screen line one and lead screen line two, with the problem of the leading-in ground of solution cable interference current.

In order to achieve the above object, the present invention provides the following technical solutions: a composite shielding cable comprises an outer sheath, a shielding belt and a wire core, wherein the wire core comprises a belt, the outer wall of the belt is provided with the shielding belt, the shielding belt comprises a first base belt, the first base belt is spirally wound on the outer wall of the belt, the first outer wall of the first base belt is provided with a second base belt, the second base belt is spirally wound on the outer wall of the first base belt, the third base belt is spirally wound on the outer wall of the second base belt, a second guide screen wire is spirally wound at the joint of the first base belt and the second base belt, and a first guide screen wire is spirally wound at the joint of the second base belt and the third base belt.

Preferably, the winding directions of the first guide screen wire and the second guide screen wire are the same as those of the second base band and the third base band, and the widths of the first base band, the second base band and the third base band are the same.

Preferably, the second base band comprises a first metal layer, the first metal layer is in contact with the outer wall of the first base band, a first resin layer is fixedly mounted on the outer wall of the first metal layer, the third base band comprises a second metal layer, the second metal layer is in contact with the first resin layer, and a second resin layer is fixedly mounted on the outer wall of the second metal layer.

Preferably, the outer wall of the resin layer is wrapped by an aluminum foil sleeve, the outer wall of the aluminum foil sleeve is wrapped by an inner sheath, the outer wall of the inner sheath is wrapped by a copper wire woven mesh, and the outer wall of the copper wire woven mesh is wrapped by an outer sheath.

Preferably, the inner wall of the wrapping tape is provided with three groups of soft copper strips, fillers are arranged between the soft copper strips and the wrapping tape, the inner wall of each soft copper strip is provided with an outer semiconductor shielding layer, the inner wall of each outer semiconductor shielding layer is provided with a copper conductor, the outer wall of each copper conductor is wrapped with an inner semiconductor shielding layer, and an insulating layer is arranged between each inner semiconductor shielding layer and each outer semiconductor shielding layer.

Preferably, the outer wall of the aluminum foil sleeve is wrapped with a protective sleeve.

The utility model has the advantages that:

1. the first conducting screen wire and the second conducting screen wire are wound and wound in the same direction at the connecting positions of the first base belt, the second base belt and the third base belt, so that the connection operation of the first conducting screen wire and the second conducting screen wire to the electric ground is facilitated, and the effect of guiding the cable interference current to the ground is achieved;

2. there is the aluminium foil cover through the parcel of resin layer outer wall, and aluminium foil cover outer wall parcel has the inner sheath, and inner sheath outer wall parcel has the copper wire mesh grid, and aluminium foil cover cable foil utilizes the seal and the shielding nature of aluminium foil, behind the plastic film on single face or the two-sided coating, the soft copper in-band wall is provided with outer semiconductor shield, and outer semiconductor shield inner wall is equipped with the copper conductor, and copper conductor outer wall parcel has interior semiconductor shield, has multiple shielded effect.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1 according to the present invention;

fig. 3 is a schematic cross-sectional structure diagram of embodiment 1 of the present invention;

fig. 4 is a schematic diagram of a section structure of a wire core according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a protective cover installation structure of embodiment 2 of the present invention.

In the figure: the cable comprises an outer sheath 100, a copper wire mesh grid 110, an inner sheath 120, an aluminum foil sheath 130, a protective sheath 140, a shielding tape 200, a first base tape 210, a second base tape 220, a first resin layer 221, a first metal layer 222, a third base tape 230, a second resin layer 231, a second metal layer 232, a first screen guide wire 240, a second screen guide wire 250, a wire core 300, a soft copper tape 310, an outer semiconductor shielding layer 320, an insulating layer 330, an inner semiconductor shielding layer 340, a copper conductor 350, a wrapping tape 360 and a filler 370.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to fig. 1-4, the utility model provides a composite shielded cable, including oversheath 100, shielding area 200 and sinle silk 300, sinle silk 300 includes band 360, the outer wall of band 360 is equipped with shielding area 200, shielding area 200 includes baseband one 210, baseband one 210 spirals at the outer wall of band 360, baseband one 210 outer wall is equipped with baseband two 220, baseband two 220 spirals at baseband one 210 outer wall, baseband two 220 outer wall is equipped with baseband three 230, baseband three 230 spirals at baseband two 220 outer walls, the connection of baseband one 210 and baseband two 220 is spiral winding has guide screen line two 250, the connection of baseband two 220 and baseband three 230 is spiral winding has guide screen line one 240, specifically, band 310 adopts the non-woven fabrics as the material, can resist high temperature, bears 230 degrees and does not melt indeformable, non-woven fabrics has fine corrosion resistance, can resist vulcanization, has good tensile strength, protects the wire core 300 by the wrapping tape 310, when the first base band 210, the second base band 220 and the third base band 230 are wound, the first base band 210, the second base band 220 and the third base band 230 are prevented from being damaged due to contact with the wire core 300, gaps of step differences caused by overlapping of the first base band 210, the second base band 220 and the third base band 230 due to spiral winding are formed, the first guide screen wire 240 and the second guide screen wire 250 have the filling function, the first guide screen wire 240 and the second guide screen wire 250 are stranded wires made of copper alloy, disconnection can be inhibited, flexibility is improved, breakage current leakage occurs to cable cores, the first guide screen wire 240 and the second guide screen wire 250 can enable the leaked current to flow into a grounding network, interference current is effectively led into the ground, the safety protection function is achieved, the first guide screen wire 240, the second guide screen wire 250, the first metal layer 222 and the second metal layer 232 are in contact, and even under the condition that a shielding cable is bent, the shielding performance can be inhibited from being reduced;

further, the winding directions of the first conducting screen wire 240, the second conducting screen wire 250, the second base band 220 and the third base band 230 are the same, the widths of the first base band 210, the second base band 220 and the third base band 230 are the same, specifically, the first conducting screen wire 240 and the second conducting screen wire 250 can be in line contact with the metal layer 41 and the metal layer 51 in the full-length range of the part clamped by the second base band 220 and the third base band 230, so that the contact between the first conducting screen wire 240 and the second conducting screen wire 250 and the first metal layer 222 and the second metal layer 232 is better, the shielding performance of the cable is further improved, the first base band 210, the second base band 220 and the third base band 230 have a shielding effect, and the interference of external irrelevant signals on transmission signals is reduced;

further, the second base band 220 includes a first metal layer 222, the first metal layer 222 contacts with the outer wall of the first base band 210, a first resin layer 221 is fixedly mounted on the outer wall of the first metal layer 222, the third base band 230 includes a second metal layer 232, the second metal layer 232 contacts with the first resin layer 221, and a second resin layer 231 is fixedly mounted on the outer wall of the second metal layer 232, specifically, the first metal layer 222 and the second metal layer 232 are made of aluminum alloy, so that the shielded cable 1 can be lightened and the cost can be reduced, and the first resin layer 221 and the second resin layer 231 have the function of separating the first metal layer 222 from the second metal layer 232, so that the resistance is reduced, and the shielding performance of the shielded cable is further improved;

further, the outer wall of the second resin layer 231 is wrapped with an aluminum foil sleeve 130, the outer wall of the aluminum foil sleeve 130 is wrapped with an inner sheath 120, the outer wall of the inner sheath 120 is wrapped with a copper wire mesh grid 110, the outer wall of the copper wire mesh grid 110 is wrapped with an outer sheath 100, and specifically, the aluminum foil sleeve 130 is formed by coating a plastic film on one side or two sides by utilizing the sealing property and shielding property of an aluminum foil, the aluminum foil sleeve 130 has a shielding effect and is used for reducing interference of extraneous signals to transmission signals, the inner sheath 120 has an insulating and protecting effect, the copper wire mesh grid 110 is a galvanized copper wire shielding mesh grid, the weaving is similar to that of an inclined bag, the shielding effect is achieved, the interference degree of the cable is improved, the influence of an external electric field and a magnetic field is prevented, the copper wire mesh grid 110 has the effects of non-directional shielding, good high-frequency shielding property and unchanged shielding property in bending, and the outer sheath 100 has a protecting effect on the copper wire mesh grid 110;

furthermore, the inner wall of the wrapping tape 360 is provided with the soft copper strips 310, the soft copper strips 310 are provided with three groups, a filler 370 is arranged between the soft copper strips 310 and the wrapping tape 360, the inner wall of the soft copper strips 310 is provided with the outer semiconductor shielding layer 320, the inner wall of the outer semiconductor shielding layer 320 is provided with the copper conductor 350, the outer wall of the copper conductor 350 is wrapped with the inner semiconductor shielding layer 340, an insulating layer 330 is arranged between the inner semiconductor shielding layer 340 and the outer semiconductor shielding layer 320, specifically, the soft copper strips 310 have a shielding effect on the three groups of copper conductors 350 to prevent the three groups of copper conductors 350 from interfering with each other, the filler 370 is made of a glass fiber material, so that the cable is tight and has no gap, the appearance of the cable is round, the insulating layer 330 is uniformly wrapped by the outer semiconductor shielding layer 320 and the inner semiconductor shielding layer 340 to enable the insulating layer 330 to have a better contact effect with the copper conductor 350, and the copper conductor 350 is a conductive part of the cable, has the function of transmitting electric energy.

The utility model discloses a use as follows: the staff in this field need will be when using the utility model.

Example 2:

referring to fig. 5 of the specification, the solid tire with high grip of the embodiment further includes a shield 140;

further, the outer wall of the aluminum foil sleeve 130 is wrapped by a protective sleeve 140, the protective sleeve 140 has a protective effect on the cable, the protective sleeve 140 is made of high-density polyethylene, the protective sleeve 140 has high stability and reliability, physical and mechanical properties of the optical cable are guaranteed, the protective sleeve is suitable for laying conditions and environmental aging, running reliability and long service life are guaranteed, the protective sleeve has unique advantages, in a common electromagnetic interference environment, the shielding tape 200 can provide enough noise protection, the outer sheath 100, the copper wire mesh grid 110 and the inner sheath 120 are replaced by the protective sleeve 140, and cost can be effectively reduced.

The implementation scenario is specifically as follows: workers in the field need to replace outer sheath 100, copper wire mesh 110, and inner sheath 120 with protective sheath 140 when using the present invention.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A composite shielded cable comprises an outer sheath (100), a shielding tape (200) and a wire core (300), and is characterized in that: the cable core (300) comprises a wrapping tape (360), a shielding tape (200) is arranged on the outer wall of the wrapping tape (360), the shielding tape (200) comprises a first base tape (210), the first base tape (210) is spirally wound on the outer wall of the wrapping tape (360), a second base tape (220) is arranged on the outer wall of the first base tape (210), the second base tape (220) is spirally wound on the outer wall of the first base tape (210), a third base tape (230) is arranged on the outer wall of the second base tape (220), the third base tape (230) is spirally wound on the outer wall of the second base tape (220), a second guide screen wire (250) is spirally wound at the joint of the first base tape (210) and the second base tape (220), and a first guide screen wire (240) is spirally wound at the joint of the second base tape (220) and the third base tape (230).

2. A composite shielded electrical cable according to claim 1, wherein: the winding directions of the first conducting screen wire (240), the second conducting screen wire (250), the second base band (220) and the third base band (230) are the same, and the widths of the first base band (210), the second base band (220) and the third base band (230) are the same.

3. A composite shielded electrical cable according to claim 1, wherein: the second base band (220) comprises a first metal layer (222), the first metal layer (222) is in contact with the outer wall of the first base band (210), a first resin layer (221) is fixedly installed on the outer wall of the first metal layer (222), the third base band (230) comprises a second metal layer (232), the second metal layer (232) is in contact with the first resin layer (221), and a second resin layer (231) is fixedly installed on the outer wall of the second metal layer (232).

4. A composite shielded electrical cable according to claim 3, wherein: the outer wall of the second resin layer (231) is wrapped by an aluminum foil sleeve (130), the outer wall of the aluminum foil sleeve (130) is wrapped by an inner sheath (120), the outer wall of the inner sheath (120) is wrapped by a copper wire woven mesh (110), and the outer wall of the copper wire woven mesh (110) is wrapped by an outer sheath (100).

5. A composite shielded electrical cable according to claim 1, wherein: the interior wall of belting (360) is provided with soft copper strips (310), soft copper strips (310) are equipped with three groups, install filler (370) between soft copper strips (310) and belting (360), soft copper strips (310) inner wall is provided with outer semiconductor shield (320), outer semiconductor shield (320) inner wall is equipped with copper conductor (350), copper conductor (350) outer wall parcel has interior semiconductor shield (340), install insulating layer (330) between interior semiconductor shield (340) and the outer semiconductor shield (320).

6. The composite shielded electrical cable of claim 4, wherein: the outer wall of the aluminum foil sleeve (130) is wrapped with a protective sleeve (140).