阅读说明：本技术 一种应急用漏泄同轴电缆 (Emergency leakage coaxial cable ) 是由 刘斌 刘中华 袁纯钢 杨志行 陈永健 王寅 于 2021-03-17 设计创作，主要内容包括：本发明提供了一种应急用漏泄同轴电缆,其使得整个电缆轻便,收放方便,可以方便施工作业,为2G/3G/4G/5G系统的提供一种切实可用的漏缆产品。其包括自中心向外环面依次设置的内导体、绝缘层、外导体和护套,所述内导体的外周包覆有所述绝缘层,所述外导体具体为扁金属带包覆于所述绝缘层的外环面形成,所述内导体的外周包覆有所述绝缘层,所述扁金属带螺旋包覆于所述绝缘层的外环面、形成螺旋带,且相邻的螺旋带之间形成螺旋槽,所述螺旋槽沿着所述绝缘层的外环周均匀螺旋排布,所述护套包覆于所述扁金属带的外环周。(The invention provides an emergency leaky coaxial cable, which is light and convenient in whole cable, convenient to collect and release and convenient to construct and provide a practical and usable leaky cable product for a 2G/3G/4G/5G system. The spiral groove type cable comprises an inner conductor, an insulating layer, an outer conductor and a sheath, wherein the inner conductor, the insulating layer, the outer conductor and the sheath are sequentially arranged from the center to the outer ring surface, the insulating layer is coated on the periphery of the inner conductor, the outer conductor is formed by coating a flat metal belt on the outer ring surface of the insulating layer, the insulating layer is coated on the periphery of the inner conductor, the flat metal belt is spirally coated on the outer ring surface of the insulating layer to form a spiral belt, a spiral groove is formed between every two adjacent spiral belts, the spiral grooves are uniformly and spirally arranged along the outer ring surface of the insulating layer, and the sheath is coated on the.)

1. An emergency leaky coaxial cable, characterized by: the spiral groove type cable comprises an inner conductor, an insulating layer, an outer conductor and a sheath, wherein the inner conductor, the insulating layer, the outer conductor and the sheath are sequentially arranged from the center to the outer ring surface, the insulating layer is coated on the periphery of the inner conductor, the outer conductor is formed by coating a flat metal belt on the outer ring surface of the insulating layer, the flat metal belt is spirally coated on the outer ring surface of the insulating layer to form a spiral belt, a spiral groove is formed between every two adjacent spiral belts, the spiral grooves are uniformly and spirally distributed along the outer ring surface of the insulating layer, and the sheath is coated on the outer ring surface of.

2. An emergency leaky coaxial cable as claimed in claim 1, wherein: the flat metal belt is of a single-layer structure, the outer ring surface of the insulating layer is coated with the flat metal belt to form a spiral belt, an inner spiral groove is formed between adjacent spiral belts of the spiral belt, and the spiral belt is coated on the outer surface of the insulating layer to form a spiral groove structure with a single pitch P.

3. An emergency leaky coaxial cable as claimed in claim 1, wherein: the flat metal belt comprises an inner metal belt and an outer metal belt, the inner metal belt is wrapped on the outer annular surface of the insulating layer to form a first spiral belt, an inner spiral groove is formed between adjacent spiral belts of the first spiral belt, the outer metal belt is wrapped on the equivalent outer annular surface formed by the inner metal belt, the spiral direction of the outer metal belt is opposite to that of the first spiral belt to form a second spiral belt, a corresponding outer spiral groove is formed between adjacent spiral belts of the second spiral belt, hole grooves are formed at the overlapped positions of the inner spiral groove and the outer spiral groove, and the outer metal belt and the inner metal belt are wrapped on the outer surface of the insulating layer to form a structure with two hole grooves in a single pitch P.

4. An emergency leaky coaxial cable as claimed in claim 3, wherein: the two slots are in particular slots arranged on both sides in the case of one revolution of the helical band.

5. An emergency leaky coaxial cable as claimed in claim 4, wherein: the shape of the hole groove is a square groove, a rhombus groove or a parallelogram groove in an orthographic projection state.

6. An emergency leaky coaxial cable as claimed in claim 2 or 3, wherein: the insulating layer is formed by sintering PTFE or physically foaming polyethylene.

Technical Field

The invention relates to the technical field of radio frequency coaxial cables, in particular to an emergency leaky coaxial cable.

Background

Tunnels (mainly comprising highway tunnels, railway tunnels, subway tunnels and the like) are important scenes in mobile communication network deployment, because the tunnel structures are closed and are distributed in a strip shape along the line, different tunnels have different shapes and structures and transverse sizes (height and width), and building materials, components and proportions are different, so that the influences of different degrees on the reflection and absorption of wireless signals can be generated, meanwhile, the topography in the tunnels is complex, the extreme topography is not beneficial to construction, and the tunnel scene coverage also becomes a difficult point for mobile communication network coverage. The leaky coaxial cable is a special coaxial cable with dual functions of a transmission line and an antenna, can be laid along the wall in the tunnel and can be bent along with the tunnel, and wireless signals can be uniformly released in the tunnel without being influenced by factors such as the shape, the bending and the gradient of the tunnel, so that the leaky coaxial cable is the best choice for wireless coverage of the tunnel scene at present. The existing leaky coaxial cable is heavy, is not changed in winding and unwinding, and is greatly influenced by the terrain during construction.

Disclosure of Invention

Aiming at the problems, the invention provides the emergency leaky coaxial cable, which is light and convenient in whole cable, convenient to collect and release, convenient to construct and provide a practical and usable leaky cable product for a 2G/3G/4G/5G system.

An emergency leaky coaxial cable, characterized by: the spiral groove type cable comprises an inner conductor, an insulating layer, an outer conductor and a sheath, wherein the inner conductor, the insulating layer, the outer conductor and the sheath are sequentially arranged from the center to the outer ring surface, the insulating layer is coated on the periphery of the inner conductor, the outer conductor is formed by coating a flat metal belt on the outer ring surface of the insulating layer, the insulating layer is coated on the periphery of the inner conductor, the flat metal belt is spirally coated on the outer ring surface of the insulating layer to form a spiral belt, a spiral groove is formed between every two adjacent spiral belts, the spiral grooves are uniformly and spirally arranged along the outer ring surface of the insulating layer, and the sheath is coated on the.

It is further characterized in that: the flat metal belt is of a single-layer structure, the outer ring surface of the insulating layer is coated with the flat metal belt to form a spiral belt, an inner-layer spiral groove is formed between adjacent spiral belts of the spiral belt, and the spiral belt is coated on the outer surface of the insulating layer to form a spiral groove structure with a single pitch P;

the flat metal belt comprises an inner metal belt and an outer metal belt, the inner metal belt is coated on the outer annular surface of the insulating layer to form a first spiral belt, an inner spiral groove is formed between adjacent spiral belts of the first spiral belt, the outer metal belt is coated on the equivalent outer annular surface formed by the inner metal belt, the spiral direction of the outer metal belt is opposite to that of the first spiral belt to form a second spiral belt, a corresponding outer spiral groove is formed between adjacent spiral belts of the second spiral belt, hole grooves are formed at the overlapped positions of the inner spiral groove and the outer spiral groove, and the outer metal belt and the inner metal belt are coated on the outer surface of the insulating layer to form a structure with a single pitch P and two hole grooves;

the two hole slots are specifically hole slots arranged on two sides under the condition that the spiral belt rotates for one circle;

the shape of the hole groove is a square groove, a rhombus groove or a parallelogram groove in an orthographic projection state;

the insulating layer is formed by sintering PTFE or physically foaming polyethylene.

After the technical scheme is adopted, the insulating layer of the leaky cable is formed by sintering PTFE, 5-3800 MHz radio frequency signal transmission is met, a flat metal belt is wound on the periphery of the insulating layer to form a spiral groove or a hole groove formed by combining two groups of spiral grooves, so that the leaky cable can have reasonable radiation performance for radio frequency signals in a 450-3600 MHz frequency band, the flat metal belt is wound on the periphery of the insulating layer to form the spiral groove or the hole groove formed by combining two groups of spiral grooves, the whole cable is light and convenient to collect and release, construction operation can be facilitated, and a practical and available leaky cable product is provided for a 2G/3G/4G/5G system.

Drawings

FIG. 1 is a schematic cross-sectional view of the structural form of a single-layer flat metal strip of the present invention;

FIG. 2 is a schematic cross-sectional view of one form of construction of the double-layer flat metal strip of the present invention;

FIG. 3 is a schematic view of the arrangement of the wells in the front view of FIG. 2 (only the wells on the front side are shown);

the names corresponding to the sequence numbers in the figure are as follows:

inner conductor 1, insulating layer 2, outer conductor 3, sheath 4, flat metal strip 5, inner metal strip 51, outer metal strip 52, spiral groove 6, inner spiral groove 61, outer spiral groove 62, hole groove 7.

Detailed Description

An emergency leaky coaxial cable, as shown in fig. 1-3: it includes the inner conductor 1 that sets gradually from the central outside anchor ring, insulating layer 2, outer conductor 3 and sheath 4, the periphery cladding of inner conductor 1 has insulating layer 2, insulating layer 2 specifically forms for the PTFE sintering, outer conductor 1 specifically is 5 cladding of flat strap forms in the outer anchor ring of insulating layer 2, the periphery cladding of inner conductor 1 has insulating layer 2, 5 spiral cladding of flat strap are in the outer anchor ring of insulating layer 2, form the spiral strip, and form helicla flute 6 between the adjacent spiral strip, spiral flute 6 is arranged along the even spiral of outer loop week of insulating layer 2, 4 claddings of sheath are in the outer loop week of flat strap 5.

The first embodiment is as follows: the single-layer flat metal belt 5 is wrapped on the outer annular surface of the insulating layer 2, the flat metal belt 5 is wrapped on the outer annular surface of the insulating layer 2 in a spiral mode to form spiral belts, a spiral groove 6 is formed between every two adjacent spiral belts, the spiral groove 6 is a hole groove of the leaky cable, and the pitch of the spiral groove is P.

In the second embodiment, the flat metal strip includes an inner metal strip 51 and an outer metal strip 52, the inner metal strip 51 covers the outer annular surface of the insulating layer 2 to form a first spiral strip, an inner spiral groove 61 is formed between adjacent spiral strips of the first spiral strip, the outer metal strip 52 covers the equivalent outer annular surface formed by the inner metal strip 51, the spiral direction of the equivalent outer annular surface is opposite to that of the first spiral strip to form a second spiral strip, a corresponding outer spiral groove 62 is formed between adjacent spiral strips of the second spiral strip, a hole groove 7 is formed at the overlapping position of the inner spiral groove 61 and the outer spiral groove 62, and the outer metal strip 52 and the inner metal strip 51 cover the outer surface of the insulating layer 2 to form a structure of two hole grooves 7 with a single pitch P; the two hole slots 7 are specifically hole slots arranged on two sides under the condition that the spiral belt rotates for one circle; the shape of the hole groove 7 is a rhombus groove in an orthographic projection state, and the sizes of all the hole grooves are consistent.

In the second embodiment, the shape of the hole groove 7 may be a square groove or a parallelogram groove in the orthographic projection state.

The spiral grooves 6 in the first embodiment and the hole grooves 7 in the second embodiment are periodically arranged on the outer conductor at a pitch P, the pitch P is adjustable, and the spiral grooves 6 or the hole grooves 7 can radiate in all directions.

The principle is as follows: the insulating layer that leaks the cable forms for the PTFE sintering, satisfy 5 ~ 3800MHz radio frequency signal transmission, through the periphery at the insulating layer around the flat strap of package, form the hole groove that helicla flute or two sets of helicla flute combination formed, make it have more reasonable radiation performance to the radio frequency signal in the 450 ~ 3600MHz frequency channel, through the periphery at the insulating layer around the flat strap of package, form the hole groove that helicla flute or two sets of helicla flute combination formed, make whole cable light, it is convenient to receive and release, comparatively portable design also provides convenience for constructing in extreme environment simultaneously, outstanding bending property and bending property of cable, make cable repeatedly usable, greatly increased the life of cable, the multi-system sharing problem and the infrastructure shared sharing of the 5G communication of being convenient for construct.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.