CN218159685U

CN218159685U - Composite multi-tube digital transmission tri-coaxial cable

Info

Publication number: CN218159685U
Application number: CN202222271890.2U
Authority: CN
Inventors: 赵京城; 李华锋; 崔晓明; 许东升; 安富涛
Original assignee: Huizhou LTK Electronic Cable Co Ltd; LTK Electric Wire Huizhou Co Ltd; LTK Electric Wire Changzhou Co Ltd
Current assignee: Huizhou LTK Electronic Cable Co Ltd; LTK Electric Wire Huizhou Co Ltd; LTK Electric Wire Changzhou Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-27
Anticipated expiration: 2032-08-29

Abstract

A composite multi-tube digital transmission triaxial cable comprises a central layer, a middle layer and an outer layer; the central layer comprises a second layer of braided strips, three first wire cores and three groups of second wire cores; the middle layer comprises a third layer of weaving strips and eight groups of third wire cores; the outer layer comprises an outer cover and a plastic iron sheet; each first wire core comprises a first conductor, a first layer of woven strips and an inner protection layer, the first layer of woven strips wraps the outer side of the first conductor, the inner protection layer wraps the outer side of the first layer of woven strips, the three first wire cores are adjacent in pairs, and the three first wire cores are wrapped by the second layer of woven strips; each group of second wire cores consists of two second conductors; each group of third wire cores consists of two third conductors; the plastic iron sheet is embedded in the middle of the outer quilt, the outer quilt is wrapped outside the third layer of woven strips, and the first conductor, the second conductor and the third conductor are composed of a plurality of conductors; the utility model discloses compact structure, and inner structure is stable, is guaranteeing under the correct condition of signal transmission, has improved anti-interference effect.

Description

Composite multi-tube digital transmission tri-coaxial cable

Technical Field

The utility model belongs to the technical field of the cable, concretely relates to compound multitube digital transmission triaxial cable.

Background

With the rapid development of economy and society, digital televisions have entered every family. The coaxial cable commonly used in the market is generally composed of an inner conductor, an insulating layer, an outer conductor shielding layer plastic composite tape, a copper wire braided tape and an insulating sheath. However, when the existing coaxial cable is applied, the transmission signal has defects: the shielding effect is not ideal, and in some occasions with many signal sources, transmission signals are easily interfered, so that the signals are obviously distorted, and the shielding efficiency is only seventy-five decibels; when signals are transmitted, noise is generated, and the noise is increased along with the increase of the transmission frequency of the signals, so that the effect of receiving the signal frequency by the terminal equipment is greatly influenced.

The product is used for color difference signal transmission high-definition image control equipment. The center is composed of three coaxial lines, the anti-interference effect is better than that of a conventional twisted pair, the three coaxial lines are cabled with the multiple twisted pair lines and are woven twice, the coding line units are integrated to transmit signals, and meanwhile the shielding effect is improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an in solving and being arranged in high-end technical equipment such as medical equipment, precision control equipment, current signal conductive cable can not have good pliability simultaneously, low temperature resistant and three big advantages of low noise and reach technical index, can not satisfy the technical problem of the operation requirement of certain high-end technical equipment, aim at providing a low temperature resistant low noise flexible cable.

In order to solve the above problem, the utility model provides a following technical scheme: a composite multi-tube digital transmission triaxial cable comprises a central layer, a middle layer and an outer layer; the central layer comprises a second layer of weaving strips, three first wire cores and three groups of second wire cores; the middle layer comprises a third layer of weaving strips and eight groups of third wire cores; the outer layer comprises an outer cover and a plastic iron sheet; each first wire core comprises a first conductor, a first layer of woven strips and an inner protection layer, the first layer of woven strips wraps the outer side of the first conductor, the inner protection layer wraps the outer side of the first layer of woven strips, the three first wire cores are adjacent in pairs, and the three first wire cores are wrapped by the second layer of woven strips; each group of the second wire cores consists of two second conductors, and the second wire cores are positioned between every two first wire cores and the second layer of the braided strips; each set of the third cores is composed of two third conductors, and the third cores are positioned between the second layer of the braided strips and the third layer of the braided strips; the plastic iron sheet is embedded in the middle of the outer quilt, the outer quilt is wrapped outside the third-layer woven strip, and the first conductor, the second conductor and the third conductor are composed of a plurality of conductors.

Preferably, the central layer further comprises a first wrapping band and a second wrapping band, the first wrapping band is located on the inner side of the second layer of woven strips, and the second wrapping band is located on the outer side of the second layer of woven strips.

Preferably, the middle layer further comprises a third wrapping tape and a fourth wrapping tape, the third wrapping tape is located on the inner side of the third layer of the woven strips, and the fourth wrapping tape is located on the outer side of the third layer of the woven strips.

Preferably, the core layer further comprises six first layer fillings, the cross section of the first layer filling perpendicular to the axis is circular, and the first layer filling is located among the second wire core, the first wire core and the first wrapping band.

Preferably, the middle layer further comprises eight second layer fillings, the cross section of each second layer filling perpendicular to the axis is oval, and each second layer filling is located between two adjacent third line cores.

Preferably, the three first wire cores are completely untwisted, and the twist-to-pitch ratio of the second conductor and the third conductor is below eight times.

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

1. the three coaxial cables and the multiple pairs of twisted wires are integrated, so that the occupied space of the wires is reduced;

2. a coaxial or pair-twisted structure and three-layer weaving are adopted, so that the shielding effect is greatly improved;

3. the maximum torsion withdrawal rate of the conventional wire is one hundred percent, the torsion withdrawal rate of the wire of the specification reaches over one hundred and fifty percent, and the matched wire is cabled to completely release the torsion;

4. the insulating and outer covering with high mechanical performance is selected, and the two million times of drag chain effects can be met.

Drawings

Fig. 1 is a radial cross-sectional view of an embodiment of the invention.

Fig. 2 is a radial cross-sectional view of a center layer of an embodiment of the present invention.

Fig. 3 is a radial cross-sectional view of an intermediate layer of an embodiment of the invention.

Fig. 4 is a radial cross-sectional view of the outer layer of an embodiment of the invention.

Fig. 5 is a perspective view of twisting the second cores according to the embodiment of the present invention.

Fig. 6 is a perspective view of twisting of a third core according to an embodiment of the present invention.

In the figure, 1, a first wire core, 2, a second wire core, 3, a third wire core, 4, a first wrapping tape, 5, a second wrapping tape, 6, a third wrapping tape, 7, a fourth wrapping tape, 8, an inner protective layer, 9, an outer cover, 10, a first layer of woven strips, 11, a second layer of woven strips, 12, a third layer of woven layers, 13, a first layer of filled 14, a second layer of filled materials, 15, a plastic iron sheet, 16, a first conductor, 17, a second conductor, 18, a third conductor, 19, a center layer, 20, a middle layer and 21, an outer layer.

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.

Referring to fig. 1-6, a composite multi-tube digital transmission triaxial cable includes a central layer 19, an intermediate layer 20, and an outer layer 21; the central layer 19 comprises a second layer of weaving strips 11, three first wire cores 1 and three groups of second wire cores 2; the middle layer 20 comprises a third layer of knitted strips 12 and eight sets of third cords 3; the outer layer 21 comprises an outer cover 9 and a ductile iron sheet 15; each first wire core 1 comprises a first conductor 16, a first layer of woven strips 10 and an inner protection layer 8, the first layer of woven strips 10 wraps the outer side of the first conductor 16, the inner protection layer 8 wraps the outer side of the first layer of woven strips 10, every two of the three first wire cores 1 are adjacent, and the three first wire cores 1 are wrapped by a second layer of woven strips 11; each group of the second wire cores 2 consists of two second conductors 17, and the second wire cores 2 are positioned between each two first wire cores 1 and the second layer of the braided strips 11; each group of the third wire cores 3 consists of two third conductors 18, and the third wire cores 3 are positioned between the second layer of the weaving strips 11 and the third layer of the weaving strips 12; the plastic iron sheet 15 is embedded in the middle of the outer cover 9, the outer cover 9 is wrapped outside the third layer of woven strip 12, and the first conductor 16, the second conductor 17 and the third conductor 18 consist of a plurality of 6 types of conductors; the conductor adopts 6 types of ultra-soft conductors to improve the flexibility of the wire rod, the abrasion to the cable can be reduced during use, the service life of the cable is prolonged, the three coaxial wires in the center adopt foamed insulation PE to meet the impedance requirement, the wire diameter is reduced while the transmission performance of the wire is ensured, the core wires are woven after insulation extrusion and the inner protective layer 8 is extruded, the anti-interference effect is greatly improved, the stable structure is ensured, and the occupied space of the wire rod is reduced; the twisted pair unit core wires are insulated by PE, so that the mechanical property is met while the wire diameter is reduced; the plastic iron sheet 15 can shape the cable, so that the shape of the cable can be fixed when the cable is used conveniently; the shielding effect can be greatly improved by adopting three-layer weaving; the inner sheath layer 8 is made of TPU materials, the wear-resisting and tensile-resisting capacity of the wire is improved, and the outer sheath layer 9 is made of PVC plastic particles, so that the cable has excellent mechanical properties, chemical corrosion resistance, good weather resistance, good insulating property, easiness in processing and the like; the first layer of braided strips 10, the second layer of braided strips 11 and the third layer of braided strips 12 are made of silver-plated copper conductors, and the braiding mode is a quincuncial crossing method, so that the flexibility of the cable can be ensured, and the interference of outer electromagnetic waves on the cable can be shielded.

The central layer 19 further comprises a first wrapping tape 4 and a second wrapping tape 5, the first wrapping tape 4 is positioned on the inner side of the second layer of weaving strips 11, and the second wrapping tape 5 is positioned on the outer side of the second layer of weaving strips 11; the belt is made of special adhesive tape to increase the strength of the belt, the central unit is made of back-twist cable, the back-twist rate is more than one hundred percent, so that the center is completely back-twisted, and the twisting phenomenon is avoided.

The middle layer 20 further comprises a third wrapping tape 6 and a fourth wrapping tape 7, the third wrapping tape 6 is positioned on the inner side of the third layer of woven strips 12, and the fourth wrapping tape 7 is positioned on the outer side of the third layer of woven strips 12; the inner structure can be protected to the bandeau, guarantees that the cable is under the condition that satisfies the impedance, and the deformation is hindered to the disappearance, increases cable life.

The central layer 19 further comprises six first-layer fillers 13, the cross section of the first-layer fillers 13 perpendicular to the axis is circular, the first-layer fillers 13 are located between the second wire core 2, the first wire core 1 and the first wrapping tape 4, the inner structure of the cable can be effectively fixed through filling, and the deformation of the wire cores caused by multiple machining procedures is prevented.

The middle layer 20 further comprises eight second layer fillings 14, the cross section of each second layer filling 14, which is perpendicular to the axis, is an ellipse, and each second layer filling 14 is located between two adjacent third cores 3; the filler can play a certain role in sound insulation besides fixing the internal structure, so that effective transmission of signals is guaranteed; the first layer of packing 13 and the second layer of packing 14 adopt copper core conductor and carbon fiber to constitute for cable stable in structure reduces the distortion of cable, increases life.

The three first wire cores 1 are completely untwisted, and the pair twisting pitch diameter ratio of the second conductor 17 and the third conductor 18 is below eight times; the pair twisting adopts the pitch diameter ratio below eight times, improves the wire rod transmission effect and improves the structural stability at the same time, and prevents the wire rod from being broken by extrusion deformation in the production process.

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. The utility model provides a compound multitube digital transmission triaxial cable which characterized in that: comprising a central layer (19), an intermediate layer (20) and an outer layer (21); the central layer (19) comprises a second layer of weaving strips (11), three first bobbins (1) and three groups of second bobbins (2); the middle layer (20) comprises a third layer of weaving strips (12) and eight groups of third wire cores (3); the outer layer (21) comprises an outer cover (9) and a plastic iron sheet (15); each first bobbin (1) comprises a first conductor (16), a first layer of woven strips (10) and an inner protection layer (8), the first layer of woven strips (10) wraps the outer side of the first conductor (16), the inner protection layer (8) wraps the outer side of the first layer of woven strips (10), the three first bobbins (1) are adjacent to each other in pairs, and the three first bobbins (1) are wrapped by the second layer of woven strips (11); each group of the second wire cores (2) consists of two second conductors (17), and the second wire cores (2) are positioned between every two first wire cores (1) and the second layer of the braided strips (11); each set of said third wicks (3) consists of two third conductors (18), said third wicks (3) being located between said second layer of woven strips (11) and said third layer of woven strips (12); the plastic iron sheet (15) is inlaid in the middle of the outer cover (9), the outer cover (9) is wrapped outside the third-layer woven strip (12), and the first conductor (16), the second conductor (17) and the third conductor (18) are composed of a plurality of 6 types of conductors.

2. The composite multi-tube digital transmission triaxial cable according to claim 1, wherein: the central layer (19) further comprises a first wrapping tape (4) and a second wrapping tape (5), the first wrapping tape (4) is located on the inner side of the second layer of woven strips (11), and the second wrapping tape (5) is located on the outer side of the second layer of woven strips (11).

3. The composite multi-tube digital transmission triaxial cable according to claim 2, wherein: the middle layer (20) further comprises a third wrapping tape (6) and a fourth wrapping tape (7), the third wrapping tape (6) is located on the inner side of the third layer of woven strips (12), and the fourth wrapping tape (7) is located on the outer side of the third layer of woven strips (12).

4. The composite multi-tube digital transmission triaxial cable of claim 3, wherein: the core layer (19) further comprises six first-layer fillers (13), the cross section of each first-layer filler (13) perpendicular to the axis is circular, and the first-layer fillers (13) are located among the second line cores (2), the first line cores (1) and the first wrapping tape (4).

5. The composite multi-tube digital transmission triaxial cable of claim 4, wherein: the middle layer (20) further comprises eight second layer fillings (14), the cross section of each second layer filling (14) perpendicular to the axis is oval, and each second layer filling (14) is located between two adjacent third mandrels (3).

6. The composite multi-tube digital transmission triaxial cable of claim 5, wherein: the three first wire cores (1) are completely untwisted, and the twist-to-twist pitch diameter ratio of the second conductor (17) and the third conductor (18) is below eight times.