CN210516248U

CN210516248U - Rubber jacketed flexible cable containing twisted-pair communication wires

Info

Publication number: CN210516248U
Application number: CN201921174276.6U
Authority: CN
Inventors: 钱章兴; 王兵兵; 丁国生
Original assignee: Shanghai Lanhao Electric Power Co ltd
Current assignee: Shanghai Lanhao Electric Power Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-05-12
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a rubber cover flexible cable who contains pair twist communication line, including cable core and the cladding at the outside oversheath of cable core, the cable is by central support unit, around a plurality of power sinle silks of central support unit outside, set up the communication sinle silks between a plurality of power sinle silks and constitute, the communication sinle silks comprises the outer copper wire weaving layer of communication line conductor, communication line insulation, communication line sheath and communication line sheath. The utility model discloses crowded package three-layer altogether skin bubble skin foaming polyethylene structure outside the communication line conductor adopts the form of pair twist to replace coaxial control line simultaneously, and the electric wave that each wire radiated out in the transmission like this can be offset by the electric wave that sends on another line in the use, effectively reduces signal interference's degree, guarantees the communication quality of communication line.

Description

Rubber jacketed flexible cable containing twisted-pair communication wires

Technical Field

The utility model relates to a large-scale cable for excavating machinery equipment, concretely relates to rubber cover flexible cable who contains pair twist communication line.

Background

With the development of modern mining technology, the requirements on the performance and the multiple functions of the cable are higher and higher, the traditional cable with single function is inconvenient to use, and customers also require cable enterprises to manufacture multifunctional cables so as to facilitate the use of users.

Along with the national regulation of the mining field, the unattended mine is further popularized, and the coal mining machine cable is required to have a signal transmission function, so that the mining information in the mine can be transmitted to a central control room in a high-quality mode, and the safety of personnel is ensured. In order to achieve the purpose, optical fiber transmission is the most ideal mode, but the optical fiber is compounded in the cable, on one hand, the optical fiber has the characteristic of being not resistant to bending, and on the other hand, an optical-electrical converter is required to convert an optical signal into an electrical signal, so that great popularization difficulty exists in a short period of time. Other transmission methods are that the control line unit is used as a communication unit, which results in poor transmission effect, data and image missing, delay and other problems.

At present, most of the characteristic impedance of the mining communication line is required to be 50, 75 or 120 omega, and if the characteristic impedance of the communication line in the cable does not meet the requirement, serious problems of poor communication effect and the like occur. Chinese patent CN 206741957U introduces a coal cutter cable with communication function, the communication line adopts coaxial line mode, and the communication line conductor adopts ethylene propylene rubber as insulating material, the dielectric constant of ethylene propylene rubber is usually greater than 2.5, only 50 Ω characteristic impedance insulation thickness is satisfied and all needs to reach more than 3.0mm, this makes the coaxial line external diameter greatly exceed the maximum external diameter that normal cable power line gap can be filled, lead to the coaxial line to protrude outside the cable core, and it is easy to lead the atress and core breaking in the cable use process, lead to whole cable to scrap. When the 120 omega characteristic impedance needs to be met, the coaxial control line basically cannot meet the requirement unless the outer diameter of the cable is designed to be far beyond the standard requirement, so that the cable is poor in use experience, the working energy consumption of equipment is increased, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at solving the not enough among the prior art, it is effectual to provide a communication, and life equals the pair twist communication line of power line, and with this communication line complex in power cable, because all sinle silks all have good metallic shield, the twisted pair line twists mutually according to certain density simultaneously together, and the electric wave that each wire radiated out in the transmission can be offset by the electric wave that sends on another line, effectively reduces signal interference's degree.

The technical scheme is as follows: a rubber cover flexible cable who contains pair twist communication line, including cable core and the cladding at the outside oversheath of cable core, the cable core is by central support unit, around a plurality of power sinle silks of central support unit outside, set up the communication sinle silk between a plurality of power sinle silks and constitute, the communication sinle silk comprises the outer copper wire weaving layer of communication conductor, communication line insulation, communication line sheath and communication line sheath, the inside two communication conductor that are equipped with of communication sinle silk, the outside cladding of every communication conductor has the communication line to insulate, two communication conductor adopt the form pair twist of spiral transposition to form, and the transposition pitch ratio is 6 ~ 10 times, the communication conductor cladding of communication line sheath is outside at the transposition, the outside cladding of communication line sheath has the outer copper wire weaving layer of communication line sheath.

Furthermore, the communication line insulation is a skin-foam-skin foamed polyethylene three-layer co-extrusion structure, namely, the communication line insulation is composed of solid core polyethylene, foamed polyethylene and solid core polyethylene. The dielectric constant of the polyethylene insulating layer can be adjusted by controlling the foaming degree of the middle foaming layer, so that the requirements of different characteristic impedances are met.

Further, the communication wire sheath is room temperature vulcanized silicone rubber.

Further, the outer copper wire braided layer of the communication wire sheath is formed by braiding 24 spindles of braiding machines in a forward and reverse direction, and the one-way coverage rate of the copper wires is larger than 85%.

Further, the outer sheath is made of high-flame-retardant elastomer TPU material, the oxygen index is larger than 35, the strength is larger than 30MPa, and the tear resistance is larger than 20N/mm.

Furthermore, the power wire core is composed of a power wire conductor, a power wire insulation layer and a power wire outer copper wire braided layer, the power wire outer copper wire braided layer is formed by braiding in the forward and reverse directions through a 36-spindle braiding machine, and the one-way coverage rate of the copper wires is larger than 85%.

Further, the power line insulation is ethylene propylene rubber.

Furthermore, the central support unit is formed by extruding a saddle-shaped thermosetting elastomer outside a central steel wire rope, the steel wire rope is formed by twisting a plurality of strands of thin steel wire bundles, and the steel wire rope has tensile strength and flexibility, the strength of the thermosetting elastomer is greater than 15MPa, and the hardness of the thermosetting elastomer is greater than 80 degrees.

Has the advantages that: the utility model discloses a to the improvement of communication line structure, the skin bubble skin foaming polyethylene structure of crowded package three-layer altogether outside the communication line conductor, the dielectric constant of polyethylene insulating layer can be adjusted to the degree of foaming on foaming layer in the middle of through the control to satisfy different characteristic impedance's demand. Meanwhile, a twisted-pair mode is adopted to replace a coaxial control line, so that electric waves radiated by each wire in transmission can be counteracted by electric waves emitted by the other wire in the using process, the degree of signal interference is effectively reduced, the communication wire is ensured to have good anti-interference performance through the outer copper wire braided layer of the communication wire sheath, the complete transmission of communication signals is ensured, and the communication quality of the communication wire is ensured because the electric field of the power wire does not interfere with the communication wire through the outer copper wire braided layer of the power wire.

Drawings

FIG. 1 is a sectional view of the utility model;

1. the power cable comprises a central supporting unit 2, a power cable core 21, a power cable conductor 22, a power cable insulation 23, a power cable outer copper wire braided layer 3, a communication cable core 31, a communication cable conductor 32, a communication cable insulation 33, a communication cable sheath 34, a communication cable sheath outer copper wire braided layer 4 and a sheath.

Detailed Description

The technical scheme shown in figure 1 is as follows: a rubber-jacketed flexible cable containing a pair-twisted communication line comprises a cable core and an outer sheath 4 coated outside the cable core, wherein the cable core is composed of a central supporting unit 1 and a plurality of power line cores 2 coated outside the central supporting unit 1. The communication cable core 3 is arranged among the power cable cores 2, the communication cable core 3 is composed of communication cable conductors 31, communication cable insulators 32, a communication cable sheath 33 and a communication cable sheath outer copper wire woven layer 34, two communication cable conductors 31 are arranged inside the communication cable core 3, the communication cable insulators 32 wrap the outside of each communication cable conductor 31, the two communication cable cores are formed by twisting in a spiral twisting mode, the twisting pitch diameter ratio is 6-10 times, electric waves radiated by each conducting wire in transmission in the twisting mode can be offset by electric waves sent by the other conducting wire, the degree of signal interference is effectively reduced, the communication cable sheath 33 wraps the outside of the twisted communication cable cores, and the communication cable sheath outer copper wire woven layer 34 is arranged outside the communication cable sheath 33.

In this embodiment, the communication wire insulation 32 is a skin-foam polyethylene three-layer co-extrusion structure, that is, the communication wire insulation is composed of solid polyethylene, foamed polyethylene and solid polyethylene, and the dielectric constant of the insulation layer is reduced to about 2.0 by controlling the foaming degree of the foamed polyethylene, so that the requirement of high characteristic impedance can be met by a small wall thickness.

In this example, the communication wire sheath 33 is made of room temperature vulcanized silicone rubber, so that the polyethylene insulation can be vulcanized at a temperature that is not softened, and the insulated skin-foam-skin three-layer co-extrusion structure of the communication wire is not damaged.

In this example, the outer copper wire braided layer 34 of the communication wire sheath is formed by a forward braided layer and a reverse braided layer of a 24-spindle braided layer machine, the one-way coverage rate of the copper wire is greater than 85%, and the communication wire is ensured to have good anti-interference performance, so that the complete transmission of communication signals is ensured.

In this example, the outer sheath 4 is made of a high flame retardant elastomer TPU material, has an oxygen index of more than 35, a strength of more than 30MPa, a tear resistance of more than 20N/mm, and has better wear resistance than a rubber material, thereby ensuring that the sports cable can be used for a long time.

In this example, power sinle silk 2 comprises power line conductor 21, power line insulation 22 and power line outer copper wire weaving layer 23, and power line outer copper wire weaving layer 23 is formed by 36 spindle weaving layer machines positive and negative weaving layers, and the one-way percentage of coverage of copper wire is greater than 85%, guarantees that the power line electric field does not disturb the communication line.

In this example, the power line insulation 22 is ethylene propylene rubber.

In this example, the central support unit 1 is formed by extruding a saddle-shaped thermosetting elastomer outside a central steel wire rope, the steel wire rope is formed by twisting a plurality of thin steel wire bundles, and the steel wire rope has tensile strength and flexibility, the strength of the thermosetting elastomer is greater than 15MPa, and the hardness is greater than 80 degrees.

Through the improvement to the communication line structure, the crowded skin bubble skin foaming polyethylene structure of three-layer crowded altogether of packing outside communication line conductor 31, the degree of foaming through control polyethylene controls the dielectric constant of insulating layer between 1.9 ~ 2.1, adopt the form of pair twist to replace coaxial control line simultaneously, the electric wave that each wire radiated out in the transmission can be offset by the electric wave that sends on another line like this in the use, effectively reduce signal interference's degree, through the outer copper wire weaving layer 34 of communication line sheath, ensure that the communication line has good interference killing feature, thereby guarantee the complete transmission of communication signal, through the outer copper wire weaving layer 23 of power line, ensure that the power line electric field does not disturb the communication line, guarantee the communication quality of communication line.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.

Claims

1. A rubber jacketed flexible cable containing twisted-pair communication wires is characterized in that: including cable core and the cladding at the outside oversheath of cable core, the cable core comprises central support unit around a plurality of power sinle silks of central support unit outside, the communication sinle silk of setting between a plurality of power sinle silks, the communication sinle silk comprises communication conductor, communication line insulation, communication line sheath and the outer copper wire weaving layer of communication line sheath, the inside two communication conductor that are equipped with of communication sinle silk, the outside cladding of every communication conductor has the communication line to be insulating, two communication conductor adopt the form of spiral transposition to twist to form, and the transposition pitch ratio is 6 ~ 10 times, the communication line sheath cladding is outside the communication conductor of transposition, the outside cladding of communication line sheath has the outer copper wire weaving layer of communication line sheath.

2. The cabtyre cable containing twisted-pair communication wires as claimed in claim 1, wherein: the communication line insulation is a skin-foam polyethylene three-layer co-extrusion structure, namely, the communication line insulation is composed of solid core polyethylene, foamed polyethylene and solid core polyethylene, and the dielectric constant of the polyethylene insulation layer can be adjusted by controlling the foaming degree of the middle foaming layer, so that the requirements of different characteristic impedances are met.

3. The cabtyre cable containing twisted-pair communication wires as claimed in claim 1, wherein: the communication wire sheath is room temperature vulcanized silicone rubber.

4. The cabtyre cable containing twisted-pair communication wires as claimed in claim 1, wherein: the outer copper wire braided layer of the communication wire sheath is formed by forward and reverse braiding of a 24-spindle braiding machine, and the one-way coverage rate of the copper wires is larger than 85%.

5. The cabtyre cable containing twisted-pair communication wires as claimed in claim 1, wherein: the outer sheath is made of high-flame-retardant elastomer TPU material, the oxygen index is more than 35, the strength is more than 30MPa, and the tear resistance is more than 20N/mm.

6. The cabtyre cable containing twisted-pair communication wires as claimed in claim 1, wherein: the power wire core is composed of a power wire conductor, a power wire insulation layer and a power wire outer copper wire braided layer, the power wire outer copper wire braided layer is formed by braiding in the forward and reverse directions through a 36-spindle braiding machine, and the one-way coverage rate of the copper wires is larger than 80%.

7. The cabtyre cable of claim 6, wherein said pair-twisted communication cable comprises: the power line insulation is ethylene propylene rubber.

8. The cabtyre cable containing twisted-pair communication wires as claimed in claim 1, wherein: the central support unit is formed by extruding a saddle-shaped thermosetting elastomer outside a central steel wire rope, the steel wire rope is formed by twisting a plurality of strands of thin steel wire bundles, and meanwhile, the steel wire rope has tensile strength and flexibility, the strength of the thermosetting elastomer is greater than 15MPa, and the hardness of the thermosetting elastomer is greater than 80 degrees.